JP2002032189A - Information input device, information input system, input information identification method, coordinate input / detection device, fly / tome identification method, and storage medium - Google Patents

Abstract

(57) [Problem] To provide a coordinate input / detection device capable of reducing tailing or the like in a reproduced image. SOLUTION: The natural and different movements of the indicating means in the "bounce" portion and the "stop" portion of the drawing (the "bounce" portion and the "stop" portion are common in that they steeply move away from the coordinate input / detection area, In the "bounce" part, the time interval between the zero cross point where the slope of the change in the dip position per unit time according to drawing per unit time is zero and the position where the dip disappears is longer than in the "stop" part) The time interval between the zero-cross point detected in step S2 and the position where the dip disappears is compared with a predetermined threshold value set in advance (step S4). By discriminating between "stop" and "stop", the input state can be more properly recognized, and reproduced image processing with reduced tailing or the like for the "stop" portion can be performed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an information input device, an information input system, an input information identification method, a coordinate input / detection device, a fly / tome identification method, and a storage medium.

[0002]

2. Description of the Related Art Conventionally, as this kind of coordinate input / detection device, when a coordinate input surface is pressed with a pen or when the pen approaches the coordinate input surface, an electric change is generated by electrostatic or electromagnetic induction. There is something to detect.

[0003] Another method is disclosed in Japanese Patent Application Laid-Open No. 61-23 / 1986.
There is an ultrasonic touch panel coordinate input / detection device as disclosed in Japanese Patent No. 9322 or the like. In brief, the surface acoustic waves transmitted onto the panel are attenuated by touching the panel, and the position is detected.

However, the method of detecting a coordinate position by electrostatic or electromagnetic induction requires an electric switch function on the coordinate input surface, so that the manufacturing cost is high and a cable for connecting the pen to the main body is required. Therefore, there is a difficulty in operability.

[0005] In addition, since the ultrasonic method is based on the premise of finger input, when a pen input is performed with a material that absorbs on the panel (a soft and elastic material) and a straight line is drawn, At this point, a stable attenuation is obtained, but when the pen is moved, sufficient contact is not obtained and the straight line is broken. But to get enough contact,
If the pen is pressed with an excessive force, the pen moves and receives stress due to the elasticity of the pen, causing distortion,
Force to return during movement works. For this reason, once an attempt is made to draw a curve at the time of pen input, the force for holding down the pen is weakened, and the force for restoring the distortion is excellent, so that it is not possible to obtain stable attenuation and it is determined that the input has been interrupted. For this reason, there is a problem that reliability cannot be ensured as pen input.

However, with respect to such problems of the prior art, optical coordinate input / detection represented by those disclosed in JP-A-5-173699 and JP-A-9-319501 is disclosed. A touch panel type coordinate input / detection device can be realized with a relatively simple configuration that is solved by the device.

[0007]

In recent years, such an optical coordinate input / detection device has been positioned as a powerful tool for inputting and selecting information with the spread of personal computers and the like. There are many other issues that have been studied in addition to those proposed in the application and those disclosed in the official gazette, but are not yet complete, and there are many issues that need to be solved for full-scale practical application. .

For example, in the case of such an optical touch panel type coordinate input / detection device, unlike the case of the ultrasonic type, the coordinate input / detection area surface (touch panel) itself has no detection function, and Since the optical detection area is set at a position slightly away from the detection area surface toward the front side, the actual drawing operation (writing of characters, etc.) by a finger or the like on the coordinate input / detection area plane and the drawing coordinate position , A spatial deviation occurs from the detection operation, and a drawback or the like occurs on a drawn image reproduced through a display or the like with respect to a drawn image intended by a drawer. In other words, "tailing" is a feature of the optical touch panel, which is not detected when a finger or the like leaves the touch panel, but is detected when the touch panel is separated from the touch panel by a certain distance or more. Up to this point, it is assumed that the user is still touching the touch panel even though his / her finger has been released from the touch panel to finish drawing the desired character (touch = inserted state). Imitation), and a line segment is drawn in an unintended part in a reproduced image.

For example, as shown in FIG. 37, when drawing with a finger 202 or the like along the surface of a touch panel 201 in which a coordinate input / detection area 200 by detection light is set on the front side, the drawing ends at point P, When the finger 202 is to be separated from the surface of the touch panel 201, the finger 202 is detected by the detection light up to a point P ′ exiting the coordinate input / detection area 200, and it is assumed that the finger 202 is touching the touch panel 201. At the 'point, it is detached for the first time. As a result, the drawing line 203 displayed on the touch panel 201 through the display does not end at the point P but extends to the point P ′, and the points P to P ′ are displayed as a trail 204. As a result, when a realistic drawing is considered, for example, in the drawing of the kanji “2” as shown in FIG. 38 (a), “−” is drawn, a finger is released at a part, and “−” is drawn. It will be released, but the kanji "two""stop"
When the finger is released at the portion 205, the above-described tailing phenomenon occurs,
A beard-like tail 204 as shown in FIG. 38 (b) occurs in the reproduced image, making it difficult to see. This allows
After drawing, use the eraser tool or the like to
A troublesome operation such as erasing a part is required.

[0010] Further, to complicate matters, kanji and hiragana in Japanese include a "bounce" portion 206 such as the kanji "sun" shown in FIG. 38 (c) and a hiragana "tsu" shown in FIG. "," And "bounce" are necessary drawings, and need to be distinguished from tailing in the "stop" portion 205. 38 (d) and 38 (f) show an example of a reproduced drawing image based on the drawing of the kanji “dimension” and the hiragana “tsu”. A tail 204 appears in the “stop” portion 205, and "Bounce" part 206 and "Harai" part 20
7 shows that the tail 204 also appears at the tip of FIG.

As a result, the pointing state of the pointing means such as a finger, especially the judgment or recognition of insertion / non-insertion (touch / detachment) is shifted from the actual pointing state, and is not always properly performed. is there.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an information processing apparatus capable of more accurately recognizing a pointing state of an object indicating a drawing position in an information input area, performing more appropriate information input processing, and reducing tailing or the like in a reproduced image. An object of the present invention is to provide an input device, an information input system, an input information identification method, a coordinate input / detection device, a fly / tome identification method, and a storage medium.

[0013]

According to the first aspect of the present invention,
In an information input device that detects a predetermined object instructing a two-dimensional information input area and outputs it as predetermined input information, a predetermined component per unit time based on a continuous information input operation by the object in the information input area If the time interval between the zero-cross point at which the slope of the change becomes zero and the end of the continuous information input operation is greater than a predetermined threshold, the zero-cross point and the end of the continuous information input operation Validate the input information linking the department.

[0014] Accordingly, a tail-drawing noise that occurs at the end position of the drawing stroke, but jumps in spite of the stop, and is an unintended “bounce”, or a beard-like drawing noise generated at the start position of the drawing stroke. Can be reliably suppressed.

According to a second aspect of the present invention, there is provided an information input apparatus for detecting a predetermined object indicating a two-dimensional information input area by light receiving means and outputting the same as predetermined input information. Zero-crossing point detecting means for detecting a zero-crossing point at which the slope of the change per unit time of the dip position of the detection signal of the light-receiving means according to a typical information input operation becomes zero; and A post-bending duration detecting means for detecting a time interval between the zero cross point and the position where the dip disappears, and a threshold storing means for storing a predetermined threshold value for the time interval between the zero cross point and the position where the dip disappears,
Comparing means for comparing the time interval detected by the post-bending duration detecting means with a predetermined threshold stored in the threshold storage means; and wherein the time interval detected by the post-bending duration detecting means is a predetermined value. A fly / toning discriminating unit that validates input information connecting the zero-cross point and the position where the dip has disappeared when the threshold value is larger than the threshold value.

Therefore, the natural and different movement of the object at the "bounce" portion and the "stop" portion of the drawing in accordance with the continuous information input operation by the object such as the finger (the "bounce" portion and the "stop" portion are steep) In the `` bounce '' part, the time interval between the zero-cross point where the slope of the change per unit time of the dip position according to drawing is zero and the time interval where the dip disappears is The time interval between the zero-cross point and the position where the dip disappears is compared with a predetermined threshold value set in advance. By identifying whether it is "" or "stop", the input state can be recognized more appropriately, and the reproduction image processing in which the tailing or the like of the "stop" portion is reduced can be performed.

According to a third aspect of the present invention, there is provided an information input apparatus for detecting a predetermined object instructing a two-dimensional information input area by light receiving means and outputting the same as predetermined input information. Zero-crossing point detecting means for detecting a zero-crossing point at which the slope of the change per unit time of the dip position of the detection signal of the light-receiving means according to a typical information input operation becomes zero, and the zero-crossing point detected by the zero-crossing point detecting means A time interval detecting means for detecting a time interval between a zero-cross point and an end position of the continuous information input operation by the object; and a predetermined time interval between the zero-cross point and the end position of the continuous information input operation by the object. Threshold value storing means for storing the threshold value of the time interval detected by the time interval detecting means and stored in the threshold value storing means. Comparing means for comparing the constant threshold value,
When the time interval detected by the time interval detecting means is larger than a predetermined threshold value, a fly / timer for validating input information connecting the zero-cross point and the end position of the continuous information input operation by the object. Determining means.

Therefore, the natural and different movement of the object at the "bounce" portion and the "stop" portion of the drawing in accordance with the continuous information input operation by the object such as the finger (the "bounce" portion and the "stop" portion are steep) In the `` bounce '' part, the time interval between the zero-cross point where the slope of the change in the dip position according to drawing per unit time is zero and the drawing end position is ), And compares the time interval between the zero-cross point and the end position of the drawing with a predetermined threshold value set in advance. By discriminating between the “stop” and the “stop”, the input state can be more appropriately recognized, and the reproduction image processing in which the tailing or the like for the “stop” portion that is an unintended “bounce” can be performed can be performed.

According to a fourth aspect of the present invention, there is provided an information input apparatus for detecting a predetermined object indicating a two-dimensional information input area by light receiving means and outputting the same as predetermined input information. Zero-crossing point detecting means for detecting a zero-crossing point at which the inclination of the change per unit time of the dip position according to a typical information input operation becomes zero; Interval detecting means for detecting a time interval from a start position of a typical information input operation, and a threshold storage for storing a predetermined threshold value regarding a time interval between the zero cross point and a start position of a continuous information input operation by the object Means for comparing the time interval detected by the time interval detection means with a predetermined threshold value stored in the threshold value storage means. Means, and when the time interval detected by the time interval detecting means is greater than a predetermined threshold value, input information connecting the zero-cross point and a start position of a continuous information input operation by the object is validated. Fly / toning determining means.

Therefore, attention is paid to the natural and different movements of the object in the "bounce" portion and the "stop" portion of the drawing according to the continuous information input operation by the object such as a finger, and the unit of the dip position according to the drawing The time interval between the zero-cross point where the slope of the change per unit time becomes zero and the drawing start position is compared with a predetermined threshold value, and the drawing by the object lands on an object such as a finger according to its magnitude. The input state can be recognized more properly by identifying whether or not it is beard-like drawing noise that occurs at the start position of the drawing stroke depending on the method, and the beard-like drawing noise that occurs at the start position of the drawing stroke is reduced. This enables the reproduced image processing to be performed.

According to a fifth aspect of the present invention, there is provided an information input apparatus for detecting a predetermined object instructing a two-dimensional information input area by light receiving means and outputting the same as predetermined input information. Zero-crossing point detecting means for detecting a zero-crossing point at which the slope of the change per unit time of the peak position of the detection signal of the light-receiving means according to a typical information input operation becomes zero; and A time interval detecting means for detecting a time interval between a zero-cross point and an end position of the continuous information input operation by the object; and a predetermined time interval between the zero-cross point and the end position of the continuous information input operation by the object. Threshold storage means for storing the threshold value of the time interval, and the time interval detected by the time interval detection means and the location stored in the threshold value storage means. Comparison means for comparing the threshold value of the time interval, and when the time interval detected by the time interval detection means is larger than a predetermined threshold value, the zero cross point and the end position of the continuous information input operation by the object A fly / tome discriminating means for validating the input information to be connected.

Therefore, the natural and different movement of the object at the "bounce" and "stop" portions of the drawing in accordance with the continuous information input operation by the object such as the finger ("bounce" and "stop" portions are steep) In the "bounce" part, the time interval between the zero-cross point where the peak position change according to drawing per unit time becomes zero and the drawing end position is "stop". ) Portion, and compares the time interval between the zero-cross point and the end position of the drawing with a predetermined threshold value set in advance.
By identifying whether the drawing by the object is “bounce” or “stop” according to the magnitude, the input state can be recognized more properly, and tailing etc. for the “stop” part that is unintended “bounce” can be performed. Reduced reproduction image processing can be performed.

According to a sixth aspect of the present invention, there is provided an information input device for detecting a predetermined object instructing a two-dimensional information input area by light receiving means and outputting the same as predetermined input information. Zero-crossing point detecting means for detecting a zero-crossing point at which the slope of the change per unit time of the peak position of the detection signal of the light-receiving means according to a typical information input operation becomes zero, and the zero-crossing point detected by the zero-crossing point detecting means Time interval detecting means for detecting a time interval between a zero cross point and a start position of a continuous information input operation by the object; and a predetermined time interval between the zero cross point and a start position of a continuous information input operation by the object. Threshold storage means for storing a threshold of the time interval, and the time interval detected by the time interval detection means and a location stored in the threshold storage means. Comparing means for comparing the time interval detected by the time interval detecting means, and when the time interval detected by the time interval detecting means is greater than a predetermined threshold, the zero-cross point and the start position of the continuous information input operation by the object. And a fly / tome discriminating means for validating the input information to be connected.

Therefore, attention is paid to the natural and different movements of the object in the "bounce" portion and the "stop" portion of the drawing in response to the continuous information input operation by the object such as the finger, and the unit of the peak position according to the drawing. The time interval between the zero-cross point where the slope of the change per unit time becomes zero and the drawing start position is compared with a predetermined threshold value, and the drawing by the object lands on an object such as a finger according to its magnitude. The input state can be recognized more properly by identifying whether or not it is a beard-shaped drawing noise generated at the start position of the drawing stroke, and the beard-shaped drawing noise generated at the start position of the drawing stroke is reduced. This enables the reproduced image processing to be performed.

The invention described in claim 7 is the third invention to the sixth invention.
The information input device according to any one of the above, further comprising a plurality of said light receiving means, wherein said fly / toning discriminating means is detected by said time interval detecting means based on a light intensity distribution detected by all said light receiving means. When the time interval is larger than a predetermined threshold, input information connecting the zero-cross point and a start position or an end position of a continuous information input operation by the object is validated.

[0026] Accordingly, a tail-drawing noise that occurs at the end position of the drawing stroke, but does not intend to “bounce” but stops at the “stop” portion or a beard-like drawing noise generated at the start position of the drawing stroke. Can be reliably suppressed irrespective of these generation directions.

According to an eighth aspect of the present invention, there is provided an information input apparatus for detecting a predetermined object indicating a two-dimensional information input area and outputting the same as predetermined input information. Zero-cross point detection means for detecting a zero-cross point at which the slope of a change per unit time of the two-dimensional position coordinate component according to the input operation becomes zero, and a continuation of the zero-cross point detected by the zero-cross point detection means and the object Interval detecting means for detecting a time interval from the end position of a typical information input operation, and a threshold storage for storing a predetermined threshold value regarding a time interval between the zero cross point and the end position of the continuous information input operation by the object Means for comparing the time interval detected by the time interval detection means with a predetermined threshold value stored in the threshold value storage means. And when the time interval detected by the time interval detecting means is greater than a predetermined threshold value, the input information connecting the zero cross point and the end position of the continuous information input operation by the object is validated. /
And a torch determination unit.

Therefore, natural and different movements of the object at the "bounce" and "stop" portions of the drawing in accordance with the continuous information input operation by the object such as the finger ("bounce" and "stop" portions are steep) In the `` bounce '' part, the slope of the change per unit time of the two-dimensional position coordinate component detected according to the drawing is zero, The time interval between the zero-crossing point and the end position of the drawing is compared with a predetermined threshold value set in advance. By recognizing whether the drawing is "bounce" or "stop", it is possible to recognize the input state more properly, and reproduction image processing that reduces tailing etc. for "stop" part which is unintended "bounce" is performed It becomes possible.

According to a ninth aspect of the present invention, there is provided an information input device for detecting a predetermined object indicating a two-dimensional information input area and outputting the same as predetermined input information. A zero-cross point detecting means for detecting a zero-cross point at which a gradient of a change per unit time of a two-dimensional position coordinate component according to an input operation becomes zero, and a continuation of the zero-cross point detected by the zero-cross point detecting means and the object Interval detecting means for detecting a time interval from a start position of a typical information input operation, and a threshold storage for storing a predetermined threshold value regarding a time interval between the zero cross point and a start position of a continuous information input operation by the object Means for comparing the time interval detected by the time interval detection means with a predetermined threshold value stored in the threshold value storage means. And when the time interval detected by the time interval detecting means is larger than a predetermined threshold, validity of input information connecting the zero-cross point and a start position of a continuous information input operation by the object. /
And a torch determination unit.

Therefore, attention is paid to the natural and different movements of the object in the "bounce" portion and the "stop" portion of the drawing in response to the continuous information input operation by the object such as the finger, and the two detected by the drawing. Comparing the time interval between the zero-cross point where the inclination of the change per unit time of the dimensional position coordinate component becomes zero and the drawing start position, and a predetermined threshold value set in advance,
By identifying whether the drawing by the object is the beard-like drawing noise generated at the start position of the drawing stroke depending on how the object such as a finger lands according to the magnitude, the input state can be more appropriately recognized, Reproduction image processing in which beard-like drawing noise generated at the start position of a drawing stroke is reduced is enabled.

[0031] According to a tenth aspect of the present invention, in the information input device according to the eighth or ninth aspect, the fly / toning discriminating means is configured to detect the time interval based on all coordinate components constituting a two-dimensional position coordinate. When the time interval detected by the above is larger than a predetermined threshold value, input information connecting the zero-cross point and the start position or end position of the continuous information input operation by the object is validated.

Therefore, a bouncing noise generated at the start position of the drawing stroke or a tailing of the "stop" portion, which is an unintended "bounce" generated at the end position of the drawing stroke and bouncing despite being stopped. Can be reliably suppressed irrespective of these generation directions.

According to an eleventh aspect of the present invention, in the information input device according to any one of the first to tenth aspects, the information input area is configured to project light emitted from a light source into a plate shape and project the light. Formed by

Therefore, a two-dimensional information input area for accepting the insertion of an object can be reliably formed, and an information input device that realizes a neglected difference, complete transparency, and high drawing feeling can be provided.

According to a twelfth aspect of the present invention, in the information input device according to any one of the first to tenth aspects, the information input area is configured to sequentially scan and project the light beam emitted from the light source. It is formed.

Therefore, a two-dimensional information input area for accepting the insertion of an object is reliably formed, and an information input apparatus which realizes a neglected difference, complete transparency, and high drawing feeling can be provided.

According to the thirteenth aspect of the present invention,
In the information input device according to any one of 6, 7, 8, 9, and 10, the information input region is an imaging range of an imaging unit.

Therefore, a two-dimensional information input area for accepting the insertion of an object is reliably formed, and it is possible to provide an information input device which realizes a neglected difference, complete transparency, and high drawing feeling.

The invention according to claim 14 is the invention according to claims 1, 2, and
In the information input device according to any one of 3, 4, 7, 8, 9, and 10, the information input area includes a light path formed by the light receiving unit and a light emitting unit provided opposite to the light receiving unit in a matrix. It is formed by disposing.

Therefore, a two-dimensional information input area for accepting the insertion of an object is reliably formed, and it is possible to provide an information input device which realizes a neglected difference, complete transparency, and high drawing feeling.

According to a fifteenth aspect of the present invention, there is provided the information input system according to any one of the first to fourteenth aspects, wherein the information input area is disposed on the display surface of the display device so as to match the information input area. An input device; and a control device that controls display of the display device based on an input from the information input device.

Accordingly, an information input system which does not have a physical surface such as a coordinate input surface (touch panel surface) and has excellent visibility even when used while being mounted on the display surface of a display device is inexpensive. Can be provided.

The information input system according to the invention of claim 16 is a writing board for accepting handwriting, and the information input area is arranged on a writing surface of the writing board so as to match the information input area. An information input device described above, and a control device that controls information written on the writing board based on an input from the information input device.

Therefore, an information input system which does not have a physical surface such as a coordinate input surface (touch panel surface) and has excellent visibility even when used while being mounted on the display surface of a display device is inexpensive. Can be provided.

The invention according to claim 17 is an input information identification method for detecting a predetermined object indicating a two-dimensional information input area by light receiving means and identifying input information corresponding to an operation of the object. A zero-cross point at which a slope of a change per unit time of a dip position of a detection signal of the light receiving means according to a continuous information input operation by the object in an information input area is zero is detected, and the zero-cross point and the dip disappear. Detects the time interval with the position, and compares the time interval with a predetermined threshold.If the time interval is larger than the predetermined threshold, the input information connecting the zero-cross point and the position where the dip has disappeared. To enable.

Therefore, the natural and different movement of the object at the "bounce" portion and the "stop" portion of the drawing in accordance with the continuous information input operation by the object such as the finger (the "bounce" portion and the "stop" portion are steep) In the `` bounce '' part, the time interval between the zero-cross point where the slope of the change per unit time of the dip position according to drawing is zero and the time interval where the dip disappears is The time interval between the zero-cross point and the position where the dip disappears is compared with a predetermined threshold value set in advance. By identifying whether it is "" or "stop", the input state can be recognized more appropriately, and the reproduction image processing in which the tailing or the like of the "stop" portion is reduced can be performed.

The invention according to claim 18 is an input information identification method for detecting a predetermined object indicating a two-dimensional information input area by light receiving means and identifying input information corresponding to an operation of the object. In the information input area, a zero-cross point at which the slope of a change per unit time of the dip position of the detection signal of the light receiving means according to the continuous information input operation by the object is zero is detected, and the zero-cross point and the object are used. The time interval between the end position of the continuous information input operation is detected, and the time interval is compared with a predetermined threshold value for the time interval between the zero cross point and the end position of the continuous information input operation by the object. When the time interval is larger than a predetermined threshold value, input information connecting the zero-cross point and the end position of the continuous information input operation by the object is validated.

Therefore, the natural and different movements of the object at the "bounce" portion and the "stop" portion of the drawing in accordance with the continuous information input operation by the object such as the finger (the "bounce" portion and the "stop" portion are steep) In the `` bounce '' part, the time interval between the zero-cross point where the slope of the change in the dip position according to drawing per unit time is zero and the drawing end position is ), And compares the time interval between the zero-cross point and the end position of the drawing with a predetermined threshold value set in advance. By discriminating between the “stop” and the “stop”, the input state can be more appropriately recognized, and the reproduction image processing in which the tailing or the like for the “stop” portion that is an unintended “bounce” can be performed can be performed.

According to a nineteenth aspect of the present invention, there is provided an input information identification method for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and identifying input information corresponding to an operation of the object. In the information input area, a zero-cross point at which the slope of a change per unit time of the dip position of the detection signal of the light receiving means according to the continuous information input operation by the object is zero is detected, and the zero-cross point and the object are used. The time interval between the start position of the continuous information input operation and the time interval is compared with a predetermined threshold value for the time interval between the zero cross point and the start position of the continuous information input operation by the object. When the time interval is larger than a predetermined threshold value, input information connecting the zero-cross point and a start position of a continuous information input operation by the object is validated.

Therefore, attention is paid to the natural and different movements of the object at the “bounce” portion and “stop” portion of the drawing according to the continuous information input operation by the object such as the finger, and the unit of the dip position according to the drawing The time interval between the zero-cross point where the slope of the change per unit time becomes zero and the drawing start position is compared with a predetermined threshold value, and the drawing by the object lands on an object such as a finger according to its magnitude. The input state can be recognized more properly by identifying whether or not it is a beard-shaped drawing noise generated at the start position of the drawing stroke, and the beard-shaped drawing noise generated at the start position of the drawing stroke is reduced. This enables the reproduced image processing to be performed.

According to a twentieth aspect of the present invention, there is provided an input information identifying method for detecting a predetermined object pointing to a two-dimensional information input area by light receiving means and identifying input information corresponding to an operation of the object. In the information input area, a zero-cross point at which the slope of a change per unit time of the peak position of the detection signal of the light receiving means according to the continuous information input operation by the object is zero is detected, and the zero-cross point and the object are used. The time interval between the end position of the continuous information input operation is detected, and the time interval is compared with a predetermined threshold value for the time interval between the zero cross point and the end position of the continuous information input operation by the object. When the time interval is larger than a predetermined threshold value, input information connecting the zero-cross point and the end position of the continuous information input operation by the object is validated.

Therefore, the natural and different movements of the object at the “bounce” portion and the “stop” portion of the drawing according to the continuous information input operation by the object such as the finger (the “bounce” portion and the “stop” portion are steep) In the "bounce" part, the time interval between the zero-cross point where the peak position change according to drawing per unit time becomes zero and the drawing end position is "stop". ), And compares the time interval between the zero-cross point and the end position of the drawing with a predetermined threshold value set in advance.
By identifying whether the drawing by the object is “bounce” or “stop” according to the magnitude, the input state can be recognized more properly, and tailing etc. for the “stop” part that is unintended “bounce” can be performed. Reduced reproduction image processing can be performed.

According to a twenty-first aspect of the present invention, there is provided an input information identification method for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and identifying input information corresponding to an operation of the object. In the information input area, a zero-cross point at which the inclination of a change per unit time of the peak position of the detection signal of the light receiving means according to the continuous information input operation by the object is zero is detected, and the zero-cross point and the object are used. The time interval between the start position of the continuous information input operation and the time interval is compared with a predetermined threshold value for the time interval between the zero cross point and the start position of the continuous information input operation by the object. When the time interval is larger than a predetermined threshold value, input information connecting the zero-cross point and a start position of a continuous information input operation by the object is validated.

Therefore, attention is paid to the natural and different movement of the object in the “bounce” portion and the “stop” portion of the drawing according to the continuous information input operation by the object such as a finger, and the unit of the peak position according to the drawing The time interval between the zero-crossing point at which the slope of the change per unit time becomes zero and the drawing start position is compared with a predetermined threshold value, and the drawing by the object is performed based on the magnitude of the threshold. The input state can be recognized more properly by identifying whether or not it is beard-like drawing noise that occurs at the start position of the drawing stroke depending on the method, and the beard-like drawing noise that occurs at the start position of the drawing stroke is reduced. This enables the reproduced image processing to be performed.

According to a twenty-second aspect of the present invention, in the input information identification method according to any one of the eighteenth to twenty-first aspects,
When the time interval detected based on the light intensity distributions detected by all the light receiving means is greater than a predetermined threshold, the start position or the end position of the continuous information input operation by the zero-cross point and the object Enable the input information that connects with.

Accordingly, a tail-drawing noise generated at the end position of the drawing stroke, a tailing of the "stop" portion, which is an unintended "bounce", and a beard-shaped drawing noise generated at the start position of the drawing stroke. Can be reliably suppressed irrespective of these generation directions.

According to a twenty-third aspect of the present invention, there is provided an input information identification method for detecting a predetermined object pointing to a two-dimensional information input area and identifying input information corresponding to an operation of the object. Detecting a zero-cross point at which the slope of the change per unit time of the two-dimensional position coordinate component according to the continuous information input operation by the object becomes zero,
Detecting a time interval between the zero-cross point and the end position of the continuous information input operation by the object, the time interval;
A predetermined threshold value for the time interval between the zero-cross point and the end position of the continuous information input operation by the object is compared, and when the time interval is larger than the predetermined threshold value, the continuation by the zero-cross point and the object Input information connecting the end position of a typical information input operation is validated.

Therefore, the natural and different movements of the object at the "bounce" portion and the "stop" portion of the drawing in accordance with the continuous information input operation by the object such as the finger (the "bounce" portion and the "stop" portion are steep) In the `` bounce '' part, the slope of the change per unit time of the two-dimensional position coordinate component detected according to the drawing is zero, The time interval between the zero-crossing point and the end position of the drawing is compared with a predetermined threshold value set in advance. By recognizing whether the drawing is "bounce" or "stop", it is possible to recognize the input state more properly, and reproduction image processing that reduces tailing etc. for "stop" part which is unintended "bounce" is performed It becomes possible.

According to a twenty-fourth aspect of the present invention, there is provided an input information identifying method for detecting a predetermined object pointing to a two-dimensional information input area and identifying input information corresponding to the motion of the object. Detecting a zero-cross point at which the slope of the change per unit time of the two-dimensional position coordinate component according to the continuous information input operation by the object at zero becomes zero,
Detecting a time interval between the zero-cross point and a start position of a continuous information input operation by the object, and the time interval;
A predetermined threshold value for the time interval between the zero-cross point and the start position of the continuous information input operation by the object is compared, and when the time interval is larger than a predetermined threshold value, the continuation by the zero-cross point and the object is performed. Input information connecting the start position of a typical information input operation is made valid.

Accordingly, attention is paid to natural and different movements of the object in the “bounce” portion and the “stop” portion of the drawing according to the continuous information input operation by the object such as the finger, and the two detected by the drawing. Comparing the time interval between the zero-cross point where the inclination of the change per unit time of the dimensional position coordinate component becomes zero and the drawing start position, and a predetermined threshold value set in advance,
By identifying whether the drawing by the object is the beard-like drawing noise generated at the start position of the drawing stroke depending on how the object such as a finger lands according to the magnitude, the input state can be more appropriately recognized, Reproduction image processing in which beard-like drawing noise generated at the start position of a drawing stroke is reduced is enabled.

According to a twenty-fifth aspect of the present invention, in the input information identification method according to the twenty-third aspect or the twenty-fourth aspect, the time interval detected based on all coordinate components constituting the two-dimensional position coordinates is smaller than a predetermined threshold. If it is larger, the input information connecting the zero cross point and the start position or end position of the continuous information input operation by the object is validated.

Therefore, a bouncing noise generated at the end position of the drawing stroke and a tailing at the "stop" portion, which is an unintended "bounce", which occurs at the end position of the drawing stroke, or a beard-shaped drawing noise generated at the start position of the drawing stroke Can be reliably suppressed irrespective of these generation directions.

According to a twenty-sixth aspect of the present invention, there is stored a program for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and causing a computer to identify input information corresponding to the operation of the object. Computer-readable storage medium, wherein the computer has a slope of a change per unit time of a dip position of a detection signal of the light receiving unit according to a continuous information input operation by the object in the information input area. A zero-cross point detection function for detecting a zero-cross point that becomes zero; a post-bending duration detection function for detecting a time interval between the zero-cross point and the position where the dip disappears; and a time between the zero-cross point and the position where the dip disappears. A comparison function for comparing a predetermined threshold value for the interval with the detected time interval; If more greater, to execute an input information determination function to enable input information connecting the position where the zero-cross point and a dip is extinguished.

Therefore, the natural and different movements of the object at the “bounce” portion and the “stop” portion of the drawing according to the continuous information input operation by the object such as the finger (the “bounce” portion and the “stop” portion are steep) In the `` bounce '' part, the time interval between the zero-cross point where the slope of the change per unit time of the dip position according to drawing is zero and the time interval where the dip disappears is The time interval between the zero-cross point and the position where the dip disappears is compared with a predetermined threshold value set in advance. By identifying whether it is "" or "stop", the input state can be recognized more appropriately, and the reproduction image processing in which the tailing or the like of the "stop" portion is reduced can be performed.

According to a twenty-seventh aspect of the present invention, there is stored a program for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means, and causing a computer to identify input information corresponding to the operation of the object. Computer-readable storage medium, wherein the computer has a slope of a change per unit time of a dip position of a detection signal of the light receiving unit according to a continuous information input operation by the object in the information input area. A zero-crossing point detecting function for detecting a zero-crossing point that becomes zero, a time interval detecting function for detecting a time interval between the zero-crossing point and an end position of a continuous information input operation by the object, A predetermined threshold value for a time interval from the end position of the continuous information input operation is compared with the detected time interval. And an input information discriminating function for validating input information connecting the zero-cross point and the end position of the continuous information input operation by the object when the time interval is larger than a predetermined threshold value. Let it run.

Therefore, the natural and different movements of the object at the "bounce" portion and the "stop" portion of the drawing in accordance with the continuous information input operation by the object such as the finger (the "bounce" portion and the "stop" portion are steep) In the `` bounce '' part, the time interval between the zero-cross point where the change in dip position according to drawing per unit time is zero and the drawing end position is `` stop '' ), And compares the time interval between the zero-cross point and the end position of the drawing with a predetermined threshold value set in advance. By discriminating between the "stop" and the "stop", the input state can be more appropriately recognized, and the reproduction image processing in which the tailing or the like for the "stop" portion which is an unintended "bounce" can be reduced.

According to a twenty-eighth aspect of the present invention, there is stored a program for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and causing a computer to identify input information corresponding to the operation of the object. Computer-readable storage medium, wherein the computer has a slope of a change per unit time of a dip position of a detection signal of the light receiving unit according to a continuous information input operation by the object in the information input area. A zero-crossing point detection function for detecting a zero-crossing point that becomes zero, a time interval detection function for detecting a time interval between the zero-crossing point and a start position of a continuous information input operation by the object, and a zero-crossing point and the object. A predetermined threshold value for a time interval from a start position of a continuous information input operation is compared with the detected time interval. And an input information discriminating function for validating input information connecting the zero-cross point and a start position of a continuous information input operation by the object when the time interval is larger than a predetermined threshold value. Let it run.

Therefore, attention is paid to the natural and different movement of the object in the “bounce” portion and the “stop” portion of the drawing according to the continuous information input operation by the object such as the finger, and the unit of the dip position according to the drawing The time interval between the zero-crossing point at which the slope of the change per unit time becomes zero and the drawing start position is compared with a predetermined threshold value, and the drawing by the object is performed based on the magnitude of the threshold. The input state can be recognized more properly by identifying whether or not it is beard-like drawing noise that occurs at the start position of the drawing stroke depending on the method, and the beard-like drawing noise that occurs at the start position of the drawing stroke is reduced. This enables the reproduced image processing to be performed.

According to a twenty-ninth aspect of the present invention, there is stored a program for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and causing a computer to identify input information corresponding to the operation of the object. Computer-readable storage medium, wherein the computer has a slope of a change per unit time of a peak position of a detection signal of the light receiving unit according to a continuous information input operation by the object in the information input area. A zero-cross point detection function for detecting a zero-cross point that becomes zero, a time interval detection function for detecting a time interval between the zero-cross point and the end position of the continuous information input operation by the object, A predetermined threshold value for a time interval between the end position of the continuous information input operation and the detected time interval is compared. Performing a comparison function and an input information discriminating function for validating input information connecting the zero-cross point and the end position of the continuous information input operation by the object when the time interval is greater than a predetermined threshold value. Let it.

Therefore, the natural and different movements of the object in the “bounce” portion and the “stop” portion of the drawing in accordance with the continuous information input operation by the object such as the finger (the “bounce” portion and the “stop” portion are steep) In the "bounce" part, the time interval between the zero-cross point where the peak position change according to drawing per unit time becomes zero and the drawing end position is "stop". ) Portion, and compares the time interval between the zero-cross point and the end position of the drawing with a predetermined threshold value set in advance.
By identifying whether the drawing by the object is “bounce” or “stop” according to the magnitude, the input state can be recognized more properly, and tailing etc. for the “stop” part that is unintended “bounce” can be performed. Reduced reproduction image processing can be performed.

According to a thirty-first aspect of the present invention, a program for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and causing a computer to identify input information corresponding to the operation of the object is stored. Computer-readable storage medium, wherein the computer has a slope of a change per unit time of a peak position of a detection signal of the light receiving unit according to a continuous information input operation by the object in the information input area. A zero-crossing point detection function for detecting a zero-crossing point that becomes zero, a time interval detection function for detecting a time interval between the zero-crossing point and a start position of a continuous information input operation by the object, and a zero-crossing point and the object. A predetermined threshold value relating to a time interval from a start position of a continuous information input operation is compared with the detected time interval. Executing a comparison function and an input information discriminating function for validating input information connecting the zero-cross point and a start position of a continuous information input operation by the object when the time interval is greater than a predetermined threshold value. Let it.

Therefore, attention is paid to the natural and different movements of the object at the “bounce” portion and “stop” portion of the drawing according to the continuous information input operation by the object such as a finger, and the unit of the peak position according to the drawing The time interval between the zero-crossing point at which the slope of the change per unit time becomes zero and the drawing start position is compared with a predetermined threshold value, and the drawing by the object is performed based on the magnitude of the threshold. The input state can be recognized more properly by identifying whether or not it is beard-like drawing noise that occurs at the start position of the drawing stroke depending on the method, and the beard-like drawing noise that occurs at the start position of the drawing stroke is reduced. This enables the reproduced image processing to be performed.

According to a thirty-first aspect of the present invention, there is provided a computer-readable storage medium storing a program for detecting a predetermined object indicating a two-dimensional information input area and causing the computer to identify input information corresponding to the operation of the object. A possible storage medium, wherein the computer detects a zero-cross point at which a gradient of a change per unit time of a two-dimensional position coordinate component according to a continuous information input operation by the object in the information input area becomes zero. A zero-crossing point detecting function, a time interval detecting function for detecting a time interval between the zero-crossing point and the end position of the continuous information inputting operation by the object, and a continuous information inputting operation by the zero-crossing point and the object. A predetermined threshold value for a time interval with the end position, a comparison function for comparing the detected time interval, and the time interval It is larger than a predetermined threshold value, to execute the input information determination function to enable input information connecting the end position of the continuous data input operations by the object and the zero-cross point.

Therefore, the natural and different movement of the object at the “bounce” portion and the “stop” portion of the drawing in accordance with the continuous information input operation by the object such as the finger (the “bounce” portion and the “stop” portion are steep) In the `` bounce '' portion, the slope of the change per unit time of the two-dimensional position coordinate component detected according to the drawing is zero, the zero cross point where the slope of the change per unit time is zero, and the end position of the drawing The time interval between the zero-cross point and the end position of the drawing is compared with a predetermined threshold value set in advance. By recognizing whether the drawing is "bounce" or "stop", the input state can be recognized more properly, and reproduction image processing that reduces tailing etc. for "stop" part which is unintended "bounce" is realized. It becomes possible.

According to a thirty-second aspect of the present invention, there is provided a computer-readable storage medium storing a program for detecting a predetermined object indicating a two-dimensional information input area and causing the computer to identify input information corresponding to the operation of the object. A possible storage medium, wherein the computer detects a zero-cross point at which a gradient of a change per unit time of a two-dimensional position coordinate component according to a continuous information input operation by the object in the information input area becomes zero. A zero-crossing point detecting function, a time interval detecting function for detecting a time interval between the zero-crossing point and a start position of a continuous information inputting operation by the object, and a continuous information inputting operation by the zero-crossing point and the object. A comparison function for comparing a predetermined threshold value with respect to a time interval with a start position and the detected time interval, and the time interval; It is larger than a predetermined threshold value, to execute the input information determination function to enable input information connecting the starting position of the continuous data input operations by the object and the zero-cross point.

Therefore, attention is paid to natural and different movements of the object in the “bounce” portion and the “stop” portion of the drawing in response to the continuous information input operation by the object such as the finger, and the two detected by the drawing. Comparing the time interval between the zero-cross point where the inclination of the change per unit time of the dimensional position coordinate component becomes zero and the drawing start position, and a predetermined threshold value set in advance,
By identifying whether the drawing by the object is the beard-like drawing noise generated at the start position of the drawing stroke depending on how the object such as a finger lands according to the magnitude, the input state can be more appropriately recognized, Reproduction image processing in which beard-like drawing noise generated at the start position of a drawing stroke is reduced is enabled.

A coordinate input / detection device according to the present invention is a two-dimensional coordinate input / detection device which forms a plane or substantially a plane.
In a coordinate input / detection device which detects two-dimensional position coordinates of a pointing means which has designated a detection area based on a dip of a light intensity distribution detected by a light receiving means and outputs the same as drawing information, A zero-crossing point detecting means for detecting a zero-crossing point at which a gradient of a change per unit time of a dip position according to drawing based on a continuous instruction by the indicating means becomes zero, and the zero-crossing point detected by the zero-crossing point detecting means And a post-bending duration detecting means for detecting a time interval between the position where the dip disappears and a threshold storing means for storing a predetermined threshold value relating to a time interval between the zero cross point and the position where the dip disappears. A comparing means for comparing the time interval detected by the time detecting means with a predetermined threshold value stored in the threshold value storing means; And a fly / tome discriminating means for validating drawing information connecting the zero-cross point and the position where the dip disappears only when the time interval detected by the post-bending duration detecting means is larger than a predetermined threshold value. , Is provided.

Therefore, natural and different movements of the indicating means in the "bounce" portion and the "stop" portion of the drawing based on the continuous instruction by the indicating device such as a finger (the "bounce" portion and the "stop" portion are sharp) The point common to the point away from the coordinate input / detection area plane is common, but in the “bounce” part, the time interval between the zero cross point where the slope of the change per unit time of the dip position according to drawing becomes zero and the position where the dip disappears is Focusing on the "stop" part), the time interval between the zero-cross point and the position where the dip disappears is compared with a predetermined threshold value, and the drawing by the instruction means is performed according to the magnitude. By distinguishing between "bounce" and "stop", the input state can be recognized more appropriately, and reproduced image processing with reduced tailing or the like for the "stop" portion can be performed.

The method for discriminating fly / tome according to the thirty-fourth aspect of the present invention is characterized in that a two-dimensional coordinate input /
The coordinate input / detection device detects the two-dimensional position coordinates of the pointing means indicating the detection area based on the dip of the light intensity distribution detected by the light receiving means, and outputs it as drawing information. A method for discriminating a jump / stop between drawing and stopping based on a drawing, wherein a slope of a change per unit time of a dip position in the coordinate input / detection area according to drawing by the indicating means is zero. A zero-crossing point detection step of detecting a zero-crossing point, a post-bending duration detection step of detecting a time interval between the zero-crossing point and the position where the dip disappears, and a time interval between the zero-crossing point and the position where the dip disappears. A predetermined threshold value with respect to the detected time interval, and a comparing step of comparing the detected time interval with the time interval when the time interval is larger than the predetermined threshold value. Includes, and wings / Tome determination step to enable the drawing information connecting the position where the zero-cross point and a dip is extinguished.

Therefore, natural and different movements of the indicating means in the "bounce" portion and the "stop" portion of the drawing based on the continuous instruction by the indicating device such as a finger (the "bounce" portion and the "stop" portion are sharp) The point common to the point away from the coordinate input / detection area plane is common, but in the “bounce” part, the time interval between the zero cross point where the slope of the change per unit time of the dip position according to drawing becomes zero and the position where the dip disappears is Focusing on the "stop" part), the time interval between the zero-cross point and the position where the dip disappears is compared with a predetermined threshold value, and the drawing by the instruction means is performed according to the magnitude. By distinguishing between “bounce” and “stop”, the input state can be more appropriately recognized, and reproduction image processing with reduced tailing and the like for the “stop” portion can be performed.

The storage medium according to the thirty-fifth aspect of the present invention is a storage medium according to the present invention, wherein the two-dimensional position coordinates of the pointing means for designating a two-dimensional coordinate input / detection area that is flat or substantially flat are detected by the light receiving means. Is used for a coordinate input / detection device that detects based on the drawing and outputs the drawing information as drawing information.
A storage medium storing a computer-readable program for causing a computer to execute identification of “stop” and “stop”, the program comprising: a dip position in the coordinate input / detection area according to drawing by the indicating means. A zero-crossing point detection function for detecting a zero-crossing point at which the slope of change per unit time becomes zero, a post-bending duration detection function for detecting a time interval between the zero-crossing point and a position where the dip disappears, and the zero-crossing point. A predetermined threshold value for the time interval between the position where the dip has disappeared, and a comparison function for comparing the detected time interval,
Only when the time interval is larger than a predetermined threshold value, the computer is caused to execute a fly / toning discriminating function for validating drawing information connecting the zero cross point and the position where the dip has disappeared.

Therefore, natural and different movements of the pointing means in the "bounce" portion and the "stop" portion of the drawing based on the continuous instruction by the pointing device such as a finger (the "bounce" portion and the "stop" portion are sharp) The point common to the point away from the coordinate input / detection area plane is common, but in the “bounce” part, the time interval between the zero cross point where the slope of the change per unit time of the dip position according to drawing becomes zero and the position where the dip disappears is Focusing on the "stop" part), the time interval between the zero-cross point and the position where the dip disappears is compared with a predetermined threshold value, and the drawing by the instruction means is performed according to the magnitude. By distinguishing between "bounce" and "stop", the input state can be recognized more appropriately, and reproduced image processing with reduced tailing or the like for the "stop" portion can be performed.

[0083]

FIG. 1 shows a first embodiment of the present invention.
This will be described with reference to FIG. Here, FIG. 1 is an external perspective view schematically showing the electronic blackboard system 101.
As shown in FIG. 1, an electronic blackboard system 101, which is an information input system, includes a plasma display panel (PDP) 102, which is a display device, and a coordinate input / detection device 1, which is an information input device. The blackboard unit 104 and the device storage unit 103 are mainly configured. The device storage unit 103 includes a computer 105 such as a personal computer as a control device, a scanner 106 for reading an image of a document, a printer 107 for outputting image data to recording paper, and a video player 108.
(See FIG. 2). In addition, PDP
As 102, a large screen type that can be used as an electronic blackboard is used. The coordinate input / detection device 1 has a coordinate input / detection area 3 which is an information input area formed by a light beam projected in a fan shape, as will be described in detail later. By inserting an indicating means 4 (see FIG. 4) which functions as a light blocking means such as a fingertip of an operator, a pen, a pointing stick, etc. into the area 3 to block a light beam in the coordinate input / detection area 3, a CCD (Charge Coupled) is formed.
An optical coordinate input / detection device that detects an indicated position based on an image forming position on a light receiving element 13 (see FIG. 5) such as a device and enables input of characters and the like is applied.

PDP 102 and coordinate input / detection device 1
Is a coordinate input / display on the display surface 20 side of the PDP 102.
The detection device 1 is integrated so that it is located, and the PDP 1
The electronic blackboard section 104 is formed so that the coordinate input / detection area 3 of the coordinate input / detection device 1 substantially matches the display surface 20 of the display device 02. Thus, the electronic blackboard unit 104
Houses the PDP 102 and the coordinate input / detection device 1,
A display surface (display surface 20 of PDP 102) and a writing surface (coordinate input / detection area 3) of the electronic blackboard system 101 are configured.

Further, although not shown, the PD
The P102 is provided with a video input terminal and a speaker, and is connected to various information devices and AV devices such as a video player 108, a laser disk player, a DVD player, and a video camera, and uses the PDP 102 as a large-screen monitor. It is configured to be able to. The PDP 102 is also provided with adjustment means (not shown) for adjusting the display position, width, height, distortion, and the like of the PDP 102.

Next, the electrical connection of each part built in the electronic blackboard system 101 will be described with reference to FIG.
As shown in FIG. 2, the electronic blackboard system 101 connects a PDP 102, a scanner 106, a printer 107, and a video player 108 to a computer 105, respectively.
A computer 105 controls the entire system. Further, the computer 105 is connected to a controller 110 provided in the coordinate input / detection device 1 for calculating the position coordinates in the coordinate input / detection area 3 designated by the instruction means 4.
0, the coordinate input / detection device 1 is also a computer 105
It is connected to the. Also, the electronic blackboard system 101 can be connected to the network 111 via the computer 105. Data created by another computer connected to the network 111 can be displayed on the PDP 102, or data created by the electronic blackboard system 101 can be displayed. Can also be transferred to another computer.

Next, the computer 105 will be described. Here, FIG. 3 is a block diagram showing an electrical connection of each unit built in the computer 105. As shown in FIG. 3, the computer 105 includes a CPU 112 (Central Processing Unit) that controls the entire system, and a ROM (Read Only Memory) 113 that stores a startup program and the like.
And RA used as a work area of the CPU 112
M (Random Access Memory) 114, a keyboard 115 for inputting characters, numerical values, various instructions, etc., a mouse 116 for moving a cursor, selecting a range, etc., a hard disk 117, and a PDP 102 A graphics board 118 for controlling display of images on the PDP 102, a network card (or a modem) 119 for connecting to a network 111, a controller 110, a scanner 106,
Interface (I) for connecting the printer 107 and the like
/ F) 120 and a bus 121 for connecting the above components.
And

The hard disk 117 includes an operating system (OS) 122, a device driver 123 for operating the coordinate input / detection device 1 on the computer 105 via the controller 110, a drawing software, a word processor software, and a spreadsheet. Various application programs 124 such as software and presentation software are stored.

The computer 105 has an OS 12
2. A storage medium 126 storing various program codes (control programs) such as a device driver 123 and various application programs 124, that is, a floppy (registered trademark) disk, a hard disk, and an optical disk (CD-ROM, CD-R, CD-ROM). R / W, DVD-
ROM, DVD-RAM, etc.), magneto-optical disk (M
O), a program reading device 125 such as a floppy disk drive device, a CD-ROM drive device, and an MO drive device, which is a device for reading a program code stored in a memory card or the like.

Various application programs 124
Is executed by the CPU 112 under the control of the OS 122 which is started in response to turning on the power of the computer 105. For example, when the drawing software is activated by a predetermined operation of the keyboard 115 and the mouse 116, the P
A predetermined image based on the drawing software is displayed on the DP 102 via the graphics board 118. Further, the device driver 123 is also started up together with the OS 122, and enters a state where data can be input from the coordinate input / detection device 1 via the controller 110. When the user inserts the instruction means 4 into the coordinate input / detection area 3 of the coordinate input / detection device 1 while drawing software is activated and draws a character or a figure, the coordinate information is included in the description of the instruction means 4. Is input to the computer 105 as image data based on
The image is displayed as an overwrite image on the image on the screen displayed on the DP 102. More specifically, the CPU 112 of the computer 105 generates drawing information for drawing a line or a character based on the input image data, and combines the drawing information with the position coordinates based on the input coordinate information. Video memory provided in
(Not shown). After that, the graphics board 118 transmits the drawing information written in the video memory to the PDP 102 as an image signal, so that the same character as the character written by the user is displayed on the PDP 102.
Will be displayed. That is, the computer 105
Recognizes the coordinate input / detection device 1 as a pointing device such as the mouse 116, so that the computer 105 performs the same processing as when writing characters using the mouse 116 on drawing software. .

Next, the coordinate input / detection device 1 will be described in detail. First, the principle will be described with reference to FIG. The coordinate input / detection area 3 of the present embodiment, which is the internal space of the coordinate input / detection member 2 having a rectangular housing structure, forms a two-dimensional shape that is a plane (or almost a plane) and is electronically imaged. Is the display surface 20 of the PDP 102 described above. It is assumed that the coordinate input / detection area 3 is touched by the pointing means 4 which is an object functioning as a light blocking means, such as an operator's fingertip, pen, or pointing rod made of an optically opaque material. Detecting the coordinates of the indicating means 4 at this time means that the coordinates input /
This is the purpose of the detection device 1.

The upper ends of the coordinate input / detection area 3 (or
Light receiving / emitting means 5 is attached to both lower ends). From the light receiving / emitting means 5 toward the coordinate input / detection area 3, L1, L
A bundle of light beams (probe light) of 2, L3,..., Ln is irradiated. Actually, a fan-shaped plate-like light wave (luminous flux film) traveling along a plane parallel to the coordinate input plane spread from the point light source 6.
It is.

A retroreflective member (retroreflecting means) 7 is attached to the periphery of the coordinate input / detection area 3 with the retroreflective surface facing the center of the coordinate input / detection area 3.

The retroreflective member 7 is a member having a characteristic of reflecting incident light in the same direction regardless of the incident angle. For example, when attention is paid to one probe light 8 among the fan-shaped plate-like light waves emitted from the light receiving / emitting means 5, the probe light 8 is reflected by the retroreflective member 7 and receives and emits the same light path again as the retroreflected light 9. Proceed back to means 5. The light receiving / emitting means 5 is provided with a light receiving means described later, and for each of the probe lights L1 to Ln,
It can be determined whether the return light has returned to the light receiving means.

Now, the operator uses the finger (instruction means 4) to move the position P
Think about touching. At this time, the probe light 10 is blocked by the finger at the position P and does not reach the retroreflective member 7. Therefore, by detecting that the return light of the probe light 10 does not reach the light receiving / emitting means 5 and that the return light corresponding to the probe light 10 is not received, an instruction is given on the extension line (straight line L) of the probe light 10. It can be detected that the means 4 has been inserted. Similarly, the probe light 11 is also emitted from the light receiving / emitting means 5 provided at the upper right of FIG.
By detecting that the return light corresponding to No. 1 is not received, it is possible to detect that the indicating means 4 is inserted on the extension line (straight line R) of the probe light 11. If the straight line L and the straight line R can be obtained, the coordinates at which the pointing means 4 is inserted can be obtained by calculating the intersection coordinates of the point P by an operation based on the principle of triangulation.

Next, the structure of the light receiving / emitting means 5 and the probe light L
A mechanism for detecting which of the probe lights 1 to Ln has been blocked will be described. FIG. 5 schematically shows the internal structure of the light receiving / emitting means 5. FIG. 5 is a view of the light emitting / receiving unit 5 attached to the coordinate input surface of FIG. 4 when viewed from a direction perpendicular to the coordinate input / detection area 3. Here, for the sake of simplicity, the description will be made on a two-dimensional plane parallel to the coordinate input / detection area 3.

The schematic configuration includes a point light source 6, a condenser lens 12, and a light receiving element 13 which is a CCD (Charge Coupled Device) and functions as light receiving means. The point light source 6 emits light in a fan shape in a direction opposite to the light receiving element 13 when viewed from the light source 21 (see FIG. 9) which is a light emitting means. The fan-shaped light emitted from the point light source 6 is indicated by arrows 14 and 1
5. It is considered to be a set of probe lights traveling in other directions. The probe light traveling in the direction of arrow 14 is reflected by the retroreflective member 7 in the direction of arrow 16 and
And reaches the position 17 on the light receiving element 13. Also,
The probe light traveling in the direction of arrow 15 is reflected by the retroreflective member 7.
Is reflected in the direction of arrow 18 and passes through the condenser lens 12,
The light reaches the position 19 on the light receiving element 13. The light emitted from the point light source 6 and reflected by the retroreflective member 7 and returning along the same path reaches respective different positions on the light receiving elements 13 by the action of the condenser lens 12. Therefore,
When the probe light in which the indicating means 4 is inserted at a certain position in the coordinate input / detection area 3 is blocked, the light does not reach the point on the light receiving element 13 corresponding to the probe light.
Therefore, by examining the light intensity distribution on the light receiving element 13, it is possible to know which probe light is blocked.

The above operation will be described in detail with reference to FIG. FIG.
It is assumed that the light receiving element 13 is installed on the focal plane (focal length f) of the condenser lens 12. Light emitted from the point light source 6 toward the right side of FIG. 6 is reflected by the retroreflective member 7 and returns along the same path. Therefore, the light is condensed again at the position of the point light source 6. The center of the condenser lens 12 is installed so as to coincide with the position of the point light source. The return light returning from the retroreflective member 7 passes through the center of the condenser lens 12 and travels in a symmetrical path behind the lens (light receiving element side).

At this time, the light intensity distribution on the light receiving element 13 is considered. If the indicating means 4 is not inserted, the light receiving element 1
Although the light intensity distribution on the light receiving element 3 is substantially constant, as shown in FIG. A region where the light intensity is low occurs at the position of Dn, and the light receiving element 13
A dip appears in the shape of the intensity distribution of the light from. The position Dn where this dip appears corresponds to the emission / incidence angle θn of the blocked probe light, and by detecting Dn, θn can be known. That is, θn can be expressed as a function of Dn as follows: θn = arctan (Dn / f) (1) Here, .theta.n is replaced by .theta.nL, and Dn is replaced by DnL in the light receiving and emitting means 5 at the upper left of FIG.

Further, in FIG. 7, the angle .theta.L between the pointing means 4 and the coordinate input / detection area 3 is determined by the conversion coefficient g of the geometric relative positional relationship between the light receiving / emitting means 5 and the coordinate input / detection area 3. Is a function of DnL obtained by equation (1), θL = g (θnL) (2) where θnL = arctan (DnL / f) .

Similarly, for the light emitting / receiving means 5 at the upper right in FIG. 4, the symbol L in the above-mentioned formulas (1) and (2) is replaced with the symbol R, and the light emitting / receiving means 5 on the right and the coordinate input / detection area are set. ΘR = h (θnR) (3) where θnR = arctan (DnR / f) by the conversion coefficient h of the geometric relative positional relationship with 3. Can be.

Here, the mounting interval of the light receiving / emitting means 5 on the coordinate input / detection area 3 is represented by w shown in FIG. 7, and the origin coordinate is shown in FIG.
, The two-dimensional coordinates (x, y) of the point P indicated by the indicating means 4 on the coordinate input / detection area 3 are as follows: x = w · tan θnR / (tan θnL + tan θnR)... 4) y = w · tan θnL · tan θnR / (tan θL + tan θnR) (5) As described above, x and y can be expressed as functions of DnL and DnR. That is, the positions DnL and DnR of the dark spots on the light receiving element 13 on the left and right light emitting / receiving means 5 are detected, and the geometrical arrangement of the light receiving / emitting means 5 is taken into consideration. Two-dimensional coordinates can be detected.

Next, an example will be described in which the optical system described above is installed on the coordinate input / detection area 3, for example, on the surface of a display. FIG. 8 shows an example in which one of the left and right light emitting / receiving means 5 described in FIGS. 4 and 5 is installed on the display surface 20 of the PDP 102.

In FIG. 8, reference numeral 20 denotes a cross section of the display surface, which is viewed in the direction from the negative side to the positive side of the y-axis shown in FIG. That is, FIG. 8 mainly shows the xz direction, but the portion surrounded by the two-dot chain line shows the same object in another direction (x
-Y direction, yz direction).

The light emitting means of the light emitting / receiving means 5 will be described. An LD (Laser Diod) is used as a light source 21 as a light emitting means.
e: a semiconductor laser) that can narrow the spot to some extent is used.

Light emitted perpendicularly to the display surface 20 from the light source 21 is collimated by the condenser lens 22 only in the x direction. This collimation is later performed on the half mirror 23
This is for distributing the light as parallel light in the direction perpendicular to the display surface 20 after being turned back. After exiting the condenser lens 22, the light is condensed in the y direction in FIG.

These condenser lens groups (lenses 21 and 22)
By the operation of (4, 25), a linearly focused region is formed behind the focusing lens 25. Here, x
Insert a slit 26 that is elongated in the direction. That is, the linear secondary light source 6 is formed at the slit position. The light emitted from the secondary light source 6 is folded back by the half mirror 23 and does not spread in the vertical direction of the display surface 20 but is a parallel light. , Along the display surface 20. The light that has traveled is reflected by the retroreflective member 7 provided at the peripheral edge of the display, and returns to the half mirror 23 (arrow C) along a similar path. The light transmitted through the half mirror 23 travels parallel to the display surface 20, passes through the condenser lens 12, and enters the light receiving element 13.

At this time, the secondary light source 6 and the condenser lens 12 are both disposed at a distance D with respect to the half mirror 23 and have a conjugate positional relationship. Therefore, the secondary light source 6 corresponds to the point light source 6 in FIG. 6, and the condenser lens 12 corresponds to the lens 12 in FIG.

FIG. 9 is a block diagram showing a configuration of a control circuit for the light source 21 and the light receiving element 13. This control circuit is a light source 21
And the calculation of the output from the light receiving element 13. As shown in the figure, the control circuit includes a CPU (Ce
ROM (Read Only Memory) 3 for storing programs and data, centered on a central processing unit (31)
2. RAM (Random Access Memory) 33, interface driver 34 for connecting to a computer, A / D
An (Analog / Digital) converter 35, an LED driver 36, and a hard disk 37 for storing various program codes (control programs) are connected by a bus. Here, the CPU 31, the ROM 32, and the RAM 33
Constitutes a microcomputer as a computer.

Further, in such a microcomputer, a storage medium 39 storing various program codes (control programs), that is, a floppy disk, a hard disk, an optical disk (CD-ROM, CD-R,
CD-R / W, DVD-ROM, DVD-RAM, etc.), floppy disk drive, CD-ROM drive, MO A program reading device 40 such as a drive device is connected.

As a circuit for calculating the output from the light receiving element 13, an analog processing circuit 4 is connected to the output terminal of the light receiving element 13.
1 are connected as shown. The reflected light that has entered the light receiving element 13 is converted into analog image data having a voltage value according to the light intensity in the light receiving element 13 and output as an analog signal. This analog signal is processed by an analog processing circuit 41, and then converted into a digital signal by an A / D (Analog / Digital) converter 35, and is converted to a digital signal by the CPU 3.
Passed to 1. Thereafter, the instruction means 4 is provided by the CPU 31.
Is calculated.

This control circuit may be incorporated in the same housing as one of the light receiving / emitting means 5, or may be incorporated in a part of the display forming the coordinate input / detection area 3 as a separate housing. Also, interface driver 3
It is preferable to provide an output terminal for outputting the calculated coordinate data to a computer or the like via 4.

Various program codes (control programs) stored in the hard disk 37 or the storage medium 39
Are written into the RAM 33 in response to turning on the power to the coordinate input / detection device 1, and the various program codes (control programs) are executed.

Subsequently, based on the control program, the CPU
A description will be given of a characteristic function performed by the subroutine 31. Here, FIG. 10 is a block diagram functionally showing the coordinate input / detection device 1. As shown in FIG. 10, when the pointing means 4 such as a finger is inserted near the surface of the coordinate input / detection area 3 (when touched), the reflected light incident on the light receiving element 13 of the light receiving / emitting means 5 The digital signal generated by the A / D converter 35 in accordance with the above is sent to the coordinate detecting means 42 for detecting the two-dimensional coordinates on the coordinate input / detection area 3 of the pointing means 4 and the fly / toning identifying means 43. Output.

As described above, when the pointing means 4 such as a finger is inserted near the surface of the coordinate input / detection area 3, the coordinate detecting means 42 detects the coordinate input / detection area 3 of the pointing means 4.
Detect the two-dimensional coordinates above.

On the other hand, the splash / tome discriminating means 43 draws characters such as kanji and hiragana in Japanese in the vicinity of the surface of the coordinate input / detection area 3 in accordance with the continuous information input operation by the pointing means 4 such as a finger. , The "bounce" and "stop" of the character are detected. Here,
The fly / tome identification processing executed by the CPU 31 that implements the tome identification means 43 will be described below with reference to FIG.

As shown in FIG. 11, in step S1, a differentiation process is performed. Since “bounce” and “stop” at the time of drawing cause a bending point in the drawing locus, this bending point is detected by differentiating the time change of the coordinates, and the operation of “bounce” and “stop” is performed. It is possible to detect. In the following, the drawing of the Chinese character "3" including the "stop" portion and the drawing of the Chinese character "3" intentionally having a "bounce" portion at each stroke end will be referred to as "stop" or "bounce". Will be described in more detail.

Here, FIG. 12A is a graph showing the time change of the dip depth and the dip position in the light receiving element when the Chinese character “3” is drawn, and FIG. 12B is the end of each stroke of the Chinese character “3”. 7 is a graph showing a time change of a dip depth and a dip position in a light receiving element when an image in which a “bounce” portion is provided is drawn. Point A shown in FIGS. 12A and 12B is the starting point of the second stroke in the drawing of the kanji character “3” and the drawing of the kanji character “3” having a “bounce” portion at each stroke end. The point is the end point of the second stroke. That is, the point B is a “stop” portion in the drawing of the kanji “3”, and is a “bounce” portion in the drawing of the kanji “3” provided with a “bounce” portion at each stroke end. Here, when the point B in the drawing of the kanji “3” and the drawing of the kanji “3” having a “bounce” portion at each stroke end is enlarged, as shown in FIG. Regardless of each operation, the dip depth changes abruptly at the end of the drawing between the "bounce" portion and the "bounce" portion, and there is no difference in the disappearance time between the "stop" portion and the "bounce" portion. On the other hand, as shown in FIG. 13, it can be seen that there is a difference in the change of the dip position between the “stop” portion and the “bounce” portion. Therefore, when the time change of the dip depth and the dip position is differentiated and grasped as a change amount per unit time, a graph shown in FIG. 14 is obtained.
Here, point C shown in FIGS. 14A and 14B is a zero cross point of the dip position change derivative, and point D is a peak value of the dip depth change derivative. That is, the zero-cross point is a point at which the sign of the differential curve changes as shown in FIGS. 14A and 14B (that is, a point at which the slope of the change becomes zero).
, And is a bending point based on the action of “bounce” or “stop”. In addition, the point D, which is the peak value of the dip depth change derivative, is constant at the time of drawing because the dip depth is constant.
This is the position where the dip disappears because the pointing means 4 is separated from the coordinate input / detection area 3.

The above-mentioned bending point may be detected by at least one of the light receiving / emitting means 5 mounted on both upper ends (or lower both ends) of the coordinate input / detection area 3. As described above, it is sufficient that at least one of the light receiving / emitting means 5 detects the bending point.
For the following reasons. Since drawing noise such as unintended “bounce” may appear in any direction within the coordinate input / detection area 3, all unintended “dip positions” of the light receiving element 13 of one of the light receiving / emitting means 5 are not included. This is because it may not be possible to delete “bounce”. For example,
If the “bounce” of the stroke is parallel or nearly parallel to the optical axis of the light receiving and emitting means 13 of one of the light receiving and emitting means 5, the dip position does not move on the light receiving element 13 of the light receiving and emitting means 5. However, the light receiving element 1 of the other light receiving / emitting means 5
No. 3 is because the light axis of the light receiving element 13 of one of the light receiving and emitting means 5 is substantially perpendicular to the light axis, so that the dip position always changes. That is, the light receiving elements 13 of both the light receiving and emitting units 5 are observed, and the light receiving elements 13 of at least one of the light receiving and emitting units 5 are observed.
By evaluating "bounce" when a zero-cross point occurs due to a change in the dip position, unintentional "bounce" can be surely suppressed without missing the evaluation.

The differentiation process (step S1) is continued until it is determined that the zero cross point is detected (step S1).
Y of 2) is repeated. Therefore, steps S1 to S1
In S2, the function of the zero-cross point detection means is executed.

When it is determined that the zero cross point has been detected (Y in step S2), the process proceeds to step S3, and a post-bend duration detecting process for detecting the post-bend duration T is executed. Here, the post-bending duration T corresponds to the post-bending duration of the point C which is the zero cross point of the dip position change derivative and the point D which is the peak value of the dip depth change derivative (FIG. 14). The reason for detecting such a post-bending duration T in step S3 is as shown in FIG.
As can be seen from the figure, since the drawing shape by the "bounce" operation is longer than the pseudo "bounce" drawing shape generated at the time of the "stop" operation, its duration is also longer, By detecting the duration T after the bending, it is possible to determine whether the operation is the “bounce” operation or the “stop” operation. Here, the function of the post-bending duration detecting means is executed.

As shown in FIG. 14 (b), although the "bounce" portion is provided at each stroke end of the kanji "3", the "bounce" operation occurs when the "bounce" is drawn. . In the operation of the “delay”, the area where the differential curve of the dip position of the portion indicated by the point C which is the zero cross point becomes “0” does not become a point, but the “0” time of about 20 msec is maintained. Line is detected. This is because the pointing means 4 such as a finger stops at the point C for a moment when drawing the “bounce” portion. This lasting portion is the so-called “tame”. Therefore, when such an operation of “delay” is detected, the point C, which is the zero-cross point, is arbitrarily set within a range where the time “0” is maintained.

In the following step S4, step S
After bending detected in 3 duration is compared with T and the threshold T _0. Here, the function of the comparing means is executed. The threshold value T ₀ is an intermediate value between the average duration after bending by the “bounce” operation and the average duration after bending by the “stop” operation, and is stored in the ROM 32, for example. I have. That is, the ROM 32 functions as a threshold storage unit.

If the post-bending duration T is greater than the threshold value T ₀ , that is, if “T> T ₀ ” (Y in step S 4), the process proceeds to step S 5, where the coordinate detection means 42
Or plotting the detected two-dimensional coordinates whether criteria become plot flag P _F to ON in (P F = ₁₎
To end the processing. On the other hand, if after bending duration T is less than the threshold value _{T 0,} that is, (N in step S4) _"T ≦ T _0" when the A was, the process proceeds to step S6, OFF plots flag _{P F} (P _F = 0)
The process ends. Therefore, in steps S5 to S6, the function of the fly / toning discriminating means is executed.

As shown in FIG. 10, a drawing control means 44 is provided downstream of the coordinate detecting means 42 and the fly / toning identifying means 43. This drawing control means 44
Is to determine whether to output to the computer on the basis of the two-dimensional coordinates detected in the coordinate detection unit 42 in the plot flag P _F. That is, only when the plot flag _{P F} is ON _(P F = 1), the coordinate detection means 4
2 is output to the computer as drawing information (input information), so that the two-dimensional coordinates relating to a pseudo “bounce” which is a tail generated at the time of the “stop” operation are drawn information. Will not be output to the computer.

Here, the "bounce" portion or the "stop" portion of the drawing according to the continuous information input operation by the pointing means 4 such as a finger.
The natural and different movements of the indicating means 4 in the portion (the "bounce" portion and the "stop" portion are common in that they steeply move away from the coordinate input / detection area 3, but in the "bounce" portion, the dip position corresponding to the drawing Focusing on the time interval between the zero-cross point where the slope of the change per unit time becomes zero and the position where the dip disappears becomes longer than the "stop" portion), the time interval between the zero-cross point and the position where the dip disappears Is compared with a predetermined threshold value set in advance, and it is possible to more appropriately recognize the input state by identifying whether the drawing by the indicating means 4 is “bounce” or “stop” according to the magnitude thereof, Reproduction image processing in which tailing or the like for the “stop” portion is reduced is enabled.

A second embodiment of the present invention will be described with reference to FIGS. The same parts as those described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. The coordinate input / detection device 1 of the present embodiment differs from the first embodiment only in the method of detecting “bounce” and “stop” of a character drawn based on a continuous instruction by the instruction means 4. Are different.

FIG. 15 is a block diagram functionally showing the coordinate input / detection device 1. As shown in FIG. As shown in FIG. 15, when the pointing means 4 such as a finger is inserted near the surface of the coordinate input / detection area 3 (when touched), the reflected light incident on the light receiving element 13 of the light receiving / emitting means 5 The digital signal generated by the A / D converter 35 in response to the coordinate detection means 42 for detecting two-dimensional coordinates on the coordinate input / detection area 3 of the instruction means 4 and the fly / tome discriminating means 43 Output.

As described above, when the pointing means 4 such as a finger is inserted near the surface of the coordinate input / detection area 3, the coordinate detecting means 42 detects the coordinate input / detection area 3 of the pointing means 4.
Detect the two-dimensional coordinates above.

On the other hand, the splash / tome discriminating means 43 draws characters such as kanji and hiragana in Japanese in the vicinity of the surface of the coordinate input / detection area 3 according to the continuous information input operation by the pointing means 4 such as a finger. , "Bounce" and "stop" of the character are detected. As shown in FIG. 15, the fly / tome discriminating means 43 includes a first fly / tome discriminating means 43 a and a second fly / tome discriminating means 43 b which are independent for each light receiving / emitting means 5.

Here, the fly / tome identification processing executed by the CPU 31 that implements the fly / tome identification means 43 will be described below with reference to FIG. As shown in FIG. 16, first, time-series data of dip positions is sequentially acquired based on a digital signal generated by the A / D converter 35 (step S31). In the following description, the processing will not be described separately for each light emitting / receiving means 5, but the processing in the first splash / tome discriminating means 43a for one light receiving / emitting means 5 will be described.

In the following step S32, a differentiation process is performed. Since "bounce" and "stop" at the time of drawing cause a bending point in the drawing locus, this bending point is detected by differentiating the time change of coordinates,
"Bounce" and "stop" actions can be detected. In the following, the kanji "san" including the "stop" part
The operation detection of “stop” and “bounce” will be described in more detail by taking the drawing stroke of “1” as an example.

FIG. 17A is a graph showing coordinate data obtained when the Chinese character "3" is drawn.
(B) is a graph showing the time change of the dip position corresponding to the solid line part of (a). FIG. 17A and FIG.
Points A and B shown in (b) are so-called "bounce" portions. When the acquired time change of the dip position is differentiated and captured as a change amount per unit time, a graph shown in FIG. 17C is obtained. Note that a simple difference or a smoothed derivative is used for the differentiation process. As shown in FIG. 17C, the direction of the coordinate change of the differentiated waveform changes at points A and B. That is, as shown in FIG. 17C, the positions corresponding to the points A and B are points where the signs of the differential curves change (that is, points where the gradient of the change becomes zero). The position where this sign changes is indicated by a white circle (（) in FIG. This part is the zero cross point.

The differentiation process as described above (step S32)
Are repeated until it is determined that a zero cross point has been detected (Y in step S33). Therefore, in steps S31 to S33, the function of the zero-cross point detecting means is executed.

If it is determined that the zero cross point has been detected (Y in step S33), the zero cross point is set to 1
It is determined in steps S34 and S35 whether the zero-cross point appears first in the stroke or the zero-cross point appears last in one stroke.

If the detected zero cross point is the first zero cross point in one stroke (Y in step S34), the time interval T1 between the stroke start point and the zero cross point is detected (step S3).
6). Here, the time interval T1 between the stroke start point and the zero-cross point is detected because the drawing shape by the “bounce” operation is smaller than the pseudo “bounce” drawing shape generated at the time of the “stop” operation. Because the length is long, the time interval between the stroke start point and the zero cross point is also long, so by detecting this time interval, it is possible to determine whether it is a “bounce” operation or a “stop” operation. is there. Here, the function of the time interval detecting means is executed.

In the following step S37, the time interval T1 detected in step S36 is compared with a threshold value TH1. Here, the function of the comparing means is executed. The threshold value TH1 is stored in, for example, the ROM 32. That is, the ROM 32 functions as a threshold storage unit.

If the time interval T1 is greater than the threshold value TH1, that is, if “T1> TH1” (Y in step S37), the process proceeds to step S38, where the two-dimensional coordinates detected by the coordinate detecting means 42 are detected. plot the criterion for determining whether to become plot flag P _F to ON (P _F
= 1), and the process returns to step S31. On the other hand, when the time interval T1 is smaller than the threshold value TH1, that is, "T1
≤ TH1 "(N in step S37),
The process proceeds to step S39, OFF plots flag _{P F}
After (P _F = 0), the process returns to step S31. That is, when the time interval T1 is smaller than the threshold value TH1,
The portion from the stroke start point to the first zero cross point is not drawn or discarded as stroke data.

If the detected zero cross point is the last zero cross point in one stroke (Y in step S35), a time interval T2 between the stroke end point and the zero cross point is detected (step S35). Step S
40). Here, the time interval T1 between the stroke start point and the zero-cross point is detected because the drawing shape by the “bounce” operation is a pseudo “bounce” generated at the time of the “stop” operation.
Since the shape is longer than the drawing shape of, the time interval between the stroke start point and the zero-cross point is also longer,
This is because detecting this time interval makes it possible to determine whether the operation is a “bounce” operation or a “stop” operation. Here, the function of the time interval detecting means is executed.

In the following step S21, the time interval T2 detected in step S40 is compared with a threshold value TH2. Here, the function of the comparing means is executed. The threshold value TH2 is stored in, for example, the ROM 32. That is, the ROM 32 functions as a threshold storage unit.

If the time interval T2 is larger than the threshold value TH2, that is, if “T2> TH2” (Y in step S41), the process proceeds to step S42, where the two-dimensional coordinates detected by the coordinate detecting means 42 are detected. plot the criterion for determining whether to become plot flag P _F to ON (P _F
= 1), and the process ends. On the other hand, when the time interval T2 is smaller than the threshold value TH2, that is, “T2 ≦ TH
If the was the 2 "(N in step S41), the process proceeds to step S43, the plot flag _{P F} OFF _{(P F} =
0), and the process ends. That is, the time interval T2
Is smaller than the threshold value TH2, the portion from the last zero-cross point to the stroke end point is not drawn or is discarded as stroke data.

When drawing an intended “bounce”, a “tame” operation may occur as a human writing operation. The operation of this “delay” is that the region where the differential curve of the portion that is the zero crossing point is “0” does not become a point,
It is detected as a line in which the time “0” lasts. This is because the pointing means 4 such as a finger stops at the zero-cross point for a moment when drawing the “bounce” portion. This lasting portion is the so-called “tame”. Therefore, when such an operation of “delay” is detected, the zero-cross point is arbitrarily set within a range where the time “0” continues.
In processing, it is clearer to use the final end of the period in which this “0” is maintained as the zero-cross point, so that the difference between the intended “bounce” and the unintended “bounce” becomes clearer. You can also choose the starting point.

Here, a supplementary explanation will be given of the splash suppression algorithm at the stroke start and end points with reference to FIG. FIG. 18 shows the relationship between the dip position on the light receiving element 13 and the time during stroke drawing. In FIG. 18, white circles (（) indicated by S ₁ , S ₂ ,... _SN indicate dip positions on the light receiving element 13 at respective times. That is, these S ₁ , S ₂ ,... S
_The column indicated by _N is one continuous stroke. Assuming that dip positions on the light receiving element 13 are sampled at equal intervals in this one stroke, S ₁ , S ₂ ,.
Time intervals of _SN are assumed to be equal. The number of samples read during one stroke is N
And S ₁ is the starting point of the stroke, and S ₂ ,
The stroke advances as S ₃ ,..., _SN . Where n
Th derivative d _n at the dip position S _n of is defined by the equation (6) shown below.

[0144]

(Equation 1)

[0145] Also, the parameters n th dip positions indicating whether the zero-cross point to Z _n. Z _n is assumed to take the logical value of Equation (7) shown below. In the initial state, _Zn is all “false”.

[0146]

(Equation 2)

[0147] Furthermore, defining the parameter p _n indicating whether a valid point the n-th sampling point as a stroke (point to be drawn) as shown in Equation (8) below. In the initial state, _pn is all “false”.

[0148]

(Equation 3)

Further, as described above, the threshold value for unintended “bounce” detection at the stroke start point is T1 and the threshold value for unintended “bounce” detection at the stroke end point is T2. In addition, the parameter that stores the zero cross point that appears at the beginning of the stroke is “ztop”, and the parameter that stores the zero cross point that appears at the end of the stroke is “ztail”. Note that the initial values of “ztop” and “ztail” are “ztop” = “ztail” = 0.

Next, the operation will be described. First, S _n (n read sequentially as the stroke drawing progresses
= 1, 2,..., N), d _n (n = 2, 3,
.., N) and Zn _-1 (n = 3, 4,...,
N) is calculated. Hereinafter, description will be made in each case. 1. If n-1 <T1, and the stroke is continued If "n-1 = r" and "Zn _-1 =" true "", and if "ztop" = 0, , Assumed to be the zero crossing point that appeared at the beginning of the stroke, and “ztop” = r
And 2. n-1 <T1, and the p ₁ a ~p _n-1 "true" if the stroke is completed. 3. If the case of n-1 = T1 "" ztop "= _0", and the _{p 1 ~p n-1 "true} ". Also, unless “ztop” = 0, p _ztop
To _pn-1 are "true". 4. T1 <n-1 ≦ T1 + T2 and, when the stroke continues, "n-1 = s' if becomes" _{Z n-1} = "true", "the value of" ztail "" _{Z n- 1} is updated with “n−1” when “true”. 5. If T1 <n-1 ≦ T1 + T2 and the stroke has ended, the processing ends. 6. When T1 + T2 <n-1 and the stroke is continued When "n-1 = s" and "Zn _-1 =" true "", the value of "ztail" is changed to "Zn _-1 = It is updated with "n-1" at the time of "true". Also, _{pn-1- T2 is set} to "true". 7. When T1 + T2 <n−1 and the stroke is completed If ““ ztail ”= 0”, _{pn−1−T2 to PN} are set to “t”.
rue ”, and if“ “ztop” = 0 ”, p
_{n-1−T2 to p ztail} are _set to “true”. As described above, the splash suppression at the stroke start point and the stroke end point is executed.

As shown in FIG. 15, a drawing control means 44 is provided at a stage subsequent to the coordinate detecting means 42 and the fly / tome discriminating means 43. This drawing control means 44
Is to determine whether to output to the computer on the basis of the two-dimensional coordinates detected in the coordinate detection unit 42 in the plot flag P _F. That is, only when the plot flag _{P F} is ON _(P F = 1), the coordinate detecting unit 5
Since the two-dimensional coordinates detected in step 1 are output to the computer as drawing information, the two-dimensional coordinates relating to the pseudo "bounce" which is a tail generated during the "stop" operation are output to the computer as drawing information. It will not be done. FIG. 19 shows an example in which the drawing data between the start point and the end point and the zero-cross point is determined to be “invalid”, and the unintended “bounce” occurring at the points A and B is deleted.

As described above, the fly / toning discriminating process is performed independently for each light receiving / emitting means 5 for the following reason. Since drawing noise such as unintentional “bounce” may appear in any direction in the coordinate input / detection area 3, only unintentional “dip position” of one of the light emitting / receiving means 5 will cause all unintended “noise”. This is because it may not be possible to delete “bounce”. For example, if the “bounce” of the stroke is parallel or nearly parallel to the optical axis of the light receiving element 13 of one of the light receiving and emitting means 5, the dip position does not move on that light receiving element 13. In this case, even though unintended “bounce” has occurred, the above-mentioned zero cross point cannot be found, so that “bounce” cannot be evaluated even, and the suppression of “bounce” is missed. However, in this case, since the light receiving element 13 of the other light receiving / emitting means 5 has a light axis substantially orthogonal to the light receiving element 13 of the one light receiving / emitting means 5,
A change in the dip position always occurs. In other words, the fly / toning discrimination process is performed independently for each light emitting / receiving means 5, and when at least one of the light emitting / receiving means 5 has a zero-cross point, "bounce" is evaluated. This makes it possible to surely suppress unintended “bounce” without missing the evaluation.

Here, the "bounce" portion or the "stop" portion of the drawing in response to the continuous information input operation by the pointing means 4 such as a finger.
The natural and different movements of the indicating means 4 in the portion (the “bounce” portion and the “stop” portion are common in that they steeply move away from the coordinate input / detection area 3 surface, but the “bounce” portion has a dip position corresponding to the drawing. The time interval between the zero-cross point where the slope of the change per unit time becomes zero and the drawing end position is longer than the "stop" portion), and the time interval between the zero-cross point and the drawing end position is By comparing with a predetermined threshold value set in advance and identifying whether the drawing by the instruction means is “bounce” or “stop” according to the magnitude, the input state can be more appropriately recognized, and unintended Reproduced image processing in which tailing or the like for the "stop" portion, which is a "bounce", can be reduced.

The time interval between the zero-crossing point at which the inclination of the change in the dip position per unit time according to the drawing becomes zero and the drawing start position is compared with a predetermined threshold value. The input state is recognized more appropriately by identifying whether or not the drawing by the indicating means 4 is the beard-like drawing noise generated at the start position of the drawing stroke depending on how the pointing means 4 such as a finger lands according to As a result, it is possible to perform a reconstructed image processing in which beard-like drawing noise generated at the start position of a drawing stroke is reduced.

A third embodiment of the present invention will be described with reference to FIGS. The same parts as those described in the first embodiment are denoted by the same reference numerals, and description thereof is omitted. According to the coordinate input / detection device 50 of the present embodiment, only the method of detecting “bounce” or “stop” of a character drawn based on a continuous instruction by the instruction means 4 is the coordinate of the first embodiment. The input / detection device 1 is different.

FIG. 20 is a block diagram functionally showing the coordinate input / detection device 50. As shown in FIG. As shown in FIG. 20, when the pointing means 4 such as a finger is inserted near the surface of the coordinate input / detection area 3 (when touched), the light emitting / receiving means 5 is used.
The digital signal generated by the A / D converter 35 in response to the reflected light that has entered the light receiving element 13 is transmitted to the coordinate detection means 51 for detecting two-dimensional coordinates on the coordinate input / detection area 3 of the instruction means 4. Output.

The coordinate detecting means 51 performs the coordinate input /
Similar to the coordinate detecting means 42 of the detecting device 1, when the pointing means 4 such as a finger is inserted near the surface of the coordinate input / detecting area 3, the two-dimensional coordinates of the pointing means 4 on the coordinate input / detecting area 3 are displayed. Detect coordinates. The time-series data of the two-dimensional coordinate data detected by the coordinate detecting means 51 is
It is output to the tome identification means 52. The time-series data of such two-dimensional coordinate data is generally represented as a component of an orthogonal coordinate system, for example, (x1, y1), (x2, y2),.
It is a set of each component of the x coordinate and the y coordinate as shown in.

The splash / tome discriminating means 52 draws characters such as Japanese kanji and hiragana in the vicinity of the surface of the coordinate input / detection area 3 in accordance with a continuous information input operation by the pointing means 4 such as a finger. The "bounce" and "stop" of the character are detected. As shown in FIG. 20, the fly / tome discriminating means 52 includes independent x-coordinate fly / tome discriminating means 52a and y-coordinate fly / tome discriminating means 5 for each of the x and y components of the two-dimensional coordinate data.
2b.

Here, the fly / tome identification processing executed by the CPU 31 that implements the fly / tome identification means 52 will be described below with reference to FIG. As shown in FIG. 21, first, time-series data of the two-dimensional coordinate data detected by the coordinate detecting means 51 is sequentially obtained (step S11). Note that in the following description, the processing is referred to as x and
The processing in the x-coordinate fly / tome discriminating means 52a for one component, for example, the x component, without being described separately for the y component, will be described.

In the following step S12, a differentiation process is executed. Since "bounce" and "stop" at the time of drawing cause a bending point in the drawing locus, this bending point is detected by differentiating the time change of coordinates,
"Bounce" and "stop" actions can be detected. In the following, the kanji "san" including the "stop" part
The operation detection of “stop” and “bounce” will be described in more detail by taking the drawing stroke of “1” as an example.

Here, FIG. 22A is a graph showing coordinate data obtained when the Chinese character “3” is drawn.
(B) is a graph showing the time change of the x coordinate corresponding to the solid line part of (a). Points A and B shown in FIGS. 22A and 22B are so-called “bounce” portions. When the time change of the x component of the acquired coordinates is differentiated and grasped as a change amount per unit time, a graph shown in FIG. 22C is obtained. Note that a simple difference or a smoothed derivative is used for the differentiation process. The differentiated waveform is shown in FIG.
As shown in (c), the direction of the coordinate change is changed at point A and point B. That is, as shown in FIG.
The positions corresponding to the point and the point B are points where the sign of the differential curve changes (that is, a point where the gradient of the change becomes zero). The position at which this sign changes is indicated by a white circle (○) in FIG. This part is the zero cross point.

Differentiation processing as described above (step S12)
Are repeated until it is determined that the zero cross point has been detected (Y in step S13). Therefore, in steps S11 to S13, the function of the zero-crossing point detecting means is executed.

When it is determined that a zero cross point has been detected (Y in step S13), the zero cross point is set to 1
It is determined in steps S14 and S15 whether the zero-cross point appears first in the stroke or the zero-cross point appears last in one stroke.

If the detected zero cross point is the first zero cross point in one stroke (Y in step S14), a time interval T1 between the stroke start point and the zero cross point is detected (step S1).
6). Here, the time interval T1 between the stroke start point and the zero-cross point is detected because the drawing shape by the “bounce” operation is smaller than the pseudo “bounce” drawing shape generated at the time of the “stop” operation. Because the length is long, the time interval between the stroke start point and the zero cross point is also long, so by detecting this time interval, it is possible to determine whether it is a “bounce” operation or a “stop” operation. is there. Here, the function of the time interval detecting means is executed.

In the following step S17, the time interval T1 detected in step S16 is compared with a threshold value TH1. Here, the function of the comparing means is executed. The threshold value TH1 is stored in, for example, the ROM 32. That is, the ROM 32 functions as a threshold storage unit.

If the time interval T1 is larger than the threshold value TH1, that is, if “T1> TH1” (Y in step S17), the process proceeds to step S18, where the two-dimensional coordinates detected by the coordinate detecting means 51 are detected. plot the criterion for determining whether to become plot flag P _F to ON (P _F
= 1), and the process returns to step S11. On the other hand, when the time interval T1 is smaller than the threshold value TH1, that is, "T1
≤ TH1 "(N in step S17),
The process proceeds to step S19, OFF plots flag _{P F}
After (P _F = 0), the process returns to step S11. That is, when the time interval T1 is smaller than the threshold value TH1,
The portion from the stroke start point to the first zero cross point is not drawn or discarded as stroke data.

If the detected zero cross point is the last zero cross point in one stroke (Y in step S15), a time interval T2 between the stroke end point and the zero cross point is detected (step S15). Step S
20). Here, the time interval T1 between the stroke start point and the zero-cross point is detected because the drawing shape by the “bounce” operation is a pseudo “bounce” generated at the time of the “stop” operation.
Since the shape is longer than the drawing shape of, the time interval between the stroke start point and the zero-cross point is also longer,
This is because detecting this time interval makes it possible to determine whether the operation is a “bounce” operation or a “stop” operation. Here, the function of the time interval detecting means is executed.

In the following step S21, the time interval T2 detected in step S20 is compared with a threshold value TH2. Here, the function of the comparing means is executed. The threshold value TH2 is stored in, for example, the ROM 32. That is, the ROM 32 functions as a threshold storage unit.

If the time interval T2 is larger than the threshold value TH2, that is, if “T2> TH2” (Y in step S21), the process proceeds to step S22, where the two-dimensional coordinates detected by the coordinate detecting means 51 are detected. plot the criterion for determining whether to become plot flag P _F to ON (P _F
= 1), and the process ends. On the other hand, when the time interval T2 is smaller than the threshold value TH2, that is, “T2 ≦ TH
If the it was the 2 "(N in step S21), and proceeds to step S23, the plot flag _{P F} OFF _{(P F} =
0), and the process ends. That is, the time interval T2
Is smaller than the threshold value TH2, the portion from the last zero-cross point to the stroke end point is not drawn or is discarded as stroke data.

When drawing an intended "bounce", a "tame" operation may occur as a human writing operation. The operation of this “delay” is that the region where the differential curve of the portion that is the zero crossing point is “0” does not become a point,
It is detected as a line in which the time “0” lasts. This is because the pointing means 4 such as a finger stops at the zero-cross point for a moment when drawing the “bounce” portion. This lasting portion is the so-called “tame”. Therefore, when such an operation of “delay” is detected, the zero-cross point is arbitrarily set within a range where the time “0” continues.
In processing, it is clearer to use the final end of the period in which this “0” is maintained as the zero-cross point, so that the difference between the intended “bounce” and the unintended “bounce” becomes clearer. You can also choose the starting point.

Here, at the stroke start and end points,
Supplementary explanation on the energy suppression algorithm with reference to FIG.
I will tell. FIG. 23 shows a coordinate position when drawing a stroke.
It shows the relationship between time and time. In FIG. 23, S₁,
S₂, ... S_NThe white circles (○) shown at
Represents the coordinate position. That is, these S₁,
S ₂, ... S_NIs a continuous stroke
It is. In this one stroke, the coordinate position is
Assuming sampling, S₁, S₂, ... S_Ntime
The interval is assumed to be equal. One stroke
It is assumed that the number of samplings to be read in is N.
Also, S₁Is the starting point of the stroke and S₂, S₃,
・ S_NAnd the stroke goes on. Where the n th
Marking position S_nThe derivative d at_nIs given by the following equation (6)
Is defined as

[0172]

(Equation 4)

[0173] Also, the parameters n-th coordinate position indicates whether the zero-cross point to Z _n. Z _n is assumed to take the logical value of Equation (7) shown below. In the initial state, _Zn is all “false”.

[0174]

(Equation 5)

[0175] Furthermore, defining the parameter p _n indicating whether a valid point the n-th sampling point as a stroke (point to be drawn) as shown in Equation (8) below. In the initial state, _pn is all “false”.

[0176]

(Equation 6)

Further, as described above, the threshold value for unintended "bounce" detection at the stroke start point is T1, and the threshold value for unintended "bounce" detection at the stroke end point is T2. In addition, the parameter that stores the zero cross point that appears at the beginning of the stroke is “ztop”, and the parameter that stores the zero cross point that appears at the end of the stroke is “ztail”. Note that the initial values of “ztop” and “ztail” are “ztop” = “ztail” = 0.

Next, the operation will be described. First, S _n (n read sequentially as the stroke drawing progresses
= 1, 2,..., N), d _n (n = 2, 3,
.., N) and Zn _-1 (n = 3, 4,...,
N) is calculated. Hereinafter, description will be made in each case. 1. If n-1 <T1, and the stroke is continued If "n-1 = r" and "Zn _-1 =" true "", and if "ztop" = 0, , Assumed to be the zero crossing point that appeared at the beginning of the stroke, and “ztop” = r
And 2. n-1 <T1, and the p ₁ a ~p _n-1 "true" if the stroke is completed. 3. If the case of n-1 = T1 "" ztop "= _0", and the _{p 1 ~p n-1 "true} ". Also, unless “ztop” = 0, p _ztop
To _pn-1 are "true". 4. T1 <n-1 ≦ T1 + T2 and, when the stroke continues, "n-1 = s' if becomes" _{Z n-1} = "true", "the value of" ztail "" _{Z n- 1} is updated with “n−1” when “true”. 5. If T1 <n-1 ≦ T1 + T2 and the stroke has ended, the processing ends. 6. When T1 + T2 <n-1 and the stroke is continued When "n-1 = s" and "Zn _-1 =" true "", the value of "ztail" is changed to "Zn _-1 = It is updated with "n-1" at the time of "true". Also, _{pn-1- T2 is set} to "true". 7. When T1 + T2 <n−1 and the stroke is completed If ““ ztail ”= 0”, _{pn−1−T2 to PN} are set to “t”.
rue ”, and if“ “ztop” = 0 ”, p
_{n-1−T2 to p ztail} are _set to “true”. As described above, the splash suppression at the stroke start point and the stroke end point is executed.

As shown in FIG. 20, a drawing control means 53 is provided at the subsequent stage of the fly / tome discriminating means 52. The drawing control unit 53 is for determining whether to output to the computer on the basis of the two-dimensional coordinates detected in the coordinate detection unit 51 in the plot flag P _F. That is, only when the plot flag P _F is ON (P F = _1), it means that outputs the two-dimensional coordinates detected in the coordinate detection unit 51 as the drawing information to a computer, generated during the operation of the "stop" The two-dimensional coordinates relating to the pseudo “bounce” as the tail are not output to the computer as the drawing information. FIG. 24 shows that the drawing data between the start point and the end point and the zero-cross point is determined to be “invalid”, and the unintended “bounce” generated at the points A and B
Is an example of having been deleted.

As described above, the fly / tongue discriminating process is independently performed on the x component and the y component of the two-dimensional coordinate data for the following reasons. Drawing noise such as unintended “bounce” is caused by the coordinate input / detection area 3
This is because there is a possibility that the signal may come out in any direction, so that it is not always possible to eliminate all unintended “bounces” by differentiating only one component. For example, if the x-coordinate is taken in the right direction and the y-coordinate is taken in the upward direction, and if “bounce” occurs from the upper right to the lower left at the end when drawing from the upper left to the lower right, the derivative of the y component Then, even if this changes discontinuously, the sign does not change. In this case, even though unintended “bounce” has occurred, the above-mentioned zero cross point cannot be found, so that “bounce” cannot be evaluated even, and the suppression of “bounce” is missed. However, in this case, the derivative of the x component changes from plus to minus. Therefore, when a zero cross point occurs in at least one of the x component and the y component, the “bounce” is evaluated. It is possible to reliably suppress unintended “bounce” without missing the evaluation.

Here, the “bounce” portion or the “stop” portion of the drawing in response to the continuous information input operation by the pointing means 4 such as a finger.
The natural and different movements of the indicating means 4 in the portions (the "bounce" portion and the "stop" portion are common in that they steeply move away from the coordinate input / detection area 3 surface, but the "bounce" portion is detected in accordance with the drawing. (The time interval between the zero-cross point where the slope of the change per unit time of the two-dimensional position coordinate component per unit time is zero and the end position of drawing is longer than that at the "stop" part.) By comparing the time interval with the position with a predetermined threshold value set in advance, and identifying whether the drawing by the indicating means 4 is “bounce” or “stop” according to the magnitude of the difference, input more appropriately. The state can be recognized, and the reproduction image processing in which the tailing or the like for the “stop” portion that is an unintended “bounce” can be reduced can be performed.

Further, a time interval between a zero-cross point at which the gradient of a change per unit time of a two-dimensional position coordinate component detected according to drawing is zero and a drawing start position, a predetermined threshold value, and a predetermined threshold value are set. Is compared with each other, and whether or not the drawing by the indicating means 4 is a beard-like drawing noise generated at the start position of the drawing stroke depending on how the pointing means 4 such as a finger lands, is identified. The input state can be properly recognized, and the reproduction image processing in which the whisker-like drawing noise generated at the start position of the drawing stroke is reduced can be performed.

A fourth embodiment of the present invention will be described with reference to FIGS. The same parts as those described in the first to third embodiments are denoted by the same reference numerals, and description thereof is omitted. This embodiment is a modification of the method of the coordinate input / detection device. In detail, the coordinate input / detection devices 1 and 50 used in the first to third embodiments are of the light shielding type. , A light reflection type.

Here, FIG. 25 shows a coordinate input / detection device 60.
FIG. 7 is a perspective view showing an indicating means 61 used for the present embodiment. Also,
FIG. 26 is a front view showing an example in which one point in the coordinate input / detection area 63 of the coordinate input / detection device 60 is indicated by the instruction means 61. As shown in FIG. 25, a retroreflective member 62 is provided near the tip of the pointing means 61 used to indicate a point in the coordinate input / detection area 63 of the coordinate input / detection device 60. This retroreflective member 62
Is formed by arranging a large number of conical corner cubes, for example, and has a characteristic of reflecting incident light toward a predetermined position regardless of the incident angle. For example, the probe light L _n emitted from the left light receiving / emitting means 5
As shown in FIG. 26, it is reflected by the retroreflection member 62 and will be received by the light receiving and emitting unit 5 to the left as retroreflected light L _{n 'that} follows the same optical path again. For this reason, as shown in FIG.
In the detection device 60, it is not necessary to provide the retroreflective member 7 in the coordinate input / detection area 63 unlike the coordinate input / detection devices 1 and 50 used in the first to third embodiments. . The indicating means 61 has a pen-like shape, and is preferably made of a material such as rubber or plastic rather than a glossy metal.

Therefore, the vicinity of the distal end of the pointing means 61 provided with the retroreflective member 62 is located at an appropriate position (x, x) in the coordinate input / detection area 63 of the coordinate input / detection device 60.
Insert the y), for example, the left side of the receiving and emitting probe light in the projected has been fan-shaped light Tabamaku from light means 5 L _n instruction means 61
When it is reflected by the retroreflection member 62, the retroreflected light L _{n 'is} received by the light receiving element 13 of the light emitting and receiving unit 5. When the light receiving element 13 receives the retroreflected light L _n ′ in this manner, the predetermined position Dn on the light receiving element 13 corresponding to the retroreflected light L _n ′ is defined as an area (bright spot) where the light intensity is high. Become. That is, as shown in FIG. 27, a region where the light intensity is high occurs at the position Dn on the light receiving element 13, and a peak appears in the shape of the light intensity distribution of the light from the light receiving element 13. The position Dn where this peak appears corresponds to the emission / incident angle θn of the reflected probe light, and Dn
Is detected, it is possible to know θn. That is, in the case of such a light reflection type coordinate input / detection device 60 as well, like the above-described coordinate input / detection device 1 and the like, the pointing means 61 is formed by a triangulation method based on a peak appearing in a light intensity waveform. Is calculated.

Therefore, even in such a light reflection type coordinate input / detection device 60, the fly / toning discrimination processing executed in the coordinate input / detection device 1 used in the first embodiment is performed based on the light intensity waveform. Can be executed on the basis of the peak appearing in the waveform of the light intensity. The fly / tome discriminating process executed in the coordinate input / detection device 1 used in the second embodiment can be executed based on the peak appearing on the waveform of the light intensity. On the basis of the data obtained by the coordinate input / detection device 50 used in the third embodiment.
The tome identification processing can be executed based on the coordinate position detected based on the peak appearing in the light intensity waveform.

A fifth embodiment of the present invention will be described with reference to FIGS. The same parts as those described in the first to fourth embodiments are denoted by the same reference numerals, and description thereof is omitted. This embodiment is a modification of the light emitting / receiving means. More specifically, in the light receiving / emitting means 5 used in the first to fourth embodiments, the coordinate input / detection area is formed by projecting a fan-shaped light flux film. Has a rotary scanning system such as a polygon mirror, and uses a light receiving / emitting unit 70 that radially projects a light beam emitted from a light source by the rotary scanning system to form a coordinate input / detection area.

Here, FIG. 28 is a plan view schematically showing the light emitting / receiving means 70. FIG. As shown in FIG. 28, the light receiving / emitting means 70 is a laser diode (semiconductor laser) 7 having a driving circuit (not shown) and emitting a laser beam.
1, a half mirror 72, a polygon mirror 73, and a condenser lens 74.
And are provided. The light receiving element 75 includes a condenser lens 74
(F is a focal length of the condenser lens 74). After the laser beam emitted from the LD 71 is turned back by the half mirror 72, the light receiving / emitting unit 70 sequentially reflects the laser beam radially by the polygon mirror 73 that is rotated and driven at a predetermined angular velocity ωt by a pulse motor (not shown). . Therefore, the light emitting / receiving means 70 repeatedly emits the light beam radially. That is, the two light receiving / emitting means 7
Coordinate input by beam light projected radially from 0 /
A detection area (not shown) will be formed. on the other hand,
The light beam reflected and incident on the light receiving / emitting means 70 is reflected by the polygon mirror 73 and reaches the half mirror 72. The reflected beam light that has reached the half mirror 72 passes through the half mirror 72 and reaches the light receiving element 75, where it is converted into an electric signal.

First, a case where such a light receiving / emitting means 70 is applied to the coordinate input / detection devices 1 and 50 instead of the light receiving / emitting means 5 will be considered. As shown in FIG.
When the light beam in which the indicating means 4 is inserted at a certain position in the detection area 3 is cut off, the light beam reaches the light receiving element 75 because the light beam is not reflected by the retroreflective member 7. Never. Thus, the coordinate input / detection area 3
When the light beam in which the indicating means 4 is inserted at a certain position in the inside is cut off, a dip appears in the shape of the intensity distribution of the light from the light receiving element 75.

The electrical connection and the like of each section are well known in the art, so detailed description is omitted. However, as shown in FIG. 30, when the pointing means 4 is not inserted in the coordinate input / detection area 3, Indicates that the light intensity is “I = I ₁ ”, but the pointing means 4 is inserted into the coordinate input / detection area 3 and the light receiving element 75
Light intensity when the return light does not return to would indicate _"I = I 0". A portion where the light intensity is “I = I ₀ ” is a dip. In FIG. 25, time t = t
₀ is a reference position of rotation of the polygon mirror 73,
This is the point in time when the light beam to be rotationally scanned reaches a predetermined angle.

Therefore, if the time t when the light intensity becomes “I = I ₀ ” is t ₁ , the coordinate input / detection area 3
Is calculated as θ = ω (t ₁ −t ₀ ) = ω △ t. That is, the emission angle θ of the light beam blocked by the indicating means 4 inserted into the coordinate input / detection area 3 in the light receiving / emitting means 70 provided on each of the right and left sides.
(ΘnL, θnR) are calculated and their emission angles θ
The position coordinates where the indicating means 4 is inserted are detected by the triangulation method based on (θnL, θnR).

Next, a case where such a light receiving / emitting means 70 is applied to the coordinate input / detection device 60 instead of the light receiving / emitting means 5 will be considered. As shown in FIG. 31, when the pointing means 61 is inserted at a certain position in the coordinate input / detection area 63, a predetermined light beam is emitted from the retroreflecting member 6 of the pointing means 61.
2, the light beam is retroreflected at the light receiving element 75
To reach. As described above, when the light beam in which the indicating means 61 is inserted at a certain position in the coordinate input / detection area 63 is retroreflected, a peak appears in the shape of the intensity distribution of the light from the light receiving element 75.

The electrical connection of each part is well known in the art, and therefore detailed description is omitted. However, as shown in FIG. 32, when the pointing means 61 is not inserted in the coordinate input / detection area 63, Indicates that the light intensity is “I = I ₀ ”, but when the pointing means 61 is inserted into the coordinate input / detection area 63 and the returning light reaches the light receiving element 75, the light intensity becomes “I = I ₀ ”.
₁ ”. Thus, when the light intensity is“ I =
The portion indicated by I ₁ ″ is a peak.
Time t = t ₀ is a reference position for the rotation of the polygon mirror 73, and is a point in time when the light beam to be rotationally scanned reaches a predetermined angle.

Therefore, if the time t at which the light intensity becomes “I = I ₁ ” is t ₁ , the coordinate input / detection area 6
The emission angle θ of the light beam retroreflected by the indicating means 61 inserted in 3 is calculated as θ = ω (t ₁ −t ₀ ) = ω ＝ t. In other words, the emission angles θ (θnL, θnR) of the light beams retroreflected by the instruction means 61 inserted into the coordinate input / detection area 63 in the light receiving / emitting means 70 provided on each of the left and right sides are calculated, and the emission angles thereof are calculated. The position coordinates where the indicating means 61 is inserted are detected by a triangulation method based on θ (θnL, θnR).

Therefore, even when such a light receiving / emitting means 70 is used in place of the light receiving / emitting means 5, the fly / toning discrimination processing executed in the coordinate input / detection device 1 used in the first embodiment. Can be executed based on a dip or a peak appearing in the waveform of the light intensity. In addition, the splash / tome identification process executed in the coordinate input / detection device 1 used in the second embodiment is performed. This can be performed based on dips or peaks appearing in the waveform, and can be further performed by using the coordinate input / input used in the third embodiment.
The fly / toning discrimination processing executed in the detection device 50 can be executed based on a coordinate position detected based on a dip or a peak appearing in the light intensity waveform.

A sixth embodiment of the present invention will be described with reference to FIGS. The same parts as those described in the first to third embodiments are denoted by the same reference numerals, and description thereof is omitted. This embodiment is a modification of the method of the coordinate input / detection device,
This is an example in which a so-called camera imaging type coordinate input / detection device is applied in which image information in a coordinate input / detection area is captured by an imaging camera, and position coordinates are detected based on a part of the captured image information. is there.

Here, FIG. 33 shows a coordinate input / detection device 80.
FIG. 2 is a front view schematically showing the configuration of FIG. At both upper ends of the coordinate input / detection area 81 of the coordinate input / detection device 80, imaging cameras 82 as imaging means are provided at a distance w. The imaging camera 82 includes a CCD (Charge Coupled).
A light receiving element 83 and a focusing optical lens 84 are provided at a distance f from each other. The imaging angle of view of these imaging cameras 82 is about 90 degrees, and the cameras 82 are installed so that the coordinate input / detection area 81 is used as an imaging range. The imaging camera 82 is a PD that forms a coordinate input surface.
The PDP 102 is installed at a predetermined distance from the display surface 20 of the PDP 102, and its optical axis is parallel to the display surface 20 of the PDP 102.

In addition, a background plate 85 is provided at a peripheral portion excluding the upper portion of the coordinate input / detection area 81 and at a position covering the entire field of view without obstructing the angle of view of the image pickup camera 82. The background plate 85 faces the center of the coordinate input / detection area 81, and the display surface 2 of the PDP 102
It is provided substantially perpendicular to 0. The background plate 85 is, for example, uniform black.

FIG. 34 shows the relationship between the signal of the imaging camera 82 and the instruction means 86. As shown in FIG.
When 6 is inserted into the coordinate input / detection area 81, the indicating means 86 is photographed by the imaging camera 82 and the indicating means 86
Is formed on the light receiving element 83 of the imaging camera 82.
In the case where the background plate 85 is black as in the coordinate input / detection device 80 of the present embodiment and a finger is used as the pointing device 86, the pointing device 86 has a higher reflectance than the background plate 85. Therefore, the portion corresponding to the pointing means 86 of the light receiving element 83 is an area (bright spot) where the light intensity is high.

The electrical connection and the like of each section is well known in the art, so detailed description is omitted. However, as shown in FIG. 34, when the indicating means 86 is inserted in the coordinate input / detection area 81, A peak appears in the shape of the intensity distribution of the light from the light receiving element 83. Position Dn where this peak appears
Corresponds to the apparent angle θn of the pointing means 86 from the principal point of the imaging optical lens 84, and θn can be expressed as θn = arctan (Dn / f) as a function of Dn. That is, in the case of such a coordinate input / detection device 80 of the camera imaging method, similarly to the above-described coordinate input / detection device 1 and the like, the pointing means 86 is formed by a triangulation method based on a peak appearing in a light intensity waveform. Is calculated.

Accordingly, even in such a coordinate input / detection device 80 of the camera image pickup system, the splash / toning discrimination processing executed in the coordinate input / detection device 1 used in the first embodiment is performed based on the light intensity waveform. Can be executed on the basis of the peak appearing in the waveform of the light intensity. The fly / tome discriminating process executed in the coordinate input / detection device 1 used in the second embodiment can be executed based on the peak appearing on the waveform of the light intensity. And the coordinate input / detection device 50 used in the third embodiment performs the fly / tome identification processing based on the coordinate position detected based on the peak appearing in the light intensity waveform. Can be performed based on

As the indicating means 86, a dedicated pen with a light emitting element which emits light by itself can be applied.

A seventh embodiment of the present invention will be described with reference to FIGS. The same parts as those described in the first to third embodiments are denoted by the same reference numerals, and description thereof is omitted. This embodiment is a modification of the method of the coordinate input / detection device,
Instead of detecting coordinates by triangulation as described above, what is called L that directly detects coordinates of two orthogonal axes.
This is an example to which an ED array type coordinate input / detection device is applied.

FIG. 35 shows a coordinate input / detection device 90.
FIG. 2 is a front view schematically showing the configuration of FIG. As shown in FIG. 35, the coordinate input / detection device 90 includes a light emitting diode (LED: Light Emitting Diode) 9 as Xm light emitting units.
Light emitting element rows 92 in which 1 are arranged at regular intervals in the horizontal direction;
A light-receiving element array 94 in which Xm phototransistors 93 corresponding to one-to-one are arranged at regular intervals, a light-emitting element array 95 in which Yn LEDs 91 are arranged at regular intervals in a vertical direction, Yn corresponding to this one-to-one
And a light-receiving element array 96 in which the phototransistors 93 are arranged to face each other at regular intervals. Then, these light emitting element rows 92, light receiving element rows 94, light emitting element rows 95,
A space surrounded by the light receiving element array 96 is a coordinate input / detection area 97. That is, in the coordinate input / detection area 97, m optical paths formed in the horizontal direction and n optical paths formed in the vertical direction can intersect in a matrix. The coordinate input / detection area 97 is
This is a region corresponding to the size of the display surface 20 of the PDP 102 and formed in a horizontally long rectangular shape, and is an area in which characters, figures, and the like can be input by handwriting.

When a pointing means 98 such as a finger is inserted at a certain position in the coordinate input / detection area 97, a predetermined light path is blocked by the pointing means 98. The amount of light received by the phototransistors 93 in the row 94 and the phototransistors 93 in the light receiving element row 96 decreases.

The electrical connection and the like of each part is well known in the art, and therefore detailed description is omitted. However, as shown in FIG. 36, when the pointing means 98 is not inserted in the coordinate input / detection area 97, Indicates that the light intensity of each phototransistor 93 is “I = i ₁ ”. However, if the light path is blocked by the insertion of the indicating means 98 into the coordinate input / detection area 97, the phototransistor 93 in the cutoff light path Has a light intensity of "I
= I ₀ ". In this manner, the light intensity becomes" I =
The portion that is i ₀ ″ is referred to as a dip.
The horizontal axis corresponds to the position of the phototransistor 93, and is actually a scanning time for sequentially reading the optical output of the phototransistor 93.

Then, the dip positions corresponding to the positions of the phototransistor 93 of the light receiving element array 94 and the phototransistor 93 of the light receiving element array 96 in which the amount of received light has decreased have been detected. Calculate the coordinate position. In practice, and time t ₁ until the dip position from the reference position t = t ₀ is detected, FIG. 3
The waveform indicated by 6 is taken into the memory, and the position of the dip is detected as the memory address corresponding to the dip position for the data in the memory.

Therefore, even in such an LED array type coordinate input / detection device 90, the fly / toning discrimination processing executed in the coordinate input / detection device 1 used in the first embodiment is performed based on the light intensity waveform. Can be executed based on the dip appearing in the waveform of the light intensity. The fly / toning discriminating process executed in the coordinate input / detection device 1 used in the second embodiment can be executed based on the dip appearing in the light intensity waveform. The coordinate position detected based on the dip appearing in the waveform of the light intensity is obtained by performing the fly / tome identification processing performed in the coordinate input / detection device 50 used in the third embodiment. Can be performed based on

In each embodiment, the coordinate input / detection device is provided in the plasma display panel (PDP) 102 as a display device. However, the present invention is not limited to this, and the CRT (Cathode Ray Tuner) is not limited to this.
be), an LCD (Liquid Crystal Display), a front projection projector, a rear projection projector, or the like may be applied as the display device. Further, the present invention is not limited to these display devices, and may be provided on a blackboard, whiteboard, or the like that functions as a writing board, although not particularly shown.

In each embodiment, a floppy disk, hard disk, optical disk (CD-ROM, CD-R, CD-R / W, DV) is used as a storage medium 39 storing various program codes (control programs).
D-ROM, DVD-RAM, etc., a magneto-optical disk (MO), a memory card, and the like are applied. However, the present invention is not limited to this, and the storage medium is not limited to a medium independent of a computer, but may be a LAN, the Internet, or the like. Also, a storage medium that downloads and transmits or temporarily stores the transmitted program is included.

[0211]

According to the first aspect of the present invention, the tailing or drawing stroke is applied to the "stop" portion which is an unintended "bounce" which is generated at the end position of the drawing stroke but is unintentionally "bounced" despite being stopped. Whisker-like drawing noise generated at the start position can be reliably suppressed.

According to the invention as set forth in claims 2, 17 and 26, natural and different movements of an object at a "bounce" portion or a "stop" portion of a drawing according to a continuous information input operation by an object such as a finger. (The "bounce" portion and the "stop" portion are common in that they steeply move away from the information input area surface, but the "bounce" portion has a zero cross point where the slope of the change per unit time of the dip position according to drawing becomes zero. And the time interval between the position where the dip disappears and the position where the dip disappears is longer than the "stop" portion), and compares the time interval between the zero-cross point and the position where the dip disappears with a predetermined threshold value set in advance. , Depending on the size, whether the drawing by the object is "bounce" or "stop"
By recognizing the state, the input state can be more appropriately recognized, and reproduced image processing in which tailing or the like for the “stop” portion is reduced can be performed.

According to the inventions of claims 3, 18, and 27, natural and different movements of an object at a “bounce” portion or a “stop” portion of a drawing in response to a continuous information input operation by an object such as a finger. (The "bounce" portion and the "stop" portion are common in that they steeply move away from the information input area surface, but the "bounce" portion has a zero cross point where the slope of the change per unit time of the dip position according to drawing becomes zero. And the time interval between the drawing end position is longer than the “stop” part).
By comparing the time interval between the zero cross point and the end position of the drawing with a predetermined threshold value set in advance, and identifying whether the drawing by the object is `` bounce '' or `` stop '' according to the magnitude thereof, The input state can be more appropriately recognized, and reproduction image processing in which tailing or the like for an unintended “bounce” “stop” portion is reduced is enabled.

According to the invention as set forth in claims 4, 19, and 28, the natural and different movement of the object at the "bounce" portion or the "stop" portion of the drawing according to the continuous information input operation by the object such as a finger. And comparing the time interval between the zero-cross point where the inclination of the change per unit time of the dip position according to the drawing per unit time is zero and the drawing start position with a predetermined threshold value set in advance, and By identifying whether the drawing by the object is a beard-like drawing noise that occurs at the start position of the drawing stroke depending on how the object such as a finger lands, the input state can be more appropriately recognized, and the drawing stroke can be recognized. Reproduction image processing in which beard-like drawing noise generated at the start position is reduced is enabled.

According to the inventions described in claims 5, 20, and 29, natural and different movements of an object in a "bounce" portion or a "stop" portion of a drawing in response to a continuous information input operation by an object such as a finger. (The "bounce" portion and the "stop" portion are common in that they steeply move away from the information input area surface, but the "bounce" portion has a zero cross point where the slope of the change in the peak position per unit time according to drawing becomes zero. And the time interval between the drawing end position becomes longer than the “stop” portion), and compares the time interval between the zero-cross point and the drawing end position with a predetermined threshold value. By identifying whether the drawing by the object is "bounce" or "stop" according to the size, the input state can be recognized more appropriately, and tailing etc. for the "stop" part which is unintended "bounce" is reduced Reproducible image processing is possible It made.

According to the inventions described in claims 6, 21 and 30, the natural and different movement of the object at the "bounce" portion or the "stop" portion of the drawing according to the continuous information input operation by the object such as a finger. And comparing the time interval between the zero-crossing point at which the inclination of the change per unit time of the peak position according to drawing per unit time is zero and the drawing start position with a predetermined threshold value set in advance, and determining the magnitude thereof. By identifying whether the drawing by the object is a beard-like drawing noise that occurs at the start position of the drawing stroke depending on how the object such as a finger lands, the input state can be more appropriately recognized, and the drawing stroke can be recognized. Reproduction image processing in which beard-like drawing noise generated at the start position is reduced is enabled.

According to the seventh and twenty-second aspects of the present invention, tailing and drawing strokes are applied to the "stop" portion, which is an unintended "bounce" which is generated at the end position of the drawing stroke but is unintentionally bounced despite being stopped. Whisker-like drawing noise generated at the start position can be reliably suppressed irrespective of the generation direction.

According to the eighth, twenty-third and thirty-second aspects of the present invention, natural and different movements of an object in a "bounce" portion or a "stop" portion of a drawing in response to a continuous information input operation by an object such as a finger. (The “bounce” part and the “stop” part are common in that they steeply move away from the information input area surface, but the “bounce” part is the slope of the change per unit time of the two-dimensional position coordinate component detected in accordance with the drawing. The time interval between the zero-cross point at which is zero and the drawing end position is longer than the “stop” portion), and the time interval between the zero-cross point and the drawing end position is determined by a predetermined threshold value. And whether the drawing by the object is "bounce" or "stop" according to the magnitude
By recognizing the state, the input state can be more appropriately recognized, and reproduced image processing in which tailing or the like for an unintended “bounce” “stop” portion is reduced becomes possible.

According to the ninth, twenty-fourth, and thirty-second aspects of the invention, natural and different movements of an object in a "bounce" portion or a "stop" portion of a drawing in response to a continuous information input operation by an object such as a finger. Focusing on, the time interval between the zero cross point where the inclination of the change per unit time of the two-dimensional position coordinate component detected according to the drawing is zero, the time interval between the drawing start position, and a predetermined threshold value set in advance By comparing and determining whether the drawing by the object is a beard-like drawing noise generated at the start position of the drawing stroke depending on how the object such as a finger lands, the input state can be more appropriately determined. Recognition is possible, and reproduction image processing in which beard-like drawing noise generated at the start position of a drawing stroke is reduced is enabled.

According to the tenth and twenty-fifth aspects of the present invention, a tailing or drawing stroke is applied to a "stop" portion which is an unintended "bounce" which is generated at the end position of the drawing stroke but is bouncing despite being stopped. Whisker-like drawing noise generated at the start position can be reliably suppressed irrespective of the generation direction.

According to the eleventh aspect, according to the first aspect,
10. The information input device according to any one of items 1 to 10,
The information input area is formed by projecting light emitted from a light source into a plate shape and projecting the light, so that a two-dimensional information input area that receives insertion of an object can be reliably formed, It is possible to provide an information input device that realizes a neglected difference, complete transparency, and high drawing feeling.

According to the twelfth aspect, the first aspect
10. The information input device according to any one of to 10
The information input area is formed by sequentially scanning and projecting the light beam emitted from the light source,
A two-dimensional information input area for accepting the insertion of an object can be reliably formed, and an information input device that achieves a neglected difference, complete transparency, and a high drawing feeling can be provided.

According to a thirteenth aspect of the present invention, in the information input device according to any one of the first, fifth, sixth, seventh, eighth, ninth, and tenth aspects, the information input area includes an image pickup range of an image pickup means. Accordingly, a two-dimensional information input area for accepting insertion of an object can be reliably formed, and an information input device that realizes a neglected difference, complete transparency, and high drawing feeling can be provided.

According to the fourteenth aspect of the present invention, in the information input device according to any one of the first, second, third, fourth, seventh, eighth, ninth, and tenth aspects, the information input area may include the light receiving means. And the light-emitting means provided opposite to the light-receiving means are formed by arranging them in a matrix, so that a two-dimensional information input area for receiving the insertion of an object can be reliably formed and ignored. An information input device that realizes a difference, complete transparency, and high drawing feeling can be provided.

According to the information input system of the present invention, the display device and the information input area are arranged on the display surface of the display device so as to coincide with each other.
The information input device according to any one of the above, and a control device that performs display control of the display device based on an input from the information input device, the physical input device such as a coordinate input surface (touch panel surface) It is possible to provide an inexpensive information input system that has excellent visibility even when it is used by being attached to the display surface of a display device without using any surface.

According to the information input system of the present invention, the writing board for accepting handwriting and the information input area are arranged on the writing surface of the writing board so as to match the information input area. The information input device according to any one of the above, and a control device that controls information written on the writing board based on an input from the information input device, including a coordinate input surface (touch panel surface). An information input system that has no physical surface and has excellent visibility even when used while being attached to the display surface of a display device can be provided at low cost.

According to the inventions described in claims 33, 34 and 35, natural and different movements of the indicating means in the "bounce" portion or the "stop" portion of the drawing based on the continuous instruction by the indicating device such as a finger ( The “bounce” part and the “stop” part are common in that they steeply move away from the coordinate input / detection area plane, but the “bounce” part has a zero crossing where the slope of the change per unit time of the dip position according to drawing becomes zero. Focusing on the time interval between the point and the position where the dip disappears is longer than the “stop” portion), and comparing the time interval between the zero-cross point and the position where the dip disappears with a predetermined threshold set in advance Then, by recognizing whether the drawing by the instruction means is "bounce" or "stop" according to the magnitude, the input state can be recognized more properly, and reproduction with reduced tailing etc. for the "stop" part Image processing It can become.

[Brief description of the drawings]

FIG. 1 is an external perspective view schematically showing an electronic blackboard system according to a first embodiment of the present invention.

FIG. 2 is a block diagram showing an electrical connection of each unit built in the electronic blackboard system.

FIG. 3 is a block diagram showing an electrical connection of each unit built in the computer.

FIG. 4 is a schematic front view showing a coordinate input / detection device.

FIG. 5 is a schematic front view showing a configuration example of the internal structure of the light receiving and emitting means.

FIG. 6 is a schematic front view for explaining the detection operation.

FIG. 7 is a schematic front view showing a mounting interval and the like of light emitting and receiving means.

FIG. 8 is a cross-sectional view showing an example of installation on the front of a display or the like.

FIG. 9 is a block diagram showing a configuration example of the control system.

FIG. 10 is a block diagram functionally showing a coordinate input / detection device.

FIG. 11 is a flowchart schematically showing a flow of a fly / tome identification process.

FIG. 12A is a graph showing a change over time in a dip depth and a dip position in a light receiving element when a Chinese character “3” is drawn, and FIG. 12B is a graph showing “bounce” at each stroke end of the Chinese character “3”. 9 is a graph showing a time change of a dip depth and a dip position in a light receiving element when drawing an image having a portion.

FIG. 13A is a graph showing a partially enlarged time change of the dip depth and the dip position in the light receiving element when the Chinese character “3” is drawn, and FIG. 13B is each stroke of the Chinese character “3”. 6 is a graph showing a partially enlarged time change of a dip depth and a dip position in a light receiving element when an image having a “bounce” portion at an end is drawn.

FIG. 14 is a differential graph thereof.

FIG. 15 is a block diagram functionally showing a coordinate input / detection device according to a second embodiment of the present invention.

FIG. 16 is a flowchart schematically showing a flow of a fly / tome identification process.

17A is a graph showing coordinate data acquired when a Chinese character “3” is drawn, FIG. 17B is a graph showing a time change of a dip position corresponding to a solid line portion in FIG.
(C) is a graph showing the change per unit time of the dip position corresponding to the solid line portion of (a).

FIG. 18 is a graph showing a relationship between a dip position on a light receiving element and time when drawing a stroke.

FIG. 19A is a graph showing a state where the coordinate data obtained when the kanji character “3” is drawn is subjected to a splash / tome identification process, and FIG. 19B is a dip corresponding to the solid line portion in FIG. FIG. 5C is a graph showing a change in position over time, and FIG. 5C is a graph showing a change per unit time of a dip position corresponding to a solid line portion in FIG.

FIG. 20 is a block diagram functionally showing a coordinate input / detection device according to a third embodiment of the present invention.

FIG. 21 is a flowchart schematically showing a flow of a fly / tome identification process.

22 (a) is a graph showing coordinate data obtained when a Chinese character “3” is drawn, FIG. 22 (b) is a graph showing a time change of an x coordinate corresponding to a solid line portion in FIG. () Is a graph showing the change per unit time of the x coordinate corresponding to the solid line portion in (a).

FIG. 23 is a graph showing a relationship between a coordinate position and time when drawing a stroke.

24A is a graph showing a state in which the coordinate data obtained when the kanji character “3” is drawn is subjected to a splash / tome identification process, and FIG. 24B is a graph showing x corresponding to a solid line portion in FIG. FIG. 4C is a graph showing a change over time in coordinates, and FIG. 4C is a graph showing a change per unit time of the x coordinate corresponding to the solid line portion in FIG.

FIG. 25 is a perspective view showing an indicating means used in a coordinate input / detection device according to a fourth embodiment of the present invention.

FIG. 26 is a front view showing an example in which one point in the coordinate input / detection area of the coordinate input / detection device is pointed by the instruction means;

FIG. 27 is a schematic front view for explaining the detection operation.

FIG. 28 is a plan view schematically showing a light emitting / receiving means according to a fifth embodiment of the present invention.

FIG. 29 is a schematic front view for explaining a coordinate detection operation.

FIG. 30 is a graph showing the relationship between light intensity and time.

FIG. 31 is a schematic front view for explaining a coordinate detection operation.

FIG. 32 is a graph showing the relationship between light intensity and time.

FIG. 33 is a front view schematically showing a configuration of a coordinate input / detection device according to a sixth embodiment of the present invention.

FIG. 34 is a schematic front view for explaining the detection operation.

FIG. 35 is a front view schematically showing a configuration of a coordinate input / detection device according to a seventh embodiment of the present invention.

FIG. 36 is a graph showing a relationship between light intensity and time.

FIG. 37 is an explanatory diagram illustrating a drawing operation using a finger or the like;

FIG. 38 is an explanatory diagram exaggerating an example of a characteristic character configuration and a drawing example accompanying the writing.

[Explanation of symbols]

1, 50, 60, 80, 90 Coordinate input / detection device, information input device 3, 63, 81, 97 Coordinate input / detection area, information input area 4 indicating means, object 13, 75, 83, 94 light receiving means 32 threshold Storage means 39 Storage medium 82 Imaging means 91 Light emitting means 101 Information input system 102 Display device 105 Control device

Claims (35)

[Claims] 1. An information input device for detecting a predetermined object instructing a two-dimensional information input area and outputting the same as predetermined input information, wherein a predetermined object is detected based on a continuous information input operation by the object in the information input area. When the time interval between the zero cross point at which the gradient of the change of the component per unit time becomes zero and the end of the continuous information input operation is larger than a predetermined threshold, the zero cross point and the continuous An information input device for validating input information connected to an end of an information input operation. 2. An information input device for detecting a predetermined object instructing a two-dimensional information input area by light receiving means and outputting the detected information as predetermined input information, wherein a continuous information input operation by the object in the information input area is performed. A zero-crossing point detecting means for detecting a zero-crossing point at which the inclination of a change per unit time of the dip position of the detection signal of the light-receiving means becomes zero, and the zero-crossing point and dip detected by the zero-crossing point detecting means disappear. A post-bending duration detecting means for detecting a time interval from the position where the dip disappears, a threshold storage means for storing a predetermined threshold value for a time interval between the zero-cross point and the position where the dip disappears, and a post-bending duration detecting means. Comparing means for comparing the detected time interval with a predetermined threshold value stored in the threshold value storage means; When the time interval detected by the detecting means is larger than a predetermined threshold value, there is provided fly / tome discriminating means for validating input information connecting the zero cross point and the position where the dip has disappeared. Information input device. 3. An information input device for detecting a predetermined object instructing a two-dimensional information input area by a light receiving means and outputting the detected information as predetermined input information, wherein a continuous information input operation by the object in the information input area is performed. A zero-crossing point detecting means for detecting a zero-crossing point at which a slope of a change per unit time of a dip position of a detection signal of the light receiving means according to the zero-crossing point becomes zero; A time interval detecting means for detecting a time interval between the end position of the continuous information input operation and a threshold value storing a predetermined threshold value relating to a time interval between the zero cross point and the end position of the continuous information input operation by the object Storage means, comparing the time interval detected by the time interval detection means with a predetermined threshold stored in the threshold storage means Comparing means, and when the time interval detected by the time interval detecting means is larger than a predetermined threshold value, the input information connecting the zero cross point and the end position of the continuous information input operation by the object is validated. An information input device, comprising: 4. An information input device for detecting a predetermined object instructing a two-dimensional information input area by a light receiving means and outputting the detected information as predetermined input information, wherein a continuous information input operation by the object in the information input area is performed. Zero cross point detection means for detecting a zero cross point at which the slope of the change per unit time of the corresponding dip position becomes zero, and a continuous information input operation by the zero cross point and the object detected by the zero cross point detection means. A time interval detecting means for detecting a time interval from a start position, a threshold storage means for storing a predetermined threshold value for a time interval between the zero cross point and a start position of a continuous information input operation by the object, the time interval Comparing means for comparing the time interval detected by the detecting means with a predetermined threshold value stored in the threshold value storing means; A spring / eye discriminating means for validating input information connecting the zero-cross point and a start position of a continuous information input operation by the object when the time interval detected by the distance detecting means is larger than a predetermined threshold value; An information input device comprising: 5. An information input device for detecting a predetermined object instructing a two-dimensional information input area by a light receiving means and outputting the detected information as predetermined input information, wherein a continuous information input operation by the object in the information input area is performed. A zero-crossing point detecting means for detecting a zero-crossing point at which a slope of a change per unit time of a peak position of a detection signal of the light-receiving means becomes zero, and the zero-crossing point detected by the zero-crossing point detecting means and the object A time interval detecting means for detecting a time interval between the end position of the continuous information input operation and a threshold value storing a predetermined threshold value relating to a time interval between the zero cross point and the end position of the continuous information input operation by the object Storage means for comparing the time interval detected by the time interval detection means with a predetermined threshold value stored in the threshold value storage means; Comparing means, when the time interval detected by the time interval detecting means is greater than a predetermined threshold value, validating input information connecting the zero cross point and the end position of the continuous information input operation by the object; An information input device, comprising: 6. An information input device for detecting a predetermined object instructing a two-dimensional information input area by a light receiving means and outputting the detected information as predetermined input information, wherein a continuous information input operation by the object in the information input area is performed. A zero-crossing point detecting means for detecting a zero-crossing point at which a slope of a change per unit time of a peak position of a detection signal of the light-receiving means becomes zero, and the zero-crossing point detected by the zero-crossing point detecting means and the object A time interval detecting means for detecting a time interval between a start position of a continuous information input operation and a threshold value storing a predetermined threshold value for a time interval between the zero cross point and a start position of a continuous information input operation by the object Storage means for comparing the time interval detected by the time interval detection means with a predetermined threshold value stored in the threshold value storage means; Comparing means, when the time interval detected by the time interval detecting means is larger than a predetermined threshold value, validating input information connecting the zero-cross point and a start position of a continuous information input operation by the object; An information input device, comprising: 7. The apparatus according to claim 1, further comprising a plurality of said light receiving means, wherein said fly / tome discriminating means determines a time interval detected by said time interval detecting means on the basis of a light intensity distribution detected by all said light receiving means. 7. The method according to claim 3, wherein input information connecting the zero-cross point and a start position or an end position of a continuous information input operation by the object is validated when the value is larger than the predetermined value. Information input device. 8. An information input device for detecting a predetermined object instructing a two-dimensional information input area and outputting the same as predetermined input information, wherein the two or more objects correspond to a continuous information input operation by the object in the information input area. A zero-crossing point detecting means for detecting a zero-crossing point at which a gradient of a change in a dimensional position coordinate component per unit time becomes zero; and a continuous information input operation by the zero-crossing point detected by the zero-crossing point detecting means and the object. A time interval detecting means for detecting a time interval from the end position; a threshold storage means for storing a predetermined threshold value for a time interval between the zero-cross point and the end position of the continuous information input operation by the object; Comparing means for comparing the time interval detected by the detecting means with a predetermined threshold value stored in the threshold value storing means; When the time interval detected by the output unit is larger than a predetermined threshold value, a fly / toning discriminating unit for validating input information connecting the zero-cross point and a terminal position of a continuous information input operation by the object; An information input device comprising: 9. An information input device for detecting a predetermined object pointing to a two-dimensional information input area and outputting the same as predetermined input information, comprising: A zero-crossing point detecting means for detecting a zero-crossing point at which a gradient of a change in a dimensional position coordinate component per unit time becomes zero; and a continuous information input operation by the zero-crossing point detected by the zero-crossing point detecting means and the object. A time interval detecting means for detecting a time interval from a start position, a threshold storage means for storing a predetermined threshold value for a time interval between the zero cross point and a start position of a continuous information input operation by the object, the time interval Comparing means for comparing the time interval detected by the detecting means with a predetermined threshold value stored in the threshold value storing means; When the time interval detected by the output unit is larger than a predetermined threshold value, a fly / toning discriminating unit for validating input information connecting the zero-cross point and a start position of a continuous information input operation by the object; An information input device comprising: 10. The system according to claim 1, wherein the time interval detected by the time interval detecting means based on all coordinate components constituting the two-dimensional position coordinates is larger than a predetermined threshold value. 10. The information input device according to claim 8, wherein input information connecting a zero cross point and a start position or an end position of a continuous information input operation by the object is validated. 11. The information input device according to claim 1, wherein the information input area is formed by shaping light emitted from a light source into a plate shape and projecting the light into a plate shape. apparatus. 12. The information input device according to claim 1, wherein the information input area is formed by sequentially scanning and projecting light beams emitted from a light source. . 13. The information input area is an imaging range of an imaging unit.
The information input device according to any one of 7, 8, 9, and 10. 14. The information input area is formed by arranging an optical path of the light receiving means and a light emitting means provided opposite to the light receiving means in a matrix. , 3,4,7,8,9,10
The information input device according to any one of the above. 15. The information input device according to claim 1, wherein the information input region is arranged on the display surface of the display device so as to match the information input region. An information input system, comprising: a control device that performs display control of the display device based on an input. 16. A writing board for receiving writing, an information input device according to any one of claims 1 to 14, wherein the information input area is arranged on a writing surface of the writing board so as to match the information input area. A control device for controlling information written on the writing board based on an input from the device. 17. An input information identification method for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and identifying input information corresponding to an operation of the object, wherein the object in the information input area is A zero-cross point at which the slope of the change per unit time of the dip position of the detection signal of the light-receiving means in accordance with the continuous information input operation is zero, and the time interval between the zero-cross point and the position where the dip disappears And comparing the time interval with a predetermined threshold value.If the time interval is greater than a predetermined threshold value, the input information connecting the zero cross point and the position where the dip has disappeared is validated. Input information identification method. 18. An input information identification method for detecting a predetermined object indicating a two-dimensional information input area by light receiving means and identifying input information corresponding to an operation of the object, wherein the object in the information input area is Detecting a zero-cross point at which the slope of the change per unit time of the dip position of the detection signal of the light receiving means according to the continuous information input operation by zero becomes zero, and the continuous information input operation by the zero-cross point and the object Detecting a time interval with the end position of the object, comparing the time interval with a predetermined threshold value for the time interval between the zero cross point and the end position of the continuous information input operation by the object, and Input information connecting the zero-cross point and the end position of the continuous information input operation by the object when the threshold is larger than Broadcast identification method. 19. An input information identification method for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and identifying input information corresponding to an operation of the object, wherein the object in the information input area is Detecting a zero-cross point at which the slope of the change per unit time of the dip position of the detection signal of the light receiving means according to the continuous information input operation by zero becomes zero, and the continuous information input operation by the zero-cross point and the object Detecting a time interval with the start position of the object, comparing the time interval with a predetermined threshold value for the time interval between the zero cross point and the start position of the continuous information input operation by the object, and The input information connecting the zero-cross point and the start position of the continuous information input operation by the object when the threshold value is larger than the threshold value. Broadcast identification method. 20. An input information identification method for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and identifying input information corresponding to an operation of the object, wherein the object in the information input area is Detecting a zero-crossing point at which the slope of a change per unit time of the peak position of the detection signal of the light receiving means according to the continuous information inputting operation becomes zero, and the continuous information inputting operation by the zero-crossing point and the object Detecting a time interval with the end position of the object, comparing the time interval with a predetermined threshold value for the time interval between the zero cross point and the end position of the continuous information input operation by the object, and Input information connecting the zero-cross point and the end position of the continuous information input operation by the object when the threshold value is larger than the threshold value of the input information. Identification method. 21. An input information identification method for detecting a predetermined object instructing a two-dimensional information input area by light receiving means and identifying input information corresponding to an operation of the object, wherein the object in the information input area is Detecting a zero-crossing point at which the slope of a change per unit time of the peak position of the detection signal of the light receiving means according to the continuous information inputting operation becomes zero, and the continuous information inputting operation by the zero-crossing point and the object Detecting a time interval with the start position of the object, comparing the time interval with a predetermined threshold value for the time interval between the zero cross point and the start position of the continuous information input operation by the object, and Input information connecting the zero-cross point and the start position of the continuous information input operation by the object when the threshold value is larger than the threshold value of the input information. Identification method. 22. When the time interval detected based on the light intensity distributions detected by all the light receiving means is larger than a predetermined threshold, a continuous information input operation by the zero cross point and the object is performed. 22. The input information identification method according to claim 18, wherein input information connecting the start position or the end position is made valid. 23. An input information identification method for detecting a predetermined object pointing to a two-dimensional information input area and identifying input information corresponding to an operation of the object, wherein the input object identification method includes: A zero-cross point at which the gradient of the change per unit time of the two-dimensional position coordinate component according to the information input operation becomes zero, and the time interval between the zero-cross point and the end position of the continuous information input operation by the object The time interval is compared with a predetermined threshold value for a time interval between the zero-cross point and the end position of the continuous information input operation by the object.If the time interval is larger than a predetermined threshold value, Input information connecting the zero-cross point and an end position of a continuous information input operation by the object is validated. 24. An input information identification method for detecting a predetermined object instructing a two-dimensional information input area and identifying input information corresponding to an operation of the object, wherein the input information identification method includes: A zero-cross point at which the slope of the change per unit time of the two-dimensional position coordinate component according to the information input operation is zero, and the time interval between the zero-cross point and the start position of the continuous information input operation by the object The time interval is compared with a predetermined threshold value for a time interval between the zero-cross point and the start position of the continuous information input operation by the object.If the time interval is larger than a predetermined threshold value, Input information connecting the zero-cross point and a start position of a continuous information input operation by the object is validated. 25. When the time interval detected based on all coordinate components constituting the two-dimensional position coordinate is larger than a predetermined threshold value, start of a continuous information input operation by the zero cross point and the object 25. The input information identification method according to claim 23, wherein input information connecting the position or the end position is made valid. 26. A computer-readable storage storing a program for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and causing a computer to identify input information corresponding to the operation of the object. A medium, the computer comprising: a zero cross point at which a slope of a change per unit time of a dip position of a detection signal of the light receiving unit according to a continuous information input operation by the object in the information input area becomes zero. A zero-cross point detection function to detect, a post-bending duration detection function to detect a time interval between the zero-cross point and the position where the dip disappears, and a predetermined threshold value for a time interval between the zero-cross point and the position where the dip disappears. A comparison function for comparing the detected time interval with the time interval, and when the time interval is greater than a predetermined threshold The computer-readable storage medium storing a program for executing the the input information determination function to enable input information connecting the position where the zero-cross point and a dip is extinguished. 27. A computer-readable storage storing a program for detecting a predetermined object pointing to a two-dimensional information input area by a light receiving means and causing a computer to identify input information corresponding to the operation of the object. A medium, the computer comprising: a zero cross point at which a slope of a change per unit time of a dip position of a detection signal of the light receiving unit according to a continuous information input operation by the object in the information input area becomes zero. A zero-crossing point detecting function to detect, a time interval detecting function to detect a time interval between the zero-crossing point and the end position of the continuous information inputting operation by the object, a continuous information inputting operation by the zero-crossing point and the object A comparison function for comparing a predetermined threshold value with respect to the time interval with the end position of the When the time interval is larger than a predetermined threshold, an input information discriminating function for validating input information connecting the zero cross point and the end position of the continuous information input operation by the object, and a program for executing A stored computer-readable storage medium. 28. A computer-readable storage storing a program for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and causing a computer to identify input information corresponding to the operation of the object. A medium, the computer comprising: a zero cross point at which a slope of a change per unit time of a dip position of a detection signal of the light receiving unit according to a continuous information input operation by the object in the information input area becomes zero. A zero-crossing point detecting function to detect; a time interval detecting function to detect a time interval between the zero-crossing point and a start position of a continuous information inputting operation by the object; a continuous information inputting operation by the zero-crossing point and the object. A comparison function of comparing a predetermined threshold value with respect to a time interval with the start position of the target position with the detected time interval; A program for executing an input information discriminating function for validating input information connecting the zero-cross point and the start position of the continuous information input operation by the object when the time interval is larger than a predetermined threshold value. A stored computer-readable storage medium. 29. A computer-readable storage storing a program for detecting a predetermined object indicating a two-dimensional information input area by a light receiving means and causing a computer to identify input information corresponding to the operation of the object. A medium, the computer comprising: a zero cross point at which a slope of a change per unit time of a peak position of a detection signal of the light receiving unit according to a continuous information input operation by the object in the information input area becomes zero. A zero-crossing point detecting function to detect, a time interval detecting function to detect a time interval between the zero-crossing point and the end position of the continuous information inputting operation by the object, a continuous information inputting operation by the zero-crossing point and the object A predetermined threshold value for the time interval with the end position of the, and a comparison function of comparing the detected time interval, A program for executing an input information discriminating function for validating input information connecting the zero-cross point and the end position of the continuous information input operation by the object when the interval is larger than a predetermined threshold value. A stored computer-readable storage medium. 30. A computer-readable storage storing a program for detecting a predetermined object pointing to a two-dimensional information input area by a light receiving means and causing a computer to identify input information corresponding to an operation of the object. A medium, the computer comprising: a zero cross point at which a slope of a change per unit time of a peak position of a detection signal of the light receiving unit according to a continuous information input operation by the object in the information input area becomes zero. A zero-crossing point detecting function to detect; a time interval detecting function to detect a time interval between the zero-crossing point and a start position of a continuous information inputting operation by the object; a continuous information inputting operation by the zero-crossing point and the object. A predetermined threshold value for the time interval with the start position of the, and a comparison function of comparing the detected time interval, A program for executing an input information discriminating function for validating input information connecting the zero-cross point and a start position of a continuous information input operation by the object when the interval is larger than a predetermined threshold. A stored computer-readable storage medium. 31. A computer-readable storage medium storing a program for detecting a predetermined object indicating a two-dimensional information input area and causing a computer to identify input information corresponding to the operation of the object. A zero-cross point detection function for detecting a zero-cross point at which a gradient of a change per unit time of a two-dimensional position coordinate component according to a continuous information input operation by the object in the information input area becomes zero. A time interval detection function for detecting a time interval between the zero cross point and the end position of the continuous information input operation by the object; a time interval between the zero cross point and the end position of the continuous information input operation by the object. A predetermined threshold value and a comparison function of comparing the detected time interval, and the time interval is smaller than a predetermined threshold value. A computer-readable storage medium storing a program for executing an input information discriminating function for validating input information connecting the zero crossing point and the end position of the continuous information input operation by the object when the threshold is high. . 32. A computer-readable storage medium storing a program for detecting a predetermined object indicating a two-dimensional information input area and causing a computer to identify input information corresponding to the operation of the object. A zero-cross point detection function for detecting a zero-cross point at which a gradient of a change per unit time of a two-dimensional position coordinate component according to a continuous information input operation by the object in the information input area becomes zero. A time interval detection function for detecting a time interval between the zero-cross point and the start position of the continuous information input operation by the object; a time interval between the zero-cross point and the start position of the continuous information input operation by the object. A predetermined threshold value and a comparison function of comparing the detected time interval, and the time interval is smaller than a predetermined threshold value. A computer-readable storage medium storing a program for executing an input information discriminating function for validating input information connecting the zero-cross point and a start position of a continuous information input operation by the object in a case where it is difficult . 33. A two-dimensional position coordinate of a pointing means for designating a two-dimensional coordinate input / detection area which forms a plane or substantially a plane is detected based on a dip of a light intensity distribution detected by a light receiving means, and is used as drawing information. In the coordinate input / detection device for outputting, a zero cross point for detecting a zero cross point at which a gradient of a change per unit time of a dip position per unit time according to drawing based on a continuous instruction by the instruction means in the coordinate input / detection area becomes zero. Point detecting means, a post-bending duration detecting means for detecting a time interval between the zero cross point detected by the zero cross point detecting means and a position where the dip disappears, and a time between the zero cross point and the position where the dip disappears. Threshold storage means for storing a predetermined threshold value for an interval; and the time detected by the post-bending duration detection means. Comparison means for comparing the interval with a predetermined threshold value stored in the threshold value storage means; and only when the time interval detected by the post-bending duration detection means is greater than a predetermined threshold value, the zero-cross point and the dip And a flap / tome discriminating means for validating drawing information connecting the position where the mark disappears. 34. A two-dimensional position coordinate of a pointing means for designating a two-dimensional coordinate input / detection area which forms a plane or substantially a plane is detected based on a dip of a light intensity distribution detected by a light receiving means, and is used as drawing information. A method for identifying a splash / stop of drawing based on a continuous instruction by said instruction means in a coordinate input / detection device for output, wherein said instruction means in said coordinate input / detection area A zero-crossing point detecting step of detecting a zero-crossing point at which the inclination of a change per unit time of the dip position according to drawing by the drawing becomes zero; and a duration after bending detecting a time interval between the zero-crossing point and the position where the dip disappears. A detecting step, comparing a predetermined threshold value relating to a time interval between the zero-cross point and the position where the dip has disappeared with the detected time interval And a discrimination step for validating drawing information connecting the zero-cross point and the position where the dip has disappeared only when the time interval is greater than a predetermined threshold value. Method to identify splashes and tome. 35. A two-dimensional coordinate input / detection area for designating a two-dimensional coordinate input / detection area that forms a plane or substantially a plane is detected based on a dip of a light intensity distribution detected by a light-receiving means, and is used as drawing information. A storage, which is used for a coordinate input / detection device for outputting and stores a computer-readable program for causing a computer to identify “bounce” and “stop” of drawing based on a continuous instruction by the instruction means. A medium, wherein the program is configured to detect a zero cross point at which a slope of a change per unit time of a dip position in the coordinate input / detection area according to drawing by the instruction unit becomes zero, A post-bending duration detection function for detecting a time interval between the zero cross point and the position where the dip has disappeared; and the zero cross point A comparison function for comparing a predetermined threshold value with respect to the time interval with the position where the dip has disappeared and the detected time interval; and only when the time interval is larger than the predetermined threshold value, the zero cross point and the dip disappear. A storage medium characterized by causing the computer to execute a fly / tome discriminating function for validating drawing information connecting the position.