JP2001159784A - projector - Google Patents

Abstract

(57) [Problem] To provide a projector capable of flexibly responding to a change in screen size, and to flexibly respond to a change in screen size, to constitute an image position or coordinate input device. Provided is a projector capable of easily adjusting a coordinate detection device. In a projector, for example, a rear projector or the like, a structure is provided in which the screen section and the main body section can be separated, and screen sections of various sizes can be placed on the main body section so that the screen size can be changed. Constitute.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a projector, and more particularly, to a rear projector or the like which can flexibly cope with a change in screen size and adjusts a coordinate detection device constituting an image position or coordinate input device. It is intended to realize a projector that can easily perform the projector.

[0002]

2. Description of the Related Art In recent years, there has been a tendency for an image display device to have a larger screen. For example, as one of methods for realizing a large screen, a rear projection type image display device is known. That is, the image displayed from the image display device serving as the image source,
Enlarged by the projection lens and projected on the back of the screen,
The observer watches the transmitted image on the other side of the screen. Also, with the increase in the screen size of the image display device,
A coordinate input device used to control a computer connected externally or to write characters and graphics by directly inputting coordinates on the screen with a pointing device has been developed and installed on image display devices. I have.

[0003] Conventionally, a rear projection type image display apparatus uses a reflection mirror to project the image on a screen in order to shorten the depth direction of a housing. As shown in FIG. 1 (see also FIG. 4), the image display device projects an image from the image source 1 onto a reflection mirror 27 arranged on a housing back plate 36 and arranges the image on the front of the housing. The image is projected on a thin screen 30, and its components are composed of the image source 1 and the reflection mirror 27.
And a screen part 32 having the screen 30. As for the coordinate input device, in the coordinate input device including the pointing device for generating the light spot and the coordinate detecting device for detecting the light spot generated from the pointing device, the coordinate detecting device 26 is provided inside the casing 37. Placed in In the image display device and the coordinate input device, the adjustment of the image display position and the coordinate input is performed by:
The image display position is adjusted with respect to the screen unit 32 when the video source is installed, and the coordinate input device is adjusted with respect to the screen unit 32 when the coordinate detection device is installed.

[0004]

However, in the case of the housing structure composed of the screen portion 32 and the housing 37 as in the above-described conventional image display device shown in FIG. To change 32, all the members of the housing 37 had to be changed. In addition, the size of the housing increases with the increase in the screen size of the image display device, and it is becoming difficult to design with sufficient accuracy in relation to the bending and cost of each member and the processing accuracy. Since the dimensional accuracy of each member and the optically required dimensional accuracy are in a contradictory relationship when the screen is enlarged, the image source 1 and the reflection mirror 2 installed on the back plate 36 are used.
7 shows that the influence on the display image due to the displacement of the relative position 7 increases as the screen size increases. In some cases, display of an image on a screen is partially impossible. However, it is extremely difficult to adjust the image display position and the coordinate detecting device 26 after the video source 1 and the coordinate detecting device 26 are assembled in the housing.

Accordingly, an object of the present invention is to solve the above-mentioned problems in the conventional art and to provide a projector capable of flexibly responding to a change in screen size. It is another object of the present invention to provide a projector that can flexibly cope with a change in screen size and that can easily adjust an image position or a coordinate detection device constituting a coordinate input device.

[0006]

SUMMARY OF THE INVENTION The present invention provides a projector having the following constructions (1) to (10) to achieve the above object. (1) A projector characterized in that screen parts of various sizes can be placed on the main body so that the screen size can be changed. (2) A projector having a structure in which a screen section and a main body section can be separated, and screen sections of various sizes can be mounted on the main body section so that the screen size can be changed. (3) The projector is provided with a reflection mirror on the rear side of the device, a screen unit for projecting and displaying an image on a screen via the reflection mirror, and detecting a position on the screen and inputting a signal to the detected position. The projector according to (1) or (2), further comprising: a coordinate input device for performing the operation; and a video output unit. (4) In the image output means and the coordinate input device,
By configuring these video output means and coordinate input device as a unit, the position adjustment between the video output range of the video output means and the input range of the coordinate input device is completed within the unit. The projector according to the above (3), wherein: (5) The separation structure between the screen part and the main body part is as follows:
Any of the above (2) to (4), wherein the screen part is divided into one casing and the main body part is divided into the other casing. The projector described in Crab. (6) The separation structure between the screen part and the main body part is as follows:
(2) to (2) to (2), wherein the screen portion and the main body have a housing structure capable of being divided, and a projection distance of the housing of the main body to the screen portion can be changed. The projector according to any one of 4). (7) The above-mentioned (1) to (6), wherein the screen portion and the main body portion are aligned with a positioning pin provided on one of the screen portion and the main body portion. The projector according to any one of the above. (8) The above-mentioned (1) to (7), wherein the screen section and the main body section are configured to be aligned by correcting a displacement of a display screen or a distortion of the screen.
The projector according to any one of the above. (9) Positioning by correcting positional deviation of the display screen or distortion of the screen is performed by fitting a positioning pin provided on one of the screen part and the main body part with a long hole, and the screen. The projector according to (8), wherein the projector is configured to perform adjustment by relative movement or rotation between the unit and the main unit. (10) A projector connected to an arithmetic device such as a computer for inputting image information, wherein the projector has the configuration described in any one of (1) to (9) above.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The projector disclosed in the present embodiment adopts a structure capable of separating a screen portion from a main body portion as described above, so that the screen portion can be simply positioned on the main body portion and replaced. In addition, it is possible to easily change the screen size. This will be described with reference to FIG. 4 for an example employing a housing structure. In the figure, the housing structure of the rear projection type image display device provided with a rear mirror includes a housing lower part 28 on which the image source 1 can be installed,
A rear mirror 27 is provided, and is configured to be splittable into an upper part 33 of the housing where the screen part 32 is installed. At this time, the image source 1 and the coordinate detection device 26 are installed in the adjustment unit 34, and the adjustment unit 34 is
8

Further, with respect to the adjustment unit section 34, the image source 1 can be adjusted in the vertical and horizontal directions, the rotation direction, the falling direction, etc. with respect to the housing lower part 28. Can be adjusted. And
The housing structure of the rear projection type image display device provided with the rear mirror can be divided into an upper housing portion 33 and a lower housing portion 28. The size can be changed. further,
In the image display device, an image source 1 and a coordinate detection device 2
By mounting and adjusting the image source 6 in the adjustment unit section 34 and mounting it on the lower portion 28 of the housing, it is possible to easily perform the adjustment after the video source 1 is mounted inside the housing. And
By expanding the range of adjustment, it is possible to obtain a structure that is less dependent on the mounting of the image source 1, the accuracy of the housing, and errors in the vertical connection of the housing.

In the image display device equipped with the coordinate input device, if the relative distance between the optical axis and the image source 1 is always the same, the coordinate detecting device 26 can detect the light spot regardless of the size of the housing upper part 33. Can be detected. Therefore, in the structure in which the adjustment unit 34 is mounted, the image source 1 and the coordinate detection device 2 are installed before the adjustment unit 34 is installed in the housing.
6, and it is not necessary to adjust the coordinate detection device 26 after installing the adjustment unit 34 on the lower part 28 of the housing.

[0010]

Next, an embodiment of the present invention will be described.
First, a brief description of the coordinate detecting device will be given. FIG.
FIG. The coordinate detecting device is roughly divided into an indicator 31 for forming a light spot on the screen 30 as a coordinate input surface, and a coordinate detector for detecting the position coordinates and the like of the light spot 35 on the screen 30. 3
1 is a semiconductor laser that emits a light beam, or an LED
And the like, and a light emission control means for driving and controlling the light emission, a plurality of operation switch means, and a power supply means such as a battery. The light emission control means performs light emission control in which a control signal is superimposed by ON / OFF of light emission and a modulation method according to the state of the operation switch.

The arrangement relationship between the two linear sensors 40X and 40Y is as shown in FIG. The images of the light spot 35 are formed on the sensors 41X and 41Y on the linear sensors 91X and 91Y by the cylindrical lenses 90X and 90Y as the image forming optical system. By accurately arranging these two sensors at right angles, an output having a peak at a pixel reflecting the X coordinate and the Y coordinate is obtained. These two sensors are controlled by the sensor control means, and the output signal is sent to the coordinate calculation means as a digital signal by the AD conversion means connected to the sensor control means, and the output coordinate value is calculated. Along with data such as a control signal from the detection means, the data is transmitted to the external control device by a predetermined communication method via the communication control means.

FIGS. 2 to 5, 9 and 10 show the configuration of an embodiment of the present invention. In these figures, reference numeral 1 denotes a device for projecting an image (image source), and three image source fixing swing plates A (a metal plate for fixing the image source 1) are fixed to ten image source fixing bands (the image source 1 is fixed). It is fixed together with 9 image source supporting plates (sheet metal for reinforcing the fixing of the image source 1) and 25 coordinate detection device fixing plates. 26 coordinate detecting devices are fixed to 25 coordinate detecting device fixing plates.
Eleven coordinate detection device substrate fixing plates are fixed to nine image source support plates. The units of the image source fixing tilting plate A, the image source supporting plate 9, the image source fixing band 10, the coordinate detecting device substrate fixing plate 11, the coordinate detecting device fixing plate 25, and the coordinate detecting device 26 of the image sources 1 and 3 are as follows. 2 is attached to the image source fixed tilt plate B, and can be adjusted with respect to the screen 30 shown in FIG. The angle is adjusted so as to be incident at a right angle, so that trapezoidal distortion in the X direction can be corrected.

Next, the tilting auxiliary plate A 8 is attached to the two image source fixing tilting plates B, and the two image source fixing tilting plates B are mounted to the left and right side plates 4a and 4b.
The screen 30 shown in FIG. 10 can be adjusted in the X direction by using the six adjustment knobs B, whereby the optical axis in the Y direction is adjusted so as to enter the screen 30 at right angles. Thus, the trapezoidal distortion in the Y direction can be corrected. At this time, the tilting auxiliary plate B of 7 is 4a, 4b
Attached to the left and right side plates. Next, the left and right side plates 4a and 4b are fixed to 21 θ adjustment plates, and the 21 θ adjustment plates are 2
2 can be rotated with respect to the Y adjustment plate.
Can be adjusted by adjusting 17 adjustment knobs C for 30 screens. The θ adjustment plate 21 is fixed to the Y adjustment plate 22, and the Y adjustment plate 22 is
3 is fixed to the X adjustment plate. At this time, the Y adjustment plate 22 is configured to be movable in the Y direction with respect to the X adjustment plate 23, and by adjusting the adjustment knob D of 18, the position of the screen position in the Y direction with respect to the screen 30 is adjusted. Make corrections. next,
The 23 X adjustment plates are fixed to the 24 adjustment unit fixing plates. At this time, the X adjustment plate 23 is configured to be movable in the X direction with respect to the adjustment unit fixing plate 24,
With 19 adjustment knobs E, X for 30 screens
Correct the position of the screen in the direction. Then, the entire code 34
Is positioned and fixed to the 28 housing.

Next, as shown in FIG. 5, the 26 coordinate detecting devices are provided with respect to the 25 coordinate detecting device fixing plates as shown in FIG.
It has a structure that can be adjusted in four directions. The key can be rotated and adjusted with respect to the optical axis of the coordinate detecting device, and can adjust the relative position of θ with the image source 1. , 26 coordinate detection devices are applied to the image source 1 by X
The relative positions in the directions can be adjusted. The angle can be set by adjusting the optical axis of the coordinate detecting device with respect to 30 screens at a right angle in the X direction. Therefore, the image source 1 and the coordinate detection device 26
The right angle of the optical axis of the direction can be obtained. U can adjust the coordinate detection device 26 relative to the image source 1 in the Y direction. U can be obtained by adjusting the optical axis of the coordinate detecting device with respect to the screen 30 at a right angle in the Y direction. Therefore, the image source 1 and the coordinate detecting device 26 can adjust the optical axis of the Y direction with respect to the screen 30. Can make a right angle. By making these adjustments, as shown in FIG. 4, the optical path of the coordinate detecting device and the optical path of the image source can be adjusted by A, and the optical path of the coordinate detecting device and the image source Can be adjusted by B.

FIGS. 6, 7 and 8 show another embodiment according to the present invention. In these figures, 33
The screen unit housing and the main unit housing are separated from each other, and the main unit housing including the adjustment unit is connected to the screen unit as shown in FIGS. By changing the projection distance even if the size changes, it is possible to make the housing of the 28 main bodies common.

Next, the positioning of the upper and lower housings will be described with reference to the drawings. Here, FIGS. 11, 12, and 13
FIG. 3 is a perspective view illustrating positioning of upper and lower housings. Also,
FIG. 14 is a cross-sectional view for explaining the connecting portion of the upper and lower housings in detail, and FIGS. 15, 16, 17, and 18 are display images before the position of the display area is adjusted with respect to the screen. . In the figure, 38 is a display area, 39a, 3
9b and 39c are positioning pins, 42a and 42c are positioning holes, 43 is an upper and lower housing connecting screw, 44 is a washer,
5a, 45b, 45c, 45d are upper and lower housing connection holes, 46
Reference numerals a, 46b, 46c, and 46d denote upper and lower housing connection fixing bits, and reference numerals 47a, 47b, 47c, and 47d denote upper and lower housing connection holes.

First, as a first mode of positioning the upper and lower housings, positioning holes 42a and 42b are provided in the upper portion 33 of the housing in FIG. 11, and the positioning holes 39a are provided in the lower portion 28 of the housing. , 39b are set up and down so as to fit into each. Then, the housing upper part 3
3 and the housing lower part 28 are set in a state where the relative positions are determined as shown in FIG. Then, in order to connect the upper and lower housings, upper and lower housing connecting holes 45a and 45 shown in FIG.
b, 45c, and 45d are respectively passed through the upper and lower case connecting screws 43, and the upper and lower case fixing bits 4 installed in the lower portion 28 of the case.
The upper and lower housings 33 and 28 are connected and fixed as shown in FIG. 12 by fixing with 6a, 46b, 46c and 46d. Next, as a second form of positioning of the upper and lower casings, a slot 42c for positioning is provided in the upper part 33 of the casing in FIG. The elongated hole 42c is provided with a positioning pin 3 provided in the lower portion 28 of the housing.
9c, the housing upper part 33 can be adjusted with respect to the housing lower part 28 in the X direction of e or f or the rotation direction of g or h. However, in the Y direction, if the projection distance changes, the size of the display area 38 changes, so it is necessary to fix it.

Next, the adjustment method will be described.
Display is made on the screen with the configuration of FIG. As shown in FIG. 15, when the display area 38 has no trapezoidal distortion and a <b, the housing upper part 33 is moved in the f direction so that a = b. Further, as shown in FIG. 16, when the display area 38 has no trapezoidal distortion and a> b, the housing upper part 33 is moved in the direction e so that a = b. When the display area 38 has a trapezoidal distortion such as c> d as shown in FIG. 17, the upper part 33 of the housing is rotated and adjusted in the h direction to correct the trapezoidal distortion. At this time, the trapezoidal distortion is corrected, but the balance between a and b is lost, so that adjustment in the X direction is performed so that a = b. When the display area 38 has a trapezoidal distortion such as c <d as shown in FIG. 18, the upper part 33 of the housing is rotationally adjusted in the g direction to correct the trapezoidal distortion. At this time, the trapezoidal distortion is corrected, but the balance between a and b is lost. Therefore, adjustment in the X direction is performed so that a = b.

Next, connection of the upper and lower housings after the display area 38 is corrected will be described. As shown in FIG. 14, the upper housing 33 is not always fixed at a fixed relative position with respect to the lower housing 28. Therefore, the upper and lower housing connection holes 47 are connected to the upper and lower housing connection holes 45 in FIG. It is wider than in the case of. This is because the relative position of the upper and lower housings is
Even if it is not determined as in 1, the upper and lower housing connecting screws 43
This is to eliminate an obstacle that the upper and lower housings cannot be assembled when the upper and lower housings are connected. Also, by inserting the washer 44, the upper and lower housing connecting holes 47 which are widely opened are functionally supplemented.

As described above, by configuring the screen portion and the main body portion to be separable, the screen size can be easily changed only by replacing the screen portion with the main body portion. In the case where the number of variations is increased, it is possible to advantageously cope with the cost, and it is possible to obtain a configuration particularly suitable for a rear projector or the like. In addition, by making the structure for separating the screen unit and the main body unit into a splittable housing structure, the screen size can be easily changed even by the end user, and the image output unit and the coordinate input device are united. By doing so, it is possible to easily perform adjustment after changing the housing. In addition, since the adjustment of the relative positional relationship between the image output means and the coordinate detection device that constitutes the coordinate input device can be completed in advance outside the housing by the unitization, the unit is placed in the housing afterward. It can be installed only by correcting the position with respect to the screen. In addition, the relative position between the image output means and the coordinate detection device can be maintained without depending on the accuracy of the housing, an error in the connection between the upper and lower housings, etc., so that it is not necessary to individually adjust each of the housings. The unitization described above can easily absorb the limit of the dimensional accuracy in increasing the size of the image display device itself as the screen size increases.

[0021]

As described above, according to the present invention, it is possible to realize a projector that can flexibly respond to a change in screen size.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a conventional image display device.

FIG. 2 is a diagram illustrating an overall configuration of an adjustment unit in the projector according to the embodiment of the invention.

FIG. 3 is an exploded view of the adjustment unit shown in FIG. 2;

FIG. 4 is a diagram showing an overall configuration of a projector according to the embodiment of the present invention.

FIG. 5 is a diagram for explaining an adjustment structure by the coordinate detection device according to the embodiment of the present invention.

FIG. 6 is a diagram showing another configuration of the projector according to the embodiment of the invention.

FIG. 7 is a diagram illustrating another configuration of the projector according to the embodiment of the invention.

FIG. 8 is a diagram showing another configuration of the projector according to the embodiment of the invention.

FIG. 9 is a diagram for explaining functions of the coordinate detection device.

FIG. 10 is a diagram for explaining position adjustment of the image source with respect to the screen.

FIG. 11 is a perspective view illustrating positioning of upper and lower housings.

FIG. 12 is a perspective view illustrating positioning of upper and lower housings.

FIG. 13 is a perspective view illustrating positioning of upper and lower housings.

FIG. 14 is a cross-sectional view for explaining a connecting portion between the upper and lower housings in detail.

FIG. 15 is a diagram showing a display image before the position of the display area is adjusted with respect to the screen.

FIG. 16 is a diagram showing a display image before the position of the display area is adjusted with respect to the screen.

FIG. 17 is a diagram showing a display image before the position of the display area is adjusted with respect to the screen.

FIG. 18 is a diagram showing a display image before the position of the display area is adjusted with respect to the screen.

[Explanation of symbols]

1: Image source for outputting images 2: Image source fixed tilt plate B 3: Image source fixed tilt plate A 4a, 4b: Left and right side plates 5a, 5b: Left and right handles 6: Adjustment knob B 7: Tilt auxiliary plate B 8: Tilt auxiliary Plate A 9: Image source support plate 10: Image source fixing band 11: Coordinate detection device substrate fixing plate 12: Shield plate 13: Adjusting unit fixing plate A 14: Adjusting unit fixing plate B 15: Adjusting unit fixing plate C 16: Fixing Auxiliary plate 17: Adjustment knob C 18: Adjustment knob D 19: Adjustment knob E 20: Adjustment knob A 21: θ adjustment plate 22: Y adjustment plate, 23: X adjustment plate 24: Adjustment unit fixing plate 25: Coordinate detection device fixing Plate 26: Coordinate detection device 27: Reflection mirror 28: Lower housing 29: Caster 30: Screen 31: Pointer 32: Screen unit 33: Upper housing 34: Adjustment unit 35: Optical switch Unit 36: Back plate 37: Housing 38: Display area 39a, 39b, 39c: Positioning pin 40X, 40Y: Linear sensor 41X, 41Y: Sensor 42a, 42b, 42c: Positioning hole 43: Upper and lower housing connecting screw 44: Washers 45a, 45b, 45c, 45d: Upper and lower housing connection holes 46a, 46b, 46c, 46d: Upper and lower housing connection fixing bits 47a, 47b, 47c, 47d are upper and lower housing connection holes 90X, 90Y: Cylindrical lenses 91X, 91Y : Image formation

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) H04N 5/74 H04N 5/74 C

Claims (10)

[Claims] 1. A projector characterized in that screen portions of various sizes can be placed on a main body portion so that the screen size can be changed. 2. The projector according to claim 1, further comprising a structure capable of separating the screen portion from the main body portion, wherein screen portions of various sizes can be mounted on the main body portion so that the screen size can be changed. 3. A projector, wherein the projector has a reflection mirror on the rear side of the device, and a screen unit for projecting and displaying an image on a screen via the reflection mirror, and detecting a position on the screen and transmitting a signal to the detected position. 3. The projector according to claim 1, further comprising a coordinate input device for inputting and an image output unit. 4. The image output means and the coordinate input device, wherein the image output means and the coordinate input device are unitized, so that the output range of the image of the image output means and the input range of the coordinate input device are defined. 4. The projector according to claim 3, wherein the position adjustment is completed within the unit. 5. A separation structure between the screen portion and the main body portion is a housing structure which can be divided into two, wherein the screen portion is provided in one housing and the main body portion is provided in the other housing. The projector according to claim 2, wherein the projector is divided. 6. A separation structure between the screen portion and the main body portion is a housing structure in which the screen portion and the main body portion can be divided, and a projection distance of the main body housing to the screen portion is reduced. The projector according to claim 2, wherein the projector is configured to be changeable. 7. The apparatus according to claim 1, wherein said screen portion and said main body portion are configured to be positioned by positioning pins provided on one of said screen portion and said main body portion. 2. The projector according to claim 1. 8. The apparatus according to claim 1, wherein said screen portion and said main body portion are aligned by correcting a displacement of a display screen or a distortion of the screen.
The projector according to any one of the preceding claims. 9. An alignment method for correcting a position shift of the display screen or a distortion of the screen by fitting a positioning pin provided on one of the screen part and the main body part with a long hole, The projector according to claim 8, wherein the projector is configured to perform the relative movement or the rotation adjustment between the screen unit and the main body unit. 10. A projector connected to an arithmetic device such as a computer for inputting image information, wherein the projector has the configuration according to any one of claims 1 to 9.