JPH1040349A - Rugged surface reflection type digital information display plate - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a digital information display plate low in cost and capable of facilitating detection by providing the plate with a digital information display part for optically detecting a combined group of recessed faces and projecting faces formed on a smooth surface by machinery. SOLUTION: An information display part 4 consisting of a combined group of recessed faces 2 and projecting faces 3 corresponding to number information displayed on a number plate 1 for an automobile is formed on the peripheral edge of the number plate 1. When the recessed faces 2 and projecting faces 3 are irradiated with light, convergent light is reflected on the recessed faces 2 and divergent light is reflected on the projecting faces 3. Since reflection on each recessed face 2 can be detected as a plane and reflection on each projected face 3 can be detected as a point at the time of receiving these reflecting light, these reflection can be clearly distinguished from the reflection of light from other light sources or reflection on faces other than the recessed and projecting faces and the existence state of the rugged surface on the plate 1 can be detected. When the rugged surface is arranged based on a fixed reference, its reflecting light can optically be detected as binary digital information.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a method for optically displaying, for example, information such as a number displayed on a number plate of an automobile and information contained in commuter passes and tickets as digital information. The present invention relates to an uneven reflection type digital information display plate suitable for easily and surely determining the information of a commuter pass, tickets and the like with a mechanical device.

[0002]

2. Description of the Related Art For example, in order to confirm a vehicle traveling a large number of vehicles for a certain purpose, the prior art uses a Doppler effect such as a microwave or an ultrasonic wave. Was adopted. In this case, taking a picture of the car itself is also meaningful,
By photographing the number plate, it becomes possible to confirm all the vehicles.

[0003]

Means for confirming and determining an automobile by photographing with a camera is, of course, effective, but it is difficult to accurately capture all of the automobiles that are traveling on a large number of vehicles. There is a problem that cannot be done accurately.

On the other hand, a number plate is always fixed to an automobile, and the contents of the automobile can be accurately grasped by detecting the number plate. In such a case, there is a method in which the license plate is photographed as it is and analyzed as video data, but instead, an information display portion capable of optically identifying the display content as digital information is provided integrally with the license plate. If possible, the content of the license plate can be clarified by electrically detecting the information display unit by, for example, a video system, so that information on the vehicle can be easily and accurately confirmed and determined. In addition,
In this case, the information display unit is required to be easily and inexpensively formed, to be durable, and to be capable of detecting the information at low cost.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, is formed simply and at low cost, and optically displays digital information so as to make its detection relatively easy. It is an object of the present invention to provide a digital information display plate having an uneven surface reflection type which can be used.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a concave surface forming a smooth surface for displaying digital information by reflecting an irradiated light beam as convergent light and diffuse light. And a convex / concave surface reflection type digital information display plate provided as a digital information display section for causing a mechanical device to optically detect a combination group of the convex and concave surfaces. More specifically, a combination group of the concave and convex surfaces is provided on a number plate of an automobile, and the uneven surface reflects an irradiated light beam as convergent light and diffused light so that the number plate can be viewed by a viewer. A digital information display unit is formed for digitizing and displaying characters, numbers, symbols, color types, and the like displayed on the display to optically detect the mechanical device. Further, a combination group of the concave surface and the convex surface is provided on the front side or the back side of the commuter pass, and the uneven surface thereof has the commuter pass by reflecting the irradiated light as convergent light and diffused light. A digital information display section for digitizing and displaying information so that the information is optically detected by a mechanical device is formed. Further, a combination group of the concave and convex surfaces is provided on tickets for identification of entrance / exit check, and the concave and convex surfaces reflect the irradiated light beams as convergent light and diffused light, thereby forming the ticket. A digital information display unit for digitizing and displaying information belonging to the class so that the mechanical device can optically detect the information; Furthermore, the concave surface and the convex surface are made of any one of gold, silver, platinum, aluminum and the like, or are plated with any of them, in order to reflect infrared rays well. is there.

[0007] For example, an information display section comprising a combination of concave and convex surfaces corresponding to the number information displayed on the number plate is formed on the periphery of the number plate of the automobile. When the concave and convex surfaces are irradiated with light, convergent light is reflected from the concave surface and diffused light is reflected from the convex surface. Therefore, by receiving these reflected lights, the reflection from the concave surface is detected by the surface, the reflection from the convex surface is detected by the point, and the reflection of light from other light sources and the reflection from other than the uneven surface are clearly defined. The presence state of the uneven surface on the plate can be detected. If the uneven surface is arranged according to a certain standard, the reflected light can be optically detected as binary digital information. Thus, the contents displayed on the number plate can be confirmed with certainty.

A method of determining a timing at which a computer makes a decision on digital information optically captured by a camera in real time, or a shutter chance for temporarily storing the digital information as still video data for storage and later decision. Can be automatically determined by a mechanical device to determine whether the focal position of convergent light from the concave surface or the sensitivity of diffused light from the convex surface is appropriate. In some cases, the optimal size of the image of the combination of the uneven surfaces is detected and determined at the moment, so the curve of the uneven surface, the size of the uneven surface itself, and the mutual arrangement interval are determined by light rays. It is necessary to adjust according to the conditions of the irradiation and the information reading device.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a digital information display plate according to the present invention. In the following embodiment, a number plate fixed to an automobile is adopted as a plate, and the number formed on the number plate is digitized and displayed. Of course, the present invention can be applied to various information displays other than the above, for example, from a large signboard level to a small ticket or lower. In addition,
In the following description of the present example, the concave / convex surface of the digital information display portion in the concave / convex surface reflection type digital information display plate is circular. You. In this example, a 4-bit system is adopted as a digital display system. However, the present invention is not limited to this, and may be applied to an 8-bit system and other transmission coding systems.

FIG. 1 shows a plate 1 according to the invention. As described above, the plate 1 is provided by a transportation-related agency for a number plate. As shown, A, B, C, D, E, F, G, H
Are formed. In addition, as the specifics of the above-mentioned symbols, A is "Omiya", B is 5, C is 3, D
E is 1, F is 2, G is 3, H is 4, and the like.

On the periphery of the plate 1, a large number of concave and convex portions including a concave surface 2 (indicated by a mark) and a convex surface 3 (indicated by a mark) are formed as an information display section 4.
In this example, the information display section 4 is formed in the X, Y, and Z columns. As shown in FIG. 2, the combination group of the concave surface 2 and the convex surface 3 forms one set of information such as a number. In the present example, the information display unit 4 is displayed by the 4-bit method, but the information display unit 4 is not limited to this as described above, and may be displayed by the multi-bit method or another transmission code method.

In this example, the upper row of the two rows in column X in FIG. 1 represents the first bit, the lower row represents the second bit, the upper row of the two rows in the Y column represents the third bit, and the lower row represents the first bit. The fourth bit is displayed. Note that three concave surfaces 2 or three convex surfaces 3 are formed in one frame from the first bit to the fourth bit, respectively, in order to ensure the reading accuracy.
The number may be one or two, or three or more.

On the other hand, the portion of the Z column between the X column and the Y column is
The leftmost column in the figure represents the first bit, the next column represents the second bit, the rightmost column on the right represents the third bit, and the rightmost column represents the fourth bit. In the column Z, one bit is displayed by three concave surfaces 2 or three convex surfaces 3 in the same manner as described above, but in order to improve the reading accuracy in the same manner as described above.

As described above, the above-mentioned number can be displayed by the information display section 4 composed of a combination group of the 4-bit type uneven surface displayed in the X column, the Y column and the Z column. In order to display digital information using the concave surface 2 and the convex surface 3, for example, the concave surface 2 may correspond to 1 and the convex surface 3 may correspond to 0, or the concave surface 2 may be appropriately distinguished so as to correspond to ON and the convex surface 3 to OFF. That is, the concave surface 2 in FIG.
Is 0, the digital display second column 6 in the second column of FIG.
In FIG. 2, the first to fourth bits are represented by ◎, which corresponds to 1011 as shown in FIG. 2, and a number can be detected from this code string. Also, since the characters on the number plate are relatively limited,
Character conversion can be performed even in a 4-bit system by using a correspondence table with numbers and the like. For example, if an 8-bit method is adopted, many characters and symbols other than numbers can be displayed. As described above, digital display corresponding to the numbers A, B, C, D, E, F, G, and H of the number plate can be performed by the information display unit 4 in which the concave surface 2 and the convex surface 3 are combined.

There are as many number plates as the number of automobiles, and the number varies from one automobile to another. However, the information display unit 4 comprising the combination of the concave surface 2 and the convex surface 3 can accurately display the numbers. . Further, as described above, since the concave surface 2 and the convex surface 3 can be easily press-formed, the plate 1 can be implemented at a very low cost.
In FIG. 1, marks ● at the four corners of the plate 1 are conveniently provided as reference points 5 for determining the positions of the concave surface 2 and the convex surface 3 and an identification mark for optically detecting the presence of a number plate. For example, it is also useful to have a special structure that is easily distinguishable from other uneven surfaces, such as a composite shape of unevenness.

[0016]

【The invention's effect】

1) According to the concave / convex surface reflection type digital information display plate according to claims 1 to 4 of the present invention, digital information can be optically displayed.
And information detection is performed reliably. Therefore, the present invention is applied to reading of non-contact type commuter passes, entrance / exit presentation tickets, and the like, in addition to reading of automobile number plate information. 2) According to the concave / convex surface reflection type digital information display plate according to claim 5 of the present invention, since the light applied to the information display section is composed of infrared rays, it does not hinder human visual activity and has a concave / convex surface. Can be assured.

[Brief description of the drawings]

FIG. 1 is a plan view showing the entire structure of a plate according to the present invention.

FIG. 2 is a schematic diagram illustrating an example of a relationship between a concave surface and a convex surface of an information display unit including a combination group of a concave surface and a convex surface and an information transmission code in an easily understandable manner.

[Explanation of symbols]

 1 Plate 2 Concave surface 3 Convex surface 4 Information display part (X, Y, Z) 5 Reference point (identification mark) 6 Digital display second column

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[Procedure amendment]

[Submission date] September 27, 1996

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0012

[Correction method] Change

[Correction contents]

In this example, the upper row of the two rows in column X in FIG. 1 represents the first bit, the lower row represents the second bit, the upper row of the two rows in the Y column represents the third bit, and the lower row represents the first bit. The fourth bit is displayed. Although in one frame are formed respectively three concave 2 or convex 3 from the first bit to the fourth bit, which is in order to reliably read accuracy,
The number may be one or two, or three or more.

Claims (5)

[Claims] 1. A digital device for optically detecting a combination of concave and convex surfaces forming a smooth surface for displaying digital information by reflecting an irradiated light beam as convergent light and diffuse light. An uneven reflection type digital information display plate provided as an information display section. 2. A combination group of the concave surface and the convex surface is provided on a number plate of an automobile, and the concave and convex surfaces thereof are
The number plate is digitized in order to optically detect a character, a number, a symbol, a color type, and the like displayed to the viewer by reflecting the irradiated light beam as a convergent light and a diffused light. The digital information display plate according to claim 1, wherein a digital information display portion for displaying the information is formed. 3. A combination of the concave and convex surfaces is provided on the front side or the back side of the commuter pass, and the uneven surface of the commuter pass reflects the irradiated light beam as convergent light and diffused light. 2. A digital information display section for digitizing and displaying information to be optically detected by a mechanical device and displaying the information.
An uneven surface reflection type digital information display plate as described in. 4. The combination of concave and convex surfaces is provided on tickets for identification of entrance / exit check,
Digital information for digitizing and displaying information possessed by the tickets by a mechanical device by reflecting the irradiated light rays as convergent light and diffused light by reflecting the irradiated light rays as convergent light and diffused light. 2. The digital information display plate according to claim 1, wherein an information display portion is formed. 5. The method according to claim 1, wherein the concave surface and the convex surface are made of any one of gold, silver, platinum, aluminum and the like or plated with any of them in order to reflect infrared rays well. The uneven surface reflection type digital information display plate according to claim 1.