JPH0420133U - - Google Patents

Description

[Brief explanation of the drawing]

Figure 1 is a block diagram showing the principle configuration of the present invention.
FIG. 2 is a hardware configuration diagram showing a first embodiment of the present invention, FIG. 3 is a hardware configuration diagram showing a second embodiment of the present invention, and FIG. 4 is a diagram showing a specific example of FIG. 2. Figure 5 is a flowchart for explaining the coordinate detection procedure in Figure 4, Figure 6 is a diagram showing a specific example of Figure 3, and Figure 7 is a flowchart for explaining the coordinate detection procedure in Figure 6. 8 is a perspective view showing an example of the arrangement of the coordinate input section of a general optical matrix switch device, FIG. 9 is a diagram showing an example of the circuit of a general optical matrix switch device, and FIG. 10 is a diagram showing the operation of FIG. 9. 11 is a block diagram showing an example of a conventional optical coordinate detection device, FIG. 12 is a diagram showing an example of a circuit of the first light receiving section or the second light receiving section, and FIG. Figure 13 shows the state of the optical matrix section when the operator specifies the position, Figure 14 shows the illuminance distribution and phototransistor output voltage distribution in the x-coordinate direction, and Figure 15 shows the y-coordinate direction. FIG. 3 is a diagram showing the illuminance distribution and the output voltage distribution of the phototransistor in the coordinate direction. In the figure, 1... optical matrix section, 1a...
First light source, 1b...first light receiving section, 1c...second light source, 1d...second light receiving section, 2...first distribution detecting section, 3...second distribution detecting section , 4...First calculation section, 5...Second calculation section, 6...First polarity change detection section, 7...Second polarity change detection section, 8...
... Selection section, 9... Coordinate estimation section.

Claims (1)

[Claims for Utility Model Registration] A first light source 1a and While arranging the first light receiving section 1b, the second light receiving section 1b is arranged.
A second light source 2a and a second light source facing each other in the coordinate direction
an optical matrix section 1 in which a light receiving section 2b is arranged to form a light matrix; and when the position is specified within the position specification area, the first and second light receiving sections in the optical matrix section 1 are arranged. The first and second light sources 1 receive light from 1b and 1d, respectively.
a, 1c according to the amount of light from the first and second
A first distribution detection section 2 and a second distribution detection section 3 that respectively detect the light amount distribution in the coordinate direction; a first calculation section 4 and a second calculation section that respectively calculate the average coordinates of each of the detected light amount distributions. unit 5; and a coordinate estimating unit 9 for estimating first and second coordinates of the designated position from each of the calculated average coordinates, the optical coordinate detection device comprising: a first polarity change detection unit 6 that detects how many points there are at which the polarity of a change in light amount changes in the light amount distribution; and a first polarity change detection unit 6 that detects how many points there are at which the polarity of a change in light amount changes in the light amount distribution with respect to the second coordinate direction. The number of points detected by the second polarity change detection section 7 and each of the first and second polarity change detection sections 6 and 7 is 1.
an optical coordinate detection device characterized by comprising: a selection unit 8 for selecting whether or not the coordinate estimation unit 9 should perform the coordinate estimation according to whether or not the coordinate estimation unit 9 performs the coordinate estimation;