| 摘要 |
PROBLEM TO BE SOLVED: To easily recognize the position of an information input tool such as a touch panel by an image processing system and to put a virtual image of an image display device, etc., together with a virtual image of the information input tool. SOLUTION: The touch panel 1 with a reference surface setting function capable of picking up an image is equipped with four light emitting diodes LED1 to LED4 which are fitted at specific positions in the peripheral area of its information input surface and a blink control circuit 13 which controls the input and output of the light emitting diodes LED1 to LED4, and this blink control circuit 13 performs blink control so that the blink patterns of the light emitting diodes LED1 to LED4 are different. When an image of the touch panel 1 is picked up by a special photography device like a panning CCD device, this constitution makes it easy to specify the positions of the light emitting diodes LED1 to LED4 as compared with a case when the illumination patterns of the light emitting diodes LED1 to LED4 are brought under non-blinking control. |
