| 摘要 |
An optical touch panel includes a plurality of light-emitting elements, reflectors for reflecting lights from the plurality of light-emitting elements, and a plurality of light-receiving elements for receiving reflected lights from the reflectors. The plurality of light-emitting elements and the plurality of light-receiving elements are arranged alternately along two adjacent sides of a rectangular position-detecting surface, and the reflectors are arranged along the other two adjacent sides of the position-detecting surface, respectively. A drive controller causes the plurality of light-emitting elements to light in a predetermined order to thereby cause ones of the light-receiving elements arranged on opposite sides of each of the plurality of light-emitting elements to receive reflected lights from the reflectors. Hollow cylinders opposed to the respective light-receiving elements inhibit lights other than the reflected lights reflected by the reflectors from being incident on the plurality of light-receiving elements.
|
