| 摘要 |
PURPOSE: A touch screen device based on retro-reflection is provided to efficiently confirm the positions of touch-operations by receiving light from light source units based on the retro-reflection. CONSTITUTION: A touch-surface is arranged on a substrate member(110). A light source part(130) emits scanning light to the substrate member. A retro-reflection part(120) implements retro-reflection with respect to the scanning light. A light receiving part(140) receives retro-reflected scanning light. A controlling part(170) detects the position coordinate of a touched object based on the scanning light emitting angle of the light source part and the scanning light receiving information of the light receiving part. |
