| 摘要 |
<p>PURPOSE: A touch screen device using multi reflection is provided to compose a little light source and a light receiving sensor, thereby reducing manufacturing costs. CONSTITUTION: A substrate member includes a touch surface. An optical source unit(120) emits a diffused light into the substrate member. A parabolic reflection member(140) changes the diffused light to a collimated light. A pattern reflection member(130) reflects the collimated light into a specific direction. A receiving unit(150) receives a light reflected by the pattern reflection member. A controlling unit(170) detects a position coordinate of an object touched in the touch surface based on position information of the light reflected and receiving information received through the receiving unit.</p> |
