| 摘要 |
<p>PURPOSE: A touch screen is provided to prevent a dead zone where touch recognition is impossible. CONSTITUTION: A lens(130) includes a viewing angle of 90 to 100 degrees to remove a sensing unavailable area of a touch location in a touch screen. A filter(120) transmits reflection light except for an infrared area to the lens. In a sensing unit(140), the reflection light are imaged. A determination unit(150) distinguishes the touch location and touch size using the imaging.</p> |
