| 摘要 |
A touch panel including a light guide plate, a plurality of light sources and a plurality of detectors is provided. The light guide plate has a top surface, a bottom surface, a plurality of side surfaces and a plurality of light incident surfaces. The light sources are disposed at the light incident surfaces of the light guide plate, and the light sources have a photocell total reflection angle (α) and a photocell vertical divergence angle (&bgr;) corresponding to the light incident surfaces of the light guide plate, wherein &thetas;<α<60°, &thetas; is a critical angle of the total reflection angle of the light guide plate, and &bgr;<50°. The detectors are disposed corresponding to the light sources so as to receive photocell signals from the light sources. |
