| 主权项 |
1. An optical touch system, comprising:
a touch screen; a plurality of light sources, for periodically emitting light; a light pen, for performing touch operations on the touch screen and periodically emitting light when the plurality of light sources are not emitting light; a light-reflecting element, operated on the touch screen and reflecting light emitted by the plurality of light sources when the plurality of light sources are emitting light; a plurality of lenses, for capturing a first image during a period when the plurality of light sources are emitting light and capturing a second image during a period when the plurality of light sources are not emitting light; and a processing unit, comprising:
a control unit, for controlling the plurality of light sources and the light pen to emit light or stop emitting light; anda computation unit, for computing a first location in which the light pen is located on the touch screen and a second location in which the light-reflecting element is located on the touch screen according to the first image and the second image. |
