| 摘要 |
An electronic touch display includes a display device, a plurality of light sensors, an infrared light source, a switch circuit, and a touch position circuit. The light sensors are spaced apart and coupled to the display device. The infrared light source is coupled to the display device and configured to emit infrared light through the display device to illuminate an adjacent user object that is touching the display device. The switch circuit is configured to turn on the infrared light source in response to at least one of the light sensors indicating detection of the user object touching the display device. The touch position circuit is configured to identify a user touch position on the display device in response to signal levels from a plurality of the light sensors sensing infrared light from the infrared light source which is reflected by the user object to the plurality of the light sensors. |
