Patent ID: 8816285
Filing Date: 2014-08-26
Classification: G06F

Abstract:
1. A display device comprising: an active matrix substrate; a plurality of non-visible light sources; a plurality of photosensors provided in a pixel region of the active matrix substrate for detecting reflected light originating from the non-visible light sources; a sensor driver circuit configured to supply a sensor drive signal to the photosensors; an amplifier circuit configured to amplify a signal read from the photosensors in response to the sensor drive signal and output a photosensor signal; a signal processing circuit configured to process the photosensor signal output from the amplifier circuit; and a light source control circuit configured to control on and off of the non-visible light sources, wherein the plurality of photosensors are divided into a plurality of sensor groups in the pixel region, and the light source control circuit causes separate sets of non-visible light sources, corresponding to the sensor groups, to be on during different time periods.