Display device

摘要

A photosensor-equipped display device is provided having a combination of visible and non-visible light sources where a voltage drop is minimized when the non-visible light sources are turned on. The display device includes: a plurality of infrared LEDs (3b); photosensors (9) provided in a pixel region (4) for detecting reflected light originating from the infrared LEDs (3b); a sensor row driver circuit (7) configured to supply a sensor drive signal to the photosensors (9); an amplifier circuit (6) configured to amplify a signal read from the photosensors (9) in response to the sensor drive signal and output a photosensor signal; a signal processing circuit (20) configured to process the photosensor signal output from the amplifier circuit (6); and a backlight control circuit (13) configured to control on and off of the infrared LEDs (3b). The plurality of photosensors (9) are divided into a plurality of sensor groups in the pixel region (4). The light source control circuit (13) causes separate sets of infrared LEDs (3b), corresponding to the sensor groups, to be on during different time periods.

主权项

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.