Patent ID: 8368676

Claim:
A display device, comprising: a display panel; and an ambient light sensor which detects an intensity of ambient light on a display surface side of the display panel in response to photoelectric conversions made by at least one photoelectric conversion device provided in the display panel, said display device adjusting a luminance of display on the display surface in accordance with the intensity of the ambient light which intensity is detected by the ambient light sensor, a light shield against stray light, provided in the display panel so as to be closer to a back surface side of the display panel than said at least one photoelectric conversion device is, the light shield being made of a conductive material, a predetermined electric potential being applied to the light shield, and wherein the ambient light sensor is configured such that said at least one photoelectric conversion device comprises (i) a first photoelectric conversion device on which the ambient light is incident and (ii) a second photoelectric conversion device, having a same configuration as that of the first photoelectric conversion device, which is in an environment in which light having a reference brightness is incident; and an open circuit voltage generated by the second photoelectric conversion device is applied to the first photoelectric conversion device as a bias voltage, and the ambient light sensor detects the intensity of the ambient light in accordance with a current outputted from the first photoelectric conversion device.