Patent ID: 8106902

Claim:
An image display device comprising: a display section having a pixel area configured of a plurality of display pixels each of which has its light emission quantity changed in accordance with a current quantity; a first signal line which is connected to the display section; a second signal line which is connected to a sensor unit which detects an external state; an output circuit which outputs a display signal voltage; a detection circuit; a first switch circuit; a second switch circuit which connects, in a display period of the display signal voltage to be output by the output circuit, the first signal line to the output circuit in order to input the display signal voltage into the pixel area, and connects, in a blanking period of the display signal voltage not to be output by the output circuit, the first signal line to the first switch circuit in order to input a pixel state into the first switch circuit; a pixel state outputting power source connected to the second switch circuit; a pixel control circuit for controlling the light emission quantity which corresponds to the display signal voltage; a displaying power source connected to said pixel control circuit; wherein the first switch circuit connects the detection circuit, in the blanking period, to the first signal line in order to cause the detection circuit to detect the pixel state, and connects, in the display period, the detection circuit to the second signal line in order to cause the detection circuit to detect the external state.