Patent ID: 7692611

Claim:
An electro-optical device comprising: a plurality of scan lines, a plurality of signal lines, pixels arranged at positions corresponding to respective intersections of the scan lines and the signal lines, a power-supply voltage is supplied to the pixels, active elements included in the pixels, which are driven in accordance with a signal level of an analog signal supplied to the signal lines, electro-optical elements, which emit light in accordance with a current level of drive current controlled by the active elements, a plurality of power-supply lines, each power supply line of the plurality of power-supply lines being in parallel with a corresponding scan line and connected to individual pixels in one corresponding row, a brightness detection circuit for converting current corresponding to the power-supply voltage into a digital value every time one of the scan lines is selected, a control circuit that receives the digital value and outputs a light-emission-period adjusting signal in accordance with the digital value, a light-emission-period control circuit that receives the light-emission-period adjusting signal and outputs a control signal in accordance with the light-emission-period adjusting signal that is based on the digital value, a plurality of control signal supply lines that supply the control signal to corresponding pixels and the pixels comprising switching elements that are controlled by the control signal, and a length of a light emitting period of the electro-optical elements being controlled in accordance with the control signal.