Patent ID: 7372440

Claim:
An active matrix display device comprising: a plurality of pixels arranged in the form of a matrix on a substrate, each of the pixels including a display element and a pixel circuit which supplies the display element with a drive current; a plurality of first video signal lines and a plurality of second video signal lines arranged along the pixels; and a video signal driver which supplies the pixels with base currents through the first video signal lines and with gradation currents through the second video signal lines, the gradation currents being opposite in the direction of flow to the base currents, the pixel circuit including a first pixel switch connected to a corresponding one of the first video signal lines and a second pixel switch connected to a corresponding one of the second video signal lines, the pixel circuit being configured to store the difference current between the gradation current and the base current when the pixel is selected, and output the stored difference current as the drive current when the pixel is nonselected.