Patent ID: 7773058
Filing Date: 2010-08-10
Classification: G11C,H01L

Abstract:
1. A display device comprising: an input terminal; a first power supply; a second power supply; a first switch; a second switch; a third switch; a fourth switch; a capacitor, a first terminal of said capacitor connected with said input terminal through said first switch and connected with said first power supply through said third switch; a first transistor, a source terminal of said first transistor connected with said first power supply, a gate terminal of said first transistor connected with a second terminal of said capacitor; a second transistor, a drain terminal of said second transistor connected with a drain terminal of said first transistor and connected with said gate terminal of said first transistor through said second switch, a source terminal of said second transistor connected with said second power supply; a terminal for applying a bias voltage to a gate terminal of said second transistor; an output terminal connected with said drain terminal of said first transistor through said fourth switch and connected with said gate terminal of said first transistor through said fourth switch and said second switch and connected with said drain terminal of said second transistor through said fourth switch; a pixel supplied with a video signal from said output terminal to display an image; and an electroluminescent element provided in said pixel, wherein said output terminal is connected with said pixel, wherein said third switch is for controlling a connection between the first terminal of said capacitor and said first power supply, and wherein said capacitor is configured to hold a voltage between the gate terminal and the source terminal of the first transistor, wherein the voltage between the gate terminal and the source terminal of the first transistor is applied to the capacitor when the third switch is turned on.