Patent ID: 7106006
Filing Date: 2006-09-12
Classification: G09G,H01L

Abstract:
1. A semiconductor device comprising: at least one pixel comprising: a first transistor; a second transistor; a third transistor; a fourth transistor; a power line; a signal line; a scanning line; and a means for maintaining a voltage of a gate electrode of said first transistor, wherein gate electrodes of said third and fourth transistors are connected to said scanning line, wherein one of source and drain regions of said third transistor is connected to said signal line and the other is connected to said gate electrode of said first transistor, wherein one of source and drain regions of said fourth transistor is connected to said signal line and the other is connected to a drain region of said first transistor, wherein a source region of said first transistor is connected to said power line, and wherein one of source and drain regions of said second transistor is connected to said drain region of said first transistor.