Patent ID: 6661180
Filing Date: 2003-12-09
Classification: G09G,H01L

Abstract:
A light-emitting device comprising:a first transistor; a second transistor, a third transistor; a fourth transistor; an OLED; a power line; a signal line; and a scanning line, wherein gate electrodes of said third and fourth transistors are both 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 to a 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 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 the drain region of said first transistor and the other to a pixel electrode of said OLED.