Patent ID: 6697057
Filing Date: 2004-02-24
Classification: G09G,H01L

Abstract:
A display device comprising:an EL element having a first electrode, a second electrode, and an EL layer that is interposed between the first electrode and the second electrode; a first TFT; a second TFT having the same polarity as the first TFT, the second TFT including a gate electrode and a drain region that are connected to each other; and a power supply line connected to the first electrode of the EL element through the first TFT, wherein the display device further comprises: means for setting a current linearly corresponding to the electric potential difference between the electric potential of the power supply line and the electric potential of a video signal as a drain current of the second TFT; and means for equalizing the gate voltage of the first TFT with the gate voltage of the second TFT.