Patent ID: 6690034
Filing Date: 2004-02-10
Classification: H01L

Abstract:
A light emitting device comprising:a switching TFT provided over a substrate; an erase TFT provided over the substrate; a current control TFT provided over the substrate; and an EL element provided over the substrate, wherein the switching TFT and the erase TFT and the current control TFT and the EL element are provided in a pixel, wherein drain regions of the switching TFT and the erase TFT are electrically connected with a gate electrode of the current control TFT, wherein a drain region of the current control TFT is electrically connected with the EL element, and wherein gate electrodes of the switching TFT and the erase TFT exist at respective positions where the gate electrodes do not overlap impurity regions of the switching TFT and the erase TFT, respectively, through a gate insulating film.