Patent ID: 6700330
Filing Date: 2004-03-02
Classification: G09G,H01L

Abstract:
An electronic device including an electroluminescence display device, said electroluminescence display device comprising:a first electro luminescence element formed over a substrate; a first power supply line; a first thin film transistor electrically connected between the first power supply line and the first electro luminescence element wherein a current is supplied from the first power supply line to the first electro luminescence element through the first thin film transistor a second electro luminescence element formed over said substrate; a second power supply line; and a second thin film transistor electrically connected between the second power supply line and the second electro luminescence element wherein a current is supplied from the second power supply line to the second electro luminescence element through the second thin film transistor; wherein the first thin film transistor comprises a first channel and a first lightly doped region, and the firstly lightly doped region has a first length in a direction which links a source region and a drain region of the first thin film transistor, wherein the second thin film transistor comprises a second channel and a second lightly doped region, and the second lightly doped region has a second length in a direction which links a source region and a drain region of the second thin film transistor, wherein the first length is larger than the second length, and wherein a first voltage applied to the first electro luminescence element is higher than a second voltage applied to the second electro luminescence element.