Patent ID: 8314427
Filing Date: 2012-11-20
Classification: G09G,H01L

Abstract:
1. A display device comprising: a pixel formed over a substrate, the pixel comprising a light emitting element, a first transistor, a second transistor, a third transistor, a fourth transistor and a capacitor; a gate driver circuit formed over the substrate; a terminal formed over the substrate; and a wiring formed over the substrate, the wiring electrically connected to the terminal, wherein the light emitting element comprises a pixel electrode, an organic compound layer over the pixel electrode and an opposite electrode over the organic compound layer, wherein the wiring is in direct contact with the opposite electrode, wherein the first transistor and the second transistor are electrically connected in series between the pixel electrode of the light emitting element and a first line, wherein one of a source and a drain of the third transistor is electrically connected to a gate of the first transistor, wherein one of a source and a drain of the fourth transistor is electrically connected to the other of the source and the drain of the third transistor, wherein the other of the source and the drain of the fourth transistor is electrically connected to a current source circuit via a second line, wherein a gate of the fourth transistor is electrically connected to a third line, wherein a first electrode of the capacitor is electrically connected to the gate of the first transistor, and wherein a second electrode of the capacitor is electrically connected to the first line.