Patent ID: 8378578
Filing Date: 2013-02-19
Classification: G09G,H01L

Abstract:
1. A semiconductor device comprising: a first transistor having a first gate, a first source, and a first drain; a second transistor having a second gate, a second source, and a second drain; a third transistor having a third gate, a third source, and a third drain; a fourth transistor having a fourth gate, a fourth source, and a fourth drain; a capacitor having a first electrode and a second electrode; and an EL element, wherein one of the first source and the first drain is electrically connected to one of the second source and the second drain, wherein one of the first source and the first drain is electrically connected to one of the fourth source and the fourth drain, wherein the first gate is electrically connected to the second gate, wherein the first gate is electrically connected to one of the first electrode and the second electrode, wherein the first gate is electrically connected to one of the third source and the third drain, wherein the other one of the third source and the third drain is electrically connected to the other one of the fourth source and the fourth drain, wherein the other one of the first source and the first drain is electrically connected to the other one of the first electrode and the second electrode, and wherein the other one of the first source and the first drain is electrically connected to the EL element.