Patent ID: 8085028

Claim:
A method of driving a semiconductor device comprising a first transistor, a second transistor and a third transistor, wherein a gate of the first transistor is electrically connected to one of a source and a drain of the second transistor, one of a source and a drain of the first transistor is electrically connected to a first line, the other of the source and the drain of the first transistor is electrically connected to one of a source and a drain of the third transistor, the other of the source and the drain of the third transistor is electrically connected to a second line, and a gate of the second transistor is electrically connected to the one of the source and the drain of the second transistor, the method comprising steps of: applying a first electric potential to the gate of the first transistor; and passing an electrical current through the second transistor such that an electric potential of the gate of the first transistor is a second electric potential.