Patent ID: 9543039
Date: 2017-01-10
CPC Classifications: G06F,G09G,G11C,H01L

Claim:
1. A display device comprising: a pixel portion provided on a substrate; a driver circuit provided on the substrate, wherein the driver circuit comprises a first transistor, a second transistor, a third transistor, a fourth transistor, and a fifth transistor, wherein one of a source and a drain of the first transistor is electrically connected to one of a source and a drain of the second transistor, wherein one of a source and a drain of the third transistor is electrically connected to one of a source and a drain of the fourth transistor, wherein a gate of the first transistor is electrically connected to a gate of the third transistor, wherein the other of the source and the drain of the first transistor is electrically connected to the other of the source and the drain of the third transistor, wherein one of a source and a drain of the fifth transistor is electrically connected to a gate of the second transistor through no transistor, wherein the other of the source and the drain of the fifth transistor is electrically connected to a gate of the fourth transistor through no transistor, wherein the gate of the first transistor is arranged so that at least a first signal is input, wherein the gate of the second transistor is arranged so that at least a second signal is input, wherein the other of the source and the drain of the fourth transistor is arranged so that at least a first potential and a second potential are switched and supplied, and wherein the one of a source and a drain of the third transistor is arranged to output at least a third signal to the pixel portion.