Patent ID: 8619011

Claim:
A liquid crystal display device comprising: a pixel portion including a pixel, the pixel including a first sub-pixel, a second sub-pixel, and a third sub-pixel; a scanning line; a signal line; a first capacitor wiring; a second capacitor wiring; and a third capacitor wiring, wherein the first sub-pixel includes a first pixel electrode, a first transistor, and a first capacitor element, wherein a gate of the first transistor is electrically connected to the scanning line, one of source and drain of the first transistor is electrically connected to the signal line, and the other of source and drain of the first transistor is electrically connected to the first pixel electrode, wherein a first electrode of the first capacitor element is electrically connected to the first capacitor wiring, and a second electrode of the first capacitor element is electrically connected to the first pixel electrode, wherein the second sub-pixel includes a second pixel electrode, a second transistor, and a second capacitor element, wherein a gate of the second transistor is electrically connected to the scanning line, one of source and drain of the second transistor is electrically connected to the signal line, and the other of source and drain of the second transistor is electrically connected to the second pixel electrode, wherein a first electrode of the second capacitor element is electrically connected to the second capacitor wiring, and a second electrode of the second capacitor element is electrically connected to the second pixel electrode, wherein the third sub-pixel includes a third pixel electrode, a third transistor, and a third capacitor element, wherein a gate of the third transistor is electrically connected to the scanning line, one of source and drain of the third transistor is electrically connected to the signal line, and the other of source and drain of the third transistor is electrically connected to the third pixel electrode, wherein a first electrode of the third capacitor element is electrically connected to the third capacitor wiring, and a second electrode of the third capacitor element is electrically connected to the third pixel electrode, wherein the first capacitor wiring, the second capacitor wiring and the third capacitor wiring are not directly connected to one another in the pixel portion, and wherein the liquid crystal display device is configured to change potentials of the first capacitor wiring and the second capacitor wiring, and to keep almost constant a potential of the third capacitor wiring.