Patent ID: 8830278

Claim:
A display device comprising: a first pixel including a first transistor, a second transistor, and a first display element; a second pixel including a third transistor, a fourth transistor, and a second display element; a first shift register electrically connected to a first scan line and a third scan line; and a second shift register electrically connected to a second scan line and a fourth scan line, wherein a gate of the first transistor is electrically connected to the first scan line, and one of a source and a drain of the first transistor is electrically connected to a first signal line, wherein a gate of the second transistor is electrically connected to the second scan line, and one of a source and a drain of the second transistor is electrically connected to a second signal line, wherein one electrode of the first display element is electrically connected to the other of the source and the drain of the first transistor and the other of the source and the drain of the second transistor without passing through an insulator, wherein a gate of the third transistor is electrically connected to the third scan line, and one of a source and a drain of the third transistor is electrically connected to the first signal line, wherein a gate of the fourth transistor is electrically connected to the fourth scan line, and one of a source and a drain of the fourth transistor is electrically connected to the second signal line, wherein one electrode of the second display element is electrically connected to the other of the source and the drain of the third transistor and the other of the source and the drain of the fourth transistor without passing through the insulator, and wherein each of channel formation regions of the first to fourth transistors includes an amorphous semiconductor or a microcrystalline semiconductor.