Patent ID: 8928053
Filing Date: 2015-01-06
Classification: G06F,G09G,H04N

Abstract:
1. A semiconductor device comprising: a pixel portion configured to display an image, the pixel portion comprising: wherein the first photoelectric conversion element is electrically connected to one of a source and a drain of the first transistor, wherein the second photoelectric conversion element is electrically connected to one of a source and a drain of the second transistor, wherein the other of the source and the drain 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 second transistor is electrically connected to the gate of the third 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 the third transistor and the fourth transistor are electrically connected in series, and wherein each of the first transistor and the second transistor comprises an oxide semiconductor layer comprising a channel formation region.