Patent ID: 9575381
Date: 2017-02-21
CPC Classifications: G02F,G09G,H01L,H04N

Claim:
1. A semiconductor device comprising: a first photosensor in a first row over a substrate, the first photosensor comprising: a second photosensor in the first row over the substrate; a third photosensor in a second row over the substrate; and a fourth photosensor in the second row over the substrate, wherein the first photosensor, the second photosensor, the third photosensor, and the fourth photosensor are configured to perform a reset operation simultaneously, wherein the first photosensor, the second photosensor, the third photosensor, and the fourth photosensor are configured to perform an accumulation operation simultaneously, wherein the first photosensor and the second photosensor are configured to perform a first selection operation after the accumulation operation of the first photosensor and the second photosensor, wherein the third photosensor and the fourth photosensor are configured to perform a second selection operation after the first selection operation, wherein the oxide semiconductor film comprises a channel region, wherein one electrode of the light-receiving 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 second transistor is electrically connected to a gate of the first transistor, and wherein the first photosensor, the second photosensor, the third photosensor, and the fourth photosensor are configured to perform the accumulation operation, the first selection operation and the second selection operation a plurality of times repeatedly in a period between the reset operation and a next reset operation.