Patent ID: 9729809
Date: 2017-08-08
CPC Classifications: G01S,H01L,H04N

Claim:
1. A driving method of a semiconductor device, the semiconductor device comprising: the driving method comprising a first step, a second step, a third step, and a fourth step, wherein the light source starts to emit light in the first step, wherein the first transistor and the third transistor are on in the first step, wherein the second transistor is off in the first step, wherein first potential corresponding to a total amount of light received by the first photoelectric conversion element and the second photoelectric conversion element is written to the first charge accumulation region in the first step, wherein the light source stops emitting light in the second step, wherein the first transistor is off in the second step, wherein the second transistor and the third transistor are on in the second step, wherein second potential corresponding to a total amount of light received by the first photoelectric conversion element and the second photoelectric conversion element is written to the second charge accumulation region in the second step, wherein the first transistor and the second transistor are off in the third step, wherein first data corresponding to the first potential written to the first charge accumulation region is read in the third step, wherein the first transistor and the second transistor are off in the fourth step, and wherein second data corresponding to the second potential written to the second charge accumulation region is read in the fourth step.