Patent ID: 9082676
Filing Date: 2015-07-14
Classification: G01S,H01L

Abstract:
1. A method for driving a semiconductor device comprising a photosensor comprising a photodiode, comprising the steps of: performing first reset operation by supplying a first signal to a first terminal of the photodiode from a first time to a second time; performing first irradiation of an object with first light from a light source from the second time to a fourth time; performing first imaging by detecting the first light reflected off the object from the second time to the fourth time; repeating the first irradiation and the first imaging n (n is a natural number of 2 or more) times; performing second irradiation of the object with second light from the light source from a twelfth time to a fifteenth time; performing second reset operation by supplying the first signal to the first terminal of the photodiode from a fourteenth time to the fifteenth time; performing second imaging by detecting the second light reflected off the object from the fifteenth time to a sixteenth time; and repeating the second irradiation and the second imaging the n times, wherein a time length from the second time to the fourth time and a time length from the twelfth time to the fifteenth time are the same.