Patent ID: 9743022
Date: 2017-08-22
CPC Classifications: H04N

Claim:
1. An image sensor comprising: a pixel array including at least one unit pixel that generates accumulated charges corresponding to incident light in a photoelectric conversion period and that outputs an analog signal based on the accumulated charges in a readout period; a correlated double sampling unit configured to generate an image signal by performing a correlated double sampling operation on the analog signal; an analog-digital converting unit configured to convert the image signal into a digital signal; a control unit configured to control the pixel array, the correlated double sampling unit, and the analog-digital converting unit; and an overflow power voltage control unit configured to control an overflow power voltage applied to an electrode of an overflow transistor included in the unit pixel to have a low voltage level in the photoelectric conversion period and to control the overflow power voltage to have a high voltage level in the readout period.