公开(公告)号：US20240397221A1

公开(公告)日：2024-11-28

申请号：US18526343

申请日：2023-12-01

Applicant: Samsung Electronics Co., Ltd.

Inventor： Haneol SEO ,  Kyung-Min KIM ,  Minjong KIM ,  Minwoo LEE

IPC: H04N25/633 ,  H04N25/703 ,  H04N25/77 ,  H04N25/78

Abstract: An image sensor includes a pixel array including active pixels and optical black (OB) pixels; a comparator having a first input terminal at which a pixel signal of the pixel array is applied, and a second input terminal to which a ramp signal is applied; a digital-to-analog converter (DAC) that generates an OB voltage based on dark current data obtained by reading out pixel signals of the OB pixels; and a dark current removal circuit that applies a compensation voltage corresponding to the OB voltage to at least one of the first input terminal and the second input terminal during a readout period of an active pixel.