Patent ID: 9609256
Date: 2017-03-28
CPC Classifications: H04N

Claim:
1. A solid-state image sensor comprising: a plurality of pixels each of which includes a plurality of photoelectric conversion portions and outputs a first signal and a second signal; and an AD converter which converts an analog signal output from each of the plurality of pixels into a digital signal, wherein the AD converter includes a reference signal generator which generates a reference signal whose electric potential varies with a predetermined slope as a time elapses, and a comparator which compares the reference signal and the analog signal output from each of the plurality of pixels, wherein AD conversion of the second signal is controlled in accordance with an AD conversion result of the first signal by the AD converter and a value according to the reference signal at a timing at which the output of the comparator has varied when AD-converting the first signal is set to an initial value of the reference signal input to the comparator when AD-converting the second signal, and wherein the first signal is based on first charges generated by at least one of the photoelectric conversion portions of each pixel, and the second signal is based on the first charges and second charges generated by at least one of the remaining photoelectric conversion portions of the each pixel.