Patent ID: 9467634
Filing Date: 2016-10-11
CPC Classification: H04N

Claim Text:
1. An image sensor, comprising: a pixel array to output a pixel signal from each column line during a pixel measuring time, and to output a reference signal during a reference measuring time different from the pixel measuring time, the reference signal to be output from at least one pixel during the reference measuring time and the at least one pixel to receive light during the pixel measuring time; a column signal processor to perform correlated double sampling (CDS) on the reference signal to generate a reference CDS signal, and to perform CDS on the pixel signal to generate a pixel CDS signal; and a column mismatch compensator to compensate the pixel CDS signal based on the reference CDS signal, wherein each of at least one pixel row in the pixel array includes a plurality of pixels controlled by a transfer signal, a reset signal, and a selection signal, and wherein each of the pixels including the at least one pixel includes: a photodiode to receive light and generate photocharges; a transfer transistor to transfer the photocharges based on the transfer signal; a floating diffusion node to accumulate the photocharges transferred through the transfer transistor; wherein a reset transistor to discharge the photocharges from the floating diffusion node based on the reset signal; a source follower transistor to amplify and convert the photocharges in the floating diffusion node into a voltage signal; and a selection transistor to selectively output the voltage signal based on the selection signal, and wherein the transfer signal is deactivated while the selection signal is activated during the reference measuring time, wherein the reset signal is at a first logic level while the selection signal is at the first logic level, when the plurality of pixels output the reference signal.