Pixel array with structure for noise reduction and image sensor including the same

Abstract

A pixel array includes: a plurality of unit pixel groups; and one or more columns including four column lines, wherein each unit pixel group of the plurality of unit pixel groups includes a first pixel group and a second pixel group, wherein the each unit pixel group includes a signal line including a drive transistor and a select transistor, wherein two unit pixel groups share a floating diffusion region, and wherein signal lines of the two unit pixel groups are connected to one column line, wherein each of the two unit pixel groups is configured to transfer a pixel signal to the one column line through the signal lines, wherein the floating diffusion region is located between a reset transistor and a dual conversion transistor, and wherein the dual conversion transistor is connected to the reset transistor and the drive transistor.