Patent ID: 7250592

Claim:
An image sensor comprising a pixel array with M×N unit pixels in rows and columns, M and N being a positive integer, wherein data output terminals of unit pixels arranged on first and second column lines, which are adjacent to each other, are coupled to one common column bus, wherein each unit pixels includes: a light sensing element for receiving light from an object to generate photoelectric charges; a transfer means for selectively transferring the photoelectric charges from the light sensing element to a sensing node; a reset means for resetting the sensing node; a drive means having one end coupled to the common power supply line, for transferring and amplifying an electrical signal applied on the sensing node to transfer the selection means; and a select means for selectively outputting reset data or image data to the common column bus in response to a control signal, wherein each select means of the unit pixels arranged on the first column line is enabled to output the reset data or the image data to the common column bus and, after a predetermined period, each select means of the unit pixels arranged on the second column line is enabled to output the reset data or the image data to the common column bus, wherein power supply voltage (VDD) terminals of the unit pixels arranged on the first and second column lines are coupled to one common power supply line.