PHOTO SENSOR AND FLAT PANEL DISPLAY USING THE SAME

A photo sensor in a flat panel display includes a first transistor having first, second, and gate electrodes respectively coupled to first, second, and third nodes; a second transistor having first, second, and gate electrodes, respectively coupled to a fourth node, the first node, and a first control signal line; a third transistor having first, second, and gate electrodes, respectively coupled to the second node, the third node, and the first control signal line; a fourth transistor having first, second, and gate electrodes, respectively coupled to a reset power line, the third node, and a reset signal line; a fifth transistor having first, second, and gate electrodes, respectively coupled to a first power source, the first node, and a second control signal line; a sixth transistor having first, second, and gate electrodes, respectively coupled to the second node, output line, and the second control signal line; and a seventh transistor.