Patent ID: 8785982

Claim:
A unit pixel for a depth sensor, the unit pixel comprising: a light-intensity output circuit configured to output a pixel signal corresponding to a received first electric charge and a received second electric charge according to control signals; a first light-intensity extraction circuit configured to, generate the first electric charge, transmit the first electric charge to the light-intensity output circuit, and discharge the first electric charge via a first node electrically connected to the first light-intensity extraction circuit, the first electric charge varying according to an amount of light reflected from a target object; and a second light-intensity extraction circuit configured to, generate the second electric charge, transmit the second electric charge to the light-intensity output circuit, and discharge the second electric charge via a second node electrically connected to the second light-intensity extraction circuit, the second electric charge varying according to the amount of the reflected light, wherein the second node is electrically disconnected from the first node.