Patent ID: 11206369

Abstract:
The image sensing device includes a pixel array including a plurality of unit pixels arranged in columns and rows. Each unit pixel includes a photoelectric conversion element, circulation gates, transfer gates, and drain nodes. The photoelectric conversion element generates photocharges by performing photoelectric conversion of incident light. The circulation gates are located at sides of the photoelectric conversion element, receive circulation control signals and move the photocharges within the photoelectric conversion element in a predetermined direction based on the circulation control signals. The transfer gates are respectively located between two adjacent circulation gates, receive a transfer control signal and transmit the photocharges to a floating diffusion region based on the transfer control signal. The drain nodes are located at sides of the circulation gates that are opposite to the photoelectric conversion element, and receive a drain voltage. The drain nodes include a first drain node that is shared by two adjacent unit pixels arranged in the first direction and a second drain node that is shared by the two adjacent unit pixels arranged in the second direction.