US 12,170,297 B2
Pixel circuit, control method and image sensor
Guang Yang, Shanghai (CN); Jinjian Hou, Shanghai (CN); Guanjing Ren, Shanghai (CN); Yaowu Mo, Shanghai (CN); and Xiaoyong Wang, Shanghai (CN)
Assigned to SMARTSENS TECHNOLOGY (HK) CO., LIMITED, Hong Kong (CN)
Filed by SMARTSENS TECHNOLOGY (HK) CO., LIMITED, Hong Kong (CN)
Filed on Dec. 30, 2021, as Appl. No. 17/566,507.
Claims priority of application No. 202111301603.1 (CN), filed on Nov. 4, 2021.
Prior Publication US 2023/0138982 A1, May 4, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H01L 27/146 (2006.01)
CPC H01L 27/14612 (2013.01) [H01L 27/14621 (2013.01); H01L 27/14627 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A pixel circuit, wherein the pixel circuit comprises a plurality of pixel units arranged in an array, each pixel unit comprises:
at least two pixels, each of the pixels comprises a photoelectric conversion element and a transmission transistor, and the photoelectric conversion element is used for generating an electric charge in response to incident light; the transmission transistor is coupled between the photoelectric conversion element and a floating diffusion node, and is configured to transfer the electric charge accumulated by the photoelectric conversion element in an exposure process to the floating diffusion node according to a transmission control signal;
wherein, the transmission transistor of at least one of the pixels of at least one of the pixel units is connected to a corresponding first group of transmission control lines, and the transmission transistors of other pixel units are connected to a corresponding second group of transmission control lines;
wherein when a density of phase focus is 100%, a timing of a transmission control signal received by the first group of transmission control lines is the same as a timing of the transmission control signal received by the second group of transmission control lines; and when the density of phase focus is not 100%, the timing of the transmission control signal received by the first group of transmission control lines is different from the timing of the transmission control signal received by the second group of transmission control lines.