US 12,225,315 B2
Dynamic pixel-wise multi-gain readout for high dynamic range imaging
Jiaju Ma, Monrovia, CA (US)
Assigned to Gigajot Technology, Inc., Glendale, CA (US)
Filed by Gigajot Technology, Inc., Pasadena, CA (US)
Filed on Oct. 11, 2022, as Appl. No. 18/045,639.
Claims priority of provisional application 63/254,219, filed on Oct. 11, 2021.
Prior Publication US 2023/0112586 A1, Apr. 13, 2023
Int. Cl. H04N 25/78 (2023.01); H04N 25/11 (2023.01); H04N 25/51 (2023.01)
CPC H04N 25/78 (2023.01) [H04N 25/11 (2023.01); H04N 25/51 (2023.01)] 20 Claims
OG exemplary drawing
 
1. An image sensor integrated circuit, comprising:
a plurality of photodiodes that implement pixels in a pixel array, configured to capture a frame;
readout logic configured to:
receive a gain selection signal indicating respective conversion gains for reading pixel values of the frame from individual ones of the pixels, including a high conversion gain (HCG) and a low conversion gain (LCG);
read a first pixel value of the frame from a first pixel with the HCG as indicated by the gain selection signal;
read, after the read of the first pixel, a second pixel value of the frame from a second pixel with LCG as indicated by the gain selection signal, wherein the gain selection signal is changed after the read of the first pixel; and
output the pixel values of the frame via an output interface of the image sensor integrated circuit, wherein an individual pixel value is output for one conversion gain.