US 12,267,594 B2
Image compensation circuit and method
Jung-Yu Tsai, New Taipei (TW); Chen-Tsung Wu, Kaohsiung (TW); Kuan-Lin Wu, Hsinchu (TW); and Hung-Yu Yang, Hsinchu County (TW)
Assigned to NOVATEK Microelectronics Corp., Hsin-Chu (TW)
Filed by NOVATEK Microelectronics Corp., Hsin-Chu (TW)
Filed on Mar. 17, 2022, as Appl. No. 17/697,898.
Claims priority of application No. 110143327 (TW), filed on Nov. 22, 2021.
Prior Publication US 2023/0164463 A1, May 25, 2023
Int. Cl. H04N 23/71 (2023.01); G06V 40/12 (2022.01); G06V 40/13 (2022.01); H03M 1/18 (2006.01); H04N 23/70 (2023.01); H04N 25/51 (2023.01); H04N 25/71 (2023.01); H04N 25/77 (2023.01); H04N 25/772 (2023.01); H04N 25/78 (2023.01)
CPC H04N 23/71 (2023.01) [G06V 40/12 (2022.01); G06V 40/13 (2022.01); G06V 40/1318 (2022.01); G06V 40/1335 (2022.01); G06V 40/1347 (2022.01); G06V 40/1388 (2022.01); G06V 40/1394 (2022.01); H03M 1/18 (2013.01); H04N 23/70 (2023.01); H04N 25/51 (2023.01); H04N 25/745 (2023.01); H04N 25/77 (2023.01); H04N 25/78 (2023.01); H04N 25/772 (2023.01)] 22 Claims
OG exemplary drawing
 
1. An image compensation circuit for an image sensor, comprising: a gain amplifier, for receiving a plurality of image signals from the image sensor and amplifying the plurality of image signals; a compensation control circuit, for generating a plurality of compensation values for the plurality of image signals; a memory, coupled to the compensation control circuit, for storing the plurality of compensation values; and a digital-to-analog converter (DAC), coupled to the memory and the gain amplifier, for converting the plurality of compensation values into a plurality of compensation voltages, respectively, to compensate the plurality of image signals with the plurality of compensation voltages, wherein the image sensor comprises a lens, the plurality of compensation values respectively correspond to a plurality of sensing pixels in the image sensor, and the plurality of compensation values are determined according to a distance between the plurality of sensing pixels and a center of the lens, respectively.