US 11,770,632 B2
Determining a temperature of a pixel array by measuring voltage of a pixel
Joseph James Judkins, III, Sugar Land, TX (US); and Bryan Cadugan, Bedford, NH (US)
Assigned to Allegro MicroSystems, LLC, Manchester, NH (US)
Filed by Allegro MicroSystems, LLC, Manchester, NH (US)
Filed on Apr. 14, 2021, as Appl. No. 17/230,253.
Prior Publication US 2022/0337770 A1, Oct. 20, 2022
Int. Cl. H04N 25/709 (2023.01); G01K 7/01 (2006.01); H04N 17/00 (2006.01)
CPC H04N 25/709 (2023.01) [G01K 7/01 (2013.01); H04N 17/002 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A method, comprising:
reverse biasing a first pixel in a pixel array;
forward biasing a second pixel in the pixel array, wherein the first and second pixels are photosensitive, wherein the first and second pixels have a common cathode;
measuring a voltage for the second pixel; and
determining a temperature of the pixel array from the measured voltage for the second pixel,
wherein the first and second pixels are coupled to a reverse bias voltage source at the common cathode, and wherein the second pixel, and not the first pixel, is coupled to a forward bias voltage source that has a higher voltage than the reverse bias voltage source to forward bias the second pixel.