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US 11,770,632 B2Granted
Determining a temperature of a pixel array by measuring voltage of a pixel
AssigneeAllegro MicroSystems, LLC
InventorsJoseph James Judkins, III, Bryan Cadugan
Life of this patent
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Abstract
Methods and apparatus for determining the temperature of a pixel array. In embodiments, a first pixel in a pixel array is reverse-biased and a second pixel in the pixel array is forward-biased. A voltage for the second pixel can be measured to determine a temperature of the pixel array from the measured voltage for the second pixel.
Claims16
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.
3 more elements
A system, comprising:
- a first pixel in a pixel array, wherein the first pixel is reverse-biased;
- a second pixel in the pixel array, wherein the second pixel is forward-biased, wherein the first and second pixels are photosensitive, wherein the first and second pixels have common cathode;
- a first circuit to measure a voltage for the second pixel;
- and
- a second circuit to determine 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.
3 more elements
Dependencies are inferred from the claim text.