The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 27, 2025
Filed:
Jan. 19, 2023
Pixart Imaging Inc., Hsin-Chu, TW;
En-Feng Hsu, Hsin-Chu, TW;
PixArt Imaging Inc., Hsin-Chu, TW;
Abstract
An optical sensor, comprising: a sensor array, comprising a bright region with at least one bright pixel and comprising a dark region with at least one dark pixel, wherein the dark pixel generates a sensing signal that is non-relevant to light emitted to the sensor array; a power noise detection circuit, configured to compute a power noise level of the sensing signal from the dark pixel; and a power noise compensation circuit, configured to control the optical sensor to perform a power noise compensation operation according to the power noise level. A related power noise reduction method is also disclosed. Based on the present invention, the power noise of the optical sensor can be reduced without increasing the power consumption, and the power noise for a low switch frequency can also be improved.