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:
Dec. 21, 2021
Filed:
Jul. 16, 2020
Omnivision Technologies, Inc., Santa Clara, CA (US);
Liang Zuo, San Mateo, CA (US);
Min Qu, Mountain View, CA (US);
Xuelian Liu, Sunnyvale, CA (US);
Rui Wang, San Jose, CA (US);
Zhe Gao, San Jose, CA (US);
Zhiyong Zhan, Fremont, CA (US);
OMNIVISION TECHNOLOGIES, INC., Santa Clara, CA (US);
Abstract
An image sensor includes a pixel array with active rows of pixel cells, a black level calibration row with black image data generation circuits coupled to generate black image data signals representative of an absence of the incident light, and a dummy row with black level clamping circuits coupled to receive a black sun reference voltage to clamp bitlines of the pixel array, and a black level calibration circuit coupled to receive the black sun reference voltage to generate a black sun calibration voltage. A black sun feedback circuit is coupled to generate the black sun reference voltage in response to the black sun calibration voltage and a black level sample reference, and a black level sampling circuit is coupled to the bitlines to sample the black image data signals to generate the black level sample reference received by the black sun feedback circuit.