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:
Mar. 21, 2023
Filed:
Jul. 23, 2020
Shanghai Ic R&d Center Co., Ltd., Shanghai, CN;
Chengdu Image Design Technology Co. Ltd., Chengdu, CN;
Xi Zeng, Shanghai, CN;
Pu Zhou, Shanghai, CN;
Huijie Yan, Shanghai, CN;
Ying Luo, Shanghai, CN;
Xuehong He, Shanghai, CN;
Yuan Zhang, Shanghai, CN;
Hailing Yang, Shanghai, CN;
Xiameng Lian, Shanghai, CN;
SHANGHAI IC R&D CENTER CO., LTD, Shanghai, CN;
Abstract
A method of removing fixed pattern noise, comprising: S: performing a single-frame segmented exposure on a pixel array; S: reading a of the pixel array, comprising: S: performing a soft reset, so as to set the reset signal of the pixel unit to an intermediate voltage, and reading a differential reset signal; S: performing a hard reset so as to set the reset signal of the pixel unit to a high voltage; S: turning on a transmission MOS transistor to enable an exposure signal of to photodiode to transmitted to the floating diffusion area, and reading a differential pixel transmission signal; S: subtracting the differential reset signal from the differential pixel transmission signal to obtain an exposure signal with fixed pattern noise removed. Another method is removing fixed pattern noise and an image sensor are further provided.