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:
Aug. 27, 2019
Filed:
Jul. 06, 2018
Applicant:
Smartsens Technology (Cayman) Co., Limited., Shanghai, CN;
Inventors:
Chen Xu, Shanghai, CN;
Yaowu Mo, Shanghai, CN;
Zexu Shao, Shanghai, CN;
Zhengmin Zhang, Shanghai, CN;
Weijian Ma, Shanghai, CN;
Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04N 5/355 (2011.01); H04N 5/3745 (2011.01);
U.S. Cl.
CPC ...
H04N 5/35563 (2013.01); H04N 5/3559 (2013.01); H04N 5/37457 (2013.01);
Abstract
A pixel cell has a large and small photodiode, transfer transistors, a reset transistor, a dynamic range enhancement capacitor, a capacitor control transistor, a storage capacitor, a storage capacitor control transistor, an amplifier transistor in a source follower configuration and a rolling shutter row select transistor and a readout circuit block. The small and large photodiodes are exposed simultaneously, the large photodiode having a constant exposure while the small photodiode has a chopped exposure and charge transfer to a storage capacitor.