CMOS image sensor for high speed signal processing
US8045029B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 25, 2005 |
| Grant date | Oct 25, 2011 |
| Priority date | — |
| Expiry date | Jun 25, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A CMOS image sensor includes: a plurality of CDS/PGAs (correlating double sampling/programmable gain amplifiers) for processing output signals of pixels corresponding to same colors on different paths; and an offset difference removing part for removing offset difference that occurs when the same color signals are processed on the different paths, wherein the offset difference removing part includes: a dummy pixel array where light is shielded; a unit for reading signals of the dummy pixel array through the CDS/PGAs and storing average offset values for each path; and a signal synthesizing unit for synthesizing the average offset values and signals of an effective pixel array, which are read through the respective CDS/PGAs, and outputting signals of which offset difference is removed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.