Image sensor and method for operating the same
US8587698B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 14, 2011 |
| Grant date | Nov 19, 2013 |
| Priority date | — |
| Expiry date | Apr 11, 2032 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image sensor is provided. A first storage unit stores an image information value corresponding to an image signal provided from a pixel, and a second storage unit stores a reset information value corresponding to a reset signal provided from the pixel. A differential signal comparison unit receives image information value and the reset information value, compares the two values, and outputs a difference value therebetween. A switch unit is switched so that the two input values are transferred in a crossed manner in a first operation period and a second operation period. A digital value providing unit combines a first digital value, which corresponds to an output timing of a first comparison signal in the first operation period, and a second digital value, which corresponds to an output timing of a second comparison signal in the second operation period, and output a digital value corresponding to image information received at the pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.