Methods for reading a pixel and for writing to a pixel and a device having pixel reading capabilities and pixel writing capabilities
US7791664B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | May 24, 2007 |
| Grant date | Sep 7, 2010 |
| Priority date | — |
| Expiry date | Oct 2, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Methods for reading a pixel and writing to a pixel and devices having pixel reading capabilities and pixel writing capabilities. A method for reading a pixel includes: activating a second transistor that is coupled to a second node while maintaining an input transistor inactive; wherein the first transistor is coupled between the second node and a photo-detector; inactivating the second transistor; compensating for second node voltage change resulting from the inactivating of the second transistor by providing a feedback signal via at least one capacitance that capacitively couples the pixel node to the second node; and activating the input transistor and measuring a pixel output signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.