Method for accessing a pixel and a device having pixel access capabilities
US7969476B1 · kind B1 · utility
5Cited by
2References
8Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 24, 2007 |
| Grant date | Jun 28, 2011 |
| Priority date | — |
| Expiry date | Sep 23, 2028 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for accessing a pixel, the method includes: providing a fixed reference current to a readout circuit that is coupled to a pixel, wherein the fixed reference current is indifferent to changes in a pixel output current drained by the pixel; wherein a value of the pixel output current is responsive to light impinging on the pixel during an integration period; and sampling a difference signal that is responsive to a different between the fixed reference current and the pixel output current while providing the fixed reference current to the readout circuit.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.