Current driven pixel circuit and related image sensor
US10917600B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Aug 27, 2019 |
| Grant date | Feb 9, 2021 |
| Priority date | — |
| Expiry date | Aug 27, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A current-driven pixel circuit and a related image sensor are disclosed. The image sensor includes a pixel circuit array and a current reference circuit. The pixel circuit array includes a plurality of pixel circuits, each having a photo detecting element and a power element. The photo detecting element changes impendence in response to illumination. The power element is arranged to selectively provide a driving current to the photo detecting element. The current reference circuit includes a current source, wherein the power element provides the driving current according to a reference current of the current source, respectively.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.