Image sensor and driving method thereof
US11025844B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 5, 2019 |
| Grant date | Jun 1, 2021 |
| Priority date | — |
| Expiry date | Nov 5, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/771
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method of driving an image sensor includes integrating an overflowed charge from a photodiode in the floating diffusion area and a dynamic range capacitor. The dynamic range capacitor is formed between the floating diffusion area and a power supply voltage. The method further includes sampling a first voltage formed in the floating diffusion area by the integrated overflowed charge, resetting the photodiode, the floating diffusion area, and the dynamic range capacitor, sampling a reset level of the reset floating diffusion area, transferring a charge accumulated in the photodiode to the floating diffusion area, and sampling a second voltage formed in the floating diffusion area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.