Small pixels having dual conversion gain providing high dynamic range
US10510796B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 14, 2018 |
| Grant date | Dec 17, 2019 |
| Priority date | — |
| Expiry date | Jun 14, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/59
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A group of shared pixels comprises: a first shared pixel comprising a first photodiode and a first transfer gate; a second shared pixel comprising a second photodiode and a second transfer gate; a third shared pixel comprising a third photodiode and a third transfer gate; a fourth shared pixel comprising a fourth photodiode and a first transfer gate; a first floating diffusion shared by the first shared pixel and the second shared pixel; a second floating diffusion shared by the third shared pixel and the fourth shared pixel; a capacitor coupled to the first floating diffusion through a first dual conversion gain transistor, and the second floating diffusion through a second dual conversion gain transistor; wherein the capacitor is formed in an area covering most of the first shared pixel, the second shared pixel, the third shared pixel, and the fourth shared pixel.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.