Wide dynamic range image sensor pixel cell
US10397500B1 · kind B1 · utility
66Cited by
3References
10Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jul 6, 2018 |
| Grant date | Aug 27, 2019 |
| Priority date | — |
| Expiry date | Jul 6, 2038 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/78
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel cell has a large and small photodiode, transfer transistors, a reset transistor, a dynamic range enhancement capacitor, a capacitor control transistor, a storage capacitor, a storage capacitor control transistor, an amplifier transistor in a source follower configuration and a rolling shutter row select transistor and a readout circuit block. The small and large photodiodes are exposed simultaneously, the large photodiode having a constant exposure while the small photodiode has a chopped exposure and charge transfer to a storage capacitor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.