Photodetector adapted to provide additional color information
US11462581B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 31, 2017 |
| Grant date | Oct 4, 2022 |
| Priority date | — |
| Expiry date | Jul 21, 2039 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/803
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An apparatus for forming a color image of a scene and a method for utilizing that apparatus are disclosed. The apparatus includes a plurality of pixel sensors. Each pixel sensor includes a first photodetector includes first main photodiode and a first floating diffusion node. The first main photodiode is characterized by a first light conversion efficiency as a function of wavelength of a light signal incident thereon. The first floating diffusion node includes a parasitic photodiode characterized by a second light conversion efficiency as a function of the wavelength. The second light conversion efficiency is different from the first light conversion efficiency as a function of wavelength. A controller generates an intensity of light in each of a plurality of wavelength bands for the pixel sensor utilizing a measurement of the light signal by each of the first main photodiode and the first parasitic photodiode in that photodetector.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.