Optical sensor
US11478634B2 · kind B2 · utility
0Cited by
3References
17Claims
0Family size
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Key dates
| Filing date | Oct 24, 2018 |
| Grant date | Oct 25, 2022 |
| Priority date | — |
| Expiry date | Oct 24, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2001/446
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An optical sensor, especially an artificial retina, that includes at least one photosensitive cell. Each cell includes a integration capacitor, a read circuit the operation of which depends on the charge of the integration capacitor, at least one MOS transistor operating subthreshold, and the drain-source current of which influences the charge on the integration capacitor, and at least one photodiode operating in photovoltaic mode and connected to the gate of this transistor, such that the drain-source current of the MOS transistor depends on the optical power received by the photodiode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.