Pixel circuit for detecting time-dependent visual data
US10721423B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Oct 19, 2017 |
| Grant date | Jul 21, 2020 |
| Priority date | — |
| Expiry date | Oct 19, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/707
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A pixel circuit for detecting time-dependent visual data includes a photo sensing device detecting a light intensity and generating a signal representing the detected light intensity. The pixel circuit further includes: a voltage amplifier configured for amplifying the signal representing the detected light intensity and generating an amplified signal, the amplified signal being generated by taking into account a control signal which shifts an input voltage offset of the voltage amplifier; a hysteresis comparing module configured for comparing the amplified signal to at least one threshold value and to a reference value and for generating at least one output signal based on the comparison; and a feedback control module configured for generating the control signal of the voltage amplifier based on the at least one output signal generated by the hysteresis comparing module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.