Signal collecting circuit, signal collecting method and electronic device
US11475700B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 27, 2021 |
| Grant date | Oct 18, 2022 |
| Priority date | — |
| Expiry date | Apr 27, 2041 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/701
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
The present disclosure provides a signal collecting circuit, a signal collecting method and an electronic device. A signal collecting circuit includes: a bias voltage wire, multiple fingerprint pixel circuits and a photocurrent collecting module. Each fingerprint pixel circuit includes a photoelectric conversion unit connected to the bias voltage wire and configured to output a photocurrent signal to the bias voltage wire when light hits the photoelectric conversion unit. A photocurrent collecting module is connected to the bias voltage wire and configured to collect the photocurrent signals output by at least part of the photoelectric conversion unit through the bias voltage wire.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.