Light detection circuit and detection method thereof, and light detection device
US10620043B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 23, 2018 |
| Grant date | Apr 14, 2020 |
| Priority date | — |
| Expiry date | Oct 17, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J2001/4473
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A light detection circuit and a detection method thereof, and a light detection device are provided. The light detection circuit including a pixel circuit, a control unit, a counter, and a processor. The pixel circuit includes a phototransistor, a switching transistor, and an output sub-circuit. A first terminal of the output sub-circuit, a first electrode of the phototransistor, and a first electrode of the switching transistor are coupled to a first node, a gate of the phototransistor is coupled to a gradual change signal input line, a gate of the switching transistor is coupled to a scan line, and a second electrode of the switching transistor is coupled to the counter. The control unit is configured to control the counter to start counting under the control of a scan signal and a synchronization signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.