Fingerprint sensing device
US10990795B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Feb 15, 2020 |
| Grant date | Apr 27, 2021 |
| Priority date | — |
| Expiry date | Feb 15, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1318
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The disclosure provides a fingerprint sensing device, including a glass cover plate, a display panel, a fingerprint sensing module, a liquid crystal layer module, and a control circuit. The display panel is disposed below the glass cover plate, and provides illumination light to a finger. The fingerprint sensing module is disposed below the glass cover plate, and senses light reflected by the finger. The liquid crystal layer module is disposed on the fingerprint sensing module. The control circuit is coupled to the liquid crystal layer module, and drives the liquid crystal layer module to focus the illumination light to the finger or focus the light reflected by the finger to the fingerprint sensing module.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.