Systems and methods for reducing unwanted reflections in display systems incorporating an under display biometric sensor
US10664676B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 25, 2018 |
| Grant date | May 26, 2020 |
| Priority date | — |
| Expiry date | May 25, 2038 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20221
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical sensor system includes a display substrate, display pixel circuitry including a plurality of light emitting display elements or pixels disposed over the display substrate, a first circular polarizer disposed over the display substrate and the display pixel circuitry, and a transparent cover sheet disposed over the first circular polarizer. A top surface of the transparent cover sheet provides a sensing surface for an object such as a finger. The optical sensor system also includes a sensor layer disposed below the display substrate, the sensor layer having a plurality of photosensors, and a second circular polarizer disposed between the sensor layer and the display substrate.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.