Display integrated optical fingerprint sensor with angle limiting reflector
US9934418B2 · kind B2 · utility
15Cited by
21References
25Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2016 |
| Grant date | Apr 3, 2018 |
| Priority date | — |
| Expiry date | Mar 31, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04109
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical sensor for imaging an input object, such as a fingerprint, on a sensing region of a display is disclosed. The sensor includes a transparent substrate having a first side and a second side opposite the first side. An array of detector elements is positioned above the first side of the transparent substrate and an angle limiting reflector is positioned below the second side of the transparent substrate. The angle limiting reflector is configured to reflect light incident on the angle limiting reflector within a limited acceptance angle towards the array detector elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.