Collimator for under-display optical fingerprint sensing
US11017200B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Jan 29, 2020 |
| Grant date | May 25, 2021 |
| Priority date | — |
| Expiry date | Jan 29, 2040 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04M2250/12
- WIPO fieldTelecommunications
- WIPO sectorElectrical engineering
Abstract
A collimator for under-display fingerprint sensing includes (a) a substrate having opposite facing first and second sides, (b) an array of microlenses disposed on the first surface for focusing light from a fingerprint surface onto a focal plane that is between the array of microlenses and the second side of the substrate such that the light, as projected by the array of microlenses, is diverging when exiting the second side of the substrate, and (c) an array of apertures between the array of microlenses and the substrate, wherein each of the apertures is aligned to and cooperates with a respective one of the microlenses to form a field-of-view-limited lens having a field of view corresponding to a respective local portion of the fingerprint surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.