Fingerprint sensors having in-pixel optical sensors
US10732771B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 24, 2014 |
| Grant date | Aug 4, 2020 |
| Priority date | — |
| Expiry date | May 15, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/15
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In one aspect, a fingerprint sensor device for fingerprint detection includes a light source configured to emit light at a wavelength. The fingerprint sensor device includes an array of sensor pixels to acquire an optical image indicative of a fingerprint. Each sensor pixel includes a photodetector to detect the emitted light reflected off of a target finger and output an optical signal based on the detected reflected light. Each sensor pixel includes a collimator disposed over the photodetector to direct the reflected light in a substantially vertical direction from above the photodetector toward the photodetector. Each sensor pixel includes sensor signal detection circuitry communicatively coupled to the photodetector to acquire the outputted optical signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.