Live fingerprint detection utilizing an integrated ultrasound and infrared sensor
US10891461B2 · kind B2 · utility
2Cited by
61References
28Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 22, 2017 |
| Grant date | Jan 12, 2021 |
| Priority date | — |
| Expiry date | Aug 3, 2037 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/45
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Facilitating live fingerprint detection utilizing an integrated ultrasound and infrared (IR) sensor is presented herein. A fingerprint sensor can comprise a first substrate comprising the IR sensor, and a second substrate comprising an ultrasonic transducer. The second substrate is attached to a top portion of the first substrate, and a temperature output of the IR sensor facilitates a determination that a fingerprint output of the ultrasonic transducer corresponds to a finger. The IR sensor can comprise polysilicon comprising a thermopile and an array of photonic crystals thermally coupled to the thermopile.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.