Optical fingerprint imaging system and array sensor
US10614281B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 2015 |
| Grant date | Apr 7, 2020 |
| Priority date | — |
| Expiry date | Feb 14, 2036 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10F39/8057
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An optical fingerprint imaging system and an array sensor are provided. The optical fingerprint imaging system includes: a cover plate, a backlight source, an array sensor disposed between the cover plate and the backlight source, and an optical assembly; the array sensor includes an array of pixels each of which has an opaque region and a nonopaque region, the opaque region includes an photosensitive device for converting an input light into electronic signals, and the nonopaque region is adapted for allowing light from the backlight source passing through, and the optical assembly is adapted for partially blocking the light from the cover plate to the photosensitive device, and is configured with at least one light tunnel between the cover plate and each of the photosensitive devices, wherein the light tunnel allows light passing through in a preset range of direction. Accordingly, the contrast of a fingerprint image obtained is enhanced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.