Fingerprint detector using an EL lamp
US6411726B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Oct 8, 1998 |
| Grant date | Jun 25, 2002 |
| Priority date | — |
| Expiry date | Oct 8, 2018 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1329
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Lamp materials, e.g. a phosphor layer and a dielectric layer, are roll coated onto a release layer. A photodetector is coated with a translucent conductive layer and the lamp materials are laminated to the transparent conductive layer. The release layer is removed and a protective coating is applied to the dielectric layer. A resin coating is optionally applied to the transparent conductive layer prior to lamination to improve adhesion. The protective coating can be incorporated into the lamp materials prior to lamination. The release layer can be coated by screen printing or other deposition technique rather than by roll coating.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.