Method and apparatuses of transparent fingerprint imager integrated with touch display device
US8994690B2 · kind B2 · utility
Inventors
Key dates
| Filing date | Feb 4, 2013 |
| Grant date | Mar 31, 2015 |
| Priority date | — |
| Expiry date | Jul 8, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06V40/1318
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention describes a transparent fingerprint imaging apparatus wherein said apparatus comprises, a plurality of column lines, a plurality of scan lines, a plurality of data lines, and a plurality of fingerprint capacitance sensing cells wherein a fingerprint capacitance sensing cell further comprises, a fingerprint capacitor comprising a transparent capacitance detecting electrode and a transparent capacitance-detecting dielectric layer, a transparent reference capacitor coupled with said fingerprint capacitor with one electrode connecting to the fingerprint capacitor, and an amplification transparent TFT (thin-film transistor) wherein the gate electrode of the amplification transparent TFT connects to the transparent capacitance detecting electrode, one terminal of said amplification transparent TFT connects to a data line and the other terminal connects to a scan line.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.