TFT-based fingerprint sensing system with corrected read-out
US11093090B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 3, 2020 |
| Grant date | Aug 17, 2021 |
| Priority date | — |
| Expiry date | Aug 3, 2040 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/419
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A fingerprint sensing system comprising a plurality of conductive selection lines; a plurality of conductive read-out lines crossing the selection lines; selection circuitry controllable to provide a selection signal on at least one selected selection line in the plurality of selection lines; a plurality of pixel elements formed at intersections between the selection lines and the read-out lines; a reference signal source configured to provide a reference signal; and read-out circuitry coupled to each read-out line in the plurality of read-out lines and to the reference signal source, the read-out circuitry being configured to acquire a read-out signal via a read-out line connected to a selected pixel element, when the selected pixel element provides the sensing signal; acquire a reference signal from the reference signal source; form a corrected read-out signal for the selected pixel element based on the read-out signal and the reference signal; and provide corrected read-out signals.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.