Capacitive touch system and method of operating a capacitive touch system
US9182849B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 31, 2012 |
| Grant date | Nov 10, 2015 |
| Priority date | — |
| Expiry date | Jul 16, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A capacitive touch system includes a touch panel, a detection circuit, and a microprocessor. The touch panel includes a plurality of scan areas. Each scan area of the plurality of scan areas includes a plurality of sensing units. The detection circuit is coupled to the touch panel for utilizing the Wheatstone bridge principle to transmit driving signals to the plurality of scan areas in turn to generate a detection result corresponding to each scan area of the plurality of scan areas according to a predetermined timing. The microprocessor is used for generating the predetermined timing to the detection circuit, and determining whether each area is touched according to a detection result corresponding to each scan area.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.