Touch module having a dynamic capacitance matching mechanism
US9063622B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Sep 14, 2012 |
| Grant date | Jun 23, 2015 |
| Priority date | — |
| Expiry date | Jun 15, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/044
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch module having a dynamic capacitance matching mechanism, including: a comparator, having a first input end and a second input end, the second input end being coupled with a reference voltage; a touch capacitive circuit, having a variable touch capacitor, a voltage source, and a second output end, wherein the voltage source is used to perform a charging procedure on the variable touch capacitor, and the variable touch capacitor is coupled to the first input end of the comparator via the second output end after the charging procedure; and a transferred-charge-storing capacitive circuit, having a variable transferred-charge-storing capacitor and a third output end, wherein the variable transferred-charge-storing capacitor is used to couple with the first input end of the comparator via the third output end to perform a charge transfer procedure.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.