Discriminative capacitive touch panel
US9105255B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 20, 2013 |
| Grant date | Aug 11, 2015 |
| Priority date | — |
| Expiry date | Jan 6, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09G2300/0426
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A mutual capacitance touch sensor includes a substrate, and an array of electrode elements formed on the substrate. Each electrode element includes at least one of a first electrode group having at least two drive electrodes and at least one sense electrode, or a second electrode group having at least two sense electrodes and at least one drive electrode. The respective electrodes of the first or second group are arranged to form multiple capacitances over different coupling distances. A controller is operatively coupled to the array of electrode elements, the controller configured to assign an input object as a conductive object when measurements of the multiple capacitances decrease as the input object approaches the touch sensor, and assign the input object as non-conductive object when measurements of at least one of the multiple capacitances increase as the input object approaches the touch sensor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.