Finger touch sensing with a digitizer system
US9619090B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 29, 2014 |
| Grant date | Apr 11, 2017 |
| Priority date | — |
| Expiry date | Jan 2, 2035 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04104
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for multi-touch detection on a grid based capacitive sensor includes transmitting consecutively a first and then a second sequence of a Golay pair of sequences on a first driver line of a grid based capacitive sensor and transmitting the first and then the second sequence of a Golay pair of sequences on a second driver line, at a predefined delay with respect to transmission on the first driver line. Output on a receiver line of the grid based capacitive sensor is sampled and output originating from the first driver line is separated from output originating from the second driver line. The presence of an input object is detected responsive to the output as separated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.