Capacitive touch screen
US8614688B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Nov 28, 2011 |
| Grant date | Dec 24, 2013 |
| Priority date | — |
| Expiry date | Jan 23, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04111
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention provides a mutual capacitive multi-touch screen, which includes a guarding pattern and a conductive strip pattern exposed from each other. The conductive strip pattern includes a plurality of first conductive strips provided with a driving signal and a plurality of second conductive strips for providing mutual capacitive coupling signals, and the guarding pattern is provided with a DC signal. The guarding pattern allows that, when a touch range of each external conductive object is larger than a predetermined condition, capacitive coupling between each external conductive object and the guarding pattern or capacitive coupling between each external conductive object and the first conductive strips and the guarding pattern is greater than capacitive coupling between each external conductive object and the second conductive strips.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.