Touch screen system
US9046973B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Jun 1, 2012 |
| Grant date | Jun 2, 2015 |
| Priority date | — |
| Expiry date | Jun 1, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04112
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch screen system has an electrically non-conductive substrate. At least one electrically conductive pad is disposed upon the substrate, and an electrically non-conductive cover is placed over the pad. The system further includes a controller having a touch switch interface and at least one output, the touch switch interface being electrically coupled to the pad. The controller generates an AC signal, the AC signal being electrically coupled from the controller to the pad through the touch switch interface, thereby generating an electrostatic field proximate the pad. The controller is also configured to detect at the touch switch interface a change in the electrostatic field resulting from an actuating member contacting the cover proximate the pad. The controller provides at the output a signal relating to the change in the electrostatic field.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.