Force-sensing touch screen input device
US9921679B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 26, 2015 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Feb 23, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04102
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A force sensing touch screen input device is a solid assembly of multiple layers including a display with a touch-sensitive external surface, a first and second electrode layers separated by a compressible dielectric structure—forming a capacitive force-sensing array, and a rigid planar substrate. One or both electrode layers may be formed by metallizing a polymer surface of the rigid substrate or by creating a conductive electrode onto an internal surface of the display. To increase reliability, each layer is permanently adhered to or formed onto an adjacent layer over its entire surface, whereby preventing internal shifts therebetween. To increase response time, the cover glass flexibility, compressible dielectric structure and the gasket structure between the cover glass and the rigid planar substrates are selected to provide elastic compression and recovery during normal operating conditions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.