Multiple touch location in a three dimensional touch screen sensor
US7982723B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Sep 18, 2008 |
| Grant date | Jul 19, 2011 |
| Priority date | — |
| Expiry date | Oct 12, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04808
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch screen capable of correctly identifying multiple touches employs multiple active line arrays oriented to provide multi-dimensional data. Three arrays of capacitance based active lines are each distinctly oriented to form a plurality of intersections. A first and second array are generally oriented perpendicularly while a third array is oriented to bisect the resulting matrix such that the active lines of the third array also intersect the existing vertices. As a result of a touch each active line array identifies the location of the touch from three distinct directions. Ambiguity from dual touch scenarios existing in dual array systems is removed by providing an additional reference.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.