Proportional area weighted sensor for two-dimensional locations on a touch-screen
US8390591B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 22, 2010 |
| Grant date | Mar 5, 2013 |
| Priority date | — |
| Expiry date | Aug 31, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch sensor is provided including a controller and a planar layout having an edge and an interior portion. Further including a connector coupling the touch controller to the layout; a substrate made of a first material; and sensing elements made of a second material formed on the substrate and covering the layout without overlapping. Sensing elements have non-monotonic widths from the center along two perpendicular directions, and a centroid. The touch sensor including pass-through traces to couple edge to interior portions to determine two-dimensional locations for touches using a weighting that is proportional to an overlap area of the sensor elements and their centroids. The substrate may be made of a dielectric and the sensing elements made of a conductor. A method for using a controller circuit having a memory to store centroid locations and determine a two-dimensional location on a touch screen as above is also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.