Touch sensitive display devices
US9298320B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 15, 2012 |
| Grant date | Mar 29, 2016 |
| Priority date | — |
| Expiry date | Jun 15, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04104
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A touch sensitive device, the device comprising: a touch sensor light source to project a plane of light above a surface; a camera directed to capture a touch sense image from a region including at least a portion of said plane of light, said touch sense image comprising light scattered from said plane of light by a plurality of said objects simultaneously approaching or touching said surface; a signal processor coupled to said camera, to process a said touch sense image from said camera to identify a lateral location of each of said objects; and an output object position output, to provide output object positions for said plurality of objects; and wherein said signal processor is further configured to: input a succession of said touch sense images; process each said touch sense image to identify a plurality of candidate object touch positions; and filter said candidate object touch positions from said successive touch sense images to link said candidate object touch positions to previously identified output object positions for said plurality of objects; and update said previously identified output object positions using said linked candidate object touch positions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.