Method and apparatus for accurate coordinate calculation of objects in touch applications
US8674958B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 12, 2013 |
| Grant date | Mar 18, 2014 |
| Priority date | — |
| Expiry date | Jun 12, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Systems and methods and techniques are disclosed for determining the position and size of an object touching a touch-sensitive display. One embodiment may comprise a set of reference templates—where each reference template is a model and/or data associated with a reference object of a given size. The reference templates may be determined on a priori basis—possibly created during a training phase for the touch display system. The training phase may be performed by stepping an object across a touch display and noting its actuation signal—while the modeling step may be performed by calculating actuation signals based on a model of objects of a given size. With an actual object, its position and size may be determined, calculated and/or estimated by solving a set of inverse finger response functions—e.g., as a set of over-determined linear equations.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.