Passive stylus and grip shadow recognition
US10095347B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2016 |
| Grant date | Oct 9, 2018 |
| Priority date | — |
| Expiry date | Sep 5, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0446
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Various embodiments provide an object recognition process that is configured to detect a passive stylus and reject non-passive stylus objects on a touch screen, including an edge portion of the touch screen. In one embodiment, the object recognition process includes receiving sense signals from sense elements of a sense array in response to a touch object being on the sense array, selecting three sense signals from three respective sense elements, calculating a first sum of the strengths of the three selected signals, calculating a second sum of the strengths of two of the selected signals which are greater than the strength of one of the selected signals; and determining a type of the object (e.g., a passive stylus or a user hand's grip shadow) based on the first sum and the second sum.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.