Touch-screen device including tactile feedback actuator
US9235265B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 17, 2012 |
| Grant date | Jan 12, 2016 |
| Priority date | — |
| Expiry date | Mar 31, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/016
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A tactile feedback actuator includes a first electrode and a second electrode separated by a gap, and a surface layer above the first and second electrodes. The first electrode receives a first stimulus voltage at a first frequency and the second electrode receives a second stimulus voltage at a second frequency, and the first and second electrodes superimpose the first and second stimulus voltages to generate a total voltage that has a beat frequency less than a perception threshold frequency. An object in contact with a portion of the surface layer is caused to vibrate at the beat frequency. The first electrode and the second electrode may constitute an electrode array including a plurality of column electrode segments, and a plurality of row electrode segments. An object in contact with a portion of the surface layer above one or more electrode segments is caused to vibrate at the beat frequency.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.