Acoustic pulse recognition with increased accuracy by localizing contact area of plate
US9128566B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 28, 2013 |
| Grant date | Sep 8, 2015 |
| Priority date | — |
| Expiry date | Mar 11, 2033 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0202
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A keypad with a plate and distinct keys that move relative to the plate to generate an acoustic signal for acoustic pulse recognition (APR). Each key represents an input value and is structured to contact the plate at a region smaller than an upper surface of the key where a finger or a thumb comes into touch. The contact region of the plate coming into contact with an individual key is small relative the upper surface of the key, and hence, acoustic signals generated in response to the touch of the same key has less variance compared to acoustic signals generated in response to a direct touch of the plate by a finger or a thumb. As a result, the localization of the touch using APR can be more accurate compared to direct touch of the plate by a figure or a thumb.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.