Keyboard appliance for touchscreen
US8988355B2 · kind B2 · utility
10Cited by
9References
38Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 13, 2012 |
| Grant date | Mar 24, 2015 |
| Priority date | — |
| Expiry date | Sep 23, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2203/04809
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A keyboard activates areas of a touchscreen according to user interaction with the keyboard. A discharge circuit provides a discharge path for altering the electrostatic field of the touchscreen. Such discharge circuit excludes the user's finger (or stylus). Instead of grounding to the user, a ground plane in varying embodiments may be contained within the keyboard, or be formed at least in part by by the case of the keyboard, the case of the host device, or the ground plane of the host device. The keyboard includes an electrical ground member to absorb the capacitive discharge and/or conduct such discharge to the ground plane.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.