Key input apparatus using magnetic force, operating method thereof, and computer-readable recording medium storing computer programs for performing the method
US7667623B2 · kind B2 · utility
16Cited by
7References
18Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Nov 23, 2005 |
| Grant date | Feb 23, 2010 |
| Priority date | — |
| Expiry date | Jul 10, 2027 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH01H2239/024
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A method of operating a key input apparatus having one or more pressable keys, and a key input apparatus to perform the method, the method including selectively controlling an electromagnetic force to support at least one of the one or more pressable keys, wherein a height of the at least one pressable key is controlled by selectively supplying electric current to an electromagnet to control the electromagnetic force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.