Keyboard
US6677931B2 · kind B2 · utility
24Cited by
7References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 7, 2001 |
| Grant date | Jan 13, 2004 |
| Priority date | — |
| Expiry date | Aug 3, 2021 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0202
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A keyboard with a numbers of keys disposed on the base is capable of showing the three-dimensional characters. Each key includes a shell and a three-dimensional character embedded in the shell. Combined with an illuminant module positioned between the base and keys for providing the light source, the three-dimensional characters can be shown clearly and distinguishably by utilizing the color contrast relation with light between the light-colored transparent three-dimensional characters and dark-colored or opaque shells.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.