Illuminated pushbutton keyboard
US5408060A · kind A · utility
328Cited by
7References
17Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Jun 29, 1994 |
| Grant date | Apr 18, 1995 |
| Priority date | — |
| Expiry date | Jun 29, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S200/47
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An illuminated keyboard in which the keys are operable in at least two different modes. Each key is provided with symbols or areas of color which denote the different modes. The symbols or areas are selectively illuminated depending upon which mode is selected. Thus, in one mode, one area of the keys will be illuminated, while in another mode, another area of the keys will be illuminated. Thus, only the symbols or areas of color on denoting a selected mode are differentially visibly distinguishable by the user, assisting the user to press the correct key, in any selected mode.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.