Multi-segment backlight system and method for keyboards
US7893373B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 25, 2008 |
| Grant date | Feb 22, 2011 |
| Priority date | — |
| Expiry date | May 7, 2029 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F3/0202
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An electroluminescent apparatus includes a protection layer characterized by two or more non-overlapping regions and a back electrode layer which includes two or more back electrode regions. Each of the back electrode regions overlies a corresponding one of the non-overlapping regions in the protection layer. A bottom insulation layer includes two or more bottom insulation regions, each of which overlying a corresponding one of the back electrode regions. The apparatus includes two or more electroluminescent segments, each of which overlying a corresponding one of the back electrode layers. A transparent electrode layer includes two or more transparent electrode regions, each overlying a corresponding one of electroluminescent segments. The apparatus includes two or more power supply devices, each of which coupled to a corresponding one of the back electrode regions and to a corresponding one of the transparent electrode regions for providing luminescence over a corresponding one of the non-overlapping regions.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.