Light-emitting devices
US6801000B2 · kind B2 · utility
4Cited by
3References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 2003 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Jun 18, 2023 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10K59/805
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A light-emitting device comprising: a first electroluminescent element for emitting light of a first colour when energised; and a second electroluminescent element for emitting light of a second colour when energised, the first electroluminescent element having an active lifetime which is greater than that of the second electroluminescent element; characterised in that the second element is configured to operate at a lower brightness than the first element.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.