Light emitting device
US7723740B2 · kind B2 · utility
18Cited by
12References
13Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 16, 2004 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | Oct 11, 2024 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8513
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A light emitting device that light of various colors by blending lights emitted by two or more kinds of fluorescent materials which are substantially directly excited by light emitted by an excitation source having principal emission peak in a range from 250 nm to 500 nm. Each of the fluorescent materials is of a direct-transition type.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.