Fluorescent material and light-emitting device
US7488432B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 27, 2004 |
| Grant date | Feb 10, 2009 |
| Priority date | — |
| Expiry date | Nov 20, 2025 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH10H20/8512
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
The present invention provides a fluorescent material comprising a light-storing first phosphor that at least partially converts energy emitted by an excitation source to a first emission spectrum that is different from the energy, and a second phosphor that at least partially converts the first emission spectrum to a second emission spectrum that is different from the first emission spectrum; a lamp equipped with such a fluorescent material; a light-emitting device that produces a whitish afterglow, comprising such a fluorescent material for converting the emission by an LED chip; and a display unit comprising a display equipped with a plurality of such light-emitting devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.