White-light emitting device and preparation method and application of the same
US8314543B2 · kind B2 · utility
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16Claims
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Key dates
| Filing date | Oct 5, 2010 |
| Grant date | Nov 20, 2012 |
| Priority date | — |
| Expiry date | Jan 22, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02B20/00
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A white-light emitting device and its preparation method are provided. The white-light emitting device comprises an ultraviolet (UV) light emitting diode (LED) chip, a first phosphor, and a second phosphor, wherein the UV LED chip generates a first radiation; the first phosphor is composed of Zn(C3N2H4)2 powder and is excited by the first radiation to generate a second radiation; and the second phosphor is excited by the first radiation and/or the second radiation to generate a third radiation. The third radiation is then mixed with the first radiation and/or the second radiation to generate a white light.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.