Red luminophor, LED device and method for making the LED device
US11271142B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 21, 2020 |
| Grant date | Mar 8, 2022 |
| Priority date | — |
| Expiry date | Jul 21, 2040 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02P60/14
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A red luminophor, LED device and method for making the LED device. The red luminophor includes one or more materials selected from SrLiAl3N4:Eu2+, CaLiAl3N4:Eu2+, Sr4LiAl11N14:Eu2+ and Li2Ca2(Mg2Si2N6):Eu2+. The LED device includes the red luminophor. The method for making the LED device includes preparing a carrier; installing a blue LED onto the carrier; mixing the red luminophors and the transparent sealant to form a mixture; dispensing the mixture on the blue LED and the carrier to form an integration; and heating and curing the integration. The red luminophor has continuous light radiation in the wavelength range of 600 nm-750 nm, with the emission peak at 650-680 nm and the FWHM of less than 90 nm. Its emission light intensity at the wavelength of 730 nm is not less than 30% of its maximum emission light intensity, which matches the absorption needs of phytochrome of plant.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.