Phosphor, light emitting device, surface light source device, display device and illumination device
US-9200200-B2 · Dec 1, 2015 · US
Method of manufacturing phosphor, light-emitting device, and image display apparatus
US9279079B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9279079-B2 |
| Application number | US-15507308-A |
| Country | US |
| Kind code | B2 |
| Filing date | May 29, 2008 |
| Priority date | May 30, 2007 |
| Publication date | Mar 8, 2016 |
| Grant date | Mar 8, 2016 |
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- Title
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Abstract
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A method of manufacturing a first phosphor of which emission spectrum shape well matches with a color filter of three primary colors of light, a light-emitting device including the first phosphor, and an image display apparatus including the light-emitting device are provided. The light-emitting device includes a semiconductor light-emitting element emitting excitation light and the first phosphor absorbing the excitation light and emitting green light. The first phosphor contains a solid solution of aluminum element and a metal element M selected from the group consisting of Mn, Ce and Eu in crystals of an oxynitride having a β-type Si 3 N 4 crystal structure, an amount of oxygen in the crystals being not higher than 0.8 mass %.
First claim
Opening claim text (preview).
What is claimed is: 1. A light-emitting device, comprising: a semiconductor light-emitting element emitting excitation light; and a first phosphor absorbing said excitation light and emitting green light having a peak wavelength in a wavelength range from 520 nm to 550 nm, wherein said first phosphor includes a solid solution of aluminum element and a metal element M selected from the group consisting of Mn, Ce, and Eu in crystals of an oxynitride having a β-type Si 3 N 4 crystal structure, an amount of oxygen in synthesized powders of said crystals being not higher than 0.8 mass %. 2. An image display apparatus, comprising a light-emitting device as a backlight source, wherein said light-emitting device comprises a semiconductor light-emitting element emitting excitation light, and a first phosphor absorbing said excitation light and emitting green light having a peak wavelength in a wavelength range from 520 nm to 550 nm, wherein said first phosphor includes a solid solution of aluminum element and a metal element M selected from the group consisting of Mn, Ce, and Eu in crystals of an oxynitride having a β-type Si 3 N 4 crystal structure, an amount of oxygen in synthesized powders of said crystals being not higher than 0.8 mass %. 3. The light-emitting device according to claim 1 , wherein said first phosphor emits green light having a peak wavelength in a wavelength range from 520 nm to 535 nm as a result of irradiation with said excitation light. 4. The light-emitting device according to claim 1 , wherein said metal element M is Eu and a full width at half maximum of emission spectrum of said first phosphor is 55 nm or smaller.
Assignees
Inventors
Classifications
Encapsulations, e.g. protective coatings · CPC title
Die-attach connectors and bond wires · CPC title
- C09K11/0883Primary
Arsenides; Nitrides; Phosphides · CPC title
- C09K11/77348Primary
Silicon Aluminium Nitrides or Silicon Aluminium Oxynitrides · CPC title
- C09K11/7734Primary
Aluminates · CPC title
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- What does patent US9279079B2 cover?
- A method of manufacturing a first phosphor of which emission spectrum shape well matches with a color filter of three primary colors of light, a light-emitting device including the first phosphor, and an image display apparatus including the light-emitting device are provided. The light-emitting device includes a semiconductor light-emitting element emitting excitation light and the first phosp…
- Who is the assignee on this patent?
- Takahashi Kohsei, Harada Masamichi, Hirosaki Naoto, and 2 more
- What technology area does this patent fall under?
- Primary CPC classification C09K11/0883. Mapped technology areas include Chemistry & Metallurgy.
- When was this patent published?
- Publication date Tue Mar 08 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).