Wavelength conversion structure, apparatus comprising wavelength conversion structure, and related methods of manufacture

Patent metadata

Field	Value
Publication number	US-9488336-B2
Application number	US-201615046518-A
Country	US
Kind code	B2
Filing date	Feb 18, 2016
Priority date	Jul 4, 2013
Publication date	Nov 8, 2016
Grant date	Nov 8, 2016

Abstract

A wavelength conversion structure comprises a sintered body comprising a mixture of a wavelength conversion material and a glass composition, wherein the wavelength conversion material comprises a phosphor and the glass composition comprises ZnO—BaO—SiO 2 —B 2 O 3 .

First claim

What is claimed is:

1. A wavelength conversion structure, comprising:
a sintered body comprising a mixture of a wavelength conversion material and a glass composition,
wherein the wavelength conversion material comprises at least one phosphor and the glass composition comprises ZnO, BaO, SiO 2 and B 2 O 3 as essential components,
wherein the glass composition comprises 30-60 wt % ZnO—BaO, 5-20 wt % SiO 2 , 10-30 wt % B 2 O 3 , and at least one additive composition of Na 2 O, CaO, K 2 O, Li 2 O, and P 2 O 5 .

2. The wavelength conversion structure of claim 1 , wherein the sintered body has a refractive index greater than or equal to 1.5.

3. The wavelength conversion structure of claim 1 , wherein the sintered body has a total transmittance of at least 90% with respect to visible light.

4. The wavelength conversion structure of claim 1 , wherein the at least one additive composition comprises 5-20 wt % P 2 O 5 , and 14-20 wt % Na 2 O+K 2 O.

5. The wavelength conversion structure of claim 1 , wherein the glass composition comprises 5-15 wt % SiO 2 .

6. The wavelength conversion structure of claim 1 , wherein the at least one phosphor comprises at least two phosphors selected from a group consisting a red phosphor, a green phosphor and a yellow phosphor.

7. The wavelength conversion structure of claim 1 , wherein the at least one phosphor comprises a red phosphor and at least phosphor selected from a group consisting a green phosphor and a yellow phosphor, and wherein the red phosphor comprises at least one of MAlSiNx:Eu(1≦x≦5) and M 2 Si 5 N 8 :Eu, and wherein M represents at least one of Ba, Sr, Ca, and Mg.

8. The wavelength conversion structure of claim 1 , wherein the glass composition constitutes approximately 45-70 wt % of the mixture.

9. The wavelength conversion structure of claim 1 , wherein the sintered body forms a plate structure.

10. A light emitting apparatus, comprising:
first and second electrode structures;
a semiconductor LED connected to the first and second electrode structures and emitting a light having a wavelength ranging from 430 nm to 460 nm; and
a wavelength conversion structure according to claim 1 and positioned in a light emission path of the semiconductor LED.

11. The light emitting apparatus of claim 10 , further comprising a transparent resin portion disposed over the semiconductor LED and the wavelength conversion structure along the light emission path of the semiconductor LED,
wherein the wavelength conversion structure has a refractive index greater than a refractive index of the resin and less than a refractive index of the semiconductor LED.

Assignees

• Yoon Chang Bun
• Kim Sang Hyun
• Park Min Jung
• Yoon Chul Soo
• Samsung Electronics Co Ltd

Inventors

• Yoon Chang Bun
• Kim Sang Hyun
• Park Min Jung
• Yoon Chul Soo

Classifications

• C03B19/06 Primary

  by sintering, {e.g. by cold isostatic pressing of powders and subsequent sintering, by hot pressing of powders, by sintering slurries or dispersions not undergoing a liquid phase reaction} · CPC title

• F21V13/08

  the elements being filters or photoluminescent elements and reflectors · CPC title

• F21K9/232

  specially adapted for generating an essentially omnidirectional light distribution, e.g. with a glass bulb · CPC title

• C09K11/025

  non-luminescent particle coatings or suspension media · CPC title

• C09K11/65

  containing carbon (in organic compounds C09K11/06) · CPC title