Glass composition for high-reliability ceramic phosphor plate and ceramic phosphor

Patent metadata

Field	Value
Publication number	US-9403713-B2
Application number	US-201514618034-A
Country	US
Kind code	B2
Filing date	Feb 10, 2015
Priority date	Feb 10, 2014
Publication date	Aug 2, 2016
Grant date	Aug 2, 2016

Abstract

Provided is a glass composition for a ceramic phosphor plate, including: 75 to 85 mol % of an oxide mixture composed of SiO 2 , B 2 O 3 and ZnO; 10 to 15 mol % of at least one carbonate compound including an alkali metal; and 1 to 5 mol % of Al 2 O 3 , wherein a content of B 2 O 3 is less than 25 mol %.

First claim

What is claimed is:

1. A glass composition for a phosphor plate, comprising:
75 to 85 mol % of an oxide mixture composed of SiO 2, B 2 O 3 and ZnO;
10 to 15 mol % of at least one carbonate compound including an alkali metal; and
1 to 5 mol % of Al 2 O 3 ,
wherein a content of B 2 O 3 is less than 25 mol %, and
wherein the carbonate compound including the alkali metal is at least one compound selected from the group consisting of K 2 CO 3 , Na 2 CO 3 , and a mixture thereof.

2. The glass composition of claim 1 , wherein a ratio of the ZnO to B 2 O 3 ranges from 0.35 to 0.75.

3. The glass composition of claim 1 , further comprising 5 mol % or less of an additional component.

4. The glass composition of claim 3 , wherein the additional component is P 2 O 5 .

5. The glass composition of claim 1 , wherein a content of the B 2 O 3 is less than 15 mol %.

6. A phosphor plate, comprising:
a matrix composed of a glass frit having an average particle diameter of 1 to 10 μm obtained by vitrification of a glass composition of claim 1 ; and
at least one phosphor.

7. The phosphor plate of claim 6 , wherein the phosphor is at least one phosphor selected from the group consisting of an yttrium aluminum garnet (YAG)-based phosphor, a lutetium aluminum garnet (LuAG)-based phosphor, a nitride-based phosphor, a sulfide-based phosphor, a silicate-based phosphor, and a mixture thereof.

8. The phosphor plate of claim 6 , wherein the phosphor is contained in an amount of 1 to 15 mol % in a mixture containing the glass fit and the phosphor.

9. A lighting device, comprising:
the phosphor plate of claim 6 .

10. The lighting device of claim 9 , further comprising:
a light source emitting light, wherein the phosphor plate is provided to be separated from the light source.

11. The lighting device of claim 10 , wherein the light source is at least one element selected from the group consisting of an LED (Light Emitting Diode), an OLED (Organic Light Emitting Diode), an LD (Laser Diode), a laser, and a VCSEL (Vertical Cavity Surface Emitting Laser).

12. The lighting device of claim 10 , wherein a separation distance between the phosphor plate and the light source ranges from 10 to 20 mm.

13. The lighting device of claim 10 , further comprising a housing in which the light source and the phosphor plate are accommodated.

14. The lighting device of claim 13 , wherein the housing has a structure in which a width of the housing is gradually increased upwards from a bottom portion at which the light source is provided.

15. The lighting device of claim 14 , further comprising a filling material filled in the inside of the housing and having a higher refractive index than that of the phosphor plate.

Assignees

• Lg Innotek Co Ltd
• Dae Joo Electronic Mat Co Ltd
• Dae Joo Electronic Mat Co Ltd

Inventors

• Park Jin Gyeong
• Kim Sung Hoon
• Won Ju Yeon
• Lee In Jae
• Park Joon-Geol
• Lee Ji-Hun
• Cho In-Hee
• Lee Hye-Sung

Classifications

• H05B33/14

  characterised by the chemical or physical composition or the arrangement of the electroluminescent material {, or by the simultaneous addition of the electroluminescent material in or onto the light source} · CPC title

• C03C14/006

  the non-glass component being in the form of microcrystallites, e.g. of optically or electrically active material · CPC title

• C09K11/02

  Use of particular materials as binders, particle coatings or suspension media therefor · CPC title

• C03C3/066 Primary

  containing zinc · CPC title

• C03C2214/16

  Microcrystallites, e.g. of optically or electrically active material · CPC title