Wavelength conversion member having two different wavelength converting materials and backlight unit including the same

Patent metadata

Field	Value
Publication number	US-10386024-B2
Application number	US-201815870725-A
Country	US
Kind code	B2
Filing date	Jan 12, 2018
Priority date	Jan 23, 2017
Publication date	Aug 20, 2019
Grant date	Aug 20, 2019

Abstract

A wavelength conversion member includes: a first wavelength converter containing a first wavelength converting material; a second wavelength converter containing a second wavelength converting material different from the first wavelength converting material; a first container member providing a space for accommodating the first wavelength converter; and a second container member facing the first container member and providing a space for accommodating the second wavelength converter. The first container member and the second container member may be at least partially fusion-bonded with each other.

First claim

What is claimed is:

1. A wavelength conversion member, comprising:
a first wavelength converter extending in a first direction and comprising a first wavelength converting material;
a second wavelength converter extending in the first direction and comprising a second wavelength converting material different from the first wavelength converting material;
a first container member extending in the first direction and providing a space for accommodating the first wavelength converter; and
a second container member extending in the first direction and providing a space for accommodating the second wavelength converter,
wherein each of the first container member and the second container member has a first side and a second side,
wherein the second container member is adjacent to the first container member in a second direction, crossing the first direction, the first side of the first container member and the second side of the second container member facing each other and together forming a contact surface between the first container member and the second container member, and
wherein the contact surface between the first container member and the second container member has at least a portion which is substantially no physical boundary between the first container member and the second container member.

2. The wavelength conversion member of claim 1 ,
wherein the contact surface between the first container member and the second container member comprises:
a first portion where there is a physical boundary between the first container member and the second container member;
a second portion where there is substantially no physical boundary between the first container member and the second container member; and
a third portion overlapping the first wavelength converter, and
wherein the first portion, the second portion, and the third portion are aligned along a third direction, crossing the first and second directions, and
a part of the first portion is located between the second portion and the third portion.

3. The wavelength conversion member of claim 2 ,
wherein the part of the first portion located between the second portion and the third portion has a width of 50 μm or more,
the second portion has a width of 60 μm to 120 μm,
a seed-like structure exists in the vicinity of the second portion, and
the seed-like structure has an elongated shape having a major axis and a minor axis.

4. The wavelength conversion member of claim 2 ,
wherein the first wavelength converter further comprises metal particles selected from aluminum oxide particles and silicon oxide particles, and
the second wavelength converter does not comprise metal particles.

5. The wavelength conversion member of claim 2 ,
wherein the first wavelength converter is surrounded by the first container member, and
the second wavelength converter is surrounded by the second container member.

6. The wavelength conversion member of claim 2 ,
wherein the first side of the first container member has a first concave groove for accommodating the first wavelength converter, and
the second side of the second container member, facing the first container member, has a second concave groove for accommodating the second wavelength converter.

7. The wavelength conversion member of claim 6 ,
wherein a gap is formed between the first wavelength converter and the second wavelength converter by the first and second concave grooves.

8. The wavelength conversion member of claim 2 , further comprising:
a first cover member adjacent to the second side of the first container member, opposite the first side of the first container member, and sealing the first wavelength converter; and
a second cover member adjacent to the first side of the second container member, opposite the second side of the second container member, and sealing the second wavelength converter,
wherein the second side of the first container member has a first concave groove for accommodating the first wavelength converter, and
the first side of the second container member has a second concave groove for accommodating the second wavelength converter.

9. The wavelength conversion member of claim 2 , further comprising:
a cover member adjacent to the second side of the first container member, opposite the first side of the first container member, and sealing the first wavelength converter,
wherein the second side of the first container member has a first concave groove for accommodating the first wavelength converter, and
the second side of the second container member, facing the first side of the first container member, has a second concave groove for accommodating the second wavelength converter, and
the second wavelength converter is surrounded by the first side of the first container member and the first side of the second container member, opposite the second side of the second container member.

10. A wavelength conversion member, comprising:
a first glass extending in a first direction and having a first side and a second side, opposite the first side;
a second glass extending in a first direction and having a first side and a second side, opposite the first side, the second glass being adjacent to the first glass in a second direction, crossing the first direction, and at least partially in direct contact with the first glass, the first side of the first glass and the second side of the second glass facing each other and together forming a contact surface between the first glass and the second glass;
a first wavelength converter interposed in the second glass adjacent to the contact surface between the first glass and the second glass, the first wavelength converter comprising a first wavelength converting material; and
a second wavelength converter interposed in the second glass adjacent to the first side of the second glass, the second wavelength converter comprising a second wavelength converting material different from the first wavelength converting material,
wherein the contact surface between the first glass and the second glass has at least a portion which is substantially no physical boundary between the first glass and the second glass.

11. The wavelength conversion member of claim 10 ,
wherein the first glass and the second glass are at least partially fusion-bonded with each other, and
wherein the contact surface between the first glass and the second glass comprises:
a first portion where there is a physical boundary between the first glass and the second glass;
a second portion where there is substantially no physical boundary between the first glass and the second glass; and
a third portion overlapping the first wavelength converter, and
wherein a part of the first portion is located between the second portion and the third portion.

12. The wavelength conversion member of claim 11 ,
wherein the first side of the first glass is substantially flat,
the second side of the second glass, facing the first glass, has a first concave groove,
the first side of the second glass has a second concave groove,
the first wavelength converter is inserted in the first concave groove, and
the second wavelength converter is inserted in the second concave groove.

13. The wavelength conversion member of claim 12 ,
wherein a gap is formed between the first glass and the first wavelength converter by the first concave groove.

14. The wavelength conversion member of claim 11 , further comprising:
a third glass adjacent to the second wavelength converter in the second direction and at least partially in direct contact with the second glass,
wherein the first side

Assignees

• Samsung Display Co Ltd

Inventors

• Song Si Joon
• Kwon Yong Hoon
• Kim Won Jin
• Seo Woo Suk
• Son Young Hye
• Choi Kwang Wook

Classifications

• C09K11/642 Primary

  with zinc or cadmium · CPC title

• G02F1/133609

  including means for improving the color mixing, e.g. white · CPC title

• G02F2202/36

  Micro- or nanomaterials · CPC title

• G02F1/133615

  Edge-illuminating devices, i.e. illuminating from the side · CPC title

• G02F2202/046

  fluorescent · CPC title