LUMINESCENT COLOR CONVERSION MEMBER AND LIGHT EMITTING DEVICE

• US 20150275073A1
• Filed: 02/25/2015
• Published: 10/01/2015
• Est. Priority Date: 03/28/2014
• Status: Active Grant

• Current Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Original Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Inventors: WADA, Satoshi
• Granted Patent: US 9,598,633 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: C09K 11/02 Use of particular materials as binders, particle coatings or suspension media therefor
• CPC Class Codes: C09K 11/08 containing inorganic luminescent materials
• CPC Class Codes: H01L 25/0753 the devices being arranged next to each other
• CPC Class Codes: H01L 2924/00 Indexing scheme for arrangements or methods for connecting or disconnecting semiconductor or solid-state bodies as covered by H01L24/00
• CPC Class Codes: H01L 2924/0002 Not covered by any one of groups H01L24/00, H01L24/00 and H01L2224/00
• CPC Class Codes: H01L 2933/005 relating to encapsulations
• CPC Class Codes: H01L 33/54 having a particular shape

Abstract

A luminescent color conversion member of a light emitting device includes a glass and integrated particles dispersed inside the glass, each of the integrated particles being a mixture of phosphors and a dispersively binding material that are bonded to each other. The luminescent color conversion member is configured as a sintered body of a mixture of the integrated particles and glass particles. The dispersively binding material is a non-glass material having transparency and bondability to the phosphors.

Claims

1. A luminescent color conversion member comprising:

a glass; and

integrated particles dispersed inside the glass, each of the integrated particles being a mixture of phosphors and a dispersively binding material that are bonded to each other,

wherein the luminescent color conversion member is configured as a sintered body of a mixture of the integrated particles and glass particles, and

wherein the dispersively binding material is a non-glass material having transparency and bondability to the phosphors.

2. The luminescent color conversion member according to claim 1, wherein the phosphors are garnet-based phosphors and the dispersively binding material is an alumina.

3. The luminescent color conversion member according to claim 1, wherein a particle size of the phosphors is in a range of 1 μ

m to 7 μ

m.

4. The luminescent color conversion member according to claim 3, wherein the particle size of the phosphors is substantially equal to a particle size of the dispersively binding material.

5. The luminescent color conversion member according to claim 1, wherein a particle size of the glass particles is equal to or greater than 15 μ

m.

6. The luminescent color conversion member according to claim 5, wherein a particle size of the integrated particles is substantially equal to the particle size of the glass particles.

7. A light emitting device comprising a light emitting element, and a luminescent color conversion member,

wherein the luminescent color conversion member comprises:

a glass; and

integrated particles dispersed inside the glass, each of the integrated particles being a mixture of phosphors and a dispersively binding material that are bonded to each other,

wherein the luminescent color conversion member is configured as a sintered body of a mixture of the integrated particles and glass particles, and

wherein the dispersively binding material is a non-glass material having transparency and bondability to the phosphors.

wherein the luminescent color conversion member is configured and arranged such that primary light and secondary light are mixed to generate a mixed color light and such that the mixed-color light is emitted outside from the luminescent color conversion member, the primary light being excitation light emitted by the light emitting element, and the secondary light being a portion of the primary light that has been color-converted by an excitation of the phosphors contained in the luminescent color conversion member.