Light-emitting device

• US 20030122482A1
• Filed: 06/14/2002
• Published: 07/03/2003
• Est. Priority Date: 06/15/2001
• Status: Active Grant

• Current Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Original Assignee: Toyoda Gosei Company Limited (Toyota Motor Corporation)
• Inventors: Nawashiro, Mitsuhiro, Yamanaka, Osamu
• Granted Patent: US 6,841,933 B2
• Time in Patent Office: Days
• US Class Current: 313/512
• CPC Class Codes: B32B 27/00 Layered products comprising a layer of synthetic resin fibrous or filamentary layer made of a synthetic resin B32B5/02; particulate layer made of a synthetic resin B32B5/16; foamed layer made of a synthetic resin B32B5/18
• CPC Class Codes: C09K 11/06 containing organic luminescent materials
• CPC Class Codes: H01L 2224/49107 on the semiconductor or solid-state body
• CPC Class Codes: H01L 2924/01025 Manganese [Mn]
• CPC Class Codes: H01L 2924/01066 Dysprosium [Dy]
• CPC Class Codes: H01L 2924/01079 Gold [Au]
• CPC Class Codes: H01L 2924/12041 LED
• CPC Class Codes: H01L 33/501 characterised by the materials, e.g. binder
• CPC Class Codes: H01L 33/56 Materials, e.g. epoxy or silicone resin
• CPC Class Codes: Y10T 428/2991 Coated

Abstract

A light-release side of a light-emitting element having a main emission peak wavelength in a wavelength range of not longer than 500 nm is covered with a sealing resin containing organic fluorescent substance-containing silicone as an additive.

Claims

1. A light-emitting device comprising:

a light-emitting element;

a first sealing member for covering a light release side of said light-emitting element; and

a silicone member containing at least one kind of organic fluorescent substance and added into said first sealing member.

2. A light-emitting device according to claim 1, wherein a main emission peak wavelength of said light-emitting element is in a wavelength range of from 360 nm to 400 nm.

3. A light-emitting device according to claim 1, wherein said light-emitting element is a Group III nitride compound semiconductor light-emitting element.

4. A light-emitting device according to claim 1, wherein said silicone member is shaped like a ball.

5. A light-emitting device according to claim 4, wherein said silicone member has a diameter in a range of from 1 μ

m to 50 μ

m.

6. A light-emitting device according to claim 1, wherein said silicone member is made of a silicone resin impregnated with said organic fluorescent substance.

7. A light-emitting device according to claim 1, wherein said silicone member is localized on the light-emitting element side of said first sealing member.

8. A light-emitting device according to claim 1, wherein different kinds of organic fluorescent substances are used as said at least one kind of organic fluorescent substance.

9. A light-emitting device according to claim 8, wherein said different kinds of organic fluorescent substances are contained in said silicone member individually and respectively.

10. A light-emitting device according to claim 1, wherein said first sealing member is made of an epoxy resin.

11. A light-emitting device according to claim 1, further comprising at least one kind of inorganic fluorescent substance.

12. A light-emitting device according to claim 11, wherein said inorganic fluorescent substance is a green fluorescent substance.

14. A light-emitting device according to claim 1, wherein a main emission peak wavelength of said light-emitting element is not longer than 500 nm.

13. A light-emitting device according to claim, further comprising a second sealing member formed for covering said first sealing member.