Title of Invention	LIGHT EMITTING DEVICE
Abstract	Disclosed is a light-emitting device which has few variations in color tone and excellent color reproducibility while attaining good color rendering properties and/or high luminous efficiency. Specifically disclosed is a light-emitting device composed of an excitation light source (10) emitting an excitation light (1), a wavelength converting member (30) which absorbs the excitation light (1) emitted from the excitation light source (10) and converts the wavelength thereof for emitting a light (2) in a certain wavelength range, and a light guide for guiding the excitation light (1) emitted from the excitation light source (10) to the wavelength converting member (30) wherein the refractive index of the central (core) portion is higher than that of the circumferential (cladding) portion in a cross section. The wavelength converting member (30) has a structure wherein a plurality of layers for converting the wavelengths of lights having different wavelengths are stacked on top of one another.

Title of Invention

LIGHT EMITTING DEVICE

Abstract

Disclosed is a light-emitting device which has few variations in color tone and excellent color reproducibility while attaining good color rendering properties and/or high luminous efficiency. Specifically disclosed is a light-emitting device composed of an excitation light source (10) emitting an excitation light (1), a wavelength converting member (30) which absorbs the excitation light (1) emitted from the excitation light source (10) and converts the wavelength thereof for emitting a light (2) in a certain wavelength range, and a light guide for guiding the excitation light (1) emitted from the excitation light source (10) to the wavelength converting member (30) wherein the refractive index of the central (core) portion is higher than that of the circumferential (cladding) portion in a cross section. The wavelength converting member (30) has a structure wherein a plurality of layers for converting the wavelengths of lights having different wavelengths are stacked on top of one another.

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Documents:

http://ipindiaonline.gov.in/patentsearch/GrantedSearch/viewdoc.aspx?id=RLt9ETPz2C86bKfnIshDcg==&loc=egcICQiyoj82NGgGrC5ChA==

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Patent Number

269846

Indian Patent Application Number

1291/CHENP/2007

PG Journal Number

46/2015

Publication Date

13-Nov-2015

Grant Date

11-Nov-2015

Date of Filing

28-Mar-2007

Name of Patentee

NICHIA CORPORATION

Applicant Address

491-100, OKA, KAMINAKA-CH0 ANAN-SHI, TOKUSHIMA 774-8601 JAPAN

Inventors:

#	Inventor's Name	Inventor's Address
1	HAMA,ATSUTOMO	NICHIA CORPORATION 491-100, OKA, KAMINAKA-CH0 ANAN-SHI, TOKUSHIMA 774-8601 JAPAN
2	HONDA, TOMOTAKA	NICHIA CORPORATION 491-100, OKA, KAMINAKA-CH0 ANAN-SHI, TOKUSHIMA 774-8601 JAPAN
3	NAGAHAMA, SHINICHI,	NICHIA CORPORATION 491-100, OKA, KAMINAKA-CH0 ANAN-SHI, TOKUSHIMA 774-8601 JAPAN
4	TAKEICHI,JUNJI	NICHIA CORPORATION 491-100, OKA, KAMINAKA-CH0 ANAN-SHI, TOKUSHIMA 774-8601 JAPAN
5	MURAZAKI,YOSHINORI,	NICHIA CORPORATION 491-100, OKA, KAMINAKA-CH0 ANAN-SHI, TOKUSHIMA 774-8601 JAPAN
6	TAMAKI,HIROTO	NICHIA CORPORATION 491-100, OKA, KAMINAKA-CH0 ANAN-SHI, TOKUSHIMA 774-8601 JAPAN
7	HAYASHI, YUKIHIRO	NICHIA CORPORATION 491-100, OKA, KAMINAKA-CH0 ANAN-SHI, TOKUSHIMA 774-8601 JAPANNICHIA CORPORATION 491-100, OKA, KAMINAKA-CH0 ANANa-SHI, TOKUSHIMA 774-8601 JAPAN

PCT International Classification Number

G02B 6/00

PCT International Application Number

PCT/JP05/17823

PCT International Filing date

2005-09-28

PCT Conventions:

#	PCT Application Number	Date of Convention	Priority Country
1	2004-289653	2004-10-01	Japan
2	2005-154899	2005-05-27	Japan
3	2005-085600	2005-03-24	Japan
4	2005-031992	2005-02-08	Japan