Title:
LIGHT-EMITTING DEVICE
Document Type and Number:
WIPO Patent Application WO/2012/014702
Kind Code:
A1
Abstract:
Disclosed is a light-emitting device which has excellent colour rendering properties and which efficiently emits white light in a light bulb colour region. The light-emitting device (1) emits white light in a light bulb colour region and is provided with at least a light-emitting element (2) which emits blue light, orange phosphors (13) which absorb the blue light and emit orange light; and red phosphors (14) which absorb the blue light and emit red light. The orange phosphors (13) are Ce activation CaAlSiN3 phosphors formed from solid solution crystals wherein Ce and oxygen are in a solid solution on a crystal having a composition represented by the formula: cCaAlSiN3 · (1-c) LiSi2N3 (wherein 0.2 ≤ c ≤ 0.8).
Inventors:
YOSHIMURA, Kenichi (())
吉村 健一 (())
TAKAHASHI, Kohsei (())
高橋 向星 (())
吉村 健一 (())
TAKAHASHI, Kohsei (())
高橋 向星 (())
Application Number:
JP2011/066230
Publication Date:
February 02, 2012
Filing Date:
July 15, 2011
Export Citation:
Assignee:
SHARP KABUSHIKI KAISHA (22-22, Nagaike-cho Abeno-ku, Osaka-sh, Osaka 22, 〒5458522, JP)
シャープ株式会社 (〒22 大阪府大阪市阿倍野区長池町２２番２２号 Osaka, 〒5458522, JP)
NATIONAL INSTITUTE FOR MATERIALS SCIENCE (2-1 Sengen 1-chome, Tsukuba-shi Ibaraki, 47, 〒3050047, JP)
独立行政法人物質・材料研究機構 (〒47 茨城県つくば市千現一丁目２番地１ Ibaraki, 〒3050047, JP)
YOSHIMURA, Kenichi (())
吉村 健一 (())
シャープ株式会社 (〒22 大阪府大阪市阿倍野区長池町２２番２２号 Osaka, 〒5458522, JP)
NATIONAL INSTITUTE FOR MATERIALS SCIENCE (2-1 Sengen 1-chome, Tsukuba-shi Ibaraki, 47, 〒3050047, JP)
独立行政法人物質・材料研究機構 (〒47 茨城県つくば市千現一丁目２番地１ Ibaraki, 〒3050047, JP)
YOSHIMURA, Kenichi (())
吉村 健一 (())
International Classes:
H01L33/50; C09K11/08; C09K11/64
Attorney, Agent or Firm:
HARAKENZO WORLD PATENT & TRADEMARK (Daiwa Minamimorimachi Building, 2-6 Tenjinbashi 2-chome Kita, Kita-ku, Osaka-sh, Osaka 41, 〒5300041, JP)
Claims: