logo

For the Inventor, By the Inventor

The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 9184353 B1

PDFFull Text
Date of Patent:
Nov. 10, 2015

Filed:

Feb. 05, 2015

Light-emitting device

Applicant:

Sharp Kabushiki Kaisha, Osaka, JP;

Inventors:

Masatsugu Masuda, Osaka, JP;

Kenji Terashima, Osaka, JP;

Assignee:

SHARP KABUSHIKI KAISHA, Osaka, JP;

Attorney:

Nixon & Vanderhye P.C.

Primary Examiner:

Elmito Breval

Int. Cl.
CPC ...
H01L 33/50 (2010.01); H01L 33/32 (2010.01); H01L 33/56 (2010.01); G02F 1/1335 (2006.01); C09K 11/08 (2006.01); C09K 11/77 (2006.01); H05B 33/14 (2006.01);
U.S. Cl.
CPC ...
H01L 33/504 (2013.01); C09K 11/0883 (2013.01); C09K 11/7734 (2013.01); G02F 1/1336 (2013.01); H01L 33/32 (2013.01); H01L 33/505 (2013.01); H01L 33/507 (2013.01); H01L 33/56 (2013.01); H05B 33/14 (2013.01); G02F 2001/133614 (2013.01); H01L 33/502 (2013.01);
Abstract

Disclosed is a light-emitting device () including a light-emitting element () emitting primary light, and a light converter () absorbing a part of the primary light emitted from the light-emitting element () and emitting secondary light having a longer wavelength than the primary light. The light converter () contains a green light-emitting phosphor () and a red light-emitting phosphor (). The green light-emitting phosphor () is composed of at least one phosphor selected from a divalent europium-activated oxynitride phosphor substantially represented by the following formula: EuSiAlONand a divalent europium-activated silicate phosphor substantially represented by the following formula: 2(BaMIEu)O.SiO, while the red light-emitting phosphor () is composed of at least one phosphor selected from tetravalent manganese-activated fluoro-tetravalent metalate phosphors substantially represented by the following formulae: MII(MIIIMn)Fand/or MIV(MIIIMn)F. Consequently, the light-emitting device () has excellent color gamut (NTSC ratio).

Find Patent Forward Citations

Loading…