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US7959312: White light emitting device and white light source module using the same

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Filing Information

Inventor(s) Chul Hee Yoo · Young June Jeong · Young Sam Park · Seong Yeon Han · Ho Yeon Kim · Hun Joo Hahm · Hyung Suk Kim ·
Assignee(s) Samsung LED Co., Ltd. ·
Attorney/Agent(s) Sughrue Mion, PLLC ·
Primary Examiner Thomas M Sember ·
Application Number US12081726
Filing date 04/21/2008
Issue date 06/14/2011
Prior Publication Data
Predicted expiration date 12/05/2027
U.S. Classifications 362/84  · 313/503  · 362/293  · 362/973  · 257/98  · 362/972  ·
International Classifications F21V916  ·
Kind CodeB2
Related U.S. Application DataCROSS-REFERENCE TO RELATED APPLICATIONS
This application is a Divisional of U.S. application Ser. No. 11/987,830, filed Dec. 5, 2007, and claims the priority of Korean Patent Application Nos. 2006-122631 filed on Dec. 5, 2006 and 2007-12112 filed on Feb. 6, 2007, in the Korean Intellectual Property Office, the disclosures of each of which are incorporated herein by reference.
Foreign Priority KR1020060122631 - 12/05/2006 · KR1020070012112 - 02/06/2007 ·
23 Claims, 8 Drawings


Abstract

A white light emitting device including: a blue light emitting diode chip having a dominant wavelength of 443 to 455 nm; a red phosphor disposed around the blue light emitting diode chip, the red phosphor excited by the blue light emitting diode chip to emit red light; and a green phosphor disposed around the blue light emitting diode chip, the green phosphor excited by the blue light emitting diode chip to emit green light, wherein the red light emitted from the red phosphor has a color coordinate falling within a space defined by four coordinate points (0.5448, 0.4544), (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633) based on the CIE 1931 chromaticity diagram, and the green light emitted from the green phosphor has a color coordinate falling within a space defined by four coordinate points (0.1270, 0.8037), (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.5030) based on the CIE 1931 color chromaticity diagram.

Independent Claims | See all claims (23)

  1. 1. A white light source module comprising: a circuit board; a blue light emitting diode chip disposed on the circuit board; a red phosphor disposed around the blue light emitting diode chip, the red phosphor excited by the blue light emitting diode chip to emit red light; and a green phosphor disposed around the blue light emitting diode chip, the green phosphor excited by the blue light emitting diode chip to emit green light, wherein the red light emitted from the red phosphor has a color coordinate falling within a space defined by four coordinate points (0.5448, 0.4544), (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633) based on the CIE 1931 color chromaticity diagram, and the green light emitted from the green phosphor has a color coordinate falling within a space defined by four coordinate points (0.1270, 0.8037), (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.5030) based on the CIE 1931 color chromaticity diagram.
  2. 8. A white light emitting device comprising: a blue light emitting diode chip having a full width at half-maximum of 10 to 30 nm; a red phosphor disposed around the blue light emitting diode chip, the red phosphor excited by the blue light emitting diode chip to emit red light; and a green phosphor disposed around the blue light emitting diode chip, the green phosphor excited by the blue light emitting diode chip to emit green light, wherein the red light emitted from the red phosphor has a color coordinate falling within a space defined by four coordinate points (0.5448, 0.4544), (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633) based on the CIE 1931 chromaticity diagram, and the green light emitted from the green phosphor has a color coordinate falling within a space defined by four coordinate points (0.1270, 0.8037), (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.5030) based on the CIE 1931 color chromaticity diagram.
  3. 15. A display device comprising: a display panel; and a backlight unit which emits light to the display panel, the backlight unit comprising a white light source module, wherein the white light source module comprises: a circuit board; a blue light emitting diode chip disposed on the circuit board; a red phosphor disposed around the blue light emitting diode chip, the red phosphor excited by the blue light emitting diode chip to emit red light; and a green phosphor disposed around the blue light emitting diode chip, the green phosphor excited by the blue light emitting diode chip to emit green light, wherein the red light emitted from the red phosphor has a color coordinate falling within a space defined by four coordinate points (0.5448, 0.4544), (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633) based on the CIE 1931 color chromaticity diagram, and the green light emitted from the green phosphor has a color coordinate falling within a space defined by four coordinate points (0.1270, 0.8037), (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.5030) based on the CIE 1931 color chromaticity diagram.
  4. 19. A display device comprising: a display panel; and a backlight unit which emits light to the display panel, the backlight unit comprising a white light emitting device, wherein the white light emitting device comprises: a blue light emitting diode chip; a red phosphor disposed around the blue light emitting diode chip, the red phosphor excited by the blue light emitting diode chip to emit red light; and a green phosphor disposed around the blue light emitting diode chip, the green phosphor excited by the blue light emitting diode chip to emit green light, wherein the red light emitted from the red phosphor has a color coordinate falling within a space defined by four coordinate points (0.5448, 0.4544), (0.7079, 0.2920), (0.6427, 0.2905) and (0.4794, 0.4633) based on the CIE 1931 chromaticity diagram, and the green light emitted from the green phosphor has a color coordinate falling within a space defined by four coordinate points (0.1270, 0.8037), (0.4117, 0.5861), (0.4197, 0.5316) and (0.2555, 0.5030) based on the CIE 1931 color chromaticity diagram.

References Cited

U.S. Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
US6686691* Lumileds Lighting, U.S., LLC Mueller et al. Feb 2004
US7052152* Philips Lumileds Lighting Company, LLC Harbers et al. May 2006
US7250715 Philips Lumileds Lighting Company, LLC Mueller et al. Jul 2007
US7564180 Cree, Inc. Brandes Jul 2009
US20060045832 Dowa Mining Co., Ltd. Nagatomi et al. Mar 2006
US20060197098 Citizen Electronics Co. Ltd. Aihara Sep 2006
US20060197432 DOWA MINING CO., LTD. Nagatomi et al. Sep 2006
US20070182887 HAGA SHUICHI Haga et al. Aug 2007
US20080048193* SAMSUNG ELECTRO-MECHANICS CO., LTD. Yoo et al. Feb 2008
US20080180948 SAMSUNG ELECTRO-MECHANICS CO., LTD. Yoon et al. Jul 2008
US20080265269 SAMSUNG ELECTRO-MECHANICS CO., LTD. Yoo et al. Oct 2008
US20090059579 Shin et al. Mar 2009
US20090140630 Mitsubishi Chemical Corporation Kijima et al. Jun 2009

Foreign Patent Documents

Document NumberAssigneesInventorsIssue/Pub Date
EP1566848Philips Lumileds Lighting Company LLCAug 2005
JP2002531956Sep 2002
JP2005277127STANLEY ELECTRIC CO LTDOct 2005
JP2006041096NICHIA CHEM IND LTDFeb 2006
JP200663233Mar 2006
JP2006237113SUMITOMO CHEMICAL CO LTDSep 2006
JP2006241249DOWA MINING CO LTDSep 2006
JP2006245443CITIZEN ELECTRONICS CO LTDSep 2006
KR20030026351Mar 2003
WO200033390GENERAL ELECTRIC COMPANYJun 2000
WO200215806SYNTHES AG CHURFeb 2002
WO2006019016SONY CORPORATIONFeb 2006
WO2006098450MITSUBISHI CHEMICAL CORPORATIONSep 2006
WO2006126817SEOUL SEMICONDUCTOR CO., LTD.Nov 2006
WO2006121196MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.Nov 2006
* cited by examiner

Other Publications

European Search Report, with written opinion, issuedin European Patent Application No. 08250974.6-1235 dated on Aug. 28, 2008.
Office Action dated Jun. 15, 2010 from the Japanese Patent Office in counterpart Application No. 2007-314934.
Office Action dated Jun. 24, 2010 from the USPTO in corresponding U.S. Appl. No. 11/987,830.
Chih-Chieh Yang et al.: “Highly stable three-band white light from an InGaN-based blue light emitting diode chip precoated with (oxy) nitride green/red phosphors”, Mar. 20, 2007, DOI: 10.1063/1.2714326. pp. 123503-1 to 123503-3.
Xianqing Piao, et al.: “Preparation of CaAISiN3: Eu2+ Phosphors by the Self-Propagating High-Temperature Synthesis and Their Luminescent Properties”, Chem. Mater., vol. 19 No. 18, Nov. 8, 2007. pp. 4592-4599.
Naoto Hirosaki, et al.: “Characterization and properties of green-emitting β-SiAION:Eu2+ powder phosphors for white light-emitting diodes”, May 17, 2005, DOI: 10.1063/1.1935027, pp. 211905-1 to 211905-3.
Notification of the First Office Action dated Aug. 12, 2010, issued by the State Intellectual Property Office of P.R.C. in counterpart Chinese Application No. 200810084540.7.
Yang et al., “Highly Stable Three-Band White Light from an InGan-Based Blue Light-Emitting Diode Chip Precoated with (Oxy)nitride Greed/Red Phosphors,” pp. 123503-1-123503-3, vol. 90, No. 12, Applied Physics Letters, published on Mar. 20, 2007.
Piao et al., “Preparation of CaAISiN3: Eu2+ Phosphors by the Self-Propagating High-Temperature Synthesis and Their Luminescent Properties,” pp. 4592-4599, vol. 19, No. 18, Chem. Mater., published on Aug. 11, 2007.
Hirosaki et al., “Characterization and Properties of Green-Emitting β-SiAION: Eu2+ Powder Phosphors for White Light-Emitting Diodes,” pp. 211905-1-211905-3, vol. 86, No. 21, Applied Physics Letters, published on May 17, 2005.
State Intellectual Property Office of P.R.C., “Notification of the First Office Action,” issued in connection with Chinese Patent Application No. 200810084540.7, dated Aug. 12, 2010.
United States Patent and Trademark Office, “Non-Final Office Action,” issued in connection with U.S. Appl. No. 11/987,830, dated May 6, 2010.
United States Patent and Trademark Office, “Non-Final Office Action,” issued in connection with U.S. Appl. No. 11/987,830, dated Jan. 6, 2011.
USPTO Final Office Action dated Feb. 10, 2011 issued in co-pending U.S. Appl. No. 11/987,830.
Communication from the Japanese Patent Office dated Jan. 4, 2011, in Application No. 2007-314934.

Referenced By

Document NumberAssigneeInventorsIssue/Pub Date
US8552438 --
US8851731 --
US8846424 --

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