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1. WO2011121489 - LIGHT EMITTING DIODE LIGHT SOURCE

Publication Number WO/2011/121489
Publication Date 06.10.2011
International Application No. PCT/IB2011/051216
International Filing Date 23.03.2011
IPC
H05B 33/08 2006.1
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
33Electroluminescent light sources
08Circuit arrangements for operating electroluminescent light sources
F21K 99/00 2010.1
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
99Subject matter not provided for in other groups of this subclass
CPC
F21K 9/00
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
KNON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
9Light sources using semiconductor devices as light-generating elements, e.g. using light-emitting diodes [LED] or lasers
F21Y 2113/13
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
2113Combination of light sources
10of different colours
13comprising an assembly of point-like light sources
F21Y 2115/10
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
21LIGHTING
YINDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
2115Light-generating elements of semiconductor light sources
10Light-emitting diodes [LED]
H05B 45/28
HELECTRICITY
05ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
BELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
45Circuit arrangements for operating light emitting diodes [LED]
20Controlling the colour of the light
28using temperature feedback
Applicants
  • KONINKLIJKE PHILIPS ELECTRONICS N.V. [NL]/[NL] (AllExceptUS)
  • ZHONG, Hong [US]/[CN] (UsOnly)
  • MEI, Yi [CN]/[CN] (UsOnly)
  • HOSKENS, Roger Cornelis Petrus [NL]/[CN] (UsOnly)
Inventors
  • ZHONG, Hong
  • MEI, Yi
  • HOSKENS, Roger Cornelis Petrus
Agents
  • BEKKERS, Joost
Priority Data
201010140027.202.04.2010CN
Publication Language English (en)
Filing Language English (EN)
Designated States
Title
(EN) LIGHT EMITTING DIODE LIGHT SOURCE
(FR) SOURCE DE LUMIÈRE À DIODES ÉLECTROLUMINESCENTES
Abstract
(EN) A light emitting diode light source (100) is provided in the present invention, comprising a red light emitting diode array (110); a phosphor-coated blue light emitting diode array (120), a color point of the mixed light emitted from the phosphor-coated blue light emitting diode array (120) falling within a quadrilateral of the CIE chromaticity diagram, wherein coordinates of four vertices of the quadrilateral are (0.375, 0.427), (0.390, 0.456), (0.366, 0.430), (0.38, 0.46); wherein, when the junction temperature of light emitting diodes of the phosphor-coated blue light emitting diode array (120) and light emitting diodes of the red light emitting diode array (110) is substantially equal to room temperature, the ratio of the lumen output of the phosphor-coated blue light emitting diode array (120) to the lumen output of the red light emitting diode array (110) is within a range of 4:1 to 1.5:1. With the light emitting diode light source (100) of the present invention, the quality of the warm white light is efficiently improved.
(FR) La présente invention concerne une source de lumière à diodes électroluminescentes (100), comprenant une matrice de diodes électroluminescentes rouges (110), une matrice de diodes électroluminescentes bleues recouvertes de substance fluorescente (120), un point de couleur de la lumière émise depuis la matrice de diodes électroluminescentes bleues recouvertes de substance fluorescente (120) tombant dans un quadrilatère du diagramme de chromaticité CIE, les coordonnées de quatre sommets du quadrilatère étant (0,375, 0,427), (0,390, 0,456), (0,366, 0,430), (0,38, 0,46) ; le rapport de la sortie en lumens de la matrice de diodes électroluminescentes bleues recouvertes de substance fluorescente (120) et de la sortie en lumens de la matrice de diodes électroluminescentes rouges (110) est compris entre 4:1 et 1,5:1 lorsque la température de jonction des diodes électroluminescentes de la matrice de diodes électroluminescentes bleues recouvertes de substance fluorescente (120) et des diodes électroluminescentes de la matrice de diodes électroluminescentes rouges (110) est sensiblement égale à la température ambiante. La source de lumière à diodes électroluminescentes (100) de la présente invention permet d'améliorer efficacement la qualité de la lumière blanche chaude.
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