WO2007054758A1 - Led luminaire having non-uniform lighting capability - Google Patents

Led luminaire having non-uniform lighting capability Download PDF

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Publication number
WO2007054758A1
WO2007054758A1 PCT/IB2005/053712 IB2005053712W WO2007054758A1 WO 2007054758 A1 WO2007054758 A1 WO 2007054758A1 IB 2005053712 W IB2005053712 W IB 2005053712W WO 2007054758 A1 WO2007054758 A1 WO 2007054758A1
Authority
WO
WIPO (PCT)
Prior art keywords
led
assembly
luminaire
output
address
Prior art date
Application number
PCT/IB2005/053712
Other languages
French (fr)
Inventor
Gert Bruning
Original Assignee
Koninklijke Philips Electronics, N.V.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Koninklijke Philips Electronics, N.V. filed Critical Koninklijke Philips Electronics, N.V.
Priority to PCT/IB2005/053712 priority Critical patent/WO2007054758A1/en
Publication of WO2007054758A1 publication Critical patent/WO2007054758A1/en

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/14—Controlling the intensity of the light using electrical feedback from LEDs or from LED modules
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/18—Controlling the light source by remote control via data-bus transmission
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S8/00—Lighting devices intended for fixed installation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/003—Arrangement of electric circuit elements in or on lighting devices the elements being electronics drivers or controllers for operating the light source, e.g. for a LED array
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2105/00—Planar light sources
    • F21Y2105/10—Planar light sources comprising a two-dimensional array of point-like light-generating elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2113/00—Combination of light sources
    • F21Y2113/10—Combination of light sources of different colours
    • F21Y2113/13—Combination of light sources of different colours comprising an assembly of point-like light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING 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
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]

Definitions

  • the present invention relates to light emitting diodes (LEDs) in a luminaire. More specifically, the present invention relates to a non-linear dimming control of a LED based luminaire.
  • FIG. 1 illustrates a known fluorescent luminaire 10 employing a housing 11 defining a chamber.
  • a pair of fluorescent lamps 12 and 13 as well as a ballast 14 are disposed within the chamber of housing 11. While luminaire 10 has historically emitted light that adequately illuminate a room, a limitation of luminaire 10 is uniform light intensity along the entire length of lamps 12 and 13 as represented by the arrows downwardly extending from lamps 12 and 13.
  • the present invention addresses this limitation of luminaire 10 with a LED based luminaire.
  • One form of the present invention is LED luminaire employing a housing defining a chamber.
  • a LED assembly, a LED driver assembly and a LED address assembly are disposed within the chamber.
  • the LED driver assembly and the LED address assembly are in electrical communication with the LED assembly to selectively control a non-uniform light output along the entire length of the LED assembly.
  • electrical communication is defined herein as an electrical connection, an electrical coupling or any other technique for electrically applying an output of one device to an input of another device.
  • FIG. 1 illustrates a fluorescent luminaire as known in the art
  • FIG. 2 illustrates one embodiment of a LED luminaire in accordance with the present invention outputting a first exemplary non-linear emission of light
  • FIG. 3 illustrates the LED luminaire illustrated in FIG. 2 outputting a second exemplary non-linear emission of light
  • FIG. 4 illustrates the LED luminaire illustrated in FIG. 2 outputting a third exemplary non-linear emission of light
  • FIG. 5 illustrates one embodiment of a LED control circuitry in accordance with the present invention
  • FIG. 6 illustrates a second embodiment of a LED control circuitry in accordance with the present invention.
  • a LED luminaire 20 as illustrated in FIGS. 2-4 employs a housing 21 defining a chamber.
  • a LED assembly 30, a LED driver assembly 40 and a LED address assembly 50 are disposed within the chamber of housing 21.
  • the LED assembly 30, in one embodiment comprises a plurality of LEDs.
  • the LED assembly 30 in an alternate embodiment of the present invention comprises a plurality of LED arrays.
  • the shape of the housing 21 may be rectangular as illustrated in FIGS. 2-4, circular or elliptical.
  • the LEDs or LED arrays may be placed in a pattern to reflect the shape of the housing 21.
  • a beam-shaping component such as, for example, a lens or diffractive optical element, may be place above the LEDs or LED arrays to affect the non-uniform lighting output.
  • the lighting output as illustrated in FIG. 2 by the downward directed arrows of varying lengths, is most intense in the midsection of housing 21 and least intense at either end of the housing 21.
  • the lighting output as illustrated in FIG. 3 by the downward directed arrows of varying lengths, is most intense at either end of housing 21 and least intense in the midsection of the housing 21.
  • the lighting output as illustrated in FIG. 4 by the downward directed arrows of varying lengths, is of equal and relatively low intensity from the left-most section to the midsection of housing 21 and is of growing intensity from the midsection to the right-most section of the housing 21.
  • FIGS. 2-4 illustrate several non-uniform light outputs from an essentially limitless manner in which the non-uniform lighting output can be maintained. This variety of output non-uniform lighting may be obtained utilizing the LED control circuitry described in FIGS. 5 and 6.
  • LED assembly 30 employs a plurality of conventional LED arrays LAl-LAx, where x > 1 and each LED array includes a plurality of LEDs for emitting one or more colors.
  • LED driver assembly 40 (FIGS. 2-4) employs a multiple-output driver circuit (“MDC") 41 including circuitry for generating direct current I LE DI-IL ED X
  • LED address assembly 50 (FIGS. 2-4) employs an address control module (“ACM”) 51 that includes a processor for determining the required current levels for each LED array LAl-LAx based on a remote or wired control input (not shown).
  • MDC multiple-output driver circuit
  • ACM address control module
  • the address control module 51 circuitry instructs the multiple-output driver circuit ("MDC") 41 to drive each LED array LAl-LAx with an appropriate specified current level.
  • This appropriate specified current level is a function of a desired lighting output of luminaire 20 as transmitted to address control module 51 via a remote or wired control input (not shown).
  • address control module 51 electrically communicates instructions concerning the required levels of direct currents I LEDI -I LEDX to multiple-output driver circuit (“MDC") 41, which in turn communicates direct currents i L EDi-lL E Dxto LED arrays LAl-LAx, respectively.
  • Multiple-output driver circuit 41 includes circuitry for increasing or decreasing an amperage of one or more of the direct currents I LEDI -I LEDX as a function of the desired lighting output of luminaire 20 as transmitted to control module 51 via a remote or wired control input (not shown).
  • the circuitry for circuit 41 and module 51 is constructed in accordance (1) United States Patent Application Publication US2001/0024112 Al published September 27, 2001, and entitled “Supply Assembly For A LED Lighting Module", (2) United States Patent Application Publication US2003/0085749 Al published May 8, 2003, . and entitled "Supply Assembly For A LED Lighting Module", (3) U.S. Patent Application Serial No.
  • LED assembly 30 again employs a plurality of conventional LED arrays LAl-LAx, where x > 1 and each LED array includes a plurality of LEDs for emitting one or more colors.
  • LED driver assembly 40 employs x number of driver circuits DC 1 -DCx, each including conventional circuitry for generating a direct current I LE D I -ILE D X, respectively.
  • LED address assembly 50 (FIGS. 2-4) employs an address control module (“ACM”) 51, which includes a processor for determining the required current levels for each LED array LAl-LAx based on a remote or wired control input (not shown). The address control module 51 circuitry instructs each of the driver circuits DCl-DCx to drive each LED array LAl-LAx with an appropriate specified current level.
  • ACM address control module
  • address control module 51 electrically communicates an instruction to each, of the driver circuits DCl-DCx directing each driver to provide the required levels of direct currents I LEDI -I LEDX to LED arrays LAl-LAx, respectively.
  • Each driver circuit DCl-DCx includes conventional circuitry for increasing or decreasing an amperage of one or more of the direct currents I LEDI -I LEDX as directed by the address control module 51.
  • An example of such driver circuitry would be an efficient switching regulator, known as a buck-converter, to those skilled in the art, for the operation of changing a higher input voltage to a lower output voltage.
  • a single output switching regulator can be used, depending upon the application: For example, if the input power source is a battery, an up-converter switching regulator may be utilized, as is known to those skilled in the art.
  • the LED assembly 30 in an embodiment of the present invention comprises a plurality of LED arrays.
  • the LED arrays LAl-LAx (FIG. 6) are comprised of a plurality of red LEDs, a plurality of green LED arrays, a plurality of blue LED arrays, and plurality of amber LED arrays.
  • the LED arrays are comprised of one LED each.
  • all the LED arrays LAl-LAx may be comprised of blue LEDs with phosphor coatings to provide a white light lighting output in a uniform or nonuniform manner across the luminaire 20.
  • LED driver assembly 40 and LED address assembly 50 are meant to illustrate a structure for controlling a uniform or non-uniform light output, and are not intended to be exhaustive of all possibilities or to limit what can be fabricated for the aforementioned purpose.
  • LED driver assembly 40 and LED address assembly 50 are meant to illustrate a structure for controlling a uniform or non-uniform light output, and are not intended to be exhaustive of all possibilities or to limit what can be fabricated for the aforementioned purpose.
  • the various ways to provide a uniform or non-uniform light output from luminaire 10 such as, for example, the non-uniform light outputs represented by the arrows downwardly extending from LED assembly 30 as illustrated in FIGS. 2-4.
  • Those having ordinary skill in the art will further appreciate the benefit of employing an embodiment of luminaire 10 in numerous and various environments.

Landscapes

  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Abstract

A LED luminaire (20) employs a housing (21) defining a chamber having a LED assembly (30), a LED driver assembly (40) and a LED address assembly (50) disposed therein. LED driver assembly (40) and LED address assembly (50) control a non-uniform 5 light output from LED assembly (30) by selectively supplying one or more LED currents (ILED 1-ILEDx) to the LED assembly (30) and controlling the amperage of the LED currents (ILED 1-ILEDx).

Description

LED LUMINAIRE HAVING NON-UNIFORM LIGHTING CAPABILITY
The present invention relates to light emitting diodes (LEDs) in a luminaire. More specifically, the present invention relates to a non-linear dimming control of a LED based luminaire.
FIG. 1 illustrates a known fluorescent luminaire 10 employing a housing 11 defining a chamber. A pair of fluorescent lamps 12 and 13 as well as a ballast 14 are disposed within the chamber of housing 11. While luminaire 10 has historically emitted light that adequately illuminate a room, a limitation of luminaire 10 is uniform light intensity along the entire length of lamps 12 and 13 as represented by the arrows downwardly extending from lamps 12 and 13.
The present invention addresses this limitation of luminaire 10 with a LED based luminaire.
One form of the present invention is LED luminaire employing a housing defining a chamber. A LED assembly, a LED driver assembly and a LED address assembly are disposed within the chamber. The LED driver assembly and the LED address assembly are in electrical communication with the LED assembly to selectively control a non-uniform light output along the entire length of the LED assembly.
The term "electrical communication" is defined herein as an electrical connection, an electrical coupling or any other technique for electrically applying an output of one device to an input of another device.
The foregoing form as well as other forms, features and advantages of the present invention will become further apparent from the following detailed description of the presently preferred embodiments, read in conjunction with the accompanying drawings. The detailed description and drawings are merely illustrative of the present invention rather than limiting, the scope of the present invention being defined by the appended claims and equivalents thereof.
FIG. 1 illustrates a fluorescent luminaire as known in the art;
FIG. 2 illustrates one embodiment of a LED luminaire in accordance with the present invention outputting a first exemplary non-linear emission of light;
FIG. 3 illustrates the LED luminaire illustrated in FIG. 2 outputting a second exemplary non-linear emission of light; FIG. 4 illustrates the LED luminaire illustrated in FIG. 2 outputting a third exemplary non-linear emission of light;
FIG. 5 illustrates one embodiment of a LED control circuitry in accordance with the present invention; and FIG. 6 illustrates a second embodiment of a LED control circuitry in accordance with the present invention.
A LED luminaire 20 as illustrated in FIGS. 2-4 employs a housing 21 defining a chamber. A LED assembly 30, a LED driver assembly 40 and a LED address assembly 50 are disposed within the chamber of housing 21. The LED assembly 30, in one embodiment comprises a plurality of LEDs. The LED assembly 30 in an alternate embodiment of the present invention comprises a plurality of LED arrays.
The shape of the housing 21 may be rectangular as illustrated in FIGS. 2-4, circular or elliptical. In such an embodiment, the LEDs or LED arrays may be placed in a pattern to reflect the shape of the housing 21. In a further embodiment of the present invention, a beam-shaping component, such as, for example, a lens or diffractive optical element, may be place above the LEDs or LED arrays to affect the non-uniform lighting output.
The lighting output, as illustrated in FIG. 2 by the downward directed arrows of varying lengths, is most intense in the midsection of housing 21 and least intense at either end of the housing 21. The lighting output, as illustrated in FIG. 3 by the downward directed arrows of varying lengths, is most intense at either end of housing 21 and least intense in the midsection of the housing 21.
The lighting output, as illustrated in FIG. 4 by the downward directed arrows of varying lengths, is of equal and relatively low intensity from the left-most section to the midsection of housing 21 and is of growing intensity from the midsection to the right-most section of the housing 21.
FIGS. 2-4 illustrate several non-uniform light outputs from an essentially limitless manner in which the non-uniform lighting output can be maintained. This variety of output non-uniform lighting may be obtained utilizing the LED control circuitry described in FIGS. 5 and 6.
In one embodiment of luminaire 10, as illustrated in FIG. 5, LED assembly 30 employs a plurality of conventional LED arrays LAl-LAx, where x > 1 and each LED array includes a plurality of LEDs for emitting one or more colors. LED driver assembly 40 (FIGS. 2-4) employs a multiple-output driver circuit ("MDC") 41 including circuitry for generating direct current ILEDI-ILEDX, and LED address assembly 50 (FIGS. 2-4) employs an address control module ("ACM") 51 that includes a processor for determining the required current levels for each LED array LAl-LAx based on a remote or wired control input (not shown). The address control module 51 circuitry instructs the multiple-output driver circuit ("MDC") 41 to drive each LED array LAl-LAx with an appropriate specified current level. This appropriate specified current level is a function of a desired lighting output of luminaire 20 as transmitted to address control module 51 via a remote or wired control input (not shown). Thus, in operation, address control module 51 electrically communicates instructions concerning the required levels of direct currents ILEDI-ILEDX to multiple-output driver circuit ("MDC") 41, which in turn communicates direct currents iLEDi-lLEDxto LED arrays LAl-LAx, respectively.
Multiple-output driver circuit 41 includes circuitry for increasing or decreasing an amperage of one or more of the direct currents ILEDI-ILEDX as a function of the desired lighting output of luminaire 20 as transmitted to control module 51 via a remote or wired control input (not shown). In one embodiment, the circuitry for circuit 41 and module 51 is constructed in accordance (1) United States Patent Application Publication US2001/0024112 Al published September 27, 2001, and entitled "Supply Assembly For A LED Lighting Module", (2) United States Patent Application Publication US2003/0085749 Al published May 8, 2003, . and entitled "Supply Assembly For A LED Lighting Module", (3) U.S. Patent Application Serial No. 60/468,538 filed on May 7, 2003, and entitled "Single Driver For Multiple Light Emitting Diodes", (4) U.S. Patent Application Serial No. 10/323,445 filed December 19, 2002, and entitled "Supply Assembly For An LED Lighting Module", and/or (5) U.S. Patent Application Serial No. 60/468,553 filed May 7, 2003, and entitled "Current Control Method and Circuit for Light Emitting Diodes", all of which are hereby incorporated by reference and assigned to the assignee of this application.
In a second embodiment of luminaire 10, as illustrated in FIG. 6, LED assembly 30 again employs a plurality of conventional LED arrays LAl-LAx, where x > 1 and each LED array includes a plurality of LEDs for emitting one or more colors. LED driver assembly 40 employs x number of driver circuits DC 1 -DCx, each including conventional circuitry for generating a direct current ILEDI-ILEDX, respectively. LED address assembly 50 (FIGS. 2-4) employs an address control module ("ACM") 51, which includes a processor for determining the required current levels for each LED array LAl-LAx based on a remote or wired control input (not shown). The address control module 51 circuitry instructs each of the driver circuits DCl-DCx to drive each LED array LAl-LAx with an appropriate specified current level.
This appropriate specified current level is a function of a desired lighting output of luminaire 20 as transmitted to address control module 51 via a remote or wired control input (not shown). Thus, in operation, address control module 51 electrically communicates an instruction to each, of the driver circuits DCl-DCx directing each driver to provide the required levels of direct currents ILEDI-ILEDX to LED arrays LAl-LAx, respectively.
Each driver circuit DCl-DCx includes conventional circuitry for increasing or decreasing an amperage of one or more of the direct currents ILEDI -ILEDX as directed by the address control module 51. An example of such driver circuitry would be an efficient switching regulator, known as a buck-converter, to those skilled in the art, for the operation of changing a higher input voltage to a lower output voltage. In another embodiment, a single output switching regulator can be used, depending upon the application: For example, if the input power source is a battery, an up-converter switching regulator may be utilized, as is known to those skilled in the art.
The LED assembly 30 in an embodiment of the present invention comprises a plurality of LED arrays. In such an embodiment the LED arrays LAl-LAx (FIG. 6) are comprised of a plurality of red LEDs, a plurality of green LED arrays, a plurality of blue LED arrays, and plurality of amber LED arrays. By applying the appropriate currents ILEDI - luEDxto one of more of these pluralities of arrays, a color control as well as a uniform or nonuniform illumination control across the luminaire 20 may be achieved. In a second embodiment of the present invention, the LED arrays are comprised of one LED each. In a third embodiment of the present, all the LED arrays LAl-LAx, may be comprised of blue LEDs with phosphor coatings to provide a white light lighting output in a uniform or nonuniform manner across the luminaire 20.
The illustrated embodiments of LED driver assembly 40 and LED address assembly 50 are meant to illustrate a structure for controlling a uniform or non-uniform light output, and are not intended to be exhaustive of all possibilities or to limit what can be fabricated for the aforementioned purpose. By using what is shown and described herein, those having ordinary skill in the art will appreciate the various ways to provide a uniform or non-uniform light output from luminaire 10, such as, for example, the non-uniform light outputs represented by the arrows downwardly extending from LED assembly 30 as illustrated in FIGS. 2-4. Those having ordinary skill in the art will further appreciate the benefit of employing an embodiment of luminaire 10 in numerous and various environments.
In the foregoing specification, the invention has been described with reference to specific embodiments. However, one of ordinary skill in the art appreciates that various modifications and changes can be made without departing from the scope of the present invention as set forth in the claims below. Accordingly, the specification and figures are to be regarded in an illustrative rather than a restrictive sense, and all such modifications are intended to be included within the scope of present invention.

Claims

Claims:
1. A LED luminaire (20), comprising: a housing (21) defining a chamber; a LED assembly (30) disposed within said chamber; a LED driver assembly (40) disposed within said chamber; and a LED address assembly (50) disposed within said chamber, wherein said LED driver assembly (40) and said LED address assembly (50) are in electrical communication with said LED assembly (30) to selectively control a nonuniform lighting output from said LED assembly (30).
2. The LED luminaire (20) of claim 1 , wherein said LED assembly (30) includes a plurality of LED arrays (LAl-LAx); and wherein each LED array (LAl-LAx) includes a plurality of LEDs.
3. The LED luminaire (20) of claim 2, wherein said LED driver assembly (40) includes a LED driver circuit (41) having multiple outputs; and wherein each output of said LED driver circuit (41) is in electrical communication with one LED array of said plurality of LED arrays (LAl-LAx).
4. The LED luminaire (20) of claim 3, wherein said LED address assembly (50) includes a control module (51) having multiple outputs; and wherein each output of said control module (51) is in electrical communication with said LED driver circuit (41) .
5. The LED luminaire (20) of claim 2, wherein said LED driver assembly (40) includes a plurality of LED driver circuits (DCl-DCx); and wherein each LED driver circuit (DCl-DCx) for driving one LED array of said plurality of LED arrays (LAl-LAx).
6. The LED luminaire (20) of claim 5, wherein said LED address assembly (50) includes a control module (51) having multiple outputs; and wherein each output of said control module (51) is in electrical communication with one of said LED driver circuits (DCl-DCx).
PCT/IB2005/053712 2005-11-10 2005-11-10 Led luminaire having non-uniform lighting capability WO2007054758A1 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010047450A1 (en) * 2010-10-04 2012-04-05 Osram Opto Semiconductors Gmbh lighting device
AT16754U1 (en) * 2015-04-15 2020-07-15 Zumtobel Lighting Gmbh Lighting device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6250774B1 (en) * 1997-01-23 2001-06-26 U.S. Philips Corp. Luminaire
US20030174499A1 (en) * 2002-03-14 2003-09-18 Bohlander Richard A. LED light source
WO2003096761A1 (en) * 2002-05-09 2003-11-20 Color Kinetics Incorporated Led diming controller
WO2005101917A1 (en) * 2004-04-15 2005-10-27 Patent-Treuhand- Gesellschaft Für Elektrische Glühlampen Mbh Light regulation device

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6250774B1 (en) * 1997-01-23 2001-06-26 U.S. Philips Corp. Luminaire
US20030174499A1 (en) * 2002-03-14 2003-09-18 Bohlander Richard A. LED light source
WO2003096761A1 (en) * 2002-05-09 2003-11-20 Color Kinetics Incorporated Led diming controller
WO2005101917A1 (en) * 2004-04-15 2005-10-27 Patent-Treuhand- Gesellschaft Für Elektrische Glühlampen Mbh Light regulation device

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010047450A1 (en) * 2010-10-04 2012-04-05 Osram Opto Semiconductors Gmbh lighting device
US9192021B2 (en) 2010-10-04 2015-11-17 Osram Opto Semiconductors Gmbh Luminous device comprising multiple spaced-apart emission regions
AT16754U1 (en) * 2015-04-15 2020-07-15 Zumtobel Lighting Gmbh Lighting device

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