EP1220578A2 - Procédé et dispositif pour modifier la température de couleur - Google Patents

Procédé et dispositif pour modifier la température de couleur Download PDF

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Publication number
EP1220578A2
EP1220578A2 EP01890346A EP01890346A EP1220578A2 EP 1220578 A2 EP1220578 A2 EP 1220578A2 EP 01890346 A EP01890346 A EP 01890346A EP 01890346 A EP01890346 A EP 01890346A EP 1220578 A2 EP1220578 A2 EP 1220578A2
Authority
EP
European Patent Office
Prior art keywords
light
emitting diodes
lighting device
color
switching power
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP01890346A
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German (de)
English (en)
Other versions
EP1220578A3 (fr
Inventor
Harald Schweigert
Stefan Gut
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Siemens AG Oesterreich
Original Assignee
Siemens AG Oesterreich
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 Siemens AG Oesterreich filed Critical Siemens AG Oesterreich
Publication of EP1220578A2 publication Critical patent/EP1220578A2/fr
Publication of EP1220578A3 publication Critical patent/EP1220578A3/fr
Withdrawn legal-status Critical Current

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    • 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]
    • H05B45/20—Controlling the colour of the light

Definitions

  • the invention relates to a method for changing the color temperature and brightness a lighting device, which comprises at least two light-emitting diodes, the light emit different shades.
  • the invention also relates to a lighting device with adjustable color temperature and brightness.
  • Color perception / perception is a psychological phenomenon, which is already well understood through numerous experiments. It has been found that yourself a person's well-being in a room by appropriate choice of lighting can be increased significantly.
  • the color temperature gives the color sensation caused by a luminous body on. It is the temperature that a black body would have to reach in order to be the same To generate color sensation.
  • Illuminations where different color temperatures can be set are, for example, from the field of interior design - here mainly so-called Dimmer - became known.
  • a device of the type mentioned at the outset is presented in DE 199 09 630.
  • illuminants for example fluorescent tubes, are different Colors, but no red color, as well as a diffuser for generating light different Color temperature, used to illuminate a room, setting the desired color temperature from a dedicated lighting control system is made.
  • a disadvantage of the proposed solution is above all that the geometric Dimensions of the diffuser and the fluorescent tubes used in the shape of the Lighting is severely restricted. Therefore, the well-known lighting is suitable, for example not even as table lighting.
  • DE 41 15 187 Another device and a method for generating light of variable color temperature is disclosed in DE 41 15 187.
  • a device with fluorescent tubes for use which are surrounded by reflectors, which side surfaces have one of which is convex and red while another Side surface is gold colored and flat and a third side surface is concave and silver colored is trained.
  • the fluorescent tube emits a light spectrum that that of sunlight on Earth on the day of the summer solstice around noon. ever according to the seasons are used to generate a favorable color temperature in a specifiable Order the reflectors are irradiated.
  • a disadvantage of the device known from DE 41 15 187 is above all that they are expensive to manufacture and above due to the specially designed reflectors is also complicated to install. Furthermore, the spectral bandwidth is adjustable Color temperature relatively low.
  • This object is achieved with a method of the type mentioned in the introduction in that the color temperature of at least three light emitting diodes, the light of different colors emit, via whose supply voltage and / or whose supply current is set.
  • the same color tone can be used at the same time emitting LEDs are operated.
  • the light emitting diodes of one color become parallel operated.
  • the supply voltages and / or currents of at least one are preferred controllable / adjustable switching power supply supplied.
  • a tried and tested embodiment of the invention provides that the color temperature is set via several switching power supplies, the LEDs being the same Hue emit be controlled via a common switching power supply.
  • the light-emitting diodes are in the form of a matrix to be ordered.
  • a particularly large range of different color temperatures can be set that the light emitting diodes emit red, green and blue light.
  • An illumination device is particularly suitable for implementing the method according to the invention of the type mentioned, in which at least two light-emitting diodes are provided that emit light of different colors, the at least two Light emitting diodes at least one controllable / adjustable switching power supply, which for each of the light emitting diodes provides an adjustable output voltage and / or output current, upstream is.
  • a cheap variant of the invention is that the same color light emitting diodes are connected in parallel.
  • a very favorable variant of the invention provides that the light-emitting diodes are in the form of a Matrix are arranged.
  • the light-emitting diodes are preferably red, green and blue.
  • a lighting device BEL according to the invention for light-emitting diodes which emit the same color tone has a common switching power supply STN1, STN2, STN3, the output voltage U A1 , U A2 , U A3 and output current I A1 , I A2 , I A3 can be regulated via a control AST, for example a suitably equipped computer.
  • the input voltage U N of the switching power supply STN1-STN3 can be, for example, the mains voltage.
  • the LEDs D b , D g , D r are operated in the forward direction, their brightness increases with their operating current. However, there is a maximum permissible current which must not be significantly exceeded, since otherwise the LEDs D b , D g , D r can be destroyed. Depending on the technological design of the light emitting diodes D b , D g , D r , the maximum operating current and the maximum operating voltage can differ significantly from type to type. In order to limit the operating current, a series resistor Rv is connected upstream of each light-emitting diode D b , D g , D r .
  • the output voltage U A1 , U A2 , U A3 and / or the output current, I A1 , I A2 , I A3 can be proportional to the respective supply voltage or the respective supply current of the light-emitting diodes D b , D g , D r and thus the brightness / intensity of the light emitting diodes D b , D g , D r can be regulated. It has been found that a particularly large spectral bandwidth of the color temperature can be set if the light-emitting diodes D b , D g , D r used have the colors red, green and blue.
  • the light-emitting diodes D b , D g , D r which are assigned to a color, can be combined to form blocks.
  • the starting point for the perception of the color temperature are those on which it is based physical color stimuli, i.e. those electromagnetic radiation in the area between 380 and 780 nm, which get into the eye and excite special sensory cells there, so that a color sensation arises.
  • a color stimulus can also be used as a point in an infinite-dimensional Space in which each axis is the intensity of a particular one Represents wavelength (for example in photons per second). Because there are infinite dimensions Spaces are difficult to display, color stimuli are mostly due to their characterized spectral radiation distribution, which indicates how the radiation power is based the individual regions of the spectrum distributed.
  • a predeterminable color temperature can be set by mixing the colors and intensities generated by the light-emitting diodes.
  • the color temperature perceived by a person can be changed by selectively switching on or off LEDs D b , D g , D r of a color or by changing the brightness / intensity.
  • a common switched-mode power supply SNT4 is provided for all light-emitting diodes D b , D g , D r , which has separately controllable outputs for controlling the color temperature, which outputs are assigned a color to the light-emitting diodes D b , D g , D r is shown in.
  • a multi-channel dimmer for example, can be used as the controllable switching power supply SNT4.
  • the light emitting diodes D b , D g , D r can also be controlled individually, it being possible for a switching power supply SNT4 to be provided for each light emitting diode D b , D g , D r .
  • the lighting device BEL according to FIG. 3 has an illumination field FEL, via which the light-emitting diodes D b , D g , D r are arranged in the form of a matrix MAT.
  • This lighting device BEL is particularly suitable as table or make-up lighting.
  • a common switching power supply SNT4 is also assigned to the light-emitting diodes D b , D g , D r here.
  • the arrangement of light-emitting diodes D b , D g , D r of different colors can be made as desired.
  • light emitting diodes D b , D g , D r of one color can form a row and / or column of the matrix MAT.
  • Another possibility is to arrange the light-emitting diodes D b , D g , D r in such a way that a light-emitting diode D b , D g , D r of one color is surrounded by different-colored light-emitting diodes D b , D g , D r .
  • the lighting device can also be used as table lighting for a workplace Use BEL with a big win. Fatigue can be caused by change the color temperature can be prevented. Also, according to the results of the experimental Psychology moods by the color temperature of the lighting to be influenced. Which is why the lighting device BEL is also suitable for therapeutic Use very well.
  • the lighting device BEL according to the invention makes it possible to change the color temperature within a wide spectral range by using light emitting light-emitting diodes D b , D g , D r . It is a further merit of the invention to provide a lighting device BEL which enables an essentially free shaping. With the lighting device BEL according to the invention, practically all types of lighting can be realized (room lighting, table lighting, etc.).

Landscapes

  • Light Sources And Details Of Projection-Printing Devices (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP01890346A 2000-12-21 2001-12-20 Procédé et dispositif pour modifier la température de couleur Withdrawn EP1220578A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT9422000 2000-12-21
AT9422000U 2000-12-21

Publications (2)

Publication Number Publication Date
EP1220578A2 true EP1220578A2 (fr) 2002-07-03
EP1220578A3 EP1220578A3 (fr) 2004-11-17

Family

ID=32996799

Family Applications (1)

Application Number Title Priority Date Filing Date
EP01890346A Withdrawn EP1220578A3 (fr) 2000-12-21 2001-12-20 Procédé et dispositif pour modifier la température de couleur

Country Status (1)

Country Link
EP (1) EP1220578A3 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1487243A1 (fr) * 2003-06-06 2004-12-15 Teknoware Oy Contrôle de la température de couleur d'un module d'éclairage
DE10349553A1 (de) * 2003-06-25 2005-01-20 Public Screen & Lightsystems Ag Verfahren und Schaltungsanordnung zur Helligkeitsregelung von zumindest einer LED
DE102007052854A1 (de) 2007-11-06 2009-05-07 Münchner Hybrid Systemtechnik GmbH Verfahren und Vorrichtung zur Steuerung der Lichtabgabe einer LED-Leuchte
DE102008013049A1 (de) * 2008-03-06 2009-09-24 Mbb International Group Ag Leuchte, insbesondere zur Erzielung eines tageslichtähnlichen Lichtspektrums
DE102008013048A1 (de) * 2008-03-06 2009-09-24 Mbb International Group Ag Leuchte, insbesondere zur Erzielung eines tageslichtähnlichen Leuchtspektrums
DE102010000672A1 (de) * 2010-01-05 2011-07-07 Tridonic Ag Kombiniertes Verfahren zum Betreiben eines elektrischen Leuchtmittels sowie Betriebsschaltung
DE102012211828B4 (de) 2012-07-06 2023-03-02 Lisa Dräxlmaier GmbH LED-Beleuchtung für Fahrzeuge

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5895128A (en) * 1997-01-21 1999-04-20 Minolta Co., Ltd. Electronic flash and a camera provided with the same
US6016038A (en) * 1997-08-26 2000-01-18 Color Kinetics, Inc. Multicolored LED lighting method and apparatus

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5895128A (en) * 1997-01-21 1999-04-20 Minolta Co., Ltd. Electronic flash and a camera provided with the same
US6016038A (en) * 1997-08-26 2000-01-18 Color Kinetics, Inc. Multicolored LED lighting method and apparatus

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1487243A1 (fr) * 2003-06-06 2004-12-15 Teknoware Oy Contrôle de la température de couleur d'un module d'éclairage
US7352137B2 (en) 2003-06-06 2008-04-01 Teknoware Oy Controlling color temperature of lighting fixture
DE10349553A1 (de) * 2003-06-25 2005-01-20 Public Screen & Lightsystems Ag Verfahren und Schaltungsanordnung zur Helligkeitsregelung von zumindest einer LED
DE10349553B4 (de) * 2003-06-25 2007-04-19 Digitallicht Ag Verfahren und Lichtnetzwerk zur Helligkeitsregelung und dynamischen Farbmischung von LED-Einheiten
DE102007052854A1 (de) 2007-11-06 2009-05-07 Münchner Hybrid Systemtechnik GmbH Verfahren und Vorrichtung zur Steuerung der Lichtabgabe einer LED-Leuchte
DE102008013049A1 (de) * 2008-03-06 2009-09-24 Mbb International Group Ag Leuchte, insbesondere zur Erzielung eines tageslichtähnlichen Lichtspektrums
DE102008013048A1 (de) * 2008-03-06 2009-09-24 Mbb International Group Ag Leuchte, insbesondere zur Erzielung eines tageslichtähnlichen Leuchtspektrums
DE102010000672A1 (de) * 2010-01-05 2011-07-07 Tridonic Ag Kombiniertes Verfahren zum Betreiben eines elektrischen Leuchtmittels sowie Betriebsschaltung
DE102012211828B4 (de) 2012-07-06 2023-03-02 Lisa Dräxlmaier GmbH LED-Beleuchtung für Fahrzeuge

Also Published As

Publication number Publication date
EP1220578A3 (fr) 2004-11-17

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