EP3905853A1 - Luminaire led à couleur de lumière réglable en continu - Google Patents

Luminaire led à couleur de lumière réglable en continu Download PDF

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Publication number
EP3905853A1
EP3905853A1 EP21170076.0A EP21170076A EP3905853A1 EP 3905853 A1 EP3905853 A1 EP 3905853A1 EP 21170076 A EP21170076 A EP 21170076A EP 3905853 A1 EP3905853 A1 EP 3905853A1
Authority
EP
European Patent Office
Prior art keywords
current
luminaire
led module
strings
strand
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.)
Pending
Application number
EP21170076.0A
Other languages
German (de)
English (en)
Inventor
Hans Haselberger
Markus Rhein
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.)
Siteco GmbH
Original Assignee
Siteco GmbH
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 Siteco GmbH filed Critical Siteco GmbH
Publication of EP3905853A1 publication Critical patent/EP3905853A1/fr
Pending 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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/46—Details of LED load circuits with an active control inside an LED matrix having LEDs disposed in parallel lines
    • 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
    • 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]
    • H05B45/30—Driver circuits
    • H05B45/35—Balancing circuits
    • 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
    • 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
    • H05B47/19—Controlling the light source by remote control via wireless transmission

Definitions

  • the present invention relates to an LED lamp, and more particularly to an LED lamp the color of which is adjustable.
  • the object of the present invention is to provide an LED light that can provide different colors with little effort.
  • the object is achieved by a luminaire according to claim 1.
  • the luminaire comprises at least three strands of one or more LEDs connected in series, the strands emitting light in different colors.
  • the logical and physical color mixture is shifted from the electronic ballast (EVG) to the LED module.
  • the LED module distributes the current from the preferably current-regulated electronic ballast to the at least three LED strings.
  • the power supply for all strings is provided by a common single-channel electronic ballast, which supplies the entire luminaire module, in which all strings are located.
  • the current regulator can be used to adjust the ratio of the current flows in the individual strands in order to create the desired mixed color. It is particularly advantageous that the current regulators are provided in the current lines and the control device is provided in the LED module, which overall only needs to be connected to a single-channel electronic ballast. In comparison to solutions from the prior art, in which different sub-areas of LED arrangements are interconnected to produce a desired mixed color, it is no longer necessary to provide multi-channel electronic ballasts for each sub-area of the LED arrangement.
  • an electronic ballast with only one channel is sufficient because the division of the current flows over the various strings is only switched in the LED module by the current regulator in the individual strings, controlled by the current regulator.
  • the electronic ballast can only provide the power for the entire module, unaffected by this.
  • the one or more LEDs of the first strand are red
  • the one or more LEDs of the second strand are green
  • the one or more LEDs of the third strand are blue.
  • the LED module including the current regulator provided in each strand and the control device is mounted interchangeably in the luminaire and the electronic ballast is installed outside the LED module in the luminaire. Since the current regulator and the control device are arranged in the LED module, and the power supply for the entire LED module is only provided by the single-channel electronic ballast, the components can be inserted separately in the luminaire. If individual light sources are defective, the LED module can be replaced without having to replace the ballast. Furthermore, it is also possible to provide different LED modules for the same type of luminaire in order to further increase the variability of the type of luminaire with regard to light colors. In addition, the electronic ballast in the luminaire can also be replaced independently of the LED module in the event of a defect.
  • the control unit is set up to switch at least one current regulator completely low-resistance, ie ⁇ 3 ohms, in each switching state in which the lamp is not completely switched off.
  • one strand is always fully open, ie in this strand the current through the one or more LEDs is not regulated and is highest or possibly the same as other strands that are also fully open. Since the current regulator has a low resistance, the efficiency of the luminaire is maximum. Only in one or more strands, which should only contribute less light to the overall color temperature of the luminaire, is there a loss due to the current regulator not being fully opened.
  • the electronic ballast provides a constant current for supplying power to the LED module.
  • This embodiment ensures that the current flow through the LEDs of one or more fully opened strings corresponds to the constant current provided by the electronic ballast. Only those strands which should only contribute a smaller proportion of the light of the mixed color of the lamp to be set are supplied by a lower current in relation to the current through the fully opened strings.
  • the current intensity in the fully opened strings is maintained regardless of the internal resistance of the entire LED module, which can change at any time depending on the circuit status of the current regulator.
  • the control unit comprises a microcontroller and a, preferably non-volatile, memory which is set up to store several circuit states of the current regulators, which can be called up via the microcontroller for setting the current regulators.
  • a lookup table can be stored in the memory which contains the control parameters for the current regulators of the individual strands to achieve different mixed colors.
  • the control unit can read out the control parameters from the memory in order to set the current regulator accordingly.
  • predetermined current ratios for achieving defined mixed colors can also be stored during the manufacture of the lamp. A desired color can be selected from these predetermined circuit states at any time during the installation of the lamp or also during its operation, in that the corresponding parameters are read out from the memory by the control unit.
  • the control unit is set up to switch the current regulator to low resistance, i.e. ⁇ 3 ohms, in one of the three strings and to regulate the current regulator continuously between low and high resistance, i.e.> 1 MOhm, in at least one of the two further strands.
  • the mixed color can be regulated continuously by changing the setting of the current regulator between the low-resistance and the high-resistance state. Furthermore, there are no losses in the string, the current regulator of which is switched to low resistance and thus contributes to the largest proportion of the light emitted by the lamp.
  • the luminaire has at least one interface which is set up to control the control unit via a device outside the luminaire. This embodiment makes it possible to set up the luminaire even after it has been installed on site to produce various desired mixed colors.
  • the interface is a wireless interface which is set up to control the lamp individually.
  • the light can be set on site with a remote control, e.g. via near-field communication, Bluetooth or WLAN.
  • the installation effort is minimized because no separate cabling is required to change the setting.
  • the interface is wired and can be connected to a bus system which is set up to control several similar lamps.
  • a bus system which is set up to control several similar lamps.
  • a whole series of structurally identical lights for example for street lighting or for lighting a room in a building, can be provided, each Luminaire can produce a preferred mixed color individually according to its location.
  • the lights themselves can all be of the same type.
  • the control unit is set up to use the current regulator in at least one of the strings to compensate for the current through the string to compensate for a loss of luminous flux caused by aging of the LEDs in the string by increasing the current flowing through the relevant string.
  • LEDs emit a weaker luminous flux for a given current intensity or a changing color spectrum in the course of their operating time.
  • this goal can be achieved simply by the current regulation with the individual strings in the LED module, which is already present. No separate controls are required because the current through one or all strings of the LED module is possible by means of the current regulator that is already present.
  • the control device Only the control device has to be programmed accordingly in order to adapt the luminous flux of the LEDs according to the aging conditions. If the color of the LEDs changes, the compensation can be done by changing the current distribution over the various strings. If, for example, the light color red weakens over the course of the age of the relevant LED, a proportion of red light can be added by increasing the current through the relevant string with LEDs that have a red component to compensate for the age-related color change.
  • FIG. 1 only an LED module is shown, which is operated together with an electronic ballast (EVG) in a luminaire.
  • the electronic ballast is a single-channel ballast, ie only one, preferably constantly regulated, current is provided for an LED module to be connected.
  • the LED module itself has several channels, which are also referred to as strings in the following.
  • one strand (R) for red, one strand (G) for yellow and one strand (B) for blue are provided.
  • even more strands with additional colors can be provided.
  • These three colors represent the basic colors of the physically adjustable mixed colors of the luminaire.
  • the electrical current supplied by the electronic ballast is in a characteristic ratio split between the strands.
  • the circuit in the LED module serves for this purpose, as in Figure 1 shown.
  • the LED module comprises one or more LEDs that are each connected in a row, a current regulator which regulates the flow of current through the relevant string.
  • the current regulators in all strings are controlled by a common control unit which is provided in the LED module and is also operated by the supply current of the LED module, which is provided by the electronic ballast.
  • the LED module distributes the current from the current-regulated electronic ballast to the at least three, electrically considered symmetrical, LED strings by means of linear current regulators in each strand.
  • FIG. 2a to 2e An example of different settings of the current regulator for mixing the colors red, gray and blue of an LED module according to Figure 1 is in the Figures 2a to 2e shown.
  • the ones in the Figures 2a to 2e The controller positions shown are only examples. Other positions are also conceivable, it is only important that the sum of the currents of all regulators results in a higher value than the total current with which the LED module is energized in order to prevent the current regulators on the LED module work against the ECG regulated to a constant current to which the LED module is connected.
  • a mixed color of all three basic colors red, green and blue in a ratio of 20%: 70%: 10% is set.
  • the current regulator of the color with the largest share is fully open (in the example the color green).
  • the current regulator in this line is low-resistance. Accordingly, it does not generate any losses.
  • the current regulators of the two remaining strings are turned on so that a current flows according to the desired proportion of the corresponding color. In this example, this would be assuming a total current of eg 1000 mA for the current regulator red 200 mA and for the current regulator blue 100 mA.
  • the remaining current of 700 mA flows through the green strand. This results in a mixing ratio of 20%: 70%: 10%.
  • the Figure 2d shows a color mixture in the ratio of 40%: 40%: 20%.
  • the red and green lines are fully regulated (low resistance) and the current regulator of the blue line is opened to the extent that 20% of the total current provided by the electronic ballast still flows through this current.
  • a total current of 1000 mA for example, 400 mA each flow through the red and green strand and 200 mA through the blue strand.
  • the Figure 2e shows an example with a mixing ratio of 20%: 20%: 60%.
  • the blue line is fully regulated, ie low-resistance, and the other two lines are set so that 20% of the total current provided by the ECG flows through these lines.
  • a luminaire with three strands to dynamically change the mixed color is described here, but several strands can also be used to change the color temperature be used. For example, in addition to the three basic colors red, green and blue, two strands with white and amber can be added.
  • one line is always fully open, i.e. the current is not regulated for this line and it is (with) the highest current. If this line is to be regulated in the context of a color change, another line must take over its setting (fully open). The proportionate division of the current takes place only by limiting the current in the lower-powered string (s).
  • the determination of the ratio in which the LED current is divided and the corresponding control of the circuit is carried out in the ⁇ C of the LED module on the basis of the memory content of the non-volatile memory.
  • a purely analog solution e.g. potentiometer, switch matrix, etc ... can be implemented instead of the setpoint specification via the control interface and microcontroller.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Circuit Arrangement For Electric Light Sources In General (AREA)
EP21170076.0A 2020-04-28 2021-04-23 Luminaire led à couleur de lumière réglable en continu Pending EP3905853A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102020111580.6A DE102020111580A1 (de) 2020-04-28 2020-04-28 LED-Leuchte mit stufenlos einstellbarer Lichtfarbe

Publications (1)

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EP3905853A1 true EP3905853A1 (fr) 2021-11-03

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EP21170076.0A Pending EP3905853A1 (fr) 2020-04-28 2021-04-23 Luminaire led à couleur de lumière réglable en continu

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EP (1) EP3905853A1 (fr)
DE (1) DE102020111580A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130063035A1 (en) * 2011-09-12 2013-03-14 Juno Manufacturing, LLC Dimmable led light fixture having adjustable color temperature
US20140210357A1 (en) * 2013-01-25 2014-07-31 Iwatt Inc. Adjusting Color Temperature in a Dimmable LED Lighting System
DE202015103127U1 (de) * 2015-06-15 2016-09-19 Tridonic Gmbh & Co Kg LED-Modul mit veränderbarem Farbort und Beleuchtungsgerät mit einem solchen LED-Modul
EP3541148A1 (fr) * 2018-03-14 2019-09-18 Siteco Beleuchtungstechnik GmbH Lampe paramétrable avec un module de del et un module de mémoire à fonction de communication en champ proche
US20200120770A1 (en) * 2018-10-16 2020-04-16 Cree, Inc. Solid state luminaire with field-configurable cct and/or luminosity

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130063035A1 (en) * 2011-09-12 2013-03-14 Juno Manufacturing, LLC Dimmable led light fixture having adjustable color temperature
US20140210357A1 (en) * 2013-01-25 2014-07-31 Iwatt Inc. Adjusting Color Temperature in a Dimmable LED Lighting System
DE202015103127U1 (de) * 2015-06-15 2016-09-19 Tridonic Gmbh & Co Kg LED-Modul mit veränderbarem Farbort und Beleuchtungsgerät mit einem solchen LED-Modul
EP3541148A1 (fr) * 2018-03-14 2019-09-18 Siteco Beleuchtungstechnik GmbH Lampe paramétrable avec un module de del et un module de mémoire à fonction de communication en champ proche
US20200120770A1 (en) * 2018-10-16 2020-04-16 Cree, Inc. Solid state luminaire with field-configurable cct and/or luminosity

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Publication number Publication date
DE102020111580A1 (de) 2021-10-28

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