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EP2772120B1 - Atténuation de moyens d'éclairage par modulation d'impulsions en largeur pwm - Google Patents

Atténuation de moyens d'éclairage par modulation d'impulsions en largeur pwm Download PDF

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Publication number
EP2772120B1
EP2772120B1 EP12810032.8A EP12810032A EP2772120B1 EP 2772120 B1 EP2772120 B1 EP 2772120B1 EP 12810032 A EP12810032 A EP 12810032A EP 2772120 B1 EP2772120 B1 EP 2772120B1
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European Patent Office
Prior art keywords
pulse
width
light
brightness
duty cycle
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EP12810032.8A
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German (de)
English (en)
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EP2772120A1 (fr
Inventor
Eduardo Pereira
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Tridonic GmbH and Co KG
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Tridonic GmbH and Co KG
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Publication of EP2772120A1 publication Critical patent/EP2772120A1/fr
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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
    • 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
    • H05B45/37—Converter circuits

Definitions

  • the invention relates to a method for controlling an electrical load, preferably for dimming a light source, by supplying the consumer with a series of pulses whose pulse width is variable, for example, in discrete steps.
  • the invention also relates to a method for adjusting a color location.
  • DALI Digital Addressable Lighting Interface
  • digital control signals are transmitted by the control unit, which are converted on the receiver side into discrete analogue dimming values and then processed into a pulse sequence whose pulses are then pulse width modulated in accordance with the discrete analogue dimming values.
  • microprocessors For the conversion of the digital control signals first into discrete analogue dimming values and then into pulse width modulated pulses, microprocessors are used which, for reasons of price, usually only operate at a rate of 10 to 12 bits. The problem may arise that the corresponding required color value can not be set by the existing hardware stable and without side effects such as noise generation.
  • the invention is based on the object to improve a method for dimming or controlling an electrical load.
  • the invention has for its object to propose a stable setting of a required color value or brightness value, so as to prevent side effects such as noise generation.
  • a method for dimming at least one luminous means such as LED or OLED, which is operated with a pulse width modulated current.
  • the duty cycle and / or the amplitude of the pulse width modulated current is / are adjustable depending on a desired color intensity or brightness of the light source.
  • At least one pulse of the pulse width modulated current is omitted or omitted.
  • pulses are selectively merged.
  • the at least one pulse can be omitted in such a way that the lighting means is a current that is constantly controlled or regulated on a time average to reach the current desired color intensity or brightness is provided.
  • the at least one pulse may be omitted such that the desired color intensity or brightness of the illuminant is achieved and at the same time the duty cycle or the amplitude of the pulse width modulated current remains greater than a minimum value, the minimum value for the duty cycle preferably half of the maximum possible Duty cycle is.
  • a duty cycle or amplitude designed / designed to achieve the desired color intensity or brightness of the light source is determined. If the determined duty cycle or amplitude is less than a minimum value, the desired color intensity or brightness of the light source is achieved such that the duty cycle or the amplitude is increased at least to the minimum value and at least one pulse of the pulse width modulated current is omitted.
  • the pulse-width-modulated current may have pulses periodically.
  • at least one pulse of the pulse width modulated current can be omitted.
  • the dimming ranges can be definable by the dimming preset value with respect to the desired color intensity or brightness of the luminous means.
  • the dimming default values may be greater in the first dimming range than in the second dimming range.
  • pulses of different pulse-width-modulated currents for respective groups of lamps are offset in time or not at the same time.
  • a pulse of one of the different pulse width modulated currents is omitted, a pulse of the other pulse width modulated currents can be omitted at the same time, wherein preferably then the duty cycle of all pulse width modulated currents is increased. Indeed, if different sets of lamps are controlled by different pulse width modulated currents, it may indeed happen that not all pulse width modulated currents would fall below the minimum duty cycle value. Nevertheless, a pulse can be omitted at the same time in all pulse width modulated currents.
  • Every nth pulse can be omitted.
  • the duty cycle or the amplitude of the pulse-width-modulated current can preferably be increased by the factor n / (n-1).
  • the duty cycle or the amplitude can be increased to a minimum value.
  • pulses of the pulse width modulated current corresponding to the color intensity or brightness can be omitted.
  • At least one pulse is periodically omitted. In two successive periods, this at least one pulse is omitted at the same time or preferably at random or quasi-randomly determined different times.
  • the pulse width modulated current can be generated by a supply unit controlled by a corresponding pulse width modulated control signal such that the pulse width modulated control signal defines the pulse sequence of the pulse width modulated current.
  • the frequency of the pulse-width-modulated current may preferably be selected to be so high that, due to the omission of pulses, any flickering of the brightness of the light emitted by the illuminant is no longer perceived by the inertia of the human eye.
  • the frequency of the pulse width modulated current may preferably be chosen higher than 200 Hz.
  • the dimming default value can be digital.
  • a method for setting a color location or a color intensity in a dimming control of an electrical load, preferably a light source, such as, for example, LED or OLED.
  • the luminous means has at least one, preferably two independently controllable, in their color rendering or in their color spectrum different illuminant groups.
  • the luminous means is driven with PWM signals having a duty cycle that is preferably settable in discrete steps.
  • PWM signals having a duty cycle that is preferably settable in discrete steps.
  • a plurality of successive PWM signals can be combined. Thus, instead of the sequence of PWM signals only a combined PWM signal is generated, to which then one or more subsequent PWM signals are omitted accordingly.
  • the PWM signals may be the aforementioned pulse width modulated current or the aforementioned pulse width modulated control signal or a pulse of the aforementioned pulse width modulated current or the aforementioned pulse width modulated control signal.
  • an integrated circuit in particular ASIC, microprocessor or hybrid thereof, which circuit is designed to carry out such a method.
  • a dimmable operating device for lighting means in particular LEDS or OLEDs, comprising such a circuit.
  • a lighting module comprising lighting means, in particular LEDs or OLEDs, and such a control gear.
  • a method for dimming control of an electrical load preferably a light source, such as, for example, LED or OLED.
  • This aspect relates to a method for adjusting a color locus in a dimming control of an electrical load, preferably a light source, such as LED or OLED, wherein the light source has at least two independently controllable light source groups, which differ in their color reproduction or in their color spectrum, wherein, in order to achieve a dimming preset value for a color locus to be set, the luminous means is driven with PWM signals with a duty cycle which can be set in discrete steps, wherein a plurality of successive PWM signals can be combined to set the color locus for at least one light source group and thus instead of the sequence of PWM signals only a combined PWM signal is generated, to which then one or more subsequent PWM signals are omitted accordingly.
  • a summed PWM signal can be generated when the pulse width of a PWM signal is less than half the maximum possible pulse width of a PWM signal.
  • the combined PWM signals can be output offset from one another, so that a combined PWM signal for one light-emitting means group is generated at the same time for a combined PWM signal for a further light-emitting means group.
  • the position of the combined PWM signals or the PWM pulses within the group can be changed periodically or randomly, for example in order to reduce resonances.
  • the dimming preset value can be digital. This can be resolved over a dimming range into a higher number of steps than the number of steps provided for the change of the duty cycle.
  • the frequency of the PWM pulses or of the pulse sequence can be selected to be so high that a flickering of the brightness of the light emitted by the light source due to the generation of the combined PWM signals is no longer perceived by the inertia of the human eye.
  • the frequency of the PWM pulses can be selected, for example, higher than 200 Hz.
  • the invention also relates to an integrated circuit, in particular ASIC, microprocessor or hybrid thereof, which circuit is designed for carrying out a method of the above-mentioned type.
  • a further aspect relates to a dimmable operating device for lamps, in particular LEDS or OLEDs, comprising such an integrated circuit.
  • the invention also relates to a lighting module, comprising lighting means, in particular LEDs or OLEDs, and a control gear.
  • the invention also proposes a lighting system, comprising at least one lighting module, which is connected via a signal line to a central unit, which is designed for the transmission of dimming specifications, in particular according to the DALI standard.
  • the method according to the invention also has the advantage that a change in color or color locus can be relatively slow and continuous.
  • FIG. 1 illustrated known generation of a PWM pulse train for adjusting the color location on the basis of the radiated light from a lamp by changing the pulse width of the pulses of the pulse train and thus of the duty cycle.
  • a central digital control signals generated (or otherwise generates control signals) from which by means of a microprocessor provided on the receiving side, a pulse train for control with pulse width-modulated pulses, which ultimately serve to adjust the brightness of the light emitted by the light source.
  • the change in the duty cycle of the PWM pulses is carried out according to the resolution of the microprocessor in discrete steps.
  • the resolution for example, between 10 and 14 bits may be less than the resolution of the dimming preset value, if this is digital or analog (quasi infinitely fine resolution).
  • FIG. 1 shows an example of the setting of the duty cycle of the pulse train or the PMW setting of three different groups of bulbs, here for the colors red, green and blue. In this way, any color can be set in RGB space.
  • the pulse width is set accordingly for each of the lighting groups. In this prior art method, however, the problem may arise that too narrow pulse widths can not be generated stably or produce, for example, perceptible noise.
  • FIG. 2 is a section of a pulse train according to the invention with a pulse repetition frequency of eg 100 Hz (1 / T) shown.
  • a method for adjusting a color locus in a dimming control of an electrical load allows, wherein the light source has at least two independently controllable lighting groups, which differ in their color reproduction or in their color spectrum.
  • the luminous means is driven with PWM signals with a duty cycle which can be set in discrete steps.
  • a plurality of successive PWM signals can be combined for at least one group of lamps and thus instead of the sequence of PWM signals only a combined PWM signal is generated, to which then one or more subsequent PWM signals are omitted.
  • the individual lamp groups can be driven by a respective driver circuit, wherein preferably a common control circuit can influence or regulate the control of the individual lamp groups.
  • a combined PWM signal is preferably generated when the pulse width of a PWM signal is less than a predetermined minimum proportion of the possible pulse width of a PWM signal, for example half the maximum possible pulse width of a PWM signal.
  • the combined PWM signals can be output offset from one another, so that at the same time a omitted PWM signal for a Illuminant group a summarized PWM signal for another group of lamps is generated.
  • the position of the combined PWM signals can be changed periodically or randomly within the group.
  • the dimming default value can be digital.
  • the pulse repetition frequency can be selected to be high enough so that a flickering of the brightness of the light emitted by the light source due to the generation of the combined PWM signals is no longer perceived by the inertia of the human eye.
  • the frequency of the PWM pulses can also be selected higher than 200 Hz.
  • the existing hardware for driving bulbs for a color mixture can be optimally utilized and existing limitations can thus be overcome.
  • the variation of the pulse width does not always have to be in the direction of larger values, but can also be done in the other direction.
  • FIG. 3 shows an embodiment of a schematic block diagram for an inventive operating device 1 for operating LEDs 6 and LED modules 14, 15, 16.
  • the operating device 1 is part of a lighting system 10 and comprises a control unit 2, a first driver circuit 3, a second driver circuit 4, a third driver circuit 5, and a DC power source 7.
  • the operating device 1 has two inputs, namely a first input 8 for the power supply via the power supply line 9 and a second input 11 for receiving data.
  • the DC power source 7 is supplied via the first input 8 from the AC mains with AC voltage. At its output, the DC power source 7 provides a constant DC current I0 available.
  • the DC power source 7 may preferably include a rectifier for rectifying the mains voltage, a voltage converter for lowering the rectified mains voltage, and a converter for generating the direct current I0.
  • the DC power source 7 can be controlled by the control unit 2 such that the DC current I0 generated by the DC power source 7 is e.g. is adjustable depending on dimming default values.
  • the data received via input 11 is e.g. Dimming default values, i. Control signals for controlling the brightness of the connected LEDs 6. These data are preferably transmitted over a bus 12 e.g. sent from a central processing unit 13.
  • An example of such a bus 12 is a DALI (Digital Addressable Lighting Interface) bus for implementing the DALI protocol for controlling lighting equipment.
  • the data can thus be in digital form via the bus 12 are transmitted.
  • the control unit 2 of the operating device 1 is connected to the bus 12, so that the brightness of the LEDs 6 and the LED modules 14, 15, 16, for example. Centrally controlled by the central processing unit 13.
  • the control unit 2 of the operating device 1 utilizes the data or dimming specifications received via the second input 11 and accordingly controls the LEDs 6 or the LED modules 14, 15, 16.
  • the supply of the LED modules 14, 15, 16 takes place via a respective driver circuit in which a first driver circuit 3, the first LED module 14, a second driver circuit 4, the second LED module 15, and a third driver circuit 5, the third LED module 16 with power.
  • the operating device 1 can thus control several LED modules independently of each other.
  • one or more of the LED modules may be an LED array of blue LEDs that emit white light using a color conversion agent. It is also possible that each LED module drives a different LED color. It is also e.g. It is conceivable that one module activates red LEDs, one module green LEDs and one module blue LEDs in order to achieve every desired point in the RGB color space.
  • one, two or more than three LED modules can be controlled.
  • several LED modules can be powered by a common driver circuit.
  • the present invention relates to LED modules 14, 15, 16 that emit white light, wherein the characteristic, i. in particular, the color temperature within the Planck's white light curve is changeable.
  • the invention further relates in particular to the use of LED modules which have a blue-emitting LED, a red-emitting LED and a dye-converted LED (blue LED with dye in the yellow / green region).
  • the invention is not limited to such combinations of colored LEDs, but rather the invention may relate to an LED module having at least two LEDs having different color emission spectra.
  • the two emission spectra can preferably be combined so that at least two different color coordinates in the region of the Planck's white light curve can be set.
  • the driver circuit 3, 4, 5 is a circuit known per se, which generates a pulse-width-modulated current i3, i4, i5 on the basis of the constant direct current I0.
  • the driver circuit 3, 4, 5 comprises at least one switch (not shown) which can be controlled by a control signal PWM3, PWM4, PWM5 such that a desired pulse-width-modulated current i3, i4, i5 operates the LEDs at the output.
  • the control signal is preferably a pulse width modulated (PWM) control signal generated by the control unit 2.
  • PWM pulse width modulated
  • the brightness of the LEDs 6 can be controlled in a known manner via the amplitude of the current i3, i4, i5 and / or via the duty cycle of the control signal PWM3, PWM4, PWM5.
  • FIG. 4 shows an embodiment of the course of the control signals PWM3, PWM4, PWM5, so that the illumination system 10, a color temperature of 2700 Kelvin can be achieved.
  • the control signals PWM3, PWM4, PWM5 control driver circuits 3, 4, 5 for respectively supplying an LED module 14 with red emitting LEDs, an LED module 15 with dye converted LEDs such as blue LEDs with yellow / green dye, and an LED Module 16 with blue emitting LEDs.
  • each LED module 14, 15, 16 is dimmed in accordance with the pending control command or the upcoming dimming default up to the possible with the PWM hardware limit with respect to the duty cycle. Now, if the total light output is to be dimmed further, the duty cycle for the LED module concerned is not further reduced. Rather, turn-on pulses are completely omitted, and therefore increases the duty cycle in the remaining pulses.
  • FIG. 5 a known periodic PWM control signal 50 is shown in which the dimming default values to a Fall below a predetermined minimum value TL for the duty cycle should result.
  • This value TL is preferably defined by the fact that above this value, the duty cycle can be kept stable.
  • the duty cycle T5setpoint of a periodic control signal which has a pulse in each period T0, is first calculated in accordance with the dimming setpoint values.
  • This theoretical PWM signal is in FIG. 5 shown in dashed lines.
  • the minimum duty cycle value TL is undershot.
  • the control unit 2 is then designed to increase the duty ratio at least to the value TL, but to omit individual pulses, so that in the time averaging the same overall brightness is achieved as in FIG. 5 illustrated periodic control signal PWM5 with duty cycle T5soll.
  • FIG. 6 For example, an embodiment for a control signal 60 according to the present invention is shown in which the pulse has been widened in the first period [0, T0].
  • the duty cycle is tripled to a value higher than the minimum value TL, for example.
  • the pulses in the following two periods [T0, 2T0] and [2T0, 3T0] are not generated and completely omitted.
  • Over the time period TW results compared to in Fig. 5 shown known control signal 50, the same brightness of the LED module.
  • every nth electrical switching pulse for the respective LED module is completely omitted, and instead the duty cycle for this LED module in the remaining pulses multiplied by n / (n-1). What matters is that the new value for the duty cycle is higher than the minimum value TL.
  • n 3. Every third switch-on pulse of the control signal 71 according to the invention is completely omitted.
  • control signal 72 is constructed.
  • the third pulse is skipped between 2T0 and 3T0, whereas in the following period TW2 it is the second pulse between 4T0 and 5T0.
  • the omission of pulses can be carried out according to the invention, either only for each standing on the PWM boundary TL PWM signal.
  • the human eye will not be able to resolve the resulting color changes or variations in color temporally.
  • the frequency is thus preferable for the frequency to be still above the temporal resolution of the human eye, even if the pulses for all or only one selected color channel are omitted. for example, above 60 to 65 Hz, preferably above 80 Hz, preferably above 100 Hz.
  • this dimming method can be combined as desired with other dimming methods, in particular with a continuous or stepwise variation of the current amplitude by the respective driver circuit 3, 4, 5.
  • Both amplitude modulation and PWM are performed in the upper dimming range.
  • Upon reaching the lower limit for current and / or duty cycle can be switched to the inventive selective omission of pulses.
  • the invention can also be applied, for example, to pure amplitude dimming, for example in the upper dimming range.
  • the amplitude dimming may be stably performed up to a lower predetermined value AL.
  • the amplitude A0 for the matching current 80 for the LED module is calculated.
  • the lower limit AL for the possible reduction of current for an LED module can be switched to the above-mentioned selective omission of pulses or collapse of pulses.
  • the pulse between 2T0 and 3T0 is omitted, so that the resulting brightness of the LED module can be reduced according to the dimming specifications, but at the same time the minimum amplitude AL is not exceeded.
  • the color locus remains averaged over time in terms of the resolving power of the human eye, i. at a frequency of, for example, 100 hertz - constant.
  • the method according to the invention can also be used for dimming a single LED module or for generating a single pulse-modulated current.
  • the invention then contributes to the fact that preferably at low dimming values, the brightness of the LED module can be kept stable.
  • An advantage of the invention is that the resulting color intensity of a single LED module or the entire illumination system 10 is kept stable.

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  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Electroluminescent Light Sources (AREA)

Claims (13)

  1. Procédé de variation d'au moins un moyen d'éclairage (6), par exemple d'une ou plusieurs LED ou OLED, ce moyen d'éclairage étant contrôlé avec un courant modulé en largeur d'impulsion (i3, i4, i5),
    dans lequel le rapport cyclique et/ou l'amplitude du courant modulé en largeur d'impulsion (i3, i4, i5) peut être réglé en fonction d'une intensité de couleur ou d'une luminosité souhaitée du moyen d'éclairage (6), au moins une impulsion du train d'impulsions du courant modulé en largeur d'impulsion étant omise ou évitée de manière ciblée pour le réglage de l'intensité de couleur ou de la luminosité du moyen d'éclairage (6) et
    dans lequel un rapport cyclique et/ou une amplitude conçu(e) pour atteindre l'intensité de couleur ou la luminosité du moyen d'éclairage (6) est déterminé(e), caractérisé en ce que, si le rapport cyclique et/ou l'amplitude déterminé(e) est inférieur(e) à une valeur minimale, l'intensité ou la luminosité souhaitée du moyen d'éclairage (6) est obtenue grâce au fait que le rapport cyclique et/ou l'amplitude est augmentée au moins à la valeur minimale et au moins une impulsion du courant modulé en largeur d'impulsion est omise.
  2. Procédé selon la revendication 1,
    l'au moins une impulsion est omise de façon à ce qu'un courant contrôlé ou régulé de manière constante en moyenne temporelle soit mis à la disposition du moyen d'éclairage (6) afin d'obtenir l'intensité de couleur ou la luminosité souhaitée.
  3. Procédé selon l'une des revendications précédentes,
    l'au moins une impulsion étant omise de façon à ce que l'intensité de couleur ou la luminosité souhaitée du moyen d'éclairage (6) soit obtenue et en même temps que le rapport cyclique du courant modulé en largeur d'impulsion soit augmenté.
  4. Procédé selon l'une des revendications précédentes,
    dans lequel, dans une première plage de variation, le courant modulé en largeur d'impulsion (i3, i4, i5) comprend, périodiquement avec une première période (T0) des impulsions et
    dans une deuxième plage de variation, au moins une impulsion du courant modulé en largeur d'impulsion est omise.
  5. Procédé selon l'une des revendications précédentes,
    les plages de variation pouvant être définies par une directive de variation concernant l'intensité de couleur ou la luminosité souhaitée du moyen d'éclairage (6) et les valeurs de consigne de variation dans la première plage de variation étant plus grandes que dans la deuxième plage de variation.
  6. Procédé selon l'une des revendications précédentes,
    au moins deux groupes de moyens d'éclairage (14, 15, 16), se distinguant de préférence en ce qui concerne leur rendu des couleurs et leur spectre de couleurs, peuvent être contrôlés indépendamment entre eux au moyen d'un courant modulé en largeur d'impulsion (i3, i4, i5) correspondant.
  7. Procédé selon la revendication 6,
    des impulsions de différents courants modulés en largeurs d'impulsions (i3, i4, i5) pour des groupes de moyens d'éclairage (14, 15, 16) correspondants sont décalées dans le temps ou ne sont pas omises en même temps.
  8. Procédé selon la revendication 7,
    moyennant quoi, lorsqu'une impulsion d'un des différents courants modulés en largeurs d'impulsions (i3, i4, i5) est omise, une impulsion des autres courants modulés en largeurs d'impulsions (i3, i4, i5) est simultanément omise, de préférence le rapport cyclique et/ou l'amplitude de tous les courants modulés en largeurs d'impulsions (i3, i4, i5) étant augmentés.
  9. Procédé selon l'une des revendications précédentes,
    une impulsion sur n étant omise, le rapport cyclique et/ou l'amplitude du courant modulé en largeur d'impulsion (i3, i4, i5) étant de préférence augmenté du facteur n/(n-1) pour le réglage de l'intensité de couleur ou de la luminosité.
  10. Procédé selon l'une des revendications 1 à 8,
    le rapport cyclique et/ou l'amplitude étant augmentée à une valeur minimale, des impulsions du courant modulé en largeur d'impulsion (i3, i4, i5) étant omises pour le réglage de l'intensité de couleur ou de la luminosité.
  11. Procédé selon l'une des revendications précédentes,
    dans lequel au moins une impulsion est omise périodiquement avec une deuxième période (Tw),
    cette au moins impulsion étant omise, dans deux périodes (Tw) successives, au même moment ou de préférence à des moments différents déterminés de manière aléatoire ou quasi-aléatoire.
  12. Procédé selon l'une des revendications précédentes,
    le courant modulé en largeur d'impulsion (i3, i4, i5) étant généré par une unité d'alimentation (3, 4, 5) contrôlée par un signal de commande modulé en largeur d'impulsion (PWM3, PWM4, PWM5) correspondant, de façon à ce que le signal de commande modulé en largeur d'impulsion (PWM3, PWM4, PWM5) définisse la suite d'impulsions du courant modulé en largeur d'impulsion (i3, i4, i5).
  13. Procédé selon l'une des revendications précédentes,
    la fréquence du courant modulé en largeur d'impulsion (i3, i4, i5) étant choisi avec une valeur telle que, lors de l'omission d'impulsions, le vacillement éventuel de la luminosité de la lumière émise par le moyen d'éclairage (6) ne soit plus perçu du fait de l'inertie de l'oeil humain, la fréquence du courant modulé en largeur d'impulsion (i3, i4, i5) choisie étant de préférence supérieur à 200 Hz.
EP12810032.8A 2011-10-27 2012-10-29 Atténuation de moyens d'éclairage par modulation d'impulsions en largeur pwm Active EP2772120B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
ATGM585/2011U AT13736U1 (de) 2011-10-27 2011-10-27 Pwm-dimmen von leuchtmitteln
DE102012200657A DE102012200657A1 (de) 2011-10-27 2012-01-18 PWM-Dimmen von Leuchtmitteln
PCT/AT2012/000270 WO2013059849A1 (fr) 2011-10-27 2012-10-29 Atténuation de moyens d'éclairage par modulation d'impulsions en largeur pwm

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EP2772120A1 EP2772120A1 (fr) 2014-09-03
EP2772120B1 true EP2772120B1 (fr) 2019-01-09

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EP (1) EP2772120B1 (fr)
AT (1) AT13736U1 (fr)
DE (2) DE102012200657A1 (fr)
WO (1) WO2013059849A1 (fr)

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DE102013223711A1 (de) * 2013-11-20 2015-05-21 Osram Gmbh Steuern eines wenigstens zwei Halbleiterlichtquellen aufweisenden Leuchtmittels
DE102016107725B4 (de) * 2016-04-26 2023-09-28 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zum Ansteuern einer Mehrzahl von Leuchtmodulen eines Matrixscheinwerfers für ein Kraftfahrzeug
US11337289B2 (en) * 2017-08-23 2022-05-17 Signify Holding B.V. System and method for controlling output of a dynamic lighting scene by a group of lighting units
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EP2772120A1 (fr) 2014-09-03
WO2013059849A1 (fr) 2013-05-02
DE112012004478A5 (de) 2014-07-10
AT13736U1 (de) 2014-07-15
DE102012200657A1 (de) 2013-05-02

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