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EP4199651B1 - Procédé et agencement de système pour ajuster une longueur d'onde constante - Google Patents

Procédé et agencement de système pour ajuster une longueur d'onde constante Download PDF

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Publication number
EP4199651B1
EP4199651B1 EP23154753.0A EP23154753A EP4199651B1 EP 4199651 B1 EP4199651 B1 EP 4199651B1 EP 23154753 A EP23154753 A EP 23154753A EP 4199651 B1 EP4199651 B1 EP 4199651B1
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EP
European Patent Office
Prior art keywords
light
emitting diode
temperature
current value
wavelength
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Active
Application number
EP23154753.0A
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German (de)
English (en)
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EP4199651A1 (fr
Inventor
Stefan Hoffmann
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Inova Semiconductors GmbH
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Inova Semiconductors GmbH
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Publication of EP4199651A1 publication Critical patent/EP4199651A1/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
    • H05B45/24—Controlling the colour 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]
    • 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]
    • H05B45/20—Controlling the colour of the light
    • H05B45/28—Controlling the colour of the light using temperature feedback
    • 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
    • H05B45/32—Pulse-control circuits
    • H05B45/325—Pulse-width modulation [PWM]

Definitions

  • the present invention is directed to a method which, with little technical effort, makes it possible to set a constant wavelength in a light-emitting diode in such a way that a human observer with the naked eye sees a constant color of the light-emitting diode. Furthermore, the present invention is directed to a correspondingly configured system arrangement and to a computer program product with control commands which carry out the method or operate the system arrangement.
  • WO 2014/067830 A1 shows a method and arrangement for temperature-corrected control of LEDs using look-up tables.
  • a circuit is proposed for controlling several LED channels, each having at least one LED, and for generating a mixed light from the light generated by the respective LED channels, wherein a look-up table is provided for each target color location that can be reached by the LED module, in which the operating current for each LED channel is stored.
  • WO 2017/162 323 A1 shows an efficient control arrangement and a control method which make it possible to provide a particularly efficient data transmission, in particular for LED control units.
  • the publication is also directed to a corresponding protocol which causes control units to carry out the corresponding method steps.
  • WO 2017/162 324 A1 shows a method and a device for bidirectional communication between a command unit and a plurality of connected LED control units. This makes it possible to send control commands to several LED control units connected in series at high speed or to return execution results from these control units to a command unit.
  • WO 2017/153 026 A1 shows a method and a device for brightness compensation of a light-emitting diode, whereby a constant brightness the LED is achieved regardless of the temperature fluctuation.
  • PWM pulse width modulation
  • LEDs are used in many application scenarios where they are not supposed to be disadvantageous compared to incandescent lamps. While incandescent lamps can be easily dimmed in terms of brightness, there are known methods for LEDs which, for example, control these LEDs using a predetermined control pattern and thereby enable optical dimming. In contrast to this, however, it is often desired that a LED, for example, as the ambient temperature rises, the light must also be made brighter. This is the case because LEDs typically have a lighting behavior that reduces the emitted luminosity depending on the temperature value.
  • light-emitting diodes which are typically provided as red, green or blue-emitting light-emitting diodes, are susceptible to brightness or color fluctuations with respect to temperature development. According to the state of the art, it is therefore disadvantageous that the color variations depending on the temperature development or brightness variations can be so strong that they are visible to the human eye and thus result in undesirable optical effects. Such optical effects can relate to comfort functions, for example in a vehicle, whereby application scenarios also provide that the light-emitting diodes have a safety function. For example, light-emitting diodes are also used as optical warning signals and the disadvantage of brightness variation or color variation can be safety-critical.
  • a method for setting a constant wavelength of a light-emitting diode comprising controlling the light-emitting diode by means of a preset current value, measuring an actually prevailing temperature of a control unit arranged in the immediate vicinity of the controlled light-emitting diode, providing an empirically determined wavelength variation of the light-emitting diode depending on the temperature of the light-emitting diode and adjusting the preset current value depending on the actually prevailing temperature and the empirically determined wavelength variation for setting the constant wavelength of the light-emitting diode.
  • method steps can be carried out iteratively and/or in a different order.
  • method steps can have further sub-steps.
  • the LED is typically controlled iteratively and the prevailing temperature on the control unit is measured iteratively.
  • an empirically determined wavelength variation is provided in a preparatory method step.
  • the preset current value is adjusted at a specific rate or within preset intervals.
  • a light-emitting diode can be a red, green, blue or white light-emitting diode. It is known to combine these different individual light-emitting diodes into light-emitting diode units, so that, depending on the design, three or four individual light-emitting diodes form a light-emitting diode unit. In this case, further technical devices must be provided which, for example, control the individual light-emitting diodes in such a way that a wavelength or brightness is produced.
  • the proposed control units are used for this purpose, which indirectly apply a certain current to the LEDs or carry out pulse width modulation.
  • the brightness or luminosity of each individual LED is adjusted using pulse width modulation and the wavelength is then adjusted using the current value.
  • the proposed current value is therefore the current value by which the LED is controlled. This does not contradict the fact that During pulse width modulation, no current is supplied at least temporarily.
  • This provision of current takes place as part of controlling the LED using a preset current value.
  • This process step is also carried out according to the state of the art, with the disadvantage that the constant preset current value leads to a wavelength variation, which becomes apparent to the observer because the color of the LED changes. This occurs due to the changing temperature conditions within the LED.
  • the preset current value is typically stored in a memory unit of the LED unit or is provided by the control unit.
  • an actual prevailing temperature is measured by a control unit arranged in the immediate vicinity of the controlled LED.
  • a control unit arranged in the immediate vicinity of the controlled LED.
  • the control unit can be used for this purpose.
  • the invention therefore results in a design that makes it possible for the temperature to be measured at an alternative location and for the measuring sensor or temperature sensor to be arranged on the control unit. Since the temperature is not measured directly on the LED, but rather on the control unit, the proposed method takes this distance into account according to one aspect and varies the current value accordingly. Since the control unit is arranged in the immediate vicinity of the LED, a conclusion can be drawn about the temperature of the LED during operation.
  • immediate proximity is to be interpreted in such a way that the proximity is essentially immediate, such that only one layer, for example as described later, is arranged between the sensor and the control unit.
  • “immediate” is to be interpreted in such a way that no further active components are installed. Consequently, only passive components, such as connecting layers or heat-conducting layers, are arranged between the LED and the control unit.
  • the feature of "immediate” proximity is optional in that no further active, heat-generating units are arranged between the LED and the control unit.
  • the method step can also be carried out in such a way that a measurement of an actually prevailing temperature of a control unit arranged near the controlled LED is carried out. In particular, distances of less than one millimeter are also understood to be immediate.
  • An empirically determined wavelength variation of the LED is then provided as a function of the temperature of the LED. This is also referred to as providing a characteristic curve of the LED.
  • the empirically determined wavelength variation indicates the extent to which the wavelength of the LED changes with increasing or decreasing temperature. This is also referred to as the error rate of the LED and indicates a technically determined value that corresponds to a delta of the wavelength value that occurs when the temperature of the LED rises or falls. This empirical value can be stored in a data memory.
  • the preset current value is adjusted.
  • the process thus branches iteratively back to a first process step, which involves controlling the LED.
  • the LED is This is controlled in such a way that the constant wavelength or the essentially constant wavelength of the light-emitting diode is established.
  • the wavelength variation is compensated for by the temperature, and the current value is adjusted in such a way that the color value of the light-emitting diode is always constant.
  • the invention can take into account that the actual prevailing temperature is measured at the control unit and not at the LED and that the empirically determined wavelength variation provided relates to a temperature of the LED. It is therefore advantageous to calculate a compensation factor here that takes into account that the measurement is not actually taken directly at the LED but at the control unit provided. Consequently, the invention makes it possible to propose an alternative design and also to operate the method accordingly.
  • the LED is actually controlled using this adjusted current value as part of the adjustment of the preset current value. This ensures that the LED emits a constant wavelength over time and temperature development.
  • the method is carried out for a red, blue, green or white-emitting light-emitting diode.
  • This has the advantage that not only the colors can be adjusted using the proposed method, but the luminosity can also be adjusted using a white-emitting light-emitting diode, so that no separate method has to be used to compensate for the brightness.
  • the brightness of the light-emitting diode can therefore also be controlled with little technical effort.
  • the method is carried out iteratively in such a way that the preset current value is adjusted essentially every 2 seconds.
  • This has the advantage that the wavelength is always actually adjusted, but this requires little computing effort and the underlying components can then also be designed efficiently.
  • adjusting the current value every two seconds is so advantageous with regard to human perception that no significant error, i.e. a deviation of the actual wavelength from the target wavelength, occurs within such a time interval and thus only negligible error rates occur.
  • the human eye does not detect any deviation in the wavelength, i.e. perceives a constant wavelength overall. Only from a technical point of view can it be determined using aids that the wavelength varies within the 2 seconds, which is then adjusted promptly.
  • the invention thus creates a suitable balance between hardware effort and human perception.
  • the preset current value specifies a current pulse of a pulse width modulation. This has the advantage that the preset current value can be switched on and off as part of the pulse width modulation, so that the brightness can also be varied. Thus, when controlling the light-emitting diode using a preset current value, no current can be applied temporarily, thereby implementing the pulse width modulation.
  • the adjustment of the preset current value is carried out by means of a stored error function.
  • a function can be determined empirically can be determined, which multiplies or adds the inverse of the error with respect to the wavelength to the current strength, so that the resulting error, i.e. the deviation in the wavelength, is cancelled or compensated.
  • the error function thus determines a value by which the preset current value must be adjusted so that the initial wavelength is created again.
  • the error function provides a compensation value which compensates for the wavelength variation of the light-emitting diode.
  • the compensation value is present as a compensation factor and/or compensation summand.
  • This has the advantage that a compensation value can be multiplied and/or summed, whereby a combination of both options is also proposed according to the invention.
  • the current value can thus be adjusted at any time in such a way that the desired constant wavelength is established or the error in the deviation of the wavelength is compensated.
  • the error function determines the temperature of the LED depending on the actual prevailing temperature of the control unit.
  • This has the advantage that the temperature value does not have to be taken directly from the LED, but rather the temperature of the control unit is measured according to the invention and then the temperature of the LED is deduced.
  • an alternative design can be achieved and Experience can be used to determine which temperature values prevail on the LED at which temperature of the control unit.
  • conclusions can be drawn about the wavelength based on the temperature, which in turn allows the current value to be adjusted so that the desired wavelength is achieved. This is because, for technical reasons, the wavelength varies with the prevailing temperature.
  • the preset current value is adjusted when an actual wavelength deviates from the target wavelength by more than a threshold value.
  • a threshold value can be defined that corresponds, for example, to the accuracy of the naked human eye. If this threshold value is undershot or exceeded, the current value is adjusted and the underlying hardware components can be designed particularly efficiently. This is the case because not every deviation has to be compensated immediately, but rather the threshold value can be chosen to be so large that the variation is not visible to the human eye. In this respect, the threshold value can also take the underlying hardware into account, and this in turn can be designed efficiently.
  • the empirically determined wavelength variation specifies a characteristic curve of the light-emitting diode.
  • a characteristic curve describes characteristics of the light-emitting diode, and thus a wavelength variation depending on the temperature can also be provided, which is then corrected according to the invention.
  • the immediate proximity is less than 1 mm.
  • the underlying unit is chosen to be so small that it can actually still be said to be in immediate proximity, but according to the invention it has been found that larger deviations are complex to calculate.
  • a proximity of less than 1 mm does not typically lead to a large distortion in terms of temperature, and the temperature of the control unit can be used as the basis for the method according to the invention, instead of the temperature of the light-emitting diode.
  • the immediate proximity is set by means of a thickness of an adhesive layer, a silicone layer, a polymer layer, a heat-conducting layer, an aluminum layer and/or a copper layer.
  • An air gap or casting resins can also be used for this purpose.
  • This has the advantage that the distance between the LED and the control unit or alternatively the distance between the sensor and the control unit is set in such a way that at least one of the layers listed is used.
  • This is generally an immediate proximity, since no electronic components are arranged between the proposed nominal units and thus no new heat source is created.
  • immediate proximity is spoken of despite an introduced layer.
  • the current value is adjusted taking such a layer into account and thus compensates for the fact that according to the invention the prevailing temperature is measured at the control unit and not at the LED.
  • control unit is provided as a controller, a controller chip, a logic circuit, a logic gate or a microcontroller.
  • This has the advantage that efficient Computing units are used as control units which control the light-emitting diode or light-emitting diodes.
  • the light-emitting diode can be controlled using pulse width modulation, and in particular, according to the invention, the light-emitting diode is controlled using a preset current value which can be regulated, for example, by the control unit.
  • a system arrangement for setting a constant wavelength of a light-emitting diode comprising a control unit set up to control the light-emitting diode by means of a preset current value, at least one measuring sensor set up to measure an actually prevailing temperature of the control unit arranged in the immediate vicinity of the controlled light-emitting diode, an interface unit set up to provide an empirically determined wavelength variation of the light-emitting diode depending on the temperature of the light-emitting diode and a compensation interface set up to adapt the preset current value depending on the actually prevailing temperature and the empirically determined wavelength variation for setting the constant wavelength of the light-emitting diode.
  • the problem is also solved by a computer program product with control commands which execute the proposed method or operate the proposed system arrangement.
  • the method is set up to operate the proposed system arrangement and the system arrangement is set up to carry out the proposed method.
  • the method thus comprises method steps which can be functionally reproduced based on the structural features of the system arrangement.
  • the system arrangement comprises functional components which create a function in accordance with the proposed method steps.
  • the computer program product serves both to carry out the method steps and to operate the system arrangement.
  • Fig. 1 shows a diagram on the left, where the x-axis shows the temperature of the LED and the y-axis shows the resulting wavelength emitted by the LED.
  • a constant wavelength is required, but this varies disadvantageously with temperature.
  • the wavelength increases with increasing temperature, which leads to the viewer perceiving a color variation that is so is not desired.
  • An analogous example is shown on the right for a specific value.
  • the present invention has the task of compensating for this variation in wavelength.
  • Fig. 2 shows in the left diagram a current that is plotted on the x-axis and a wavelength that is plotted on the y-axis.
  • the wavelength varies depending on the current provided and thus the wavelength decreases with increasing current.
  • a characteristic curve development is also shown on the right-hand side, with the wavelength again plotted on the y-axis and the current on the x-axis.
  • the disadvantages that the wavelength varies based on temperature developments are overcome, whereby in this case it is exploited that the wavelength can also be changed based on the current or current value provided.
  • Fig. 3 shows an aspect of the present invention, namely that it is possible to determine at which temperature which wavelength prevails and to calculate how a corresponding error function is to be designed. For example, temperatures of 20 °C and 110 °C are taken into account.
  • both diagrams are combined with one another, and the current value is increased as the temperature increases.
  • the wavelength therefore increases with the temperature, which is compensated according to the invention in that the error function increases the set current value in such a way that the increase on the left side results in a reduction in the wavelength according to the right side.
  • a constant wavelength, which is created according to the invention, is then superimposed on both curves.
  • the current value is adjusted depending on the prevailing temperature or the wavelength variation.
  • This method can be carried out iteratively in such a way that the diagrams are created for each of the light-emitting diodes, i.e. the red, green, blue and white light-emitting diodes.
  • Fig. 4 shows the proposed system arrangement, with a temperature sensor arranged at the top left, which measures the temperature on the control unit or in the immediate vicinity of the LED and then transmits the measured value in analog form to an analog-digital converter.
  • This component then provides the digital measured value to the error function component.
  • On the left side there is a so-called one-time programmable component, i.e. a non-volatile memory, also known as OTP for short.
  • the error function component then sends the value to be set to a digital-analog converter, which then addresses the LED.
  • Fig. 5 shows in a schematic flow diagram the proposed method for setting a constant wavelength of a light-emitting diode, comprising controlling 100 the light-emitting diode by means of a preset current value, measuring 101 an actually prevailing temperature of a light-emitting diode arranged in the immediate vicinity of the controlled 100 Control unit, providing 102 an empirically determined wavelength variation of the light-emitting diode as a function of the temperature of the light-emitting diode and adjusting 103 the preset current value as a function of the actually prevailing temperature and the empirically determined wavelength variation for setting 104 the constant wavelength of the light-emitting diode.
  • At least one sensor is provided for measuring the temperature value at at least one measuring location.
  • Several measuring locations are suitable for this, for example a measuring location at exactly one LED, a measuring location at each LED, a measuring location at a microcontroller that is connected to an LED, or a measuring location in the immediate vicinity of an LED.
  • the proposed method is used with several connected LEDs. In this case, it is possible for several LEDs to be connected in series, for example. If this plurality of LEDs is installed in an automobile, different temperatures may prevail at different locations.
  • the LEDs can not only heat up on their own initiative, but temperature can also be emitted by adjacent components. According to the invention, it is therefore possible to take this into account and to determine a temperature value at several measuring locations.
  • An immediate environment here describes an environment that allows a conclusion to be drawn about the temperature of the LED. This means that this temperature does not have to be determined directly on the LED, but a temperature sensor can be spaced away from the LED in such a way that temperature input from neighboring components is negligible. In particular, this means that there does not have to be any physical contact in the sense of touching the temperature sensor and the LED.
  • the light-emitting diode is present as a triplet of three light-emitting diode units and the light-emitting diode units each emit a different color.
  • Individual LEDs are also possible according to the invention. This has the advantage that colored LEDs can be used. In particular, it is possible according to the invention to continue using conventional LEDs and only to control the current regulator of these LEDs in such a way that the advantage according to the invention is achieved.
  • the proposed method also has the advantage that the brightness compensation can take place independently of the color setting of the light-emitting diode.
  • a light-emitting diode unit is present as a semiconductor component or as any light-emitting component. Emitting different colors, or light in different wavelengths, serves to set a predetermined color value.
  • a memory module provides a plurality of temperature values, each of which is assigned a current value. This has the advantage that a large number of temperature values can be taken into account and the temperature values can be predetermined with respect to the current values in such a way that the same brightness value of the light-emitting diode is always set. In particular, the number of current value/temperature value pairs can be determined in a preparatory method step.
  • the memory module or the saving of the current values must be interpreted in such a way that any type of memory module or saving is possible.
  • the memory module does not have to be set up dynamically in such a way that it can be written to during a runtime, i.e. while the current controller is being controlled. Rather, saving simply requires the corresponding information to be incorporated into a hardware module in some way. It may also be necessary not to provide a single memory module, but to provide additional components that enable the current value to be provided.
  • a light-emitting diode is to be understood as a device which can also have further LED chips.
  • the light-emitting diodes according to the invention in turn consist of further light-emitting diode units or semiconductor chips.
  • the known red, green and blue light-emitting diode units can be used for this, which are set with respect to the so-called RGB color space.
  • These individual light-emitting diode units are combined in a light-emitting diode housing in such a way that their light is composed to a predetermined color value. For example, it is possible to set a mixing ratio in such a way that the light-emitting diode emits a white light overall.
  • any color light can also be set by appropriately controlling the individual components. This means that color transitions can also be generated, for example.
  • the so-called multi-LED components can be used, for example.

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Claims (13)

  1. Procédé de réglage d'une longueur d'onde constante d'une diode électroluminescente, comprenant :
    - commander (100) la diode électroluminescente au moyen d'une valeur de courant préréglée ;
    - mesure (101) d'une température prévalant réellement d'une unité de commande disposée à proximité immédiate de la diode électroluminescente commandée (100), caractérisée exclusivement par : des composants sont disposés entre la diode électroluminescente et l'unité de commande
    - fournir (102) une variation de longueur d'onde de la diode électroluminescente déterminée empiriquement en fonction d'une température de la diode électroluminescente ; et
    - l'adaptation (103) de la valeur de courant préréglée en fonction de la température qui prévaut réellement et de la variation de longueur d'onde déterminée empiriquement pour ajuster (104) la longueur d'onde constante de la diode électroluminescente, l'adaptation (103) de la valeur de courant préréglée étant effectuée au moyen d'une fonction d'erreur mémorisée et la fonction d'erreur déterminant la température de la diode électroluminescente en fonction de la température qui prévaut réellement dans l'unité de commande.
  2. Procédé selon la revendication 1, dans lequel le procédé est mis en oeuvre respectivement pour une diode électroluminescente émettant du rouge, du bleu, du vert ou du blanc.
  3. Procédé selon la revendication 1 ou 2, dans lequel le procédé est exécuté de manière itérative de telle sorte que l'ajustement (103) de la valeur de courant préréglée est effectué sensiblement toutes les deux secondes.
  4. Procédé selon l'une quelconque des revendications précédentes, dans lequel la valeur de courant préréglée spécifie une impulsion de courant d'une modulation de largeur d'impulsion.
  5. Procédé selon la revendication 1, dans lequel la fonction d'erreur fournit une valeur de compensation qui compense la variation de longueur d'onde de la diode électroluminescente.
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel la valeur de compensation se présente sous la forme d'un facteur de compensation et/ou d'un mandant de compensation.
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'ajustement (103) de la valeur de courant préréglée est effectué lorsqu'une longueur d'onde réelle s'écarte de la longueur d'onde cible de plus d'une valeur de seuil.
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel la variation de longueur d'onde déterminée empiriquement spécifie une caractéristique de la diode électroluminescente.
  9. Procédé selon l'une quelconque des revendications précédentes, dans lequel la proximité immédiate est inférieure à un millimètre.
  10. Procédé selon l'une quelconque des revendications précédentes, dans lequel la proximité immédiate est ajustée au moyen d'une épaisseur d'une couche adhésive, d'une couche de silicone, d'une couche de polymère, d'une couche de conduction thermique, d'une couche d'aluminium et/ou d'une couche de cuivre.
  11. Procédé selon l'une quelconque des revendications précédentes, dans lequel l'unité de commande est fournie sous la forme d'un contrôleur, d'une puce de contrôleur, d'un circuit logique, d'une porte logique ou d'un micro-contrôleur.
  12. Agencement de système pour ajuster une longueur d'onde constante d'une diode électroluminescente, comprenant :
    - une unité de commande agencée pour commander (100) la diode électroluminescente au moyen d'une valeur de courant préréglée ;
    - au moins un capteur de mesure est conçu pour mesurer (101) une température qui prévaut réellement de l'unité de commande disposée à proximité immédiate de la diode électroluminescente commandée (100), caractérisé exclusivement par : des composants sont disposés entre la diode électroluminescente et l'unité de commande ;
    - une unité d'interface agencée pour fournir (102) une variation de longueur d'onde de la diode électroluminescente déterminée empiriquement en fonction d'une température de la diode électroluminescente ; et
    - une interface de compensation aménagée pour adapter (103) la valeur de courant préréglée en fonction de la température qui prévaut effectivement et de la variation de longueur d'onde déterminée empiriquement pour régler (104) la longueur d'onde constante de la diode électroluminescente, l'adaptation (103) de la valeur de courant préréglée pouvant être réalisée au moyen d'une fonction d'erreur mémorisée et la fonction d'erreur déterminant la température de la diode électroluminescente en fonction de la température qui prévaut effectivement dans l'unité de commande.
  13. Produit de programme d'ordinateur comprenant des instructions de commande qui font que le dispositif de la revendication 12 exécute les étapes de procédé selon l'une quelconque des revendications 1 à 11 lorsqu'elles sont exécutées sur un ordinateur.
EP23154753.0A 2018-06-15 2019-04-01 Procédé et agencement de système pour ajuster une longueur d'onde constante Active EP4199651B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102018004826.9A DE102018004826A1 (de) 2018-06-15 2018-06-15 Verfahren und Systemanordnung zum Einstellen einer konstanten Wellenlänge
PCT/EP2019/000106 WO2019238260A1 (fr) 2018-06-15 2019-04-01 Procédé et ensemble formant système servant à régler une longueur d'onde constante
EP19720362.3A EP3707967B1 (fr) 2018-06-15 2019-04-01 Méthode et appareil pour ajuster une longueur d'ondes constante

Related Parent Applications (3)

Application Number Title Priority Date Filing Date
EP19720362.3A Division EP3707967B1 (fr) 2018-06-15 2019-04-01 Méthode et appareil pour ajuster une longueur d'ondes constante
EP19720362.3A Previously-Filed-Application EP3707967B1 (fr) 2018-06-15 2019-04-01 Méthode et appareil pour ajuster une longueur d'ondes constante
EP19720362.3A Division-Into EP3707967B1 (fr) 2018-06-15 2019-04-01 Méthode et appareil pour ajuster une longueur d'ondes constante

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FR3115858B1 (fr) 2020-10-30 2025-06-13 Valeo Vision Procédé de fonctionnement d'un dispositif d'éclairage automobile et dispositif d'éclairage automobile
DE102020132948A1 (de) 2020-12-10 2022-06-15 OSRAM Opto Semiconductors Gesellschaft mit beschränkter Haftung Optoelektronisches modul und verfahren zur herstellung eines optoelektronischen moduls

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ES2946591T3 (es) 2023-07-21
ES3023616T3 (en) 2025-06-02
SG11202008550SA (en) 2020-10-29
EP4199651A1 (fr) 2023-06-21
CN111788867A (zh) 2020-10-16
MY202700A (en) 2024-05-16
EP3707967B1 (fr) 2023-04-26
JP2022105677A (ja) 2022-07-14
WO2019238260A1 (fr) 2019-12-19
US20210368601A1 (en) 2021-11-25
JP2021520025A (ja) 2021-08-12
JP7224076B2 (ja) 2023-02-17
KR102429621B1 (ko) 2022-08-04
CA3086002C (fr) 2023-09-26
CN111788867B (zh) 2023-05-30
US11304278B2 (en) 2022-04-12
KR20200090882A (ko) 2020-07-29
JP7148169B2 (ja) 2022-10-05
DE102018004826A1 (de) 2019-12-19
CA3086002A1 (fr) 2019-12-19
EP3707967A1 (fr) 2020-09-16

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