EP3707967B1 - Méthode et appareil pour ajuster une longueur d'ondes constante - Google Patents

Méthode et appareil pour ajuster une longueur d'ondes constante Download PDF

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Publication number
EP3707967B1
EP3707967B1 EP19720362.3A EP19720362A EP3707967B1 EP 3707967 B1 EP3707967 B1 EP 3707967B1 EP 19720362 A EP19720362 A EP 19720362A EP 3707967 B1 EP3707967 B1 EP 3707967B1
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Prior art keywords
emitting diode
light
temperature
control unit
current value
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EP19720362.3A
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German (de)
English (en)
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EP3707967A1 (fr
Inventor
Stefan Hofmann
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Inova Semiconductors GmbH
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Inova Semiconductors GmbH
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Priority to EP23154753.0A priority 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 aimed at a method that makes it possible, with little technical effort, to set a constant wavelength in a light-emitting diode in such a way that the color of the light-emitting diode remains the same for a human observer with the naked eye. Furthermore, the present invention is aimed at a correspondingly set up system arrangement and at a computer program product with control commands that execute the method or operate the system arrangement.
  • EP 2 273 851 A2 shows a control system and method for controlling the brightness and wavelength of light emitting diode arrays. Regulation is carried out by separate control units, which control the strength and pulse width of the operating current of the light-emitting diodes independently of one another. This is intended to enable efficient and at the same time flexible and precise control of the brightness and the color locus of light-emitting diode arrangements.
  • FIG. 1 shows a light-emitting diode arrangement which comprises a plurality of light-emitting diode plates which are enclosed in a transparent layer.
  • a first light-emitting diode plate is used to measure the temperature within the transparent layer. This enables the temperature within the transparent layer to be as close as possible to the other, to measure heat-generating luminous plates without affecting the luminous properties of the light-emitting diode array too much.
  • a method for measuring the temperature in the light-emitting diode arrangement described is disclosed.
  • WO 2014/067 830 A1 shows methods and arrangements for error correction in light-emitting diodes.
  • the operating currents required to correct errors are stored in a table and called up according to the detected operating state of the light-emitting diodes and applied to the light-emitting diodes.
  • WO 2017/162 323 A1 shows an efficient control arrangement and a control method which make it possible to provide particularly efficient data transmission, in particular for light-emitting diode control units.
  • the publication is also directed to a corresponding protocol, which causes control units to carry out the corresponding method steps.
  • Known methods provide a pulse width modulation PWM, which makes use of the fact that the components used have an inertia such that a uniform brightness is set, even if the light-emitting diode is switched on or off to a certain extent. The brightness is then adjusted depending on the ratio of the on-state to the off-state. Such a pulsing of the light-emitting diode is typically not perceived by the human eye and a uniformly adjustable brightness results from this control.
  • control circuits are known, by means of which the light-emitting diodes are regulated to an adjustable target value, with the target value being adjustable by a controller.
  • light-emitting diodes are dimmed directly by dimming the current through the light-emitting diodes.
  • control logics for regulating the power supply to the light-emitting diode, also as a function of a temperature of the light-emitting diode.
  • Light-emitting diodes LEDs are used in many application scenarios where they should at least not be disadvantageous in relation to incandescent lamps. While incandescent lamps can be easily dimmed in terms of their brightness, methods are known with regard to light-emitting diodes which, for example, control these light-emitting diodes by means of a predetermined control pattern and thereby enable optical dimming. In contrast, however, it is often desirable that a light-emitting diode, for example an increasing ambient temperature must also be made brighter. This is the case because LEDs typically have a lighting behavior that reduces the emitted luminosity as a function of an increasing 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 regard to temperature development. It is therefore disadvantageous according to the prior art that the color variations depending on the temperature development or brightness variations can be so strong that they are recognizable to the human eye and undesirable optical effects result. Such optical effects can relate to the comfort functions of a vehicle, for example, with application scenarios also providing that the light-emitting diodes have a safety function. Light-emitting diodes are also used as optical warning signal generators and the disadvantage of the brightness variation or color variation can be safety-critical.
  • a method for setting a constant wavelength of a light-emitting diode comprising driving 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 driven light-emitting diode, providing an empirically determined wavelength variation of the light-emitting diode as a function of the Temperature of the light-emitting diode and an adjustment of 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 activation of the light-emitting diode typically takes place iteratively and the prevailing temperature at the control unit is measured iteratively.
  • an empirically determined wavelength variation is provided in a preparatory method step.
  • the preset current value is adjusted in a specific cycle or within preset intervals.
  • a constant wavelength of a light-emitting diode is set by means of the proposed method, since the error rate of the light-emitting diode is recognized and the current value is then set accordingly.
  • the constant wavelength is a substantially constant wavelength, with the reference point of the constant wavelength being the human eye. Indeed, from a technical point of view, according to the proposed method, it is possible that the wavelength is not constant, but it is adjusted in such a way that it is constant with respect to the naked human eye. A color value that remains the same for the human observer is thus set by means of the constant wavelength. However, by means of technical aids it can be recognized that the constant wavelength is merely a substantially constant wavelength which varies slightly.
  • a light-emitting diode can be in the form of a red, green, blue or white light-emitting diode.
  • further technical devices are to be provided which, for example, control the individual light-emitting diodes in such a way that a wavelength or a brightness results.
  • the proposed control units are used for this purpose, which indirectly apply a certain current intensity to the light-emitting diodes or carry out pulse width modulation.
  • the brightness or luminosity of each individual light-emitting diode is set by means of pulse width modulation and then the wavelength is set using the current value.
  • the proposed current value is therefore that current value by means of which the light-emitting diode is driven. Nor does it contradict that no current is provided at least temporarily as part of the pulse width modulation.
  • This provision of current takes place as part of the actuation of the light-emitting diode using a preset current value.
  • This method step is also carried out according to the prior art, which has the disadvantage that the constant, preset current value leads to a wavelength variation, which becomes apparent to the viewer in that the color of the light-emitting diode changes. This is due to the changing temperature conditions inside the light-emitting diode.
  • the preset current value is typically stored in a memory unit of the light-emitting diode unit or is provided by the control unit.
  • an actually prevailing temperature of a control unit arranged in the immediate vicinity of the activated light-emitting diode is measured.
  • the control unit can be used for this purpose.
  • a design is obtained which makes it possible for the temperature to be measured at an alternative location and for this purpose the measuring sensor or the temperature sensor can also be arranged on the control unit. Since the temperature is not measured directly at the light-emitting diode, but at 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 light-emitting diode, it is possible to draw conclusions about the temperature of the light-emitting diode during the running time.
  • Immediate proximity is to be interpreted here in such a way that the proximity is essentially immediate, such that only one layer, for example as will be described later, is arranged between the sensor and the control unit.
  • “immediately” is to be interpreted in such a way that no other active components are installed. Consequently, only passive components, such as connecting layers or thermally conductive layers, are arranged between the light-emitting diode and the control unit.
  • the feature in “immediate” proximity is optional in that no further active, heat-generating units are arranged between the light-emitting diode and the control unit.
  • the method step can thus also be carried out in such a way that an actually prevailing temperature of a control unit arranged in the vicinity of the activated light-emitting diode is measured.
  • distances that are less than one millimeter are also understood to be immediate.
  • An empirically determined wavelength variation of the light-emitting diode is then provided as a function of the temperature of the light-emitting diode. This is also referred to as providing a characteristic of the light-emitting diode.
  • the empirically determined wavelength variation indicates the extent to which the wavelength of the light-emitting diode changes as the temperature rises or falls. This is also referred to as the error rate of the LED and gives a technical value that corresponds to a delta of the value of the wavelength that arises when the temperature of the LED rises or falls. This empirical value can be stored in a data memory.
  • the preset current value is adapted.
  • the method thus iteratively branches back into a first method step, which provides for driving the light-emitting diode.
  • the LED will in this case 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 via the temperature, and the current value is set in such a way that the color value of the light-emitting diode is always constant.
  • the actually prevailing temperature is measured at the control unit and not at the light-emitting diode and that the empirically determined wavelength variation provided relates to a temperature of the light-emitting diode. It is therefore advantageous to include a compensation factor here that takes into account that the actual measurement is not actually made on the light-emitting diode, but on the control unit that is arranged. Consequently, it is possible according to the invention to propose an alternative design and also to operate the method accordingly.
  • the light-emitting diode is actually driven using this adapted current value as part of the adaptation of the preset current value. This ensures over time or the temperature development that the light-emitting diode emits a constant wavelength.
  • the method is carried out in each case for a red, blue, green or white-emitting light-emitting diode.
  • This has the advantage that not only can the colors be adjusted using the proposed method, but rather the luminosity can also be adjusted using a white-emitting light-emitting diode, so that no separate method has to be used for brightness compensation.
  • the brightness of the light-emitting diode can thus also be controlled with little technical effort.
  • the method is carried out iteratively such that the adjustment of the preset current value takes place essentially every 2 seconds.
  • This has the advantage that the wavelength is always actually adapted, but this requires less computing effort and the underlying components can then also be configured 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 therefore only negligible error rates occur.
  • the human eye does not detect any deviation in wavelength, i.e. that it perceives a constant wavelength overall. Only from a technical point of view can it be determined using tools that the wavelength varies within the 2 seconds, which is then promptly adjusted.
  • a suitable balance is created between hardware complexity 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, within the scope of driving the light-emitting diode by means of a preset current value, no current can be applied even temporarily and the pulse width modulation can be implemented as a result.
  • the adjustment of the preset current value is performed by means of a stored error function.
  • This has the advantage of being a function empirically can be determined, which multiplies or adds the inverse of the error with regard to the wavelength to the current strength, so that the resulting error, ie the deviation in wavelength, is canceled or compensated.
  • the error function determines a value by which the preset current value must be adjusted to recreate the output wavelength.
  • 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 addend.
  • This has the advantage that a compensation value can be multiplied and/or added up, with a combination of both options also being 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 set or the error in the deviation of the wavelength is compensated.
  • the error function determines the temperature of the light-emitting diode as a function of the actually prevailing temperature of the control unit.
  • This has the advantage that the temperature value does not have to be taken directly from the light-emitting diode, but rather the temperature of the control unit is measured according to the invention and the temperature of the light-emitting diode is then deduced.
  • an alternative design can be accomplished and empirical values can be consulted which indicate at which temperature of the control unit which values of the temperature prevail at the light-emitting diode.
  • conclusions can be drawn about the wavelength, which in turn allows the current value to be adjusted in such a way that the desired wavelength is set again. This is the case 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 which, for example, corresponds to the accuracy of the naked human eye. If the value falls below or exceeds this threshold value, the current value is adapted and the hardware components on which it is based can be configured particularly efficiently. This is the case because not every deviation has to be compensated for immediately, but rather the threshold value can be chosen so large that the variation is not visible to the human eye.
  • the threshold value can also take the underlying hardware into account, and this in turn can be configured efficiently.
  • the empirically determined wavelength variation specifies a characteristic 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 close proximity is less than 1 mm.
  • a proximity of less than 1 mm typically does not lead to a large falsification with regard to the temperature, and the temperature of the control unit can be used as a basis for the method according to the invention instead of the temperature of the light-emitting diode.
  • the close proximity is adjusted by means of a thickness of an adhesive layer, a silicone layer, a polymer layer, a thermally conductive 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 light-emitting diode and the control unit or, alternatively, the distance between the sensor and the control unit is adjusted in such a way that at least one of the listed layers is used.
  • This is generally close proximity as no electronic components are placed between the proposed nominal units and hence no new heat source is created.
  • the current value is adapted 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 light-emitting diode.
  • the control unit is provided as a controller, a controller chip, a logic circuit, a logic gate or a microcontroller.
  • This has the advantage of being efficient Computing units are used as control units, which control the light-emitting diode or the light-emitting diodes.
  • the light-emitting diode can be controlled by means of a pulse width modulation by means of a corresponding control unit, and in particular according to the invention the light-emitting diode is controlled by means of a preset current value, which can be regulated by the control unit, for example.
  • a system arrangement for setting a constant wavelength of a light-emitting diode having a control unit set up for driving the light-emitting diode by means of a preset current value, at least one sensor set up for measuring an actually prevailing temperature of the control unit arranged in the immediate vicinity of the driven light-emitting diode, a 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 adjust 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 object is also achieved by a computer program product with control commands that 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 includes method steps which can be simulated functionally using the structural features of the system arrangement.
  • the system arrangement includes functional components that create a function according to the proposed method steps.
  • the computer program product is used both to carry out the method steps and to operate the system arrangement.
  • FIG. 1 shows a diagram on the left-hand side, with the temperature of the light-emitting diode being marked on the x-axis and the resulting wavelength, which is emitted by the light-emitting diode, being marked on the y-axis.
  • a constant wavelength is typically required, but this disadvantageously varies with temperature.
  • wavelength increases with increasing temperature, causing the viewer to perceive a color variation which is so is not desired.
  • An analogous example is shown on the right for a specific value.
  • the present invention sets itself the task of compensating for this variation in the wavelength.
  • the wavelength varies as a function of the current provided and as a result the wavelength decreases as the current increases.
  • a characteristic curve development is also shown on the right-hand side, with the wavelength again being plotted on the y-axis and the current on the x-axis.
  • 3 shows one aspect of the present invention, namely that it can be determined at which temperature which wavelength prevails and for this purpose it can also be calculated how a corresponding error function is to be configured. For example, values of 20 °C and 110 °C are taken into account.
  • a corresponding diagram is shown on the right-hand side, which in turn shows the current value provided on the x-axis and the wavelength on the y-axis. According to the invention, these two diagrams are now shown in FIG 3 are combined and the increasing wavelength on the left as a function of temperature is eliminated with the decreasing wavelength on the right as a function of the supplied current value.
  • both diagrams are therefore combined with one another, and the current value is increased as the temperature rises.
  • the wavelength thus increases with temperature, which is compensated according to the invention in that the error function increases the set current value such that the increase on the left side results in a reduction in the wavelength on the right side.
  • a constant wavelength, which is created according to the invention, is then superimposed on both curves.
  • the current value is set as a function of 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, ie the red, green, blue and white light-emitting diode.
  • FIG. 4 shows the proposed system arrangement, with a temperature sensor being arranged at the top left, which measures the temperature on the control unit or in the immediate vicinity of the light-emitting diode and then transmits the measured value in analog form to an analog-to-digital converter.
  • This component then provides the digital measured value to the error function component.
  • On the left is what is known as a one-time programmable module, i.e. a non-volatile memory, also referred to as OTP for short.
  • the error function component then sends the value to be set to a digital-to-analog converter, which then addresses the light-emitting diode.
  • figure 5 1 shows a schematic flow chart of the proposed method for setting a constant wavelength of a light-emitting diode, comprising driving 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 driven 100 light-emitting diode Control unit, providing 102 an empirically determined wavelength variation of the light-emitting diode depending on the temperature of the light-emitting diode and adjusting 103 the preset current value depending on 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 measurement location.
  • Several measurement locations are suitable for this, for example a measurement location on exactly one light-emitting diode, a measurement location on each light-emitting diode, a measurement location on a microcontroller connected to a light-emitting diode, or a measurement location in the immediate vicinity of a light-emitting diode.
  • the proposed method is used with a number of interconnected light-emitting diodes. In this case, it is possible for several light-emitting diodes to be connected in series, for example.
  • this plurality of light-emitting diodes is installed in an automobile, it may be that different temperatures prevail at different locations.
  • the light-emitting diodes can not only heat up of their own accord, but temperature can also be radiated by adjacent components. It is thus possible according to the invention to take this into account and to determine a temperature value at a number of measurement locations.
  • an immediate environment describes an environment which allows conclusions to be drawn about the temperature of the light-emitting diode. So this temperature does not have to be able to be determined directly on the light-emitting diode, but rather a temperature sensor can be spaced from the light-emitting diode in such a way that temperature input from neighboring components is negligible. In particular, this means that there must be no physical contact in the sense of touching the temperature sensor and the light-emitting diode.
  • 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 colour.
  • 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 to use 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. Furthermore, the proposed method has the advantage that the brightness can be compensated independently of the color setting of the light-emitting diode.
  • a light emitting diode package exists as a semiconductor device or as any light emitting component. Emission of different colors, or light in different wavelengths, is used 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 in relation to the current values in such a way that the same brightness value of the light-emitting diode is always established. In particular, the number of current value/temperature value pairs can be determined in a preparatory method step.
  • the storage module or the storage of the current values is to be interpreted in such a way that any type of storage module or storage is possible.
  • the memory module therefore does not have to be set up dynamically in such a way that it can be written to during a running time, that is to say while the current regulator is being activated have to be. Rather, storage only requires the introduction of the corresponding information in some way into a hardware module. It may also be necessary not to provide an individual memory module, but rather to provide additional components for this purpose, which make it possible to provide the current value.
  • 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, which are set with regard 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 into 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 colored light can also be set by suitably controlling the individual components.
  • color transitions can also be generated.
  • the so-called multi-LED components can be used, for example.

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Claims (12)

  1. Procédé pour ajuster une longueur d'onde constante d'une diode électroluminescente, présentant les étapes consistant à :
    - piloter (100) la diode électroluminescente au moyen d'une valeur de courant préréglée ;
    - mesurer (101) une température prévalant effectivement d'une unité de commande disposée à proximité immédiate de la diode électroluminescente pilotée (100), seules des couches de liaison ou des couches thermoconductrices étant disposées entre la diode électroluminescente et l'unité de commande,
    - mettre à disposition (102) une variation de longueur d'onde déterminée empiriquement de la diode électroluminescente en fonction d'une température de la diode électroluminescente ; et
    - adapter (103) la valeur de courant préréglée en fonction de la température prévalant effectivement 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 prévalant effectivement de l'unité de commande, dans lequel
    - l'unité de commande est mise à disposition sous la forme d'un contrôleur, d'une puce de contrôleur, d'un circuit logique, d'une porte logique ou d'un microcontrôleur et
    - la température prévalant effectivement est mesurée au niveau de l'unité de commande.
  2. Procédé selon la revendication 1, dans lequel le procédé est mis en œuvre pour une diode électroluminescente émettant respectivement une lumière rouge, bleue, verte ou blanche.
  3. Procédé selon la revendication 1 ou 2, dans lequel le procédé est exécuté de manière itérative de telle sorte que l'adaptation (103) de la valeur de courant préréglée est effectuée sensiblement toutes les deux secondes.
  4. Procédé selon l'une 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 met à disposition une valeur de compensation qui compense la variation de longueur d'onde de la diode électroluminescente.
  6. Procédé selon la revendication 5, dans lequel la valeur de compensation est présente sous la forme d'un facteur de compensation et/ou d'un terme de compensation.
  7. Procédé selon l'une des revendications précédentes, dans lequel l'adaptation (103) de la valeur de courant préréglée est effectuée lorsqu'une longueur d'onde réelle s'écarte de la longueur d'onde de consigne de plus d'une valeur seuil.
  8. Procédé selon l'une des revendications précédentes, dans lequel la variation de longueur d'onde déterminée empiriquement spécifie une courbe caractéristique de la diode électroluminescente.
  9. Procédé selon l'une des revendications précédentes, dans lequel la proximité immédiate est inférieure à un millimètre.
  10. Procédé selon l'une 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 thermoconductrice, d'une couche d'aluminium et/ou d'une couche de cuivre.
  11. Agencement de système pour ajuster une longueur d'onde constante d'une diode électroluminescente, présentant :
    - une unité de commande conçue pour piloter (100) la diode électroluminescente au moyen d'une valeur de courant préréglée ;
    - au moins un capteur de mesure conçu pour mesurer (101) une température prévalant effectivement de l'unité de commande disposée à proximité immédiate de la diode électroluminescente pilotée (100), seules des couches de liaison ou des couches thermoconductrices étant disposées entre la diode électroluminescente et l'unité de commande ;
    - une unité d'interface conçue pour mettre à disposition (102) une variation de longueur d'onde déterminée empiriquement de la diode électroluminescente en fonction d'une température de la diode électroluminescente ; et
    - une interface de compensation conçue pour adapter (103) la valeur de courant préréglée en fonction de la température prévalant effectivement 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 pouvant être 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 prévalant effectivement de l'unité de commande, dans lequel
    - l'unité de commande est réalisée sous la forme d'une puce de contrôleur et
    - ledit au moins un capteur de mesure est conçu pour mesurer la température prévalant effectivement au niveau de l'unité de commande.
  12. Produit programme d'ordinateur comprenant des instructions de commande qui mettent en œuvre le procédé selon l'une des revendications 1 à 10 lorsqu'elles sont exécutées sur un agencement de système selon la revendication 11.
EP19720362.3A 2018-06-15 2019-04-01 Méthode et appareil pour ajuster une longueur d'ondes constante Active EP3707967B1 (fr)

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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

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EP23154753.0A Previously-Filed-Application EP4199651A1 (fr) 2018-06-15 2019-04-01 Procédé et agencement de système pour ajuster une longueur d'onde constante
EP23154753.0A Division-Into EP4199651A1 (fr) 2018-06-15 2019-04-01 Procédé et agencement de système pour ajuster une longueur d'onde constante

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CN (1) CN111788867B (fr)
CA (1) CA3086002C (fr)
DE (1) DE102018004826A1 (fr)
ES (1) ES2946591T3 (fr)
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EP4199651A1 (fr) 2023-06-21
KR102429621B1 (ko) 2022-08-04
SG11202008550SA (en) 2020-10-29
JP7224076B2 (ja) 2023-02-17
CN111788867A (zh) 2020-10-16
DE102018004826A1 (de) 2019-12-19
US11304278B2 (en) 2022-04-12
CA3086002A1 (fr) 2019-12-19
CA3086002C (fr) 2023-09-26
JP7148169B2 (ja) 2022-10-05
EP3707967A1 (fr) 2020-09-16
CN111788867B (zh) 2023-05-30
US20210368601A1 (en) 2021-11-25
JP2021520025A (ja) 2021-08-12
WO2019238260A1 (fr) 2019-12-19
KR20200090882A (ko) 2020-07-29
JP2022105677A (ja) 2022-07-14
ES2946591T3 (es) 2023-07-21

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