EP3427543B1 - Méthode et appareil de compensation de luminosité d'une del - Google Patents

Méthode et appareil de compensation de luminosité d'une del Download PDF

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Publication number
EP3427543B1
EP3427543B1 EP17706406.0A EP17706406A EP3427543B1 EP 3427543 B1 EP3427543 B1 EP 3427543B1 EP 17706406 A EP17706406 A EP 17706406A EP 3427543 B1 EP3427543 B1 EP 3427543B1
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Prior art keywords
light
value
emitting diode
temperature
led
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EP17706406.0A
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German (de)
English (en)
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EP3427543A1 (fr
Inventor
Roland Neumann
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Inova Semiconductors GmbH
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Inova Semiconductors GmbH
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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]
    • H05B45/10—Controlling the intensity 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]
    • H05B45/10—Controlling the intensity of the light
    • H05B45/18—Controlling the intensity of the light using temperature feedback

Definitions

  • the present invention is directed to a method for brightness compensation in at least one light-emitting diode.
  • the proposed method always achieves the same brightness of the LED regardless of temperature fluctuations.
  • the invention is also directed to a correspondingly configured device and a memory module for use in the proposed method.
  • US 2008/0079371 A1 shows an arrangement for color correction of a light-emitting diode as a function of a measured temperature, a current value being calculated.
  • US 2012/0319585 A1 shows a further arrangement for color correction of a light-emitting diode as a function of a measured temperature.
  • WO 2014/067830 A1 shows a method for temperature-corrected control of light emitting diodes.
  • EP 2 141 965 A1 shows a method for driving a display.
  • LEDs are used in many different colors, sizes and designs. They are used as signal and light transmitters in the "automotive sector", among others. Typically, a light emitting diode should always provide a set brightness. The disadvantage here is the decreasing luminosity with increasing temperature. The prior art knows methods which are intended to set a luminosity. Known methods address primarily a dimming of light-emitting diodes, while solutions for general compensation of the luminosity are disadvantageous, since typically temperature fluctuations are not or only insufficiently taken into account.
  • PWM pulse width modulation
  • control circuits are known through which the light-emitting diodes are regulated to an adjustable setpoint, the setpoint 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 current supply to the light-emitting diode are also known as a function of a temperature of the light-emitting diode.
  • light-emitting diodes are used in which they should at least not be disadvantageous with regard to incandescent lamps. While light bulbs can be easily dimmed with respect to 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 to this, however, it is often desirable that a light-emitting diode, for example, must also be set brighter when the ambient temperature rises. This is the case since LEDs typically have a luminous behavior which reduces the emitted luminosity as a function of an increasing temperature value.
  • LEDs should not vary in brightness depending on the temperature, but if these LEDs heat up during their operation or adjacent components radiate heat, the LEDs should always provide the same brightness. It is also an object of the present invention to provide a memory module which provides data for brightness compensation of at least one light-emitting diode.
  • a method for brightness compensation of at least one light-emitting diode as a function of a temperature value comprises the steps of measuring a temperature value with regard to a plurality of light-emitting diodes and reading out a current value from a plurality of current values stored in a memory module, which current value is assigned to the read-out temperature value. Furthermore, at least one current regulator and one light-emitting diode are activated by means of the current value read out.
  • Brightness compensation can be carried out efficiently in such a way that essentially analog components are provided which typically set the brightness of a light-emitting diode independently of its color value.
  • the method according to the invention can be combined with conventional methods in such a way that, for example, a color value is set by means of pulse width modulation and, furthermore, the brightness of the light-emitting diode is only achieved by driving the light-emitting diode on the basis of the current value read out.
  • a constant current regulator also referred to as a constant current regulator, can be used for this purpose. It is also possible to set an LED in the color value by means of an on / off modulator.
  • 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 in relation 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 combined to a predetermined color value. For example, it is possible to set a mixing ratio in such a way that the LED emits a total of white light.
  • any desired colored light can also be set by suitable control of the individual components.
  • color transitions can also be created.
  • the so-called multi-LED components can be used, for example.
  • the proposed method makes it possible to control the brightness essentially independently of the color setting. It can thus be avoided according to the invention that additional bits must be provided when setting the color value in order to set the brightness of the light-emitting diode with the color value.
  • the disadvantage of conventional methods for example a color value, is overcome by driving a current value of the light-emitting diode must be set using 8 bits, but 10 bits must be transmitted. According to the known methods, a so-called remainder must remain in the coding, which is used to adjust the brightness. According to the invention, this is overcome by the fact that the bit values to be used are used essentially solely for color adjustment. Analog components are typically provided for this purpose, which trigger the current regulator to be actuated by means of the suitable current value, regardless of the color value set.
  • the current value is provided in a particularly advantageous manner by means of a readout.
  • This offers the advantage that no separate logic, for example by means of digital components, has to be provided.
  • the logic which is provided in conventional methods for providing the current value, is implemented according to the invention only by reading out a data memory. Thus, no further method steps are necessary which would cause a current value to be calculated. It is thus possible according to the invention with little technical effort, i.e. with highly efficient, for example analog, components and a few process steps to provide a suitable current value with which the light-emitting diodes are controlled.
  • this can be achieved in that the current values which cause a certain brightness in an LED can be determined before the method is carried out or in preparatory method steps of the method.
  • this is typically done only once and can therefore be used with a large number of uniform light-emitting diodes.
  • This enables light-emitting diode compensation devices which advantageously require fewer components, and in particular fewer complex components.
  • the proposed method enables a robust determination of the current value in such a way that arithmetic or logic errors are avoided when determining the current value.
  • the stored current values before delivery corresponding components can be tested as desired. Thus, these current values are not generated at runtime, but rather are determined a priori, tested and only made available by means of efficient hardware.
  • the temperature value can refer to a temperature condition of the light-emitting diode. It can therefore be advantageous to determine the temperature value directly on the light-emitting diode. For this purpose, however, it is also possible to determine an ambient value of the light-emitting diode in the immediate vicinity of the light-emitting diode. It can also be advantageous to determine several temperature values and to combine them into a single temperature value. In this way, temperature values of adjacent components can also be determined and these can be averaged after adding them up. If light emitting diodes are connected in series, several temperature values of a particular light emitting diode can be measured and these values can be averaged. This can also be achieved by means of analog circuits and does not require any digital components for this.
  • a current value is read out from a plurality of current values stored in a memory module, which current value is assigned to the read-out temperature value.
  • current values are to be determined in preparatory method steps, which generate a certain brightness as a function of a temperature value. For example, it is the case that a certain light-emitting diode requires a current value of 5 mA, that is 5 milliamps, at a temperature value of 24 ° C. Since the light emitting diode glows less with increasing temperature, i.e.
  • a current value of 10 mA may be necessary at a temperature of 50 ° C in order to achieve the same brightness as is achieved at 5 ° C at a temperature of 24 ° C . If the temperature of the light emitting diode is 100 ° C, a current value of 20 mA may be necessary to achieve the same brightness.
  • the same LED at 24 ° C and a control with 5 mA thus achieves the same brightness as this same LED when controlled by 10 mA reached at 50 ° C.
  • the brightness behavior of the light-emitting diode is thus set as a function of the temperature value determined. This is particularly advantageous since the observer of the light-emitting diode always perceives the same brightness, even if the temperature of the light-emitting diode changes during operation.
  • the brightness of the light-emitting diode is set essentially the same, the brightness being compensated in such a way that the human eye does not perceive any difference in brightness. It may therefore be necessary to run the method iteratively in such a way that certain temperature jumps are recognized immediately and the controlling current value is reset.
  • a time interval which determines how long the temperature value is measured on the light-emitting diode or in its surroundings.
  • a predetermined cycle can also be adhered to, which determines a time interval between two iterations of the method. As an example, it can be determined that the temperature is 30 ° C and after 5 seconds the temperature value is determined again, that the light-emitting diode has heated up in such a way that the temperature now results in 31 ° C. Depending on the measured 31 ° C, the corresponding current value is read out and the brightness of the LED is compensated.
  • the person skilled in the art is familiar with further intervals or frequencies with which he can measure temperatures and control light-emitting diodes. This can be set, for example, depending on the components used. It is also possible to determine temperature intervals in such a way that a current value is assigned to each temperature range. For example, it is possible to assign a current value to temperature steps of 10 ° C or 20 ° C. For example, a current value can be assigned to a temperature interval from 60 ° C to 80 ° C. It is thus possible to carry out the provision of the current value in such an efficient manner that the brightness of the LED must be adjusted, but only when leaving the limits of a temperature interval.
  • a logical table is suitable for storing the individual current values together with temperature values or temperature intervals. This is not restricted to the fact that a table actually exists, rather any representations are possible, for example at least one attribute / value pair or at least one value / value pair. In particular, it is advantageous to store the individual values in such a way that they can be read out and processed efficiently. This means that hard-coded circuits or hard-wired components are also suitable. This is possible because there is no change after the corresponding components have been delivered and thus a hard-wired provision of the corresponding logical table can be carried out.
  • the memory module or the storage of the current values is to be interpreted in such a way that any type of memory module or storage is possible.
  • the memory module does not have to be set up so dynamically that it has to be writable during a runtime, that is to say while the current controller is being driven.
  • storage only requires the introduction of the corresponding information in some way into a hardware module. It may also be necessary not to provide a single memory module, but to provide additional components for this purpose, which make it possible to provide the current value.
  • the assignment of the current values to the temperature values also takes place in preparatory method steps and results implicitly when the proposed method is operated by the fact that a current value is already available for each measured temperature value.
  • At least one current regulator and one light-emitting diode are activated by means of the electricity network read out.
  • the brightness value of the light-emitting diode is thus set by the amount of the respective current value.
  • the current regulator is thus set up to apply the predetermined voltage to the light-emitting diode or to the light-emitting diode units.
  • the light-emitting diode is thus controlled by means of the current value read out. This takes place according to the invention until a new temperature value together with an associated current value is determined again and the light-emitting diode is driven with this new current value.
  • the brightness of the light-emitting diode is thus permanently set, for which purpose different current values are required at different times depending on the prevailing temperature.
  • At least one sensor is provided for measuring the temperature value at at least one measuring 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 that is connected to a light-emitting diode, or a measurement location in the immediate vicinity of a light-emitting diode.
  • the proposed method is used in the case of a plurality of connected light-emitting diodes. It is possible that, for example, several light emitting diodes are connected in series. If this plurality of light emitting diodes is installed in an automobile, different temperatures may prevail at different locations.
  • the light-emitting diodes can not only heat themselves, but that temperature can also be emitted by adjacent components. It is therefore possible according to the invention to take this into account and to determine a temperature value at several measuring locations.
  • An immediate environment describes an environment that allows a conclusion to be drawn about the temperature of the light-emitting diode. Thus, this temperature does not have to be able to be determined directly on the light-emitting diode, but a temperature sensor can be spaced from the light-emitting diode in such a way that a temperature input from neighboring components is negligible. In particular, this means that there is no need for physical contact in the sense of touching the temperature sensor and the light-emitting diode.
  • the light-emitting diode is in the form of a triple of three light-emitting diode units, and the light-emitting diode units each emit a different color.
  • This has the advantage that colored LEDs can be used.
  • it is possible according to the invention to continue to use conventional LEDs and to only control the current regulator of these LEDs in such a way that the advantage according to the invention is achieved.
  • the proposed method has the advantage that the brightness compensation can take place independently of the color setting of the light-emitting diode.
  • those skilled in the art are familiar with further light-emitting diodes which have light-emitting diode units which can be reused according to the invention.
  • a light-emitting diode unit is present as a semiconductor component or as any light-emitting component. Sending out different colors, or light in different wavelengths, serves to set a predetermined color value.
  • the 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.
  • the number of current value / temperature value pairs can be determined in a preparatory method step.
  • the read current value is assigned to a temperature interval in which the measured temperature value lies.
  • a first temperature interval can have a first temperature range of 5 ° C and a second temperature interval can have a second temperature range of 10 ° C.
  • the current value with respect to the temperature value is selected such that brightness compensation of the light-emitting diode to be controlled is set up as a function of a prevailing temperature.
  • This has the advantage that not only a brightness of the light-emitting diode is set, but that a brightness is set again over a time course in such a way that the brightness is always compensated as a function of the temperature value. This is the case because the brightness value changes as a function of the temperature value and if a new temperature value is detected, the brightness value can also be compensated again in such a way that it fulfills the preset target value.
  • the current regulator is in the form of a constant current regulator.
  • This has the advantage that known components can be reused and the arrangement only has to be adapted such that it carries out the method according to the invention.
  • Known current regulators can thus be used which control the light-emitting diode with the advantageously determined current value.
  • the temperature value represents an average value of a plurality of measured individual temperature values.
  • This has the advantage that a plurality of temperature values, which are determined at different measuring locations, can be linked in a simple manner to form a single temperature value.
  • This can be implemented using hard-wired logic, for example. According to the invention, however, it is also possible to design the device or the method in such a way that no logic has to be used. In this case, the memory module is simply read out without these values having to be interpreted in any way. Thus, only a single lookup operation takes place without any logic.
  • a plurality of temperature values are stored using at least one determination routine.
  • Empirical determination, measurement, two-point measurement, calculation and readout of the respective current values are possible. Saving the current values for the respective temperature values is therefore filling the logical table which describes the current value at which temperature must be applied. This can be done in preparatory method steps such that a certain current value is applied to a light-emitting diode at a certain temperature and the brightness is measured. This is carried out iteratively so frequently that it can be determined how the temperature or the applied voltage or the current value affects the emitting of light.
  • the attribute-value pairs or value / value pairs are stored, which lead to a constant brightness. This includes, for example, measuring such that an applied current value is varied in such a way that the brightness results as a function of the prevailing temperature. This can also be calculated in advance, for which additional parameters are typically necessary. For this purpose, it is possible to query the corresponding parameters from a manufacturer, for example. Corresponding tables can also be provided by the manufacturer of the light-emitting diode and then only have to be read out.
  • the plurality of stored current values are set with respect to the respective temperature value in such a way that they always bring about the same brightness when the light-emitting diode is activated.
  • the at least one current regulator is activated by means of the current value read out, independently of a setting of a color value of the light-emitting diode.
  • This has the advantage that known methods can continue to be used to adjust the color of the light-emitting diode.
  • a specific bit value can be used to set the color value, which does not have to carry any further bits in order to set a brightness.
  • This has the further advantage that if, for example, 8 bits are sufficient for setting the color value and not 10 bits are required for setting a color value and brightness, as is conventionally the case.
  • This has the disadvantage that the pulse width modulation would have to generate faster edges and additional bandwidth would be wasted. This is avoided according to the invention in that the color values are set separately and the brightness is set independently of this by means of the current regulator.
  • the invention is also achieved by a device for brightness compensation of at least one light-emitting diode as a function of a temperature value.
  • the device has at least one sensor that is set up to measure a temperature value with respect to a plurality of light-emitting diodes and an interface component that is set up to read out a current value from a plurality of stored current values from a memory module which is assigned to the temperature value read out.
  • a current regulator is provided, which is set up to control at least one light-emitting diode by means of the current value read out.
  • the object is also achieved by a memory module with stored current values, each of which is assigned a temperature value such that when a light-emitting diode is driven with the respective current value at a prevailing temperature according to this temperature value, the light-emitting diode shines equally brightly.
  • a storage medium is provided with control commands for executing a method according to one of the previously described aspects.
  • the device is suitable for executing the proposed method and thus takes over its features in a structural manner.
  • the method for operating the device can also be used and the memory module according to the invention can be used both in the proposed method and in the proposed device.
  • Fig. 1 shows brightness values on the Y-axis, which decrease as a percentage from the maximum brightness 100% up to a non-lighting 0%. Temperature values which relate to the corresponding light-emitting diode are entered on the X-axis.
  • the course of the upper line which is in the present Fig. 1 extends from top left to bottom right, that the brightness of the LED decreases in the direction of increasing temperature.
  • the bottom line shows which in the present Fig. 1 runs from the bottom left to the top right, indicating that with increasing temperature, higher current values are necessary to achieve a certain brightness.
  • the left scale of the Y axis thus refers to the upper curve and the right scale to the lower curve. In the present case, the curve is replaced by a line.
  • Fig. 1 Whether the behavior is now as linear as Fig. 1 shows, or whether curves are to be provided depends on the respective LEDs. For this is the present Fig. 1 to be understood only schematically in such a way that when the temperature value increases, an increase in the current value is also necessary in order to set the same brightness in each case.
  • the values stored in the memory module are typically a plurality of courses, only one of which is shown in the present example Fig. 1 is entered.
  • Fig. 2 shows a schematic flow diagram of the method according to the invention, wherein a temperature value is measured 100 with respect to a plurality of light-emitting diodes. This is followed by reading 101 of a current value from a plurality of current values stored in a memory module, which current value is assigned to the read-out temperature value. In a subsequent method step, at least one current regulator, in each case one light-emitting diode, is activated by means of the current value read out. As in the present Fig. 2 it can be seen that it is particularly advantageous to run the method iteratively in such a way that temperature values are always measured and then a current value is read out, on the basis of which the light-emitting diode is controlled.
  • a current value 101 after measuring a temperature value and, if the current value has not changed, to branch directly back to method step 100.
  • Fig. 3 shows the device 200 according to the invention for brightness compensation of at least one light-emitting diode LED.
  • So-called ON / OFF modulators are provided for setting color values, which set a specific mixing ratio of the individual light-emitting diode units.
  • a so-called RGB code is provided, for which in turn 8 bits are provided.
  • the light-emitting diode units are controlled separately by the device 200 according to the invention. This means that the color value is set independently of the brightness setting.
  • the device 200 can be connected to a memory chip, for example that provides the table with the corresponding current values.
  • the device 200 does not calculate any current values and therefore does not provide any logic for this, but rather that this device 200 only looks up in a connected memory module and thus receives the corresponding values.
  • the ON / OFF modulators operate regardless of the setting of the current value.
  • Fig. 4 shows in a schematic diagram how current values can be provided as a function of measured temperature values. This can be used both in the method according to the invention, in the device and in the memory module. Current values are entered on the Y axis and brightness values on the X axis. It can be seen here that a certain current value is necessary for a certain bit value. To do this, are on the right side of this Fig. 4 Temperature intervals are specified, each of which requires its own current value in order to achieve the preset brightness. As can be seen from the line of lines starting from the zero point, the corresponding current value can be determined by means of an angle which is set as a function of a prevailing temperature value. It is particularly advantageous here that this can be carried out before the method according to the invention is carried out and the results therefore only have to be stored.
  • the current values must be set correspondingly steeper with higher temperature values.
  • the angle between the X axis and the line of lines increases with increasing temperature.
  • a maximum current value at a maximum temperature of 125 ° C can already be 20.7 mA.
  • a current value of 4.66 mA can be sufficient.
  • greater compensation is necessary with increasing temperature.
  • the values entered on the Y axis, which are each marked with an X, in the present case three X are provided for the temperature range from 60 ° C. to 80 ° C.
  • Such an application in the direction of the Y axis can, for example, take place depending on a brightness value of the X axis.
  • a particularly preferred exemplary embodiment of the present invention is the use of the aspects described in an automobile. In general, however, the present invention is not limited to this, rather the person skilled in the art recognizes various other possible uses in order to always offer the same brightness to a viewer of a light-emitting diode.

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Claims (10)

  1. Procédé de compensation de luminosité de plusieurs diodes électroluminescentes (LED) en fonction d'une valeur de température, présentant les étapes consistant à :
    - mesurer (100) la valeur de température par rapport à une pluralité de diodes électroluminescentes (LED), plusieurs capteurs étant prévus pour mesurer la valeur de température à plusieurs emplacements de mesure et la valeur de température représentant une valeur moyenne de plusieurs valeurs de température individuelles mesurées, un capteur étant prévu sur chaque diode électroluminescente (LED) et un intervalle de temps étant défini, lequel détermine pendant combien de temps la valeur de température individuelle respective est mesurée sur la diode électroluminescente respective ;
    - lire (101) une valeur de courant à partir de plusieurs valeurs de courant qui sont mémorisées dans un module mémoire et qui sont associées à la valeur de température mesurée, la valeur de courant lue étant associée à un intervalle de température dans lequel la valeur de température mesurée se situe ; et
    - commander (102) au moins un régulateur de courant de chaque fois une LED au moyen de la valeur de courant lue.
  2. Procédé selon la revendication 1, dans lequel la diode électroluminescente (LED) est présente sous la forme d'un triplet de trois unités de diode électroluminescente (LED) et les unités de diode électroluminescente (LED) émettent chacune une couleur différente.
  3. Procédé selon la revendication 1 ou 2, dans lequel le module mémoire fournit une pluralité de valeurs de température auxquelles une valeur de courant est chaque fois associée.
  4. Procédé selon l'une des revendications précédentes, dans lequel la valeur de courant est choisie par rapport à la valeur de température de telle sorte qu'une compensation de luminosité de la diode électroluminescente (LED) à commander soit conçue en fonction d'une température ambiante.
  5. Procédé selon l'une des revendications précédentes, dans lequel le régulateur de courant est présent sous la forme d'un régulateur de courant constant.
  6. Procédé selon l'une des revendications précédentes, dans lequel la mémorisation de plusieurs valeurs de température avec une valeur de courant respective est effectuée en utilisant au moins une routine de détermination de valeur de courant parmi un ensemble de routines, l'ensemble présentant : une détermination empirique, une mesure, une mesure en deux points, un calcul et une lecture des valeurs de courant respectives.
  7. Procédé selon l'une des revendications précédentes, dans lequel lesdites plusieurs valeurs de courant mémorisées sont réglées par rapport à la valeur de température respective de telle sorte qu'elles produisent toujours la même luminosité lorsque la diode électroluminescente (LED) est commandée.
  8. Procédé selon l'une des revendications précédentes, dans lequel ledit au moins un régulateur de courant est commandé (102) au moyen de la valeur de courant lue indépendamment d'un réglage d'une valeur de couleur de la diode électroluminescente (LED).
  9. Dispositif (200) de compensation de luminosité de plusieurs diodes électroluminescentes (LED) en fonction d'une valeur de température, présentant :
    - plusieurs capteurs conçus pour mesurer la valeur de température par rapport à une pluralité de diodes électroluminescentes (LED) à plusieurs emplacements de mesure, la valeur de température représentant une valeur moyenne de plusieurs valeurs de température individuelles mesurées, un capteur étant prévu sur chaque diode électroluminescente (LED) et un intervalle de temps étant défini, lequel détermine pendant combien de temps la valeur de température individuelle respective est mesurée sur la diode électroluminescente respective ;
    - un composant d'interface conçu pour lire une valeur de courant à partir de plusieurs valeurs de courant mémorisées dans un module mémoire, lesquelles sont associées à la valeur de température mesurée, la valeur de courant lue étant associée à un intervalle de température dans lequel la valeur de température mesurée se situe ; et
    - un régulateur de courant conçu pour commander chaque fois au moins une LED au moyen de la valeur de courant lue.
  10. Support de stockage lisible par ordinateur comprenant des instructions qui, lorsqu'elles sont exécutées par un ordinateur, amènent celui-ci à mettre en œuvre le procédé selon l'une des revendications 1 à 8.
EP17706406.0A 2016-03-10 2017-01-26 Méthode et appareil de compensation de luminosité d'une del Active EP3427543B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016104440.7A DE102016104440A1 (de) 2016-03-10 2016-03-10 Verfahren und Vorrichtung zur Helligkeitskompensation einer LED
PCT/EP2017/000092 WO2017153026A1 (fr) 2016-03-10 2017-01-26 Procédé et dispositif de compensation de luminosité d'une led

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EP3427543A1 EP3427543A1 (fr) 2019-01-16
EP3427543B1 true EP3427543B1 (fr) 2020-07-15

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JP (1) JP6700412B2 (fr)
KR (1) KR102132549B1 (fr)
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DE102018004826A1 (de) 2018-06-15 2019-12-19 Inova Semiconductors Gmbh Verfahren und Systemanordnung zum Einstellen einer konstanten Wellenlänge
DE102018010305B4 (de) 2018-09-10 2020-01-09 Inova Semiconductors Gmbh Segmentierte Steuerungsanordnung
DE202018006211U1 (de) 2018-09-10 2019-08-19 Inova Semiconductors Gmbh Segmentierte Steuerungsanordnung
DE102018007144B4 (de) 2018-09-10 2019-10-10 Inova Semiconductors Gmbh Leitungstreibervorrichtung zur Datenflusskontrolle
DE202018006224U1 (de) 2018-09-10 2019-08-28 Inova Semiconductors Gmbh Effiziente Leitungstreibervorrichtung zur Datenflusskontrolle
DE102018010311B3 (de) 2018-09-10 2019-12-05 Inova Semiconductors Gmbh Effiziente Leitungstreibervorrichtung zur Datenflusskontrolle
DE102018007143B4 (de) 2018-09-10 2019-10-10 Inova Semiconductors Gmbh Effiziente Leitungstreibervorrichtung zur Datenflusskontrolle
DE102018010307B4 (de) 2018-09-10 2020-01-09 Inova Semiconductors Gmbh Segmentierte Steuerungsanordnung
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WO2017153026A1 (fr) 2017-09-14
KR20180114914A (ko) 2018-10-19
US20190059137A1 (en) 2019-02-21
ES2816062T3 (es) 2021-03-31
MY192700A (en) 2022-09-01
EP3427543A1 (fr) 2019-01-16
JP6700412B2 (ja) 2020-05-27
CN108886851A (zh) 2018-11-23
MY181510A (en) 2020-12-24
US10701773B2 (en) 2020-06-30
JP2019510372A (ja) 2019-04-11
DE102016104440A1 (de) 2017-09-14
KR102132549B1 (ko) 2020-07-09

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