EP1872624A1 - Module de diode electroluminescente et systeme d'eclairage a diodes electroluminescentes comprenant plusieurs modules de diode electroluminescente - Google Patents

Module de diode electroluminescente et systeme d'eclairage a diodes electroluminescentes comprenant plusieurs modules de diode electroluminescente

Info

Publication number
EP1872624A1
EP1872624A1 EP06722772A EP06722772A EP1872624A1 EP 1872624 A1 EP1872624 A1 EP 1872624A1 EP 06722772 A EP06722772 A EP 06722772A EP 06722772 A EP06722772 A EP 06722772A EP 1872624 A1 EP1872624 A1 EP 1872624A1
Authority
EP
European Patent Office
Prior art keywords
led
led module
module according
led chips
chips
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06722772A
Other languages
German (de)
English (en)
Inventor
Ulf Brune
Bernd-Heiner Scholz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Osram GmbH
Original Assignee
Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH filed Critical Patent Treuhand Gesellschaft fuer Elektrische Gluehlampen mbH
Publication of EP1872624A1 publication Critical patent/EP1872624A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21S—NON-PORTABLE LIGHTING DEVICES; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLE EXTERIORS
    • F21S41/00—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps
    • F21S41/10—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source
    • F21S41/14—Illuminating devices specially adapted for vehicle exteriors, e.g. headlamps characterised by the light source characterised by the type of light source
    • F21S41/141—Light emitting diodes [LED]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/0017—Devices integrating an element dedicated to another function
    • B60Q1/0023—Devices integrating an element dedicated to another function the element being a sensor, e.g. distance sensor, camera
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
    • F21V23/00—Arrangement of electric circuit elements in or on lighting devices
    • F21V23/04—Arrangement of electric circuit elements in or on lighting devices the elements being switches
    • F21V23/0442—Arrangement of electric circuit elements in or on lighting devices the elements being switches activated by means of a sensor, e.g. motion or photodetectors
    • 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]
    • 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
    • H05B45/12—Controlling the intensity of the light using optical feedback
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • 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
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • H05B45/3725—Switched mode power supply [SMPS]
    • H05B45/38—Switched mode power supply [SMPS] using boost topology

Definitions

  • the invention relates to an LED module according to the preamble of patent claim 1 and an LED lighting device with a plurality of such LED modules.
  • LED arrays are characterized by high efficiency, a long service life, a fast response time and a comparatively low sensitivity to shocks and vibrations. For this reason, LED arrays are increasingly being used in lighting devices in which incandescent lamps have often been used, in particular in motor vehicle headlamps.
  • the emitted light intensity should not deviate significantly from the light emitted at the time of commissioning light intensity, even after a relatively long period of operation, for example, after an operating time of several thousand hours.
  • the intensity of light emitted by the LED chips of an LED module may possibly at least decrease slightly with increasing operating time due to degradation phenomena.
  • Such a degradation effect can have a disturbing effect, in particular, when, in a LED lighting unit comprising a plurality of LED modules, a single LED module, for example due to a defect, has to be replaced after a comparatively long service life. On the one hand, it may happen that the light intensity of the replacement module deviates from the light intensity of the other modules, in particular if, in contrast to the other LED modules still has no age-related reduction in light intensity.
  • the technical function of the LED lighting device is generally not significantly affected by slight differences in the intensity of the individual LED modules, however, even slight differences can often be perceived by a viewer and possibly be distracting.
  • road traffic regulations must comply with the luminous intensity regulations.
  • LED modules are usually delivered in brightness groups.
  • the brightness of the individual LED modules is therefore measured after production and assigned to each LED module one of its brightness corresponding brightness group.
  • an LED lighting device which comprises several LED modules, advantageously only LED modules from the same brightness group are used.
  • EP 1 341 402 A2 discloses measuring the brightness of the radiation emitted by an LED module and transmitting the measurement signal to the power supply unit of the LED module. Module to control the flow of current through the LED module such that the brightness of the LED module is constant. In some applications of LED modules, the realization of such a control circuit but is associated with a relatively high technical complexity. Frequently, no separate power supply is provided for the operation of the LED module, to which a feedback of a measuring signal, such as the emitted brightness, could be done to control the power supply. This is the case, for example, when a LED module contained in a motor vehicle headlight is supplied with electrical voltage by a motor vehicle battery.
  • the invention has for its object to provide an improved LED module, which is characterized in particular by a high long-term stability of the emitted light intensity and a provision by which the replacement of the LED module is simplified by a similar LED module.
  • the control unit is arranged on a support of the LED module and comprises an electronic storage medium for storage according to at least one embodiment of the invention operating data of the LED chips, wherein a control of the operating current is provided in dependence on the stored operating data.
  • control unit for example a microcontroller, has a means for detecting the operating time of the LED chips, wherein the operating time is stored in the electronic storage medium.
  • the detection of the operating time of the LED chips of the LED array by the control unit allows in particular, the operating parameters of the LED module to the
  • the operating current of the LED chips is regulated by means of the control unit as a function of the operating time.
  • it is provided to increase the operating current of the LED chips with increasing operating time. In this way, a decrease in the brightness of the radiation emitted by the LED chips with increasing operating time due to degradation phenomena of the LED chips is counteracted.
  • the increase of the operating current is preferably carried out such that a predetermined minimum brightness is not exceeded.
  • the regulation of the operating current of the LED chips takes place such that the brightness of the emitted radiation is at least approximately constant. This advantageously achieves that differences in the brightness of otherwise identical LED modules, which differ from one another through the operating life of the LED chips, are imperceptible.
  • the increase in the operating current of the LED chips is preferably carried out at preset times stored in the control unit.
  • the increase in the operating current may occur after predetermined time intervals of the operating time.
  • the time intervals after which the operating current is increased need not necessarily be the same length.
  • the current must not necessarily be increased by the same amount after the predetermined time intervals. Rather, the determination of the time intervals, according to which an increase in the current intensity takes place, and the determination of the amount of the respective increase in the current strength advantageously based on empirical data for Degradations the LED chips.
  • the operating data stored in the electronic storage medium can, for example, be further processed by the control unit in order to regulate the operating current as a function of the previous operating data.
  • the stored operating data from the control unit may be used to determine the time intervals according to which the
  • Operating current to compensate for degradation phenomena is to be increased, or the amounts of the respective increase in the current intensity can be used.
  • the operating time and other operating parameters can be stored in the memory of the control unit and used for such calculations.
  • LED modules in which an operation of the LED chips of the LED array is provided in several operating modes with different operating currents also storing the operating times in the individual operating modes. For example, in an LED module used in a vehicle headlamp, operation of the LED chips having different current levels may be provided in the parking, low beam or high beam modes.
  • a brightness grouping of the LED chips is advantageously stored in the electronic storage medium of the control unit.
  • a brightness grouping is understood to be an indication of the brightness at a reference current intensity.
  • the current required to achieve a given brightness may vary at least slightly even with otherwise similar chips. For this reason, LEDs are usually in so-called
  • the storage of the brightness grouping in the electronic Storage medium of the control unit of the LED module has the advantage that the operating current of the LED chips can be automatically controlled based on this information to the value required for a given brightness value.
  • the LED module can thus advantageously be used without regard to the brightness grouping in addition to other similar LED modules, without causing differences in brightness occur.
  • the LED module preferably has an interface for reading out the stored operating data and / or for programming the control unit.
  • a preferred embodiment of the invention is a serial interface.
  • Lighting device comprising a plurality of similar LED modules, the operating time of the LED module to be replaced are read out and thus in the LED module, which is to replace the LED module to be replaced, the operating current for adjusting the brightness to the other LED modules are set ,
  • the support of the LED module is preferably a circuit board, for example a metal core board.
  • the width of the carrier is 12 mm or less in a preferred embodiment.
  • the carrier acts as a heat sink for the heat generated by the LED chips.
  • the carrier preferably contains at least one electrical connection point, by means of which in particular the control device can be electrically contacted. As a connection point, for example, a plug is provided.
  • the electrical connection of the arranged on the support elements of the LED module, in particular the control unit with the LED chips, preferably via conductor tracks on the carrier body.
  • the power supply of the LED module can be done both with DC voltage and AC voltage.
  • the LED module is operated at a supply voltage of between 8 V and 24 V inclusive.
  • the supply voltage may be the voltage of a motor vehicle battery, which is for example about 12 V.
  • a means for transforming the supply voltage to the operating voltage provided for operating the LED array is contained on the carrier of the LED module.
  • the operating voltage of the LED array depends in particular on the number of LED chips used, which are preferably connected in series, and is for example 18.5 V or less.
  • the transformation of the supply voltage to the operating voltage for example, with a boost converter, which is arranged on the support of the LED module.
  • the transformation of the supply voltage to the operating voltage of the LED array by an element arranged on the carrier has the particular advantage that the LED module can be connected directly to the supply voltage, for example a battery voltage in a motor vehicle, without further precautions.
  • the LED chips of the LED array are preferably mounted on a chip carrier which is mounted on the carrier.
  • the carrier and the chip carrier are preferably glued together.
  • the chip carrier is made, for example, of a ceramic, preferably AlN.
  • the chip carrier is a heat sink for the heat emitted by the LED chips.
  • the LED chips preferably contain a III-V
  • III-V compound semiconductor material in particular In x AlyGa] __ x _yN, In x AlyGai_ x _yP or In x AlyGa] __ x _yAs, each with ⁇ £ x £ l, ⁇ £ y £ l and x + y £ l.
  • the III-V compound semiconductor material does not necessarily have to have a mathematically exact composition according to one of the above formulas. Rather, it may have one or more dopants as well as additional ingredients that do not substantially alter the physical properties of the material.
  • the above formulas contain only the essential constituents of the crystal lattice, even if these may be partially replaced by small amounts of other substances.
  • the LED chips are so-called thin-film light-emitting diode chips in which a functional semiconductor layer sequence was first grown epitaxially on a growth substrate, then a new support was applied to the surface of the semiconductor layer sequence opposite the growth substrate and subsequently the growth substrate was separated. This has the particular advantage that the growth substrate can be reused.
  • a thin-film light-emitting diode chip is, to a good approximation, a Lambert surface radiator and is therefore particularly well suited for use in a headlight.
  • a preferred embodiment of the LED module includes a temperature sensor and is a control of an operating current the LED chips in response to a temperature detected by the temperature sensor provided.
  • the temperature sensor is connected to the control unit, for example by conductor tracks on the carrier. Due to the temperature-dependent regulation of the operating current of the LED chips of the LED array, impairment of the function or even failure of the LED chips due to thermal overloading can be avoided.
  • the temperature detected by the temperature sensor can be evaluated by the control unit, and the operating current of the LED chips can be reduced as soon as the temperature detected by the temperature sensor reaches a critical value. In this way, the LED chips can be advantageously operated over long periods of operation in the limit of their thermal capacity.
  • the temperature monitoring by means of the temperature sensor is particularly advantageous if the LED array contains a plurality of LED chips, since with the number of LED chips and the heat generation increases.
  • the LED array includes at least four LED chips.
  • the LED array may have six LED chips.
  • the temperature sensor is, for example, an NTC or PTC resistor, a semiconductor device or a thermocouple.
  • the temperature sensor is preferably mounted on the chip carrier.
  • the temperature sensor can also be arranged on the carrier.
  • the attachment of the temperature sensor on the chip carrier or on the carrier is preferably carried out by soldering or gluing. To get the best possible match between the of the
  • Temperature sensor detected temperature and the temperature of the radiation-emitting active layers of the LED chips to achieve, it is advantageous if the temperature sensor has the smallest possible distance to at least one of the LED chips.
  • the distance between the temperature sensor and at least one LED chip of the LED array is 5 mm or less, more preferably 3 mm or less.
  • the LED module contains a light detector, for example a photodiode.
  • a control of the operating current of the LED chips is provided by the control unit in dependence on a light intensity measured by the light detector.
  • the light detector is preferably connected to the control unit, for example via conductor tracks on the carrier.
  • the light detector is arranged such that it receives at least a portion of the radiation emitted by the LED chips, for example scattered radiation.
  • the signal of the light detector can be evaluated by the control unit such that the brightness emitted by the LED chips is regulated to a predetermined value by means of a setpoint / actual value comparison.
  • the light detector is suitable for detecting the ambient brightness.
  • the light detector is preferably arranged and / or aligned such that it primarily detects light from outside the LED module. In this case, advantageously at least only a small part of the radiation emitted by the LED chips of the LED module strikes the light detector.
  • An ambient light intensity dependent signal provided by the light detector to the control unit may be provided by the Control unit are used in particular to the
  • the signal of the light detector can also be evaluated by the control unit to effect an automatic switch-on or switch-off process.
  • an automatic switch-on process can be effected with reduced ambient brightness, for example when entering a tunnel or when twilight sets in.
  • At least one beam-shaping optical element is arranged downstream of the LED chips of the LED array in its emission direction.
  • the divergence of the radiation emitted by the LED chips is reduced by the beam-shaping optical element.
  • the beam-shaping optical element is preferably a hollow body with a light inlet opening facing the LED chip and a light exit opening opposite the light entry opening, at least part of the radiation emitted by the LED chip (s) being reflected on a wall of the hollow body towards the light exit opening.
  • the beam-shaping optical element can be, for example, a hollow body filled with a potting material.
  • the potting material is preferably a UV-stable material, such as silicone.
  • a wall of the hollow body preferably has a curvature in order to realize a desired optical functionality.
  • the wall of the hollow body can be aspherical, for example parabolic, elliptical or hyperbolic, curved.
  • the beam-shaping optical element is designed as a CPC, CEC or CHC-like optical concentrator, which here and hereinafter means a concentrator whose reflective side surfaces at least partially and / or at least largely the shape of a composite parabolic Compound Parabolic Concentrator (CPC), Compound Elliptic Concentrator (CEC) or Compound Hyperbolic Concentrator (CHC).
  • CPC Compound Parabolic Concentrator
  • CEC Compound Elliptic Concentrator
  • CHC Compound Hyperbolic Concentrator
  • the surface of the cover body facing the LED chips is the actual concentrator output, so that radiation, in comparison with the conventional use of a concentrator for focusing, runs in the reverse direction through it and is thus not concentrated, but rather the cover body with reduced divergence through the opposite one Surface leaves.
  • An LED lighting device comprises several of the previously described LED modules.
  • An LED module according to the invention may in particular be part of a motor vehicle headlamp, wherein the motor vehicle headlamp advantageously contains a plurality of such LED modules. The invention will be described below with reference to a
  • Figure 1 is a schematic plan view of an embodiment of an LED module according to the invention.
  • Figure 2 is a schematic representation of a cross section along the line I-II of the embodiment of the invention shown in Figure 1.
  • FIGS. 1 and 2 The exemplary embodiment of an LED module 11 according to the invention shown schematically in FIGS. 1 and 2 contains an LED array in which six LED chips 2 are mounted on a common chip carrier 1.
  • the LED chips 2 have an active zone, which is preferably a III-V compound semiconductor material, in particular In x AlyGa] __ ⁇ -yN, In x AlyGa] __ X _ V P or In x AlyGa ] __ x _yAs with (K x
  • the active zone may be in the form of a single heterostructure, a double heterostructure, a single quantum well structure or a multiple quantum well structure in which charge carriers undergo quantization of their energy states by confinement, in particular the term quantum well structure does not include any information about the dimensionality of the quantization Quantum wells, quantum wires and quantum dots and each
  • the chip carrier 1 is preferably made of a ceramic.
  • the chip carrier 1 may contain AlN.
  • the LED chips 2 of the LED array are preferably connected in series. Alternatively, the LED chips 2 can also be connected in parallel.
  • the LED module 11 has a carrier 4, on which in particular the chip carrier 1 with the LED chips 2 is mounted.
  • the carrier 4 preferably has a width b of 12 mm or less.
  • the carrier 4 may be a metal core board, which advantageously functions as a heat sink for the heat generated by the LED chips 2, the heat generated by the LED chips 2 being emitted via the chip carrier 1 to the metal core board 4. Holes can be provided in the carrier 4 in order to mount the LED module in a lighting device, for example by means of screws or dowel pins.
  • control unit 7 On the support 4 of the LED module 11, a control unit 7 is further arranged.
  • the control unit 7 is, for example, an electronic chip, which is preferably mounted on the carrier 4 in flip-chip technology.
  • the control unit 7 advantageously has an electronic storage medium 8 for storing operating data of the LED chips 2.
  • the operating current of the LED chips 2 is regulated by the control unit 7 as a function of the stored operating data.
  • control unit 7 has a means for detecting the operating time of the LED chips 2, wherein the operating time in the electronic storage medium. 8 is stored and the operating current of the LED chips 2 in
  • the regulation of the operating current of the LED chips 2 as a function of the operating time is preferably carried out such that the operating current is increased with increasing operating time to a decrease in brightness due to
  • Degradation phenomena of LED chips 2 counteract. In this way, it can be achieved, in particular, that the brightness of the radiation emitted by the LED chips 2 deviates, at least not substantially, from an initial value at the time of starting up, even after a long operating time of, for example, several thousand hours.
  • the brightness of the radiation emitted by the LED module 11 is therefore advantageously constant over time. For example, it may be provided that a luminous flux of 400 Im is maintained.
  • the time points at which the operating current intensity of the LED chips 2 for compensating for aging phenomena of the LED chips is increased in each case are preferably stored in the electronic storage medium 8 of the control unit 7.
  • An increase in the operating current thus takes place automatically when the detected and summed by the control unit 7 operating time of the LED chips 2 coincides with the preset times.
  • the amount of the increase and the time intervals after which an increase takes place are advantageously determined from empirical values for the aging behavior of the LED chips 2, for example from a measured progression of the light intensity as a function of time.
  • stepwise increase in the operating current may alternatively be a continuous Increasing the operating current as a function of the
  • Operating duration of the LED chips 2 may be provided.
  • a brightness grouping of the LED chips 2 is advantageously stored in the electronic storage medium 8 of the control unit 7. This has the particular advantage that the operating current of the LED chips 2 can be automatically controlled by the control unit 7 on the basis of this information to the value required for a given brightness. As a result, there are advantageously no discernible differences in the brightness when the LED module 11 is arranged next to other similar LED modules.
  • control unit 7 advantageously has an interface (not shown).
  • the interface may be a serial interface.
  • a programming of the control unit 7 can also take place via the serial interface.
  • a plug 6 is provided.
  • an AC voltage for example a mains voltage
  • a DC voltage for example a battery voltage, in particular a battery voltage of a motor vehicle battery
  • electronic components required for this purpose for example a choke coil 9 and a capacitor 10, can be arranged on the carrier 4.
  • a choke coil 9 and a capacitor 10 can be arranged on the carrier 4.
  • Temperature sensor 3 is arranged, which is connected to the control unit 7.
  • the temperature sensor 3, for example, a temperature-dependent resistor, a thermocouple or a semiconductor device with temperature-dependent properties, is in thermal contact with the LED chips 2, for example by conduction or convection.
  • the temperature sensor serves to cause a reduction in the operating current of the LED chips 2 by the control unit 7 when a critical temperature is exceeded.
  • the LED module 11 preferably contains a light detector 5, which is arranged, for example, on the chip carrier 1 and connected to the control unit 7.
  • the light detector 5 is arranged, for example, on the chip carrier 1 in order to receive at least part of the radiation emitted by the LED chips 2.
  • the signal of the light detector 5 is evaluated by the control unit 7 in such a way that the brightness emitted by the LED chips 2 is regulated to a predetermined value by a setpoint / actual value comparison.
  • the light detector 5 could also be mounted elsewhere on the carrier 4, for example to receive the ambient brightness or at least a portion of the radiation emitted by any adjacent LED modules present.
  • the signal generated by the light detector 5 can be evaluated by the control unit 7 such that the operating current of the LED chips 2 is controlled such that the light intensity emitted by the LED module 11 is adapted to the ambient light conditions.
  • at least one optical element 12 is advantageously provided.
  • an optical element 12 may be provided which reduces the divergence of the radiation emitted by the LED chips 2.
  • the optical element 12 may be a non-imaging optical concentrator, which is preferably arranged very close to the LED chips 2 or even placed thereon.
  • the non-imaging optical concentrator is preferably a CPC, CEC, or CHC-type optical concentrator whose reflective sidewalls are at least partially and / or at least substantially in the form of a compound parabolic concentrator (CPC) composite elliptical concentrator (Compound elliptic concentrator, CEC) and / or a compound hyperbolic concentrator (CHC).
  • CPC compound parabolic concentrator
  • CHC compound hyperbolic concentrator
  • the invention is not limited by the description with reference to the embodiments. Rather, the invention encompasses any novel feature as well as any combination of features, which in particular includes any combination of features in the patent claims, even if this feature or combination itself is not explicitly stated in the patent claims or exemplary embodiments.
  • a plurality of LED arrays and a plurality of control devices 7 may be arranged on the carrier 4.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Optics & Photonics (AREA)
  • Led Devices (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Lighting Device Outwards From Vehicle And Optical Signal (AREA)

Abstract

La présente invention concerne un module de diode électroluminescente (11) comprenant un réseau de diodes électroluminescentes qui est constitué de plusieurs puces de diode électroluminescente (2) et d'une unité de commande (7) conçue pour réguler un courant de fonctionnement des puces de diode électroluminescente (2). Selon cette invention, l'unité de commande (7) se trouve sur un support (4) du module de diode électroluminescente (11) et présente une mémoire électronique conçue pour enregistrer des données de fonctionnement des puces de diode électroluminescente (2). La régulation du courant de fonctionnement s'effectue en fonction des données de fonctionnement enregistrées.
EP06722772A 2005-04-19 2006-04-10 Module de diode electroluminescente et systeme d'eclairage a diodes electroluminescentes comprenant plusieurs modules de diode electroluminescente Withdrawn EP1872624A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005018175A DE102005018175A1 (de) 2005-04-19 2005-04-19 LED-Modul und LED-Beleuchtungseinrichtung mit mehreren LED-Modulen
PCT/DE2006/000635 WO2006111133A1 (fr) 2005-04-19 2006-04-10 Module de diode electroluminescente et systeme d'eclairage a diodes electroluminescentes comprenant plusieurs modules de diode electroluminescente

Publications (1)

Publication Number Publication Date
EP1872624A1 true EP1872624A1 (fr) 2008-01-02

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06722772A Withdrawn EP1872624A1 (fr) 2005-04-19 2006-04-10 Module de diode electroluminescente et systeme d'eclairage a diodes electroluminescentes comprenant plusieurs modules de diode electroluminescente

Country Status (7)

Country Link
US (1) US20090021181A1 (fr)
EP (1) EP1872624A1 (fr)
JP (1) JP2008537344A (fr)
KR (1) KR20080005279A (fr)
CN (1) CN100531493C (fr)
DE (1) DE102005018175A1 (fr)
WO (1) WO2006111133A1 (fr)

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WO2016197166A1 (fr) * 2015-06-09 2016-12-15 Zkw Group Gmbh Procédé permettant d'équiper un support de circuit dans une position précise

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Publication number Priority date Publication date Assignee Title
DE102004047682A1 (de) * 2004-09-30 2006-04-06 Patent-Treuhand-Gesellschaft für elektrische Glühlampen mbH LED-Array
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KR20080005279A (ko) 2008-01-10
US20090021181A1 (en) 2009-01-22
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JP2008537344A (ja) 2008-09-11
CN100531493C (zh) 2009-08-19
CN101164378A (zh) 2008-04-16

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