EP3085202A1 - Pilote de diode électroluminescente permettant de consulter une information d'un module de diode électroluminescente - Google Patents

Pilote de diode électroluminescente permettant de consulter une information d'un module de diode électroluminescente

Info

Publication number
EP3085202A1
EP3085202A1 EP14808666.3A EP14808666A EP3085202A1 EP 3085202 A1 EP3085202 A1 EP 3085202A1 EP 14808666 A EP14808666 A EP 14808666A EP 3085202 A1 EP3085202 A1 EP 3085202A1
Authority
EP
European Patent Office
Prior art keywords
circuit
transformer
led module
led
coding
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.)
Granted
Application number
EP14808666.3A
Other languages
German (de)
English (en)
Other versions
EP3085202B1 (fr
Inventor
Frank Lochmann
Patrick MARTE
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.)
Tridonic GmbH and Co KG
Original Assignee
Tridonic GmbH and Co KG
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 Tridonic GmbH and Co KG filed Critical Tridonic GmbH and Co KG
Publication of EP3085202A1 publication Critical patent/EP3085202A1/fr
Application granted granted Critical
Publication of EP3085202B1 publication Critical patent/EP3085202B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • 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
    • H05B45/14—Controlling the intensity 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]
    • H05B45/30—Driver circuits
    • H05B45/355—Power factor correction [PFC]; Reactive power compensation
    • 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]
    • H05B45/382—Switched mode power supply [SMPS] with galvanic isolation between input and output
    • 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]
    • H05B45/385—Switched mode power supply [SMPS] using flyback topology
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/175—Controlling the light source by remote control
    • H05B47/185—Controlling the light source by remote control via power line carrier transmission
    • 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]
    • H05B45/375—Switched mode power supply [SMPS] using buck topology

Definitions

  • the present invention relates to a module for the
  • Illuminant path preferably at least one LED, and a driver for supplying or operating the module.
  • Identification element may be provided a coding resistor in the LED module.
  • the LED driver connected to the LED module puts a voltage over it
  • the self-adjusting current cut through the coding resistor is measured, so as to bring information regarding the target current of the associated LED module in experience.
  • Secondary side of the SELV barrier (safety extra low voltage barrier) must be returned to the primary side. In particular, it is necessary to return the measured parameter via such a SELV barrier. This feedback of information from the secondary side of the SELV barrier to the primary causes one
  • Reading information from an LED module comprising the steps:
  • the electrical parameter of the circuit can be e.g. be the current through the circuit or the value of the resistor or the impedance of the circuit.
  • Primary side of the transformer can be detected e.g. a timing parameter, such as the frequency and / or duty cycle, of the clocked transmitter.
  • the secondary side the LED module associated circuit when concerns the defined
  • the electrical parameter of the circuit can on the secondary side of the transformer information from a functionally connected to the LED module sensor
  • the secondary side circuit can be at
  • the circuit may comprise an intelligent circuit that generates defined load changes, and / or an ohmic resistance.
  • the voltage at the circuit can be detected indirectly, for example by means of a measuring winding coupled to the secondary side of the transformer, on the primary side of the transformer.
  • Reading the value of a coding resistor of an LED module comprising the steps:
  • Secondary side of a transformer is arranged such that a defined voltage is applied to the Kodierwiderstand, and
  • Coding resistance based on a parameter that is detected on the primary side of the secondary side of the transformer.
  • the transformer may be a primary side actively clocked transformer, such as, for example, a flyback converter.
  • the current through the coding resistor or the resistance value of the coding resistor can be determined on the basis of a timing parameter, for example the frequency and / or the
  • Timing parameter that adjusts to achieve the defined voltage on the coding resistor.
  • the voltage drop across the coding resistor can be any voltage drop across the coding resistor.
  • an LED converter which is designed to read out information from a connectable and powerable LED module, comprising:
  • the detection circuit may be designed to detect one, preferably a plurality of load changes of the secondary side, the LED module associated circuit.
  • Secondary side of the transformer may include information from a sensor operatively connected to the LED module reflected, for example, from a daylight, smoke or
  • the converter may be adapted to the
  • the voltage drop across the coding resistor can be any voltage drop across the coding resistor.
  • an LED converter designed to supply and read out the value of a coding resistor of an LED module is proposed
  • the transformer may be a transmitter clocked on the primary side by a control circuit by means of at least one switch, such as, for example, a flyback converter.
  • the voltage drop across the coding resistor can be any voltage drop across the coding resistor.
  • Fig. 1 shows a schematic representation of a
  • FIG. 2 shows a schematic representation of a
  • Fig. 3 shows a relationship between the current
  • Fig. 4 shows a schematic representation of a
  • FIG. 5 shows an inventive LED module with an intelligent circuit for execution
  • Fig. 6 shows an embodiment of a
  • inventive intelligent circuit for carrying out load changes.
  • the LED lighting system 1 comprises an LED module 2 comprising LEDs and an LED driver 3 for operating the LED
  • the LED lighting system 1 also has a supply unit 7, which preferably has an input voltage Ve,
  • This input voltage Ve is a filter and
  • Rectifier unit 8 which preferably the input voltage Ve by means of e.g. at least one capacitor filters.
  • the filter and rectifier unit 8 comprises a rectifier, e.g. in form of
  • Bridge rectifier for carrying out a rectification of the preferably filtered input voltage Ve.
  • the rectified input voltage Ve is then an active clocked power factor correction or PFC (Power Factor Correction) circuit 9 of
  • the output voltage of the supply unit 7 is a DC voltage, which is also identified as bus voltage Vbus.
  • Bus voltage Vbus is known to have a substantially constant voltage with a small ripple compared to the amplitude of the bus voltage Vbus.
  • the supply unit 7 may comprise another converter for generating a bus voltage Vbus instead of the PFC circuit 9.
  • the supply unit 7 can optionally also have a further insulation unit (not shown), which essentially has the function of insulation or galvanic isolation and, for this purpose, as a galvanic separation element, e.g. includes a transformer.
  • This isolation unit preferably has a transformer topology with galvanic isolation according to e.g.
  • the bus voltage Vbus which may alternatively also be a constant battery voltage, supplies the LED driver 3, which is connected to the LED module 2 via three connections or pins A / LED +, A / Rset and A / LED.
  • the LED module 2 includes three terminals LED +, LEDset and LED-, which are connected to the three terminals of the LED driver 3, respectively. Through the connection between the terminals A / LED, LED- a common ground for the LED driver 3 and the LED module 2 is provided.
  • the terminals A / LED +, LED + are connected via a line, so that LEDs 4 of the LED module 2, starting from the LED driver 3 with power
  • the LEDs 4 are preferably arranged between the terminals LED + and LED- as an LED track.
  • the LEDs 4 can be connected in series or in parallel between the terminals LED + and LED-. Alternatively, a configuration with several in parallel
  • the LED module 2 may also have only one LED.
  • the LEDs 4 can all be of the same type and in particular emit the same color, such as white. Also, the LEDs of the LED module can emit different colors, which together give, for example, a white mixed light.
  • the LED module 2 further comprises a coding circuit 6, which is provided between the terminals LEDset and LED-.
  • a coding circuit 6 which is provided between the terminals LEDset and LED-.
  • Coding circuit 6 from a coding resistor Rset.
  • the coding circuit 6 may be a passive circuit. As can be seen from Fig. 1, the LED track and the
  • Coding circuit 6 each with ground LED switched and connected in parallel.
  • Fig. 1 it is shown how at the coding circuit 6 between the terminals A / Rset and A / LED- a voltage of e.g. 5 volts is applied.
  • the output current at the A / Rset connector too
  • the coding circuit 6 encodes a
  • This information preferably relates to the LED module 2 and serves to identify the LED module 2. By reading this information, the LED driver 3 is then able to the connected LED module 2 to
  • the information coded in the coding circuit 6 can define the designation of the LED module 2 or the color generated thereby.
  • the information transmitted via the coding circuit 6 can be
  • an operating parameter for the LED module 2 such as a desired current or rated current or a nominal power or rated power for the LED module 2.
  • Die the invention is based in particular on the assumption that a coding circuit 6 or a coding resistor Rset is provided on the LED module whose resistance value is the same
  • the LED driver receives this information and regulates the current or power for the LED module 2 accordingly.
  • Fig. 1 the circuit of a compensation unit 5 is shown inside the LED module 2, e.g. between the two terminals LED + and LEDset.
  • This compensation unit 5 is suitable for influencing the value of the operating parameter coded by the coding circuit 6 or
  • the compensation unit 5 can influence the encoded desired current depending on the ambient temperature of the LED module such that, when the ambient temperature is too high, the nominal current read by the LED driver 3 for the LEDs is lowered. This measure, which is called “thermal derating”, can cause premature aging of the LEDs that are too high
  • This compensation unit 5 is
  • No such compensation unit 5 is provided between the terminals LED + and LEDset.
  • Fig. 2 shows a schematic representation of a
  • an LED converter 20 which is arranged in the LED driver 3 and is responsible for reading out information from the LED module 2 or from the coding circuit 6.
  • the current Iset is the current at the output A / Rset or the current through the coding resistor Rset. Alternatively, the value of the electric
  • Resistance of the coding resistor Rset represent the coding size.
  • the flyback converter is exemplified here for a transformer.
  • Voltage Vset can alternatively be generated by another clocked isolated power supply.
  • the flyback converter 21 comprises a primary winding PI, which is coupled to a secondary winding S1.
  • Primary winding PI is in series with a switch Q1, e.g. is designed as a transistor or as a MOSFET, connected.
  • the switch Ql is connected to a primary side ground.
  • a voltage pLVPS On the series circuit consisting of the primary winding PI and the switch Ql is applied to a voltage pLVPS.
  • This voltage pLVPS is preferably a DC voltage in the form of e.g. a low voltage bwz. a low voltage, starting from the in Fig. 1
  • bus voltage Vbus can be generated.
  • the secondary winding Sl is connected on the one hand to the connection A / LED, which is a secondary-side ground Are defined. On the other hand, the secondary winding Sl is connected via a diode Dl to the terminal A / Rset.
  • the flyback converter has another on the secondary side
  • the operation of the flyback converter is known per se.
  • the switch Ql of the flyback converter is alternating and by means of a control signal FLB
  • a conducting phase with the switch Q1 closed is followed by a blocking phase with the switch Q1 open, and so on.
  • the resistor Rset is arranged on the secondary side of this clocked potential-separated power supply in the form of a flyback converter.
  • Coding resistance Rset plays.
  • This winding P2 is arranged on the primary side. Parallel to the further winding P2, a resistor R2 is arranged, as well as a
  • the voltage Vset at the coding resistor Rset is regulated to a defined voltage value of eg 5 volts by a control unit 23.
  • the control unit 23 receives, as feedback information, the voltage at the terminal ADC, which represents the voltage Vset.
  • the output voltage Vset can be changed become. For example, the voltage Vset is through
  • Control unit 23 responsible.
  • the voltage Vset is kept constant at the defined value.
  • Coding resistor Rset is assigned. Alternative to
  • Frequency f can also be used the duty ratio tv of the clocking of the switch Ql or the duty cycle tv of the control signal FLB.
  • the invention offers the possibility to bring information from the secondary side of the SELV barrier or the galvanic isolation on the primary side in experience, without affecting an optocoupler or
  • the relationship between the timing parameter - frequency f and / or the duty cycle tv of the control signal FLB - and the coding size may e.g. by means of a stored in the LED driver 3 or in the control unit 23 look-up
  • the defined voltage for the voltage Vset across the coding circuit may be 5 volts.
  • the range for the value of the coding resistor Rset is e.g. from lkQ to 100 kQ. This gives a range for the current Iset of 5mA to 50 ⁇ . The relationship between the current Iset and the value of the coding resistor is shown in FIG.
  • the resistance Rset is determined based on the frequency f of the control signal FLB.
  • the following table is an example of a corresponding look-up table:
  • the supply circuit Vset formed by the LED converter 20 can also be used for other purposes in the LED driver 3 as a low-voltage supply.
  • the optional compensation unit 5 of Fig. 1 may e.g. a thermistor whose resistance changes with temperature.
  • a thermistor whose resistance changes with temperature.
  • Thermistor or NTC (Negative Temperature Coefficient) Resistor preferably ensures that the current through the coding circuit 6 changes.
  • the compensation unit 5 may be e.g. at high ambient temperatures the detection of the
  • Detection circuit 22 does not detect about the resistance of the connected coding circuit 6, but a changed resistance, the lower
  • Fig. 4 shows a schematic representation of a
  • the LED converter 40 is part of the LED driver. 3
  • the LED converter 40 includes a switching regulator, eg
  • the half-bridge converter is supplied by the bus voltage Vbus shown in FIG.
  • the switches of the half-bridge can be configured as transistors, eg FET or MOSFET.
  • the LLC converter comprises a series circuit of a capacitor Cl a
  • Inductance LI ⁇ and a primary winding PI ⁇ a galvanic lock or a transformer The
  • Capacitance Cl ⁇ and the inductance LI ⁇ form an LC resonant circuit.
  • a secondary winding S1 A is provided, which is coupled to the primary winding PI ⁇ and which is connected to a diode Dl ⁇ .
  • Secondary winding S1 A is also connected to a secondary side ground sGND.
  • the cathode of the diodes Dl ⁇ is connected to the terminal A / LED + shown in FIG.
  • the connection A / LED- is connected to the secondary side ground sGND.
  • the LED module 2 can be connected to the connections A / LED + and A / LED- and can be supplied.
  • a desired current for the LED module 2 are generated.
  • This desired current is preferably the current coded by the coding circuit 6.
  • a look-up table in the LED driver is provided, for a certain coding size - eg a certain value of resistance Rset - one
  • Control unit 23 are returned. Other known
  • the LEDs of the LED module 2 can be operated with other converters known per se and supplied with power. It is conceivable, e.g. the use of a flyback converter, or a buck converter. Since a Buck converter has no galvanic isolation is
  • FIG. 1 insulation unit preferably provided with the use of a buck converter mentioned in connection with FIG. 1 insulation unit.
  • the LED converter 20 for reading the information and the LED converter 40 for supplying the LEDs are operated independently of each other. This is advantageous in that the reading of the information has no effect on the
  • a digital coding of characteristic values of the LED module can also take place in that instead of or in addition to
  • Encoding resistor Rset is an intelligent circuit 50 provided on the secondary side.
  • the smart circuit 50 is preferably connected between the LEDset and LED terminals.
  • intelligent circuit such as from the control unit 23, according to a predefined protocol interpret as multiple information, for example in the sense of a coding resistor for the nominal current of the LED module.
  • Coding is again decoded by the control unit.
  • this digital information may also include sensor information, such as
  • a sensor 51 is provided, the measured values to the
  • intelligent circuit 50 forwards, which in turn transmits the measured values or information derived therefrom to the primary side or to the control unit 23 in accordance with the digital coding by means of load jumps.
  • Fig. 6 shows an embodiment of a
  • Smart circuit 50 according to the invention. Only one intelligent circuit 50 is connected between the connections LEDset and LED of the LED module in this exemplary embodiment. Alternatively, parallel to the
  • the intelligent circuit 50 a coding resistor Rset be provided.
  • the smart circuit 50 includes a first one
  • the smart circuit 50 also includes logic (not shown) that is configured to turn either the first switch S60 on and off the second switch S61, or vice versa, the first switch S60 off and the second switch S61
  • the smart circuit 50 may have two different resistance values, and thus perform load jumps and binary digital coding.
  • a further embodiment is that over the interface shown, selectively discrete voltage levels can be generated on the secondary side, wherein in the
  • an intelligent circuit 50 in the sense of a digital Protocol by load changes jumps information.

Landscapes

  • Circuit Arrangement For Electric Light Sources In General (AREA)
  • Dc-Dc Converters (AREA)

Abstract

L'invention concerne un procédé permettant de consulter une information d'un module de diode électroluminescente (2). Ledit procédé comprend les étapes consistant à : - transmettre (21) avec séparation galvanique une puissance électrique à un circuit (6) sur le côté secondaire d'un transformateur, de telle manière qu'une tension définie est appliquée sur le circuit (6), le circuit (6) étant associé au module de diode électroluminescente (2), et - détecter indirectement un paramètre électrique du circuit (6) ou la variation dans le temps dudit paramètre sur la base d'un paramètre qui est détecté sur le côté primaire du transformateur (21).
EP14808666.3A 2013-12-20 2014-12-08 Pilote de del pour la lecture d'information provenant d'un module à del Active EP3085202B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013226964.1A DE102013226964A1 (de) 2013-12-20 2013-12-20 LED-Treiber zum Auslesen von Information eines LED-Moduls
PCT/EP2014/076908 WO2015091064A1 (fr) 2013-12-20 2014-12-08 Pilote de diode électroluminescente permettant de consulter une information d'un module de diode électroluminescente

Publications (2)

Publication Number Publication Date
EP3085202A1 true EP3085202A1 (fr) 2016-10-26
EP3085202B1 EP3085202B1 (fr) 2020-04-01

Family

ID=52011232

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14808666.3A Active EP3085202B1 (fr) 2013-12-20 2014-12-08 Pilote de del pour la lecture d'information provenant d'un module à del

Country Status (3)

Country Link
EP (1) EP3085202B1 (fr)
DE (1) DE102013226964A1 (fr)
WO (1) WO2015091064A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT15169U1 (de) * 2014-01-30 2017-02-15 Tridonic Gmbh & Co Kg Erfassung eines LED-Moduls
RU2656875C1 (ru) * 2015-04-24 2018-06-07 Филипс Лайтинг Холдинг Б.В. Модуль твердотельного освещения, цепь освещения и способы управления освещением
EP3259959B1 (fr) * 2015-04-24 2018-06-20 Philips Lighting Holding B.V. Module d'éclairage à l'état solide, circuit d'éclairage et procédés de commande d'éclairage
DE102016226016A1 (de) * 2016-12-22 2018-06-28 Osram Gmbh SCHALTUNGSANORDNUNG ZUM BETREIBEN VON LICHTQUELLEN UND SENSOR ZUM ANSCHLIEßEN AN EINE SCHALTUNGSANORDNUNG
FR3061624B1 (fr) * 2017-01-02 2020-11-13 Valeo Vision Gestion d'informations dans un module lumineux pour vehicule automobile comprenant des sources lumineuses a element semi-conducteur
FR3064148B1 (fr) * 2017-03-15 2021-07-16 Valeo Vision Dispositif et procede de pilotage de sources lumineuses d’un vehicule automobile
FI128615B (en) * 2018-10-02 2020-08-31 Helvar Oy Ab Method and device for controlling the output current of a driver device for semiconductor light sources
DE102020203531A1 (de) 2020-03-19 2021-09-23 Osram Gmbh Schaltungsanordnung zum betreiben einer leuchtmittel aufweisenden last

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2010326847A1 (en) 2009-12-04 2012-06-21 Osram Ag A method for controlling the operation of an electronic converter, and a corresponding electronic converter, lighting system and software product
KR101663834B1 (ko) * 2010-07-23 2016-10-07 엘지이노텍 주식회사 Ｌｅｄ 전원 장치
JP2012216766A (ja) * 2011-03-30 2012-11-08 Sanken Electric Co Ltd Ｌｅｄ駆動装置及びｌｅｄ照明装置
CN102361525B (zh) * 2011-07-19 2013-07-17 成都芯源系统有限公司 发光二极管电路及其方法
DE102012008502A1 (de) * 2012-04-26 2013-10-31 Tridonic Gmbh & Co. Kg Betriebsgerät für ein Leuchtmittel und Verfahren

Also Published As

Publication number Publication date
DE102013226964A1 (de) 2015-06-25
EP3085202B1 (fr) 2020-04-01
WO2015091064A1 (fr) 2015-06-25

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