WO2015113090A1 - Détection d'un module led - Google Patents

Détection d'un module led Download PDF

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Publication number
WO2015113090A1
WO2015113090A1 PCT/AT2015/050024 AT2015050024W WO2015113090A1 WO 2015113090 A1 WO2015113090 A1 WO 2015113090A1 AT 2015050024 W AT2015050024 W AT 2015050024W WO 2015113090 A1 WO2015113090 A1 WO 2015113090A1
Authority
WO
WIPO (PCT)
Prior art keywords
circuit
transformer
led module
converter
led
Prior art date
Application number
PCT/AT2015/050024
Other languages
German (de)
English (en)
Inventor
Patrick MARTE
Original Assignee
Tridonic Gmbh & 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 & Co Kg filed Critical Tridonic Gmbh & Co Kg
Priority to DE112015000558.7T priority Critical patent/DE112015000558A5/de
Publication of WO2015113090A1 publication Critical patent/WO2015113090A1/fr

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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]
    • H05B45/10—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]
    • H05B45/30—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
    • 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]
    • H05B45/39—Circuits containing inverter bridges
    • 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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/56—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving measures to prevent abnormal temperature of the LEDs
    • 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
    • H05B47/18—Controlling the light source by remote control via data-bus transmission
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
    • H02M3/00—Conversion of dc power input into dc power output
    • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
    • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
    • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
    • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
    • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/33538—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type
    • H02M3/33546—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type with automatic control of the output voltage or current
    • H02M3/33553—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only of the forward type with automatic control of the output voltage or current with galvanic isolation between input and output of both the power stage and the feedback loop
    • 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
    • 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

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 be on the
  • 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 information from an LED module comprising the steps:
  • the electrical parameter of the circuit is the current through the circuit or the value of the resistor or the impedance of the circuit.
  • a method for reading out the value of a coding resistor of an LED module comprising the steps: electrically transferring an electrical power to the coding resistor which is on the
  • 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.
  • 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 invention also relates to a readout converter adapted to read information from a connectable and powerable LED module, comprising:
  • a transformer for galvanically transmitting an electrical parameter to a circuit associated with the LED module, based on the
  • 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 transformer.
  • 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 can reproduce information from a functionally connected to the LED module sensor, for example.
  • a functionally connected to the LED module sensor for example.
  • a functionally connected to the LED module sensor for example.
  • 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 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.
  • the invention proposes an LED driver comprising an LED converter described above for reading information from a connectable LED module, and an LED converter for supplying the LEDs de connectable LED module.
  • 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 detection circuit according to the invention and the resistance value of the detection circuit
  • Fig. 5 shows an inventive LED module with an intelligent circuit for executing
  • Fig. 6 shows an embodiment of a
  • Fig. 7 shows a schematic representation of a
  • the LED lighting system 1 comprises an LED module 2 'LEDs and an LED driver 3 for operating the LED module 2.
  • the LED lighting system 1 additionally has a supply unit 7, which preferably has an input voltage Ve,
  • This input voltage Ve is a filter and
  • Rectifier unit 8 is supplied, which preferably filters the input voltage Ve by means of, for example, at least one capacitor.
  • the filter and rectifier unit 8 comprises a rectifier, for example in the form of a
  • 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 can alternatively also be a constant battery voltage, supplies the LED driver 3, which has three terminals or pins A / LED +, A / Rparam. and A / LED is connected to the LED module 2.
  • the LED module 2 comprises three connections LED +, Led-param. and LED, which are connected to the three terminals of the LED driver 3, respectively. About the connection between the
  • Terminals A / LED, LED will be a common ground for the LED driver 3 and the LED module 2 are 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 can be operated 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, e.g. White. Also, the LEDs of the LED module may have different colors, which together may e.g. give a white mixed light, radiate.
  • the LED module 2 further comprises a coding circuit 6, which between the terminals Led param. and LED is provided.
  • the coding circuit 6 consists of a coding resistor Rparam ..
  • the coding circuit 6 may be a passive circuit. As can be seen from FIG. 1, the LED path and the coding circuit 6 are each connected to ground with LED and connected in parallel to one another. In Fig. 1 is shown as at the coding circuit 6 between the terminals
  • a / Rparam. and A / LED a voltage of e.g. 5 volts
  • the output current at terminal A / Rparam. which also preferably corresponds to the current through the coding circuit 6, is Ilparam. characterized.
  • 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 e.g. a nominal current or rated current or a
  • Target power or rated power for the LED module 2 The invention thus proceeds in particular from the assumption that a coding circuit 6 or a coding resistor Rparam. is provided on the LED module whose resistance value encodes the setpoint of the current for the associated LED module. 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 Led-param .. this
  • Compensation unit 5 is suitable for influencing or changing the value of the operating parameter coded by the coding circuit 6. For example, can the
  • Ambient temperature of the LED module influence the coded target current such that at too high
  • Ambient temperature of the read from the LED driver 3 target current for the LEDs is lowered. This measure, known as “thermal derating”, can counteract premature aging of the LEDs that occur at too high ambient temperatures, which can also cause heat to be dissipated by the LEDs be reduced.
  • This compensation unit 5 is
  • Fig. 2 shows a schematic representation of a
  • a read-out converter 20 which is arranged in the LED driver 3 and for the reading of
  • Coding circuit 6 is responsible.
  • the stream Iparam. is the current at the output A / Rparam. or the current through the
  • Coding resistance Rparam . Alternatively, the value of the electrical resistance of the coding resistor Rparam. represent the coding size.
  • the flyback converter is mentioned here as an example for a readout converter.
  • the voltage Vparam. may alternatively be another
  • 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.
  • 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
  • the flyback converter has another on the secondary side
  • Capacitor Cl to the terminals A / Rparam. and A / LED.
  • 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 resistance Rparam. is arranged on the secondary side of this clocked potential-separated power supply in the form of a flyback converter.
  • This winding P2 is arranged on the primary side. Parallel to the further winding P2 is a resistor R2 arranged, as well as a
  • the voltage Vparam. on the coding resistor Rparam. is set to a defined voltage value of e.g. 5 volts regulated by a control unit 23.
  • the control unit 23 receives as feedback information, the voltage at the terminal ADC, the voltage Vparam. reproduces.
  • the timing of the switch Ql By changing the timing of the switch Ql, the output voltage Vparam. to be changed.
  • the voltage Vparam. by changing the duty ratio tv of the control signal FLB for the switch Ql or by
  • control unit 23 is responsible for the change of the duty ratio tv or the frequency f.
  • Rparam. reaches and maintains the predetermined voltage of, for example, 5 volts.
  • Duty cycle tv the timing of the switch Ql or the duty cycle tv of the control signal FLB be used.
  • 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
  • Control signal FLB for the switch Ql stabilized to a certain value.
  • This value is used according to the invention in order to be able to fall back on the Kodier discourse, as said the Kodier clergy either the adjusting at the defined voltage current Iparam. or the value of the coding resistor Rparam. is.
  • 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 connection between the current Iparam. and the value of the coding resistor is shown in FIG.
  • Frequency f of the control signal FLB determined.
  • the following table is an example of a corresponding look-up table:
  • supply circuit Vparam formed by the readout converter 20 can be made. also for
  • 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.
  • thermoelectric (Positive Temperature Coefficient) resistance increases the electrical resistance with increasing temperature, and vice versa for a thermistor in the form of a
  • 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
  • Resistance Rparam. in such a way that the detection circuit 22 does not detect the resistance value of the connected coding circuit 6, but rather a changed resistance value which is 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, e.g.
  • 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.
  • Switches Q2 Q1 is connected to a resonant converter in the form of an LLC converter.
  • the LLC converter comprises a series circuit of a capacitor Cl a
  • Capacitance Cl ⁇ and the inductance LI ⁇ form an LC resonant circuit.
  • a secondary winding Sl ⁇ is provided, which is coupled to the primary winding PI ⁇ and which is connected to a diode Dl ⁇ .
  • Secondary winding Sl ⁇ is also connected to a secondary side ground sGND.
  • the cathode of the diode Dl is ⁇ + connected to the one shown in Fig. 1 terminal A / LED.
  • 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 provided for a particular coding size - e.g.
  • 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
  • the read-out 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 no
  • a digital coding of characteristic values of the LED module can also take place in that instead of or in addition to
  • an intelligent circuit 50 is provided on the secondary side.
  • the smart circuit 50 is preferably between the terminals Led-param. and LED connected.
  • 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. If the intelligent circuit 50 is designed to switch between two load states, a binary coding can be performed. This binary
  • this digital information may also include sensor information, such as
  • a sensor 51 is provided, the measured values to the
  • intelligent circuit 50 which in turn transmits the measured values or information derived therefrom to the primary side of the read-out converter 20 or to the control unit 23 according to the digital coding by means of load jumps.
  • control unit 23 may be configured to detect whether the LED module is designed for the transmission of digital or analog information.
  • the LED driver 3 at the start by means of the read-out converter 20 output a voltage at the output. If the LED module is designed to output a digital information, then it can within a given feedback time a defined
  • the control unit 23 can monitor the load within the predetermined feedback time. If the control unit 23 detects a repeated load change in the sense of a pulsed signal within the predetermined feedback time, the
  • Control unit 23 thus recognize that the LED module is designed for the transmission of digital information and adjust the further operation of the read-out converter 20 thereto and detect the transmission of digital information.
  • a pulsed signal can also be emitted by the LED module, wherein for example, about the frequency or the
  • Ratio of the pulsed signal information can be transmitted coded.
  • a bidirectional exchange of information between the LED module and the LED converter 40 can also take place.
  • the read-out converter 20 can also be operated in such a way that it can be activated by repeatedly switching the clocking on and off
  • the switch of the read-out converter 20 for example, the switch Ql, high-frequency to
  • This high-frequency clocking can be interrupted in low-frequency pulse packets, so that, for example, a low-frequency output of
  • Packages of tension Vparam. can yield to the nominal value and a lowered value, wherein the lowered value can also be zero.
  • These pulse packets can recognize the LED module as transmitted information such as a query of a parameter.
  • the LED module for example, in the manner already explained according to the agreed protocol, a digital information such as an operating parameter, a
  • the LED driver may also communicate brightness commands or other control information to the LED module.
  • Fig. 6 shows an embodiment of a
  • intelligent circuit 50 according to the invention. Between the connections Led-param. and LED of the LED module is in This embodiment, only an intelligent circuit 50 is connected. Alternatively, parallel to the
  • 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 readout of the LED module 2 by the readout converter 20 can be limited in time by the smart circuit 50 is active only during a start phase due to a predetermined period of time as soon as a supply voltage to the LED module 2 is applied.
  • this supply voltage can also correspond to the nominal output voltage of the LED driver 3 for normal operation.
  • the smart circuit 50 is activated on the LED module 2 and represents a load for the readout converter 20.
  • the load is, for example, a constant or repeatedly changing active power load and generates a Power consumption at the terminal LEDpram.
  • the connected LED track 4 become conductive, whereby the LED driver 3 operates the LED module 2 in the lighting mode.
  • the read-out converter 20 may measure, for example, a discharge current through this load, an absolute current consumption of the circuit 50, a frequency of a change in power consumption of the LED module 2 via the terminal LEDparam, or a duty cycle or an amplitude of a power consumption change.
  • the readout converter 20 can conclude operating and / or maintenance parameters. For example, the read-out converter 20 may determine a desired or forward voltage or a desired current of the LED module and this the LED driver
  • this period for the starting phase can be determined for example by a time-charge circuit, wherein a
  • Timer capacitor is charged and after the charging of the timer capacitor, the circuit 50 is deactivated. As a result, the circuit 50 does not absorb any power in the continuous lighting operation of the LED track 4 and therefore does not influence the lighting operation of the LED track 4.
  • the starting phase is longer than that
  • the read-out converter 20 can also be designed so that it is activated only at certain points in time, for example after each restart or switch-on of the LED driver 3 or even after a certain number of operating hours has elapsed for a certain period of time
  • the circuit 50 may be designed such that it is only active during a start-up phase.
  • 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 change information
  • the read-out converter 20 may also be designed in such a way that it has, for example, as a transformer at least one optocoupler, which transmits information from the side of the LED module to the side of the control unit 23
  • the secondary side that is to say the side connected to the LED module
  • the primary side that is to say the side of the readout converter connected to the control unit 23, can be controlled by the primary side of the LED driver 3, in particular the
  • Devices such as an air coil, a Hall sensor or a capacitor for transmission over the
  • Potential barrier can be used.
  • the secondary-side part of the read-out converter 20 may for example also be arranged on the secondary side of the LED driver 3, in particular the secondary side of the LED converter 40, that it is arranged quasi between the two outputs LED + and LED- of the LED driver , An example is shown in FIG. Fig. 7 shows another example of one
  • the LED converter 40 is part of the here only
  • the LED converter 40 may be preceded by an isolated flyback converter or an isolated half-bridge converter.
  • the control unit 23 On the primary side of the LED driver 3, so for example on the primary side of the isolated flyback converter or isolated half-bridge converter, the control unit 23 may be arranged.
  • Fig. 7 As already explained, only a section of the LED driver 3 is shown exactly. Of the primary side of the LED driver 3, only the control unit 23 and the LED converter 40 are shown only symbolically.
  • Half-bridge converter as already explained by the control unit 23 of the LED driver 3, a desired current or voltage for the LED module 2 are generated.
  • the buck converter shown in FIG. 7 is only an optional element and not necessarily for the
  • Buck converter can not be present and the LED converter 40 directly feed the LED module 2. But it is
  • an evaluation unit 24 is present.
  • the control unit 23 is connected to the primary side of the
  • Transformer 21 connected thus can be done from the primary side of the LED driver 3 from a readout of the information from the LED module 2. For example, on the
  • Evaluation unit 24 is arranged, by means of which the voltage applied to the terminal Vparam signal is processed and transmitted via the transformer 21.
  • the voltage applied to the terminal Vparam signal is processed and transmitted via the transformer 21.
  • the voltage applied to the terminal Vparam signal is processed and transmitted via the transformer 21.
  • the voltage applied to the terminal Vparam signal is processed and transmitted via the transformer 21.
  • it may be the voltage or the current at the resistor Rparam or that from the intelligent one
  • Circuit 50 output digital information in accordance with an agreed protocol via the transmitter 21 are transmitted.
  • Circuit 6 by an evaluation unit 24 on the Secondary side of a transformer 21.
  • the circuit 6 is associated with the LED module 2.
  • an indirect detection of an electrical parameter of the circuit 6 or its temporal change takes place on the basis of a parameter which is detected on the primary side of the transformer 21, wherein preferably the electrical
  • Parameter of the circuit is the current through the circuit or the value of the resistor or the impedance of the circuit. It is thus detected on the primary side of the transformer 21, an electrical parameter by a
  • Evaluation unit 24 is transmitted from the secondary side of a transformer 21 to the primary side of the transformer 21.
  • the invention also relates to a method for transmitting information via an LED module, wherein the LED module can output a defined load change as a pulsed signal at a designated connection in a predetermined response time or a constant load
  • the LED driver can represent, and the LED driver has a readout converter, which can monitor the corresponding terminal of the LED module within this response time and can detect whether a pulsed signal or a constant load is present as an information source and on which
  • Transmission mode Pulsed signal or constant load
  • the LED module can transmit the information.
  • the primary side of a transformer is the side of the transformer facing the power input side, while that of the secondary side is that of the transformer

Landscapes

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

Abstract

L'invention concerne un procédé de lecture d'information d'un module LED (2), présentant les étapes suivantes: - transmission, par séparation galvanique (21), d'un paramètre électrique, à un circuit (6), par une unité d'évaluation (24), sur le côté secondaire d'un transmetteur, le circuit (6) étant associé au module LED (2) et, - détection, de préférence indirecte, d'un paramètre électrique du circuit (6), ou de sa variation dans le temps, au moyen d'un paramètre, qui est détecté sur le côté primaire du transmetteur (21), qui est de préférence le paramètre électrique du circuit du courant à travers le circuit, ou la valeur de la résistance ou de l'impédance du circuit.
PCT/AT2015/050024 2014-01-29 2015-01-28 Détection d'un module led WO2015113090A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112015000558.7T DE112015000558A5 (de) 2014-01-29 2015-01-28 Erfassung eines LED-Moduls

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ATGM38/2014U AT15167U1 (de) 2014-01-29 2014-01-29 Erfassung eines LED-Moduls
ATGM38/2014 2014-01-29

Publications (1)

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WO2015113090A1 true WO2015113090A1 (fr) 2015-08-06

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Country Link
AT (1) AT15167U1 (fr)
DE (1) DE112015000558A5 (fr)
WO (1) WO2015113090A1 (fr)

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US20140009084A1 (en) * 2012-07-06 2014-01-09 Lutron Electronics Co., Inc. Forward Converter Having a Primary-Side Current Sense Circuit

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008151800A1 (fr) * 2007-06-15 2008-12-18 Tridonicatco Gmbh & Co. Kg Appareil permettant de faire fonctionner une source de lumière, notamment une del
DE102009030106A1 (de) * 2009-06-22 2010-12-23 Minebea Co., Ltd. Verfahren zur Ansteuerung von Gasentladungslampen
US20120235598A1 (en) 2009-12-04 2012-09-20 Filippo Branchetti Method for Controlling the Operation of an Electronic Converter, and a Corresponding Electronic Converter, Lighting System and Software Product
US20120033453A1 (en) * 2010-04-30 2012-02-09 Infineon Technologies Ag Controller for a Resonant Switched-Mode Power Converter
US20120019157A1 (en) * 2010-07-23 2012-01-26 Lg Innotek Co., Ltd. Power supply apparatus for light emitting diode
US20120098463A1 (en) * 2010-10-22 2012-04-26 Stmicroelectronics, Inc. Primary-side regulation of output current in a line-powered led driver
US20120248998A1 (en) * 2011-03-30 2012-10-04 Sanken Electric Co., Ltd. Led driver and led illuminator having the same
WO2012132048A1 (fr) * 2011-03-30 2012-10-04 サンケン電気株式会社 Dispositif d'excitation de del et dispositif d'éclairage à del
US20130020945A1 (en) * 2011-07-19 2013-01-24 Chengdu Monolithic Power Systems Co., Ltd. Led driver and the method thereof
US20130044520A1 (en) * 2011-08-17 2013-02-21 Gye-Hyun Cho Switch control circuit, power factor corrector including the same, and driving method of the power factor corrector
WO2013153510A1 (fr) * 2012-04-12 2013-10-17 Koninklijke Philips N.V. Circuit d'interface de communication numérique pour paire de lignes à flancs de transition individuellement ajustables
DE102012007451A1 (de) * 2012-04-13 2013-10-17 Tridonic Gmbh & Co. Kg Wandler für ein Leuchtmittel, LED- Konverter und Verfahren zum Betreiben eines LLC-Resonanzwandlers
WO2013159131A1 (fr) * 2012-04-26 2013-10-31 Tridonic Gmbh & Co Kg Appareil permettant de faire fonctionner un dispositif d'éclairage et procédé associé
US20140009084A1 (en) * 2012-07-06 2014-01-09 Lutron Electronics Co., Inc. Forward Converter Having a Primary-Side Current Sense Circuit

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DE112015000558A5 (de) 2016-12-08

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