EP2409549A1 - Circuit destiné à un système de diodes électroluminescentes et module de diodes électroluminescentes - Google Patents

Circuit destiné à un système de diodes électroluminescentes et module de diodes électroluminescentes

Info

Publication number
EP2409549A1
EP2409549A1 EP10716766A EP10716766A EP2409549A1 EP 2409549 A1 EP2409549 A1 EP 2409549A1 EP 10716766 A EP10716766 A EP 10716766A EP 10716766 A EP10716766 A EP 10716766A EP 2409549 A1 EP2409549 A1 EP 2409549A1
Authority
EP
European Patent Office
Prior art keywords
circuit
voltage
light
emitting diode
current
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Withdrawn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
EP10716766A
Other languages
German (de)
English (en)
Inventor
Mustafa Dinc
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.)
Vishay Electronic GmbH
Original Assignee
Vishay Electronic GmbH
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 Vishay Electronic GmbH filed Critical Vishay Electronic GmbH
Publication of EP2409549A1 publication Critical patent/EP2409549A1/fr
Withdrawn legal-status Critical Current

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]
    • H05B45/50—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits
    • H05B45/58—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits involving end of life detection of 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
    • 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]
    • 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
    • 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
    • H05B45/52—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a parallel array of 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
    • H05B47/20—Responsive to malfunctions or to light source life; for protection
    • H05B47/21—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel
    • H05B47/22—Responsive to malfunctions or to light source life; for protection of two or more light sources connected in parallel with communication between the lamps and a central unit
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps
    • Y02B20/30—Semiconductor lamps, e.g. solid state lamps [SSL] light emitting diodes [LED] or organic LED [OLED]

Definitions

  • the invention relates to a circuit for operating a light emitting diode array, wherein the light emitting diode array comprises a plurality of strings connected in parallel of one or more light emitting diodes arranged in series through which flows in the operating state, a respective partial flow of an operating current flowing through the light emitting diode array.
  • light emitting diodes especially in white high power LEDs, makes them increasingly interesting for use in lights, such as street lights, or for other lighting purposes, for example, as a backlight for LCD or TFT displays.
  • a plurality of light emitting diodes are combined to form a specific light emitting diode array.
  • the light emitting diodes are arranged in a plurality of parallel strands, each comprising one or more light emitting diodes connected in series.
  • a constant current source which provides the entire operating current flowing through the light emitting diode array, wherein a control or limitation of the current flowing through all the strands sum current can be provided. If the operating meter of the LEDs, for example, the forward voltage or the maximum permissible current, are within a narrow tolerance range, and if due to a suitable arrangement of the LEDs any temperature differences between different LEDs are low, the total current will be evenly distributed to the individual strands.
  • each further increase in the partial currents causes overloading of the light-emitting diodes in the remaining strings, so that within a short time it will lead to a drop in performance and ultimately to a total failure Light emitting diode arrangement comes.
  • the object is achieved by the features of claim 1 and in particular by a circuit for operating a light-emitting diode array, wherein the light emitting diode array has a plurality of strings connected in parallel of one or more light emitting diodes arranged in series, by the respective partial flow in the operating state LED array flowing operating current flows.
  • the circuit comprises a current source for providing the operating current and is characterized in that the circuit is designed to detect the largest partial current and to regulate an operating value provided by the current source on the basis of this largest partial current such that none of the partial currents exceeds predetermined maximum current.
  • the operating value provided by the current source for example an operating current or an operating voltage, is thus limited so far that each partial current does not exceed a predetermined limit value.
  • the circuit thus compensates in a reliable manner the failure of one or more light-emitting diodes, so that a failure of the entire light-emitting diode arrangement or a thermal damage to the remaining light-emitting diodes is avoided by overcurrent.
  • the number of parallel to be operated by means of the circuit according to the invention strands is arbitrary and limited solely by the performance of the power source. The same applies to the number of LEDs per string.
  • the LEDs are so be chosen that all light-emitting diodes in the arrangement have a comparable characteristic, for example, with respect to the temperature dependence of the forward voltage, so that the partial currents in the individual strands do not differ significantly under normal operating conditions. This also ensures that all light-emitting diodes light up with approximately the same brightness.
  • the circuit according to the invention also makes it possible to operate the light-emitting diode arrangement with a maximum permissible current for the type of light-emitting diode used. This eliminates the need to operate the individual strands with a reduced by a corresponding margin of safety to compensate for any failure of a single strand.
  • the circuit is designed to supply a control voltage to the current source, the operating value being controllable on the basis of the magnitude of the control voltage. It can be used with conventional power sources, which expect a voltage as a control variable at its control input.
  • the circuit has an arrangement for providing the control voltage, which comprises a plurality of first diodes whose cathodes are connected to one another at a control voltage reference node, and a plurality of second diodes, wherein in the operating state the respective cathode each second diode is connected to one strand at a strand terminal, and a plurality of first resistors are connected at their first terminal to a first auxiliary voltage source and at their second terminal to the anode of a respective first one Diode of the anode of a respective second diode are connected, so that the potential at the control voltage reference node is dependent on the highest potential at the strand connection points.
  • the arrangement for providing the control voltage further comprises a voltage divider series circuit having a first, a second and a third voltage divider resistor, wherein a first, the first voltage divider resistor associated terminal of the voltage divider series circuit with the first auxiliary voltage source and a second, the third voltage divider resistor associated terminal of the voltage divider series circuit with a Reference potential is connected, wherein the connection between the second and the third voltage divider resistor is connected to the cathodes of the first diodes and thus forms said control voltage reference node, and wherein the control voltage is provided at the connection between the first and the second voltage divider resistor.
  • a control voltage suitable for controlling the current source can be generated from the potential in the control voltage reference node.
  • connection between the first and second voltage divider resistors may be connected to the output of an overvoltage protection circuit configured to provide an overvoltage signal whereby the operating value provided by the current source is reduced when one at the input of the Overvoltage circuit applied operating voltage exceeds a predetermined maximum value.
  • an overvoltage protection circuit configured to provide an overvoltage signal whereby the operating value provided by the current source is reduced when one at the input of the Overvoltage circuit applied operating voltage exceeds a predetermined maximum value.
  • the arrangement for providing the control voltage further comprises a plurality of second resistors, which are connected at their first terminal to a reference potential and at its second terminal to a respective strand terminal. These resistors serve to generate a certain potential at the line connection points as a function of the partial currents, on the basis of which ultimately a corresponding control voltage is provided.
  • the circuit comprises detection means for detecting a substantial increase in the electrical resistance or an interruption in a string.
  • the detection means comprise a plurality of third diodes, each of which is connected at its cathode to the second terminal of one of the second resistors and at its anode via a fourth voltage divider resistor to a second auxiliary voltage source, at the junction between the anodes of the third Diodes and the fourth voltage divider resistor, a terminal is provided at which a detection signal is provided.
  • This detection signal is output when there is a potential change at the node formed between the second terminal of one of the second resistors and at the cathode of a third diode due to the increase in electrical resistance or an interruption in one strand of the light emitting diode array comes.
  • the current source preferably comprises a switching regulator, in particular an up-converter.
  • Boost converters provide an operating voltage which is higher than the input voltage of the boost converter, so that light-emitting diode arrangements in which the sum of the forward voltages of the light-emitting diodes arranged in series is higher than the input voltage available for the circuit can also be operated by simple means ,
  • the circuit may be used, for example, in conjunction with solar power generators that typically provide a DC voltage of 12V.
  • the current source comprises means for clocked actuation of the switching regulator.
  • the operating value of the current source can thereby be changed.
  • the circuit has dimming means for dimming the light-emitting diode arrangement.
  • the dimming means may include, for example, a pulse width modulation, by which the operating current is clocked at a certain frequency.
  • the frequency of the interruptions is chosen so that the human eye perceives them no more than a flicker.
  • the duty cycle ie the ratio of switch-on time to switch-off time, determines the brightness of the light emitted by the light-emitting diode arrangement.
  • the dimming means may preferably be provided between the first terminals of the second resistors and the reference potential.
  • the circuit has an interface module for data communication, which is designed to provide an error signal due to the detection of a substantial increase in the resistance or an interruption in a string.
  • the interface module makes it possible to report a failure of one strand of the light emitting diode array by means of wireless or wired communication. If several circuits according to the invention are combined to form an operating unit, for example in the case of street lighting, in which a large number of lights must be monitored, it is possible to quickly identify a defective light, if this error signal includes address information that identifies the defective lamp allows. It eliminates the need to check the lights at regular intervals by visual inspection on their function.
  • the interface module is configured to generate the error signal based on a reduction in the voltage provided at the anodes of the third diodes.
  • a light-emitting diode module comprises a light-emitting diode arrangement with a plurality of strings connected in parallel of one or more series-connected strings. Neten LEDs and a circuit for operating the light emitting diode array according to the present invention.
  • Light emitting diode array summarize, all circuits of the light emitting diode module are connected to a single interface module. Consequently, this common interface module has several inputs via which a circuit according to the invention can be monitored. In this case, the output error signal may contain information which actually has an error in the monitored circuits.
  • FIG. 1 shows a circuit diagram of a circuit according to the invention or a light-emitting diode module according to the invention.
  • a circuit 10 comprises a known per se, configured as a boost converter current source 12, which comprises an array of multiple inductors and capacitors, a Schottky diode Sl and a MOS transistor Ml. Furthermore, a driver IC ICl is provided which is connected to the MOS transistor M 1 at its driver output DRV. This is clocked by the driver IC IC 1 to ultimately convert an input voltage applied to input terminals K1, K2 of the current source 12 into an operating voltage which is between see an output terminal K3 and a reference potential, ie a common ground, is available.
  • a boost converter current source 12 which comprises an array of multiple inductors and capacitors, a Schottky diode Sl and a MOS transistor Ml.
  • a driver IC ICl is provided which is connected to the MOS transistor M 1 at its driver output DRV. This is clocked by the driver IC IC 1 to ultimately convert an input voltage applied to input terminals K1, K2 of the current source 12 into an operating voltage
  • the driver IC ICl is connected to the reference potential with its ground outputs GND and has a control input SE.
  • the height of the operating voltage provided by the current source 12 depends on the level of a control voltage applied to the control input SE. If, for example, an IC of the Elmos E910.26 type is used as the driver IC IC1, a control voltage ⁇ 1.22 V leads to an increase in the operating voltage, while a control voltage> 1.22 V leads to a reduction in the operating voltage.
  • the driver IC IC 1 provides a first auxiliary voltage source at an auxiliary voltage output UH 1.
  • the height of the auxiliary voltage in the case of the Elmos E910.26 is 5 V.
  • a light-emitting diode arrangement 14 comprises four parallel-connected strings S 1 to S 4 of four light-emitting diodes 16 arranged in series, the anode-side terminals of the strands S 1 to S 4 being connected to each other and to the output K 3 of the current source 12 and a respective cathode-side terminal of a string S 1 to S4 is connected to a respective line connection point APl to AP4 of the circuit 10.
  • both the number of LEDs 16 per strand Sl to S4 and the number of strands Sl to S4 is only an example.
  • Light-emitting diode arrangements can be connected to the circuit 10 according to the invention, in which case both the number of light-emitting diodes per strand and the number of strands is greater or less than four.
  • the circuit IO has four first diodes Di 1 to D 14 whose cathodes are connected to one another at a control voltage reference node KP 1. Furthermore, four second diodes D21 to D24 are provided, the respective cathode of which is connected to a respective line connection point AP1 to AP4.
  • first resistors RI 1 to R 14 are connected at their first terminal to the auxiliary voltage output UH 1 of the driver IC ICl.
  • a respective second terminal of the resistors RI 1 to R 14 is connected to the anode of a respective first diode Di l to D 14 and the anode of a respective second diode D21 to D24.
  • Second resistors R21 to R24 are connected to each other at their first terminal, while the second terminal of a respective second resistor R21 to R24 is connected to a respective land connection point AP1 to AP4.
  • the interconnected first terminals of the second resistors R21 to R24 are directly connected to the reference potential.
  • the interconnected first terminals of the second resistors R21 to R24 are connected to a dimming circuit 18 which, depending on a clocked control signal applied to an input K5 of the dimming circuit 18, the second terminals of the resistors R21 to R24 by means of a MOS transistor M2 optionally connects to the reference potential.
  • the dimming circuit 18 operates on the principle of pulse width modulation, ie the ratio of turn-on time to turn-off time of the MOS transistor M2 determines the brightness of the light emitted from the light emitting diode array 14 light.
  • third diodes D31 to D34 are provided as means for fault detection of a failure of a string, each of which has at its cathode with the second terminal of one of the second resistors R21 to R24 and at its anode via a fourth voltage divider resistor RT4 with one at a terminal K4 connected second auxiliary voltage source is connected.
  • the second pole of the second auxiliary voltage source is connected to the reference potential.
  • the circuit 10 can also be designed without the aforementioned means for error detection.
  • a first voltage divider resistor RTl of a voltage divider series circuit is connected at its one terminal to the auxiliary voltage output UH1 or to the first terminals of the four first resistors R1 to R14 and with its other terminal to a control voltage node KP2.
  • This control voltage node KP2 is in turn connected to the control input of the driver ICs ICl and to one terminal of a second voltage divider resistor RT2.
  • the other terminal of the voltage dividing resistor RT2 is connected to the control voltage reference node KPl.
  • a third voltage divider resistor RT3 is also connected at its one terminal to the control voltage reference node KP1 and at its other terminal to the reference potential.
  • the control voltage node KP2 may additionally be connected to the output of an overvoltage protection circuit 20, which has a Zener diode ZD l.
  • the Zener diode ZD1 is connected to the operating voltage generated by the current source 12 and to the reference potential via a resistor. When the breakdown voltage of the zener diode ZD 1 is exceeded, an increase in the control voltage takes place at the control voltage node KP2, so that the driver IC ICl From the power source 12 generated operating voltage so far reduced until the Zener diode ZD 1 blocks again.
  • third diodes D31 to D34 are provided as means for fault detection of a failure of a string, each of which has at its cathode with the second terminal of one of the second resistors R21 to R24 and at its anode via a fourth voltage divider resistor RT4 with one at a terminal K4 connected second auxiliary voltage source is connected.
  • the second pole of the second auxiliary voltage source is connected to the reference potential.
  • the circuit 10 can also be designed without the aforementioned means for error detection.
  • the last digit of the reference numerals for the first, second and third diodes Dl 1 to Dl 4, D21 to D24, D31 to D34 and the first and second resistors Rl 1 to R14, R21 to R24 the numerals of the reference numerals Strands Sl to S4 and strand connection points APl to AP4 corresponds to which the respective diodes or resistors are assigned.
  • the currents flowing through the string S 1 and through the resistors RI 1 and R 21 and diodes D 1 and D 21 are considered by way of example.
  • a partial current which leads to a certain potential at the line connection point APl.
  • a small current flows from the auxiliary voltage output UH 1 through the voltage divider resistors RT1, RT2 and RT3 of the voltage divider series circuit, whereby a certain potential also sets at the control voltage reference node KP1.
  • the diode pair consisting of the diodes D i and D 21 ensures that the potentials at the line terminal point AP 1 and at the control voltage reference node KP 1 are the same.
  • the potential in a node KP3 also rises as a result to which the diodes Di l and D21 and the resistor R12 are connected. Due to this potential increase at the node KP3, the current flow through the first diode Di l increases, which in turn leads to an increase in potential at the control voltage reference node KP 1.
  • This potential increase at the control voltage reference node KP1 is also associated with a voltage increase at the control voltage node KP2, i. the voltage applied to the control input SE increases.
  • This increase in the control voltage causes the current source 12 to reduce its operating value, ie its output voltage, to such an extent that the current in the light-emitting diode arrangement 14 and in particular in the strand S 1 falls.
  • the voltages at the nodes KP3, KPl and KP2 also fall until the control voltage at the control input SE has reached its setpoint.
  • the regulation described above also applies to the remaining strands S2 to S4.
  • the potential at the control voltage reference node KPl only the string having the highest partial current is relevant. Only the diode of the first diode Di l to D 14, which is assigned to this strand, is conductive. At the other diodes is seen in the flow direction lower voltage, so that they therefore conduct less or not at all. Consequently, only the highest of the potential present at the line connection points AP1 to AP4 is decisive for the height of the control voltage.
  • the circuit 10 detects on the strand with the highest partial current too high a voltage drop across one of the second resistors R21 to R24 and regulates the supply voltage provided by the current source 12 at the output K3 so far down until again predetermined by the design of the circuit maximum partial flow per strand flows.
  • strand Sl should be considered again.
  • this strand S 1 flows through the resistor R21 a certain partial flow, so that the associated strand connection point APl is at a certain potential.
  • a certain current flows through the voltage divider resistor RT4, the third diode D31 and the resistor R21 from the second auxiliary voltage source connected to the terminal K4.
  • a node KP4, which between the anode of the diode D31 and the voltage dividing resistor RT4 is therefore at a slightly higher potential than the strand connection point APl.
  • Rl 1 to R14 each 5.6 k ⁇
  • Auxiliary voltage at connection K4 5 V.
  • the current flowing through the voltage divider resistor RT4 is distributed to all four diodes D31 to D34 when none of the strings S 1 to S4 is interrupted.
  • the forward voltages of the diodes D31 to D34 in this case will be slightly lower than in the case of an interruption of the string S 1, in which the entire current flowing through the voltage divider resistor RT4 flows only through the one diode D31.
  • an interface module (not shown) for data communication can be connected, which can output a corresponding error signal when detecting a reduction of the potential at the connection K6.
  • the data communication can be wireless or wired, for example via a control line, a radio connection, a WLAN network or an IP connection.
  • the interface module can also be designed such that a monitoring of the input voltage of the current source can take place.
  • the interface module can also take over the control of the dimming circuit 18.
  • the driver IC ICl has a switching input ON, which is connected to a terminal K7, via which in turn a connection to the interface module can be established. Activation or deactivation of the current source 12 is possible via this switching input after receiving corresponding commands, so that the light-emitting diode arrangement 14 can thus be switched off without disconnecting the connection to the input voltage.
  • a microcontroller can be used on the interface module which has both at least one digital input and at least one A / D converter input.
  • the interface module thus ultimately represents a universal interface to the outside world, via which both monitoring and control of the light-emitting diode arrangement is possible.
  • the present circuit can be used, for example, in light-emitting diode illumination bodies for exterior and interior lights, for backlighting of LEDs, for LCD or TFT monitors or for display panels and displays with a light-emitting diode matrix.

Landscapes

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

Abstract

L'invention concerne un circuit permettant de faire fonctionner un système de diodes électroluminescentes, le système de diodes électroluminescentes présentant plusieurs lignes montées en parallèle d'une ou de plusieurs diodes électroluminescentes agencées en série, qui sont traversées, lorsqu'elles fonctionnent, par un courant partiel respectif d'un courant de service traversant le système de diodes électroluminescentes, une source de courant délivrant le courant de service. Le circuit est conçu pour identifier le courant partiel le plus important et pour régler sur la base de ce courant partiel le plus élevé une valeur de service délivrée par la source de courant partiel, de telle manière qu'aucun des courants partiels ne dépasse un courant maximal prédéfini.
EP10716766A 2009-04-22 2010-04-21 Circuit destiné à un système de diodes électroluminescentes et module de diodes électroluminescentes Withdrawn EP2409549A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102009018428A DE102009018428A1 (de) 2009-04-22 2009-04-22 Schaltung für eine Leuchtdiodenanordnung und Leuchtdiodenmodul
PCT/EP2010/002456 WO2010121806A1 (fr) 2009-04-22 2010-04-21 Circuit destiné à un système de diodes électroluminescentes et module de diodes électroluminescentes

Publications (1)

Publication Number Publication Date
EP2409549A1 true EP2409549A1 (fr) 2012-01-25

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EP10716766A Withdrawn EP2409549A1 (fr) 2009-04-22 2010-04-21 Circuit destiné à un système de diodes électroluminescentes et module de diodes électroluminescentes

Country Status (5)

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US (1) US9277608B2 (fr)
EP (1) EP2409549A1 (fr)
DE (1) DE102009018428A1 (fr)
RU (1) RU2539878C2 (fr)
WO (1) WO2010121806A1 (fr)

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RU2539878C2 (ru) 2015-01-27
DE102009018428A1 (de) 2010-10-28
US20120112647A1 (en) 2012-05-10
RU2011147197A (ru) 2013-05-27
US9277608B2 (en) 2016-03-01
WO2010121806A1 (fr) 2010-10-28

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