EP2999312B1 - Stromversorgung für lampenansteuerung und verfahren zur steuerung einer stromversorgung zur lampenansteuerung - Google Patents

Stromversorgung für lampenansteuerung und verfahren zur steuerung einer stromversorgung zur lampenansteuerung Download PDF

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Publication number
EP2999312B1
EP2999312B1 EP13852349.3A EP13852349A EP2999312B1 EP 2999312 B1 EP2999312 B1 EP 2999312B1 EP 13852349 A EP13852349 A EP 13852349A EP 2999312 B1 EP2999312 B1 EP 2999312B1
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EP
European Patent Office
Prior art keywords
power supply
terminal
circuit
lamp
control
Prior art date
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Application number
EP13852349.3A
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English (en)
French (fr)
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EP2999312A1 (de
EP2999312A4 (de
Inventor
Toyotaka Takashima
Teppei Matsuzaki
Ryohei Kitamura
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Honda Motor Co Ltd
Shindengen Electric Manufacturing Co Ltd
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Honda Motor Co Ltd
Shindengen Electric Manufacturing Co Ltd
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Publication of EP2999312A1 publication Critical patent/EP2999312A1/de
Publication of EP2999312A4 publication Critical patent/EP2999312A4/de
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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • 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]
    • H05B45/40—Details of LED load circuits
    • H05B45/44—Details of LED load circuits with an active control inside an LED matrix
    • H05B45/48—Details of LED load circuits with an active control inside an LED matrix having LEDs organised in strings and incorporating parallel shunting devices
    • 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
    • H05B45/54—Circuit arrangements for operating light-emitting diodes [LED] responsive to malfunctions or undesirable behaviour of LEDs; responsive to LED life; Protective circuits in a series array of LEDs

Definitions

  • the present invention relates to an LED lamp lighting device according to the preamble of claim 1 and to a control method of the LED lamp lighting device.
  • An LED lamp lighting device according to the preamble of claim 1 is known from WO 2012/127 515 A1 .
  • LED (Light Emitting Diode) lamps can be driven at low voltages with longer life, lower power consumption, higher response speeds, and higher shock resistance as compared with filament lamps (bulb lamps), achieving smaller sizes and lighter weights.
  • LED lamps can be suitably used for, for example, vehicle head lamps.
  • Japanese Patent Laid-Open No. 2012-160413 describes an LED lamp lighting device as an example of a LED lamp driver.
  • An the LED lamp lighting device described in Japanese Patent Laid-Open No. 2012-160413 detects an LED open error according to the voltage of the negative terminal of an LED array of LED lamps connected in series. If the LED lamp lighting device detects the LED open error, an LED voltage applied to a positive terminal is increased until recovery from the LED open error. A voltage at the time of recovery from the LED open error is determined as a temporary LED voltage. If the LED array is illuminated, the LED lamp lighting device controls a power supply so as to apply an LED voltage that is larger than the temporary LED voltage by a predetermined value.
  • the LED open error can be detected with a simple circuit configuration and an LED voltage can be determined without causing the LED open error.
  • the multiple LED lamps are connected in series in the LED lamp lighting device.
  • a driving current may be interrupted.
  • all the LED lamps connected in series may be turned off.
  • a broken lamp cannot be illuminated and an unbroken lamp can be illuminated by a user's switch operation.
  • An LED lamp lighting device that is connected between a first power supply terminal on a low potential side of a lamp driving power supply and a second power supply terminal on a high potential side of the lamp driving power supply, receives a driving current from the lamp driving power supply, and causes the driving current to illuminate a plurality of LED lamps connected in series, the LED lamp lighting device comprising:
  • the lamp driving power supply has a constant voltage control function and a constant current control function, if a current is capable of passing through any one of the LED lamps of the first lamp circuit and the second lamp circuit, a constant current is applied to the LED lamp by the constant current control function, and if a current is incapable of passing through the LED lamps of the first lamp circuit and the second lamp circuit, an output voltage between the first power supply terminal and the second power supply terminal is increased to a predetermined specified voltage and then is kept constant by the constant voltage control function.
  • control switch element is a thyristor with a cathode connected to the second contact and an anode connected to the second terminal.
  • the switch control circuit comprises:
  • control switch element is a thyristor with a cathode connected to the first terminal and an anode connected to the first contact.
  • the switch control circuit comprises:
  • the lamp driving power supply comprises:
  • the lamp driving power supply further comprises a sensing resistor connected between the second input terminal and the second power supply terminal, the driving control circuit controls the power supply switch element so as to keep a constant current passing through the sensing resistor if a current passes through the sensing resistor, and the driving control circuit controls the power supply switch element so as to keep a voltage between the first power supply terminal and the second power supply terminal at the predetermined specified voltage if no current passes through the sensing resistor.
  • the switch circuit allows a user to manually switch an electrical connection between the reference node and the first contact and an electrical connection between the reference node and the second contact.
  • a control method of an LED lamp lighting device being connected between a first power supply terminal on a low potential side of a lamp driving power supply and a second power supply terminal on a high potential side of the lamp driving power supply, receiving a driving current from the lamp driving power supply, and causing the driving current to illuminate a plurality of LED lamps connected in series
  • the LED lamp lighting device comprising: a first terminal connected to the first power supply terminal; a second terminal connected to the second power supply terminal; a first lamp circuit including one LED lamp or a plurality of LED lamps in a series connection, with a first end connected to the first terminal; a second lamp circuit including one LED lamp or a plurality of LED lamps in a series connection, with a first end connected to a second end of the first lamp circuit and a second end connected to the second terminal; a switch circuit that switches an electrical connection between a reference node connected to the second end of the first lamp circuit and a first contact and an electrical connection between the reference node
  • An LED lamp lighting device is connected between a first power supply terminal on a low potential side of a lamp driving power supply and a second power supply terminal on a high potential side of the lamp driving power supply, receives a driving current from the lamp driving power supply, and causes the driving current to illuminate a plurality of LED lamps connected in series.
  • the LED lamp lighting device comprises a first terminal connected to the first power supply terminal; a second terminal connected to the second power supply terminal; a first lamp circuit including one LED lamp or a plurality of LED lamps in a series connection, with a first end connected to the first terminal; a second lamp circuit including one LED lamp or a plurality of LED lamps in a series connection, with a first end connected to a second end of the first lamp circuit and a second end connected to the second terminal; a switch circuit that switches an electrical connection between a reference node connected to the second end of the first lamp circuit and a first contact and an electrical connection between the reference node and a second contact; a control switch element with a first end connected to the first terminal and a second end connected to the first contact or the first end connected to the second contact and the second end connected to the second terminal; and a switch control circuit that controls the control switch element according to a potential difference between the first end and the second end of the control switch element.
  • the switch control circuit turns on the control switch element if the potential difference between the first end and the second end of the control switch element is at least a predetermined reference voltage, and the switch control circuit turns off the control switch element if the potential difference between the first end and the second end of the control switch element is smaller than the reference voltage.
  • an operation for a defective LED lamp of the LED lamp lighting device can be similar to that for a typical bulb lamp lighting device.
  • Figure 1 is a circuit diagram showing an example of the configuration of a system including an LED lamp lighting device 100 according to a first embodiment as an aspect of the present invention.
  • Figure 1 shows an example of an LED lamp lighting device used for a vehicle head lamp.
  • the LED lamp lighting device 100 is connected to a lamp driving power supply 10.
  • the lamp driving power supply 10 is connected to an alternating-current generator G.
  • the alternating-current generator G is a single-phase alternating-current generator that rotates in synchronization with, for example, a vehicle engine so as to generate an alternating current.
  • the alternating-current generator G has one end G1 that is connected to a first input terminal TI1 of the lamp driving power supply 10 and the other end G2 that is grounded.
  • the alternating-current generator G outputs a generated alternating voltage VA, to the lamp driving power supply 10.
  • a first power supply terminal TS1 on the negative voltage side (low potential side) of the lamp driving power supply 10 is connected to a first terminal Ta1 of the LED lamp lighting device 100
  • a second power supply terminal TS2 on the positive voltage side (high potential side) of the lamp driving power supply 10 is connected to a second terminal Ta2 of the LED lamp lighting device 100.
  • the lamp driving power supply 10 supplies a driving current to the LED lamp lighting device 100.
  • the driving current for illuminating an LED lamp is obtained by rectifying the alternating current of the alternating-current generator G.
  • the LED lamp lighting device 100 is connected between the first power supply terminal TS1 on the low potential side and the second power supply terminal TS2 on the high potential side of the lamp driving power supply 10.
  • the LED lamp lighting device 100 receives the supplied driving current from the lamp driving power supply 10 and the driving current illuminates LED lamps connected in series.
  • the LED lamp lighting device 100 includes the first terminal Ta1, the second terminal Ta2, a first lamp circuit L1, a second lamp circuit L2, a switch circuit SW1, a control switch element SCR, and a switch control circuit C1.
  • the first terminal Ta1 is connected to the first power supply terminal TS1.
  • the second terminal Ta2 is connected to the second power supply terminal TS2.
  • the first lamp circuit L1 includes one LED lamp or a plurality of LED lamps in a series connection. One end of the first lamp circuit L1 is connected to the first terminal Ta1.
  • the first lamp circuit L1 includes two LED lamps LH1 and LH2 connected in series.
  • one end of the first lamp circuit L1 is located on the cathode side of the LED lamp LH1 of the first lamp circuit L1.
  • the other end of the first lamp circuit L1 is located on the anode side of the LED lamp LH2 of the first lamp circuit L1.
  • the LED lamps of the first lamp circuit L1 are, for example, high beam lamps for vehicle head lamps (e.g., headlights for driving).
  • the second lamp circuit L2 includes one LED lamp or a plurality of LED lamps in a series connection. One end of the second lamp circuit L2 is connected to the other end of the first lamp circuit L1 and the other end of the second lamp circuit L2 is connected to the second terminal Ta2.
  • the second lamp circuit L2 includes two LED lamps LL1 and LL2 connected in series.
  • one end of the second lamp circuit L2 is located on the cathode side of the LED lamp LL1 of the second lamp circuit L2.
  • the other end of the second lamp circuit L2 is located on the anode side of the LED lamp LL2 of the second lamp circuit L2.
  • the LED lamps of the second lamp circuit L2 are, for example, low beam lamps for the head lamps (e.g., headlights for passing).
  • the switch circuit SW1 is electrically connected between a reference node NB connected to the other end of the first lamp circuit L1 and a first contact NS1 connected to the first terminal Ta1 or between the reference node NB and a second contact NS2.
  • the switch circuit SW1 switches an electrical connection between the reference node NB and the first contact NS1 and an electrical connection between the reference node NB and the second contact NS2.
  • the LED lamps LH1 and LH2 of the first lamp circuit L1 are short-circuited.
  • a current does not pass through the first lamp circuit L1, so that the LED lamps LL1 and LL2 of the second lamp circuit L2 illuminate and the LED lamps LH1 and LH2 of the first lamp circuit L1 do not illuminate.
  • the switch circuit SW1 is a switch for switching a high beam (the first lamp circuit L1 and the second lamp circuit L2 illuminate) Hi and a low beam (the second lamp circuit L2 illuminates) Lo of the vehicle headlight described above.
  • the switch circuit SW1 is manually controlled by a user. Specifically, the switch circuit SW1 switches an electrical connection between the reference node NB and the first contact NS1 and an electrical connection between the reference node NB and the second contact NS2 in response to a manual operation of the user.
  • control switch element SCR is connected to the second contact NS2 and the other end of the control switch element SCR is connected to the second terminal Ta2.
  • the control switch element SCR is a thyristor.
  • the cathode of the thyristor is connected to the second contact NS2 and the anode of the thyristor is connected to the second terminal Ta2.
  • control switch element SCR may be connected to the first terminal Ta1 and the other end of the control switch element SCR may be connected to the first contact NS1.
  • the switch control circuit C1 controls the control switch element SCR according to a potential difference between one end and the other end of the control switch element SCR (a potential difference between the second contact NS2 and the second terminal Ta2).
  • the switch control circuit C1 turns on the control switch element SCR if a potential difference (absolute value) between one end and the other end of the control switch element SCR (between the second contact NS2 and the second terminal Ta2) is not larger than a predetermined reference voltage.
  • the potential difference is compared with the value (absolute value) of the reference voltage (also in the following description).
  • the switch control circuit C1 turns off the control switch element SCR if a potential difference (absolute value) between one end and the other end of the control switch element SCR (between the second contact NS2 and the second terminal Ta2) is smaller than the reference voltage.
  • the switch control circuit C1 includes, for example, a first control resistor Rs, a second control resistor Rt, and a Zener diode Ze.
  • One end of the first control resistor Rs is connected to the second contact NS2 and the other end of the first control resistor Rs is connected to the gate (control terminal) of the thyristor (control switch element) SCR.
  • One end of the second control resistor Rt is connected to the other end of the first control resistor Rs.
  • the anode of the Zener diode Ze is connected to the other end of the second control resistor Rt and the cathode of the Zener diode Ze is connected to the second terminal Ta2.
  • the switch control circuit C1 is configured to monitor the voltage of the second contact NS2 by means of the first control resistor Rs, the second control resistor Rt, and the Zener diode Ze.
  • the Zener diode Ze conducts so as to pass a current through the second control resistor Rt.
  • the Zener diode Ze conducts so as to pass a current through the second control resistor Rt, generating a voltage between the anode and the gate of the control switch element (thyristor) SCR.
  • the voltage allows the passage of a gate current through the gate of the control switch element SCR, turning on the control switch element SCR.
  • the reference voltage can be set at a desired value according to the resistance values of the first control resistor Rs and the second control resistor Rt and the breakdown voltage of the Zener diode Ze.
  • the LED lamp lighting device 100 configured thus includes the LED lamps LH1, LH2, LL1, and LL2 connected in series between the first terminal Ta1 and the second terminal Ta2, and can switch illuminated ones of the LED lamps LH1, LH2, LL1, and LL2 ( Figure 1 ).
  • the lamp driving power supply 10 includes, for example, the first input terminal TI1, a second input terminal TI2, the first power supply terminal TS1, the second power supply terminal TS2, a power supply switch element SX, a capacitor CX, a sensing resistor RX, and a driving control circuit CON.
  • the first power supply terminal TS1 on the low potential side is connected to the first terminal Ta1.
  • the second power supply terminal TS2 on the high potential side is connected to the second terminal Ta2.
  • the first input terminal TI1 is connected to the one end G1 of the alternating-current generator G.
  • the second input terminal TI2 is connected to the other end G2 of the alternating-current generator G via the ground.
  • One end of the power supply switch element SX is connected to the first input terminal TI1 and the other end of the power supply switch element SX is connected to the first power supply terminal TS1.
  • the power supply switch element SX is, for example, a thyristor.
  • the cathode of the thyristor is connected to the first input terminal TI1 and the anode of the thyristor is connected to the first power supply terminal TS1.
  • the gate of the thyristor receives a control signal from the driving control circuit CON.
  • the capacitor CX is a smoothing capacitor (electrolytic capacitor).
  • the sensing resistor RX is connected between the second input terminal TI2 and the second power supply terminal TS2.
  • the driving control circuit CON controls the power supply switch element SX so as to keep a constant current applied between the second input terminal TI2 and the second power supply terminal TS2.
  • the driving control circuit CON controls the power supply switch element SX so as to set a voltage between the first power supply terminal TS1 and the second power supply terminal TS2 at a predetermined specified voltage.
  • the driving control circuit CON detects the current IX passing through the sensing resistor RX.
  • the driving control circuit CON controls the power supply switch element SX so as to keep constant the current IX passing through the sensing resistor RX.
  • the power supply switch element (thyristor) SX performs half-wave rectification on a voltage on the negative-phase side of the alternating voltage VA outputted from the alternating-current generator G, under the control of the driving control circuit CON. This supplies a driving current to the LED lamp lighting device 100.
  • the power supply switch element (thyristor) SX charges the capacitor CX during an on period.
  • the capacitor CX is a rectifying/smoothing capacitor that supplies a current to the LED lamp lighting device 100 during the off period of the power supply switch element (thyristor) SX.
  • the driving control circuit CON controls the time of conduction (ignition phase) of the power supply switch element (thyristor) SX so as to keep constant the effective value or the mean value of a current passing through the LED lamp lighting device 100.
  • the driving control circuit CON controls the power supply switch element SX so as to set a potential difference between the first power supply terminal TS1 and the second power supply terminal TS2 at the predetermined specified voltage.
  • the lamp driving power supply 10 has a constant voltage control function and a constant current control function.
  • the lamp driving power supply 10 can apply a current to the LED lamp of one of the first lamp circuit L1 and the second lamp circuit L2, a constant current is applied to the LED lamp by the constant current control function (outputs a constant current from the second power supply terminal TS2).
  • the LED lamp is not defective (is conducting).
  • an output voltage between the first power supply terminal TS1 and the second power supply terminal TS2 is increased to the predetermined specified voltage and is kept constant by the constant voltage control function.
  • the LED lamp If a current cannot be applied to the LED lamp, the LED lamp is defective (broken) with an open load.
  • Figure 2 is a circuit diagram showing an example in which the switch circuit of the LED lamp lighting device in Figure 1 electrically connects the reference node and the second contact.
  • Figure 3 is a circuit diagram showing an example in which the switch circuit of the LED lamp lighting device in Figure 1 electrically connects the reference node and the first contact.
  • the switch circuit SW1 electrically connects the reference node NB and the first contact NS1.
  • the switch circuit SW1 is switched by a user so as to select a high beam Hi.
  • the current IX supplied from the lamp driving power supply 10 passes through "the second terminal Ta2, the second lamp circuit L2, the first lamp circuit L1, and then the first terminal Ta1" ( Figure 2 ).
  • the switch circuit SW1 is operated by the user to switch from an electrical connection between the reference node NB and the second contact NS2 to an electrical connection between the reference node NB and the first contact NS1 connected to the first terminal Ta1 ( Figure 3 ); meanwhile, the switch control circuit C1 turns off the control switch element SCR.
  • the switch circuit SW1 is switched by the user so as to select a low beam Lo.
  • the current IX supplied from the lamp driving power supply 10 passes through "the second terminal Ta2, the second lamp circuit L2, the switch circuit SW1, and then the first terminal Ta1".
  • the LED lamp lighting device 100 short-circuits the illuminated LED lamps LH1 and LH2 out of the plurality of LED lamps LH1, LH2, LL1, and LL2 connected in series from the state in which all of the LED lamps LH1, LH2, LL1, and LL2 are illuminated.
  • the illuminated LED lamps LH1 and LH2 are short-circuited so as to interrupt a current passing through the LED lamps LH1 and LH2. Hence, the LED lamps LH1 and LH2 are turned off.
  • the LED lamp lighting device 100 short-circuits some of the illuminated LED lamps from a state in which some of the LED lamps connected in series are illuminated.
  • the illuminated LED lamps are short-circuited so as to interrupt a current passing through the LED lamps. Hence, the LED lamps are turned off.
  • the switch control circuit C1 of the LED lamp lighting device 100 is operated.
  • Figure 4 is a circuit diagram showing an example in which the switch circuit SW1 of the LED lamp lighting device 100 in Figure 1 electrically connects the reference node NB and the second contact NS2.
  • Figure 5 is a circuit diagram showing an example in which the switch circuit SW1 of the LED lamp lighting device 100 in Figure 1 electrically connects the reference node NB and the first contact NS1.
  • Figure 6 is a circuit diagram showing an example in which the switch circuit SW1 of the LED lamp lighting device 100 in Figure 1 electrically connects the reference node NB and the second contact NS2.
  • Figure 7 is a circuit diagram showing an example in which the switch circuit SW1 of the LED lamp lighting device 100 in Figure 1 electrically connects the reference node NB and the first contact NS1.
  • Figure 8 shows the relationship between the on/off of switching of a typical bulb lamp lighting device and the lighting of each bulb lamp.
  • Figure 9 shows the relationship between the on/off of the switch circuit of the LED lamp lighting device 100 and the lighting of the LED lamps according to the first embodiment shown in Figure 1 .
  • the LED lamp LL2 of the second lamp circuit L2 is defective (broken).
  • the LED lamp LH1 of the first lamp circuit L1 is defective (broken).
  • the state of the switch circuit SW1 in the example of Figure 4 is similar to that of Figure 2 described above.
  • the switch circuit SW1 is switched by the user so as to select the high beam lamp Hi.
  • the switch circuit SW1 is operated so as to electrically connect the reference node NB and the second contact NS2 while the LED lamp LL2 of the second lamp circuit L2 is defective. Also in this case, a current does not pass through the second lamp circuit L2.
  • the switch control circuit C1 turns off the control switch element SCR if a potential difference (absolute value) between one end and the other end of the control switch element SCR (between the second contact NS2 and the second terminal Ta2) is smaller than the reference voltage.
  • a voltage between the first power supply terminal TS1 and the second power supply terminal TS2 is increased to the specified voltage by the constant voltage control function of the lamp driving power supply 10.
  • the switch control circuit C1 turns on the control switch element SCR if a potential difference (absolute value) between one end and the other end of the control switch element SCR (between the second contact NS2 and the second terminal Ta2) is not smaller than the reference voltage.
  • the current IX supplied from the lamp driving power supply 10 passes through "the second terminal Ta2, the control switch element SCR, the switch circuit SW1, the first lamp circuit L1, and then the first terminal Ta1.”
  • the switch control circuit C1 is operated so as to skip the defective LED lamp LL2 and illuminate the normal LED lamps LH1 and LH2 (two lamps).
  • the switch circuit SW1 is switched by the user so as to select the low beam lamp Lo.
  • the switch circuit SW1 is operated so as to electrically connect the reference node NB and the first contact NS1 while the LED lamp LL2 of the second lamp circuit L2 is defective. Also in this case, a current does not pass through the second lamp circuit L2.
  • first and second lamp circuits L1 and L2 are turned off ( Figure 9 ).
  • the switch circuit SW1 is switched by the user so as to select the high beam lamp Hi.
  • the switch circuit SW1 is operated so as to electrically connect the reference node NB and the second contact NS2 while the LED lamp LH1 of the first lamp circuit L1 is defective. Also in this case, a current does not pass through the first lamp circuit L1.
  • first and second lamp circuits L1 and L2 are turned off ( Figure 9 ).
  • the switch circuit SW1 is switched by the user so as to select the low beam lamp Lo.
  • the current IX supplied from the lamp driving power supply 10 passes through "the second terminal Ta2, the second lamp circuit L2, the switch circuit SW1, and then the first terminal Ta1."
  • an operation for the defective LED lamp of the LED lamp lighting device 100 according to the first embodiment is identical to that for the defective bulb lamp of the typical bulb lamp lighting device in Figure 8 .
  • defective one of the LED lamps connected in series can be skipped to turn on the other LED lamps in the LED lamp lighting device 100.
  • an operation for a failure in the LED lamp can be identical to that for the typical bulb lamp lighting device.
  • the lighting of the LED lamp can be controlled by a user operation of the switch circuit.
  • one end of a control switch element SCR may be connected to a first terminal Ta1 and the other end of the control switch element SCR may be connected to a first contact NS1.
  • one end of the control switch element SCR is connected to the first terminal Ta1 and the other end of the control switch element SCR is connected to the first contact NS1 in an LED lamp lighting device 100.
  • Figure 10 is a circuit diagram showing an example of the configuration of a system including the LED lamp lighting device 100 according to the second embodiment, which is an aspect of the present invention.
  • the same reference numerals as those of Figure 1 indicate the same configurations as those of the first embodiment.
  • the LED lamp lighting device 100 includes the first terminal Ta1, a second terminal Ta2, a first lamp circuit L1, a second lamp circuit L2, a switch circuit SW1, the control switch element SCR, and a switch control circuit C1.
  • one end of the control switch element SCR is connected to the first terminal Ta1 and the other end of the control switch element SCR is connected to the first contact NS1.
  • the control switch element SCR is a thyristor.
  • the cathode of the thyristor is connected to the first terminal Ta1 and the anode of the thyristor is connected to the first contact NS1.
  • the switch control circuit C1 controls the control switch element SCR according to a potential difference between one end and the other end of the control switch element SCR (a potential difference between the first contact NS1 and the first terminal Ta1).
  • the switch control circuit C1 includes a first control resistor Rs, a second control resistor Rt, and a Zener diode Ze.
  • One end of the first control resistor Rs is connected to the first terminal Ta1 and the other end of the first control resistor Rs is connected to the gate (control terminal) of the thyristor (control switch element) SCR.
  • One end of the second control resistor Rt is connected to the other end of the first control resistor Rs.
  • the anode of the Zener diode Ze is connected to the other end of the second control resistor Rt and the cathode of the Zener diode Ze is connected to the first contact NS1.
  • the switch control circuit C1 is configured to monitor a voltage between the first terminal Ta1 and the first contact NS1 by means of the first control resistor Rs, the second control resistor Rt, and the Zener diode Ze.
  • the Zener diode Ze conducts so as to pass a current through the second control resistor Rt.
  • the Zener diode Ze conducts so as to pass a current through the second control resistor Rt, generating a voltage between the anode and the gate of the control switch element (thyristor) SCR.
  • the voltage allows the passage of a gate current through the gate of the control switch element SCR, turning on the control switch element SCR.
  • the reference voltage can be set at a desired value according to the resistance values of the first control resistor Rs and the second control resistor Rt and the breakdown voltage of the Zener diode Ze.
  • defective one of the LED lamps connected in series can be skipped to turn on the other LED lamps as in the first embodiment.
  • an operation for a defective LED lamp can be similar to that for a typical bulb lamp lighting device as in the first embodiment.
  • the lighting of the LED lamp can be controlled by a user operation of the switch circuit.
  • the LED lamp of the first lamp circuit is a high beam lamp for a vehicle head lamp and the LED lamp of the second lamp circuit is a low beam lamp for the head lamp.
  • the LED lamp of the first lamp circuit may be a low beam lamp for a vehicle head lamp and the LED lamp of the second lamp circuit may be a high beam lamp for the head lamp.

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Claims (10)

  1. LED-Leuchteneinrichtung, die zwischen einem ersten Energieversorgungsanschluss (TS1) auf einer Niederspannungsseite einer Leuchtenenergieversorgung (10) und einem zweiten Energieversorgungsanschluss (TS2) auf einer Hochspannungsseite der Leuchtenenergieversorgung (10) angeschlossen ist, einen Ansteuerstrom von der Leuchtenenergieversorgung (10) erhält und bewirkt, dass der Ansteuerstrom einen ersten Leuchtenschaltkreis und einen zweiten Leuchtenschaltkreis, die in Reihe geschaltet sind, beleuchtet, wobei die LED-Leuchteneinrichtung (100) umfasst:
    einen ersten Anschluss (Ta1), der mit dem ersten Energieversorgungsanschluss (TS1) gekoppelt ist;
    einen zweiten Anschluss (Ta2), der mit dem zweiten Energieversorgungsanschluss (TS2) gekoppelt ist;
    wobei der erste Leuchtenschaltkreis (L1) eine LED-Leuchte oder eine Vielzahl von in Reihe geschalteten LED-Leuchten (LH1, LH2) umfasst, wobei ein erstes Ende mit dem ersten Anschluss (Ta1) gekoppelt ist; und
    wobei der zweite Leuchtenschaltkreis eine LED-Leuchte oder eine Vielzahl von in Reihe geschalteten LED-Leuchten (L1, LL1, LL2) umfasst, wobei ein erstes Ende mit einem zweiten Ende des ersten Leuchtenschaltkreises und ein zweites Ende mit dem zweiten Anschluss (Ta2) gekoppelt ist; gekennzeichnet durch
    einen Schalt-Schaltkreis (SW1), der einen Referenzknoten (NB) umfasst, der mit dem zweiten Ende des ersten Leuchtenschaltkreises (L1) gekoppelt ist, wobei der Schalt-Schaltkreis den Referenzknoten zwischen einem ersten Kontakt (NS1) und einem zweiten Kontakt (NS2) elektrisch koppeln kann;
    ein Steuer-Schaltelement (SCR) mit einem ersten Ende, das mit dem ersten Anschluss (Ta1) verbunden ist, und einem zweiten Ende, das mit dem ersten Kontakt (NS1) verbunden ist, oder dessen erstes Ende mit dem zweiten Kontakt (Ta2) und dessen zweites Ende mit dem zweiten Anschluss (NS2) verbunden ist;
    ein zweiter Schalt-Steuerschaltkreis (C1), der das Steuer-Schaltelement (SCR) gemäß einer Potentialdifferenz zwischen dem ersten Ende und dem zweiten Ende des Steuer-Schaltelementes (SCR) steuert,
    wobei der Schalt-Steuerschaltkreis (C1) das Steuer-Schaltelement (SCR) einschaltet, wenn die Potentialdifferenz zwischen dem ersten Ende und dem zweiten Ende des Steuer-Schaltelementes (SCR) wenigstens einer vorgegebenen Bezugsspannung entspricht, und
    wobei der Schalt-Steuerschaltkreis (C1) das Steuer-Schaltelement (SCR) ausschaltet, wenn die Potentialdifferenz zwischen dem ersten Ende und dem zweiten Ende des Steuer-Schaltelementes (SCR) kleiner ist als die Bezugsspannung.
  2. LED-Leuchteneinrichtung nach Anspruch 1, wobei die Leuchten-Energieversorgung (10) eine Konstantspannungs-Stenerfunktion und eine Konstantstrom-Steuerfunktion umfasst,
    wenn ein Strom durch eine der LED-Leuchten des ersten Leuchtenschaltkreises (L1) und des zweiten Leuchtenschaltkreises (L2) gehen kann, ein konstanter Strom an die LED-Leuchte von der Konstantstrom-Steuerfunktion angelegt wird, und
    wenn kein Strom durch die LED-Leuchten des ersten Leuchtenschaltkreises (L1) und des zweiten Leuchtenschaltkreises (L2) gehen kann, eine Ausgangsspannung zwischen dem ersten Energieversorgungsanschluss (TS1) und dem zweiten Energieversorgungsanschluss (TS2) auf eine vorgegebene spezifische Spannung erhöht und dann durch die Konstantspannung-Steuerfunktion konstant gehalten wird.
  3. LED-Leuchteneinrichtung nach Anspruch 1, wobei das Steuer-Schaltelement (SCR) ein Thyristor ist, mit einer Kathode, die mit dem zweiten Kontakt (NS2) verbunden ist und einer Anode, die mit dem zweiten Anschluss (Ta2) verbunden ist.
  4. LED-Leuchteneinrichtung nach Anspruch 3, wobei der Schalt-Steuerschaltkreis (C1) umfasst:
    einen ersten Steuerwiderstand (Rs) mit einem ersten Ende, das mit dem zweiten Kontakt (NS2) verbunden ist, und einem zweiten Ende, das mit einem Gate des Thyristors (SCR) verbunden ist;
    einen zweiten Steuerwiderstand (Rt) mit einem ersten Ende, das mit dem zweiten Ende des ersten Steuervvderstands (Rs) verbunden ist; und
    eine Zenerdiode (Ze) mit einer Anode, die mit einem zweiten Ende des zweiten Steuerwiderstands (Rt) verbunden ist, und einer Kathode, die mit dem zweiten Anschluss (Ta2) verbunden ist.
  5. LED-Leuchteneinrichtung nach Anspruch 1, wobei das Steuer-Schaltelement (SCR) ein Thyristor ist mit einer Kathode, die mit dem ersten Anschluss (Ta1) verbunden ist, und einer Anode, die mit dem ersten Kontakt (NS1) verbunden ist.
  6. LED-Leuchteneinrichtung nach Anspruch 5, wobei der Schalt-Steuerschaltkreis (C1) umfasst:
    einen ersten Steuerwiderstand (Rs) mit einem ersten Ende, der mit dem ersten Anschluss (Ta1) verbunden ist, und einem zweiten Ende, der mit einem Gate des Thyristors (SCR) verbunden ist;
    einen zweiten Steuerschaltkreis (Rt) mit einem ersten Ende, der mit dem zweiten Ende des ersten Steuerschaltkreises (Rs) verbunden ist; und
    eine Zenerdiode (Ze) mit einer Anode, die mit einem zweiten Ende des zweiten Steuerwiderstands (Rt) verbunden ist, und einer Kathode, die mit dem ersten Kontakt (NS1) verbunden ist.
  7. LED-Leuchteneinrichtung nach Anspruch 1, wobei die Leuchtenenergieversorgung (10) umfasst:
    ein Energieversorgungs-Schaltelement (SX) mit einem ersten Ende, das mit einem ersten Eingangsanschluss (T11) verbunden ist, und einem zweiten Ende, das mit dem ersten Energieversorgungsanschluss (TS1) verbunden ist;
    einen Kondensator (CX) mit einem ersten Ende, der mit dem zweiten Ende des Energieversorgungs-Schaltelementes (SX) verbunden ist, und einem zweiten Ende, das mit einem zweiten Eingangsanschluss (T12) verbunden ist; und
    einen Ansteuerschaltkreis (CON), der das Energieversorgungs-Schaltelement (SX) so steuert, dass es einen Strom zwischen dem zweiten Eingangsanschluss (T12) und dem zweiten Energieversorgungsanschluss (TS2) konstant hält, wenn zwischen dem zweiten Eingangsanschluss (T12) und dem zweiten Energieversorgungsanschluss (TS2) ein Strom angelegt wird, und dass das Energieversorgungs-Schaltelement so ansteuert, dass es eine Spannung zwischen dem ersten Energieversorgungsanschluss (TS1) und dem zweiten Energieversorgungsanschluss (TS2) auf einer vorgegebenen spezifischen Spannung hält, wenn zwischen dem zweiten Eingangsanschluss (T12) und dem zweiten Energieversorgungsanschluss (TS2) kein Strom anliegt.
  8. LED-Leuchteneinrichtung nach Anspruch 7, wobei die Leuchtenansteuerversorgung (10) ferner einen Sensorwiderstand (RX) umfasst, der zwischen dem zweiten Eingangsanschluss (T12) und dem zweiten Energieversorgungsanschluss (TS2) angeschlossen ist,
    der Ansteuerschaltkreis (CON) das Energieversorgungs-Schaltelement (SX) so ansteuert, dass es einen Strom, der durch den Sensorwiderstand (RX) geht, konstant hält, wenn durch den Sensorwiderstand (RX) ein Strom geht, und
    der Ansteuerschaltkreis (CON) das Energieversorgungs-Schaltelement (SX) so ansteuert, dass eine Spannung zwischen dem ersten Energieversorgungsanschluss (TS1) und dem zweiten Energieversorgungsanschluss (TS2) auf einer vorgegebenen spezifischen Spannung hält, wenn kein Strom durch den Sensorwiderstand (RX) geht.
  9. LED-Leuchteneinrichtung nach Anspruch 1, wobei der Schalt-Schaltkreis (SW1) es einem Benutzer erlaubt, eine elektrische Verbindung zwischen dem Referenzknoten (NB) und dem ersten Kontakt (NS1) und eine elektrische Verbindung zwischen dem Referenzknoten (NB) und dem zweiten Kontakt (NS2) manuell zu schießen.
  10. Steuerverfahren einer LED-Leuchteneinrichtung (100), wobei die LED-Leuchteneinrichtung zwischen einem ersten Energieversorgungsanschluss (TS2) auf einer Niederspannungsseite einer Leuchten-Ansteuerversorgung (10) und einem zweiten Energieversorgungsanschluss (TS) auf einer Hochspannungsseite der Leuchten-Ansteuerversorgung (10) angeschlossen ist, einen Ansteuerstrom von der Leuchten-Ansteuerversorgung (10) empfängt und bewirkt, dass der Ansteuerstrom einen ersten Leuchtenschaltkreis und einen zweiten Leuchtenschaltkreis, die in Reihe geschaltet sind, beleuchtet, und wobei die LED-Leuchteneinrichtung (100) umfasst:
    einen ersten Anschluss (Ta1), der mit dem ersten Energieversorgungsanschluss (TS1) gekoppelt ist;
    einen zweiten Anschluss (Ta2), der mit dem zweiten Energieversorgungsanschluss (TS2) gekoppelt ist;
    wobei der erste Leuchtenschaltkreis (L1) eine LED-Leuchte oder eine Vielzahl von in Reihe geschalteten LED-Leuchten (LH1, LH2) umfasst, wobei ein erstes Ende mit dem ersten Anschluss (Ta1) gekoppelt ist; und
    wobei der zweite Leuchtenschaltkreis eine LED-Leuchte oder eine Vielzahl von in Reihe geschalteten LED-Leuchten (L1, LL1, LL2) umfasst, wobei ein erstes Ende mit einem zweiten Ende des ersten Leuchtenschaltkreises und ein zweites Ende mit dem zweiten Anschluss (Ta2) gekoppelt ist;
    einen Schalt-Schaltkreis (SW1), der einen Referenzknoten (NB) umfasst, der mit dem zweiten Ende des ersten Leuchtenschaltkreises (L1) gekoppelt ist, wobei der Schalt-Schaltkreis den Referenzknoten zwischen einem ersten Kontakt (NS1) und einem zweiten Kontakt (NS2) elektrisch koppeln kann;
    ein Steuer-Schaltelement (SCR) mit einem ersten Ende, das mit dem ersten Anschluss (Ta1) verbunden ist, und einem zweiten Ende, das mit dem ersten Kontakt (NS1) verbunden ist, oder dessen erstes Ende mit dem zweiten Kontakt (Ta2) und dessen zweites Ende mit dem zweiten Anschluss (NS2) verbunden ist;
    ein zweiter Schalt-Steuerschaltkreis (C1), der das Steuer-Schaltelement (SCR) gemäß einer Potentialdifferenz zwischen dem ersten Ende und dem zweiten Ende des Steuer-Schaltelementes (SCR) steuert,
    wobei das Steuerverfahren umfasst:
    Einschalten des Steuer-Schaltelementes (SCR), wenn die Potentialdifferenz zwischen dem ersten Ende und dem zweiten Ende des Steuer-Schaltelementes (SCR) wenigstens einer vorgegebenen Bezugsspannung entspricht, und
    Ausschalten des Steuer-Schaltelementes (SCR), wenn die Potentialdifferenz zwischen dem ersten Ende und dem zweiten Ende des Steuer-Schaltelementes (SCR) kleiner ist als die Bezugsspannung.
EP13852349.3A 2013-05-13 2013-05-13 Stromversorgung für lampenansteuerung und verfahren zur steuerung einer stromversorgung zur lampenansteuerung Active EP2999312B1 (de)

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JP6884918B2 (ja) * 2018-02-23 2021-06-09 新電元工業株式会社 車両用ｌｅｄ点灯制御装置、及び、車両用ｌｅｄ点灯制御装置の制御方法
WO2019163074A1 (ja) * 2018-02-23 2019-08-29 新電元工業株式会社 車両用ｌｅｄ点灯制御回路、車両用ｌｅｄ点灯制御装置、及び、車両用ｌｅｄ点灯制御回路の制御方法

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ZA201405502B (en) 2016-05-25
BR112014018489A8 (pt) 2021-04-27
BR112014018489B1 (pt) 2021-12-14
EP2999312A1 (de) 2016-03-23
WO2014184847A1 (ja) 2014-11-20
EP2999312A4 (de) 2016-06-15
BR112014018489A2 (pt) 2019-09-24
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TW201448670A (zh) 2014-12-16
JPWO2014184847A1 (ja) 2017-02-23

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