WO2014061127A1 - Led lamp lighting control circuit and led lamp lighting control method - Google Patents

Led lamp lighting control circuit and led lamp lighting control method Download PDF

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Publication number
WO2014061127A1
WO2014061127A1 PCT/JP2012/076928 JP2012076928W WO2014061127A1 WO 2014061127 A1 WO2014061127 A1 WO 2014061127A1 JP 2012076928 W JP2012076928 W JP 2012076928W WO 2014061127 A1 WO2014061127 A1 WO 2014061127A1
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WO
WIPO (PCT)
Prior art keywords
control circuit
led lamp
input terminal
lamp lighting
voltage
Prior art date
Application number
PCT/JP2012/076928
Other languages
French (fr)
Japanese (ja)
Inventor
元統 藤井
Original Assignee
新電元工業株式会社
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 新電元工業株式会社 filed Critical 新電元工業株式会社
Priority to JP2013520664A priority Critical patent/JP5602945B1/en
Priority to BR112013021714A priority patent/BR112013021714A2/en
Priority to PCT/JP2012/076928 priority patent/WO2014061127A1/en
Priority to CN201280004023.9A priority patent/CN103890979B/en
Priority to TW102124510A priority patent/TWI514921B/en
Priority to IT000238A priority patent/ITMO20130238A1/en
Publication of WO2014061127A1 publication Critical patent/WO2014061127A1/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60Q—ARRANGEMENT OF SIGNALLING OR LIGHTING DEVICES, THE MOUNTING OR SUPPORTING THEREOF OR CIRCUITS THEREFOR, FOR VEHICLES IN GENERAL
    • B60Q1/00—Arrangement of optical signalling or lighting devices, the mounting or supporting thereof or circuits therefor
    • B60Q1/0088—Details of electrical connections
    • 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
    • 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

Definitions

  • the present invention relates to an LED lamp lighting control circuit and an LED lamp lighting control method.
  • lamps such as bulbs are generally used for headlamps such as motorcycles (see, for example, Japanese Patent No. 4597194 and Japanese Patent No. 4480817).
  • the bulb lamp applied in the above prior art has a problem of large power consumption. Therefore, it is conceivable to apply an LED lamp having a small resistance value to a headlamp such as a motorcycle.
  • the LED lamp lighting control circuit 100A of the conventional LED lamp includes a rectifier circuit composed of a diode and a thyristor connected to the coil L of the single-phase AC generator G, and a control circuit CON that controls the rectifier circuit. (FIG. 4).
  • the LED lamp lighting control circuit 100A controls the rectifier circuit by the control circuit CON, charges the battery B with the electric power generated by the single-phase AC generator G, and supplies the electric power from the battery B to the LED lamp.
  • the conventional LED lamp lighting control circuit 100A for example, when the reverse voltage VR of the LED lamp is low and a negative surge occurs from a load or the like, or when a reverse voltage at the time of reverse connection of the battery B is applied, etc. In this case, a diode for protecting the LED element is required separately.
  • the conventional LED lamp lighting control circuit 100A requires a battery B for supplying power to the LED elements, and therefore cannot be applied to a vehicle not equipped with the battery B.
  • An LED lamp lighting control circuit includes: A first input terminal to which the other end of the coil of the single-phase AC generator having one end connected to the ground is connected; A second input terminal to which the cathode side of the LED element whose anode side is connected to the ground is connected; An output terminal to which a load is connected; A ground terminal to which the ground is connected; A first switch element having one end connected to the first input terminal and the other end connected to the second input terminal; A first control circuit for controlling the first switch element; A second switch element having one end connected to the output terminal and the other end connected to the first input terminal; A second control circuit for controlling the second switch element,
  • the first control circuit includes: When the output voltage of the first input terminal output from the single-phase AC generator has a first polarity, the first switch element is turned on, On the other hand, when the output voltage has the second polarity, the first switch element is turned off.
  • the first polarity is a negative polarity;
  • the second polarity is a positive polarity;
  • the first switch element is a first thyristor having a cathode connected to the first input terminal and an anode connected to the second input terminal;
  • the second switch element is a second thyristor having a cathode connected to the output terminal and an anode connected to the first input terminal.
  • a limiting resistor for limiting a current is connected in series with the LED element between the second input terminal and the ground.
  • the first control circuit includes: In the case where the output voltage of the first input terminal output from the single-phase AC generator has the first polarity, the first thyristor is turned on when the magnitude of the output voltage exceeds a target voltage.
  • the first control circuit includes: A first voltage dividing resistor having one end connected to the second input terminal; A second voltage dividing resistor having one end connected to the other end of the first voltage dividing resistor and the other end connected to the ground terminal; A diode having an anode connected to the other end of the first voltage dividing resistor; An averaging capacitor connected between the cathode of the diode and the ground terminal; An oscillation circuit that generates and outputs an oscillation signal that is a sawtooth or triangular wave; An averaging resistor having one end connected to the cathode of the diode; A comparator for controlling the first thyristor based on a result of comparison between the oscillation signal and the comparison voltage, the oscillation signal and a comparison voltage at the other end of the averaging resistor being input.
  • the comparator is When the output voltage has a negative polarity and the magnitude of the comparison voltage is less than the magnitude of the oscillation signal, the first thyristor is turned off, and the magnitude of the comparison voltage is the magnitude of the oscillation signal. If this is the case, turn on the first thyristor, On the other hand, when the output voltage has a positive polarity, the first thyristor is turned off.
  • the first control circuit further includes a resistor connected between the output of the comparator and the gate of the thyristor.
  • the first control circuit includes: A first resistor having one end connected to the second input terminal; A first diode having a cathode connected to the other end of the first resistor; A second resistor having one end connected to the anode of the first diode and the other end connected to the ground terminal; A first capacitor connected in parallel with the second resistor between the anode of the first diode and the ground terminal; A third resistor having one end connected to the anode of the first diode; A Schottky barrier diode having an anode connected to the other end of the third resistor; A fourth resistor having one end connected to the cathode of the Schottky barrier diode and the other end connected to the ground terminal; A second diode having a cathode connected to the first input terminal; A fifth resistor having one end connected to the anode of the second diode; A first PNP-type bipolar transistor having a collector connected to the other end of the fifth resistor, an emitter connected to the
  • a limiting resistor for limiting a current is connected in series with the LED element between the second input terminal and the ground.
  • the capacitance value of the second capacitor is larger than the capacitance value of the first capacitor.
  • the second control circuit controls the second switch element based on a voltage between the first input terminal and the ground terminal and a voltage between the output terminal and the ground terminal. It is characterized by that.
  • a battery is connected between the output terminal and the ground terminal.
  • the second control circuit includes: When the output voltage has a positive polarity and the charging voltage of the battery connected between the output terminal and the ground is less than a specified voltage, the second thyristor is turned on, while the charging voltage When is equal to or higher than the specified voltage, the second thyristor is turned off.
  • a plurality of the LED elements are connected in series between the second input terminal and the ground.
  • An LED lamp lighting control method includes: A first input terminal to which the other end of the coil of the single-phase AC generator whose one end is connected to the ground is connected, and a second input to which the cathode side of the LED element whose anode side is connected to the ground is connected A first terminal having one end connected to the first input terminal and the other end connected to the second input terminal; an output terminal to which a load is connected; a ground terminal to which the ground is connected; A switch element; a first control circuit that controls the first switch element; a second switch element having one end connected to the output terminal and the other end connected to the first input terminal; A second control circuit for controlling the second switch element, and an LED lamp lighting control method by an LED lamp lighting control circuit comprising: In the case where the output voltage of the first input terminal output from the single-phase AC generator has the first polarity, and the magnitude of the output voltage is equal to or higher than a target voltage, the first control circuit causes the first control circuit to 1 switch element is turned on
  • An LED lamp lighting control circuit includes a first switch element (first thyristor) having one end connected to a first input terminal and the other end connected to a second input terminal; A first control circuit for controlling the first switch element; a second switch element (second thyristor) having one end connected to the output terminal and the other end connected to the first input terminal; And a second control circuit for controlling the switch element.
  • the first control circuit turns on the first switch element when the output voltage of the first input terminal output from the single-phase AC generator has the first polarity (negative polarity). On the other hand, the first control circuit turns off the first switch element when the output voltage has the second polarity (positive polarity).
  • the output voltage of the first polarity (negative polarity) of the first input terminal output from the single-phase AC generator is supplied to the LED lamp.
  • the output voltage of the second polarity (positive polarity) of the first input terminal output from the single-phase AC generator is not supplied to the LED lamp. That is, the negative component of the electric power generated by the single-phase AC generator is supplied to the LED lamp.
  • the current is limited by the first switch element (first thyristor).
  • the LED lamp lighting control circuit according to the present invention has been a problem in the prior art even when a negative surge occurs from a load or the like, or when a reverse voltage at the time of reverse connection of the battery B is applied. Then, an additional diode for protecting the LED element is not necessary.
  • the LED lamp lighting control circuit according to the present invention is also applied to a vehicle not equipped with a battery while reducing the power consumption by applying the LED lamp to the lamp to reduce the power consumption. Can be possible.
  • FIG. 1 is a diagram illustrating an example of a configuration of an LED lamp lighting control system 1000 according to a first embodiment which is an aspect of the present invention.
  • FIG. 2 is a diagram illustrating an example of the configuration of the LED lamp lighting control system 2000 according to the second embodiment which is an aspect of the present invention.
  • FIG. 3 is a diagram illustrating an example of a configuration of an LED lamp lighting control system 3000 according to a third embodiment which is an aspect of the present invention.
  • FIG. 4 is a diagram showing an example of the configuration of a conventional LED lamp lighting control system 1000A.
  • FIG. 1 is a diagram illustrating an example of a configuration of an LED lamp lighting control system 1000 according to a first embodiment which is an aspect of the present invention.
  • the LED lamp lighting control system 1000 includes a battery B, a single-phase AC generator G, an LED lamp lighting control circuit 100, a plurality of LED elements A, and a limiting resistor RX.
  • the single-phase AC generator G has a coil L having one end connected to the ground and the other end connected to the first input terminal TIN1 of the LED lamp lighting control circuit 100.
  • the single-phase AC generator A is configured to charge the battery B and generate and output an AC voltage for lighting the LED element A.
  • This single-phase AC generator A is, for example, an alternator that is directly connected to a motorcycle engine.
  • the battery B is connected between the output terminal TOUT and the ground terminal TG.
  • This battery B has a positive terminal (positive side) and a negative terminal (negative side), and can be charged / discharged through these terminals.
  • This battery B is a battery of a two-wheeled vehicle, for example.
  • the plurality of LED elements A are connected in series between the second input terminal TIN2 of the LED lamp lighting control circuit 100 and the ground.
  • the LED element A is a lamp such as a headlight or a tail lamp of a two-wheeled vehicle.
  • the limiting resistor RX is connected in series with the LED element A between the second input terminal TIN2 and the ground.
  • the limiting resistor RX limits the current flowing through the LED element A.
  • a load (not shown) is connected between the ground and the output terminal TOUT. This load is, for example, a vehicle load such as equipment that requires a power source in a two-wheeled vehicle.
  • the LED lamp lighting control circuit 100 includes a first input terminal TIN1, a second input terminal TIN2, an output terminal TOUT, a ground terminal TG, and a first switch element. (First thyristor) S1, a second switch element (second thyristor) S2, a first control circuit CON1, and a second control circuit CON2.
  • the first switch element S1 may be referred to as a first thyristor S1
  • the second switch element S2 may be referred to as a second thyristor S2.
  • the first input terminal TIN1 is connected to the other end of the coil L of the single-phase AC generator G whose one end is connected to the ground.
  • the second input terminal TIN2 is connected to the cathode side of the LED element A whose anode side is connected to the ground.
  • the output terminal TOUT is connected to a load (not shown).
  • the ground terminal TG is connected to the ground.
  • the first switch element S1 has one end connected to the first input terminal TIN1 and the other end connected to the second input terminal TIN2.
  • the first switch element S1 is, for example, a first thyristor having a cathode connected to the first input terminal TIN1 and an anode connected to the second input terminal TIN2.
  • the first control circuit CON1 controls the first switch element S1 by outputting a signal to the gate of the first switch element (first thyristor) S1.
  • the first control circuit CON1 has, for example, the magnitude of the output voltage.
  • the first switch element S1 is turned on.
  • the first control circuit CON1 is configured to turn off the first switch element S1 when the output voltage has the second polarity (positive polarity).
  • the first switch element S1 may be turned on. In this case, after the capacitor is charged with a predetermined level of charge, the first switch element S1 is turned off until the capacitor is discharged to some extent (the capacitor supplies power to the LED element A to some extent).
  • one end of the second switch element S2 is connected to the output terminal TOUT, and the other end is connected to the first input terminal TIN1.
  • the second switch element S2 is a second thyristor having a cathode connected to the output terminal TOUT and an anode connected to the first input terminal TIN1.
  • the second control circuit CON2 controls the second switch element (second thyristor) S2 by outputting a signal to the gate of the second switch element (second thyristor) S2. .
  • the second control circuit CON2 controls the second switch element S2 based on the voltage between the first input terminal TIN1 and the ground terminal TG and the voltage between the output terminal TOUT and the ground terminal TG. It is supposed to be.
  • the second control circuit CON2 When the output voltage is the second polarity (positive polarity) and the charging voltage of the battery B connected between the output terminal TOUT and the ground is less than the specified voltage, the second control circuit CON2 The second thyristor S2 is turned on.
  • the second control circuit CON2 is configured to turn off the second thyristor S2 when the charging voltage of the battery B is equal to or higher than the specified voltage.
  • the first control circuit CON1 has, for example, the magnitude of the output voltage.
  • the first switch element S1 is turned on.
  • the LED lamp lighting control circuit 100 lights the LED element A when the magnitude of the output voltage is equal to or higher than the target voltage.
  • the first control circuit CON1 turns off the first switch element S1 when the output voltage is the second polarity (positive polarity).
  • the second control circuit CON2 when the output voltage is the second polarity (positive polarity), the second control circuit CON2 is such that the charging voltage of the battery B connected between the output terminal TOUT and the ground is less than the specified voltage.
  • the second thyristor S2 When the second thyristor S2 is turned on.
  • the positive component of the output voltage of the single-phase AC generator A is supplied to the battery B, and the battery B is charged.
  • the second control circuit CON2 turns off the second thyristor S2 when the charging voltage of the battery B is equal to or higher than the specified voltage.
  • the LED lamp lighting control circuit has the first switch element (first thyristor) having one end connected to the first input terminal and the other end connected to the second input terminal. ), A first control circuit for controlling the first switch element, a second switch element (second thyristor) having one end connected to the output terminal and the other end connected to the first input terminal And a second control circuit for controlling the second switch element.
  • the first control circuit When the output voltage of the first input terminal output from the single-phase AC generator is the first polarity (negative polarity) and the output voltage becomes equal to or higher than the target voltage, the first control circuit Turn on the element. On the other hand, the first control circuit turns off the first switch element when the output voltage has the second polarity (positive polarity).
  • the output voltage of the first polarity (negative polarity) of the first input terminal output from the single-phase AC generator is supplied to the LED lamp.
  • the output voltage of the second polarity (positive polarity) of the first input terminal output from the single-phase AC generator is not supplied to the LED lamp (LED element A).
  • the negative component of the electric power generated by the single-phase AC generator is supplied to the LED lamp.
  • the current is limited by the first switch element (first thyristor).
  • the LED lamp lighting control circuit according to the present invention also has a problem in the prior art, such as when a negative surge occurs from a load or when a reverse voltage is applied when the battery is reversely connected. An additional diode for protecting the LED element is not necessary.
  • the LED element when the LED is turned on by limiting the output current of the battery B, when the total number of LEDs connected in series increases and the total forward drop voltage VF of the LED becomes 12 V or more, the LED element is Cannot be lit. For example, since the forward voltage drop VF of the white LED is 3 to 4 V per one, it cannot be lit with four or more connected in series.
  • the single-phase AC generator is usually designed so that the peak voltage is higher than the battery voltage in order to charge the battery. For example, a voltage of about 20 V at 1000 rpm and about 30 V at 1500 rpm is generated so that the amount of charge can be secured even when the rotational speed of the single-phase AC generator is low, such as idling. Since the LED element can be lit using this voltage, even four or more LED elements connected in series can be lit.
  • the LED lamp lighting control circuit reduces the power consumption by applying the LED lamp to the lamp, thereby reducing the load on the single-phase AC generator and also for the vehicle not equipped with a battery. Can be made applicable.
  • FIG. 2 is a diagram illustrating an example of the configuration of the LED lamp lighting control system 2000 according to the second embodiment which is an aspect of the present invention.
  • the same reference numerals as those in FIG. 1 indicate the same configurations as those in the first embodiment.
  • the LED lamp lighting control system 2000 includes a battery B, a single-phase AC generator G, an LED lamp lighting control circuit 200, a plurality of LED elements A, and a limiting resistor RX.
  • the configuration of the LED lamp lighting control system 2000 shown in FIG. 2 is the same as the LED lamp lighting control system 1000 shown in FIG.
  • the LED lamp lighting control circuit 200 includes a first input terminal TIN1, a second input terminal TIN2, an output terminal TOUT, a ground terminal TG, and a first switch.
  • An element (first thyristor) S1, a second switch element (second thyristor) S2, a first control circuit CON1, and a second control circuit CON2 are provided.
  • the configuration of the LED lamp lighting control circuit 200 shown in FIG. 2 is the same as that of the LED lamp lighting control circuit 100 shown in FIG. 1 except that the configuration of the first control circuit CON1 is specifically described. .
  • the first control circuit CON1 includes a first voltage dividing resistor DR1, a second voltage dividing resistor DR2, a diode D, an averaging capacitor Ca, an averaging resistor Ra, and an oscillation.
  • a circuit OSC, a comparator COMP, and a resistor RY are included.
  • the first voltage dividing resistor DR1 has one end connected to the second input terminal TIN2.
  • the second voltage dividing resistor DR2 has one end connected to the other end of the first voltage dividing resistor DR1 and the other end connected to the ground terminal TG.
  • the anode of the diode D is connected to the other end of the first voltage dividing resistor DR1.
  • the averaging capacitor Ca is connected between the cathode of the diode D and the ground terminal TG.
  • the oscillation circuit OSC generates and outputs an oscillation signal that is a sawtooth wave or a triangular wave.
  • the averaging resistor Ra has one end connected to the cathode of the diode.
  • the resistor RY is connected between the output of the comparator COMP and the gate of the thyristor S1.
  • the comparator COMP controls the operation of the first thyristor S1 by outputting a signal to the gate of the first thyristor S1 via the resistor RY.
  • the comparator COMP receives the oscillation signal and the comparison voltage at the other end of the averaging resistor Ra, and controls the first thyristor S1 based on the result of comparing the oscillation signal with the comparison voltage. .
  • the comparator COMP is configured to turn off the first thyristor S1 when the output voltage is the first polarity (negative polarity) and the magnitude of the comparison voltage is less than the magnitude of the oscillation signal. .
  • the comparator COMP turns on the first thyristor S1 when the output voltage is the first polarity (negative polarity) and the magnitude of the comparison voltage is greater than or equal to the magnitude of the oscillation signal. .
  • the comparator COMP is configured to turn off the first thyristor S1 when the output voltage is the second polarity (positive polarity).
  • the LED lamp lighting control circuit 200 when the output voltage is the first polarity (negative polarity) and the magnitude of the comparison voltage is less than the magnitude of the oscillation signal, the LED lamp lighting control circuit 200 (comparator COMP) has the first thyristor S1. Turn off.
  • the negative component of the output voltage of the single-phase AC generator A is not supplied to the plurality of LED elements A when the negative component is less than a predetermined magnitude (target voltage).
  • the LED lamp lighting control circuit 200 (comparator COMP) has a first thyristor S1 when the output voltage is the first polarity (negative polarity) and the comparison voltage is larger than the oscillation signal. Turn on.
  • the negative side component of the output voltage of the single-phase AC generator A is supplied to the plurality of LED elements A when the negative side component becomes a predetermined magnitude (target voltage) or more.
  • the LED lamp lighting control circuit 200 (comparator COMP) turns off the first thyristor S1 when the output voltage has the second polarity (positive polarity).
  • the other operations of the LED lamp lighting control circuit 200 are the same as the operations of the LED lamp lighting control circuit 100 shown in the first embodiment.
  • the LED lamp lighting control circuit according to the present embodiment is similar to the first embodiment in that the first input terminal is connected to the first input terminal and the other end is connected to the second input terminal.
  • a switch element first thyristor
  • a first control circuit for controlling the first switch element and a second switch element having one end connected to the output terminal and the other end connected to the first input terminal (Second thyristor) and a second control circuit for controlling the second switch element.
  • the first control circuit sets the first switch element when the output voltage of the first input terminal output from the single-phase AC generator is the first polarity (negative polarity). Turn on. On the other hand, as in the first embodiment, the first control circuit turns off the first switch element when the output voltage has the second polarity (positive polarity).
  • the output voltage of the first polarity (negative polarity) of the first input terminal output from the single-phase AC generator is supplied to the LED lamp.
  • the output voltage of the second polarity (positive polarity) of the first input terminal output from the single-phase AC generator is not supplied to the LED lamp (LED element A).
  • the negative component of the electric power generated by the single-phase AC generator is supplied to the LED lamp.
  • the current is limited by the first switch element (first thyristor).
  • the LED lamp lighting control circuit according to the present invention has been a problem in the prior art even when a negative surge occurs from a load or the like, or when a reverse voltage at the time of reverse connection of the battery B is applied. Then, an additional diode for protecting the LED element is not necessary.
  • the LED B when the LED B is turned on by limiting the output current of the battery B, the number of LEDs connected in series increases and the total forward drop voltage VF of the LED is 12 V or more. Then, the LED element cannot be turned on. For example, since the forward voltage drop VF of the white LED is 3 to 4 V per one, it cannot be lit with four or more connected in series.
  • the single-phase AC generator is usually designed so that the peak voltage is higher than the battery voltage in order to charge the battery. For example, a voltage of about 20 V at 1000 rpm and about 30 V at 1500 rpm is generated so that the amount of charge can be secured even when the rotational speed of the single-phase AC generator is low, such as idling. Since the LED element can be lit using this voltage, even four or more LED elements connected in series can be lit.
  • the LED lamp lighting control circuit reduces the power consumption by applying the LED lamp to the lamp, thereby reducing the load of the single-phase AC generator, It can be applied to a vehicle not equipped with a battery.
  • FIG. 3 is a diagram illustrating an example of the configuration of the LED lamp lighting control system 3000 according to the third embodiment which is an aspect of the present invention.
  • the same reference numerals as those in FIG. 1 indicate the same configurations as those in the first embodiment.
  • the LED lamp lighting control system 3000 includes a battery B, a single-phase AC generator G, an LED lamp lighting control circuit 300, a plurality of LED elements A, and a limiting resistor RX.
  • the configuration of the LED lamp lighting control system 3000 shown in FIG. 3 is the same as that of the LED lamp lighting control system 1000 shown in FIG.
  • the LED lamp lighting control circuit 300 includes a first input terminal TIN1, a second input terminal TIN2, an output terminal TOUT, a ground terminal TG, and a first switch.
  • An element (first thyristor) S1, a second switch element (second thyristor) S2, a first control circuit CON1, and a second control circuit CON2 are provided.
  • the configuration of the LED lamp lighting control circuit 300 shown in FIG. 3 is the same as that of the LED lamp lighting control circuit 100 shown in FIG. 1 except that the configuration of the first control circuit CON1 is specifically described. .
  • the first control circuit CON1 includes a first diode D1, a second diode D2, a third diode D3, a first resistor R1, a second resistor R2, The third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the first capacitor C1, the second capacitor C2, the Schottky barrier diode DX, 1 PNP-type bipolar transistor Tr1 and second PNP-type bipolar transistor Tr2.
  • the first resistor R1 has one end connected to the second input terminal TIN2.
  • the cathode of the first diode D1 is connected to the other end of the first resistor R1.
  • the second resistor R2 has one end connected to the anode of the first diode D1 and the other end connected to the ground terminal TG.
  • the first capacitor C1 is connected in parallel with the second resistor R2 between the anode of the first diode D1 and the ground terminal TG.
  • the third resistor R3 has one end connected to the anode of the first diode D1.
  • the anode of the Schottky barrier diode DX is connected to the other end of the third resistor R3.
  • the target voltage of the output voltage that causes the LED element A to emit light can be adjusted by adjusting the breakdown voltage of the Schottky barrier diode DX.
  • the fourth resistor R4 has one end connected to the cathode of the Schottky barrier diode DX and the other end connected to the ground terminal TG.
  • the cathode of the second diode D2 is connected to the first input terminal TIN1.
  • the fifth resistor R5 has one end connected to the anode of the second diode D2.
  • the first PNP bipolar transistor Tr1 has a collector connected to the other end of the fifth resistor R5, an emitter connected to the ground terminal TG, and a base connected to the cathode of the Schottky barrier diode DX.
  • the sixth resistor R6 has one end connected to the gate of the first thyristor S1.
  • the third diode D3 has a cathode connected to the other end of the sixth resistor R6.
  • the second PNP bipolar transistor Tr2 has a collector connected to the anode of the third diode D3, an emitter connected to the ground terminal TG, and a base connected to the collector of the first PNP bipolar transistor Tr1.
  • the second capacitor C2 has one end connected to the second input terminal TIN2 and the other end connected to the ground terminal TG.
  • the second capacitor C2 stores electric power for causing the LED element A to emit light. Therefore, the capacitance value of the second capacitor C2 is set to be larger than the capacitance value of the first capacitor C1.
  • the limiting resistor RX for limiting the current is connected in series with the LED element A between the second input terminal TIN2 and the ground.
  • the output voltage is the first polarity (negative polarity)
  • the Schottky barrier diode DX is turned off and the first PNP-type bipolar transistor Tr1 is turned off.
  • the second PNP bipolar transistor Tr2 is turned on.
  • the first thyristor S1 is turned on, and the LED element A emits light when a first polarity (negative polarity) current flows, and the second capacitor C2 is charged. That is, the LED lamp lighting control circuit 300 turns on the first thyristor S1 when the output voltage is the first polarity (negative polarity).
  • the first thyristor S1 is turned off.
  • the LED element A emits light by the electric power stored in the second capacitor C2.
  • the first thyristor S1 when the output voltage is the first polarity (negative polarity), the first thyristor S1 can be controlled to be turned off.
  • the second PNP-type bipolar transistor Tr2 is turned off.
  • the first thyristor S1 is turned off.
  • the LED element A emits light by the electric power stored in the second capacitor C2.
  • the LED lamp lighting control circuit 300 is configured to turn off the first thyristor S1 when the output voltage has the second polarity (positive polarity).
  • the other operations of the LED lamp lighting control circuit 300 are the same as the operations of the LED lamp lighting control circuit 100 shown in the first embodiment.
  • the LED lamp lighting control circuit according to the present embodiment is similar to the first embodiment in that the first input terminal is connected to the first input terminal and the other end is connected to the second input terminal.
  • a switch element first thyristor
  • a first control circuit for controlling the first switch element and a second switch element having one end connected to the output terminal and the other end connected to the first input terminal (Second thyristor) and a second control circuit for controlling the second switch element.
  • the first control circuit sets the first switch element when the output voltage of the first input terminal output from the single-phase AC generator is the first polarity (negative polarity). Turn on. On the other hand, as in the first embodiment, the first control circuit turns off the first switch element when the output voltage has the second polarity (positive polarity).
  • the output voltage of the first polarity (negative polarity) of the first input terminal output from the single-phase AC generator is supplied to the LED lamp.
  • the output voltage of the second polarity (positive polarity) of the first input terminal output from the single-phase AC generator is not supplied to the LED lamp (LED element A).
  • the negative component of the electric power generated by the single-phase AC generator is supplied to the LED lamp.
  • the current is limited by the first switch element (first thyristor).
  • the LED lamp lighting control circuit according to the present invention has been a problem in the prior art even when a negative surge occurs from a load or the like, or when a reverse voltage at the time of reverse connection of the battery B is applied. Then, an additional diode for protecting the LED element is not necessary.
  • the LED B when the LED B is turned on by limiting the output current of the battery B, the number of LEDs connected in series increases and the total forward drop voltage VF of the LED is 12 V or more. Then, the LED element cannot be turned on. For example, since the forward voltage drop VF of the white LED is 3 to 4 V per one, it cannot be lit with four or more connected in series.
  • the single-phase AC generator is usually designed so that the peak voltage is higher than the battery voltage in order to charge the battery. For example, a voltage of about 20 V at 1000 rpm and about 30 V at 1500 rpm is generated so that the amount of charge can be secured even when the rotational speed of the single-phase AC generator is low, such as idling. Since the LED element can be lit using this voltage, even four or more LED elements connected in series can be lit.
  • the LED lamp lighting control circuit reduces the power consumption by applying the LED lamp to the lamp, thereby reducing the load of the single-phase AC generator, It can be applied to a vehicle not equipped with a battery.

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Abstract

An LED lamp lighting control circuit of the present invention is provided with the following: a first input terminal to which is connected one end of a coil of a single-phase alternating current power generator the other end of which is connected to a ground; a second input terminal to which is connected a cathode side of an LED element an anode side of which is connected to the ground; an output terminal to which a load is connected; a ground terminal to which the ground is connected; a first switch element one end of which is connected to the first input terminal and the other end of which is connected to the second input terminal; a first control circuit for controlling the first switch element; a second switch element one end of which is connected to the output terminal and the other end of which is connected to the first input terminal; and a second control circuit for controlling the second switch element.

Description

ＬＥＤランプ点灯制御回路、および、ＬＥＤランプ点灯制御方法LED lamp lighting control circuit and LED lamp lighting control method
　本発明は、ＬＥＤランプ点灯制御回路、および、ＬＥＤランプ点灯制御方法に関する。 The present invention relates to an LED lamp lighting control circuit and an LED lamp lighting control method.
　従来、例えば、２輪車などのヘッドランプは、一般的に、バルブなどのランプが用いられている（例えば、特許第４５９７１９４号、特許第４４８０８１７号参照。）。 Conventionally, for example, lamps such as bulbs are generally used for headlamps such as motorcycles (see, for example, Japanese Patent No. 4597194 and Japanese Patent No. 4480817).
　しかし、上記従来技術で適用されるバルブランプは、消費電力が大きい問題がある。そこで、２輪車などのヘッドランプに抵抗値が小さいＬＥＤランプの適用が考えられる。 However, the bulb lamp applied in the above prior art has a problem of large power consumption. Therefore, it is conceivable to apply an LED lamp having a small resistance value to a headlamp such as a motorcycle.
　ここで、従来のＬＥＤランプのＬＥＤランプ点灯制御回路１００Ａは、単相交流発電機ＧのコイルＬに接続されたダイオードおよびサイリスタで構成される整流回路と、この整流回路を制御する制御回路ＣＯＮと、を備える（図４）。 Here, the LED lamp lighting control circuit 100A of the conventional LED lamp includes a rectifier circuit composed of a diode and a thyristor connected to the coil L of the single-phase AC generator G, and a control circuit CON that controls the rectifier circuit. (FIG. 4).
　このＬＥＤランプ点灯制御回路１００Ａは、制御回路ＣＯＮにより整流回路を制御して、単相交流発電機Ｇで発電した電力をバッテリＢに充電し、このバッテリＢからＬＥＤランプに電力を供給する。 The LED lamp lighting control circuit 100A controls the rectifier circuit by the control circuit CON, charges the battery B with the electric power generated by the single-phase AC generator G, and supplies the electric power from the battery B to the LED lamp.
　しかし、上記従来のＬＥＤランプ点灯制御回路１００Ａでは、例えば、ＬＥＤランプの逆電圧ＶＲが低く、負荷などから負サージが発生した場合、または、バッテリＢの逆接時の逆電圧が印加された場合などにおいて、ＬＥＤ素子を保護するためのダイオードが別途必要になる。 However, in the conventional LED lamp lighting control circuit 100A, for example, when the reverse voltage VR of the LED lamp is low and a negative surge occurs from a load or the like, or when a reverse voltage at the time of reverse connection of the battery B is applied, etc. In this case, a diode for protecting the LED element is required separately.
　また、上記従来のＬＥＤランプ点灯制御回路１００Ａでは、ＬＥＤ素子に電力を供給するためのバッテリＢが必要となるため、バッテリＢを搭載しない車両には適用できない。 In addition, the conventional LED lamp lighting control circuit 100A requires a battery B for supplying power to the LED elements, and therefore cannot be applied to a vehicle not equipped with the battery B.
　本発明の一態様に係る実施例に従ったＬＥＤランプ点灯制御回路は、
　一端が接地に接続された単相交流発電機のコイルの他端が、接続される第１の入力端子と、
　アノード側が前記接地に接続されたＬＥＤ素子のカソード側が、接続される第２の入力端子と、
　負荷が接続される出力端子と、
　前記接地が接続される接地端子と、
　前記第１の入力端子に一端が接続され、前記第２の入力端子に他端が接続された第１のスイッチ素子と、
　前記第１のスイッチ素子を制御する第１の制御回路と、
　前記出力端子に一端が接続され、前記第１の入力端子に他端が接続された第２のスイッチ素子と、
　前記第２のスイッチ素子を制御する第２の制御回路と、を備え、
　前記第１の制御回路は、
　前記単相交流発電機から出力された前記第１の入力端子の出力電圧が第１極性の場合において、前記第１のスイッチ素子をオンし、
　一方、前記出力電圧が第２極性の場合において、前記第１のスイッチ素子をオフすることを特徴とする。 An LED lamp lighting control circuit according to an embodiment according to one aspect of the present invention includes:
A first input terminal to which the other end of the coil of the single-phase AC generator having one end connected to the ground is connected;
A second input terminal to which the cathode side of the LED element whose anode side is connected to the ground is connected;
An output terminal to which a load is connected;
A ground terminal to which the ground is connected;
A first switch element having one end connected to the first input terminal and the other end connected to the second input terminal;
A first control circuit for controlling the first switch element;
A second switch element having one end connected to the output terminal and the other end connected to the first input terminal;
A second control circuit for controlling the second switch element,
The first control circuit includes:
When the output voltage of the first input terminal output from the single-phase AC generator has a first polarity, the first switch element is turned on,
On the other hand, when the output voltage has the second polarity, the first switch element is turned off.
　前記ＬＥＤランプ点灯制御回路において、
　前記第１極性は、負の極性であり、
　前記第２極性は、正の極性であり、
　前記第１のスイッチ素子は、前記第１の入力端子にカソードが接続され、前記第２の入力端子にアノードが接続された第１のサイリスタであり、
　前記第２のスイッチ素子は、前記出力端子にカソードが接続され、前記第１の入力端子にアノードが接続された第２のサイリスタである
　ことを特徴とする。 In the LED lamp lighting control circuit,
The first polarity is a negative polarity;
The second polarity is a positive polarity;
The first switch element is a first thyristor having a cathode connected to the first input terminal and an anode connected to the second input terminal;
The second switch element is a second thyristor having a cathode connected to the output terminal and an anode connected to the first input terminal.
　前記ＬＥＤランプ点灯制御回路において、
　前記第２の入力端子と前記接地との間で、電流を制限する制限抵抗が、前記ＬＥＤ素子と直列に、接続されている
　ことを特徴とする。 In the LED lamp lighting control circuit,
A limiting resistor for limiting a current is connected in series with the LED element between the second input terminal and the ground.
　前記ＬＥＤランプ点灯制御回路において、
　前記第１の制御回路は、
　前記単相交流発電機から出力された前記第１の入力端子の出力電圧が第１極性の場合において、前記出力電圧の大きさが目標電圧以上になると、前記第１のサイリスタをオンすることを特徴とする。 In the LED lamp lighting control circuit,
The first control circuit includes:
In the case where the output voltage of the first input terminal output from the single-phase AC generator has the first polarity, the first thyristor is turned on when the magnitude of the output voltage exceeds a target voltage. Features.
　前記ＬＥＤランプ点灯制御回路において、
　前記第１の制御回路は、
　前記第２の入力端子に一端が接続された第１の分圧抵抗と、
　前記第１の分圧抵抗の他端に一端が接続され、前記接地端子に他端が接続された第２の分圧抵抗と、
　前記第１の分圧抵抗の他端にアノードが接続されたダイオードと、
　前記ダイオードのカソードと前記接地端子との間に接続された平均化コンデンサと、
　ノコギリ波または三角波である発振信号を生成し出力する発振回路と、
　前記ダイオードのカソードに一端が接続された平均化抵抗と、
　前記発振信号と前記平均化抵抗の他端の比較電圧とが入力され、前記発振信号と前記比較電圧とを比較した結果に基づいて、前記第１のサイリスタを制御するコンパレータと、を有する
　ことを特徴とする。 In the LED lamp lighting control circuit,
The first control circuit includes:
A first voltage dividing resistor having one end connected to the second input terminal;
A second voltage dividing resistor having one end connected to the other end of the first voltage dividing resistor and the other end connected to the ground terminal;
A diode having an anode connected to the other end of the first voltage dividing resistor;
An averaging capacitor connected between the cathode of the diode and the ground terminal;
An oscillation circuit that generates and outputs an oscillation signal that is a sawtooth or triangular wave;
An averaging resistor having one end connected to the cathode of the diode;
A comparator for controlling the first thyristor based on a result of comparison between the oscillation signal and the comparison voltage, the oscillation signal and a comparison voltage at the other end of the averaging resistor being input. Features.
　前記ＬＥＤランプ点灯制御回路において、
　前記コンパレータは、
　前記出力電圧が負の極性の場合において、前記比較電圧の大きさが前記発振信号の大きさ未満のときは、前記第１のサイリスタをオフし、前記比較電圧の大きさが前記発振信号の大きさ以上のときは、前記第１のサイリスタをオンし、
　一方、前記出力電圧が正の極性の場合において、前記第１のサイリスタをオフする
　ことを特徴とする。 In the LED lamp lighting control circuit,
The comparator is
When the output voltage has a negative polarity and the magnitude of the comparison voltage is less than the magnitude of the oscillation signal, the first thyristor is turned off, and the magnitude of the comparison voltage is the magnitude of the oscillation signal. If this is the case, turn on the first thyristor,
On the other hand, when the output voltage has a positive polarity, the first thyristor is turned off.
　前記ＬＥＤランプ点灯制御回路において、
　前記第１の制御回路は、前記コンパレータの出力と前記サイリスタのゲートとの間に接続された抵抗をさらに有する
　ことを特徴とする。 In the LED lamp lighting control circuit,
The first control circuit further includes a resistor connected between the output of the comparator and the gate of the thyristor.
　前記ＬＥＤランプ点灯制御回路において、
　前記第１の制御回路は、
　前記第２の入力端子に一端が接続された第１の抵抗と、
　前記第１の抵抗の他端にカソードが接続された第１のダイオードと、
　前記第１のダイオードのアノードに一端が接続され、前記接地端子に他端が接続された第２の抵抗と、
　前記第１のダイオードのアノードと前記接地端子との間で、前記第２の抵抗と並列に接続された第１のコンデンサと、
　前記第１のダイオードのアノードに一端が接続された第３の抵抗と、
　前記第３の抵抗の他端にアノードが接続されたショットキーバリアダイオードと、
　前記ショットキーバリアダイオードのカソードに一端が接続され、前記接地端子に他端が接続された第４の抵抗と、
　前記第１の入力端子にカソードが接続された第２のダイオードと、
　前記第２のダイオードのアノードに一端が接続された第５の抵抗と、
　前記第５の抵抗の他端にコレクタが接続され、前記接地端子にエミッタが接続され、前記ショットキーバリアダイオードのカソードにベースが接続された第１のＰＮＰ型バイポーラトランジスタと、
　前記第１のサイリスタのゲートに一端が接続された第６の抵抗と、前記第６の抵抗の他端にカソードが接続された第３のダイオードと、
　前記第３のダイオードのアノードにコレクタが接続され、前記接地端子にエミッタが接続され、前記第１のＰＮＰ型バイポーラトランジスタのコレクタにベースが接続された第２のＰＮＰ型バイポーラトランジスタと、
　前記第２の入力端子に一端が接続され、前記接地端子に他端が接続された第２のコンデンサと、を有する
　ことを特徴とする。 In the LED lamp lighting control circuit,
The first control circuit includes:
A first resistor having one end connected to the second input terminal;
A first diode having a cathode connected to the other end of the first resistor;
A second resistor having one end connected to the anode of the first diode and the other end connected to the ground terminal;
A first capacitor connected in parallel with the second resistor between the anode of the first diode and the ground terminal;
A third resistor having one end connected to the anode of the first diode;
A Schottky barrier diode having an anode connected to the other end of the third resistor;
A fourth resistor having one end connected to the cathode of the Schottky barrier diode and the other end connected to the ground terminal;
A second diode having a cathode connected to the first input terminal;
A fifth resistor having one end connected to the anode of the second diode;
A first PNP-type bipolar transistor having a collector connected to the other end of the fifth resistor, an emitter connected to the ground terminal, and a base connected to the cathode of the Schottky barrier diode;
A sixth resistor having one end connected to the gate of the first thyristor; a third diode having a cathode connected to the other end of the sixth resistor;
A second PNP bipolar transistor having a collector connected to the anode of the third diode, an emitter connected to the ground terminal, and a base connected to the collector of the first PNP bipolar transistor;
And a second capacitor having one end connected to the second input terminal and the other end connected to the ground terminal.
　前記ＬＥＤランプ点灯制御回路において、
　前記第２の入力端子と前記接地との間で、電流を制限する制限抵抗が、前記ＬＥＤ素子と直列に、接続されている
　ことを特徴とする。 In the LED lamp lighting control circuit,
A limiting resistor for limiting a current is connected in series with the LED element between the second input terminal and the ground.
　前記ＬＥＤランプ点灯制御回路において、
　前記第２のコンデンサの容量値は、前記第１のコンデンサの容量値よりも大きいことを特徴とする。 In the LED lamp lighting control circuit,
The capacitance value of the second capacitor is larger than the capacitance value of the first capacitor.
　前記ＬＥＤランプ点灯制御回路において、
　前記第２の制御回路は、前記第１の入力端子と前記接地端子との間の電圧、及び前記出力端子と前記接地端子との間の電圧に基づいて、前記第２のスイッチ素子を制御する
　ことを特徴とする。 In the LED lamp lighting control circuit,
The second control circuit controls the second switch element based on a voltage between the first input terminal and the ground terminal and a voltage between the output terminal and the ground terminal. It is characterized by that.
　前記ＬＥＤランプ点灯制御回路において、
　前記出力端子と前記接地端子との間にバッテリが接続されることを特徴とする。 In the LED lamp lighting control circuit,
A battery is connected between the output terminal and the ground terminal.
　前記ＬＥＤランプ点灯制御回路において、
　前記第２の制御回路は、
　前記出力電圧が正の極性の場合において、前記出力端子と前記接地との間に接続されたバッテリの充電電圧が規定電圧未満のときは、前記第２のサイリスタをオンし、一方、前記充電電圧が前記規定電圧以上のときは、前記第２のサイリスタをオフする
　ことを特徴とする。 In the LED lamp lighting control circuit,
The second control circuit includes:
When the output voltage has a positive polarity and the charging voltage of the battery connected between the output terminal and the ground is less than a specified voltage, the second thyristor is turned on, while the charging voltage When is equal to or higher than the specified voltage, the second thyristor is turned off.
　前記ＬＥＤランプ点灯制御回路において、
　前記第２の入力端子と前記接地との間で、複数の前記ＬＥＤ素子が直列に接続されている
　ことを特徴とする。 In the LED lamp lighting control circuit,
A plurality of the LED elements are connected in series between the second input terminal and the ground.
　本発明の一態様に係る実施例に従ったＬＥＤランプ点灯制御方法は、
　一端が接地に接続された単相交流発電機のコイルの他端が、接続される第１の入力端子と、アノード側が前記接地に接続されたＬＥＤ素子のカソード側が、接続される第２の入力端子と、負荷が接続される出力端子と、前記接地が接続される接地端子と、前記第１の入力端子に一端が接続され、前記第２の入力端子に他端が接続された第１のスイッチ素子と、前記第１のスイッチ素子を制御する第１の制御回路と、前記出力端子に一端が接続され、前記第１の入力端子に他端が接続された第２のスイッチ素子と、前記第２のスイッチ素子を制御する第２の制御回路と、を備えたＬＥＤランプ点灯制御回路によるＬＥＤランプ点灯制御方法であって、
　前記単相交流発電機から出力された前記第１の入力端子の出力電圧が第１極性の場合において、前記出力電圧の大きさが目標電圧以上になると、前記第１の制御回路により、前記第１のスイッチ素子をオンし、
　一方、前記出力電圧が第２極性の場合において、前記第１の制御回路により、前記第１のスイッチ素子をオフする
　ことを特徴とする。 An LED lamp lighting control method according to an embodiment according to an aspect of the present invention includes:
A first input terminal to which the other end of the coil of the single-phase AC generator whose one end is connected to the ground is connected, and a second input to which the cathode side of the LED element whose anode side is connected to the ground is connected A first terminal having one end connected to the first input terminal and the other end connected to the second input terminal; an output terminal to which a load is connected; a ground terminal to which the ground is connected; A switch element; a first control circuit that controls the first switch element; a second switch element having one end connected to the output terminal and the other end connected to the first input terminal; A second control circuit for controlling the second switch element, and an LED lamp lighting control method by an LED lamp lighting control circuit comprising:
In the case where the output voltage of the first input terminal output from the single-phase AC generator has the first polarity, and the magnitude of the output voltage is equal to or higher than a target voltage, the first control circuit causes the first control circuit to 1 switch element is turned on,
On the other hand, when the output voltage has the second polarity, the first control circuit turns off the first switch element.
　本発明の一態様に係るＬＥＤランプ点灯制御回路は、第１の入力端子に一端が接続され、第２の入力端子に他端が接続された第１のスイッチ素子（第１のサイリスタ）と、第１のスイッチ素子を制御する第１の制御回路と、出力端子に一端が接続され、第１の入力端子に他端が接続された第２のスイッチ素子（第２のサイリスタ）と、第２のスイッチ素子を制御する第２の制御回路と、を備える。 An LED lamp lighting control circuit according to an aspect of the present invention includes a first switch element (first thyristor) having one end connected to a first input terminal and the other end connected to a second input terminal; A first control circuit for controlling the first switch element; a second switch element (second thyristor) having one end connected to the output terminal and the other end connected to the first input terminal; And a second control circuit for controlling the switch element.
　第１の制御回路は、単相交流発電機から出力された第１の入力端子の出力電圧が第１極性（負の極性）の場合において、第１のスイッチ素子をオンする。一方、第１の制御回路は、出力電圧が第２極性（正の極性）の場合において、第１のスイッチ素子をオフする。 The first control circuit turns on the first switch element when the output voltage of the first input terminal output from the single-phase AC generator has the first polarity (negative polarity). On the other hand, the first control circuit turns off the first switch element when the output voltage has the second polarity (positive polarity).
　これにより、単相交流発電機から出力された第１の入力端子の第１極性（負の極性）の出力電圧がＬＥＤランプに供給される。一方、単相交流発電機から出力された第１の入力端子の第２極性（正の極性）の出力電圧はＬＥＤランプに供給されない。すなわち、単相交流発電機で発電された電力の負の成分がＬＥＤランプに供給される。 Thereby, the output voltage of the first polarity (negative polarity) of the first input terminal output from the single-phase AC generator is supplied to the LED lamp. On the other hand, the output voltage of the second polarity (positive polarity) of the first input terminal output from the single-phase AC generator is not supplied to the LED lamp. That is, the negative component of the electric power generated by the single-phase AC generator is supplied to the LED lamp.
　さらに、本発明に係るＬＥＤランプ点灯制御回路では、第１のスイッチ素子（第１のサイリスタ）により電流が制限される。 Furthermore, in the LED lamp lighting control circuit according to the present invention, the current is limited by the first switch element (first thyristor).
　このため、従来技術において課題となっていた、負荷などから負サージが発生した場合、または、バッテリＢの逆接時の逆電圧が印加される場合などにおいても、本発明に係るＬＥＤランプ点灯制御回路では、ＬＥＤ素子を保護するための追加のダイオードが、不要になる。 For this reason, the LED lamp lighting control circuit according to the present invention has been a problem in the prior art even when a negative surge occurs from a load or the like, or when a reverse voltage at the time of reverse connection of the battery B is applied. Then, an additional diode for protecting the LED element is not necessary.
　したがって、本発明に係るＬＥＤランプ点灯制御回路は、ランプにＬＥＤランプを適用して消費電力を低減することにより、単相交流発電機の負荷の低減を図りつつ、バッテリを搭載しない車両にも適用可能にすることができる。 Therefore, the LED lamp lighting control circuit according to the present invention is also applied to a vehicle not equipped with a battery while reducing the power consumption by applying the LED lamp to the lamp to reduce the power consumption. Can be possible.
図１は、本発明の一態様である実施例１に係るＬＥＤランプ点灯制御システム１０００の構成の一例を示す図である。FIG. 1 is a diagram illustrating an example of a configuration of an LED lamp lighting control system 1000 according to a first embodiment which is an aspect of the present invention. 図２は、本発明の一態様である実施例２に係るＬＥＤランプ点灯制御システム２０００の構成の一例を示す図である。FIG. 2 is a diagram illustrating an example of the configuration of the LED lamp lighting control system 2000 according to the second embodiment which is an aspect of the present invention. 図３は、本発明の一態様である実施例３に係るＬＥＤランプ点灯制御システム３０００の構成の一例を示す図である。FIG. 3 is a diagram illustrating an example of a configuration of an LED lamp lighting control system 3000 according to a third embodiment which is an aspect of the present invention. 図４は、従来のＬＥＤランプ点灯制御システム１０００Ａの構成の一例を示す図である。FIG. 4 is a diagram showing an example of the configuration of a conventional LED lamp lighting control system 1000A.
　以下、本発明に係る各実施例について図面に基づいて説明する。 Hereinafter, each embodiment according to the present invention will be described with reference to the drawings.
　図１は、本発明の一態様である実施例１に係るＬＥＤランプ点灯制御システム１０００の構成の一例を示す図である。 FIG. 1 is a diagram illustrating an example of a configuration of an LED lamp lighting control system 1000 according to a first embodiment which is an aspect of the present invention.
　図１に示すように、ＬＥＤランプ点灯制御システム１０００は、バッテリＢと、単相交流発電機Ｇと、ＬＥＤランプ点灯制御回路１００と、複数のＬＥＤ素子Ａと、制限抵抗ＲＸと、を備える。 As shown in FIG. 1, the LED lamp lighting control system 1000 includes a battery B, a single-phase AC generator G, an LED lamp lighting control circuit 100, a plurality of LED elements A, and a limiting resistor RX.
　単相交流発電機Ｇは、一端が接地に接続され且つ他端がＬＥＤランプ点灯制御回路１００の第１の入力端子ＴＩＮ１に接続されたコイルＬを、有する。 The single-phase AC generator G has a coil L having one end connected to the ground and the other end connected to the first input terminal TIN1 of the LED lamp lighting control circuit 100.
　この単相交流発電機Ａは、バッテリＢを充電するとともにＬＥＤ素子Ａを点灯するための交流電圧を発生し出力するようになっている。 The single-phase AC generator A is configured to charge the battery B and generate and output an AC voltage for lighting the LED element A.
　この単相交流発電機Ａは、例えば、２輪車のエンジンに直結駆動されるオルタネータである。 This single-phase AC generator A is, for example, an alternator that is directly connected to a motorcycle engine.
　バッテリＢは、出力端子ＴＯＵＴと接地端子ＴＧとの間に接続されている。 The battery B is connected between the output terminal TOUT and the ground terminal TG.
　このバッテリＢは、＋端子（正側）と－端子（負側）を有し、これらの端子を介して充放電可能になっている。このバッテリＢは、例えば、２輪車のバッテリである。 This battery B has a positive terminal (positive side) and a negative terminal (negative side), and can be charged / discharged through these terminals. This battery B is a battery of a two-wheeled vehicle, for example.
　複数のＬＥＤ素子Ａは、ＬＥＤランプ点灯制御回路１００の第２の入力端子ＴＩＮ２と接地との間で、直列に接続されている。 The plurality of LED elements A are connected in series between the second input terminal TIN2 of the LED lamp lighting control circuit 100 and the ground.
　ＬＥＤ素子Ａは、例えば、２輪車のヘッドライト、テールランプ等のランプである。 The LED element A is a lamp such as a headlight or a tail lamp of a two-wheeled vehicle.
　制限抵抗ＲＸは、第２の入力端子ＴＩＮ２と接地との間で、ＬＥＤ素子Ａと直列に、接続されている。 The limiting resistor RX is connected in series with the LED element A between the second input terminal TIN2 and the ground.
　この制限抵抗ＲＸは、ＬＥＤ素子Ａに流れる電流を制限するようになっている。　
　なお、負荷（図示せず）は、接地と出力端子ＴＯＵＴとの間に接続されるようになっている。この負荷は、例えば、２輪車において電源を必要とする機器等の車両負荷である。 The limiting resistor RX limits the current flowing through the LED element A.
A load (not shown) is connected between the ground and the output terminal TOUT. This load is, for example, a vehicle load such as equipment that requires a power source in a two-wheeled vehicle.
　また、ＬＥＤランプ点灯制御回路１００は、例えば、図１に示すように、第１の入力端子ＴＩＮ１と、第２の入力端子ＴＩＮ２と、出力端子ＴＯＵＴと、接地端子ＴＧと、第１のスイッチ素子（第１のサイリスタ）Ｓ１と、第２のスイッチ素子（第２のサイリスタ）Ｓ２と、第１の制御回路ＣＯＮ１と、第２の制御回路ＣＯＮ２と、を備える。 Further, for example, as shown in FIG. 1, the LED lamp lighting control circuit 100 includes a first input terminal TIN1, a second input terminal TIN2, an output terminal TOUT, a ground terminal TG, and a first switch element. (First thyristor) S1, a second switch element (second thyristor) S2, a first control circuit CON1, and a second control circuit CON2.
　なお、以下では、便宜的に、第１のスイッチ素子Ｓ１を、第１のサイリスタＳ１と表記し、第２のスイッチ素子Ｓ２を、第２のサイリスタＳ２と表記する場合がある。 In the following description, for convenience, the first switch element S1 may be referred to as a first thyristor S1, and the second switch element S2 may be referred to as a second thyristor S2.
　第１の入力端子ＴＩＮ１は、一端が接地に接続された単相交流発電機ＧのコイルＬの他端が、接続されるようになっている。 The first input terminal TIN1 is connected to the other end of the coil L of the single-phase AC generator G whose one end is connected to the ground.
　第２の入力端子ＴＩＮ２は、アノード側が接地に接続されたＬＥＤ素子Ａのカソード側が、接続されるようになっている。 The second input terminal TIN2 is connected to the cathode side of the LED element A whose anode side is connected to the ground.
　出力端子ＴＯＵＴは、負荷（図示せず）が接続されるようになっている。 The output terminal TOUT is connected to a load (not shown).
　接地端子ＴＧは、接地が接続されるようになっている。 The ground terminal TG is connected to the ground.
　第１のスイッチ素子Ｓ１は、第１の入力端子ＴＩＮ１に一端が接続され、第２の入力端子ＴＩＮ２に他端が接続されている。 The first switch element S1 has one end connected to the first input terminal TIN1 and the other end connected to the second input terminal TIN2.
　この第１のスイッチ素子Ｓ１は、例えば、第１の入力端子ＴＩＮ１にカソードが接続され、第２の入力端子ＴＩＮ２にアノードが接続された第１のサイリスタである。 The first switch element S1 is, for example, a first thyristor having a cathode connected to the first input terminal TIN1 and an anode connected to the second input terminal TIN2.
　第１の制御回路ＣＯＮ１は、第１のスイッチ素子（第１のサイリスタ）Ｓ１のゲートに信号を出力することにより、第１のスイッチ素子Ｓ１を制御するようになっている。 The first control circuit CON1 controls the first switch element S1 by outputting a signal to the gate of the first switch element (first thyristor) S1.
　例えば、第１の制御回路ＣＯＮ１は、単相交流発電機Ｇから出力された第１の入力端子ＴＩＮ１の出力電圧が第１極性（負の極性）の場合において、例えば、出力電圧の大きさが目標電圧以上になると、第１のスイッチ素子Ｓ１をオンするようになっている。 For example, when the output voltage of the first input terminal TIN1 output from the single-phase AC generator G is the first polarity (negative polarity), the first control circuit CON1 has, for example, the magnitude of the output voltage. When the voltage exceeds the target voltage, the first switch element S1 is turned on.
　一方、第１の制御回路ＣＯＮ１は、出力電圧が第２極性（正の極性）の場合において、第１のスイッチ素子Ｓ１をオフするようになっている。 On the other hand, the first control circuit CON1 is configured to turn off the first switch element S1 when the output voltage has the second polarity (positive polarity).
　なお、後述の実施例のように、出力電圧が第１極性（負の極性）の場合に、ＬＥＤ素子Ａに電力を供給するコンデンサ（図示せず）に所定レベルの電荷が充電されるまで、第１のスイッチ素子Ｓ１をオンするようにしてもよい。この場合、上記コンデンサに、所定レベルの電荷が充電された後、このコンデンサがある程度放電する（コンデンサがＬＥＤ素子Ａにある程度電力を供給する）まで、第１のスイッチ素子Ｓ１はオフされる。 In the case where the output voltage is the first polarity (negative polarity) as in the examples described later, until a predetermined level of charge is charged in a capacitor (not shown) that supplies power to the LED element A, The first switch element S1 may be turned on. In this case, after the capacitor is charged with a predetermined level of charge, the first switch element S1 is turned off until the capacitor is discharged to some extent (the capacitor supplies power to the LED element A to some extent).
　また、第２のスイッチ素子Ｓ２は、出力端子ＴＯＵＴに一端が接続され、第１の入力端子ＴＩＮ１に他端が接続されている。 Further, one end of the second switch element S2 is connected to the output terminal TOUT, and the other end is connected to the first input terminal TIN1.
　この第２のスイッチ素子Ｓ２は、出力端子ＴＯＵＴにカソードが接続され、第１の入力端子ＴＩＮ１にアノードが接続された第２のサイリスタである。 The second switch element S2 is a second thyristor having a cathode connected to the output terminal TOUT and an anode connected to the first input terminal TIN1.
　第２の制御回路ＣＯＮ２は、第２のスイッチ素子（第２のサイリスタ）Ｓ２のゲートに信号を出力することにより、第２のスイッチ素子（第２のサイリスタ）Ｓ２を制御するようになっている。 The second control circuit CON2 controls the second switch element (second thyristor) S2 by outputting a signal to the gate of the second switch element (second thyristor) S2. .
　この第２の制御回路ＣＯＮ２は、第１の入力端子ＴＩＮ１と接地端子ＴＧとの間の電圧、及び出力端子ＴＯＵＴと接地端子ＴＧとの間の電圧に基づいて、第２のスイッチ素子Ｓ２を制御するようになっている。 The second control circuit CON2 controls the second switch element S2 based on the voltage between the first input terminal TIN1 and the ground terminal TG and the voltage between the output terminal TOUT and the ground terminal TG. It is supposed to be.
　例えば、第２の制御回路ＣＯＮ２は、出力電圧が第２極性（正の極性）の場合において、出力端子ＴＯＵＴと接地との間に接続されたバッテリＢの充電電圧が規定電圧未満のときは、第２のサイリスタＳ２をオンするようになっている。 For example, when the output voltage is the second polarity (positive polarity) and the charging voltage of the battery B connected between the output terminal TOUT and the ground is less than the specified voltage, the second control circuit CON2 The second thyristor S2 is turned on.
　一方、第２の制御回路ＣＯＮ２は、バッテリＢの充電電圧が規定電圧以上のときは、第２のサイリスタＳ２をオフするようになっている。 On the other hand, the second control circuit CON2 is configured to turn off the second thyristor S2 when the charging voltage of the battery B is equal to or higher than the specified voltage.
　次に、以上のような構成を有するＬＥＤランプ点灯制御システム１０００におけるＬＥＤランプ点灯制御回路１００によるＬＥＤランプ点灯制御方法の一例について、説明する。 Next, an example of the LED lamp lighting control method by the LED lamp lighting control circuit 100 in the LED lamp lighting control system 1000 having the above configuration will be described.
　例えば、第１の制御回路ＣＯＮ１は、単相交流発電機Ｇから出力された第１の入力端子ＴＩＮ１の出力電圧が第１極性（負の極性）の場合において、例えば、出力電圧の大きさが目標電圧以上になると、第１のスイッチ素子Ｓ１をオンする。 For example, when the output voltage of the first input terminal TIN1 output from the single-phase AC generator G is the first polarity (negative polarity), the first control circuit CON1 has, for example, the magnitude of the output voltage. When the voltage exceeds the target voltage, the first switch element S1 is turned on.
　これにより、単相交流発電機Ａの出力電圧の負側の成分が複数のＬＥＤ素子Ａに供給される。 Thereby, the negative component of the output voltage of the single-phase AC generator A is supplied to the plurality of LED elements A.
　すなわち、ＬＥＤランプ点灯制御回路１００は、出力電圧が第１極性（負の極性）の場合において、出力電圧の大きさが目標電圧以上になると、ＬＥＤ素子Ａを点灯させる。 That is, when the output voltage is the first polarity (negative polarity), the LED lamp lighting control circuit 100 lights the LED element A when the magnitude of the output voltage is equal to or higher than the target voltage.
　一方、第１の制御回路ＣＯＮ１は、出力電圧が第２極性（正の極性）の場合において、第１のスイッチ素子Ｓ１をオフする。 On the other hand, the first control circuit CON1 turns off the first switch element S1 when the output voltage is the second polarity (positive polarity).
　これにより、単相交流発電機Ａの出力電圧の正側の成分が複数のＬＥＤ素子Ａに供給されない。 Thereby, the positive component of the output voltage of the single-phase AC generator A is not supplied to the plurality of LED elements A.
　また、例えば、第２の制御回路ＣＯＮ２は、出力電圧が第２の極性（正の極性）の場合において、出力端子ＴＯＵＴと接地との間に接続されたバッテリＢの充電電圧が規定電圧未満のときは、第２のサイリスタＳ２をオンする。 Further, for example, when the output voltage is the second polarity (positive polarity), the second control circuit CON2 is such that the charging voltage of the battery B connected between the output terminal TOUT and the ground is less than the specified voltage. When the second thyristor S2 is turned on.
　これにより、単相交流発電機Ａの出力電圧の正側の成分がバッテリＢに供給され、バッテリＢが充電される。 Thereby, the positive component of the output voltage of the single-phase AC generator A is supplied to the battery B, and the battery B is charged.
　また、第２の制御回路ＣＯＮ２は、バッテリＢの充電電圧が規定電圧以上のときは、第２のサイリスタＳ２をオフする。 The second control circuit CON2 turns off the second thyristor S2 when the charging voltage of the battery B is equal to or higher than the specified voltage.
　これにより、バッテリＢが過充電されないようになっている。 This prevents battery B from being overcharged.
　以上のように、本実施例に係るＬＥＤランプ点灯制御回路は、第１の入力端子に一端が接続され、第２の入力端子に他端が接続された第１のスイッチ素子（第１のサイリスタ）と、第１のスイッチ素子を制御する第１の制御回路と、出力端子に一端が接続され、第１の入力端子に他端が接続された第２のスイッチ素子（第２のサイリスタ）と、第２のスイッチ素子を制御する第２の制御回路と、を備える。 As described above, the LED lamp lighting control circuit according to the present embodiment has the first switch element (first thyristor) having one end connected to the first input terminal and the other end connected to the second input terminal. ), A first control circuit for controlling the first switch element, a second switch element (second thyristor) having one end connected to the output terminal and the other end connected to the first input terminal And a second control circuit for controlling the second switch element.
　第１の制御回路は、単相交流発電機から出力された第１の入力端子の出力電圧が第１極性（負の極性）の場合において、出力電圧が目標電圧以上になると、第１のスイッチ素子をオンする。一方、第１の制御回路は、出力電圧が第２極性（正の極性）の場合において、第１のスイッチ素子をオフする。 When the output voltage of the first input terminal output from the single-phase AC generator is the first polarity (negative polarity) and the output voltage becomes equal to or higher than the target voltage, the first control circuit Turn on the element. On the other hand, the first control circuit turns off the first switch element when the output voltage has the second polarity (positive polarity).
　これにより、単相交流発電機から出力された第１の入力端子の第１極性（負の極性）の出力電圧がＬＥＤランプに供給される。一方、単相交流発電機から出力された第１の入力端子の第２極性（正の極性）の出力電圧はＬＥＤランプ（ＬＥＤ素子Ａ）に供給されない。 Thereby, the output voltage of the first polarity (negative polarity) of the first input terminal output from the single-phase AC generator is supplied to the LED lamp. On the other hand, the output voltage of the second polarity (positive polarity) of the first input terminal output from the single-phase AC generator is not supplied to the LED lamp (LED element A).
　すなわち、単相交流発電機で発電された電力の負の成分がＬＥＤランプに供給される。 That is, the negative component of the electric power generated by the single-phase AC generator is supplied to the LED lamp.
　さらに、本実施例に係るＬＥＤランプ点灯制御回路では、第１のスイッチ素子（第１のサイリスタ）により電流が制限される。 Furthermore, in the LED lamp lighting control circuit according to the present embodiment, the current is limited by the first switch element (first thyristor).
　このため、従来技術において課題となっていた、負荷などから負サージが発生した場合、または、バッテリの逆接時の逆電圧が印加される場合などにおいても、本発明に係るＬＥＤランプ点灯制御回路では、ＬＥＤ素子を保護するための追加のダイオードが、不要になる。 For this reason, the LED lamp lighting control circuit according to the present invention also has a problem in the prior art, such as when a negative surge occurs from a load or when a reverse voltage is applied when the battery is reversely connected. An additional diode for protecting the LED element is not necessary.
　さらに、従来技術では、例えば、バッテリＢの出力電流を制限してＬＥＤを点灯させる場合、ＬＥＤの直列接続数が増加してＬＥＤの順方向降下電圧ＶＦの合計が１２Ｖ以上になると、ＬＥＤ素子を点灯させることができない。例えば、白色ＬＥＤの順方向降下電圧ＶＦは、１個あたり３～４Ｖあるので、４個以上の直列接続では点灯できない。 Further, in the prior art, for example, when the LED is turned on by limiting the output current of the battery B, when the total number of LEDs connected in series increases and the total forward drop voltage VF of the LED becomes 12 V or more, the LED element is Cannot be lit. For example, since the forward voltage drop VF of the white LED is 3 to 4 V per one, it cannot be lit with four or more connected in series.
　一方、本実施例に係るＬＥＤランプ点灯制御回路では、単相交流発電機の負側の電圧を全てＬＥＤ点灯に使用する。 On the other hand, in the LED lamp lighting control circuit according to the present embodiment, all of the negative side voltage of the single-phase AC generator is used for LED lighting.
　そして、単相交流発電機は、通常、バッテリを充電するためにピーク電圧はバッテリ電圧以上になるよう設計される。アイドリングなど単相交流発電機の回転数の低い時でも、充電量が確保できるように、例えば、１０００ｒｐｍで２０Ｖ、１５００ｒｐｍで３０Ｖ程度の電圧を発生させる。この電圧を使ってＬＥＤ素子を点灯させることができるので４個以上の直列接続されたＬＥＤ素子でも点灯させることができる。 And, the single-phase AC generator is usually designed so that the peak voltage is higher than the battery voltage in order to charge the battery. For example, a voltage of about 20 V at 1000 rpm and about 30 V at 1500 rpm is generated so that the amount of charge can be secured even when the rotational speed of the single-phase AC generator is low, such as idling. Since the LED element can be lit using this voltage, even four or more LED elements connected in series can be lit.
　したがって、本実施例に係るＬＥＤランプ点灯制御回路は、ランプにＬＥＤランプを適用して消費電力を低減することにより、単相交流発電機の負荷の低減を図りつつ、バッテリを搭載しない車両にも適用可能にすることができる。 Therefore, the LED lamp lighting control circuit according to the present embodiment reduces the power consumption by applying the LED lamp to the lamp, thereby reducing the load on the single-phase AC generator and also for the vehicle not equipped with a battery. Can be made applicable.
　本実施例２においては、ＬＥＤランプ点灯制御回路の第１の制御回路の構成を具体的にした構成の一例について説明する。 In the second embodiment, an example of a specific configuration of the first control circuit of the LED lamp lighting control circuit will be described.
　ここで、図２は、本発明の一態様である実施例２に係るＬＥＤランプ点灯制御システム２０００の構成の一例を示す図である。なお、図２において、図１の符号と同じ符号は、実施例１と同様の構成を示す。 Here, FIG. 2 is a diagram illustrating an example of the configuration of the LED lamp lighting control system 2000 according to the second embodiment which is an aspect of the present invention. 2, the same reference numerals as those in FIG. 1 indicate the same configurations as those in the first embodiment.
　図２に示すように、ＬＥＤランプ点灯制御システム２０００は、バッテリＢと、単相交流発電機Ｇと、ＬＥＤランプ点灯制御回路２００と、複数のＬＥＤ素子Ａと、制限抵抗ＲＸと、を備える。 As shown in FIG. 2, the LED lamp lighting control system 2000 includes a battery B, a single-phase AC generator G, an LED lamp lighting control circuit 200, a plurality of LED elements A, and a limiting resistor RX.
　なお、図２に示すＬＥＤランプ点灯制御システム２０００の構成は、ＬＥＤランプ点灯制御回路２００以外は、図１に示すＬＥＤランプ点灯制御システム１０００と同様である。 The configuration of the LED lamp lighting control system 2000 shown in FIG. 2 is the same as the LED lamp lighting control system 1000 shown in FIG.
　ここで、ＬＥＤランプ点灯制御回路２００は、例えば、図２に示すように、第１の入力端子ＴＩＮ１と、第２の入力端子ＴＩＮ２と、出力端子ＴＯＵＴと、接地端子ＴＧと、第１のスイッチ素子（第１のサイリスタ）Ｓ１と、第２のスイッチ素子（第２のサイリスタ）Ｓ２と、第１の制御回路ＣＯＮ１と、第２の制御回路ＣＯＮ２と、を備える。 Here, for example, as shown in FIG. 2, the LED lamp lighting control circuit 200 includes a first input terminal TIN1, a second input terminal TIN2, an output terminal TOUT, a ground terminal TG, and a first switch. An element (first thyristor) S1, a second switch element (second thyristor) S2, a first control circuit CON1, and a second control circuit CON2 are provided.
　なお、図２に示すＬＥＤランプ点灯制御回路２００の構成は、第１の制御回路ＣＯＮ１の構成を具体的に記載している点以外は、図１に示すＬＥＤランプ点灯制御回路１００と同様である。 The configuration of the LED lamp lighting control circuit 200 shown in FIG. 2 is the same as that of the LED lamp lighting control circuit 100 shown in FIG. 1 except that the configuration of the first control circuit CON1 is specifically described. .
　図２に示すように、第１の制御回路ＣＯＮ１は、第１の分圧抵抗ＤＲ１と、第２の分圧抵抗ＤＲ２と、ダイオードＤと、平均化コンデンサＣａと、平均化抵抗Ｒａと、発振回路ＯＳＣと、コンパレータＣＯＭＰと、抵抗ＲＹと、を有する。 As shown in FIG. 2, the first control circuit CON1 includes a first voltage dividing resistor DR1, a second voltage dividing resistor DR2, a diode D, an averaging capacitor Ca, an averaging resistor Ra, and an oscillation. A circuit OSC, a comparator COMP, and a resistor RY are included.
　第１の分圧抵抗ＤＲ１は、第２の入力端子ＴＩＮ２に一端が接続されている。 The first voltage dividing resistor DR1 has one end connected to the second input terminal TIN2.
　第２の分圧抵抗ＤＲ２は、第１の分圧抵抗ＤＲ１の他端に一端が接続され、接地端子ＴＧに他端が接続されている。 The second voltage dividing resistor DR2 has one end connected to the other end of the first voltage dividing resistor DR1 and the other end connected to the ground terminal TG.
　ダイオードＤは、第１の分圧抵抗ＤＲ１の他端にアノードが接続されている。 The anode of the diode D is connected to the other end of the first voltage dividing resistor DR1.
　平均化コンデンサＣａは、ダイオードＤのカソードと接地端子ＴＧとの間に接続されている。 The averaging capacitor Ca is connected between the cathode of the diode D and the ground terminal TG.
　発振回路ＯＳＣは、ノコギリ波または三角波である発振信号を生成し出力するようになっている。 The oscillation circuit OSC generates and outputs an oscillation signal that is a sawtooth wave or a triangular wave.
　平均化抵抗Ｒａは、ダイオードのカソードに一端が接続されている。 The averaging resistor Ra has one end connected to the cathode of the diode.
　抵抗ＲＹは、コンパレータＣＯＭＰの出力とサイリスタＳ１のゲートとの間に接続されている。 The resistor RY is connected between the output of the comparator COMP and the gate of the thyristor S1.
　コンパレータＣＯＭＰは、抵抗ＲＹを介して、第１のサイリスタＳ１のゲートに信号を出力することにより、第１のサイリスタＳ１の動作を制御するようになっている。 The comparator COMP controls the operation of the first thyristor S1 by outputting a signal to the gate of the first thyristor S1 via the resistor RY.
　このコンパレータＣＯＭＰは、発振信号と平均化抵抗Ｒａの他端の比較電圧とが入力され、発振信号と比較電圧とを比較した結果に基づいて、第１のサイリスタＳ１を制御するようになっている。 The comparator COMP receives the oscillation signal and the comparison voltage at the other end of the averaging resistor Ra, and controls the first thyristor S1 based on the result of comparing the oscillation signal with the comparison voltage. .
　例えば、コンパレータＣＯＭＰは、出力電圧が第１極性（負の極性）の場合において、比較電圧の大きさが発振信号の大きさ未満のときは、第１のサイリスタＳ１をオフするようになっている。 For example, the comparator COMP is configured to turn off the first thyristor S1 when the output voltage is the first polarity (negative polarity) and the magnitude of the comparison voltage is less than the magnitude of the oscillation signal. .
　また、コンパレータＣＯＭＰは、出力電圧が第１極性（負の極性）の場合において、比較電圧の大きさが発振信号の大きさ以上のときは、第１のサイリスタＳ１をオンするようになっている。 The comparator COMP turns on the first thyristor S1 when the output voltage is the first polarity (negative polarity) and the magnitude of the comparison voltage is greater than or equal to the magnitude of the oscillation signal. .
　一方、コンパレータＣＯＭＰは、出力電圧が第２の極性（正の極性）の場合において、第１のサイリスタＳ１をオフするようになっている。 On the other hand, the comparator COMP is configured to turn off the first thyristor S1 when the output voltage is the second polarity (positive polarity).
　次に、以上のような構成を有するＬＥＤランプ点灯制御システム２０００におけるＬＥＤランプ点灯制御回路２００によるＬＥＤランプ点灯制御方法の一例について、説明する。 Next, an example of the LED lamp lighting control method by the LED lamp lighting control circuit 200 in the LED lamp lighting control system 2000 having the above configuration will be described.
　例えば、ＬＥＤランプ点灯制御回路２００（コンパレータＣＯＭＰ）は、出力電圧が第１極性（負の極性）の場合において、比較電圧の大きさが発振信号の大きさ未満のときは、第１のサイリスタＳ１をオフする。 For example, when the output voltage is the first polarity (negative polarity) and the magnitude of the comparison voltage is less than the magnitude of the oscillation signal, the LED lamp lighting control circuit 200 (comparator COMP) has the first thyristor S1. Turn off.
　これにより、単相交流発電機Ａの出力電圧の負側の成分は、この負側の成分が所定の大きさ（目標電圧）未満のときに、複数のＬＥＤ素子Ａに供給されない。 Thus, the negative component of the output voltage of the single-phase AC generator A is not supplied to the plurality of LED elements A when the negative component is less than a predetermined magnitude (target voltage).
　また、ＬＥＤランプ点灯制御回路２００（コンパレータＣＯＭＰ）は、出力電圧が第１極性（負の極性）の場合において、比較電圧の大きさが発振信号の大きさ以上のときは、第１のサイリスタＳ１をオンする。 Further, the LED lamp lighting control circuit 200 (comparator COMP) has a first thyristor S1 when the output voltage is the first polarity (negative polarity) and the comparison voltage is larger than the oscillation signal. Turn on.
　これにより、単相交流発電機Ａの出力電圧の負側の成分は、この負側の成分が所定の大きさ（目標電圧）以上になると、複数のＬＥＤ素子Ａに供給される。 Thus, the negative side component of the output voltage of the single-phase AC generator A is supplied to the plurality of LED elements A when the negative side component becomes a predetermined magnitude (target voltage) or more.
　一方、ＬＥＤランプ点灯制御回路２００（コンパレータＣＯＭＰ）は、出力電圧が第２の極性（正の極性）の場合において、第１のサイリスタＳ１をオフするようになっている。 On the other hand, the LED lamp lighting control circuit 200 (comparator COMP) turns off the first thyristor S1 when the output voltage has the second polarity (positive polarity).
　これにより、単相交流発電機Ａの出力電圧の正側の成分が複数のＬＥＤ素子Ａに供給されない。 Thereby, the positive component of the output voltage of the single-phase AC generator A is not supplied to the plurality of LED elements A.
　なお、ＬＥＤランプ点灯制御回路２００のその他の動作は、実施例１に示すＬＥＤランプ点灯制御回路１００の動作と同様である。 The other operations of the LED lamp lighting control circuit 200 are the same as the operations of the LED lamp lighting control circuit 100 shown in the first embodiment.
　以上のように、本実施例に係るＬＥＤランプ点灯制御回路は、実施例１と同様に、第１の入力端子に一端が接続され、第２の入力端子に他端が接続された第１のスイッチ素子（第１のサイリスタ）と、第１のスイッチ素子を制御する第１の制御回路と、出力端子に一端が接続され、第１の入力端子に他端が接続された第２のスイッチ素子（第２のサイリスタ）と、第２のスイッチ素子を制御する第２の制御回路と、を備える。 As described above, the LED lamp lighting control circuit according to the present embodiment is similar to the first embodiment in that the first input terminal is connected to the first input terminal and the other end is connected to the second input terminal. A switch element (first thyristor), a first control circuit for controlling the first switch element, and a second switch element having one end connected to the output terminal and the other end connected to the first input terminal (Second thyristor) and a second control circuit for controlling the second switch element.
　第１の制御回路は、実施例１と同様に、単相交流発電機から出力された第１の入力端子の出力電圧が第１極性（負の極性）の場合において、第１のスイッチ素子をオンする。一方、第１の制御回路は、実施例１と同様に、出力電圧が第２極性（正の極性）の場合において、第１のスイッチ素子をオフする。 As in the first embodiment, the first control circuit sets the first switch element when the output voltage of the first input terminal output from the single-phase AC generator is the first polarity (negative polarity). Turn on. On the other hand, as in the first embodiment, the first control circuit turns off the first switch element when the output voltage has the second polarity (positive polarity).
　これにより、単相交流発電機から出力された第１の入力端子の第１極性（負の極性）の出力電圧がＬＥＤランプに供給される。一方、単相交流発電機から出力された第１の入力端子の第２極性（正の極性）の出力電圧はＬＥＤランプ（ＬＥＤ素子Ａ）に供給されない。 Thereby, the output voltage of the first polarity (negative polarity) of the first input terminal output from the single-phase AC generator is supplied to the LED lamp. On the other hand, the output voltage of the second polarity (positive polarity) of the first input terminal output from the single-phase AC generator is not supplied to the LED lamp (LED element A).
　すなわち、単相交流発電機で発電された電力の負の成分がＬＥＤランプに供給される。 That is, the negative component of the electric power generated by the single-phase AC generator is supplied to the LED lamp.
　さらに、本実施例に係るＬＥＤランプ点灯制御回路では、第１のスイッチ素子（第１のサイリスタ）により電流が制限される。 Furthermore, in the LED lamp lighting control circuit according to the present embodiment, the current is limited by the first switch element (first thyristor).
　このため、従来技術において課題となっていた、負荷などから負サージが発生した場合、または、バッテリＢの逆接時の逆電圧が印加される場合などにおいても、本発明に係るＬＥＤランプ点灯制御回路では、ＬＥＤ素子を保護するための追加のダイオードが、不要になる。 For this reason, the LED lamp lighting control circuit according to the present invention has been a problem in the prior art even when a negative surge occurs from a load or the like, or when a reverse voltage at the time of reverse connection of the battery B is applied. Then, an additional diode for protecting the LED element is not necessary.
　さらに、既述のように、従来技術では、例えば、バッテリＢの出力電流を制限してＬＥＤを点灯させる場合、ＬＥＤの直列接続数が増加してＬＥＤの順方向降下電圧ＶＦの合計が１２Ｖ以上になると、ＬＥＤ素子を点灯させることができない。例えば、白色ＬＥＤの順方向降下電圧ＶＦは、１個あたり３～４Ｖあるので、４個以上の直列接続では点灯できない。 Further, as described above, in the conventional technique, for example, when the LED B is turned on by limiting the output current of the battery B, the number of LEDs connected in series increases and the total forward drop voltage VF of the LED is 12 V or more. Then, the LED element cannot be turned on. For example, since the forward voltage drop VF of the white LED is 3 to 4 V per one, it cannot be lit with four or more connected in series.
　一方、本実施例に係るＬＥＤランプ点灯制御回路では、単相交流発電機の負側の電圧を全てＬＥＤ点灯に使用する。 On the other hand, in the LED lamp lighting control circuit according to the present embodiment, all of the negative side voltage of the single-phase AC generator is used for LED lighting.
　そして、単相交流発電機は、通常、バッテリを充電するためにピーク電圧はバッテリ電圧以上になるよう設計される。アイドリングなど単相交流発電機の回転数の低い時でも、充電量が確保できるように、例えば、１０００ｒｐｍで２０Ｖ、１５００ｒｐｍで３０Ｖ程度の電圧を発生させる。この電圧を使ってＬＥＤ素子を点灯させることができるので４個以上の直列接続されたＬＥＤ素子でも点灯させることができる。 And, the single-phase AC generator is usually designed so that the peak voltage is higher than the battery voltage in order to charge the battery. For example, a voltage of about 20 V at 1000 rpm and about 30 V at 1500 rpm is generated so that the amount of charge can be secured even when the rotational speed of the single-phase AC generator is low, such as idling. Since the LED element can be lit using this voltage, even four or more LED elements connected in series can be lit.
　したがって、本実施例に係るＬＥＤランプ点灯制御回路は、実施例１と同様に、ランプにＬＥＤランプを適用して消費電力を低減することにより、単相交流発電機の負荷の低減を図りつつ、バッテリを搭載しない車両にも適用可能にすることができる。 Therefore, the LED lamp lighting control circuit according to the present embodiment, like the first embodiment, reduces the power consumption by applying the LED lamp to the lamp, thereby reducing the load of the single-phase AC generator, It can be applied to a vehicle not equipped with a battery.
　本実施例３においては、ＬＥＤランプ点灯制御回路の第１の制御回路の構成を具体的にした構成の他の例について説明する。 In the third embodiment, another example of a specific configuration of the first control circuit of the LED lamp lighting control circuit will be described.
　ここで、図３は、本発明の一態様である実施例３に係るＬＥＤランプ点灯制御システム３０００の構成の一例を示す図である。なお、図３において、図１の符号と同じ符号は、実施例１と同様の構成を示す。 Here, FIG. 3 is a diagram illustrating an example of the configuration of the LED lamp lighting control system 3000 according to the third embodiment which is an aspect of the present invention. 3, the same reference numerals as those in FIG. 1 indicate the same configurations as those in the first embodiment.
　図３に示すように、ＬＥＤランプ点灯制御システム３０００は、バッテリＢと、単相交流発電機Ｇと、ＬＥＤランプ点灯制御回路３００と、複数のＬＥＤ素子Ａと、制限抵抗ＲＸと、を備える。 As shown in FIG. 3, the LED lamp lighting control system 3000 includes a battery B, a single-phase AC generator G, an LED lamp lighting control circuit 300, a plurality of LED elements A, and a limiting resistor RX.
　なお、図３に示すＬＥＤランプ点灯制御システム３０００の構成は、ＬＥＤランプ点灯制御回路３００以外は、図１に示すＬＥＤランプ点灯制御システム１０００と同様である。 The configuration of the LED lamp lighting control system 3000 shown in FIG. 3 is the same as that of the LED lamp lighting control system 1000 shown in FIG.
　ここで、ＬＥＤランプ点灯制御回路３００は、例えば、図３に示すように、第１の入力端子ＴＩＮ１と、第２の入力端子ＴＩＮ２と、出力端子ＴＯＵＴと、接地端子ＴＧと、第１のスイッチ素子（第１のサイリスタ）Ｓ１と、第２のスイッチ素子（第２のサイリスタ）Ｓ２と、第１の制御回路ＣＯＮ１と、第２の制御回路ＣＯＮ２と、を備える。 Here, for example, as shown in FIG. 3, the LED lamp lighting control circuit 300 includes a first input terminal TIN1, a second input terminal TIN2, an output terminal TOUT, a ground terminal TG, and a first switch. An element (first thyristor) S1, a second switch element (second thyristor) S2, a first control circuit CON1, and a second control circuit CON2 are provided.
　なお、図３に示すＬＥＤランプ点灯制御回路３００の構成は、第１の制御回路ＣＯＮ１の構成を具体的に記載している点以外は、図１に示すＬＥＤランプ点灯制御回路１００と同様である。 The configuration of the LED lamp lighting control circuit 300 shown in FIG. 3 is the same as that of the LED lamp lighting control circuit 100 shown in FIG. 1 except that the configuration of the first control circuit CON1 is specifically described. .
　図３に示すように、第１の制御回路ＣＯＮ１は、第１のダイオードＤ１と、第２のダイオードＤ２と、第３のダイオードＤ３と、第１の抵抗Ｒ１と、第２の抵抗Ｒ２と、第３の抵抗Ｒ３と、第４の抵抗Ｒ４と、第５の抵抗Ｒ５と、第６の抵抗Ｒ６と、第１のコンデンサＣ１と、第２のコンデンサＣ２と、ショットキーバリアダイオードＤＸと、第１のＰＮＰ型バイポーラトランジスタＴｒ１と、第２のＰＮＰ型バイポーラトランジスタＴｒ２と、を有する。 As shown in FIG. 3, the first control circuit CON1 includes a first diode D1, a second diode D2, a third diode D3, a first resistor R1, a second resistor R2, The third resistor R3, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6, the first capacitor C1, the second capacitor C2, the Schottky barrier diode DX, 1 PNP-type bipolar transistor Tr1 and second PNP-type bipolar transistor Tr2.
　第１の抵抗Ｒ１は、第２の入力端子ＴＩＮ２に一端が接続されている。 The first resistor R1 has one end connected to the second input terminal TIN2.
　第１のダイオードＤ１は、第１の抵抗Ｒ１の他端にカソードが接続されている。 The cathode of the first diode D1 is connected to the other end of the first resistor R1.
　第２の抵抗Ｒ２は、第１のダイオードＤ１のアノードに一端が接続され、接地端子ＴＧに他端が接続されている。 The second resistor R2 has one end connected to the anode of the first diode D1 and the other end connected to the ground terminal TG.
　第１のコンデンサＣ１は、第１のダイオードＤ１のアノードと接地端子ＴＧとの間で、第２の抵抗Ｒ２と並列に接続されている。 The first capacitor C1 is connected in parallel with the second resistor R2 between the anode of the first diode D1 and the ground terminal TG.
　第３の抵抗Ｒ３は、第１のダイオードＤ１のアノードに一端が接続されている。 The third resistor R3 has one end connected to the anode of the first diode D1.
　ショットキーバリアダイオードＤＸは、第３の抵抗Ｒ３の他端にアノードが接続されている。例えば、このショットキーバリアダイオードＤＸの降伏電圧を調整することにより、ＬＥＤ素子Ａを発光させる出力電圧の目標電圧を調整することができる。 The anode of the Schottky barrier diode DX is connected to the other end of the third resistor R3. For example, the target voltage of the output voltage that causes the LED element A to emit light can be adjusted by adjusting the breakdown voltage of the Schottky barrier diode DX.
　第４の抵抗Ｒ４は、ショットキーバリアダイオードＤＸのカソードに一端が接続され、接地端子ＴＧに他端が接続されている。 The fourth resistor R4 has one end connected to the cathode of the Schottky barrier diode DX and the other end connected to the ground terminal TG.
　第２のダイオードＤ２は、第１の入力端子ＴＩＮ１にカソードが接続されている。 The cathode of the second diode D2 is connected to the first input terminal TIN1.
　第５の抵抗Ｒ５は、第２のダイオードＤ２のアノードに一端が接続されている。 The fifth resistor R5 has one end connected to the anode of the second diode D2.
　第１のＰＮＰ型バイポーラトランジスタＴｒ１は、第５の抵抗Ｒ５の他端にコレクタが接続され、接地端子ＴＧにエミッタが接続され、ショットキーバリアダイオードＤＸのカソードにベースが接続されている。 The first PNP bipolar transistor Tr1 has a collector connected to the other end of the fifth resistor R5, an emitter connected to the ground terminal TG, and a base connected to the cathode of the Schottky barrier diode DX.
　第６の抵抗Ｒ６は、第１のサイリスタＳ１のゲートに一端が接続されている。 The sixth resistor R6 has one end connected to the gate of the first thyristor S1.
　第３のダイオードＤ３は、第６の抵抗Ｒ６の他端にカソードが接続されている。 The third diode D3 has a cathode connected to the other end of the sixth resistor R6.
　第２のＰＮＰ型バイポーラトランジスタＴｒ２は、第３のダイオードＤ３のアノードにコレクタが接続され、接地端子ＴＧにエミッタが接続され、第１のＰＮＰ型バイポーラトランジスタＴｒ１のコレクタにベースが接続されている。 The second PNP bipolar transistor Tr2 has a collector connected to the anode of the third diode D3, an emitter connected to the ground terminal TG, and a base connected to the collector of the first PNP bipolar transistor Tr1.
　第２のコンデンサＣ２は、第２の入力端子ＴＩＮ２に一端が接続され、接地端子ＴＧに他端が接続されている。 The second capacitor C2 has one end connected to the second input terminal TIN2 and the other end connected to the ground terminal TG.
　この第２のコンデンサＣ２は、ＬＥＤ素子Ａを発光させるための電力を蓄積するようになっている。したがって、第２のコンデンサＣ２の容量値は、第１のコンデンサＣ１の容量値よりも大きくなるように設定されている。 The second capacitor C2 stores electric power for causing the LED element A to emit light. Therefore, the capacitance value of the second capacitor C2 is set to be larger than the capacitance value of the first capacitor C1.
　また、既述のように、第２の入力端子ＴＩＮ２と接地との間で、電流を制限する制限抵抗ＲＸが、ＬＥＤ素子Ａと直列に、接続されている。 Further, as described above, the limiting resistor RX for limiting the current is connected in series with the LED element A between the second input terminal TIN2 and the ground.
　次に、以上のような構成を有するＬＥＤランプ点灯制御システム３０００におけるＬＥＤランプ点灯制御回路３００によるＬＥＤランプ点灯制御方法の一例について、説明する。 Next, an example of the LED lamp lighting control method by the LED lamp lighting control circuit 300 in the LED lamp lighting control system 3000 having the above configuration will be described.
　先ず、例えば、出力電圧が第１極性（負の極性）の場合において、第１のコンデンサＣ１の充電電圧が低いとき、ショットキーバリアダイオードＤＸがオフし、第１のＰＮＰ型バイポーラトランジスタＴｒ１がオフし、第２のＰＮＰ型バイポーラトランジスタＴｒ２がオンする。 First, for example, when the output voltage is the first polarity (negative polarity), when the charging voltage of the first capacitor C1 is low, the Schottky barrier diode DX is turned off and the first PNP-type bipolar transistor Tr1 is turned off. Then, the second PNP bipolar transistor Tr2 is turned on.
　これにより、第１のサイリスタＳ１がオンし、ＬＥＤ素子Ａは、第１極性（負の極性）の電流が流れて発光するとともに、第２のコンデンサＣ２が充電される。　
　すなわち、ＬＥＤランプ点灯制御回路３００は、出力電圧が第１極性（負の極性）の場合において、第１のサイリスタＳ１をオンする。 As a result, the first thyristor S1 is turned on, and the LED element A emits light when a first polarity (negative polarity) current flows, and the second capacitor C2 is charged.
That is, the LED lamp lighting control circuit 300 turns on the first thyristor S1 when the output voltage is the first polarity (negative polarity).
　そして、出力電圧が第１極性（負の極性）の場合において、第１のコンデンサＣ１の充電電圧が高くなると、ショットキーバリアダイオードＤＸがオンし、第１のＰＮＰ型バイポーラトランジスタＴｒ１がオンし、第２のＰＮＰ型バイポーラトランジスタＴｒ２がオフする。 When the output voltage is the first polarity (negative polarity), when the charging voltage of the first capacitor C1 is increased, the Schottky barrier diode DX is turned on, the first PNP bipolar transistor Tr1 is turned on, The second PNP bipolar transistor Tr2 is turned off.
　これにより、第１のサイリスタＳ１がオフする。このとき、ＬＥＤ素子Ａは、第２のコンデンサＣ２に蓄積された電力により発光する。 Thereby, the first thyristor S1 is turned off. At this time, the LED element A emits light by the electric power stored in the second capacitor C2.
　したがって、本実施例３においては、出力電圧が第１極性（負の極性）の場合において、第１のサイリスタＳ１がオフに制御され得る。 Therefore, in the third embodiment, when the output voltage is the first polarity (negative polarity), the first thyristor S1 can be controlled to be turned off.
　一方、例えば、出力電圧が第２極性（正の極性）の場合において、第２のＰＮＰ型バイポーラトランジスタＴｒ２がオフする。 On the other hand, for example, when the output voltage has the second polarity (positive polarity), the second PNP-type bipolar transistor Tr2 is turned off.
　これにより、第１のサイリスタＳ１がオフする。このとき、ＬＥＤ素子Ａは、第２のコンデンサＣ２に蓄積された電力により発光する。 Thereby, the first thyristor S1 is turned off. At this time, the LED element A emits light by the electric power stored in the second capacitor C2.
　すなわち、ＬＥＤランプ点灯制御回路３００は、出力電圧が第２の極性（正の極性）の場合において、第１のサイリスタＳ１をオフするようになっている。 That is, the LED lamp lighting control circuit 300 is configured to turn off the first thyristor S1 when the output voltage has the second polarity (positive polarity).
　これにより、単相交流発電機Ａの出力電圧の正側の成分が複数のＬＥＤ素子Ａに供給されない。 Thereby, the positive component of the output voltage of the single-phase AC generator A is not supplied to the plurality of LED elements A.
　なお、ＬＥＤランプ点灯制御回路３００のその他の動作は、実施例１に示すＬＥＤランプ点灯制御回路１００の動作と同様である。 The other operations of the LED lamp lighting control circuit 300 are the same as the operations of the LED lamp lighting control circuit 100 shown in the first embodiment.
　以上のように、本実施例に係るＬＥＤランプ点灯制御回路は、実施例１と同様に、第１の入力端子に一端が接続され、第２の入力端子に他端が接続された第１のスイッチ素子（第１のサイリスタ）と、第１のスイッチ素子を制御する第１の制御回路と、出力端子に一端が接続され、第１の入力端子に他端が接続された第２のスイッチ素子（第２のサイリスタ）と、第２のスイッチ素子を制御する第２の制御回路と、を備える。 As described above, the LED lamp lighting control circuit according to the present embodiment is similar to the first embodiment in that the first input terminal is connected to the first input terminal and the other end is connected to the second input terminal. A switch element (first thyristor), a first control circuit for controlling the first switch element, and a second switch element having one end connected to the output terminal and the other end connected to the first input terminal (Second thyristor) and a second control circuit for controlling the second switch element.
　第１の制御回路は、実施例１と同様に、単相交流発電機から出力された第１の入力端子の出力電圧が第１極性（負の極性）の場合において、第１のスイッチ素子をオンする。一方、第１の制御回路は、実施例１と同様に、出力電圧が第２極性（正の極性）の場合において、第１のスイッチ素子をオフする。 As in the first embodiment, the first control circuit sets the first switch element when the output voltage of the first input terminal output from the single-phase AC generator is the first polarity (negative polarity). Turn on. On the other hand, as in the first embodiment, the first control circuit turns off the first switch element when the output voltage has the second polarity (positive polarity).
　これにより、単相交流発電機から出力された第１の入力端子の第１極性（負の極性）の出力電圧がＬＥＤランプに供給される。一方、単相交流発電機から出力された第１の入力端子の第２極性（正の極性）の出力電圧はＬＥＤランプ（ＬＥＤ素子Ａ）に供給されない。 Thereby, the output voltage of the first polarity (negative polarity) of the first input terminal output from the single-phase AC generator is supplied to the LED lamp. On the other hand, the output voltage of the second polarity (positive polarity) of the first input terminal output from the single-phase AC generator is not supplied to the LED lamp (LED element A).
　すなわち、単相交流発電機で発電された電力の負の成分がＬＥＤランプに供給される。 That is, the negative component of the electric power generated by the single-phase AC generator is supplied to the LED lamp.
　さらに、本実施例に係るＬＥＤランプ点灯制御回路では、第１のスイッチ素子（第１のサイリスタ）により電流が制限される。 Furthermore, in the LED lamp lighting control circuit according to the present embodiment, the current is limited by the first switch element (first thyristor).
　このため、従来技術において課題となっていた、負荷などから負サージが発生した場合、または、バッテリＢの逆接時の逆電圧が印加される場合などにおいても、本発明に係るＬＥＤランプ点灯制御回路では、ＬＥＤ素子を保護するための追加のダイオードが、不要になる。 For this reason, the LED lamp lighting control circuit according to the present invention has been a problem in the prior art even when a negative surge occurs from a load or the like, or when a reverse voltage at the time of reverse connection of the battery B is applied. Then, an additional diode for protecting the LED element is not necessary.
　さらに、既述のように、従来技術では、例えば、バッテリＢの出力電流を制限してＬＥＤを点灯させる場合、ＬＥＤの直列接続数が増加してＬＥＤの順方向降下電圧ＶＦの合計が１２Ｖ以上になると、ＬＥＤ素子を点灯させることができない。例えば、白色ＬＥＤの順方向降下電圧ＶＦは、１個あたり３～４Ｖあるので、４個以上の直列接続では点灯できない。 Further, as described above, in the conventional technique, for example, when the LED B is turned on by limiting the output current of the battery B, the number of LEDs connected in series increases and the total forward drop voltage VF of the LED is 12 V or more. Then, the LED element cannot be turned on. For example, since the forward voltage drop VF of the white LED is 3 to 4 V per one, it cannot be lit with four or more connected in series.
　一方、本実施例に係るＬＥＤランプ点灯制御回路では、単相交流発電機の負側の電圧を全てＬＥＤ点灯に使用する。 On the other hand, in the LED lamp lighting control circuit according to the present embodiment, all of the negative side voltage of the single-phase AC generator is used for LED lighting.
　そして、単相交流発電機は、通常、バッテリを充電するためにピーク電圧はバッテリ電圧以上になるよう設計される。アイドリングなど単相交流発電機の回転数の低い時でも、充電量が確保できるように、例えば、１０００ｒｐｍで２０Ｖ、１５００ｒｐｍで３０Ｖ程度の電圧を発生させる。この電圧を使ってＬＥＤ素子を点灯させることができるので４個以上の直列接続されたＬＥＤ素子でも点灯させることができる。 And, the single-phase AC generator is usually designed so that the peak voltage is higher than the battery voltage in order to charge the battery. For example, a voltage of about 20 V at 1000 rpm and about 30 V at 1500 rpm is generated so that the amount of charge can be secured even when the rotational speed of the single-phase AC generator is low, such as idling. Since the LED element can be lit using this voltage, even four or more LED elements connected in series can be lit.
　したがって、本実施例に係るＬＥＤランプ点灯制御回路は、実施例１と同様に、ランプにＬＥＤランプを適用して消費電力を低減することにより、単相交流発電機の負荷の低減を図りつつ、バッテリを搭載しない車両にも適用可能にすることができる。 Therefore, the LED lamp lighting control circuit according to the present embodiment, like the first embodiment, reduces the power consumption by applying the LED lamp to the lamp, thereby reducing the load of the single-phase AC generator, It can be applied to a vehicle not equipped with a battery.
　なお、実施例は例示であり、発明の範囲はそれらに限定されない。 In addition, an Example is an illustration and the range of invention is not limited to them.
１００、１００Ａ、２００、３００　ＬＥＤランプ点灯制御回路
１０００、１０００Ａ、２０００、３０００　ＬＥＤランプ点灯制御システム
Ｂ　バッテリ
Ｇ　単相交流発電機
Ｌ　コイル
Ａ　ＬＥＤ素子
ＲＸ　制限抵抗
ＴＩＮ１　第１の入力端子
ＴＩＮ２　第２の入力端子
ＴＯＵＴ　出力端子
ＴＧ　接地端子
Ｓ１　第１のスイッチ素子（第１のサイリスタ）
Ｓ２　第２のスイッチ素子（第２のサイリスタ）
ＣＯＮ１　第１の制御回路
ＣＯＮ２　第２の制御回路
ＤＲ１　第１の分圧抵抗
ＤＲ２　第２の分圧抵抗
Ｄ　ダイオード
Ｃａ　平均化コンデンサ
Ｒａ　平均化抵抗
ＯＳＣ　発振回路
ＣＯＭＰ　コンパレータ
ＲＹ　抵抗
Ｄ１　第１のダイオード
Ｄ２　第２のダイオード
Ｄ３　第３のダイオード
Ｒ１　第１の抵抗
Ｒ２　第２の抵抗
Ｒ３　第３の抵抗
Ｒ４　第４の抵抗
Ｒ５　第５の抵抗
Ｒ６　第６の抵抗
Ｃ１　第１のコンデンサ
Ｃ２　第２のコンデンサ
ＤＸ　ショットキーバリアダイオード
Ｔｒ１　第１のＰＮＰ型バイポーラトランジスタ
Ｔｒ２　第２のＰＮＰ型バイポーラトランジスタ 100, 100A, 200, 300 LED lamp lighting control circuit 1000, 1000A, 2000, 3000 LED lamp lighting control system B Battery G Single-phase AC generator L Coil A LED element RX Limiting resistor TIN1 First input terminal TIN2 Second Input terminal TOUT Output terminal TG Ground terminal S1 First switch element (first thyristor)
S2 Second switch element (second thyristor)
CON1 first control circuit CON2 second control circuit DR1 first voltage dividing resistor DR2 second voltage dividing resistor D diode Ca averaging capacitor Ra averaging resistor OSC oscillation circuit COMP comparator RY resistor D1 first diode D2 first 2nd diode D3 3rd diode R1 1st resistance R2 2nd resistance R3 3rd resistance R4 4th resistance R5 5th resistance R6 6th resistance C1 1st capacitor C2 2nd capacitor DX Shot Key barrier diode Tr1 First PNP type bipolar transistor Tr2 Second PNP type bipolar transistor

Claims (15)

  1. 　一端が接地に接続された単相交流発電機のコイルの他端が、接続される第１の入力端子と、
    　アノード側が前記接地に接続されたＬＥＤ素子のカソード側が、接続される第２の入力端子と、
    　負荷が接続される出力端子と、
    　前記接地が接続される接地端子と、
    　前記第１の入力端子に一端が接続され、前記第２の入力端子に他端が接続された第１のスイッチ素子と、
    　前記第１のスイッチ素子を制御する第１の制御回路と、
    　前記出力端子に一端が接続され、前記第１の入力端子に他端が接続された第２のスイッチ素子と、
    　前記第２のスイッチ素子を制御する第２の制御回路と、を備え、
    　前記第１の制御回路は、
    　前記単相交流発電機から出力された前記第１の入力端子の出力電圧が第１極性の場合において、前記第１のスイッチ素子をオンし、
    　一方、前記出力電圧が第２極性の場合において、前記第１のスイッチ素子をオフすることを特徴とするＬＥＤランプ点灯制御回路。     A first input terminal to which the other end of the coil of the single-phase AC generator having one end connected to the ground is connected;
    A second input terminal to which the cathode side of the LED element whose anode side is connected to the ground is connected;
    An output terminal to which a load is connected;
    A ground terminal to which the ground is connected;
    A first switch element having one end connected to the first input terminal and the other end connected to the second input terminal;
    A first control circuit for controlling the first switch element;
    A second switch element having one end connected to the output terminal and the other end connected to the first input terminal;
    A second control circuit for controlling the second switch element,
    The first control circuit includes:
    When the output voltage of the first input terminal output from the single-phase AC generator has a first polarity, the first switch element is turned on,
    On the other hand, an LED lamp lighting control circuit that turns off the first switch element when the output voltage has the second polarity.
  2. 　前記第１極性は、負の極性であり、
    　前記第２極性は、正の極性であり、
    　前記第１のスイッチ素子は、前記第１の入力端子にカソードが接続され、前記第２の入力端子にアノードが接続された第１のサイリスタであり、
    　前記第２のスイッチ素子は、前記出力端子にカソードが接続され、前記第１の入力端子にアノードが接続された第２のサイリスタである
    　ことを特徴とする請求項１に記載のＬＥＤランプ点灯制御回路。     The first polarity is a negative polarity;
    The second polarity is a positive polarity;
    The first switch element is a first thyristor having a cathode connected to the first input terminal and an anode connected to the second input terminal;
    2. The LED lamp lighting control according to claim 1, wherein the second switch element is a second thyristor having a cathode connected to the output terminal and an anode connected to the first input terminal. circuit.
  3. 　前記第２の入力端子と前記接地との間で、電流を制限する制限抵抗が、前記ＬＥＤ素子と直列に、接続されている
    　ことを特徴とする請求項２に記載のＬＥＤランプ点灯制御回路。     The LED lamp lighting control circuit according to claim 2, wherein a limiting resistor for limiting a current is connected in series with the LED element between the second input terminal and the ground.
  4. 　前記第１の制御回路は、
    　前記単相交流発電機から出力された前記第１の入力端子の出力電圧が第１極性の場合において、前記出力電圧の大きさが目標電圧以上になると、前記第１のサイリスタをオンすることを特徴とする請求項２に記載のＬＥＤランプ点灯制御回路。     The first control circuit includes:
    In the case where the output voltage of the first input terminal output from the single-phase AC generator has the first polarity, the first thyristor is turned on when the magnitude of the output voltage exceeds a target voltage. The LED lamp lighting control circuit according to claim 2, wherein:
  5. 　前記第１の制御回路は、
    　前記第２の入力端子に一端が接続された第１の分圧抵抗と、
    　前記第１の分圧抵抗の他端に一端が接続され、前記接地端子に他端が接続された第２の分圧抵抗と、
    　前記第１の分圧抵抗の他端にアノードが接続されたダイオードと、
    　前記ダイオードのカソードと前記接地端子との間に接続された平均化コンデンサと、
    　ノコギリ波または三角波である発振信号を生成し出力する発振回路と、
    　前記ダイオードのカソードに一端が接続された平均化抵抗と、
    　前記発振信号と前記平均化抵抗の他端の比較電圧とが入力され、前記発振信号と前記比較電圧とを比較した結果に基づいて、前記第１のサイリスタを制御するコンパレータと、を有する
    　ことを特徴とする請求項４に記載のＬＥＤランプ点灯制御回路。     The first control circuit includes:
    A first voltage dividing resistor having one end connected to the second input terminal;
    A second voltage dividing resistor having one end connected to the other end of the first voltage dividing resistor and the other end connected to the ground terminal;
    A diode having an anode connected to the other end of the first voltage dividing resistor;
    An averaging capacitor connected between the cathode of the diode and the ground terminal;
    An oscillation circuit that generates and outputs an oscillation signal that is a sawtooth or triangular wave;
    An averaging resistor having one end connected to the cathode of the diode;
    A comparator for controlling the first thyristor based on a result of comparison between the oscillation signal and the comparison voltage, the oscillation signal and a comparison voltage at the other end of the averaging resistor being input. The LED lamp lighting control circuit according to claim 4, wherein
  6. 　前記コンパレータは、
    　前記出力電圧が負の極性の場合において、前記比較電圧の大きさが前記発振信号の大きさ未満のときは、前記第１のサイリスタをオフし、前記比較電圧の大きさが前記発振信号の大きさ以上のときは、前記第１のサイリスタをオンし、
    　一方、前記出力電圧が正の極性の場合において、前記第１のサイリスタをオフする
    　ことを特徴とする請求項５に記載のＬＥＤランプ点灯制御回路。     The comparator is
    When the output voltage has a negative polarity and the magnitude of the comparison voltage is less than the magnitude of the oscillation signal, the first thyristor is turned off, and the magnitude of the comparison voltage is the magnitude of the oscillation signal. If this is the case, turn on the first thyristor,
    On the other hand, the LED lamp lighting control circuit according to claim 5, wherein the first thyristor is turned off when the output voltage has a positive polarity.
  7. 　前記第１の制御回路は、前記コンパレータの出力と前記サイリスタのゲートとの間に接続された抵抗をさらに有する
    　ことを特徴とする請求項６に記載のＬＥＤランプ点灯制御回路。     The LED lamp lighting control circuit according to claim 6, wherein the first control circuit further includes a resistor connected between an output of the comparator and a gate of the thyristor.
  8. 　前記第１の制御回路は、
    　前記第２の入力端子に一端が接続された第１の抵抗と、
    　前記第１の抵抗の他端にカソードが接続された第１のダイオードと、
    　前記第１のダイオードのアノードに一端が接続され、前記接地端子に他端が接続された第２の抵抗と、
    　前記第１のダイオードのアノードと前記接地端子との間で、前記第２の抵抗と並列に接続された第１のコンデンサと、
    　前記第１のダイオードのアノードに一端が接続された第３の抵抗と、
    　前記第３の抵抗の他端にアノードが接続されたショットキーバリアダイオードと、
    　前記ショットキーバリアダイオードのカソードに一端が接続され、前記接地端子に他端が接続された第４の抵抗と、
    　前記第１の入力端子にカソードが接続された第２のダイオードと、
    　前記第２のダイオードのアノードに一端が接続された第５の抵抗と、
    　前記第５の抵抗の他端にコレクタが接続され、前記接地端子にエミッタが接続され、前記ショットキーバリアダイオードのカソードにベースが接続された第１のＰＮＰ型バイポーラトランジスタと、
    　前記第１のサイリスタのゲートに一端が接続された第６の抵抗と、前記第６の抵抗の他端にカソードが接続された第３のダイオードと、
    　前記第３のダイオードのアノードにコレクタが接続され、前記接地端子にエミッタが接続され、前記第１のＰＮＰ型バイポーラトランジスタのコレクタにベースが接続された第２のＰＮＰ型バイポーラトランジスタと、
    　前記第２の入力端子に一端が接続され、前記接地端子に他端が接続された第２のコンデンサと、を有する
    　ことを特徴とする請求項２に記載のＬＥＤランプ点灯制御回路。     The first control circuit includes:
    A first resistor having one end connected to the second input terminal;
    A first diode having a cathode connected to the other end of the first resistor;
    A second resistor having one end connected to the anode of the first diode and the other end connected to the ground terminal;
    A first capacitor connected in parallel with the second resistor between the anode of the first diode and the ground terminal;
    A third resistor having one end connected to the anode of the first diode;
    A Schottky barrier diode having an anode connected to the other end of the third resistor;
    A fourth resistor having one end connected to the cathode of the Schottky barrier diode and the other end connected to the ground terminal;
    A second diode having a cathode connected to the first input terminal;
    A fifth resistor having one end connected to the anode of the second diode;
    A first PNP-type bipolar transistor having a collector connected to the other end of the fifth resistor, an emitter connected to the ground terminal, and a base connected to the cathode of the Schottky barrier diode;
    A sixth resistor having one end connected to the gate of the first thyristor; a third diode having a cathode connected to the other end of the sixth resistor;
    A second PNP bipolar transistor having a collector connected to the anode of the third diode, an emitter connected to the ground terminal, and a base connected to the collector of the first PNP bipolar transistor;
    The LED lamp lighting control circuit according to claim 2, further comprising: a second capacitor having one end connected to the second input terminal and the other end connected to the ground terminal.
  9. 　前記第２の入力端子と前記接地との間で、電流を制限する制限抵抗が、前記ＬＥＤ素子と直列に、接続されている
    　ことを特徴とする請求項８に記載のＬＥＤランプ点灯制御回路。     The LED lamp lighting control circuit according to claim 8, wherein a limiting resistor for limiting a current is connected in series with the LED element between the second input terminal and the ground.
  10. 　前記第２のコンデンサの容量値は、前記第１のコンデンサの容量値よりも大きいことを特徴とする請求項８に記載のＬＥＤランプ点灯制御回路。 The LED lamp lighting control circuit according to claim 8, wherein a capacitance value of the second capacitor is larger than a capacitance value of the first capacitor.
  11. 　前記第２の制御回路は、前記第１の入力端子と前記接地端子との間の電圧、及び前記出力端子と前記接地端子との間の電圧に基づいて、前記第２のスイッチ素子を制御する
    　ことを特徴とする請求項２に記載のＬＥＤランプ点灯制御回路。     The second control circuit controls the second switch element based on a voltage between the first input terminal and the ground terminal and a voltage between the output terminal and the ground terminal. The LED lamp lighting control circuit according to claim 2.
  12. 　前記出力端子と前記接地端子との間にバッテリが接続されることを特徴とする請求項１０に記載のＬＥＤランプ点灯制御回路。 The LED lamp lighting control circuit according to claim 10, wherein a battery is connected between the output terminal and the ground terminal.
  13. 　前記第２の制御回路は、
    　前記出力電圧が正の極性の場合において、前記出力端子と前記接地との間に接続されたバッテリの充電電圧が規定電圧未満のときは、前記第２のサイリスタをオンし、一方、前記充電電圧が前記規定電圧以上のときは、前記第２のサイリスタをオフする
    　ことを特徴とする請求項１２に記載のＬＥＤランプ点灯制御回路。     The second control circuit includes:
    When the output voltage has a positive polarity and the charging voltage of the battery connected between the output terminal and the ground is less than a specified voltage, the second thyristor is turned on, while the charging voltage The LED lamp lighting control circuit according to claim 12, wherein when the voltage is equal to or higher than the specified voltage, the second thyristor is turned off.
  14. 　前記第２の入力端子と前記接地との間で、複数の前記ＬＥＤ素子が直列に接続されている
    　ことを特徴とする請求項２に記載のＬＥＤランプ点灯制御回路。     The LED lamp lighting control circuit according to claim 2, wherein the plurality of LED elements are connected in series between the second input terminal and the ground.
  15. 　一端が接地に接続された単相交流発電機のコイルの他端が、接続される第１の入力端子と、アノード側が前記接地に接続されたＬＥＤ素子のカソード側が、接続される第２の入力端子と、負荷が接続される出力端子と、前記接地が接続される接地端子と、前記第１の入力端子に一端が接続され、前記第２の入力端子に他端が接続された第１のスイッチ素子と、前記第１のスイッチ素子を制御する第１の制御回路と、前記出力端子に一端が接続され、前記第１の入力端子に他端が接続された第２のスイッチ素子と、前記第２のスイッチ素子を制御する第２の制御回路と、を備えたＬＥＤランプ点灯制御回路によるＬＥＤランプ点灯制御方法であって、
    　前記単相交流発電機から出力された前記第１の入力端子の出力電圧が第１極性の場合において、前記出力電圧の大きさが目標電圧以上になると、前記第１の制御回路により、前記第１のスイッチ素子をオンし、
    　一方、前記出力電圧が第２極性の場合において、前記第１の制御回路により、前記第１のスイッチ素子をオフする
    　ことを特徴とするＬＥＤランプ点灯制御方法。     A first input terminal to which the other end of the coil of the single-phase AC generator whose one end is connected to the ground is connected, and a second input to which the cathode side of the LED element whose anode side is connected to the ground is connected A first terminal having one end connected to the first input terminal and the other end connected to the second input terminal; an output terminal to which a load is connected; a ground terminal to which the ground is connected; A switch element; a first control circuit that controls the first switch element; a second switch element having one end connected to the output terminal and the other end connected to the first input terminal; A second control circuit for controlling the second switch element, and an LED lamp lighting control method by an LED lamp lighting control circuit comprising:
    In the case where the output voltage of the first input terminal output from the single-phase AC generator has the first polarity, and the magnitude of the output voltage is equal to or higher than a target voltage, the first control circuit causes the first control circuit to 1 switch element is turned on,
    On the other hand, when the output voltage has the second polarity, the first control circuit turns off the first switch element by the first control circuit.
PCT/JP2012/076928 2012-10-18 2012-10-18 Led lamp lighting control circuit and led lamp lighting control method WO2014061127A1 (en)

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BR112013021714A BR112013021714A2 (en) 2012-10-18 2012-10-18 led lamp lead control circuit and led lamp lead control method
PCT/JP2012/076928 WO2014061127A1 (en) 2012-10-18 2012-10-18 Led lamp lighting control circuit and led lamp lighting control method
CN201280004023.9A CN103890979B (en) 2012-10-18 2012-10-18 LED lighting control circuit and LED lighting control method thereof
TW102124510A TWI514921B (en) 2012-10-18 2013-07-09 LED lights lighting control circuit and LED lights lighting control method
IT000238A ITMO20130238A1 (en) 2012-10-18 2013-08-14 CONTROL CIRCUIT FOR IGNITION OF A LED LAMP AND METHOD OF CHECKING THE LIGHTING OF A LED LAMP

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