WO2016129104A1 - Ledランプ点灯回路、およびledランプ点灯回路の制御方法 - Google Patents
Ledランプ点灯回路、およびledランプ点灯回路の制御方法 Download PDFInfo
- Publication number
- WO2016129104A1 WO2016129104A1 PCT/JP2015/053980 JP2015053980W WO2016129104A1 WO 2016129104 A1 WO2016129104 A1 WO 2016129104A1 JP 2015053980 W JP2015053980 W JP 2015053980W WO 2016129104 A1 WO2016129104 A1 WO 2016129104A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- circuit
- indicator
- terminal
- led
- power supply
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- 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
-
- 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
- B60Q11/00—Arrangement of monitoring devices for devices provided for in groups B60Q1/00 - B60Q9/00
Definitions
- the present invention relates to an LED driver circuit and a method for controlling the LED driver circuit.
- LED (Light Emitting Diode) lamps can be driven at a low voltage and have longer life, lower power consumption, faster reaction speed, and higher impact resistance than filament lamps (bulb lamps). Therefore, the size and weight can be reduced.
- the LED lamp can be suitably used for, for example, a vehicle headlamp.
- LED lamp lighting circuit that receives a driving current from a lamp driving power source and lights a plurality of LED lamps (vehicle headlamps) connected in series by the driving current (for example, Japanese Patent Application Laid-Open No. 2012-2012). No. 160413).
- This conventional LED lamp lighting circuit includes, for example, an indicator device that controls the lighting of an indicator LED element in accordance with the lighting of an LED lamp that is a headlamp of a vehicle.
- the LED lamp lighting circuit described above controls the lighting of the indicator LED element by a mechanical switch (dimer switch) that operates in conjunction with the switch for switching the lighting of the LED lamp.
- Such a mechanical switch has a complicated structure and is expensive. Therefore, the conventional LED lamp lighting circuit is complicated and expensive.
- an object of the present invention is to provide an LED lamp lighting circuit that is simpler and can be configured at low cost.
- An LED driver circuit includes: Connected between a first power supply terminal and a second power supply terminal of the lamp drive power supply, receives a drive current supplied from the lamp drive power supply, and lights a plurality of LED lamps connected in series by the drive current.
- An LED lamp lighting circuit A first terminal connected to the first power supply terminal; a second terminal connected to the second power supply terminal; A first lamp circuit comprising one LED lamp or a plurality of LED lamps connected in series, one end of which is connected to the first terminal; A second lamp comprising one LED lamp or a plurality of LED lamps connected in series, one end connected to the other end of the first lamp circuit and the other end connected to the second terminal Circuit, Between the reference node connected to the other end of the first ramp circuit and the first contact connected to the first terminal, the state between the reference node and the second contact A switch circuit for switching between a conductive state and A control switch element having one end connected to the second contact and the other end connected to the second terminal; A switch control circuit for controlling the control switch element according to a first potential difference between one end and the other end of the control switch element; An indicator circuit that includes an indicator LED element and controls lighting of the indicator LED element according to a second potential difference between the reference node and the first terminal; The indicator circuit turns on the indicator LED element when the magnitude of the second potential difference
- the indicator circuit includes: A coil connected between the reference node and the first terminal; A relay connected between the indicator power supply and the ground, which is turned on when a current flowing through the coil is a specified value or more, and turned off when a current flowing through the coil is less than the specified value;
- the indicator LED element is: Between the indicator power supply and the ground, the relay is connected in series so that the cathode is connected to the ground side and the anode is connected to the indicator power supply side.
- the indicator circuit includes: A first resistor connected between the indicator power supply and the first node; A first resistor connected in series with the first resistor between the indicator power source and the first node such that a cathode is connected to the indicator power source side and an anode is connected to the first node side.
- the indicator LED element is: A cathode is connected to the first terminal, and an anode is connected to the other end of the second resistor.
- the indicator circuit includes: A first resistor having one end connected to the indicator power supply; An NPN bipolar transistor having a collector connected to the other end of the first resistor and an emitter connected to the first terminal; A second resistor connected between an emitter and a base of the NPN bipolar transistor; A third resistor connected between the base of the NPN bipolar transistor and the reference node; An indicator connected between the power supply for indicator and the ground, which is turned on when a current flowing through the NPN bipolar transistor is equal to or higher than a specified value, and turned off when a current flowing through the NPN bipolar transistor is less than the specified value.
- a switching element for The indicator LED element is: Between the indicator power source and the ground, the indicator switch element is connected in series so that the cathode is connected to the ground side and the anode is connected to the indicator power source side. And
- the indicator circuit includes: A first resistor having one end connected to the first node; An NPN bipolar transistor having a collector connected to the other end of the first resistor and an emitter connected to the first terminal; A second resistor connected between an emitter and a base of the NPN bipolar transistor; A third resistor connected between the base of the NPN bipolar transistor and the reference node;
- the indicator LED element is: A cathode is connected to the first node, and an anode is connected to the ground.
- the indicator circuit includes: A Zener diode connected in series with the indicator LED element is further provided between the first node and the ground so that an anode is connected to the first node side and a cathode is connected to the ground side. It is characterized by having.
- the switch control circuit includes: When the magnitude of the first potential difference between one end and the other end of the control switch element is equal to or higher than a preset reference voltage, the control switch element is turned on, When the magnitude of the first potential difference between one end and the other end of the control switch element is less than the reference voltage, the control switch element is turned off.
- the first power supply terminal is a power supply terminal on the low potential side of the lamp drive power supply
- the second power supply terminal is a power supply terminal on the high potential side of the lamp drive power supply.
- the lamp driving power source is It has a constant voltage control function and a constant current control function, When a current can be supplied to any of the LED lamps in the first lamp circuit and the second lamp circuit, a constant current is supplied to the LED lamp by the constant current control function, When no current can flow through any of the LED lamps in the first lamp circuit and the second lamp circuit, the constant voltage control function causes the first power supply terminal and the second power supply terminal to The output voltage output during the period is raised to a preset specified voltage to be a constant voltage.
- the control switch element is a thyristor having a cathode connected to the second contact and an anode connected to the second terminal.
- the switch control circuit includes: A first control resistor having one end connected to the second contact and the other end connected to the gate of the thyristor; and a second control resistor having one end connected to the other end of the first control resistor; A Zener diode having an anode connected to the other end of the second control resistor and a cathode connected to the second terminal.
- the control switch element is a thyristor having a cathode connected to the first terminal and an anode connected to the first contact.
- the switch control circuit includes: A first control resistor having one end connected to the first terminal and the other end connected to the gate of the thyristor; A second control resistor having one end connected to the other end of the first control resistor; And a Zener diode having an anode connected to the other end of the second control resistor and a cathode connected to the first contact.
- the switch circuit is A user can manually switch between a state of conducting between the reference node and the first contact and a state of conducting between the reference node and the second contact. It is characterized by that.
- An LED driver circuit control method includes: Connected between a first power supply terminal and a second power supply terminal of the lamp drive power supply, receives a drive current supplied from the lamp drive power supply, and lights a plurality of LED lamps connected in series by the drive current.
- An LED lamp lighting circuit a first terminal connected to the first power supply terminal, a second terminal connected to the second power supply terminal, and one LED lamp or connected in series It comprises a plurality of LED lamps, one end of which is connected to the first terminal and one LED lamp or a plurality of LED lamps connected in series, and one end of the first lamp circuit.
- a second ramp circuit connected to the other end of the ramp circuit, the other end connected to the second terminal; a reference node connected to the other end of the first ramp circuit; and the first terminal
- a switch circuit for switching between a conductive state and a state in which the reference node and the second contact are conductive, one end connected to the second contact and the other end connected to the second terminal
- a control switch element a switch control circuit for controlling the control switch element according to a first potential difference between one end and the other end of the control switch element, and an indicator LED element
- An indicator circuit that controls lighting of the LED element for indicator according to a second potential difference between a reference node and the first terminal, and a control method of an LED lamp lighting circuit comprising: When the magnitude of the second potential difference is equal to or higher than a preset threshold voltage, the indicator LED element of the indicator circuit is turned on, On the other hand, when the magnitude of the second potential difference is less than the threshold voltage, the indicator LED element of the indicator circuit is turned off.
- An LED lamp driving circuit is connected between a first power supply terminal and a second power supply terminal of a lamp drive power supply, receives a drive current from the lamp drive power supply, and is connected in series by the drive current.
- An LED lamp lighting circuit for lighting a plurality of LED lamps connected to the first terminal connected to the first power supply terminal, the second terminal connected to the second power supply terminal, and 1 Consists of one LED lamp or a plurality of LED lamps connected in series, one end of which is connected to the first terminal, and one LED lamp or a plurality of LED lamps connected in series
- a second ramp circuit having one end connected to the other end of the first ramp circuit and the other end connected to the second terminal; a reference node connected to the other end of the first ramp circuit;
- the first connected to the first terminal A switch circuit for switching between a state in which the contact is conducted and a state in which the reference node and the second contact are conducted, and one end connected to the second contact and the other end to the second terminal Including a connected control switch element, a switch
- the indicator circuit turns on the indicator LED element when the magnitude of the second potential difference is greater than or equal to a preset threshold voltage, while when the magnitude of the second potential difference is less than the threshold voltage. Turns off the indicator LED element.
- the LED lamp lighting circuit is configured to control the lighting of the indicator LED element according to the second potential difference (potential difference of the LED lamp circuit), so that it is simpler and less expensive using a relay, a transistor, or the like.
- a simple circuit configuration can be applied.
- the LED lamp lighting circuit according to the present embodiment can be configured more simply and inexpensively.
- FIG. 1 is a circuit diagram showing an example of a configuration of a system 1000 including a lamp driving power source according to the first embodiment which is an aspect of the present invention.
- FIG. 2 is a circuit diagram showing an example of a configuration of a system 2000 including a lamp driving power source according to the second embodiment which is an aspect of the present invention.
- FIG. 3 is a circuit diagram showing an example of a configuration of a system 3000 including a lamp driving power source according to the third embodiment which is an aspect of the present invention.
- FIG. 4 is a circuit diagram showing an example of a configuration of a system 4000 including a lamp driving power source according to the fourth embodiment which is an aspect of the present invention.
- FIG. 5 is a circuit diagram showing an example of a configuration of a system 5000 including a lamp driving power source according to the fifth embodiment which is an aspect of the present invention.
- the system 1000 includes an alternator G, a lamp driving power source 10 to which electric power is supplied from the alternator G, and an LED lamp lighting circuit 100 (FIG. 1).
- the example shown in FIG. 1 is an example of a lamp driving power source that drives a headlamp of a vehicle.
- An LED lamp lighting circuit 100 is connected to the lamp driving power source 10.
- An AC generator G is connected to the lamp driving power source 10.
- the AC generator G is a single-phase AC generator, and is configured to generate AC power by rotating in conjunction with an engine of a vehicle, for example.
- One end G1 of the AC generator G is connected to the first input terminal TI1 of the lamp driving power source 10, and the other end G2 is grounded.
- the AC generator G is configured to output the generated AC voltage VA to the lamp driving power source 10.
- the first power supply terminal TS1 on the negative voltage side (low potential side) of the lamp driving power supply 10 is connected to the first terminal Ta1 of the LED lamp lighting circuit 100, and the positive voltage side (high potential) of the lamp driving power supply 10 is used.
- the second power supply terminal TS2 is connected to the second terminal Ta2 of the LED lamp lighting circuit 100.
- the lamp driving power source 10 supplies the LED lamp lighting circuit 100 with a driving current for rectifying the AC current of the AC generator G and lighting the LED lamp.
- the LED lamp lighting circuit 100 is connected between the first power supply terminal TS1 on the low potential side of the lamp drive power supply 10 and the second power supply terminal TS2 on the high potential side, and the drive current from the lamp drive power supply 10 is reduced.
- a plurality of LED lamps connected in series are lit by the drive current when supplied.
- the LED lamp lighting circuit 100 includes, for example, a first lamp circuit L1 and a second lamp circuit L2, which are connected between the first terminal Ta1 and the second terminal Ta2, a switch circuit SW1, and a control circuit.
- the first terminal Ta1 is connected to the first power supply terminal TS1.
- the second terminal Ta2 is connected to the second power supply terminal TS2.
- the first lamp circuit L1 is composed of one LED lamp or a plurality of LED lamps connected in series, and one end thereof is connected to the first terminal Ta1.
- the first lamp circuit L1 is configured by connecting two LED lamps LH1 and LH2 in series.
- one end of the first lamp circuit L1 is the cathode side of the LED lamp LH1 of the first lamp circuit L1.
- the other end of the first lamp circuit L1 is the anode side of the LED lamp LH2 of the first lamp circuit L1.
- the LED lamp of the first lamp circuit L1 is, for example, a high beam lamp (for example, a driving headlamp) of a vehicle headlamp.
- the second lamp circuit L2 is composed of one LED lamp or a plurality of LED lamps connected in series, one end is connected to the other end of the first lamp circuit L1, and the other end is connected to the second terminal Ta2. It is connected.
- the second lamp circuit L2 includes two LED lamps LL1 and LL2 connected in series.
- one end of the second lamp circuit L2 is the cathode side of the LED lamp LL1 of the second lamp circuit L2.
- the other end of the second lamp circuit L2 is the anode side of the LED lamp LL2 of the second lamp circuit L2.
- the LED lamp of the second lamp circuit L2 is, for example, a low beam lamp (for example, a headlight for passing) of the headlamp.
- the switch circuit SW1 is connected between the reference node NB connected to the other end of the first ramp circuit L1 and the first contact NS1 connected to the first terminal Ta1, or the reference node NB. Only one of the second contacts NS2 is conducted.
- the switch circuit SW1 when the switch circuit SW1 is operated, the reference node NB connected to the other end of the first ramp circuit L1 and the first contact NS1 connected to the first terminal Ta1 become conductive.
- the LED lamps LH1 and LH2 of the first lamp circuit L1 are short-circuited. Thereby, since no current flows through the first lamp circuit L1, the LED lamps LH1 and LH2 of the first lamp circuit L1 are turned off.
- the switch circuit SW1 switches between the high beam (the first lamp circuit L1 and the second lamp circuit L2 are turned on) Hi and the low beam (the second lamp circuit L2 is turned on) Lo of the vehicle headlamp described above. It is a switch for.
- the switch circuit SW1 is manually controlled by the user.
- the control switch element SCR has one end connected to the second contact NS2 and the other end connected to the second terminal Ta2.
- the control switch element SCR is a thyristor having a cathode connected to the second contact NS2 and an anode connected to the second terminal Ta2.
- the switch control circuit C1 controls the control switch element SCR according to the potential difference between the second contact NS2 and the second terminal Ta2.
- the switch control circuit C1 controls the switch element SCR for control. Is supposed to turn on.
- the reference voltage is compared with the magnitude (absolute value) of the value (the same applies hereinafter).
- the switch control circuit C1 turns off the control switch element SCR when the magnitude (absolute value) of the potential difference between the second contact NS2 and the second terminal Ta2 is less than the reference voltage. It is like that.
- the switch control circuit C1 includes, for example, a first control resistor Rs, a second control resistor Rt, and a Zener diode Ze (FIG. 1).
- One end of the first control resistor Rs is connected to the second contact NS2, and the other end is connected to the gate (control terminal) of the thyristor (control switch element) SCR.
- One end of the second control resistor Rt is connected to the other end of the first control resistor Rs.
- the Zener diode Ze has an anode connected to the other end of the second control resistor Rt and a cathode connected to the second terminal Ta2.
- the switch control circuit C1 is configured to monitor the voltage of the second contact NS2 by the first control resistor Rs, the second control resistor Rt, and the Zener diode Ze.
- Zener diode Ze is turned on and a current flows through the second control resistor Rt, whereby a voltage is generated between the anode and the gate of the control switch element (thyristor) SCR. This voltage causes a gate current to flow through the gate of the control switch element SCR, and the control switch element SCR is turned on.
- the reference voltage can be set to a desired value by the resistance values of the first control resistor Rs and the second control resistor Rt and the breakdown voltage of the Zener diode Ze.
- the LED lamp lighting circuit 100 includes the plurality of LED lamps LH1, LH2, LL1, and LL2 connected in series between the first terminal Ta1 and the second terminal Ta2. Among the LH1, LH2, LL1, and LL2, the LED lamps that are lit can be switched (FIG. 1).
- the lamp drive power supply 10 described above includes, for example, a first input terminal TI1, a second input terminal TI2, a first power supply terminal TS1, a second power supply terminal TS2, and a power switch element.
- X a capacitor CX, a detection resistor RX, and a drive control circuit CON (FIG. 1).
- the first input terminal TI1 is connected to one end G1 of the AC generator G.
- the second input terminal TI2 is connected to the other end G2 of the AC generator G via a ground.
- the power switch element X has one end connected to the first input terminal TI1 and the other end connected to the first power terminal TS1.
- the power switch element X has, for example, a cathode connected to the first input terminal TI1, an anode connected to the first power terminal TS1, and a gate having a control signal from the drive control circuit CON. Is a thyristor to which is input.
- the capacitor CX has one end connected to the other end of the power switch element X and the other end connected to the second input terminal TI2.
- This capacitor CX is a smoothing capacitor (electrolytic capacitor).
- the detection resistor RX has one end connected to the second input terminal TI2 and the other end connected to the second power supply terminal TS2.
- the drive control circuit CON controls the power switch element X so that the current flowing through the detection resistor RX is constant.
- the power switch element (thyristor) X rectifies the negative-side voltage of the AC voltage VA output from the AC generator G based on the control of the drive control circuit CON, and supplies the LED lamp lighting circuit 100 with the half-wave rectification. A drive current is supplied.
- the power switch element (thyristor) X charges the capacitor CX during the conduction period.
- the capacitor CX serves as a rectifying and smoothing capacitor for supplying current to the LED lamp lighting circuit 100 during the non-conduction period of the power switch element (thyristor) X.
- the drive control circuit CON controls the conduction timing (ignition phase) of the power switch element (thyristor) X so that the effective value or average value of the current flowing through the LED lamp lighting circuit 100 is constant.
- the drive control circuit CON is configured so that the potential difference between the first power supply terminal TS1 and the second power supply terminal TS2 becomes a preset specified voltage.
- the power switch element X is controlled.
- the lamp driving power source 10 has a constant voltage control function and a constant current control function.
- the constant current control function allows a constant current to flow to the LED lamp. (A constant current is output from the second power supply terminal TS2).
- the case where the current can be supplied to the LED lamp is a case where the LED lamp is not broken (conducted).
- the constant voltage control function The output voltage output between the first power supply terminal TS1 and the second power supply terminal TS2 is raised to a preset specified voltage to be a constant voltage.
- the case where the current cannot be supplied to the LED lamp is a case where the LED lamp is broken (disconnected) and is in an open load state.
- the indicator circuit 11 includes an indicator LED element LG that is lit (emitted) in synchronization with the lighting of the first LED circuit L1 (FIG. 1).
- the indicator circuit 11 controls the lighting of the indicator LED element LG according to the second potential difference between the reference node NB and the first terminal Ta1.
- the indicator circuit 11 uses the indicator LED element LG. Lights up.
- the indicator circuit 11 turns off the indicator LED element LG when the magnitude of the second potential difference is less than the threshold voltage (that is, when the first LED circuit L1 is turned off).
- the indicator circuit 11 is connected between the indicator LED element LG, the coil Lx connected between the reference node NB and the first terminal Ta1, the indicator power supply, and the ground. And a relay RE that is turned on when the current flowing through the coil Lx is equal to or greater than a specified value and turned off when the current flowing through the coil Lx is less than the specified value.
- the indicator circuit 11 includes a first resistor R1 connected in series with the relay RE and the indicator LED element LG between the indicator power source and the ground, and between the reference node NB and the first terminal Ta1. And a second resistor R2 connected in series with the coil Lx.
- the indicator LED element LG is connected in series with the relay RE so that the cathode is connected to the ground side and the anode is connected to the indicator power source side between the indicator power source and the ground. It is connected.
- the relay RE is turned on when the current flowing through the coil Lx is equal to or greater than a specified value (that is, when the first LED circuit L1 is lit). In this case, a current flows through the indicator LED element LG.
- the indicator LED element LG is lit.
- the relay RE is turned off when the current flowing through the coil Lx is less than the specified value (that is, when the first LED circuit L1 is turned off). In this case, no current flows through the indicator LED element LG.
- the indicator LED element LG is turned off.
- the indicator circuit 11 lights (emits light) in synchronization with the lighting of the first LED circuit L1.
- the LED lamp lighting circuit 100 is configured to short-circuit any of the LED lamps that are lit from the state in which any of the plurality of LED lamps connected in series is lit. Yes. By short-circuiting the lit LED lamp, no current flows through the LED lamp, and as a result, the LED lamp is turned off.
- the switch circuit SW1 conducts between the reference node NB and the second contact NS2.
- the switch circuit SW1 is switched by the user so that the high beam Hi is selected.
- the indicator circuit 11 has an indicator LED element LG because the magnitude of the second potential difference is equal to or greater than a preset threshold voltage (that is, the first LED circuit L1 is lit). Lights up.
- the switch circuit SW1 is operated by the user, and the first node connected to the reference node NB and the first terminal Ta1 from the state in which the reference node NB and the second contact NS2 are conducted.
- the contact NS1 is switched to a conductive state.
- the switch control circuit C1 turns off the control switch element SCR.
- the switch circuit SW1 is switched by the user so that the low beam Lo is selected.
- the LED lamp lighting circuit 100 is lit from a state in which all the LED lamps LH1, LH2, LL1, and LL2 among the plurality of LED lamps LH1, LH2, LL1, and LL2 connected in series are lit. LED lamps LH1 and LH2 are short-circuited.
- the indicator circuit 11 turns off the indicator LED element LG because the magnitude of the second potential difference is less than the threshold voltage (that is, the first LED circuit L1 is turned off).
- the switch circuit SW1 is operated to conduct between the reference node NB and the second contact NS2.
- the switch control circuit C1 is used for the control when the magnitude (absolute value) of the potential difference between the second contact NS2 and the second terminal Ta2 is less than the reference voltage.
- the switch element SCR is turned off. Therefore, current IX does not flow.
- the switch control circuit C1 turns on the control switch element SCR.
- the LED lamps LH1 and LH2 of the first lamp circuit L1 are turned on.
- the LED lamp lighting circuit is connected between the first power supply terminal and the second power supply terminal of the lamp drive power supply and receives a drive current from the lamp drive power supply.
- An LED lamp lighting circuit for lighting a plurality of LED lamps connected in series by a drive current, a first terminal connected to the first power supply terminal and a second terminal connected to the second power supply terminal And a plurality of LED lamps connected in series, one end of which is connected to the first terminal and one LED lamp or a plurality of LEDs connected in series.
- a second lamp circuit having one end connected to the other end of the first lamp circuit, the other end connected to the second terminal, and the other end of the first lamp circuit. Connected to the connected reference node and the first terminal.
- a control switch element connected to the second terminal a switch control circuit for controlling the control switch element in accordance with a first potential difference between one end and the other end of the control switch element, and an indicator LED
- the indicator LED When the magnitude of the second potential difference is greater than or equal to a preset threshold voltage, the indicator LED lights the indicator LED element LG, while when the magnitude of the second potential difference is less than the threshold voltage.
- the indicator LED element LG is turned off.
- the LED lamp lighting circuit is configured to control the lighting of the indicator LED element LG in accordance with the second potential difference (potential difference of the LED lamp circuit), so that a simpler and less expensive circuit using a relay. Configuration can be applied.
- the LED lamp lighting circuit according to the present embodiment can be configured more simply and inexpensively.
- FIG. 2 shows a system 2000 according to the second embodiment.
- the system 2000 includes an AC generator G, a lamp driving power source 10 to which power is supplied from the AC generator G, and an LED lamp lighting circuit 100. (FIG. 2).
- the LED lamp lighting circuit 100 includes a first lamp circuit L1 and a second lamp circuit L2 connected between the first terminal Ta1 and the second terminal Ta2,
- the indicator circuit 11 includes the first resistor R1 connected between the indicator power supply and the first node N1, the indicator power supply, and the first power supply.
- a first Zener diode Z1 connected in series with a first resistor so that the cathode is connected to the indicator power supply side and the anode is connected to the first node N1 side between the node N1 and the node N1; Prepare.
- the indicator circuit 11 includes a second Zener diode Z2 having a cathode connected to the first node N1, an anode connected to the first terminal Ta1, and a second resistor having one end connected to the first node N1.
- R2 and a first diode D1 having a cathode connected to the reference node NB and an anode connected to the other end of the second resistor R2.
- the indicator LED element LG has a cathode connected to the first terminal Ta1 and an anode connected to the other end of the second resistor R2.
- the indicator circuit 11 controls the lighting of the indicator LED element LG according to the second potential difference between the reference node NB and the first terminal Ta1.
- the switch circuit SW1 when the switch circuit SW1 is conducting between the reference node NB and the second contact NS2 (that is, when the first LED circuit L1 is lit), the second Zener diode Z2 is not conducting. . In this case, a current flows through the indicator LED element LG.
- the indicator LED element LG is lit.
- the switch circuit SW1 when the switch circuit SW1 is conducting between the reference node NB and the first contact NS1 (that is, when the first LED circuit L1 is turned off), the second Zener diode Z2 is conducted. . In this case, no current flows through the indicator LED element LG.
- the indicator LED element LG is turned off.
- the indicator circuit 11 lights (emits light) in synchronization with the lighting of the first LED circuit L1.
- LED lamp lighting circuit 100 Other configurations of the LED lamp lighting circuit 100 are the same as those of the LED lamp lighting circuit 100 shown in FIG.
- the other operating characteristics of the LED lamp lighting circuit 100 having the above-described configuration are the same as those in the first embodiment.
- the LED element for indicator LG is turned on according to the second potential difference (potential difference of the LED lamp circuit) as in the first embodiment. Therefore, a simpler and cheaper circuit configuration using a transistor or the like can be applied.
- the LED lamp lighting circuit according to the present embodiment can be configured more simply and inexpensively.
- the system 3000 includes an AC generator G, a lamp driving power source 10 to which power is supplied from the AC generator G, and an LED lamp lighting circuit 100. (Figure 3).
- the LED lamp lighting circuit 100 includes a first lamp circuit L1 and a second lamp circuit L2 connected between the first terminal Ta1 and the second terminal Ta2, It has a switch circuit SW1, a control switch element SCR, a switch control circuit C1 that controls the switch circuit SW1, and an indicator circuit 11 that emits light in synchronization with the lighting of the first lamp circuit L1 (FIG. 3).
- the indicator circuit 11 includes a first resistor whose one end is connected to the indicator power source (via the fourth and fifth resistors R4 and R5).
- R1 a collector connected to the other end of the first resistor R1, an emitter connected to the first terminal Ta1, and an NPN bipolar transistor Q1 connected between the emitter and base of the NPN bipolar transistor Q1.
- a second resistor R2 and a third resistor R3 connected between the base of the NPN bipolar transistor Q1 and the reference node NB.
- the indicator circuit 11 includes the above-described fourth resistor R4, the indicator LED element LG, and the indicator switch element Q2 connected in series between the indicator power supply and the ground.
- the indicator switch element Q2 is a PNP bipolar transistor.
- the fifth resistor R5 described above is connected between the base and emitter of this PNP-type bipolar transistor.
- the indicator LED element LG is connected in series with the indicator switch element Q2 between the indicator power source and the ground so that the cathode is connected to the ground side and the anode is connected to the indicator power source side. ing.
- the indicator switch element Q2 is turned on when the current flowing through the NPN bipolar transistor Q1 is equal to or greater than a specified value.
- the indicator switch element Q2 is turned off when the current flowing through the NPN bipolar transistor Q2 is less than the specified value.
- the indicator circuit 11 controls the lighting of the indicator LED element LG according to the second potential difference between the reference node NB and the first terminal Ta1.
- the switch circuit SW1 when the switch circuit SW1 is electrically connected between the reference node NB and the second contact NS2 (that is, when the first LED circuit L1 is lit), the current flowing through the NPN bipolar transistor Q1 is Beyond the specified value. In this case, the indicator switch element Q2 is turned on, and a current flows through the indicator LED element LG.
- the indicator LED element LG is lit.
- the switch circuit SW1 when the switch circuit SW1 is conducting between the reference node NB and the first contact NS1 (that is, when the first LED circuit L1 is turned off), the current flowing through the NPN bipolar transistor Q1 is Less than the specified value. In this case, the indicator switch element Q2 is turned off, and no current flows through the indicator LED element LG.
- the indicator LED element LG is turned off.
- the indicator circuit 11 lights (emits light) in synchronization with the lighting of the first LED circuit L1.
- LED lamp lighting circuit 100 Other configurations of the LED lamp lighting circuit 100 are the same as those of the LED lamp lighting circuit 100 shown in FIG.
- the other operating characteristics of the LED lamp lighting circuit 100 having the above-described configuration are the same as those in the first embodiment.
- the indicator LED element LG is turned on according to the second potential difference (potential difference of the LED lamp circuit), as in the first embodiment. Therefore, a simpler and cheaper circuit configuration using a transistor or the like can be applied.
- the LED lamp lighting circuit according to the present embodiment can be configured more simply and inexpensively.
- a system 4000 according to the fourth embodiment includes an AC generator G, a lamp driving power source 10 to which power is supplied from the AC generator G, and an LED lamp lighting circuit 100. (FIG. 4).
- the LED lamp lighting circuit 100 includes a first lamp circuit L1 and a second lamp circuit L2 connected between the first terminal Ta1 and the second terminal Ta2, It has a switch circuit SW1, a control switch element SCR, a switch control circuit C1 that controls the switch circuit SW1, and an indicator circuit 11 that emits light in synchronization with the lighting of the first lamp circuit L1 (FIG. 4).
- the indicator circuit 11 includes an indicator LED element LG having a cathode connected to the first node N1 and an anode connected to the ground.
- the indicator circuit 11 includes an NPN having one end connected to the first node N1, a collector connected to the other end of the first resistor R1, and an emitter connected to the first terminal Ta1.
- the indicator circuit 11 controls the lighting of the indicator LED element LG according to the second potential difference between the reference node NB and the first terminal Ta1.
- the switch circuit SW1 when the switch circuit SW1 is electrically connected between the reference node NB and the second contact NS2 (that is, when the first LED circuit L1 is lit), the current flowing through the NPN bipolar transistor Q1 is It exceeds the specified value (flows). In this case, a current flows through the indicator LED element LG.
- the indicator LED element LG is lit.
- the switch circuit SW1 when the switch circuit SW1 is conducting between the reference node NB and the first contact NS1 (that is, when the first LED circuit L1 is turned off), the current flowing through the NPN bipolar transistor Q1 is Less than the specified value (does not flow). In this case, no current flows through the indicator LED element LG.
- the indicator LED element LG is turned off.
- the indicator circuit 11 lights (emits light) in synchronization with the lighting of the first LED circuit L1.
- LED lamp lighting circuit 100 Other configurations of the LED lamp lighting circuit 100 are the same as those of the LED lamp lighting circuit 100 shown in FIG.
- the other operating characteristics of the LED lamp lighting circuit 100 having the above-described configuration are the same as those in the first embodiment.
- the indicator LED element LG is turned on according to the second potential difference (potential difference of the LED lamp circuit). Therefore, a simpler and cheaper circuit configuration using a transistor or the like can be applied.
- the LED lamp lighting circuit according to the present embodiment can be configured more simply and inexpensively.
- a system 5000 includes an AC generator G, a lamp driving power source 10 to which electric power is supplied from the AC generator G, and an LED lamp lighting circuit 100. (FIG. 5).
- the LED lamp lighting circuit 100 includes a first lamp circuit L1 and a second lamp circuit L2 connected between the first terminal Ta1 and the second terminal Ta2,
- the indicator circuit 11 has an anode between the first node N ⁇ b> 1 and the ground as compared with the fourth embodiment (FIG. 4). It further includes a Zener diode Z connected in series with the indicator LED element LG so as to be connected to the one node N1 side and the cathode connected to the ground side.
- the zener diode Z is supplied with current from the capacitor CX to the indicator LED element LG via the ground. To prevent the flow.
- LED lamp lighting circuit 100 Other configurations of the LED lamp lighting circuit 100 are the same as those of the LED lamp lighting circuit 100 shown in FIG.
- the other operational characteristics of the LED lamp lighting circuit 100 having the above configuration are the same as those in the fourth embodiment.
- the indicator LED element LG is turned on according to the second potential difference (the potential difference of the LED lamp circuit). Therefore, a simpler and cheaper circuit configuration using a transistor or the like can be applied.
- the LED lamp lighting circuit according to the present embodiment can be configured more simply and inexpensively.
- the LED lamp of the first lamp circuit is a high beam lamp of a vehicle headlamp
- the LED lamp of the second lamp circuit is a low beam lamp of the headlamp.
- the LED lamp of the first lamp circuit may be a low beam lamp of a vehicle headlamp
- the LED lamp of the second lamp circuit may be a high beam lamp of the headlamp
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Circuit Arrangement For Electric Light Sources In General (AREA)
Abstract
Description
ランプ駆動電源の第1の電源端子と第2の電源端子との間に接続され、前記ランプ駆動電源から駆動電流の供給を受け、前記駆動電流により直列に接続された複数のLEDランプを点灯するLEDランプ点灯回路であって、
前記第1の電源端子に接続される第1の端子と、前記第2の電源端子に接続される第2の端子と、
1つのLEDランプ又は直列に接続された複数のLEDランプで構成され、一端が前記第1の端子に接続された第1のランプ回路と、
1つのLEDランプ又は直列に接続された複数のLEDランプで構成され、一端が前記第1のランプ回路の他端に接続され、他端が前記第2の端子に接続されたた第2のランプ回路と、
前記第1のランプ回路の他端に接続された基準ノードと前記第1の端子に接続された第1の接点との間が導通した状態と、前記基準ノードと第2の接点との間が導通した状態と、を切り替えるスイッチ回路と、
一端が前記第2の接点に接続され且つ他端が前記第2の端子に接続された制御用スイッチ素子と、
前記制御用スイッチ素子の一端と他端との間の第1の電位差に応じて、前記制御用スイッチ素子を制御するスイッチ制御回路と、
インジケータ用LED素子を含み、前記基準ノードと前記第1の端子との間の第2の電位差に応じて前記インジケータ用LED素子の点灯を制御するインジケータ回路と、を備え、
前記インジケータ回路は、前記第2の電位差の大きさが、予め設定された閾値電圧以上の場合には、前記インジケータ用LED素子を点灯し、一方、前記第2の電位差の大きさが、前記閾値電圧未満の場合には、前記インジケータ用LED素子を消灯する
ことを特徴とする。
前記インジケータ回路は、
前記基準ノードと前記第1の端子との間に接続されたコイルと、
インジケータ用電源と接地との間に接続され、前記コイルに流れる電流が規定値以上の場合にオンし、前記コイルに流れる電流が前記規定値未満の場合にオフするリレーと、をさらに含み、
前記インジケータ用LED素子は、
前記インジケータ用電源と前記接地との間で、カソードが前記接地側に接続され且つアノードが前記インジケータ用電源側に接続されるように、前記リレーと直列に接続されている
ことを特徴とする。
前記インジケータ回路は、
インジケータ用電源と第1ノードとの間に接続された第1の抵抗と、
前記インジケータ用電源と前記第1ノードとの間で、カソードがインジケータ用電源側に接続され且つアノードが前記第1ノード側に接続されるように、前記第1の抵抗と直列に接続された第1のツェナーダイオードと、
カソードが前記第1ノードに接続され、アノードが前記第1の端子に接続された第2のツェナーダイオードと、
一端が前記第1ノードに接続された第2の抵抗と、
カソードが前記基準ノードに接続され、アノードが前記第2の抵抗の他端に接続された第1のダイオードと、をさらに含み、
前記インジケータ用LED素子は、
カソードが前記第1の端子に接続され且つアノードが前記第2の抵抗の他端に接続されていることを特徴とする。
前記インジケータ回路は、
一端がインジケータ用電源に接続された第1の抵抗と、
コレクタが前記第1の抵抗の他端に接続され、エミッタが前記第1の端子に接続されたNPN型バイポーラトランジスタと、
前記NPN型バイポーラトランジスタのエミッタとベースとの間に接続された第2の抵抗と、
前記NPN型バイポーラトランジスタのベースと前記基準ノードとの間に接続された第3の抵抗と、
前記インジケータ用電源と接地との間に接続され、前記NPN型バイポーラトランジスタに流れる電流が規定値以上の場合にオンし、前記NPN型バイポーラトランジスタに流れる電流が前記規定値未満の場合にオフするインジケータ用スイッチ素子と、をさらに含み、
前記インジケータ用LED素子は、
前記インジケータ用電源と前記接地との間で、カソードが前記接地側に接続され且つアノードが前記インジケータ用電源側に接続されるように、前記インジケータ用スイッチ素子と直列に接続されている
ことを特徴とする。
前記インジケータ回路は、
一端が第1ノードに接続された第1の抵抗と、
コレクタが前記第1の抵抗の他端に接続され、エミッタが前記第1の端子に接続されたNPN型バイポーラトランジスタと、
前記NPN型バイポーラトランジスタのエミッタとベースとの間に接続された第2の抵抗と、
前記NPN型バイポーラトランジスタのベースと前記基準ノードとの間に接続された第3の抵抗と、をさらに含み、
前記インジケータ用LED素子は、
カソードが前記第1ノードに接続され、アノードが前記接地に接続されていることを特徴とする。
前記インジケータ回路は、
前記第1ノードと前記接地との間で、アノードが前記第1ノード側に接続され、カソードが前記接地側に接続されるように、前記インジケータ用LED素子と直列に接続されたツェナーダイオードをさらに備える
ことを特徴とする。
前記スイッチ制御回路は、
前記制御用スイッチ素子の一端と他端との間の第1の電位差の大きさが、予め設定された基準電圧以上の場合には、前記制御用スイッチ素子をオンし、
前記制御用スイッチ素子の一端と他端との間の第1の電位差の大きさが、前記基準電圧未満の場合には、前記制御用スイッチ素子をオフする
ことを特徴とする。
前記第1の電源端子は、前記ランプ駆動電源の低電位側の電源端子であり、前記第2の電源端子は、前記ランプ駆動電源の高電位側の電源端子である
ことを特徴とする。
前記ランプ駆動電源は、
定電圧制御機能と定電流制御機能を有して構成されており、
前記第1のランプ回路および前記第2のランプ回路中の何れかのLEDランプに電流を流せる場合には、前記定電流制御機能により、前記LEDランプに定電流を流し、
前記第1のランプ回路および前記第2のランプ回路中の何れのLEDランプにも電流を流せない場合には、前記定電圧制御機能により、前記第1の電源端子と前記第2の電源端子との間に出力する出力電圧を、予め設定された規定電圧まで上昇させて一定の電圧にする
ことを特徴とする。
前記制御用スイッチ素子は、カソードが前記第2の接点に接続され、アノードが前記第2の端子に接続されたサイリスタである
ことを特徴とする。
前記スイッチ制御回路は、
一端が前記第2の接点に接続され、他端が前記サイリスタのゲートに接続された第1の制御抵抗と、一端が前記第1の制御抵抗の他端に接続された第2の制御抵抗と、アノードが前記第2の制御抵抗の他端に接続され、カソードが前記第2の端子に接続されたツェナーダイオードと、を有する
ことを特徴とする。
前記制御用スイッチ素子は、カソードが前記第1の端子に接続され、アノードが前記第1の接点に接続されたサイリスタである
ことを特徴とする。
前記スイッチ制御回路は、
一端が前記第1の端子に接続され、他端が前記サイリスタのゲートに接続された第1の制御抵抗と、
一端が前記第1の制御抵抗の他端に接続された第2の制御抵抗と、
アノードが前記第2の制御抵抗の他端に接続され、カソードが前記第1の接点に接続されたツェナーダイオードと、を有する
ことを特徴とする。
前記スイッチ回路は、
使用者により手動で、前記基準ノードと前記第1の接点との間を導通する状態と、前記基準ノードと前記第2の接点との間を導通する状態とを、切り替えられるようになっている
ことを特徴とする。
ランプ駆動電源の第1の電源端子と第2の電源端子との間に接続され、前記ランプ駆動電源から駆動電流の供給を受け、前記駆動電流により直列に接続された複数のLEDランプを点灯するLEDランプ点灯回路であって、前記第1の電源端子に接続される第1の端子と、前記第2の電源端子に接続される第2の端子と、1つのLEDランプ又は直列に接続された複数のLEDランプで構成され、一端が前記第1の端子に接続された第1のランプ回路と、1つのLEDランプ又は直列に接続された複数のLEDランプで構成され、一端が前記第1のランプ回路の他端に接続され、他端が前記第2の端子に接続されたた第2のランプ回路と、前記第1のランプ回路の他端に接続された基準ノードと前記第1の端子に接続された第1の接点との間が導通した状態と、前記基準ノードと第2の接点との間が導通した状態と、を切り替えるスイッチ回路と、一端が前記第2の接点に接続され且つ他端が前記第2の端子に接続された制御用スイッチ素子と、前記制御用スイッチ素子の一端と他端との間の第1の電位差に応じて、前記制御用スイッチ素子を制御するスイッチ制御回路と、インジケータ用LED素子を含み、前記基準ノードと前記第1の端子との間の第2の電位差に応じて前記インジケータ用LED素子の点灯を制御するインジケータ回路と、を備えたLEDランプ点灯回路の制御方法であって、
前記第2の電位差の大きさが、予め設定された閾値電圧以上の場合には、前記インジケータ回路の前記インジケータ用LED素子を点灯し、
一方、前記第2の電位差の大きさが、前記閾値電圧未満の場合には、前記インジケータ回路の前記インジケータ用LED素子を消灯する
ことを特徴とする。
第1の制御抵抗Rsは、一端が第2の接点NS2に接続され、他端がサイリスタ(制御用スイッチ素子)SCRのゲート(制御端子)に接続されている。
Claims (15)
- ランプ駆動電源の第1の電源端子と第2の電源端子との間に接続され、前記ランプ駆動電源から駆動電流の供給を受け、前記駆動電流により直列に接続された複数のLEDランプを点灯するLEDランプ点灯回路であって、
前記第1の電源端子に接続される第1の端子と、前記第2の電源端子に接続される第2の端子と、
1つのLEDランプ又は直列に接続された複数のLEDランプで構成され、一端が前記第1の端子に接続された第1のランプ回路と、
1つのLEDランプ又は直列に接続された複数のLEDランプで構成され、一端が前記第1のランプ回路の他端に接続され、他端が前記第2の端子に接続されたた第2のランプ回路と、
前記第1のランプ回路の他端に接続された基準ノードと前記第1の端子に接続された第1の接点との間が導通した状態と、前記基準ノードと第2の接点との間が導通した状態と、を切り替えるスイッチ回路と、
一端が前記第2の接点に接続され且つ他端が前記第2の端子に接続された制御用スイッチ素子と、
前記制御用スイッチ素子の一端と他端との間の第1の電位差に応じて、前記制御用スイッチ素子を制御するスイッチ制御回路と、
インジケータ用LED素子を含み、前記基準ノードと前記第1の端子との間の第2の電位差に応じて前記インジケータ用LED素子の点灯を制御するインジケータ回路と、を備え、
前記インジケータ回路は、前記第2の電位差の大きさが、予め設定された閾値電圧以上の場合には、前記インジケータ用LED素子を点灯し、一方、前記第2の電位差の大きさが、前記閾値電圧未満の場合には、前記インジケータ用LED素子を消灯する
ことを特徴とするLEDランプ点灯回路。 - 前記インジケータ回路は、
前記基準ノードと前記第1の端子との間に接続されたコイルと、
インジケータ用電源と接地との間に接続され、前記コイルに流れる電流が規定値以上の場合にオンし、前記コイルに流れる電流が前記規定値未満の場合にオフするリレーと、をさらに含み、
前記インジケータ用LED素子は、
前記インジケータ用電源と前記接地との間で、カソードが前記接地側に接続され且つアノードが前記インジケータ用電源側に接続されるように、前記リレーと直列に接続されている
ことを特徴とする請求項1に記載のLEDランプ点灯回路。 - 前記インジケータ回路は、
インジケータ用電源と第1ノードとの間に接続された第1の抵抗と、
前記インジケータ用電源と前記第1ノードとの間で、カソードがインジケータ用電源側に接続され且つアノードが前記第1ノード側に接続されるように、前記第1の抵抗と直列に接続された第1のツェナーダイオードと、
カソードが前記第1ノードに接続され、アノードが前記第1の端子に接続された第2のツェナーダイオードと、
一端が前記第1ノードに接続された第2の抵抗と、
カソードが前記基準ノードに接続され、アノードが前記第2の抵抗の他端に接続された第1のダイオードと、をさらに含み、
前記インジケータ用LED素子は、
カソードが前記第1の端子に接続され且つアノードが前記第2の抵抗の他端に接続されていることを特徴とする請求項1に記載のLEDランプ点灯回路。 - 前記インジケータ回路は、
一端がインジケータ用電源に接続された第1の抵抗と、
コレクタが前記第1の抵抗の他端に接続され、エミッタが前記第1の端子に接続されたNPN型バイポーラトランジスタと、
前記NPN型バイポーラトランジスタのエミッタとベースとの間に接続された第2の抵抗と、
前記NPN型バイポーラトランジスタのベースと前記基準ノードとの間に接続された第3の抵抗と、
前記インジケータ用電源と接地との間に接続され、前記NPN型バイポーラトランジスタに流れる電流が規定値以上の場合にオンし、前記NPN型バイポーラトランジスタに流れる電流が前記規定値未満の場合にオフするインジケータ用スイッチ素子と、をさらに含み、
前記インジケータ用LED素子は、
前記インジケータ用電源と前記接地との間で、カソードが前記接地側に接続され且つアノードが前記インジケータ用電源側に接続されるように、前記インジケータ用スイッチ素子と直列に接続されている
ことを特徴とする請求項1に記載のLEDランプ点灯回路。 - 前記インジケータ回路は、
一端が第1ノードに接続された第1の抵抗と、
コレクタが前記第1の抵抗の他端に接続され、エミッタが前記第1の端子に接続されたNPN型バイポーラトランジスタと、
前記NPN型バイポーラトランジスタのエミッタとベースとの間に接続された第2の抵抗と、
前記NPN型バイポーラトランジスタのベースと前記基準ノードとの間に接続された第3の抵抗と、をさらに含み、
前記インジケータ用LED素子は、
カソードが前記第1ノードに接続され、アノードが前記接地に接続されていることを特徴とする請求項1に記載のLEDランプ点灯回路。 - 前記インジケータ回路は、
前記第1ノードと前記接地との間で、アノードが前記第1ノード側に接続され、カソードが前記接地側に接続されるように、前記インジケータ用LED素子と直列に接続されたツェナーダイオードをさらに備える
ことを特徴とする請求項5に記載のLEDランプ点灯回路。 - 前記スイッチ制御回路は、
前記制御用スイッチ素子の一端と他端との間の第1の電位差の大きさが、予め設定された基準電圧以上の場合には、前記制御用スイッチ素子をオンし、
前記制御用スイッチ素子の一端と他端との間の第1の電位差の大きさが、前記基準電圧未満の場合には、前記制御用スイッチ素子をオフする
ことを特徴とする請求項1に記載のLEDランプ点灯回路。 - 前記第1の電源端子は、前記ランプ駆動電源の低電位側の電源端子であり、前記第2の電源端子は、前記ランプ駆動電源の高電位側の電源端子である
ことを特徴とする請求項7に記載のLEDランプ点灯回路。 - 前記ランプ駆動電源は、
定電圧制御機能と定電流制御機能を有して構成されており、
前記第1のランプ回路および前記第2のランプ回路中の何れかのLEDランプに電流を流せる場合には、前記定電流制御機能により、前記LEDランプに定電流を流し、
前記第1のランプ回路および前記第2のランプ回路中の何れのLEDランプにも電流を流せない場合には、前記定電圧制御機能により、前記第1の電源端子と前記第2の電源端子との間に出力する出力電圧を、予め設定された規定電圧まで上昇させて一定の電圧にする
ことを特徴とする請求項8に記載のLEDランプ点灯回路。 - 前記制御用スイッチ素子は、カソードが前記第2の接点に接続され、アノードが前記第2の端子に接続されたサイリスタである
ことを特徴とする請求項8に記載のLEDランプ点灯回路。 - 前記スイッチ制御回路は、
一端が前記第2の接点に接続され、他端が前記サイリスタのゲートに接続された第1の制御抵抗と、一端が前記第1の制御抵抗の他端に接続された第2の制御抵抗と、アノードが前記第2の制御抵抗の他端に接続され、カソードが前記第2の端子に接続されたツェナーダイオードと、を有する
ことを特徴とする請求項10に記載のLEDランプ点灯回路。 - 前記制御用スイッチ素子は、カソードが前記第1の端子に接続され、アノードが前記第1の接点に接続されたサイリスタである
ことを特徴とする請求項11に記載のLEDランプ点灯回路。 - 前記スイッチ制御回路は、
一端が前記第1の端子に接続され、他端が前記サイリスタのゲートに接続された第1の制御抵抗と、
一端が前記第1の制御抵抗の他端に接続された第2の制御抵抗と、
アノードが前記第2の制御抵抗の他端に接続され、カソードが前記第1の接点に接続されたツェナーダイオードと、を有する
ことを特徴とする請求項12に記載のLEDランプ点灯回路。 - 前記スイッチ回路は、
使用者により手動で、前記基準ノードと前記第1の接点との間を導通する状態と、前記基準ノードと前記第2の接点との間を導通する状態とを、切り替えられるようになっている
ことを特徴とする請求項1に記載のLEDランプ点灯回路。 - ランプ駆動電源の第1の電源端子と第2の電源端子との間に接続され、前記ランプ駆動電源から駆動電流の供給を受け、前記駆動電流により直列に接続された複数のLEDランプを点灯するLEDランプ点灯回路であって、前記第1の電源端子に接続される第1の端子と、前記第2の電源端子に接続される第2の端子と、1つのLEDランプ又は直列に接続された複数のLEDランプで構成され、一端が前記第1の端子に接続された第1のランプ回路と、1つのLEDランプ又は直列に接続された複数のLEDランプで構成され、一端が前記第1のランプ回路の他端に接続され、他端が前記第2の端子に接続されたた第2のランプ回路と、前記第1のランプ回路の他端に接続された基準ノードと前記第1の端子に接続された第1の接点との間が導通した状態と、前記基準ノードと第2の接点との間が導通した状態と、を切り替えるスイッチ回路と、一端が前記第2の接点に接続され且つ他端が前記第2の端子に接続された制御用スイッチ素子と、前記制御用スイッチ素子の一端と他端との間の第1の電位差に応じて、前記制御用スイッチ素子を制御するスイッチ制御回路と、インジケータ用LED素子を含み、前記基準ノードと前記第1の端子との間の第2の電位差に応じて前記インジケータ用LED素子の点灯を制御するインジケータ回路と、を備えたLEDランプ点灯回路の制御方法であって、
前記第2の電位差の大きさが、予め設定された閾値電圧以上の場合には、前記インジケータ回路の前記インジケータ用LED素子を点灯し、
一方、前記第2の電位差の大きさが、前記閾値電圧未満の場合には、前記インジケータ回路の前記インジケータ用LED素子を消灯する
ことを特徴とするLEDランプ点灯回路の制御方法。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2015/053980 WO2016129104A1 (ja) | 2015-02-13 | 2015-02-13 | Ledランプ点灯回路、およびledランプ点灯回路の制御方法 |
JP2016514198A JP6092470B2 (ja) | 2015-02-13 | 2015-02-13 | Ledランプ点灯回路、およびledランプ点灯回路の制御方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2015/053980 WO2016129104A1 (ja) | 2015-02-13 | 2015-02-13 | Ledランプ点灯回路、およびledランプ点灯回路の制御方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2016129104A1 true WO2016129104A1 (ja) | 2016-08-18 |
Family
ID=56614371
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2015/053980 WO2016129104A1 (ja) | 2015-02-13 | 2015-02-13 | Ledランプ点灯回路、およびledランプ点灯回路の制御方法 |
Country Status (2)
Country | Link |
---|---|
JP (1) | JP6092470B2 (ja) |
WO (1) | WO2016129104A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019163074A1 (ja) * | 2018-02-23 | 2019-08-29 | 新電元工業株式会社 | 車両用led点灯制御回路、車両用led点灯制御装置、及び、車両用led点灯制御回路の制御方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS599941U (ja) * | 1982-02-26 | 1984-01-21 | 株式会社東海理化電機製作所 | ヘツドランプのハイビ−ム点灯表示装置 |
JP2002127822A (ja) * | 2000-10-20 | 2002-05-09 | Nippon Seiki Co Ltd | 車両用表示装置 |
JP2008213623A (ja) * | 2007-03-02 | 2008-09-18 | Stanley Electric Co Ltd | Led車両用灯具の点灯制御回路 |
-
2015
- 2015-02-13 JP JP2016514198A patent/JP6092470B2/ja active Active
- 2015-02-13 WO PCT/JP2015/053980 patent/WO2016129104A1/ja active Application Filing
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS599941U (ja) * | 1982-02-26 | 1984-01-21 | 株式会社東海理化電機製作所 | ヘツドランプのハイビ−ム点灯表示装置 |
JP2002127822A (ja) * | 2000-10-20 | 2002-05-09 | Nippon Seiki Co Ltd | 車両用表示装置 |
JP2008213623A (ja) * | 2007-03-02 | 2008-09-18 | Stanley Electric Co Ltd | Led車両用灯具の点灯制御回路 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019163074A1 (ja) * | 2018-02-23 | 2019-08-29 | 新電元工業株式会社 | 車両用led点灯制御回路、車両用led点灯制御装置、及び、車両用led点灯制御回路の制御方法 |
Also Published As
Publication number | Publication date |
---|---|
JPWO2016129104A1 (ja) | 2017-04-27 |
JP6092470B2 (ja) | 2017-03-15 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP5161040B2 (ja) | 車両用灯具の点灯制御装置 | |
US20140252950A1 (en) | Semiconductor light source lighting circuit and vehicular lamp | |
US9162607B2 (en) | Vehicular lamp | |
JP6087960B2 (ja) | Led光源 | |
CN107734738B (zh) | 点亮电路及车辆用灯具 | |
JP5635209B1 (ja) | ランプ駆動電源、および、ランプ駆動電源の制御方法 | |
JP2004136719A (ja) | 点灯回路 | |
US10021755B1 (en) | Lighting device and luminaire | |
KR20160079075A (ko) | 적어도 제 1 및 제 2 캐스케이드 led들을 동작시키기 위한 회로 어셈블리 | |
JP5187756B2 (ja) | 車両用灯具の発光装置 | |
JP2006073352A (ja) | 車両用灯具の点灯制御回路 | |
JP5684432B1 (ja) | ランプ駆動電源、および、ランプ駆動電源の制御方法 | |
JP6092470B2 (ja) | Ledランプ点灯回路、およびledランプ点灯回路の制御方法 | |
JP6062603B1 (ja) | 車両用ledランプ点灯回路、車両用ledランプ点灯装置、および車両用ledランプ点灯回路の制御方法 | |
JP5654175B1 (ja) | Ledランプ点灯装置、および、ledランプ点灯装置の制御方法 | |
JP5992197B2 (ja) | Led点灯装置及びこれを備える表示装置 | |
JP6140890B2 (ja) | 車両用ledランプ点灯回路、車両用ledランプ点灯装置、および車両用ledランプ点灯回路の制御方法 | |
JP6257485B2 (ja) | Led点灯装置 | |
JPWO2019163076A1 (ja) | 車両用led点灯制御装置、及び、車両用led点灯制御装置の制御方法 | |
JP7052004B2 (ja) | 車両用led点灯制御回路、車両用led点灯制御装置、及び、車両用led点灯制御回路の制御方法 | |
JP6884917B2 (ja) | 車両用led点灯制御回路、車両用led点灯制御装置、及び、車両用led点灯制御回路の制御方法 | |
JP2015030442A (ja) | 車両用灯具 | |
JP2018165089A (ja) | 車載用光源点灯装置 | |
JP2006185604A (ja) | 放電ランプ点灯装置および照明器具 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
ENP | Entry into the national phase |
Ref document number: 2016514198 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: IDP00201603474 Country of ref document: ID |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 15881979 Country of ref document: EP Kind code of ref document: A1 |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 15881979 Country of ref document: EP Kind code of ref document: A1 |