JP2018067471A - Light source lighting device, direction indicator lamp, and direction indicator lamp system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a light source lighting device, a direction indicator lamp, and a direction indicator lamp system, in which chained lighting can be achieved at lower power consumption by using a power supply of a simple structure.SOLUTION: A light source lighting device 100 is used in a vehicle lamp including light sources 5-5which are connected in series with each other to a constant current source 4 and which can be freely lit with power supply from the constant current source 4. The light source lighting device 100 includes: detection sections 6-6for detecting power supply to the light sources 5-5; and timer sections 7-7for sequentially lighting the light sources 5-5by lighting the light sources 5-5in response to power supply detected by the detection sections 6-6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a light source lighting device used for a vehicular lamp, a direction indication lamp having the light source lighting device, and a direction indication lamp system including the direction indication lamp.

  Conventionally, a light bulb using a tungsten filament has been used as a light source of a vehicular lamp. In recent years, instead of light bulbs using tungsten filaments, light sources using semiconductor elements such as light emitting diodes (Light Emitting Diodes, LEDs), so-called “semiconductor light sources” have begun to spread. An LED is suitable for a light source of a vehicular lamp because it has low power consumption and long life, and can stabilize brightness by a simple control that supplies a constant current.

  In general, one LED is point emission, and the amount of light emitted by one LED is smaller than the amount of light emitted by a light bulb using a tungsten filament. For this reason, in vehicle lamps, there are many examples in which surface light emission having a sufficient light emission amount is realized by using a plurality of LEDs.

  As described above, in a vehicle lamp, a method using a plurality of light sources is becoming widespread. Along with this, so-called “chained lighting” has started to be adopted, in which the direction of the indication target is clearly displayed by sequentially turning on a plurality of light sources. Patent Document 1 discloses a technique for sequentially lighting a plurality of LEDs connected in series.

International Publication No. 2016/033420

  The traveling light system shown in FIG. 3 of Patent Document 1 includes a plurality of LEDs (302) connected in series and a control circuit (304) including a switch for sequentially lighting the plurality of LEDs (302). Have. In addition, the traveling light system includes a constant current source (306) that supplies a lighting current to the LED (302), and a voltage source (308) that supplies an on / off voltage to the switch. A buck-boost converter or the like is used for the voltage source (308).

  The traveling lamp system shown in FIG. 3 of Patent Document 1 sequentially turns on a plurality of LEDs (302) by decreasing the output voltage of the voltage source (308) linearly with respect to time. At this time, the output voltage of the constant current source (306) rises stepwise according to the number of LEDs (302) that are lit. That is, the traveling light system uses two power supplies (306, 308) having variable output voltages. For this reason, there has been a problem that the structure of the power source becomes complicated.

  On the other hand, the traveling lamp system shown in FIG. 4 of Patent Document 1 uses a voltage source (406) instead of the constant current source (306) and a constant voltage source (408) instead of the voltage source (308). A plurality of LEDs (402) are sequentially turned on using the LED. The traveling light system uses one power source (406) having a variable output voltage, and the structure of the power source can be simplified with respect to the traveling light system shown in FIG.

  However, the traveling lamp system shown in FIG. 4 of Patent Document 1 increases the output voltage of the voltage source (406) linearly with respect to time, and flows to the LED (402) using the current sink (600). The current is adjusted. The current sink (600) is composed of a constant current circuit. The traveling light system has a problem that power loss due to a constant current circuit increases and power consumption increases, particularly when a large current flows through the LED (402).

  The present invention has been made to solve the above-described problems, and is a light source lighting device and a direction indicator lamp capable of realizing chain lighting with low power consumption using a power supply having a simple structure. And it aims at providing a direction indicator light system.

  The light source lighting device of the present invention is a light source lighting device used for a vehicular lamp having a semiconductor light source that is connected in series to a constant current source and that can be turned on by power supply from the constant current source. The detection unit detects power supply to the semiconductor light source, and the timer unit sequentially turns on the semiconductor light source by turning on the semiconductor light source according to the power supply detected by the detection unit.

  According to the present invention, since it is configured as described above, it is possible to realize chain lighting with low power consumption using a power supply with a simple structure.

It is a functional block diagram which shows the state with which the direction indicator light system which concerns on Embodiment 1 of this invention was mounted in the vehicle. It is a circuit diagram which shows the principal part of the constant current source which concerns on Embodiment 1 of this invention. It is a circuit diagram which shows the principal part of the 1st light source which concerns on Embodiment 1 of this invention, a 1st detection part, and a 1st timer part. It is a timing chart which shows operation | movement of the direction indicator light system which concerns on Embodiment 1 of this invention. It is a timing chart which shows operation | movement of the direction indicator light system which concerns on Embodiment 1 of this invention. It is a timing chart which shows operation | movement of the direction indicator light system which concerns on Embodiment 1 of this invention. It is a functional block diagram which shows the state with which the direction indicator light system which concerns on Embodiment 2 of this invention was mounted in the vehicle. It is a circuit diagram which shows the principal part of the 1st light source which concerns on Embodiment 2 of this invention, a 1st detection part, and a 1st timer part. It is a circuit diagram which shows the principal part of the constant voltage source which concerns on Embodiment 2 of this invention. It is a functional block diagram which shows the state with which the direction indicator light system which concerns on Embodiment 3 of this invention was mounted in the vehicle. It is a circuit diagram which shows the principal part of the 1st light source which concerns on Embodiment 3 of this invention, a 1st detection part, and a 1st timer part. It is a functional block diagram which shows the state with which the direction indicator light system which concerns on Embodiment 4 of this invention was mounted in the vehicle. It is a circuit diagram which shows the principal part of the constant current source which concerns on Embodiment 4 of this invention. It is a circuit diagram which shows the principal part of the 1st light source which concerns on Embodiment 4 of this invention, a 1st detection part, a 1st timer part, and a 1st reset part. It is a timing chart which shows operation | movement of the direction indicator light system which concerns on Embodiment 4 of this invention. It is a functional block diagram which shows the state with which the direction indicator light system which concerns on Embodiment 5 of this invention was mounted in the vehicle. It is a circuit diagram which shows the principal part of the constant current source which concerns on Embodiment 5 of this invention. It is a circuit diagram which shows the principal part of the 1st light source which concerns on Embodiment 5 of this invention, a 1st detection part, a 1st timer part, and a 1st cancellation part. It is a timing chart which shows operation | movement of the direction indicator light system which concerns on Embodiment 5 of this invention. It is a timing chart which shows operation | movement of the direction indicator light system which concerns on Embodiment 5 of this invention.

Embodiment 1 FIG.
FIG. 1 is a functional block diagram showing a state in which the direction indicator lamp system according to Embodiment 1 of the present invention is mounted on a vehicle. With reference to FIG. 1, the light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 of Embodiment 1 will be described focusing on an example applied to a vehicle 1 made of a four-wheeled vehicle.

  The battery 2 is configured by, for example, a lead storage battery or a lithium ion secondary battery mounted on the vehicle 1. The switch 3 opens and closes under the control of an ECU (Electronic Control Unit) (not shown) mounted on the vehicle 1, for example. The battery 2 supplies power to the constant current source 4 when the switch 3 is set to the closed state.

  The battery 2 and the switch 3 are provided on the input side of the constant current source 4. A direction indicator lamp 200 is provided on the output side of the constant current source 4. The constant current source 4 supplies power to the direction indicator lamp 200 using the power supplied from the battery 2. The constant current source 4 has a function of keeping the output current substantially constant by adaptively setting the output voltage with respect to fluctuations in power consumption by the direction indicator lamp 200.

Four light sources 5 _{1 to} 5 ₄ are connected to each other in series with respect to the constant current source 4. Each of the _four light sources 5 _{1 to} 54 is composed of a semiconductor light source, and can be turned on by power supply from the constant current source 4. Hereinafter, four of the light sources 5 ₁ to 5 _4, the light source 5 ₁ connected to the first stage referred to as "first light", a light source 5 ₂ connected to the second-stage "the second light source called "the light source ₃ which is connected to the third stage referred to as" third light source ", the light source 5 ₄ connected to the fourth stage may be referred to as" fourth light source. "

First detector ₆₁ is for detecting the power supply to the first light source 5 ₁ by the constant current source 4. The first timer section _71, when the power supply to the first light source 5 ₁ by the constant current source 4 is started, is intended to light the first light source 5 _1. The first timer section ₇₁ a predetermined time after the power supply to the first light source 5 ₁ by the constant current source 4 is started (hereinafter referred to as "first delay time".) When a Delta] t _D1 has elapsed, it is to start the supply of power by the constant current source 4 to the second light source 5 _2.

Second detector 6 ₂ is for detecting the power supply of the constant current source 4 to the second light source 5 _2. The second timer section 7 _2, when the power supply of the constant current source 4 to the second light source 5 ₂ is started, is intended to light the second light source 5 _2. The second timer section 7 ₂ a predetermined time after the power supply of the constant current source 4 to the second light source 5 ₂ is started (hereinafter referred to as "the second delay time".) When a Delta] t _D2 has elapsed, it is to start the supply of power by the constant current source 4 to the third light source _3.

The third detector 6 ₃ is for detecting the power supply of the constant current source 4 to the third light source _3. Third timer unit 7 _3, when the power supply of the constant current source 4 to the third light source ₃ is started, is intended to light the third light source _3. The third timer unit 7 ₃ a predetermined time after the power supply of the constant current source 4 to the third light source ₃ is started (hereinafter referred to as "third delay time".) When a Delta] t _D3 is elapsed, it is to start the supply of power by the constant current source 4 to the fourth light source 5 _4. Thus, so that the fourth light source 5 ₄ is turned on.

Hereinafter, the first detection unit _61, simply generically second detector 6 ₂ and the third detector 6 ₃ may be referred to as a "detection unit". That is, the detection units 6 _{1 to} 6 ₃ detect power supply to each of the _three light sources 5 _{1 to} 5 ₃ .

The first timer section _71, simply generically second timer section 7, _second and third timer unit 7 ₃ may be referred to as a "timer". The first delay time Δt _D1 , the second delay time Δt _D2 and the third delay time Δt _D3 may be collectively referred to simply as “delay time”. That is, the timer units 7 _{1 to} 7 ₃ illuminate each of the _four light sources 5 _{1 to} 5 ₄ in accordance with the power supply detected by the detection units 6 _{1 to} 6 _3, thereby causing the four light sources 5 _1. 5 ₄ in which sequentially turns on the. The timer unit ₇ 1-7 _3, delay time corresponding to each of the three light sources ₅ 2 _{~5 4 Δt D1 ~Δt D3} is set.

The light source lighting device 100 is configured by the detection units 6 _{1 to} 6 ₃ and the timer units 7 _{1 to} 7 ₃ . The direction indicator lamp 200 is configured by the light source lighting device 100 and the light sources 5 _{1 to} 5 ₄ . The direction indicator lamp system 300 is configured by the direction indicator lamp 200 and the constant current source 4.

  Next, an example of a specific circuit configuration of the constant current source 4 will be described with reference to the circuit diagram of FIG. The constant current source 4 is constituted by, for example, an insulation type DC / DC converter. That is, as shown in FIG. 2, the constant current source 4 has a transformer 11. The primary side of the transformer 11 corresponds to the input side of the constant current source 4, and the secondary side of the transformer 11 corresponds to the output side of the constant current source 4.

  On the primary side of the transformer 11, a step-up or step-down switching element 12 is provided. On the secondary side of the transformer 11, a rectifying diode 13, a smoothing capacitor 14, and a current detection resistor 15 are provided. Further, an inverting amplifier 16 is provided on the secondary side of the transformer 11, and a voltage value corresponding to the voltage between the terminals of the resistor 15 is output to the control unit 17. In FIG. 2, circuit elements other than the operational amplifier (for example, an inverting input resistor) among the circuit elements constituting the inverting amplifier 16 are not shown.

  When receiving the power supply from the battery 2, the control unit 17 opens and closes the switching element 12 by pulse width modulation (PWM) or pulse frequency modulation (PFM), and the transformer 11. The primary voltage is boosted or lowered. The control unit 17 detects the current value of the output current of the constant current source 4 using the voltage value input from the inverting amplifier 16. The control unit 17 executes control to keep the output current of the constant current source 4 substantially constant by adaptively setting the duty ratio in PWM or the switching frequency in PFM with respect to the detected fluctuation of the current value. It is.

  The control unit 17 is configured by a dedicated processing circuit. This processing circuit uses, for example, a microcomputer having a high-speed calculation function. Alternatively, for example, this processing circuit is configured by an error amplification circuit using an operational amplifier. Alternatively, for example, this processing circuit is a combination of a general-purpose microcomputer and an error amplification circuit.

Next, with reference to the circuit diagram in FIG. 3, the first light source 5 _1, an example of a first detector 6 ₁ and the first timer ₇₁ of a specific circuit configuration will be described. As shown in FIG. 3, the first light source _{5 1} is constituted by a single LED 21, the first detection unit ₆₁ is constituted by a single resistor 31. One terminal (hereinafter referred to as “first terminal”) of the resistor 31 is electrically connected to the anode terminal of the LED 21.

  A first switching element 41 is provided between the cathode terminal of the LED 21 and electrical ground (hereinafter referred to as “ground”). The first switching element 41 is composed of an N-channel field effect transistor (FET), the drain terminal of the first switching element 41 is electrically connected to the cathode terminal of the LED 21, and the first The source terminal of the switching element 41 is electrically connected to the ground. The gate terminal of the first switching element 41 is electrically connected to the other terminal of the resistor 31 (hereinafter referred to as “second terminal”).

  A second switching element 42 is provided between the gate terminal of the first switching element 41 and the ground. The second switching element 42 is composed of an NPN-type bipolar transistor, the collector terminal of the second switching element 42 is electrically connected to the second terminal of the resistor 31 and the gate terminal of the first switching element 41, and The emitter terminal of the second switching element 42 is electrically connected to the ground.

  A first resistor 43 and a second resistor 44 for voltage division are connected in series between the first terminal of the resistor 31 and the ground. One electrode (hereinafter referred to as “first electrode”) of the capacitor 45 is electrically connected to a connection portion (hereinafter referred to as “voltage dividing portion”) between the first resistor 43 and the second resistor 44. The other electrode of the capacitor 45 is electrically connected to the ground. The voltage divider and the first electrode of the capacitor 45 are electrically connected to the base terminal of the second switching element 42.

An RC circuit 46 is configured by the first resistor 43, the second resistor 44, and the capacitor 45. The first switching element 41, the second switching element 42 and the RC circuit 46, the first timer portion ₇₁ is formed.

By using the first detector 6 resistor 31 to _1, it is possible to realize the first detector 6 ₁ by a simple circuit structure. Further, by using the FET to the first switching element 41, it is possible to reduce the power consumption in the first timer section _71.

Since the second light source 5 _2, a specific circuit configuration of the second detector 6 ₂ and the second timer section 7 ₂ are the same as those shown in FIG. 3, not shown and described. That is, the second light source _{5 2} is constituted by the first light source _{5 1} similar LED 21. Second detector 6 ₂ is constituted by the first detector 6 ₁ similar resistor 31. The second timer section _{7 2} is constituted by the first first switching element 41 similar to the timer unit _71, the second switching element 42 and the RC circuit 46.

Since the third light source _3, a third detector 6 ₃ and the third specific circuit configuration of the timer unit 7 ₃ are the same as those shown in FIG. 3, not shown and described. That is, the third light source ₃ is constituted by a first light source _{5 1} similar LED 21. The third detector 6 ₃ is constituted by the same resistor 31 and the first detector 6 _1. Third timer unit _{7 3} is constituted by a first first switching element 41 similar to the timer unit _71, the second switching element 42 and the RC circuit 46.

Since the circuit configuration of the fourth light source 5 ₄ is similar to that shown in FIG. 3, not shown and described. That is, the fourth light source _{5 4} is constituted by the first light source _{5 1} similar LED 21.

Here, the first delay time Delta] t _D1 has a value corresponding to the time constant of the first timer ₇ RC circuit 46 in _one. The second delay time Delta] t _D2 is a value corresponding to the time constant of the second timer section _{7 2} of the RC circuit 46. The third delay time Delta] t _D3 has a value corresponding to the time constant of the RC circuit 46 in the third timer unit _{7 3.} The time constant of the RC circuit 46 is represented by the product of the value of the combined impedance of the first resistor 43 and the second resistor 44 and the value of the capacitance of the capacitor 45. Therefore, the resistance value of the first resistor 43 in each of the timer unit ₇ 1-7 _3, the resistance value of the second resistor 44, and in accordance with the capacitance value of the capacitor 45, the corresponding delay time Δt _D1 ~Δt _D3 Can be set to any value.

Next, the operation of the direction indicator lamp system 300 will be described with reference to the timing chart of FIG. In the example shown in FIG. 4, the first delay time Δt _D1 , the second delay time Δt _D2 , and the third delay time Δt _D3 are set to be equal to each other. That is, the time constant of the RC circuit 46 in the first timer section _71, and the time constant of the second timer section _{7 2} of the RC circuit 46, and the time constant of the RC circuit 46 in the third timer unit _{7 3} equivalent to each other Is set to a value.

At time t _0, the switch 3 is opened, the power supply from the battery 2 to the constant current source 4 is stopped. For this reason, the constant current source 4 does not output current, and power supply from the constant current source 4 to the direction indicator lamp 200 is also stopped. In each of the timer units 7 _{1 to} 7 ₃ , the first switching element 41 is in an open state, and in each case, the second switching element 42 is in an open state. Light source ₅ 1 to 5 ₄ are both no current flows through the LED 21, is off.

At time t _1, the switch 3 is switched from the open state to the closed state, the power supply from the battery 2 to the constant current source 4 is started. Thus, the constant current source 4 is started the output current, the anode potential of the 1 LED 21 in the light source 5 ₁ rises. First detector ₆₁ of the resistor 31, detects that this by detecting the anode potential, application of current to the first light source 5 ₁ by the constant current source 4, i.e. the power supply is started. First detector ₆₁ of the resistor 31, the second terminal, starts to output the voltage corresponding to the anode potential. At this time, since the first second switching element 42 of the timer unit ₇₁ is open, the output voltage of the resistor 31 is applied to the gate terminal of the first switching element 41. Thus, first the first switching element 41 by the timer ₇₁ is switched from the open state to the closed state, current starts to flow in the first first switching element 41 of the light source _{5 1} LED21 and first timer _{7 1.} As a result, the first light source _{5 1} is turned on.

And from time t ₁ to time t _2, the output current of the first timer 7 RC circuit 46 in _1, that is, the current value of the current applied to the base terminal of the second switching element 42 gradually increases. The rate of increase at this time is a value corresponding to the time constant of the RC circuit 46. At time t _2, the first second switching element 42 by the timer ₇₁ is switched from the open state to the closed state. That is, the time from time _{t 1} to time _{t 2} corresponds to the first delay time Delta] t _D1. By first second switching element 42 by the timer ₇₁ is switched to the closed state, the voltage applied to the gate terminal of the first switching element 41 is stopped, the first switching element 41 is switched from a closed state to an open state . First the first switching element 41 by the timer ₇₁ is by switching from the closed state to the open state, application of current by the constant current source 4 to the second light source 5 ₂ is started.

By application of current by the constant current source 4 to the second light source 5 ₂ is started, the anode potential of the LED21 of the second light source 5 ₂ rises. Resistor 31 of the second detector 6 ₂ detects that this by detecting the anode potential, application of current by the constant current source 4 to the second light source 5 _2, i.e. the power supply is started. The second resistor 31 of the detecting section 6 ₂ from the second terminal, starts to output the voltage corresponding to the anode potential. At this time, since the second second switching element 42 by the timer 7 ₂ is open, the output voltage of the resistor 31 is applied to the gate terminal of the first switching element 41. Thus, the second first switching element 41 by the timer _{7 2} switches from the open state to the closed state, current starts to flow through the second first switching element 41 of the light source _{5 2} LED21 and the second timer section _{7 2.} As a result, the second light source _{5 2} is turned.

And from time t ₂ to time t _3, the output current of the second timer section 7 ₂ of the RC circuit 46, i.e., the current value of the current applied to the base terminal of the second switching element 42 gradually increases. The rate of increase at this time is a value corresponding to the time constant of the RC circuit 46. At time t _3, the second second switching element 42 by the timer 7 ₂ is switched from the open state to the closed state. That is, the time from time _{t 2} to time _{t 3} corresponds to the second delay time Delta] t _D2. By the second second switching element 42 by the timer 7 ₂ is switched to the closed state, the voltage applied to the gate terminal of the first switching element 41 is stopped, the first switching element 41 is switched from a closed state to an open state . The first switching element 41 of the second timer section 7 ₂ by switching from a closed state to an open state, application of current by the constant current source 4 to the third light source ₃ is started.

By application of current by the constant current source 4 to the third light source ₃ is started, the anode potential of the LED21 of the third light source ₃ is increased. Resistor 31 of the third detector 6 ₃ detects that this by detecting the anode potential, application of current by the constant current source 4 to the third light source _3, i.e. the power supply is started. Resistor 31 of the third detector 6 _3, from the second terminal, starts to output the voltage corresponding to the anode potential. At this time, since the second switching element 42 of the third timer unit 7 ₃ is open, the output voltage of the resistor 31 is applied to the gate terminal of the first switching element 41. Thus, the first switching element 41 of the third timer unit _{7 3} switches from the open state to the closed state, so that the current in the first switching element 41 of the third light source ₃ of the LED21 and the third timer _{7 3} flows Become. As a result, the third light source ₃ is turned on.

And from time t ₃ to time t _4, the output current of the RC circuit 46 in the third timer unit 7 _3, that is, the current value of the current applied to the base terminal of the second switching element 42 gradually increases. The rate of increase at this time is a value corresponding to the time constant of the RC circuit 46. At time t _4, switch to the closed state the second switching element 42 of the third timer unit 7 ₃ from the open state. That is, the time from time _{t 3} to time _{t 4} corresponds to the third delay time Delta] t _D3. By the second switching element 42 of the third timer unit 7 ₃ is switched to the closed state, the voltage applied to the gate terminal of the first switching element 41 is stopped, the first switching element 41 is switched from a closed state to an open state . The first switching element 41 of the third timer unit 7 ₃ by switching from a closed state to an open state, application of current by the constant current source 4 to the fourth light source 5 ₄ is started. As a result, the fourth light source _{5 4} is turned on.

After the fourth light source 5 ₄ is turned at time t _4, at time t ₅ to the switch 3 is switched from a closed state to an open state, all the light sources 5 ₁ to 5 ₄ to maintain the lighting state.

At time t _5, the switch 3 is switched from a closed state to an open state, the power supply from the battery 2 to the constant current source 4 is stopped. Thus, the current output of the constant current source 4 is also stopped, all the light sources 5 ₁ to 5 ₄ are turned off. Further, the output current of the RC circuit 46 in each of the timer units 7 _{1 to} 7 ₃ , that is, the current value of the current applied to the base terminal of the second switching element 42 starts to decrease, and each of the timer units 7 _{1 to} 7 ₃ The second switching element 42 is switched from the closed state to the open state. The current value gradually decreases over time Δt _D1 ′ to Δt _D3 ′ corresponding to the delay times Δt _{D1 to} Δt _D3 , and becomes zero at time t ₆ .

Here, since the four light sources 5 _{1 to} 5 ₄ are connected to each other in series, the anode potential of the LED 21 in each of the light sources 5 _{1 to} 5 ₄ is the light source connected to the rear stage of the own light source and the own light source. Of these, the value is in accordance with the number of light sources that are lit. That is, when the four light sources 5 _{1 to} 5 ₄ are sequentially turned on, the anode potential of the LED 21 in each of the light sources 5 _{1 to} 5 ₄ rises stepwise as shown in FIG.

  The specific circuit configuration of the constant current source 4 is not limited to the example shown in FIG. The constant current source 4 may have any circuit configuration as long as it has a function of keeping the output current substantially constant by adaptively setting the output voltage according to the variation in power consumption by the direction indicator lamp 200. There may be.

The light sources 5 _{1 to} 5 ₄ may be any one that uses a semiconductor light source, and is not limited to the circuit configuration using one LED 21 as shown in FIG. For example, each of the light sources 5 _{1 to} 5 ₄ may be configured by a plurality of LEDs. Alternatively, each of the light sources 5 _{1 to} 5 ₄ may be configured by one or a plurality of laser diodes (Laser Diodes, LD).

Further, the detection units 6 _{1 to} 6 ₃ only need to detect power supply to each of the _three light sources 5 _{1 to} 5 ₃ and are not limited to the circuit configuration shown in FIG.

In addition, the timer units 7 _{1 to} 7 ₃ may be configured to sequentially turn on the _four light sources 5 _{1 to} 5 ₄ by turning on each of the _four light sources 5 _{1 to} 5 ₄ according to power supply. The circuit configuration is not limited to that shown in FIG. For example, the timer units 7 _{1 to} 7 ₃ have a circuit configuration in which a Zener diode is provided instead of the first resistor 43 shown in FIG. 3 and a resistor is added between the voltage dividing unit and the first electrode of the capacitor 45. It may be. In this case, the delay times Δt _{D1 to} Δt _D3 are values corresponding to the Zener voltage of the Zener diode. However, the circuit configuration using the RC circuit 46 shown in FIG. 3 is more preferable because it can be realized at a lower cost than the circuit configuration using the Zener diode.

Further, the number of light sources 5 _{1 to} 5 ₄ is not limited to _{four, and} the number of detection units 6 _{1 to} 6 ₃ and timer units 7 _{1 to} 7 ₃ is not limited to three. The direction indicator lamp 200 only needs to have n (n is an integer of 2 or more) light sources, and the light source lighting device 100 has n−1 light sources excluding one light source connected to the last stage. And n-1 detection units and timer units corresponding to each other.

  Further, the vehicular lamp using the light source lighting device 100 is not limited to the direction indicator lamp 200. The light source lighting device 100 can be used for a vehicular lamp for any application as long as it is compatible with chain lighting.

As described above, the light source lighting device 100 according to the first embodiment are connected in series to each other with respect to the constant current source 4 and the light source 5 _1-5 freely turned on by the power supply from the constant current source 4 ₄ is a light source lighting device 100 for use in a vehicular lamp, and includes detection units 6 _{1 to} 6 ₃ that detect power supply to the light sources 5 _{1 to} 5 ₃ and power sources detected by the detection units 6 _{1 to} 6 _3. by turning on the light source ₅ 1 to 5 ₄ in accordance with the supply, and a timer unit ₇ 1-7 ₃ for sequentially lighting the light source ₅ 1 to 5 _4. Thereby, chain lighting can be realized with a simple structure using one power source (constant current source 4). Further, a constant current circuit such as a current sink shown in FIG. 4 of Patent Document 1 is not necessary, and power consumption by the light source lighting device 100 can be reduced.

Also, directional light 200 of the first embodiment are connected in series to each other with respect to the constant current source 4, and a freely source 5 ₁ to 5 ₄ turned on by the power supply from the constant current source 4, a detection unit ₆₁ through ₃ for detecting the power supply to the light source ₅ 1 to 5 _3, by lighting the light source ₅ 1 to 5 ₄ depending on the power supply detected by the detecting unit ₆₁ through _3, the light source 5 and a light source lighting device 100 with _{1-5 4} timer unit ₇ 1-7 ₃ sequentially lighting the. Thereby, the effect similar to the said light source lighting device 100 can be acquired.

In addition, the direction indicator lamp system 300 of the first embodiment is connected to the constant current source 4 and the constant current source 4 in series with each other, and can be turned on by power supply from the constant current source 4. 5 and _{1-5 4,} the light source ₅ 1 to 5 and the detection unit ₆₁ through ₃ for detecting the power supply to _3, the detection unit ₆ first light source ₅ 1 to 5 ₄ depending on the power supply detected by the 6 ₃ by turning on the, and a light source lighting device 100 and a timer unit ₇ 1-7 ₃ for sequentially lighting the light source ₅ 1 to 5 _4. Thereby, the effect similar to the said light source lighting device 100 can be acquired.

Embodiment 2. FIG.
FIG. 5 is a functional block diagram showing a state in which the direction indicating lamp system according to Embodiment 2 of the present invention is mounted on a vehicle. FIG. 6 is a circuit diagram showing the main parts of the first light source, the first detection unit, and the first timer unit according to Embodiment 2 of the present invention. FIG. 7 is a circuit diagram showing a main part of the constant voltage source according to the second embodiment of the present invention. The light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 according to the second embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same block, circuit element, etc. as the light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 of Embodiment 1 shown in FIGS. 1-3, and description is abbreviate | omitted.

As shown in FIG. 5, the light source lighting device 100 has a constant voltage source 8. As shown in FIG. 6, the emitter terminal of the second switching element 42 in the first timer section ₇₁ is electrically connected to a constant voltage source 8. Likewise, the emitter terminal of the second switching element 42 in the second timer section 7 ₂ (not shown) is electrically connected to a constant voltage source 8, the second switching element 42 in the third timer unit 7 ₃ (not (Shown) is electrically connected to the constant voltage source 8.

  As shown in FIG. 7, the constant voltage source 8 includes a first switching element 51 and a second switching element 52. The first switching element 51 is composed of a PNP-type bipolar transistor, and the emitter terminal of the first switching element 51 is electrically connected to the constant current source 4. The second switching element 52 is composed of an NPN bipolar transistor, and the collector terminal of the second switching element 52 is electrically connected to the base terminal of the first switching element 51.

  A first resistor 53 is provided between the collector terminal of the first switching element 51 and the base terminal of the second switching element 52. A second resistor 54 is provided between the base terminal of the second switching element 52 and the emitter terminal of the second switching element 52. A Zener diode 55 is provided between the emitter terminal of the second switching element 52 and the collector terminal of the first switching element 51. The first switching element 51, the second switching element 52, the first resistor 53, the second resistor 54, and the Zener diode 55 constitute a constant current source unit 56.

The constant voltage source 8 includes a third resistor 57 and a third switching element 58 formed of an NPN type bipolar transistor. The constant current source unit 56 outputs a constant current to the base terminals of the third resistor 57 and the third switching element 58. The collector terminal of the third switching element 58 is electrically connected to the constant current source 4 and the emitter terminal of the first switching element 51. The emitter terminal of the third switching element 58 is electrically connected to the emitter terminal of the second switching element 42 in each of the timer units 7 _{1 to} 7 ₃ .

  The current value of the output current of the constant current source unit 56 is a value obtained by dividing the difference value between the Zener voltage of the Zener diode 55 and the base-emitter voltage of the second switching element 52 by the resistance value of the first resistor 53. . Since the base current of the third switching element 58 is very small, most of the output current of the constant current source unit 56 flows to the third resistor 57. Therefore, the base potential of the third switching element 58 becomes a value corresponding to the product of the current value of the output current of the constant current source unit 56 and the resistance value of the third resistor 57. The voltage output from the emitter terminal of the third switching element 58, that is, the output voltage of the constant voltage source 8 is a value obtained by subtracting the base-emitter voltage of the third switching element 58 from the base potential of the third switching element 58. .

The emitter potential of the second switching element 42 in each of the timer units 7 _{1 to} 7 ₃ has a value corresponding to the output voltage of the constant voltage source 8. Therefore, the delay times Δt _{D1 to} Δt _D3 in each of the timer units 7 _{1 to} 7 ₃ are values corresponding to the time constant of the RC circuit 46 and the output voltage of the constant voltage source 8. Therefore, the light source lighting device 100 according to the second embodiment sets the delay times Δt _{D1 to} Δt _D3 more precisely than the light source lighting device 100 according to the first embodiment, or the delay times Δt _{D1 to} Δt that can be set. The maximum value of _D3 can be set to a different value.

  In addition, the direction indicator lamp system 300 of Embodiment 2 uses two power supplies (the constant current source 4 and the constant voltage source 8) as described above. However, the constant voltage source 8 does not need to change the output voltage, and can be realized with a simple circuit configuration as shown in FIG. Therefore, the structure of the power supply can be simplified with respect to a system using two power supplies with variable output voltages as shown in FIG.

Embodiment 3 FIG.
FIG. 8 is a functional block diagram showing a state in which the direction indicator lamp system according to Embodiment 3 of the present invention is mounted on a vehicle. FIG. 9 is a circuit diagram showing the main parts of the first light source, the first detection unit, and the first timer unit according to Embodiment 3 of the present invention. With reference to FIG.8 and FIG.9, the light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 of Embodiment 3 are demonstrated. In addition, the same code | symbol is attached | subjected to the same block, circuit element, etc. as the light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 of Embodiment 1 shown in FIGS. 1-3, and description is abbreviate | omitted.

The first timer section ₇₁ includes a third resistor 47 and the fourth resistor 48. The third resistor 47 is provided between the anode terminal of the LED 21 and the base terminal of the second switching element 42, that is, between the first terminal of the resistor 31 and the base terminal of the second switching element 42. The fourth resistor 48 is provided between the RC circuit 46 and the base terminal of the second switching element 42. The second timer section 7 ₂ has the same third resistor 47 and the fourth resistor 48 (both not shown) ₁ and the first timer 7. Third timer unit 7 ₃ has the same third resistor 47 and the fourth resistor 48 (both not shown) ₁ and the first timer 7.

With the circuit configuration shown in FIG. 9, the second switching element 42 has a so-called “hysteresis characteristic” with respect to the anode potential of the LED 21. That is, as described in Embodiment 1, the anode potential of the LED21 in each of the light sources 5 ₁ to 5 ₃ changes according to the lighting state of the light source connected to the subsequent stage than its own light source and its own light source. In the circuit shown in FIG. 9, when the second switching element 42 switches from the open state to the closed state, the current value of the current applied to the base terminal of the second switching element 42 oscillates with the change in the anode potential of the LED 21. There is a case. At this time, even if the current value oscillates, positive feedback is applied to the second switching element 42, so that the second switching element 42 can be prevented from returning from the closed state to the open state.

  Similarly, when the second switching element 42 switches from the closed state to the open state, the current value of the current applied to the base terminal of the second switching element 42 may oscillate as the anode potential of the LED 21 changes. At this time, even if the current value oscillates, positive feedback is applied to the second switching element 42, so that the second switching element 42 can be prevented from returning from the open state to the closed state.

  Note that the light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 of the third embodiment can employ various modifications similar to those described in the first and second embodiments. For example, the light source lighting device 100 may have a constant voltage source similar to the constant voltage source 8 according to the second embodiment.

As described above, in the light source lighting device 100 of Embodiment 3, the second switching elements 42 provided in the timer units 7 _{1 to} 7 ₃ have hysteresis characteristics. Thereby, the opening / closing operation | movement of the 2nd switching element 42 can be made more reliable.

Embodiment 4 FIG.
FIG. 10 is a functional block diagram showing a state in which the direction indicator lamp system according to Embodiment 4 of the present invention is mounted on a vehicle. FIG. 11 is a circuit diagram showing a main part of a constant current source according to Embodiment 4 of the present invention. FIG. 12 is a circuit diagram illustrating main parts of the first light source, the first detection unit, the first timer unit, and the first reset unit according to the fourth embodiment of the present invention. The light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 of the fourth embodiment will be described with reference to FIGS. In addition, the same code | symbol is attached | subjected to the same block, circuit element, etc. as the light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 of Embodiment 1 shown in FIGS. 1-3, and description is abbreviate | omitted.

When a predetermined time (hereinafter referred to as “reset time”) Δt _R elapses after the current output from the constant current source 4 is stopped, the control unit 17 performs a predetermined signal (hereinafter referred to as “reset signal”) S _R. It has a function to output. Reset time Delta] t _R is the time corresponding to the delay time _{Δt D1 ~Δt D3 Δt D1 '~Δt} D3' shorter than, i.e., all of the light sources ₅ 1 to 5 ₄ the output current of the RC circuit 46 from off The time is set to be shorter than the time required for the current value to decrease. Reset signal _{S R,} the first reset unit _{9 1} provided on the light source lighting device 100 is input to each of the second reset unit _{9, second} and third reset unit _{9 3.}

The first reset unit 9 _1, when the reset signal S _R is input, is to reset the first delay time Delta] t _D1 next for lighting in the first timer section _71. The second reset unit 9 _2, when the reset signal S _R is input, is to reset the second delay time Delta] t _D2 next for lighting in the second timer section 7 _2. The third reset unit 9 _3, when the reset signal S _R is input, is to reset the third delay time Delta] t _D3 of next for lighting in the third timer unit 7 _3.

Hereinafter, the first reset unit 9 _1, simply generically second reset unit 9, _second and third reset unit 9 ₃ may be referred to as a "reset unit". That is, the reset units 9 _{1 to} 9 ₃ reset all the delay times Δt _{D1 to} Δt _D3 in the timer units 7 _{1 to} 7 ₃ when all the light sources 5 _{1 to} 5 ₄ are turned off.

Here, with reference to the circuit diagram in FIG. 12, an example of a first reset unit 9 ₁ of a specific circuit configuration. As shown in FIG. 12, the first reset unit _{9 1} includes a switching element 61. The switching element 61 is composed of an NPN bipolar transistor. The collector terminal of the switching element 61 is the voltage divider electrically connected to the first timer 7 ₁ of the RC circuit 46. The emitter terminal of the switching element 61 is electrically connected to the ground.

One terminal of the first resistor 62 is electrically connected to the base terminal of the switching element 61. The other terminal of the first resistor 62 is for accepting an input of a reset signal S _R. One terminal of the second resistor 63 is connected to the base terminal of the switching element 61. The other terminal of the second resistor 63 is electrically connected to the ground. That is, the first resistor 62 and second resistor 63 is a resistor voltage dividing, and converts the voltage value of the reset signal S _R to the voltage value for input to the base terminal of the switching element 61. Switching element 61, the first resistor 62 and second resistor 63, first reset unit _{9 1} is formed.

Specific circuit configuration of the second reset unit 9 ₂ are the same as those shown in FIG. 12, not shown and described. That is, the second reset unit _{9 2,} first reset unit _{9 1} similar switching element 61 is constituted by a first resistor 62 and second resistor 63.

Specific circuit configuration of the third reset unit 9 ₃ are the same as those shown in FIG. 12, not shown and described. That is, the third reset unit _{9 3,} first reset unit _{9 1} similar switching element 61 is constituted by a first resistor 62 and second resistor 63.

Next, with reference to the timing chart of FIG. 13, the operation of the direction indicator lamp system 300 will be described focusing on the operation of resetting the delay times Δt _{D1 to} Δt _D3 . In the example shown in FIG. 13, the first delay time Δt _D1 , the second delay time Δt _D2 , and the third delay time Δt _D3 are set to be equal to each other. The reset time Δt _R is set to approximately half of the time Δt _D1 ′ to Δt _D3 ′ corresponding to the delay times Δt _{D1 to} Δt _D3 .

The operation from time t ₀ to time t ₅ is the same as that described in Embodiment 1 with reference to FIG.

At time t _5, the switch 3 is switched from a closed state to an open state, the power supply from the battery 2 to the constant current source 4 is stopped. Thus, the current output of the constant current source 4 is also stopped, all the light sources 5 ₁ to 5 ₄ are turned off. Further, the output current of the RC circuit 46 in each of the timer units 7 _{1 to} 7 ₃ , that is, the current value of the current applied to the base terminal of the second switching element 42 starts to decrease, and each of the timer units 7 _{1 to} 7 ₃ The second switching element 42 is switched from the closed state to the open state.

When the time from the time _{t 5} corresponds to the reset time Delta] t _R has elapsed (time _t R), the control unit 17 starts the output of the reset signal _{S R.} Thus, the switching element 61 in each of the reset unit 91 _to 93 ₃ is switched from the open state to the closed state. As a result, the output current of the RC circuit 46 in each of the timer units 7 _{1 to} 7 ₃ , that is, the current value of the current applied to the base terminal of the second switching element 42 rapidly decreases to zero.

For example, after the first lighting of the direction indicator lamp 200 from time t ₁ to time t ₅ is finished, the second lighting is started before the decrease in the current value of the output current of the RC circuit 46 is completed. If it is, the delay time Δt _D1 ~Δt _D3 in the second lighting is shorter than the predetermined time, the lighting interval of the light source 5 ₁ to 5 ₄ may deviate from the target value.

On the other hand, in the direction indicating lamp system 300 according to the fourth embodiment, when the lighting of the direction indicating lamp 200 is finished, the reset units 9 _{1 to} 9 ₃ rapidly decrease the current value of the output current of the RC circuit 46. As a result, the delay times Δt _{D1 to} Δt _D3 for the next lighting are reset. That is, it is possible to shorten the time until the next lighting delay times Δt _{D1 to} Δt _D3 are reset after the lighting of the turn signal lamp 200 is completed. Thus, when intermittently lit multiple times directional light 200, can be lighting interval of the light source 5 ₁ to 5 ₄ in the lighting of the second and subsequent times can be inhibited from deviating from the target value. As a result, the operation reliability of the direction indicator lamp 200 can be improved.

In the example shown in FIG. 13, the output of the reset signal S _R is terminated at time t _6, the time to continue the output of the reset signal S _R is any, time t _{R ~} time t ₆ It is not limited to time.

The reset units 9 _{1 to} 9 ₃ may be any units that reset all the delay times Δt _{D1 to} Δt _D3 in the timer units 7 _{1 to} 7 ₃ when all the light sources 5 _{1 to} 5 ₄ are turned off. The circuit configuration is not limited to that shown in FIG.

In addition, the light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 according to the fourth embodiment can employ various modifications similar to those described in the first to third embodiments. For example, the light source lighting device 100 may have a constant voltage source similar to the constant voltage source 8 according to the second embodiment. The timer units 7 _{1 to} 7 ₃ include resistors similar to the third resistor 47 and the fourth resistor 48 according to the third embodiment, and the second switching element 42 has hysteresis characteristics. Also good.

As described above, in the light source lighting device 100 according to the fourth embodiment, the timer units 7 _{1 to} 7 ₃ are set with the delay times Δt _{D1 to} Δt _D3 corresponding to the light sources 5 _{2 to} 5 ₄ . Light source lighting device 100, when all of the light source ₅ 1 to 5 ₄ is turned off, and a reset unit ₉ 1 to 9 ₃ to reset all of the delay time in the timer unit _{7 1 ~7 3 Δt D1 ~Δt D3} . Thereby, when the vehicle lamp such as the direction indicator lamp 200 is intermittently turned on a plurality of times, it is possible to prevent the delay times Δt _{D1 to} Δt _D3 from becoming shorter than the predetermined time in the second and subsequent lighting. it can. As a result, the operational reliability of the vehicular lamp can be improved.

Embodiment 5. FIG.
FIG. 14 is a functional block diagram showing a state in which the direction indicator lamp system according to Embodiment 5 of the present invention is mounted on a vehicle. FIG. 15 is a circuit diagram showing a main part of a constant current source according to Embodiment 5 of the present invention. FIG. 16 is a circuit diagram showing main parts of the first light source, the first detection unit, the first timer unit, and the first cancellation unit according to the fifth embodiment of the present invention. With reference to FIGS. 14-16, the light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 of Embodiment 5 are demonstrated. In addition, the same code | symbol is attached | subjected to the same block, circuit element, etc. as the light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 of Embodiment 1 shown in FIGS. 1-3, and description is abbreviate | omitted.

The ECU (not shown) mounted on the vehicle 1 has a function of instructing the control unit 17 to disable chained lighting, that is, simultaneously turn on all the light sources 5 _{1 to} 5 ₃ in addition to the function of opening and closing the switch 3. doing.

Control unit 17, when instructed to disable the chained lit ECU, a predetermined signal (hereinafter referred to as "cancel signal".) Has the function of outputting the S _C. Cancellation signal _{S C,} the first canceling unit 10 ₁ provided on the light source lighting device 100 is input to each of the second canceling unit 10 ₂ and the third cancel part 10 _3.

The first canceling unit 10 _1, when the cancellation signal S _C is input, setting the first switching element 41 in the first timer section ₇₁ by fixing in the open state, the first delay time Delta] t _D1 zero value To do. The second canceling unit 10 _2, when the cancellation signal S _C is input, setting the first switching element 41 in the second timer section 7 ₂ by fixing to an open state, the second delay time Delta] t _D2 zero value To do. Third canceling unit _103, when the cancellation signal S _C is input, setting the first switching element 41 in the third timer unit 7 ₃ by fixing the open state, in the third delay time Delta] t _D3 zero value To do.

Below, the first canceling unit 10 _1, simply generically second canceling unit 10 ₂ and the third cancel part ₁₀₃ is sometimes referred to as "cancellation section". That is, the canceling unit ₁₀ 1 to 10 _3, upon receiving the input of the cancellation signal _{S C,} it is for setting all the delay time in the timer unit ₇ 1 _{~7 3 Δt D1 ~Δt D3} to zero value.

Here, with reference to the circuit diagram in FIG. 16, illustrating an example of a first canceling unit 10 ₁ of a specific circuit configuration. As shown in FIG. 16, the first canceling unit 10 ₁ includes a switching element 71. The switching element 71 is composed of an NPN bipolar transistor. The collector terminal of the switching element 71 is a second terminal, and electrically connected to a gate terminal of the first first switching element 41 in the timer unit ₇₁ of the resistor 31 in the first detector 6 _1. The emitter terminal of the switching element 71 is electrically connected to the ground.

One terminal of the first resistor 72 is electrically connected to the base terminal of the switching element 71. The other terminal of the first resistor 72 is for accepting an input of the cancel signal S _C. One terminal of the second resistor 73 is connected to the base terminal of the switching element 71. The other terminal of the second resistor 73 is electrically connected to the ground. That is, the first resistor 72 and second resistor 73 is a resistor voltage dividing, and converts the voltage value of the cancellation signal S _C to a voltage value for input to the base terminal of the switching element 71. Switching element 71, the first resistor 72 and second resistor 73, the first canceling unit 10 ₁ is formed.

Specific circuit configuration of the second canceling unit 10 ₂ are the same as those shown in FIG. 16, not shown and described. That is, the second canceling unit 10 _2, the first canceling unit 10 ₁ and the same switching element 71 is constituted by a first resistor 72 and second resistor 73.

Specific circuit configuration of the third canceling unit ₁₀₃ are the same as those shown in FIG. 16, not shown and described. That is, the third cancel part 10 _3, the first canceling unit 10 ₁ and the same switching element 71 is constituted by a first resistor 72 and second resistor 73.

  Next, the operation of the direction indicator lamp system 300 will be described with reference to the timing chart of FIG.

Since the state of the direction indicating lamp system 300 at time t ₀ is the same as that described with reference to FIG. 4 in the first embodiment, the description thereof is omitted.

At time t _C , the ECU instructs the control unit 17 to disable the chain lighting. In response to the instruction, the control unit 17 starts the output of the cancellation signal S _C, switched to the closed state the switching element 71 in each of the canceling unit 10 ₁ to 10 ₃ from the open state. As a result, the first switching element 41 in each of the timer units 7 _{1 to} 7 ₃ is always open regardless of the output voltage of the resistor 31 and the open / closed state of the second switching element 42. That is, while the control unit 17 outputs a cancel signal S _C, all delay time Δt _D1 ~Δt _D3 is in a state of being set to zero value. In this condition, all of the light sources 5 ₁ to 5 _3, substantially can be simultaneously turned in accordance with the start of the current output of the constant current source 4, and substantially simultaneously in response to the stop of the current output of the constant current source 4 Can be turned off.

At time _{t 1,} ECU is switched to the closed state of the switch 3 from the open state. Accordingly, since the power supply from the battery 2 to the constant current source 4 is started, the constant current source 4 is started the output current, all of the light sources 5 ₁ to 5 ₄ are turned on. At this time, each of the anode potential of the light source 5 ₁ to 5 ₄ rises to a value corresponding to the number of light sources connected downstream than the self light source and its own light source. Thereafter, ECU at time _{t 5} is the switch 3 to switch from the closed state to the open state, all the light sources ₅ 1 to 5 ₄ to maintain the lighting state.

At time t _5, ECU will switch the switch 3 from the closed state to the open state, the power supply from the battery 2 to the constant current source 4 is stopped. Thus, the constant current source 4 stops the output of the current, all of the light sources 5 ₁ to 5 ₄ are turned off.

For example, in the vehicle 1 having a so-called “keyless entry” or “smart entry” function, when the direction indicator lamp 200 is used for answer back to unlocking or locking, the lighting of the direction indicator lamp 200 does not indicate the direction. . In such a case, the direction indicating lamp system 300 according to the fifth embodiment disables the chain lighting and turns on all the light sources 5 _{1 to} 5 ₄ substantially simultaneously, thereby realizing lighting suitable for the answer back. be able to.

Incidentally, cancellation unit ₁₀ 1 to 10 _3, upon receiving the input of the cancellation signal _{S C,} as long as to set all of the delay time in the timer unit ₇ 1 _{~7 3 Δt D1 ~Δt D3} zero value The circuit configuration is not limited to that shown in FIG.

In addition, the light source lighting device 100, the direction indicator lamp 200, and the direction indicator lamp system 300 according to the fifth embodiment can employ various modifications similar to those described in the first to fourth embodiments. For example, the light source lighting device 100 may have a constant voltage source similar to the constant voltage source 8 according to the second embodiment. The timer units 7 _{1 to} 7 ₃ include resistors similar to the third resistor 47 and the fourth resistor 48 according to the third embodiment, and the second switching element 42 has hysteresis characteristics. Also good. The control unit 17 has a function of outputting the same reset signal and the reset signal S _R in accordance with the fourth embodiment, the light source lighting device 100 includes a reset unit 9 ₁ to 9 ₃ according to the fourth embodiment It may have a similar reset unit.

As described above, in the light source lighting device 100 of the fifth embodiment, the timer units 7 _{1 to} 7 ₃ are set with the delay times Δt _{D1 to} Δt _D3 corresponding to the light sources 5 _{2 to} 5 ₄ . Light source lighting device 100, upon receiving the input of the cancellation signal _{S C,} comprising a canceling unit ₁₀ 1 to 10 ₃ for setting all the delay time in the timer unit ₇ 1 _{~7 3 Δt D1 ~Δt D3} to zero value. Thus, for example, when the turn signal lamp 200 is used for an answer back, it is possible to temporarily disable the chain lighting and realize the lighting suitable for the answer back.

  In the present invention, within the scope of the invention, any combination of the embodiments, or any modification of any component in each embodiment, or omission of any component in each embodiment is possible. .

1 vehicle, 2 battery, 3 switch, 4 constant current source, 5 ₁ , 5 ₂ , 5 ₃ , 5 ₄ light source, 6 ₁ , 6 ₂ , 6 ₃ detection unit, 7 ₁ , 7 ₂ , 7 ₃ timer unit, 8 Constant voltage source, 9 ₁ , 9 ₂ , 9 ₃ reset unit, 10 ₁ , 10 ₂ , 10 ₃ cancel unit, 11 transformer, 12 switching element, 13 diode, 14 capacitor, 15 resistor, 16 inverting amplifier, 17 control Part, 21 LED, 31 resistor, 41 1st switching element, 42 2nd switching element, 43 1st resistor, 44 2nd resistor, 45 capacitor, 46 RC circuit, 47 3rd resistor, 48 4th resistor 51, first switching element, 52 second switching element, 53 first resistor, 54 second resistor, 55 Zener diode, 56 constant current source, 57 third resistor, 58 third switch , 61 switching element, 62 first resistor, 63 second resistor, 71 switching element, 72 first resistor, 73 second resistor, 100 light source lighting device, 200 direction indicator lamp, 300 direction indicator lamp system .

Claims (8)

A light source lighting device used in a vehicle lamp having a semiconductor light source that is connected in series to a constant current source and that can be turned on by power supply from the constant current source,
A detection unit for detecting the power supply to the semiconductor light source;
A timer unit for sequentially lighting the semiconductor light sources by turning on the semiconductor light sources according to the power supply detected by the detection unit;
A light source lighting device comprising:   The light source lighting device according to claim 1, wherein the switching element provided in the timer unit has a hysteresis characteristic. The timer unit is set with a delay time corresponding to the semiconductor light source,
The light source lighting device according to claim 1, further comprising a reset unit that resets all the delay times in the timer unit when all the semiconductor light sources are turned off. The timer unit is set with a delay time corresponding to the semiconductor light source,
The light source lighting device according to claim 1, further comprising: a cancel unit that sets all the delay times in the timer unit to zero values when an input of a cancel signal is received.   The light source lighting device according to claim 1, wherein the vehicular lamp is a direction indicator lamp.   2. The light source lighting device according to claim 1, wherein the constant current source is operated by power supply from a battery mounted on a vehicle having the vehicle lamp. A semiconductor light source that is connected in series to a constant current source and that can be turned on by power supply from the constant current source, and
A light source comprising: a detection unit that detects the power supply to the semiconductor light source; and a timer unit that sequentially turns on the semiconductor light source by turning on the semiconductor light source according to the power supply detected by the detection unit. A lighting device;
Direction indicator lamp with. A constant current source;
A semiconductor light source that is connected in series to the constant current source and that can be turned on by power supply from the constant current source, and
A light source comprising: a detection unit that detects the power supply to the semiconductor light source; and a timer unit that sequentially turns on the semiconductor light source by turning on the semiconductor light source according to the power supply detected by the detection unit. A lighting device;
Direction indicator light system comprising.

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