JP2009283250A - Lighting device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To commonalize a partial circuit of a lighting device, and achieve downsizing, weight reduction, and cost reduction as the whole device when a discharge lamp and a semiconductor light-emitting element are used as a light source. <P>SOLUTION: In the lighting device, the discharge lamp 6 and an LED 7 are used as the light source, and the lighting device includes a direct current power supply part 1, a DC/DC converter 2, a DC/AC inverter 3, an igniter part 4, a control part 5, a switch part 8, a voltage detection part 9, and a current detection part 10. The output end of the DC/DC converter 2 is parallel-connected to the DC/AC inverter 3 and the switch part 8, an output electric power of the DC/DC converter 2 can be supplied to the DC/AC inverter and supplied to the LED 7 via the switch part 8. The switch part 8 switches over connection of an electric power supply route from the output end of the DC/DC converter 2 to the LED 7. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a lighting device mounted on a vehicle or the like, and more particularly to a lighting device having a discharge lamp and a semiconductor light emitting element as a light source.

  In the lighting of vehicles such as automobiles, semiconductor light emitting elements such as LEDs are used as light sources in addition to halogen lamps and discharge lamps, and interior lights (room lamps), headlamps (headlights), and taillights (rear combination lamps). ), Or daytime running lights (DRL: headlights for improving visibility from oncoming vehicles in the daytime) that are being adopted in Europe.

  As an example of a vehicular lighting device using a semiconductor light emitting element, there is a device that employs an LED for a DRL or the like and a discharge lamp as a main illumination in a headlamp. In such a lighting device, two discharge lamp lighting devices and two LED lighting devices must be prepared separately. As a result, it is necessary to arrange two independent lighting devices in the headlamp.

Patent Document 1 includes a first lamp unit that uses a discharge lamp as a light source and a second lamp unit that uses a semiconductor light emitting element as a light source, and starts lighting the first and second lamp units almost simultaneously. In addition, a vehicular headlamp device is disclosed in which a semiconductor light-emitting element is turned on before the discharge lamp shifts to a steady lighting state to compensate for a shortage of light in a transitional period. Thus, in the lighting device that lights the discharge lamp and the semiconductor light emitting element simultaneously, the first lighting circuit that lights the discharge lamp and the second lighting circuit that lights the semiconductor light emitting element are provided independently. It was.
JP 2006-216251 A, FIGS. 1 and 12

  As described above, in the conventional lighting device, when the discharge lamp and the semiconductor light emitting element are used as the light sources, independent lighting circuits are separately provided for the respective light sources. For this reason, there existed a subject that arrangement | positioning space, a weight, and cost increased for several lighting circuits.

  The present invention has been made in view of the above circumstances. When a discharge lamp and a semiconductor light emitting element are used as a light source, a partial circuit of a lighting device can be shared, and the entire device can be reduced in size, weight, and weight. It aims at providing the lighting device which can implement | achieve cost reduction.

  The present invention is a lighting device that is connected to a discharge lamp and a semiconductor light-emitting element used as a light source, and lights the discharge lamp or the semiconductor light-emitting element with electric power obtained from a DC power supply part. A DC / DC converter that boosts or lowers output power to a required voltage; a DC / AC inverter that converts DC power output from the DC / DC converter into AC power and supplies the AC to the discharge lamp; and the discharge lamp An igniter for generating a high voltage at the start of the power supply, a power supply path to the discharge lamp and a power supply path to the semiconductor light emitting element are connected in parallel to the output of the DC / DC converter, A switch unit for switching a power supply path to these light sources, the DC / DC converter, the DC / AC inverter, and the switch unit Providing a lighting device and a control unit that controls the state.

  Further, the present invention is the above lighting device, wherein the DC / AC inverter and a power supply path to the semiconductor light emitting element are connected in parallel at a subsequent stage of the DC / DC converter, and the switch unit includes: And a switch for turning on / off the connection of the power supply path from the DC / DC converter to the semiconductor light emitting element, and the control unit operates the DC / AC inverter when the discharge lamp is turned on. And the connection of the changeover switch is turned off, and the operation of the DC / AC inverter is stopped and the connection of the changeover switch is turned on when the semiconductor light emitting element is turned on.

  Further, the present invention is the above lighting device, wherein the DC / AC inverter includes a bridge-connected switch, and a power supply path to the discharge lamp is connected to the second stage of the DC / AC inverter. The power supply path to the semiconductor light emitting elements of the system is connected in parallel, and the switch unit turns on and off the connection of the switch of the DC / AC inverter and the power supply path to the semiconductor light emitting elements of the two systems The control unit is configured to control the switch of the DC / AC inverter to be turned on and off when turning on the discharge lamp, and to turn off the connection of the changeover switch, so that the semiconductor light emission When turning on the element, when the connection of the power supply path to the semiconductor light emitting element is always turned on via the switch of the DC / AC inverter Including those on the connection of the changeover switch also.

  Moreover, this invention is said lighting device, Comprising: The said control part includes what performs switching control of the state of the said DC / AC inverter and the said switch part based on the control input signal from the outside.

  Further, the present invention is the above lighting device, wherein the control unit monitors an abnormality on the load side, and controls switching of the states of the DC / AC inverter and the switch unit according to the state on the load side. Includes what to do.

  Moreover, this invention provides an illuminating device provided with the lighting device in any one of the said, the 1st light source containing a discharge lamp, and the 2nd light source containing a semiconductor light-emitting device.

  Moreover, this invention provides a vehicle provided with said illuminating device and the DC power supply part which supplies electric power to the said illuminating device.

  With the above configuration, when lighting a discharge lamp or a semiconductor light emitting element, it becomes possible to share a part of a lighting device including a DC / DC converter, and the entire device can be reduced in size, weight, and cost. Is possible.

  According to the present invention, when a discharge lamp and a semiconductor light emitting element are used as a light source, a partial circuit of the lighting device can be shared, and the lighting device can be reduced in size, weight, and cost as a whole. Can provide.

  In the following embodiments, as an example of a lighting device, a configuration example when used for a headlamp mounted on a vehicle is shown. As the light source, a configuration including an HID (High Intensity Discharge) lamp as a discharge lamp and an LED as a semiconductor light emitting element is illustrated.

  FIG. 1 is a diagram showing a schematic configuration of a lighting device according to an embodiment of the present invention. The lighting device of this embodiment includes a DC power supply unit 1 such as a battery, a DC / DC converter 2, a DC / AC inverter 3, an igniter (IGN) unit 4, a control unit 5, a switch unit 8, a voltage detection unit 9, and a current detection unit. The unit 10 is provided. As a light source, a discharge lamp 6 using an HID lamp and an LED 7 which is a semiconductor light emitting element are provided.

  The DC / DC converter 2 raises or lowers the DC power supply voltage from the DC power supply unit 1 to a necessary voltage. Here, the voltage detector 9 detects the output voltage of the DC / DC converter 2. Further, the current detection unit 10 detects the output current of the DC / DC converter 2. The output terminal of the DC / DC converter 2 is connected in parallel to the DC / AC inverter 3 and the switch unit 8, and the output power of the DC / DC converter 2 can be supplied to the DC / AC inverter, and via the switch unit 8. The LED 7 can be supplied. That is, the power supply path to the discharge lamp 6 and the power supply path to the LED 7 are connected in parallel to the output of the DC / DC converter 2. The switch unit 8 is an LED lighting switching switch, and switches the connection of the power supply path from the output end of the DC / DC converter 2 to the LED 7. Thereby, when the switch of the switch unit 8 is turned on, direct-current power of a predetermined voltage output from the DC / DC converter 2 is applied to the LED 7 and the LED 7 is lit.

  The DC / AC inverter 3 converts the DC power output from the DC / DC converter 2 into AC power. The igniter unit 4 generates a high voltage when the discharge lamp 6 is started. As a result, AC power output from the DC / AC inverter 3 is applied to the discharge lamp 6 via the igniter unit 4, and the discharge lamp 6 is lit. The control unit 5 receives a control input signal MODE from the outside, and performs switching control of the lighting operation of the entire apparatus. At this time, the control unit 5 monitors the load side abnormality based on the detection voltage of the voltage detection unit 9 and the detection current of the current detection unit 10, and controls the DC / DC converter 2, DC / DC converter 2 based on the control input signal MODE. The AC inverter 3 and the switch unit 8 are controlled to turn on the discharge lamp 6 or the LED 7.

  In the configuration of the present embodiment, a circuit configuration in which the DC / DC converter 2 and the control unit 5 are shared for two light sources can be used as compared with the conventional two independent lighting circuits. Therefore, for example, when the discharge lamp 6 is turned on in a dark place and the LED 7 is turned on as a DRL in a bright place, the discharge lamp 6 or the LED 7 can be turned on by using both the DC / DC converter 2 and the control unit 5. Accordingly, the lighting device can be reduced in size and weight.

  Below, some more specific structural examples of this embodiment are shown.

(Embodiment 1)
FIG. 2 is a diagram showing a configuration of the lighting device according to Embodiment 1 of the present invention. In the first embodiment, the DC / AC inverter 3 has a configuration in which switches Q1, Q2, Q3, and Q4 that are semiconductor switches such as FETs are bridge-connected. The switch unit 8 is provided between the DC / DC converter 2 and the DC / AC inverter 3, and is connected in parallel with the DC / AC inverter 3 in the subsequent stage of the DC / DC converter 2. And the switch part 8 has the changeover switch Q5a which consists of a semiconductor switch etc. on one wiring of the two wiring connected from the output terminal of the DC / DC converter 2 to the both ends of LED7. The switches Q1, Q2, Q3, and Q4 of the DC / AC inverter 3 and the changeover switch Q5a of the switch unit 8 are on / off controlled by the control unit 5. Other components are the same as those shown in FIG. 1, and a description thereof is omitted here.

  The control unit 5 confirms the state of the load side in the subsequent stage of the DC / DC converter 2 based on the detection voltage of the voltage detection unit 9 and the detection current of the current detection unit 10, and feeds back such information to the DC / DC converter 2 and The DC / AC inverter 3 is controlled. The control unit 5 switches the operation mode to the HID mode in which the discharge lamp 6 is lit or the LED mode in which the LED 7 is lit based on a control input signal MODE for switching the lighting of the light source input from the outside.

  FIG. 3 is a time chart for explaining the operation in the HID mode in the lighting device of the first embodiment, and FIG. 4 is a time chart for explaining the operation in the LED mode in the lighting device of the first embodiment.

  As shown in FIG. 3, when the control input signal MODE is L (low level), the HID mode is set. In this case, the control unit 5 performs on / off control of the bridge-connected switches Q1, Q2, Q3, and Q4 in the DC / AC inverter 3, and turns on and off so as to form a rectangular wave as output power from the DC / AC inverter 3. Make it work. Moreover, the control part 5 turns off the changeover switch Q5a of the switch part 8, and maintains an OFF state. Thereby, rectangular-wave output power is supplied from the DC / AC inverter 3 to the discharge lamp 6 via the igniter unit 4, and the power supply path from the DC / DC converter 2 to the LED 7 is cut off.

  As shown in FIG. 4, when the control input signal MODE is H (high level), the LED mode is set. In this case, the control unit 5 causes the switches Q1, Q2, Q3, and Q4 in the DC / AC inverter 3 to turn off either the switch Q1 or Q4 and turn off either the switch Q2 or Q3. And the operation of the DC / AC inverter 3 is stopped. Thereby, the power supply path to the igniter unit 4 and the discharge lamp 6 is cut off. Further, the control unit 5 turns on the changeover switch Q5a of the switch unit 8 and connects the power supply path from the DC / DC converter 2 to the LED 7. At this time, the control unit 5 controls the output of the DC / DC converter 2 to the electric power matched to the load of the LED 7 by the detection feedback of the load voltage and the load current by the voltage detection unit 9 and the current detection unit 10.

  According to the first embodiment, the DC / AC inverter and the LED via the switch unit are connected in parallel at the subsequent stage of the DC / DC converter, the switch unit is switched on and off, and the operation of the DC / AC inverter is controlled on and off. Thus, the DC / DC converter 2 and the control unit 5 can be shared for the two light sources of the discharge lamp and the LED. Therefore, when the two light sources are used properly, such as when the discharge lamp is turned on as the main illumination of the headlamp and the LED is turned on as the DRL, the lighting device can be reduced in size and weight.

(Embodiment 2)
FIG. 5 is a diagram showing a configuration of a lighting device according to Embodiment 2 of the present invention. The second embodiment is an example in which the first embodiment shown in FIG. 2 is modified, and the connection configuration of the LED 7 and the switch unit 8 is different. In the subsequent stage of the DC / AC inverter 3, two systems of LEDs 7a and 7b are connected in parallel with the igniter section 4, and one end of the changeover switch Q5b of the switch section 8 is connected to the other end of these LEDs 7a and 7b. . The other end of the changeover switch Q5b is connected to the main circuit in the previous stage of the DC / DC converter 2, and constitutes an LED lighting circuit. The switches Q1, Q2, Q3, and Q4 of the DC / AC inverter 3 and the changeover switch Q5b of the switch unit 8 are on / off controlled by the control unit 5. In this case, the switches Q1, Q2, Q3, and Q4 of the DC / AC inverter 3 serve as a part of the function of the switch unit that switches the power supply path to the LEDs 7a and 7b. Other components are the same as those shown in FIG. 1, and a description thereof is omitted here.

  The control unit 5 confirms the state of the load side in the subsequent stage of the DC / DC converter 2 based on the detection voltage of the voltage detection unit 9 and the detection current of the current detection unit 10, and feeds back such information to the DC / DC converter 2 and The DC / AC inverter 3 is controlled. The control unit 5 switches the operation mode to the HID mode in which the discharge lamp 6 is lit or the LED mode in which the LEDs 7a and 7b are lit based on the control input signal MODE for switching the lighting of the light source input from the outside.

  FIG. 6 is a time chart for explaining the operation of the HID mode in the lighting device of the second embodiment, and FIG. 7 is a time chart for explaining the operation of the LED mode in the lighting device of the second embodiment.

  As shown in FIG. 6, when the control input signal MODE is L (low level), the HID mode is set. In this case, the control unit 5 performs on / off control of the bridge-connected switches Q1, Q2, Q3, and Q4 in the DC / AC inverter 3, and turns on and off so as to form a rectangular wave as output power from the DC / AC inverter 3. Make it work. Moreover, the control part 5 turns off the changeover switch Q5b of the switch part 8, and maintains an OFF state. Thereby, rectangular-wave output power is supplied from the DC / AC inverter 3 to the discharge lamp 6 via the igniter unit 4, and the power supply path from the DC / DC converter 2 to the LEDs 7a and 7b is cut off.

  As shown in FIG. 7, when the control input signal MODE is H (high level), the LED mode is set. In this case, the control unit 5 performs control so that two switches Q1 and Q3 in the DC / AC inverter 3 are turned on and two switches Q2 and Q4 are turned off. Thereby, the power supply path from the DC / AC inverter 3 to the igniter unit 4 and the discharge lamp 6 is interrupted. Further, the control unit 5 turns on the changeover switch Q5b of the switch unit 8, and connects the power supply path from the DC / DC converter 2 to the LEDs 7a and 7b via the switches Q1 and Q3 in the DC / AC inverter 3, respectively. To do. At this time, the control unit 5 controls the output of the DC / DC converter 2 to the electric power matched to the load of the LEDs 7a and 7b by the detection feedback of the load voltage and the load current by the voltage detection unit 9 and the current detection unit 10.

  According to the second embodiment, in addition to the effect of sharing the DC / DC converter 2 and the control unit 5 for the two light sources of the discharge lamp and the LED, the DC / AC inverter 3 is also used as a switch, and two systems are used. LED lighting circuit can be configured.

(Embodiment 3)
FIG. 8 is a diagram showing a configuration of a lighting device according to Embodiment 3 of the present invention. The third embodiment is an example in which the second embodiment shown in FIG. 5 is modified, and the connection configuration of the LED 7 and the switch unit 8 is further different. In the subsequent stage of the DC / AC inverter 3, two systems of LEDs 7a and 7b are connected in parallel with the igniter section 4, and one ends of the changeover switches Q5c and Q5d of the switch section 8 are connected to the other ends of these LEDs 7a and 7b, respectively. Has been. Then, the other ends of the changeover switches Q5c and Q5d are connected to form one path, which is connected to the main circuit in the previous stage of the DC / DC converter 2 and constitutes an LED lighting circuit. The switches Q1, Q2, Q3, and Q4 of the DC / AC inverter 3 and the changeover switches Q5c and Q5d of the switch unit 8 are on / off controlled by the control unit 5. In this case, the switches Q1, Q2, Q3, and Q4 of the DC / AC inverter 3 serve as a part of the function of the switch unit that switches the power supply path to the LEDs 7a and 7b. Other components are the same as those shown in FIG. 1, and the description thereof is omitted here.

  The control unit 5 confirms the state of the load side in the subsequent stage of the DC / DC converter 2 based on the detection voltage of the voltage detection unit 9 and the detection current of the current detection unit 10, and feeds back such information to the DC / DC converter 2 and The DC / AC inverter 3 is controlled. In the third embodiment, the load-side abnormality is monitored, and the HID mode in which the discharge lamp 6 is turned on or the LEDs 7a and 7b are turned on in accordance with the load-side state such as a discharge lamp abnormality rather than an external switching signal. Switch the operation mode to.

  FIG. 9 is a time chart for explaining the operation of the HID mode in the lighting device of the third embodiment, and FIG. 10 is a time chart for explaining the operation of the LED mode in the lighting device of the third embodiment.

  If there is no abnormality on the load side as the operation when the discharge lamp is lit, the HID mode shown in FIG. 9 is set. In this case, the control unit 5 performs on / off control of the bridge-connected switches Q1, Q2, Q3, and Q4 in the DC / AC inverter 3, and turns on and off so as to form a rectangular wave as output power from the DC / AC inverter 3. Make it work. Further, the control unit 5 turns off the changeover switches Q5c and Q5d of the switch unit 8 and maintains the off state. Thereby, rectangular-wave output power is supplied from the DC / AC inverter 3 to the discharge lamp 6 via the igniter unit 4, and the power supply path from the DC / DC converter 2 to the LEDs 7a and 7b is cut off.

  Further, when an abnormality occurs on the load side when the discharge lamp is lit, the LED mode shown in FIG. 10 is set. For example, when the normal voltage range of a normal discharge lamp is set to 40 V to 120 V, the control unit 5 detects a case where the operating voltage is out of this range as an abnormality of the discharge lamp load. In this case, when the control unit 5 monitors the voltage and current at the subsequent stage of the DC / DC converter 2 and detects an abnormality on the load side, the control unit 5 turns on two of the switches Q1 and Q3 in the DC / AC inverter 3. Control to turn off two of Q2 and Q4. Thereby, the power supply path from the DC / AC inverter 3 to the igniter unit 4 and the discharge lamp 6 is interrupted. Further, the control unit 5 turns on the changeover switches Q5c and Q5d of the switch unit 8 and supplies power to the LEDs 7a and 7b from the DC / DC converter 2 via the switches Q1 and Q3 in the DC / AC inverter 3, respectively. Connect. At this time, the control unit 5 controls the output of the DC / DC converter 2 to the electric power matched to the load of the LEDs 7a and 7b by the detection feedback of the load voltage and the load current by the voltage detection unit 9 and the current detection unit 10.

  According to the third embodiment, in addition to the effect of sharing the lighting circuit for the two light sources of the discharge lamp and the LED, the discharge is performed by using the current / voltage monitoring inside the circuit instead of the switching input from the outside. The lighting operation of the light and the LED can be switched. In addition, a lighting device that can turn off the discharge lamp and switch to the LED in the event of an abnormality on the load side can be configured in a compact manner.

  In the configuration of the first embodiment, the control unit 5 can be caused to function similarly to the third embodiment. In this case, the control unit 5 monitors the load side abnormality by the current voltage detection output of the voltage detection unit 9 and the current detection unit 10, and controls the switch unit 8 when the abnormality occurs to switch from the HID mode to the LED mode. Good.

  As described above, in the present embodiment, in a lighting device including two light sources of a discharge lamp and an LED, when it is not necessary to turn on these two light sources at the same time, for example, in a headlamp, the LED is used for DRL or is released. Under usage conditions such as for backup of electric lamps, a DC / AC inverter for discharge lamps and LEDs are connected in parallel at the subsequent stage of the DC / DC converter, and control by switching signals from the outside or control by abnormality monitoring on the load side Based on the above, the connection is switched from the discharge lamp to the LED. Thereby, a partial circuit of the lighting device can be shared, and the entire device including the case and the connector can be downsized.

  In addition, among the circuits of lighting devices, it is possible to share a DC / DC converter unit, a control unit, and a case that occupy a high cost ratio, so that the entire device can be reduced in size, space, weight, and cost. Can do. In addition, since the high-intensity discharge lamp system having the LED backup function can be made compact, the discharge lamp system with the LED backup function can be applied to a one-lamp type motorcycle or the like.

  It should be noted that the present invention is not limited to those shown in the above-described embodiments, and those skilled in the art can also make changes and applications based on the description in the specification and well-known techniques. Yes, included in the scope of protection.

  The present invention has an effect that when a discharge lamp and a semiconductor light emitting element are used as a light source, a partial circuit of a lighting device can be shared, and the entire device can be reduced in size, weight, and cost. However, it is useful as a vehicle lighting device or the like in a vehicle headlamp or the like.

The figure which shows schematic structure of the lighting device which concerns on embodiment of this invention. The figure which shows the structure of the lighting device which concerns on Embodiment 1 of this invention. Time chart for explaining the operation of the HID mode in the lighting device of Embodiment 1 Time chart explaining operation of LED mode in lighting device of embodiment 1 The figure which shows the structure of the lighting device which concerns on Embodiment 2 of this invention. Time chart for explaining the operation of the HID mode in the lighting device of the second embodiment Time chart explaining operation of LED mode in lighting device of embodiment 2 The figure which shows the structure of the lighting device which concerns on Embodiment 3 of this invention. Time chart for explaining the operation of the HID mode in the lighting device of the third embodiment Time chart explaining operation of LED mode in lighting device of embodiment 3

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 DC power supply part 2 DC / DC converter 3 DC / AC inverter 4 Igniter part 5 Control part 6 Discharge lamp (HID lamp)
7 LED
8 Switch section 9 Voltage detection section 10 Current detection section

Claims (7)

A lighting device that is connected to a discharge lamp and a semiconductor light emitting element used as a light source, and that lights the discharge lamp or the semiconductor light emitting element with electric power obtained from a DC power supply unit,
A DC / DC converter for stepping up or down the output power from the direct current power supply unit to a required voltage;
A DC / AC inverter that converts DC power output from the DC / DC converter into AC power and supplies the AC power to the discharge lamp;
An igniter for generating a high voltage when starting the discharge lamp;
The power supply path to the discharge lamp and the power supply path to the semiconductor light emitting element are connected in parallel to the output of the DC / DC converter, and the switch unit switches the power supply path to these light sources. When,
A control unit for controlling the state of the DC / DC converter, the DC / AC inverter, and the switch unit;
A lighting device comprising: The lighting device according to claim 1,
The DC / AC inverter and the power supply path to the semiconductor light emitting element are connected in parallel to the subsequent stage of the DC / DC converter,
The switch unit includes a changeover switch that turns on and off the connection of a power supply path from the DC / DC converter to the semiconductor light emitting element,
The control unit operates the DC / AC inverter when turning on the discharge lamp, turns off the connection of the changeover switch, and stops the operation of the DC / AC inverter when turning on the semiconductor light emitting element. A lighting device that turns on the connection of the changeover switch. The lighting device according to claim 1,
The DC / AC inverter is configured to include a bridge-connected switch, and a power supply path to the discharge lamp and a power supply path to two semiconductor light emitting elements are arranged in parallel at the subsequent stage of the DC / AC inverter. Connected,
The switch unit includes a switch of the DC / AC inverter and a changeover switch for turning on / off connection of a power supply path to the two systems of semiconductor light emitting elements,
The controller controls the DC / AC inverter switch to be turned on and off when the discharge lamp is lit, turns off the connection of the changeover switch, and turns on the semiconductor light emitting element. A lighting device that always turns on the connection of the power supply path to the semiconductor light emitting element via the switch of the inverter and turns on the connection of the changeover switch. The lighting device according to claim 2 or 3,
The said control part is a lighting device which performs switching control of the state of the said DC / AC inverter and the said switch part based on the control input signal from the outside. The lighting device according to claim 2 or 3,
The control unit is a lighting device that performs load-side abnormality monitoring and performs switching control of the state of the DC / AC inverter and the switch unit according to the state on the load side.   An illumination device comprising: the lighting device according to claim 1; a first light source including a discharge lamp; and a second light source including a semiconductor light emitting element.   A vehicle comprising: the lighting device according to claim 6; and a DC power supply unit that supplies electric power to the lighting device.

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