JP2018032607A - Lighting device, illumination control system, illumination apparatus and vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve discrimination accuracy of combination with light source while suppressing the size from increasing.SOLUTION: A control unit detects a voltage of a third terminal, and compares the detected the voltage of the third terminal to a first threshold value and a second threshold value which is lower than the first threshold value. When the voltage of the third terminal is equal to or larger than the first threshold value, the control unit discriminates the type of the light source as a first type. When the voltage of the third terminal is equal to or smaller than the second threshold value, the control unit discriminates the type of the light source as a second type. When the voltage of the third terminal is higher than the second threshold value and smaller than the first threshold value, the control unit determines the type of the light source as indefinite.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a lighting device, a lighting control system, a lighting device, and a vehicle. More specifically, the present invention relates to a lighting device that lights a light source, a lighting control system that includes a plurality of the lighting devices, a lighting device that includes a light source and a lighting device, and a vehicle equipped with the lighting device.

  As a conventional example, a lamp control device for a vehicle described in Patent Document 1 is illustrated. The lamp control device described in Patent Document 1 includes two lighting devices (lamp ECUs) provided corresponding to the left and right headlamps. These two lighting devices include a CAN interface that inputs and outputs a CAN signal, a LIN interface that inputs and outputs a LIN signal, a lighting control unit that lights a light source of a headlamp, a microcomputer, and the like. That is, the two lighting devices have the same configuration. However, the CAN line is electrically connected only to the CAN interface of one of the two lighting devices, and the CAN line is not connected to the CAN interface of the other lighting device. Further, the LIN interfaces of the two lighting devices are electrically connected by the LIN line.

  The microcomputer of each lighting device detects whether the CAN connector of the CAN line is connected to the CAN socket of the CAN interface by turning on / off the contact switch. This contact switch is turned on when the CAN connector is fitted to the CAN socket, and is turned off when the CAN connector is not fitted to the CAN socket. Each lighting device (its microcomputer) determines that it is a master-side lighting device when the contact switch is on, and performs a control operation on the master side. On the other hand, when the contact switch is off, each lighting device (its microcomputer) determines that it is a lighting device on the slave side and performs a control operation on the slave side.

  As described above, in the lamp control device described in Patent Document 1, each of the two lighting devices having the same configuration determines the type of master and slave, and selects the control content according to the determination result. The assembling work of the lighting device to the vehicle can be simplified.

JP 2014-024422 A

  In recent years, a lighting device for variable light distribution control has been widely used, which detects a preceding vehicle or an oncoming vehicle using an in-vehicle camera and makes the light distribution (high beam irradiation pattern) variable according to the presence or absence of the preceding vehicle and the oncoming vehicle. Have been doing. In such a lighting device for variable light distribution control, there is a slight difference between the control content for controlling the lighting of the left headlamp and the control content for controlling the lighting of the right headlamp. For this reason, the lighting device for variable light distribution control determines which of the left headlight and the right headlight is combined, and turns on the control content according to the determination result. It is desirable to control. However, in the configuration in which the mechanical connection state between the CAN socket and the CAN connector is detected by turning on / off the contact switch, like the lighting device in the lamp control device described in Patent Document 1, the type of the headlight of the other party ( It is difficult to discriminate between left and right). For example, when the combination of the off state of the contact switch and the right headlamp corresponds, the CAN socket and the CAN connector cannot be distinguished from each other. On the other hand, when the lighting device uses multiple contact switches to determine the type of the headlight of the other party, a space for arranging the multiple contact switches and a line (electric wire) connecting these contact switches and the microcomputer are required. Thus, there is a possibility of increasing the size of the lighting device.

  An object of the present invention is to provide a lighting device, a lighting control system, a lighting device, and a vehicle capable of improving the accuracy of determination of a combination with a light source while suppressing an increase in size.

  A lighting device according to an aspect of the present invention includes a connection unit that is electrically connected to an external power source, and a power adjustment unit that adjusts power supplied from the external power source to the light source via the connection unit. Yes. The lighting device receives a control signal from an external control device, and controls the power adjustment unit according to the control content included in the received control signal to adjust the power supplied to the light source; It has. The connection unit includes a first terminal electrically connected to a positive electrode of the external power source, a second terminal electrically connected to a negative electrode of the external power source, and the first terminal and the second terminal. And a third terminal that is electrically insulated. The third terminal is configured to be able to apply a voltage having a voltage value corresponding to the type of the light source supplied with power from the power adjustment unit. The control unit detects a voltage of the third terminal, and compares the detected voltage of the third terminal with a first threshold value and a second threshold value lower than the first threshold value. The control unit determines that the type of the light source is the first type when the voltage at the third terminal is equal to or higher than a first threshold value. The controller determines the type of the light source as the second type when the voltage at the third terminal is equal to or lower than a second threshold value. The controller makes the type of the light source indefinite when the voltage at the third terminal is higher than a second threshold value and lower than the first threshold value. The control unit further controls the power adjustment unit with the first control content when the determined type of the light source is the first type. The control unit controls the power adjustment unit with the second control content when the determined type of the light source is the second type. The second control content is at least partially different from the first control content.

  The illumination control system which concerns on 1 aspect of this invention has the 1st lighting device which consists of the said lighting device, and the 2nd lighting device which consists of the said lighting device. The control unit of the first lighting device transmits a communication signal including a determination result of the type of the light source to the second lighting device, and a determination result of the type of the light source in the second lighting device. And a communication signal transmitted from the second lighting device is received. The control unit of the second lighting device transmits a communication signal including a determination result of the type of the light source to the first lighting device, and a determination result of the type of the light source in the first lighting device. And a communication signal transmitted from the first lighting device is received. When the light source type is indefinite, the control unit of the first lighting device estimates the light source type according to the determination result included in the received communication signal. The control unit of the second lighting device estimates the type of the light source according to the determination result included in the received communication signal when the type of the light source is indefinite.

  An illumination device according to one embodiment of the present invention includes the lighting device and a light source that is turned on by the lighting device.

  The vehicle which concerns on 1 aspect of this invention has the said illuminating device or the said illumination control system, and the vehicle body which mounts the said illuminating device or the said illumination control system.

  The lighting device, the lighting control system, the lighting device, and the vehicle of the present invention have an effect that it is possible to improve the discrimination accuracy of the combination with the light source while suppressing an increase in size.

FIG. 1 is a system configuration diagram of a lighting control system according to an embodiment of the present invention. FIG. 2A is an equivalent circuit of the determination circuit in the lighting device according to the embodiment of the present invention. FIG. 2B is an equivalent circuit of the discrimination circuit in the lighting device same as above. FIG. 2C is an equivalent circuit of the discrimination circuit in the lighting device same as above. FIG. 3 is an explanatory diagram of a detection voltage, a first threshold value, and a second threshold value for determining the type of the light source in the lighting device same as above. FIG. 4 is a flowchart for explaining the operation of the illumination control system. FIG. 5 is a side cross-sectional view of a lighting device according to an embodiment of the present invention. FIG. 6 is a cross-sectional plan view of the illumination device. FIG. 7 is a perspective view of a vehicle according to an embodiment of the present invention.

  A lighting device, a lighting control system, a lighting device, and a vehicle according to an embodiment of the present invention will be described in detail with reference to the drawings. The configurations described in the following embodiments are merely examples of the present invention. The present invention is not limited to the following embodiments, and various modifications can be made according to the design and the like as long as they do not depart from the technical idea of the present invention.

  As illustrated in FIG. 1, the lighting device 1 according to the present embodiment includes a connection unit 10, a power adjustment unit (first lighting circuit 11 </ b> H and second lighting circuit 11 </ b> L), and a control unit 12. The lighting control system 5 according to the present embodiment includes two lighting devices 1 (a first lighting device 1A and a second lighting device 1B). Furthermore, the illumination device (headlight) 6 according to the present embodiment includes a lighting device 1 and a light source 3 that is turned on by the lighting device 1.

  The light source 3 includes a first LED module 30 and a second LED module 31. The first LED module 30 includes a series circuit of a plurality (four in the illustrated example) of LEDs (light emitting diodes) 301 to 304. The second LED module 31 includes a series circuit of a plurality (four in the illustrated example) of LEDs 311 to 314. However, the first LED module 30 irradiates a traveling beam for long-distance irradiation (also called a high beam). The second LED module 31 irradiates a passing beam (also referred to as a low beam) that suppresses unjustified glare to the driver of the oncoming vehicle or other road users. The plurality of LEDs 301 to 304 of the first LED module 30 are electrically connected in parallel to the plurality of switch elements 14 (14A to 14D). For example, the switch element 14 (14A) is electrically connected in parallel to the LED 301, and the switch element 14 (14B) is electrically connected in parallel to the LED 302. Further, the switch element 14 (14C) is electrically connected in parallel to the LED 303, and the switch element 14 (14D) is electrically connected in parallel to the LED 304. However, a plurality of LEDs may be electrically connected in parallel to one switch element 14A to 14D. The light source 3 may be a semiconductor light emitting element other than an LED, for example, an organic electroluminescence element or a laser diode. Alternatively, the light source 3 may be an automotive halogen bulb or a discharge bulb.

  The first lighting device 1A and the second lighting device 1B have the same configuration (hardware). In the following description, the two lighting devices 1 are called lighting devices 1 except for the case where the first lighting device 1A and the second lighting device 1B are distinguished.

  The lighting device 1 includes a connection unit 10, a power adjustment unit (first lighting circuit 11H and second lighting circuit 11L), and a control unit 12. The connection unit 10 includes a first terminal 101, a second terminal 102, and a third terminal 103. In addition, the connection unit 10 preferably has a fourth terminal 104 and a fifth terminal 105. The first terminal 101 is electrically connected to the positive electrode of the external power supply 4 via the connection device 7 described later. The second terminal 102 is electrically connected to the negative electrode of the external power supply 4 via the connection device 7. The external power source 4 is, for example, a vehicle battery mounted on a vehicle (the vehicle 8 according to the present embodiment). The external power supply 4 includes a first terminal 40 that is a positive electrode and a second terminal 41 that is a negative electrode. From the first terminal 40 and the second terminal 41, for example, a DC voltage with a rated value of 12 [V] is applied. Output. However, the rated value of the power supply voltage of the external power supply 4 is not limited to 12 [V], and may be 24 [V], for example. In the connection part 10, the third terminal 103 is electrically insulated from the first terminal 101 and the second terminal 102. The fourth terminal 104 and the fifth terminal 105 are electrically connected to the pair of communication lines 20 for performing data communication with the control device 2 mounted on the vehicle 8 via the connection device 7. In addition, the control apparatus 2 plays the role which controls the external illuminating device containing a headlamp (illuminating device 6 which concerns on this embodiment) among the some electronic control units (Electronic Control Unit) mounted in the vehicle 8. FIG. It is an electronic control unit.

  The power adjustment unit includes a first lighting circuit 11 </ b> H that adjusts DC power supplied from the external power supply 4 to the first LED module 30 through the connection unit 10, and an external power supply 4 to the second LED module 31 through the connection unit 10. And a second lighting circuit 11L that adjusts the supplied DC power. For example, the first lighting circuit 11H converts the current supplied from the external power supply 4 to the first LED module 30 to a constant current. For example, the second lighting circuit 11L constants the current supplied from the external power supply 4 to the second LED module 31.

  The control unit 12 preferably includes a microcontroller, an interface for data communication for performing data communication with the control device 2, and the like. The data communication interface is configured to perform data communication (CAN frame transmission / reception) in accordance with, for example, a CAN (controller area network) protocol that is an in-vehicle network standard. The control unit 12 receives the CAN frame transmitted from the control device 2 and acquires the CAN signal included in the CAN frame. The control unit 12 controls the operation of the first lighting circuit 11H and the second lighting circuit 11L according to the control content instructed by the CAN signal, and controls on / off of the plurality of switch elements 14A to 14D. Here, the control device 2 determines the presence / absence of a preceding vehicle and an oncoming vehicle from an image obtained by photographing the front of the vehicle body with an in-vehicle camera, and changes the irradiation range of the traveling beam according to the determination result. For example, when it is determined that there is an oncoming vehicle, the control device 2 preferably narrows the irradiation range of the traveling beam on the oncoming lane side of the right headlamp. However, it is preferable to narrow the irradiation range of the traveling beam on the opposite lane side of the left headlight in a place where the automobile is determined to be right-hand traffic, such as the United States and Europe (excluding the United Kingdom).

  Therefore, when it is determined that there is an oncoming vehicle, the control device 2 stores a CAN signal indicating the determination result in a CAN frame, and broadcasts (multicasts) the CAN frame to the two lighting devices 1 at the same time. The control unit 12 of the right lighting device 1 (second lighting device 1B) acquires a CAN signal (determination result that there is an oncoming vehicle) stored in the received CAN frame. Since the control unit 12B of the second lighting device 1B is a light source in which the light source 3 to be controlled is disposed on the right side of the vehicle body, one or a plurality of switch elements 14 out of the plurality of switch elements 14 are used. (For example, the switch element 14A) is turned on. As a result, among the plurality of LEDs 301 to 304 of the first LED module 30 of the right light source 3B, the LED 301 electrically connected in parallel with the switch element 14A is turned off. Note that the control unit 12A of the first lighting device 1A does not control the switch element 14 because its control target is the left light source 3A. That is, the control units 12A and 12B of the first lighting device 1A and the second lighting device 1B must execute partially different control contents according to the type of the light source 3 to be controlled. . Therefore, each of the two control units 12A and 12B stores the type of the light source 3 to be controlled in a memory provided in the microcontroller (for example, an electrically rewritable nonvolatile semiconductor memory such as a flash memory). It is preferable to keep it. Then, each control unit 12A, 12B reads and executes a control content program corresponding to the type of the light source 3 to be controlled from the memory among the two types of control content programs corresponding to each type of the light source 3. That's fine. In the lighting device 1 of the present embodiment, the type of the light source 3 stored in the memory is information (first type) indicating that the light source 3 is the left light source 3A, and the light source 3 is the right light source 3B. This is information (second type) indicating that it exists. However, the type of light source is not limited to the mounting position (left, right) in the width direction of the vehicle body. For example, the type of the light source may be an attachment position (front or rear) with respect to the full length direction of the vehicle body.

  Here, there is a possibility that the type of the light source 3 stored in the memory does not match the actual type of the light source 3 to be controlled due to a work mistake or the like. Therefore, the control unit 12 (12A, 12B) determines which one of the left light source 3 (3A) and the right light source 3 (3B) is to be controlled, and stores a program of control contents according to the determination result in the memory. It is preferable to read and execute from.

  Therefore, the lighting device 1 preferably includes a determination circuit for causing the control unit 12 to determine the type of the light source 3 to be controlled. This discrimination circuit is preferably composed of, for example, three resistors 16A, 16B, and 16C (see FIG. 1). One end of the first resistor 16 </ b> A is electrically connected to the third terminal 103 of the connection unit 10. The other end of the first resistor 16A is electrically connected to one end of the second resistor 16B and one end of the third resistor 16C. The other end of the second resistor 16B is electrically connected to the ground. The other end of the third resistor 16C is electrically connected to the output terminal of the reference power supply circuit 13. The reference power supply circuit 13 is preferably composed of a constant voltage circuit such as a three-terminal regulator. The reference power supply voltage VDD output from the reference power supply circuit 13 is supplied to the control unit 12 as an operation power supply voltage. The voltage value of the reference power supply voltage VDD is preferably a value (for example, 3.3 [V] or 5 [V]) lower than the rated value (12 [V]) of the power supply voltage of the external power supply 4. . The control unit 12 takes in the voltage at the electrical connection point of the three resistors 16A, 16B, and 16C as the detection voltage Vx.

  Here, before describing the operation of determining the type of the light source 3 by the control unit 12, the configuration of the connection device 7 will be described. The connection device 7 includes a first terminal portion 71, a second terminal portion 72, a third terminal portion 73, and a fourth terminal portion 74. The first terminal unit 71 includes a first communication terminal 711 and a second communication terminal 712. The first communication terminal 711 and the second communication terminal 712 are electrically connected to the control device 2 by a pair of communication lines 20. The second terminal portion 72 has a first power supply terminal 721 and a second power supply terminal 722. The first power supply terminal 721 is electrically connected to the first terminal 40 of the external power supply 4 through the first power supply line 400. The second power supply terminal 722 is electrically connected to the second terminal 41 of the external power supply 4 by the second power supply line 410. The third terminal unit 73 includes a third power terminal 730, a fourth power terminal 731, a third communication terminal 732, a fourth communication terminal 733, and a first dummy terminal 734. The third terminal portion 73 is electrically connected to the connection portion 10 of the lighting device 1 whose control target is the left light source 3A. The third power supply terminal 730 is electrically connected to the first power supply terminal 721 of the second terminal portion 72. The fourth power supply terminal 731 is electrically connected to the second power supply terminal 722 of the second terminal portion 72. The third communication terminal 732 is electrically connected to the first communication terminal 711 of the first terminal portion 71. The fourth communication terminal 733 is electrically connected to the second communication terminal 712 of the first terminal portion 71. The first dummy terminal 734 is electrically connected to the first power supply terminal 721 of the second terminal portion 72. The fourth terminal unit 74 includes a fifth power terminal 740, a sixth power terminal 741, a fifth communication terminal 742, a sixth communication terminal 743, and a second dummy terminal 744. The fourth terminal portion 74 is electrically connected to the connection portion 10 of the lighting device 1 whose control target is the right light source 3B. The fifth power supply terminal 740 is electrically connected to the first power supply terminal 721 of the second terminal portion 72. The sixth power supply terminal 741 is electrically connected to the second power supply terminal 722 of the second terminal portion 72. The fifth communication terminal 742 is electrically connected to the first communication terminal 711 of the first terminal portion 71. The sixth communication terminal 743 is electrically connected to the second communication terminal 712 of the first terminal portion 71. The second dummy terminal 744 is electrically connected to the second power supply terminal 722 of the second terminal portion 72. In FIG. 1, the third terminal portion 73 is electrically connected to the connection portion 10 </ b> A of the first lighting device 1 </ b> A via the first wire harness 75. Furthermore, the fourth terminal portion 74 is electrically connected to the connection portion 10B of the second lighting device 1B via the second wire harness 76.

  The first wire harness 75 includes a first wire 751, a second wire 752, a third wire 753, a fourth wire 754, and a fifth wire 755. The first wire 751 electrically connects the third power supply terminal 730 of the third terminal portion 73 and the first terminal 101 of the connection portion 10A of the first lighting device 1A. The second wire 752 electrically connects the fourth power supply terminal 731 of the third terminal portion 73 and the second terminal 102 of the connection portion 10A of the first lighting device 1A. The third wire 753 electrically connects the third communication terminal 732 of the third terminal portion 73 and the fourth terminal 104 of the connection portion 10A of the first lighting device 1A. The fourth wire 754 electrically connects the fourth communication terminal 733 of the third terminal portion 73 and the fifth terminal 105 of the connection portion 10A of the first lighting device 1A. The fifth wire 755 electrically connects the first dummy terminal 734 of the third terminal portion 73 and the third terminal 103 of the connection portion 10A of the first lighting device 1A. The second wire harness 76 includes a sixth wire 761, a seventh wire 762, an eighth wire 763, a ninth wire 764, and a tenth wire 765. The sixth wire 761 electrically connects the fifth power supply terminal 740 of the fourth terminal portion 74 and the first terminal 101 of the connection portion 10B of the second lighting device 1B. The seventh wire 762 electrically connects the sixth power terminal 741 of the fourth terminal unit 74 and the second terminal 102 of the connection unit 10B of the second lighting device 1B. The eighth wire 763 electrically connects the fifth communication terminal 742 of the fourth terminal unit 74 and the fourth terminal 104 of the connection unit 10B of the second lighting device 1B. The ninth wire 764 electrically connects the sixth communication terminal 743 of the fourth terminal unit 74 and the fifth terminal 105 of the connection unit 10B of the second lighting device 1B. The tenth wire 765 electrically connects the second dummy terminal 744 of the fourth terminal portion 74 and the third terminal 103 of the connection portion 10B of the second lighting device 1B.

  Here, when the connection part 10 of the lighting device 1 is electrically connected to the fourth terminal part 74 of the connection device 7 via the second wire harness 76, the potential of the third terminal 103 of the connection part 10 is This corresponds to the potential (0 [V]) of the negative electrode (second terminal 41) of the external power supply 4. At this time, the determination circuit of the lighting device 1 is represented by an equivalent circuit shown in FIG. 2A. Therefore, the detection voltage Vx (Vx1) at this time is a voltage obtained by dividing the reference power supply voltage VDD by the parallel resistor of the first resistor 16A and the second resistor 16B and the third resistor 16C.

  In addition, when the connection unit 10 of the lighting device 1 is electrically connected to the third terminal unit 73 of the connection device 7 via the first wire harness 75, the potential of the third terminal 103 of the connection unit 10 is external. This coincides with the potential (12 [V]) of the positive electrode (first terminal 40) of the power supply 4. At this time, the determination circuit of the lighting device 1 is represented by an equivalent circuit shown in FIG. 2B. The detection voltage Vx (Vx2) at this time is obtained by using the first resistor 16A and the second resistor 16B to detect the detection voltage Vx1 in the equivalent circuit shown in FIG. A voltage obtained by superimposing (adding) the divided detection voltage is obtained. Therefore, the detection voltage Vx2 is higher than the detection voltage Vx1, and the relationship Vx1 <Vx2 is established.

  On the other hand, when a failure (abnormality) such as disconnection occurs in the fifth wire 755 of the first wire harness 75 or the tenth wire 765 of the second wire harness 76, the potential of the third terminal 103 of the connection unit 10 becomes indefinite. . At this time, the determination circuit of the lighting device 1 is represented by an equivalent circuit shown in FIG. 2C. The detection voltage Vx (Vx3) at this time is a voltage obtained by dividing the reference power supply voltage VDD by the second resistor 16B and the third resistor 16C. Therefore, the detection voltage Vx3 is higher than the detection voltage Vx1 and lower than the detection voltage Vx2, and the relationship Vx1 <Vx3 <Vx2 is established (see FIG. 3).

  Therefore, the control unit 12 in the present embodiment has a first threshold value Vth1 that is higher than the detection voltage Vx3 and lower than the detection voltage Vx2, and higher than the detection voltage Vx1, and higher than the detection voltage Vx3. The second threshold value Vth2 having a lower voltage value is stored in the memory. The control unit 12 compares the detection voltage Vx of the determination circuit with two threshold values (first threshold value Vth1 and second threshold value Vth2). If the detection voltage Vx is equal to or higher than the first threshold value Vth1, the control unit 12 determines that the potential of the third terminal 103 of the connection unit 10 is equal to the power supply voltage of the external power source 4, that is, the connection unit 10 is the first wire harness. It is determined that the connection unit 7 is connected to the third terminal unit 73 of the connection device 7 via 75. In other words, the control unit 12 determines the type of the light source 3 that is its control target as the first type (left light source 3A). Further, if the detection voltage Vx is equal to or lower than the second threshold value Vth2, the control unit 12 determines that the potential of the third terminal 103 of the connection unit 10 is equal to the reference power supply voltage VDD, that is, the connection unit 10 is the second wire harness. It is determined that it is connected to the fourth terminal portion 74 of the wiring device 7 via 76. In other words, the control unit 12 determines the type of the light source 3 that is its control target as the second type (right light source 3B). And if the control part 12 discriminate | determines the classification of the light source 3 which is its control object, what is necessary is just to read the program of the control content according to the discrimination | determination result, and to perform it.

  Here, the control unit 12 determines that the type of the light source 3 is indefinite when the detection voltage Vx is higher than the second threshold value Vth2 and lower than the first threshold value Vth1. When the control unit 12 determines that the type of the light source 3 is indefinite, it is preferable to transmit a CAN frame including a CAN signal for notifying the occurrence of abnormality to the control device 2. When the control device 2 receives a CAN signal for notifying the occurrence of an abnormality from the control unit 12 of the lighting device 1, for example, the control device 2 displays the occurrence of the abnormality on a display element included in the control device 2 and generates the abnormality. It is preferable to encourage coping with

  By the way, in the illumination control system 5 of this embodiment, for example, even if the control unit 12A of the first lighting device 1A cannot determine the type of the light source 3, the control unit 12B of the second lighting device 1B In some cases, the type can be determined. In this case, if the control unit 12A of the first lighting device 1A acquires the discrimination result (for example, the second type) of the type of the light source 3 in the control unit 12B of the second lighting device 1B, The type (first type) can be estimated.

  In addition, each of the control units 12 of the two lighting devices 1 may not be able to determine the type of the light source 3. Therefore, each of the control units 12 of the two lighting devices 1 stores an initial value (first type or second type) of the type of the light source 3 in the memory, and the type of the light source 3 is determined as described above. If it cannot be determined, it is preferable to estimate the initial value stored in the memory as the type of the light source 3. In this way, if the control unit 12 estimates the type of the light source 3 to be controlled, it is possible to avoid a situation where at least the light source 3 is inconspicuous. In addition, the control part 12 is the initial stage of the classification of the light source 3 in any one of the process of manufacturing the illuminating device 6 combining the lighting device 1 with the light source 3, or the process of mounting the illuminating device 6 in a vehicle. The value is preferably stored in memory.

  Here, when the determination result of the type of the light source 3 does not match the initial value (first initial value), the control unit 12 (for example, the control unit 12A of the first lighting device 1A) For example, the control unit 12B of the second lighting device 1B) may be inquired about the determination result of the type of the light source 3. Then, if the determination result of the control unit 12B matches the initial value (second initial value) stored in the memory of the control unit 12B, the control unit 12A determines its own light source 3 from the determination result of the control unit 12B. It is preferable to estimate the type. Thus, if the control part 12 estimates the classification of the light source 3 which is its control object, the precision which discriminate | determines the classification of the light source 3 can be aimed at. However, if the determination result of the control unit 12B does not match the second initial value stored in the memory of the control unit 12B, the control unit 12A uses the first initial value stored in its own memory as the light source 3. It is preferable to estimate the type. In this way, if the control unit 12 estimates the type of the light source 3 to be controlled, it is possible to avoid a situation where at least the light source 3 is inconspicuous.

  Further, when the determination result of the type of the light source 3 does not match the initial value (first initial value) stored in its own memory, the control unit 12A inquires the control unit 12B about the determination result. Preferably it is done. If the determination result of the control unit 12B matches the second initial value (second type), the control unit 12A determines the type (first type) of its own light source 3 from the determination result of the control unit 12B. It may be estimated. Similarly, if the determination result of the type of the light source 3 does not match the initial value (second initial value) stored in its own memory, the control unit 12B inquires the control unit 12A about the determination result. Preferably it is done. If the determination result of the control unit 12A matches the first initial value (first type), the control unit 12B determines the type (second type) of its own light source 3 from the determination result of the control unit 12A. It may be estimated. At this time, the respective control units 12A and 12B may update their initial values (first initial value and second initial value) to the estimated discrimination results. If the control units 12A and 12B estimate the type of the light source 3 as described above, it is possible to improve the accuracy of determining the type of the light source 3.

  Next, operation | movement of the illumination control system 5 of this embodiment is demonstrated in detail. The flowchart shown in FIG. 4 shows the control operation of the control unit 12A of the first lighting device 1A. In addition, the control unit 12A of the first lighting device 1A stores the first type in the memory as the initial value (first initial value) of the type of the light source 3 that is its own control target. Furthermore, the control unit 12B of the second lighting device 1B stores the second type in the memory as the initial value (second initial value) of the type of the light source 3 that is the control target of the second lighting device 1B.

  First, the control unit 12A of the first lighting device 1A determines the type of the light source 3 by comparing the detection voltage Vx input from the determination circuit with the two threshold values Vth1 and Vth2. The control unit 12A determines whether or not the determination result of the type of the light source 3 is indefinite (step S1). If the determination result is not indefinite, whether or not the determination result matches the first initial value stored in the memory. Is determined (step S2). If the determination result matches the first initial value (first type), the control unit 12A determines the type of the light source 3 to be controlled as the first type and ends the determination process. Then, the control unit 12A reads the program of the control content corresponding to the first type (control content for the left light source 3A) from the memory and executes it.

  Further, when the determination result of the type of the light source 3 is indefinite, the control unit 12A inquires of the control unit 12B of the second lighting device 1B about the determination result of the control unit 12B. Specifically, the control unit 12A generates a CAN frame including a CAN signal that requests transmission of the determination result, and transmits the CAN frame to the control unit 12B of the second lighting device 1B via the control device 2. To do. When the control unit 12B receives the CAN signal and receives the CAN signal, the control unit 12B returns a CAN frame having its own determination result as the CAN signal to the control unit 12A of the first lighting device 1A. The control unit 12A determines whether or not the determination result received from the control unit 12B of the second lighting device 1B is indefinite (step S3). If the determination result is not indefinite, the determination result of the control unit 12B (for example, the second determination result) The type of its own light source 3 is estimated from the type) as the first type (step S4). Further, the control unit 12A stores a CAN signal indicating that the determination result of the type of the light source 3 is indefinite (abnormality has occurred) in a CAN frame and transmits the CAN signal. That is, the control unit 12A notifies the control device 2 that an abnormality has occurred (step S5). On the other hand, when the determination result of the control unit 12B of the second lighting device 1B is indefinite, the control unit 12A estimates the type of its own light source 3 as the first initial value (step S6) and performs control. The occurrence of abnormality is notified to the device 2 (step S5). Then, the control unit 12A reads the program of the control content corresponding to the first type (control content for the left light source 3A) from the memory and executes it.

  Furthermore, the control unit 12A controls the control unit 12B of the second lighting device 1B when the discrimination result of the type of the light source 3 does not match the first initial value (first type). An inquiry is made as to whether the determination result of the section 12B matches the second initial value (second type). Based on the response of the control unit 12B to the inquiry, the control unit 12A determines whether the determination result of the control unit 12B matches the second initial value (step S7). Then, when the determination result of the control unit 12B matches the second initial value, the control unit 12A estimates the type of its own light source 3 as the first type from the determination result (second type) of the control unit 12B. (Step S8). Here, there is a possibility that the controller 12A stores not the first type but the second type in the memory as the first initial value. Therefore, it is preferable that the control unit 12A updates the first initial value stored in the memory to the estimated type (first type) in step S8. In addition, when the determination result of the control unit 12B does not match the second initial value, the control unit 12A estimates the type of the light source 3 as the first initial value (step S6), and the control device 2 The occurrence of abnormality is notified (step S5). Then, the control unit 12A reads the program of the control content corresponding to the first type (control content for the left light source 3A) from the memory and executes it. The control operation of the control unit 12B of the second lighting device 1B is common to the control operation of the control unit 12A described above, and thus detailed description thereof is omitted.

  As described above, the lighting device 1 of the present embodiment includes the connection unit 10 that is electrically connected to the external power source 4 and the power adjustment that adjusts the power supplied from the external power source 4 to the light source 3 via the connection unit 10. (First lighting circuit 11H and second lighting circuit 11L). The lighting device 1 receives a control signal (CAN signal) from the external control device 2, and controls the first lighting circuit 11H and the second lighting circuit 11L according to the control content included in the received CAN signal. And a control unit 12 that adjusts the power supplied to the light source 3. The connection unit 10 includes a first terminal 101 that is electrically connected to the positive electrode (first terminal 40) of the external power source 4, and a second terminal that is electrically connected to the negative electrode (second terminal 41) of the external power source 4. 102. The connection unit 10 further includes a third terminal 103 that is electrically insulated from the first terminal 101 and the second terminal 102. The third terminal 103 is configured to be able to apply a voltage having a voltage value corresponding to the type of the light source 3 supplied with power from the first lighting circuit 11H and the second lighting circuit 11L. The control unit 12 detects the voltage of the third terminal 103, and the detected third terminal voltage (detected voltage Vx) is a first threshold value Vth1 and a second threshold value lower than the first threshold value Vth1. Compare with Vth2. The control unit 12 determines that the type of the light source 3 is the first type when the detection voltage Vx is equal to or higher than the first threshold value Vth1, and the light source 3 when the detection voltage Vx is equal to or lower than the second threshold value Vth2. Is determined as the second type. Furthermore, the control unit 12 makes the type of the light source 3 undefined when the detection voltage Vx is higher than the second threshold value Vth2 and lower than the first threshold value Vth1. Further, when the determined type of the light source 3 is the first type, the control unit 12 controls the first lighting circuit 11H and the second lighting circuit 11L with the first control content. When the determined type of the light source 3 is the second type, the control unit 12 controls the first lighting circuit 11H and the second lighting circuit 11L with the second control content. The second control content is at least partially different from the first control content.

  If the lighting device 1 of the present embodiment is configured as described above, it is possible to suppress an increase in size as compared with a configuration in which the type of the light source is determined using a contact switch. In addition, the lighting device 1 according to the present embodiment compares the detection voltage Vx with the two threshold values Vth1 and Vth2, thereby discriminating not only the type of the light source 3 but also the occurrence of an abnormality in which the type of the light source 3 is indefinite. can do. As a result, the lighting device 1 of the present embodiment can improve the discrimination accuracy of the combination with the light source 3 while suppressing an increase in size.

  Moreover, in the lighting device 1 of the present embodiment, the third terminal 103 is preferably configured so that an electric wire (the fifth wire 755 or the tenth wire 765) can be electrically connected. The fifth wire 755 and the tenth wire 765 correspond to the type of the light source 3 supplied with power from the first lighting circuit 11H and the second lighting circuit 11L among the first terminal 40 and the second terminal 41 of the external power supply 4. It is preferable that the terminal is electrically connected.

  If the lighting device 1 of the present embodiment is configured as described above, the detection voltage Vx differs depending on the type of electric wire (the fifth wire 755 and the tenth wire 765) electrically connected to the third terminal 103. . Therefore, the lighting device 1 according to the present embodiment can determine that an abnormality such as a disconnection has occurred in the fifth wire 755 and the tenth wire 765 by comparing the detection voltage Vx with the threshold values Vth1 and Vth2.

  The lighting device 1 of the present embodiment preferably includes a reference power supply circuit 13 that applies a reference voltage (reference power supply voltage VDD) having a voltage value different from the power supply voltage of the external power supply 4 to the third terminal 103.

  If the lighting device 1 of the present embodiment is configured as described above, a voltage between the voltage applied to the third terminal 103 from the outside and the reference power supply voltage VDD applied to the third terminal 103 from the reference power supply circuit 13. The voltage value of the detection voltage Vx can be changed by the difference.

  As described above, the illumination control system 5 of the present embodiment includes the first lighting device 1A and the second lighting device 1B. The control unit 12A of the first lighting device 1A transmits a communication signal (CAN signal) including a determination result of the type of the light source 3 to the second lighting device 1B. The control unit 12A of the first lighting device 1A receives a communication signal (CAN signal) including the determination result of the type of the light source 3 in the second lighting device 1B and transmitted from the second lighting device 1B. The control unit 12B of the second lighting device 1B transmits a communication signal (CAN signal) including a determination result of the type of the light source 3 to the first lighting device 1A. The control unit 12B of the second lighting device 1B receives a communication signal (CAN signal) that includes the determination result of the type of the light source 3 in the first lighting device 1A and is transmitted from the first lighting device 1A. When the type of the light source 3 is indefinite, the control unit 12A of the first lighting device 1A estimates the type of the light source 3 according to the determination result included in the received CAN signal. When the type of the light source 3 is indefinite, the control unit 12B of the second lighting device 1B estimates the type of the light source 3 according to the determination result included in the received CAN signal.

  If the illumination control system 5 of the present embodiment is configured as described above, each of the control unit 12A of the first lighting device 1A and the control unit 12B of the second lighting device 1B determines its own determination result and the partner's determination. The type of the light source 3 is estimated by comparing the results with each other. As a result, the illumination control system 5 of the present embodiment improves the discrimination accuracy of the combination of the light source 3 and the lighting devices 1A and 1B while suppressing the increase in size of the first lighting device 1A and the second lighting device 1B. be able to.

  In the illumination control system 5 of the present embodiment, the control unit 12A of the first lighting device 1A preferably stores the first type or the second type as the first initial value of the type of the light source 3. . When the type of the light source 3 is indefinite and the discrimination result (the discrimination result of the control unit 12B) included in the received CAN signal is indefinite, the control unit 12A sets the type of the light source 3 as the first initial value. It is preferable to estimate. The control unit 12B of the second lighting device 1B preferably stores the first type or the second type as the second initial value of the type of the light source 3. In the case where the type of the light source 3 is indefinite and the determination result included in the received CAN signal (the determination result of the control unit 12A) is indefinite, the control unit 12B sets the type of the light source 3 as the second initial value. It is preferable to estimate.

  If the illumination control system 5 of the present embodiment is configured as described above, if neither of the control units 12A and 12B can determine the type of the light source 3, the first initial value and the second initial value of the light source 3 are determined. If the type is estimated, it is possible to avoid a situation where at least the light source 3 is inconspicuous.

  In the illumination control system 5 of the present embodiment, the control unit 12A of the first lighting device 1A determines the determination result included in the received CAN signal when the determination result of the type of the light source 3 does not match the first initial value. Is not equal to the first initial value, it is preferable to estimate the type of the light source 3 as the first initial value. When the determination result of the type of the light source 3 and the second initial value do not match, the control unit 12B of the second lighting device 1B must match the determination result included in the received CAN signal with the second initial value. For example, it is preferable to estimate the type of the light source 3 as the second initial value.

  If the illumination control system 5 of this embodiment is comprised as mentioned above, each control part 12A, 12B will be the classification of the light source 3 which is its control object based on the discrimination | determination result of the other control part 12B, 12A. The estimation accuracy can be improved by estimating.

  In the illumination control system 5 of the present embodiment, the control unit 12A of the first lighting device 1A determines the determination result included in the received CAN signal when the determination result of the type of the light source 3 does not match the first initial value. Is not equal to the second initial value, it is preferable to estimate the type of the light source 3 as the first initial value. When the determination result of the type of the light source 3 and the second initial value do not match, the control unit 12B of the second lighting device 1B must match the determination result included in the received CAN signal with the first initial value. For example, it is preferable to estimate the type of the light source 3 as the second initial value.

  If the illumination control system 5 of the present embodiment is configured as described above, at least the light source 3 even when the determination results of the respective control units 12A and 12B do not match the first initial value and the second initial value. Can be avoided.

  In the illumination control system 5 of the present embodiment, the control unit 12A of the first lighting device 1A determines the determination result included in the received CAN signal when the determination result of the type of the light source 3 does not match the first initial value. It is preferable to estimate the type of the light source 3 based on the first type or the second type. In addition, it is preferable that the control unit 12A updates the first initial value to the estimated type of the light source 3. The control unit 12B of the second lighting device 1B sets the type of the light source 3 to the first based on the determination result included in the received CAN signal when the determination result of the type of the light source 3 does not match the second initial value. It is preferable to estimate the type or the second type. In addition, it is preferable that the control unit 12B updates the second initial value to the estimated type of the light source 3.

  If the illumination control system 5 of the present embodiment is configured as described above, it is possible to improve the accuracy of determining the type of the light source 3.

  The illumination control system 5 of the present embodiment preferably includes the control device 2 that transmits a control signal (CAN signal) to the first lighting device 1A and the second lighting device 1B. The control unit 12A of the first lighting device 1A may notify the control device 2 of the occurrence of an abnormality when the type of the light source 3 is indefinite and when the determination result does not match the first initial value. preferable. The control unit 12B of the second lighting device 1B may notify the control device 2 of the occurrence of an abnormality when the type of the light source 3 is indefinite and when the determination result does not match the second initial value. preferable.

  If the illumination control system 5 of the present embodiment is configured as described above, for example, the control device 2 can notify the occurrence of an abnormality to prompt the countermeasure against the abnormality that has occurred.

  Next, the structure of the illumination device 6 according to the present embodiment will be described. As shown in FIGS. 5 and 6, the illumination device 6 preferably includes a lighting device 1, four light source units 32 </ b> A to 32 </ b> D, a main body 60, a cover 61 and the like. However, in the illuminating device 6 shown in FIG.5 and FIG.6, the 2nd LED module 31 for passing beams is abbreviate | omitted.

  The main body 60 is formed of a synthetic resin into a box shape having an open front surface. The cover 61 is formed in a box shape whose rear surface is opened by a light-transmitting material such as glass or acrylic resin. The rear end of the cover 61 is coupled to the front end of the main body 60. The four light source units 32 </ b> A to 32 </ b> D are accommodated in the main body 60.

  The four light source units 32A to 32D basically have a common structure. Therefore, representatively, the structure of the third light source unit 32C will be described with reference to FIG. The third light source unit 32C includes the LED 303 of the first LED module 30, a housing 320, a lens 321, a heat radiating member 322, a reflecting member 323, and the like. The LED 303 is configured by mounting an LED chip 3031 on a mounting substrate 3030. The case 320 is formed of a metal material in a box shape and accommodates the LED 303 therein. The lens 321 is formed in a hemispherical shape from a light-transmitting material such as glass or acrylic resin. The lens 321 is attached to the tip of the housing 320. The heat radiating member 322 is formed by, for example, aluminum die casting. The reflecting member 323 is formed in a hemispherical shape with a metal material such as an aluminum plate. The LED 303 is attached to the heat dissipation member 322 so that the mounting substrate 3030 is in contact with the surface of the heat dissipation member 322. The reflection member 323 is attached to the heat dissipation member 322 so that the LED 303 can be housed inside. Therefore, the light emitted from the LED 303 is reflected by the inner peripheral surface of the reflecting member 323 and then collected by the lens 321. In addition, it is preferable that the four light source units 32A to 32D are arranged in a row in the horizontal direction in the main body 60 as shown in FIG.

  The lighting device 1 is accommodated in a metal case 17 and attached to the outer surface of the main body 60. The lighting device 1 and the four light source units 32A to 32D are electrically connected via an electric wire 324 (see FIGS. 5 and 6).

  The vehicle 8 according to the present embodiment is preferably, for example, a sedan type ordinary passenger car (see FIG. 7). The illuminating device 6 according to this embodiment is disposed on both the left and right sides of the front end portion of the vehicle body 80 of the vehicle 8. That is, it is preferable that the illuminating device 6 which concerns on this embodiment is used for the headlamp of the vehicle 8. FIG.

  As described above, the lighting device 6 of the present embodiment includes the lighting device 1 and the light source 3 that is turned on by the lighting device 1.

  If the illuminating device 6 of this embodiment is comprised as mentioned above, the improvement of the discrimination | determination precision of the combination with the light source 3 can be aimed at, suppressing the enlargement similarly to the lighting device 1. FIG.

  As described above, the vehicle 8 of the present embodiment includes the illumination device 6 or the illumination control system 5 of the present embodiment, and the vehicle body 80 on which the illumination device 6 or the illumination control system 5 of the present embodiment is mounted.

  If the vehicle 8 of this embodiment is comprised as mentioned above, improvement of the discrimination | determination precision of the combination with the light source 3 can be aimed at suppressing the enlargement similarly to the lighting device 1 and the illuminating device 6. FIG.

  By the way, the illuminating device 6 is not limited to a headlamp. The illuminating device 6 may be an illuminating device in which light sources are arranged on the left and right sides of the vehicle body 80, and may be a direction indicator (turn signal lamp) or a vehicle width light (clearance lamp), for example.

DESCRIPTION OF SYMBOLS 1 Lighting device 1A 1st lighting device 1B 2nd lighting device 2 Control device 3 Light source 4 External power supply 5 Illumination control system 6 Illumination device 8 Vehicle 10 Connection part 11H 1st lighting circuit (electric power adjustment part)
11L 2nd lighting circuit (power adjustment part)
DESCRIPTION OF SYMBOLS 12 Control part 12A Control part of 1st lighting device 12B Control part of 2nd lighting device 13 Reference power supply circuit 40 1st terminal (positive electrode)
41 Terminal 2 (Negative electrode)
101 1st terminal 102 2nd terminal 103 3rd terminal 755 5th wire (electric wire))
765 10th wire (electric wire)

Claims (11)

A connection unit that is electrically connected to an external power source, a power adjustment unit that adjusts power supplied from the external power source to the light source via the connection unit, and a control signal received from an external control device and received A control unit that controls the power adjustment unit according to the control content included in the control signal to adjust the power supplied to the light source,
The connection unit includes a first terminal electrically connected to a positive electrode of the external power source, a second terminal electrically connected to a negative electrode of the external power source, and the first terminal and the second terminal. And a third terminal electrically insulated
The third terminal is configured to be able to apply a voltage having a voltage value corresponding to the type of the light source supplied with power from the power adjustment unit,
The control unit detects the voltage of the third terminal, compares the detected voltage of the third terminal with a first threshold value and a second threshold value lower than the first threshold value, When the voltage at the third terminal is equal to or higher than the first threshold, the type of the light source is determined as the first type. When the voltage at the third terminal is equal to or lower than the second threshold, the type of the light source is When the voltage of the third terminal is higher than the second threshold value and lower than the first threshold value, the type of the light source is undefined,
The control unit further controls the power adjustment unit with the first control content when the determined type of the light source is the first type, and the determined type of the light source is the second type. In some cases, the power adjustment unit is controlled with a second control content that is at least partially different from the first control content. The third terminal can be electrically connected to a wire that is electrically connected to the electrode corresponding to the type of the light source that is supplied with power from the power adjustment unit among the two electrodes of the positive electrode and the negative electrode of the external power source. The lighting device according to claim 1. The lighting device according to claim 1, further comprising a reference power supply circuit that applies a reference voltage having a voltage value different from a power supply voltage of the external power supply to the third terminal. It has the 1st lighting device which consists of a lighting device of any one of Claims 1-3, and the 2nd lighting device which consists of the lighting device of any one of Claims 1-3. ,
The control unit of the first lighting device transmits a communication signal including a determination result of the type of the light source to the second lighting device, and a determination result of the type of the light source in the second lighting device. And receiving a communication signal transmitted from the second lighting device,
The control unit of the second lighting device transmits a communication signal including a determination result of the type of the light source to the first lighting device, and a determination result of the type of the light source in the first lighting device. And receiving a communication signal transmitted from the first lighting device,
In the case where the type of the light source is indefinite, the control unit of the first lighting device estimates the type of the light source according to the determination result included in the received communication signal,
The control unit of the second lighting device estimates the type of the light source according to the determination result included in the received communication signal when the type of the light source is indefinite. In the case where the control unit of the first lighting device stores the first type or the second type as a first initial value of the type of the light source, and the type of the light source is indefinite. If the determination result included in the received communication signal is indefinite, the type of the light source is estimated as the first initial value,
In the case where the control unit of the second lighting device stores the first type or the second type as a second initial value of the type of the light source, and the type of the light source is indefinite. The illumination control system according to claim 4, wherein if the determination result included in the received communication signal is indefinite, the type of the light source is estimated as the second initial value. The control unit of the first lighting device determines that the determination result included in the received communication signal is the first initial value when the determination result of the type of the light source does not match the first initial value. If not, the type of the light source is estimated as the first initial value,
The control unit of the second lighting device determines that the determination result included in the received communication signal is the second initial value when the determination result of the type of the light source does not match the second initial value. The illumination control system according to claim 5, wherein if it does not match, the type of the light source is estimated as the second initial value. The control unit of the first lighting device determines that the determination result included in the received communication signal is the second initial value when the determination result of the type of the light source does not match the first initial value. If not, the type of the light source is estimated as the first initial value,
The control unit of the second lighting device determines that the determination result included in the received communication signal is the first initial value when the determination result of the type of the light source does not match the second initial value. The illumination control system according to claim 6, wherein if it does not match, the type of the light source is estimated as the second initial value. The control unit of the first lighting device determines the type of the light source based on the determination result included in the received communication signal when the determination result of the type of the light source does not match the first initial value. The first type or the second type, and update the first initial value to the estimated light source type,
The control unit of the second lighting device determines the type of the light source based on the determination result included in the received communication signal when the determination result of the type of the light source does not match the second initial value. The lighting control system according to claim 6, wherein the first type or the second type is estimated, and the second initial value is updated to the estimated type of the light source. A control device for transmitting the control signal to the first lighting device and the second lighting device;
The control unit of the first lighting device notifies the control device of the occurrence of an abnormality when the type of the light source is indefinite and when the determination result does not match the first initial value. ,
The control unit of the second lighting device notifies the control device of the occurrence of an abnormality when the type of the light source is indefinite and when the determination result does not match the second initial value. The lighting control system according to claim 8. An illumination device comprising: the lighting device according to claim 1; and a light source that is turned on by the lighting device. A vehicle comprising: the lighting device according to claim 10 or the lighting control system according to any one of claims 4 to 9; and a vehicle body on which the lighting device or the lighting control system is mounted.

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