JP6162522B2 - Light emitting element driving device - Google Patents

Description

  The present invention relates to a light emitting element driving apparatus, and more particularly to a light emitting element driving apparatus capable of dimming control of a plurality of light emitting element groups.

  Conventionally, in a lighting device or a lighting system, a light emitting element driving device that drives a plurality of light sources based on a main control signal is used. In such a light emitting element driving device, a plurality of light source driving units are connected in series or in parallel, and the light source corresponding to each of the light source driving units is driven based on the main control signal. (For example, refer to Patent Document 1).

  The illumination control system described in Patent Document 1 below has a configuration in which a plurality of controllable drivers are connected in series or in parallel to a control interface that outputs a main control signal. A plurality of drivers for driving the light sources are connected in series to each controllable driver.

JP 2009-54585 A

  Incidentally, the illumination control system described in the above-mentioned Patent Document 1 has the following problems.

  That is, in such a lighting control system, it is necessary to provide a control interface that transmits a main control signal to at least one controllable driver, and the circuit configuration of the lighting control system is complicated. is there. In addition, when the controllable drivers are connected to each other, the control interface can be arranged only at one end thereof, and there is a problem that the degree of freedom of arrangement of the control interface is low.

  Further, the controllable driver connected to the control interface performs uniform control based on the main control signal for the driver connected in series to the driver and the other controllable drivers connected in series to the driver. . Therefore, there are restrictions on performing partial dimming control in the illumination control system.

  The present invention has been made to solve such a problem, and can perform various dimming controls, and can emit light emitting element driving units and dimming control units in various modes. An object is to provide an element driving device.

In order to achieve the above object, according to one aspect of the present invention, a light emitting element driving device connected to one power supply unit and driving a plurality of light emitting element groups is provided so as to correspond to each of the plurality of light emitting element groups. A plurality of light emitting element driving unit groups for driving the corresponding light emitting element groups, and at least one dimming operation capable of controlling a dimming operation of at least a part of the plurality of light emitting element driving unit groups. A plurality of light emitting element driving unit groups and at least one dimming control unit constitute a series body connected in series to the power supply unit, and the series body has a power source at one end thereof. The unit is connected and operates using the driving power supplied by the power supply unit, and is controlled by at least one of the dimming control units and the dimming control unit of the plurality of light emitting element driving unit groups. From what becomes, Ri placeable der in any position of the series connection body, the dimming control unit is arranged between one another one of the plurality of light emitting element driving unit group.

  Preferably, the series body includes a dimming unit having at least one of the light emitting element driving unit groups constituting the series body and one that controls the dimming operation of the light emitting element driving unit group among the dimming control units. At least one is provided.

  Preferably, at least one dimming unit includes one dimming control unit and two light emitting element driving unit groups, and one dimming control unit is either one of the two light emitting element driving unit groups or Control both dimming operations.

  Preferably, the two light emitting element driving unit groups are arranged on both sides of one dimming control unit, and the one dimming control unit performs dimming operations of the two light emitting element driving unit groups independently of each other. And can be controlled.

Preferably, the serial body controls the dimming operations of the first light emitting element driving unit group and the second light emitting element driving unit group, and the first light emitting element driving unit group and the second light emitting element driving unit group, respectively. The dimming control unit and the first light emitting element driving unit group constitute a dimming unit.
Preferably, the plurality of light emitting element driving unit groups and at least one dimming control unit are provided on circuit boards independent of each other.

  Preferably, the dimming unit includes a plurality of light emitting element driving unit groups and a dimming control unit that controls the dimming operations thereof, and the dimming units that control the plurality of light emitting element driving unit groups and the dimming operations thereof. The electric wires that connect the control units to each other are arranged in a unified manner among these units.

  Preferably, the electric line includes a power supply voltage line to which a power supply voltage of the power supply unit is supplied, a circuit ground line connected to the circuit ground of the power supply unit, and light emission to be controlled by the dimming control unit from the dimming control unit And a control signal line for transmitting a dimming control signal to the element driving unit group and controlling a dimming operation of the light emitting element driving unit group.

  According to these inventions, the plurality of light emitting element driving unit groups and at least one dimming control unit constitute a serial body, and among the plurality of light emitting element driving unit groups, what is to be controlled by the dimming control unit is It can be arranged at any position in the series body. Therefore, it is possible to provide a light emitting element driving apparatus that can perform various dimming control and can arrange the light emitting element driving unit and the dimming control unit in various modes.

It is a block diagram which shows the basic composition of the illuminating device using the LED drive device in embodiment of this invention. It is a figure explaining the structure of a LED drive part group, and the structure of a LED module group. It is a figure which shows the 1st example of a structure of an illuminating device. It is a figure which shows the 2nd example of a structure of an illuminating device. It is a figure which shows the 3rd example of a structure of an illuminating device. It is a figure which shows the 4th example of a structure of an illuminating device. It is a figure which shows the 5th example of a structure of an illuminating device. It is a figure which shows the 6th example of a structure of an illuminating device. It is a figure which shows the 7th example of a structure of an illuminating device. It is a figure which shows the 8th example of a structure of an illuminating device.

  Hereinafter, an LED driving device (an example of a light emitting element driving device) according to an embodiment of the present invention will be described.

  An LED drive device is used for the illuminating device which employ | adopted LED (light emitting diode) as the light source, for example. The LED driving device is configured to drive a plurality of sets of LED modules each composed of a plurality of LEDs.

  [Embodiment]

  FIG. 1 is a block diagram showing a basic configuration of a lighting device using an LED driving device according to an embodiment of the present invention.

  As illustrated in FIG. 1, the lighting device 900 includes an LED driving device (hereinafter, simply referred to as a driving device) 1, a power supply unit 10, and a light source unit 50. The driving device 1 includes one dimming control unit 21 and n (n is an integer of 1 or more) LED driving unit group 31 (LED driving unit first group 311, LED driving unit second group 312,..., LED Drive unit n-th group 31n). The drive device 1 is connected to a power supply unit 10. The light source unit 50 includes n LED module groups (an example of a light emitting element group) 51 (LED module first group 511, LED module second group 512,..., LED module n group 51n). For example, one LED module group 51 is provided so as to correspond to each LED driving unit group 31. Each LED module group 51 is connected to a corresponding one of the plurality of LED drive unit groups 31.

  For example, the dimming control unit 21 is provided on a circuit board independent of the LED drive unit group 31. Note that at least one dimming control unit 21 may be provided.

  Each of the plurality of LED drive unit groups 31 is composed of circuit boards independent of each other. Each LED drive unit group 31 is dimmed and controlled by the dimming controller 21. The LED drive unit group 31 can drive the LED module group 51 connected thereto.

  In the light source unit 50, each of the LED module groups 51 is mounted on a circuit board independent of each other, for example, but is not limited thereto. For example, each of the LED module groups 51 may be mounted on the same circuit board as the corresponding LED driving unit group 31. In other words, each LED module group 51 may share the same circuit board as the corresponding one of the plurality of LED drive unit groups 31.

  The dimming control unit 21 and all the LED drive unit groups 31 are connected to the power supply unit 10 in series. A power supply voltage line Lv, which is a power supply line from the power supply unit 10, and a circuit ground line Lg connected to the circuit ground of the power supply unit 10 are connected to each part of these driving devices 1 in a transverse manner. The drive device 1 operates with drive power (power supply voltage) supplied from the power supply unit 10 via the power supply voltage line Lv and the circuit ground line Lg. That is, the drive device 1 has a series body in which all of the plurality of LED drive unit groups 31 and at least one dimming control unit 21 are connected in series to one power supply unit 10.

  Each of the plurality of LED drive unit groups 31 is connected to a control signal line Ct from the dimming control unit 21. The control signal line Ct is provided so as to correspond to each of the plurality of LED drive unit groups 31. The dimming signal output from the dimming control unit 21 is input to each LED drive unit group 31 via the control signal line Ct, and the dimming operation of each LED drive unit group 31 is controlled. As described above, in the present embodiment, the plurality of LED drive unit groups 31 and the dimming control unit 21 are provided with the electric lines Lv, Lg, and Ct in a unified manner between the respective units. Are connected by.

  In addition, the LED drive part group 31 should just be provided with at least 2 group. As shown in FIG. 1, as the LED drive unit group 31, those of the first group to the n-th group are provided, and correspondingly, the LED module group 51 of the first group to the n-th group is provided. Is provided. n should just be an integer greater than or equal to 2, and the LED drive part group 31 and the LED module group 51 should just be provided by various numbers. For example, the lighting device 900 may have a configuration in which n is 3, that is, a configuration including three LED driving unit groups 311, 312, 313 and three LED module groups 511, 512, 513. Further, for example, the lighting device 900 may have a configuration in which n is 6, that is, a configuration including six LED driving unit groups 311 to 316 and six LED module groups 511 to 516.

  FIG. 2 is a diagram illustrating the configuration of each group of the LED drive unit group 31 and the configuration of each group of the LED module group 51.

  As shown in FIG. 2, each group of the LED drive unit group 31 includes m (m is an integer of 1 or more) LED drive units 33 (first LED drive unit 331, second LED drive unit 332, ..., m-th LED drive part 33m) is included. Each LED drive unit 33 is connected in series via a power supply voltage line Lv, a circuit ground line Lg, and a control signal line Ct. That is, the electric wires of these unified modes (the number of wirings and the types of electric wires) are arranged between the respective parts.

  Each group of the LED drive unit group 31 includes one LED drive unit 33 unit, a group unit of several LED drive units 33 among the plurality of LED drive units 33, or one LED drive unit group 31 unit. It is mounted on the circuit board. The LED drive unit group 31 only needs to have at least one LED drive unit 33, and may have only one LED drive unit 33, for example.

  Each group of the LED module group 51 includes m LED modules 53 (first LED module 531, second LED module 532,..., M-th LED module 53m). That is, the LED module group 51 includes the same number of LED modules 53 as the number of LED driving units 33. Each of the LED modules 53 is driven by the corresponding LED driving unit 33.

  Each LED module 53 is configured using at least one LED. The configuration of each LED module 53 is not particularly limited, and a plurality of LEDs connected in series, a plurality of LEDs connected in parallel, and a plurality of LEDs connected in series and parallel. Or any one having only one LED.

  Next, a specific configuration example of the lighting device 900 in this embodiment will be described.

  In the present embodiment, one dimming control unit 21 or a plurality of dimming control units 21 can be arranged at an arbitrary position in a series body composed of the dimming control unit 21 and the LED driving unit group 31. . The position where the dimming control unit 21 is arranged can be set as appropriate according to the position of the LED drive unit group 31 to be controlled among the plurality of LED drive unit groups 31. In other words, the dimming control unit 21 and the LED driving unit group 31 to be controlled by the dimming control unit 21 can be arranged at any position in the series body.

  FIG. 3 is a diagram illustrating a first example of the configuration of the illumination device 900.

  As shown in FIG. 3, in the driving device 1 of the first example, the dimming unit 20 including one dimming control unit 21 and one LED driving unit group 31 that is dimmed and controlled by the dimming control unit 21 includes: A plurality are connected in series. In this example, the drive device 1 includes two dimming units 20a and 20b connected in series. The dimming unit 20 a includes a first dimming control unit 21 a and an LED driving unit group (first group) 311. The dimming unit 20 b includes a second dimming control unit 21 b and an LED driving unit group (second group) 312.

  The light source unit 50 is provided with an LED module group (first group) 511 and an LED module group (second group) 512. The LED module group 511 is driven by the LED driving unit group 311. The LED module group 512 is driven by the LED driving unit group 312.

  The LED drive unit group 311 performs the dimming operation of the LED module group 511 by the dimming control signal Ct1 from the first dimming control unit 21a, and drives the LED module group 511. The LED driving unit 312 performs the dimming operation of the LED module group 512 by the dimming control signal Ct2 from the second dimming control unit 21b, and drives the LED module group 512.

  FIG. 4 is a diagram illustrating a second example of the configuration of the illumination device 900.

  As shown in FIG. 4, the driving device 101 of the second example includes one dimming control unit (first dimming control unit) 121 and two LED driving unit groups 1311 and 1312 arranged on both sides thereof. The light control unit 120 comprised by these is used. The first dimming control unit 121 is configured to perform dimming control on only one LED driving unit group 1312.

  A dimming control signal output from the first dimming control unit 121 is not input to the LED drive unit group (first group) 1311. The LED drive unit group 1311 lights and drives the LED module group (first group) 511 with a predetermined brightness. On the other hand, a dimming control signal Ct3 output from the first dimming control unit 121 is input to the LED drive unit group (second group) 1312. The LED drive unit group 1312 performs the dimming operation of the LED module group (second group) 512 in accordance with the dimming control signal Ct3.

  FIG. 5 is a diagram illustrating a third example of the configuration of the illumination device 900.

  In the third example, the driving apparatus includes a dimming unit including one dimming control unit and two LED driving unit groups arranged on both sides thereof, one dimming control unit, and one LED driving unit. A dimming unit composed of a group is connected in series. As shown in FIG. 5, in the driving device 201 in the third example, the dimming unit 220a is connected to the power supply unit 10, and the dimming unit 220b is connected to the dimming unit 220a.

  The dimming unit 220a is provided with a first dimming control unit 221a, and an LED driving unit group (first group) 2311 and an LED driving unit group (second group) 2312 disposed on both sides thereof. . The dimming unit 220b is provided with a second dimming control unit 221b and an LED driving unit group (third group) 2313 connected to the second dimming control unit 221b. The light source unit 250 is provided with three LED module groups 511, 512, and 513. The LED module group (first group) 511 is driven by the LED driving unit group 2311. The LED module group (second group) 512 is driven by the LED driving unit group 2312. The LED module group (third group) 513 is driven by the LED driving unit group 2313.

  The dimming unit 220a functions in the same manner as the dimming unit 120 of the second example. That is, a dimming control signal from the first dimming control unit 221a is not input to the LED driving unit group 2311, and the LED module group 511 is driven to light with a predetermined brightness. On the other hand, the LED drive unit group 2312 performs the dimming operation of the LED module group 512 according to the dimming control signal Ct4 input from the first dimming control unit 221a.

  In the dimming unit 220b, the dimming control signal Ct5 output from the second dimming control unit 221b is input to the LED drive unit group 2313. The LED drive unit group 2313 performs the dimming operation of the LED module group 513 in accordance with the dimming control signal Ct5.

  FIG. 6 is a diagram illustrating a fourth example of the configuration of the illumination device 900.

  In the fourth example, the driving device has a dimming unit including one dimming control unit and two LED driving unit groups, and the two LED driving unit groups are both one. Dimming control is performed by the dimming control unit. For example, as shown in FIG. 6, in the driving device 301 of the fourth example, the dimming unit 320 includes a first dimming control unit 321 and two LED driving unit groups 3311 arranged on both sides thereof. 3312. The LED module group (first group) 511 is driven by the LED driving unit group 3311. The LED module group (second group) 512 is driven by an LED driving unit group 3312.

  In the driving device 301, the dimming unit 320 includes an LED driving unit group (first group) 3311, a first dimming control unit 321, and an LED driving unit group (second group) 3312 in order with respect to the power supply unit 10. It is configured to be arranged in series. The first dimming control unit 321 outputs a dimming control signal Ct6 to the LED driving unit group 3311 and outputs a dimming control signal Ct7 to the LED driving unit group 3312. The LED drive unit group 3311 performs a dimming operation according to the dimming control signal Ct6. The LED drive unit group 3312 performs a dimming operation according to the dimming control signal Ct7. In other words, the LED drive unit groups 3311 and 3312 each perform a dimming operation independently of each other.

  FIG. 7 is a diagram illustrating a fifth example of the configuration of the illumination device 900.

  In the fifth example, the drive device has a dimming unit composed of one dimming control unit and two LED driving unit groups, as in the fourth example, and the two LED driving units. Both groups are configured such that dimming control is performed by one dimming control unit. In the fifth example, the positional relationship of each part in the light control unit is different from that in the fourth example.

  That is, as illustrated in FIG. 7, in the driving device 401 of the fifth example, the dimming unit 420 is configured such that the first dimming control unit 421 and the LED driving unit group (first group) with respect to the power supply unit 10. ) 4311 and the LED driving unit group (second group) 4312 are arranged in series in this order. The first dimming control unit 421 outputs a dimming control signal Ct8 to the LED drive unit groups 4311 and 4312. The dimming control signal Ct8 output to the LED drive unit group 4311 is input to the LED drive unit group 4311 and then input to the LED drive unit group 4312 via the LED drive unit group 4311. Both the LED drive unit groups 4311 and 4312 execute a dimming operation according to the dimming control signal Ct8 input thereto. That is, the LED drive unit groups 4311 and 4312 perform a dimming operation in synchronization with each other according to the dimming control signal Ct8.

  FIG. 8 is a diagram illustrating a sixth example of the configuration of the illumination device 900.

  In the sixth example, the driving device has a dimming unit including one dimming control unit and two LED driving unit groups, as in the fourth and fifth examples. Both of the two LED driving unit groups are configured to be dimmed and controlled by one dimming control unit. In the sixth example, the positional relationship of each part in the light control unit is different from the fourth example and the fifth example.

  As shown in FIG. 8, in the driving device 501 of the sixth example, the dimming unit 520 has an LED driving unit group (first group) 5311 and an LED driving unit group (second group) with respect to the power supply unit 10. ) 5312 and the first dimming control unit 521 are arranged in series in this order. That is, in the dimming unit 520, the first dimming control unit 521 is disposed at a position farthest from the power supply unit 10. The first dimming control unit 521 outputs a dimming control signal Ct9 to the LED drive unit groups 5312 and 5311. The dimming control signal Ct9 output to the LED drive unit group 5312 is input to the LED drive unit group 5312 and then input to the LED drive unit group 5311 via the LED drive unit group 5312. Both the LED drive unit groups 5311 and 5312 perform a dimming operation in accordance with the dimming control signal Ct9 input to each. That is, the LED drive unit groups 5311 and 5312 perform a dimming operation in synchronization with each other according to the dimming control signal Ct9.

  FIG. 9 is a diagram illustrating a seventh example of the configuration of the illumination device 900.

  In the seventh example, the driving device has one dimming unit configured by one dimming control unit and one LED driving unit group, and one LED driving unit group different from the above-described one. ing. That is, the drive device includes two LED drive unit groups. Both of the two LED drive unit groups are dimmed and controlled by one dimming control unit included in the dimming unit. In the seventh example, regarding the drive control of the light source unit 50, the dimming unit having the dimming control unit operates as a master unit, and the LED driving unit group that does not constitute the dimming unit operates as a slave unit.

  As illustrated in FIG. 9, the drive device 601 of the seventh example is configured to provide the LED drive unit group (first group) 6311, the first dimming control unit 621, and the LED drive unit group ( (Second group) 6312 is arranged in series in order. Among these units, the LED drive unit group 6311 and the first dimming control unit 621 constitute a dimming unit 620. The first dimming control unit 621 outputs the dimming control signal Ct10 to the LED driving unit group 6311 and outputs the dimming control signal Ct11 to the LED driving unit group 6312. The LED drive unit group 6311 performs a dimming operation based on the dimming control signal Ct10. In addition, the LED drive unit group 6312 performs a dimming operation based on the dimming control signal Ct11. That is, the LED driving unit groups 6311 and 6312 each perform a dimming operation independently of each other.

  FIG. 10 is a diagram illustrating an eighth example of the configuration of the illumination device 900.

  In the eighth example, as in the seventh example, the driving device includes one dimming unit configured by one dimming control unit and one LED driving unit group, and one different from the above-described one. As for the drive control of the light source unit 50, the dimming unit having the dimming control unit operates as a master unit, and the LED driving unit group not constituting the dimming unit operates as a slave unit.

  As illustrated in FIG. 10, the drive device 701 of the eighth example is configured with respect to the power supply unit 10 by a first dimming control unit 721, an LED drive unit group (first group) 7311, and an LED drive unit group ( (Second group) 7312 is arranged in series in order. Among these units, the LED drive unit group 7311 and the first dimming control unit 721 constitute a dimming unit 720. The first dimming control unit 721 outputs a dimming control signal Ct12 to the LED driving unit groups 7311 and 7312. The dimming control signal Ct12 is input to the LED drive unit group 7311 and is input to the LED drive unit group 7312 via the LED drive unit group 7311. Based on the dimming control signal Ct12, the LED drive unit groups 7311 and 7312 execute the dimming operation in synchronization.

  [Effects of the embodiment]

  In the present embodiment, the following effects are produced when the drive device has the above-described configuration.

  That is, in a configuration in which a plurality of LED driving unit groups perform dimming operation, the LED driving unit group and the dimming control unit can be flexibly arranged at desired positions. Therefore, the configuration and layout of the driving device can be easily changed. Appropriate configurations and layouts can be employed in accordance with the location and use of the driving device.

  The drive device does not need to include a dimming input interface and a dimming signal generation unit that are required in many conventional devices, and if it has the minimum necessary dimming control unit, it is connected to it. In addition, it is possible to perform dimming control of a large number of LED driving unit groups. Therefore, the configuration of the driving device can be relatively simplified, and the manufacturing cost of the driving device can be reduced.

  The arrangement position of the dimming control unit in the driving device can be changed as appropriate, and thereby, the portion of the plurality of LED driving unit groups that is subject to dimming control can be freely changed. Thereby, the part which performs dimming control among light sources can be changed, and various lighting effects and partial dimming with a high degree of freedom can be performed.

  A large number of dimming control units can be arranged in a series of coupled pairs connected in series in the drive device. As a result, the dimming control units can independently control the dimming of the LED driving unit groups arranged on one side or both sides thereof, so that the dimming control is individually performed for the plurality of LED driving unit groups in the driving device. It becomes possible. When the LED drive unit group is arranged on both sides of the dimming control unit, the dimming control unit can execute dimming control of the LED drive unit groups on both sides independently.

  When an LED drive unit group is added to the drive device, the LED drive unit group may be arranged in series at a position where dimming control can be performed by an existing dimming control unit. Moreover, you may make it arrange | position a LED drive part group in series with the existing light control unit with the light control part different from an existing thing. That is, the LED drive unit group can be added to the drive device relatively easily.

  Further, as shown in the seventh and eighth examples described above, in the case where the master unit and the slave unit are configured to operate for the drive control of the light source unit, the number of connections of the slave units is set as follows. By changing, the configuration of the drive device can be easily changed. In addition, by arranging a plurality of master units in the connection of the driving devices, it is possible to individually perform dimming control on some of the connections of the driving devices.

  In the present embodiment, since the number of electric wires between the connections inside the drive device is standardized, the type of cable for connection can be standardized to one. By unifying the number of electric wires as described above, an increase in the number of wires can be suppressed, and the cost of a connecting cable can be reduced. Specifically, in this embodiment, the power supply voltage line, the circuit ground line, and the control signal line are unified so as to be wired between the connections. In addition, since the types of cables are unified in this way, it is not necessary to use a new cable when the number of connections is increased or the connection configuration is changed.

  [Others]

  The configuration of the light control unit, the configuration of the driving device, and the like are not limited to the above-described embodiment.

  A light emitting element is not limited to LED. The light emitting element group driven by one light emitting element driving device is not limited to one type (for example, LED), and a plurality of types of light emitting element groups may be mixed. For example, a device using a fluorescent tube may be used as a light emitting device, or a driving device that drives a light source unit in which a light emitting device using an LED and a light emitting device using a fluorescent lamp are mixed. May be configured. A drive device is not restricted to what is used for an illuminating device. That is, the driving device can be widely used to drive a light emitting element group used for various applications.

  The number of electrical wires for connection is not limited to three as shown in the above embodiment. Moreover, the specification of the electric wire is not limited to that shown in the above-described embodiment, and may be any standard as long as it is unified in each part of the driving device. For example, as the electric wires, other types of electric wires may be wired in addition to the three electric wires shown in the above-described embodiment.

  The above embodiment should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

1,101,201,301,401,501,601,701 LED driving device (an example of a light emitting element driving device)
20 (20a, 20b), 120, 220a, 220b, 320, 420, 520, 620, 720 Dimming unit 21 (21a, 21b), 121, 221a, 221b, 321, 421, 521, 621, 721 Dimming control Unit 31 (311, 312, 31n), 1311, 1312, 2311 to 2313, 3311, 3312, 4311, 4312, 5311, 5312, 6311, 6312, 7311, 7312 LED driving unit group (an example of a light emitting element driving unit group)
50, 250 Light source 51 (511, 512, 513, 51n) LED module group (an example of light emitting element group)
Ct control signal line Ct1 to Ct12 Dimming control signal Lg Circuit ground line Lv Power supply voltage line 900 Illumination device

Claims (8)

A light-emitting element driving apparatus that is connected to one power supply unit and drives a plurality of light-emitting element groups,
A plurality of light emitting element driving unit groups provided to correspond to each of the plurality of light emitting element groups and driving the corresponding light emitting element groups;
And at least one dimming control unit capable of controlling the dimming operation of at least some of the plurality of light emitting element driving unit groups.
The plurality of light emitting element driving unit groups and the at least one dimming control unit constitute a series body connected in series to the power supply unit,
The series body is connected to the power supply unit at one end thereof, and operates using driving power supplied by the power supply unit,
At least one of the dimming control units and the one to be controlled by the dimming control unit among the plurality of light emitting element driving unit groups can be arranged at any position in the series body,
The light control unit is a light emitting element driving device arranged between one of the plurality of light emitting element driving unit groups and the other one.   The series body includes a dimming unit having at least one light emitting element driving unit group constituting the series body and one that controls a dimming operation of the light emitting element driving unit group among the dimming control units. The light emitting element drive device according to claim 1, comprising at least one. The at least one dimming unit comprises:
One dimming controller,
Comprising two light emitting element driving unit groups;
The light emitting element driving device according to claim 2, wherein the one dimming control unit controls a dimming operation of one or both of the two light emitting element driving unit groups. The two light emitting element driving unit groups are arranged on both sides of the one dimming control unit,
The light-emitting element driving device according to claim 3, wherein the one dimming control unit is capable of independently controlling the dimming operations of the two light-emitting element driving unit groups. The series body is
A first light emitting element driving unit group and a second light emitting element driving unit group;
A dimming control unit for controlling dimming operations of the first light emitting element driving unit group and the second light emitting element driving unit group,
The light emitting element driving device according to claim 2, wherein the one dimming control unit and the first light emitting element driving unit group constitute the dimming unit. 6. The light emitting element driving device according to claim 2 , wherein the plurality of light emitting element driving unit groups and the at least one dimming control unit are provided on circuit boards independent of each other. The dimming unit includes a plurality of light emitting element driving unit groups and a dimming control unit that controls the dimming operation thereof,
The electric wires that connect the plurality of light emitting element driving unit groups and the dimming control units that control the dimming operations thereof are arranged in a unified manner between these units. 7. The light emitting element driving device according to any one of items 1 to 6. The electric wire is
A power supply voltage line to which the power supply voltage of the power supply unit is supplied;
A circuit ground line connected to the circuit ground of the power supply unit;
A control signal line for transmitting a dimming control signal from the dimming control unit to the light emitting element driving unit group to be controlled by the dimming control unit and controlling the dimming operation of the light emitting element driving unit group; The light emitting element drive device of Claim 7 containing.

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