JP5687784B1 - LED lighting device - Google Patents

Abstract

An LED illumination device that can reduce manufacturing costs is provided. A heat sink having a main surface 51a and a back surface 51b, and a through hole 53a provided between the main surface 51a and the back surface 51b, and a plurality of LED substrates 6 provided on the main surface 51a side. And a first LED lighting device 71 provided on the back surface 51b side. The plurality of LED boards 6 are arranged apart from each other in the X-axis direction, and the adjacent LED boards 6 are connected by the wiring 11 to constitute the first LED illumination circuit 10. The first wiring 71 a that connects the anode side of the first LED lighting device 71 to the first LED lighting circuit 10 and the cathode side of the first LED lighting device 71 are connected to the first LED lighting circuit 10. The second wiring 71 b is drawn from the back surface 51 b side through the through hole 53 a to the main surface 51 a side, and is connected to the LED substrate 6 adjacent to the through hole 53 a among the plurality of LED substrates 6. [Selection] Figure 1

Description

  The present invention relates to an LED (Light Emitting Diode) illumination device.

  As this type of prior art, for example, there is one disclosed in Patent Document 1. That is, in Patent Document 1, an LED module in which a plurality of light emitting diode elements are arranged in series, an illumination lighting device that lights the light emitting diode elements, and a plurality of wirings that connect the illumination lighting device and the LED module are included. There is described an LED lighting device including a first wiring that connects the anode side of the LED and a second wiring that connects a cathode side of the LED module among a plurality of wirings that connect the illumination lighting device and the LED module. It also describes that the length of the first wiring is made shorter than the length of the second wiring.

JP 2013-168276 A

In the LED lighting device disclosed in Patent Document 1, the generation of high-frequency noise is reduced by shortening the wiring length of the first wiring connected to the anode side (that is, a high voltage is applied).
However, in Patent Document 1, no consideration is given to shortening the wiring length of the second wiring connected to the cathode side, and as shown in FIG. 11, the wiring length of the second wiring is long. . Thus, in patent document 1, since the wiring length of the 2nd wiring was long, there existed a subject that the usage-amount of a wiring material was large and manufacturing cost became high easily.

  Therefore, the present invention has been made in view of such circumstances, and an object of the present invention is to provide an LED lighting device capable of reducing the manufacturing cost.

  In order to solve the above problems, an LED lighting device according to an aspect of the present invention includes a first surface and a second surface positioned opposite to the first surface, and the first surface. And a support part provided with a through-hole between the second surface, a plurality of LED substrates provided on the first surface side, and an LED lighting device provided on the second surface side The plurality of LED substrates are arranged in one direction apart from each other, and adjacent LED substrates are connected by wiring to form an LED lighting circuit, and the anode side of the LED lighting device is the LED The first wiring connected to the lighting circuit and the second wiring connecting the cathode side of the LED lighting device to the LED lighting circuit pass through the through hole from the second surface side, and the first surface. LE pulled out to the side and adjacent to the through hole among the plurality of LED substrates Characterized in that it is connected to the substrate.

  In the LED lighting device, the LED board includes a plurality of LED elements, a conductive layer connecting the plurality of LED elements, and a first connection terminal and a second connection terminal connected to the conductive layer. The shape of the LED board in plan view is rectangular, and the first connection terminal is disposed on the first side of the LED board, and the second connection terminal Is arranged on the side of the second side opposite to the first side of the LED substrate.

In the LED lighting device, the first wiring is connected to the connection terminal closer to the through hole among the first connection terminal and the second connection terminal included in the LED substrate adjacent to the through hole. And the second wiring may be connected to each other.
In the LED lighting device described above, the LED substrate adjacent to the through hole includes a first LED substrate and a second LED substrate located on both sides of the through hole in a plan view, and the first LED substrate. Of the first connection terminal and the second connection terminal of the LED substrate, the first wiring is connected to a connection terminal on the side close to the through hole, and the second LED substrate has the first Of the one connection terminal and the second connection terminal, the second wiring may be connected to a connection terminal closer to the through hole.

  In the LED lighting device described above, the LED substrate adjacent to the through hole includes a first LED substrate and a second LED substrate located on both sides of the through hole in a plan view, and the first LED substrate. Of the first connection terminal and the second connection terminal of the LED substrate, the first wiring is connected to a connection terminal on the side close to the through hole, and the second LED substrate has the first Of the one connection terminal and the second connection terminal, the second wiring may be connected to a connection terminal closer to the through hole.

Further, in the LED illumination device, in the pair of LED substrates adjacent in the one direction among the plurality of LED substrates, the first connection terminal of one LED substrate and the second connection of the other LED substrate. The terminals may be adjacent in the one direction, and the adjacent connection terminals may be connected by the wiring.
In the above LED lighting device, among all the first connection terminals and the second connection terminals included in the plurality of LED boards, the connection terminals located at at least one end portion in the one direction are connected. The input terminal and the output terminal of the terminal may be short-circuited.

  In the LED lighting device, the LED board is arranged in a first LED element circuit arranged in the first area of the LED board and in the second area of the LED board in a plan view. A second LED element circuit, wherein the first LED element circuit is connected in series via the wiring between at least some of the LED substrates. The LED element circuit is also connected in series via the wiring, and the current output from the anode side of the LED lighting device is directed toward the connection terminal located at the one end from the first wiring. Flow through the first LED element circuit connected in series, and then flow through the second LED element circuit connected in series from the connection terminal located at the one end toward the second wiring, Then, the LED lighting device It may be characterized in that return to the cathode side.

In the above LED lighting device, the current flowing through the second LED element circuit located at the last stage among the second LED element circuits connected in series is next to the second LED element circuit at the last stage. The first LED element circuit in the last stage provided on the same LED substrate as that of the LED element circuit may be flowed and then returned to the cathode side.
In the LED lighting device, a plurality of the LED lighting circuits are provided, and in each of the plurality of LED lighting circuits, a connection terminal located at at least one end in the one direction is an input terminal and an output terminal of the connection terminal. And may be short-circuited.

In the LED lighting device, the first connection terminal and the second connection terminal may each be a 2-pin type connector terminal having an input terminal and an output terminal.
In the LED lighting device, the through hole may be provided between LED substrates adjacent in the one direction in a plan view.

  According to one embodiment of the present invention, the manufacturing cost of an LED lighting device can be reduced.

It is a figure which shows the structural example of the LED lighting apparatus 1 which concerns on embodiment of this invention. FIG. 2 is an exploded perspective view showing a configuration example of an LED lighting device 1. 3 is a plan view showing a configuration example of an LED substrate 6. FIG. FIG. 6 is a perspective view showing a configuration example of a first connector 67. 3 is a circuit diagram illustrating a configuration example of a first LED element circuit 61. FIG. It is a top view which shows the structural example of the 1st, 2nd LED illumination circuits 10 and 20. FIG. It is a top view which shows typically the structure of the 1st LED illumination circuit 10, and the flow of an electric current. It is a top view which shows typically the structure of the 2nd LED illumination circuit 20, and the flow of an electric current. It is a perspective view which shows the structural example of the 1st LED lighting device 71. FIG. 5 is a plan view showing a configuration example of a main surface reflection sheet 81. FIG. FIG. 6 is a perspective view illustrating a configuration example of a housing mounting portion 3. It is a top view which shows typically the modification of embodiment.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that, in each drawing described below, parts having the same configuration are denoted by the same reference numerals, and repeated description thereof is omitted.
<Configuration>
FIG. 1 is a diagram illustrating a configuration example of an LED illumination device 1 according to an embodiment of the present invention. Specifically, FIG. 1A is a perspective view of the LED lighting device 1 as viewed obliquely from above, and FIGS. 1B and 1C are side views of the LED lighting device 1. FIG. 2 is an exploded perspective view showing a configuration example of the LED lighting device 1. In FIGS. 1A to 1C, the panel plate 91, the reflection sheet 8, and the housing mounting portion 3 shown in FIG. 2 are not shown in order to clearly show the heat sink 5 and the LED substrate 6.

  As shown in FIGS. 1A to 1C and FIG. 2, the LED lighting device 1 is a square type lighting device. The LED lighting device 1 includes an LED unit 2 and a housing attachment portion 3 that houses the LED unit 2 and attaches the housed LED unit 2 to a portion to be attached (for example, a ceiling). The LED unit 2 includes a heat sink 5, a plurality of LED substrates 6 provided on the main surface side of the heat sink 5, an LED lighting device 7 provided on the back side opposite to the main surface of the heat sink 5, A reflection sheet 8 provided on the main surface side of the heat sink 5 and covering the plurality of LED substrates 6 and the like; a cover panel 9 provided on the main surface side of the heat sink 5 and covering the plurality of LED substrates 6 and the reflection sheet 8 and the like; Is provided. The LED lighting device 7 includes, for example, a first LED lighting device 71 and a second LED lighting device 72.

  In addition, when attaching LED lighting apparatus 1 to the ceiling of a building, in FIG. 1 (a)-(c) and FIG. 2, the negative | minus side (namely, lower side) of a Z-axis direction is equivalent to the ceiling side of a building, The plus side (that is, the upper side) in the Z-axis direction corresponds to the floor side of the building. Hereinafter, each component which comprises the LED lighting apparatus 1 is demonstrated.

(1) Heat Sink As shown in FIGS. 1A to 1C and 2, the heat sink 5 has a main surface 51 a and a back surface 51 b and has a rectangular shape (hereinafter referred to as a planar shape) in plan view. And a side plate provided along the outer peripheral portion of the support plate 51 and extending obliquely (or substantially vertically) from the main surface 51a of the support plate 51 toward the cover panel 9. As shown in FIG. 2, two through holes 53 a and 53 b that penetrate between the main surface 51 a and the back surface 51 b are provided in the central portion of the support plate 51.

  The side plate includes a first side plate 55, a second side plate 56, a third side plate 57, and a fourth side plate 58 arranged along the four sides of the outer periphery of the support plate 51. It surrounds the surface 51a side. The first side plate 55 and the third side plate 57 facing the first side plate 55 are integrated with the support plate 51 (that is, the first side plate is bent by bending both end portions of the support plate 51 in the X-axis direction). 55 and the third side plate 57). The second side plate 56 and the fourth side plate 58 are attached to the first side plate 55, the third side plate 57, and the support plate 51 using fastening parts 59 such as screws, lock pins, or rivets. .

  The first side plate 55 and the third side plate 57 are provided with a plurality of cut portions 54. The LED board 6 adjacent to the first side plate 55 and the third side plate 57 can be fixed to the main surface 51a side by bending these cut portions 54 toward the main surface 51a side of the support plate 51. The support plate 51 and the side plate are made of a material having excellent thermal conductivity, such as stainless steel.

In this embodiment, it is preferable that the second and fourth side plates 56 and 58 are attached substantially perpendicular to the main surface 51 a of the support plate 51. The second and fourth side plates 56 and 58 may be attached obliquely with respect to the main surface 51a of the support plate 51, but by attaching them substantially vertically, there is an advantage that the processing accuracy of the heat sink 5 can be improved.
In addition, the first and third side plates 55 and 57 are preferably provided at a certain angle with respect to the main surface 51a of the support plate 51 so that the LED element 65 spreads in the direction of illuminating light (that is, The first and third side plates 55 and 57 may be provided with wide angles so that the light is diffused.) Thereby, a reflective sheet can be affixed on the 1st, 3rd side plates 55 and 57 as it is.

  More specifically, the second and fourth side plates 56 and 58 are attached substantially perpendicular to the main surface 51a. For this reason, when sticking a reflective sheet diagonally on the 2nd, 4th side plates 56 and 58, the process of a reflective sheet may be needed so that a reflective sheet may become diagonally independent on the main surface 51a. is there. On the other hand, since the first and third side plates 55 and 57 are provided obliquely with respect to the main surface 51a, the reflection sheet is pasted on the first and third side plates 55 and 57 as they are. be able to. Since processing such as making the reflective sheet stand at an angle is unnecessary, it is possible to contribute to cost reduction of the reflective sheet.

(2) LED Board FIG. 3 is a plan view showing a configuration example of the LED board 6. Specifically, FIG. 3A is a plan view showing the appearance of the LED board 6, and FIG. 3B is a plan view schematically showing a configuration example of the first LED element circuit 61 arranged on the LED board 6. FIG.
In FIG. 3A, in order to clearly show the LED element 65 and the resistance element 66, the conductive layer 63 disposed below these elements is not shown. Also, in FIG. 3 and FIG. 5 described later, the subscript notations “i, i + 1,..., I + 19”, “k, k + 1,. It is a code | symbol for identifying the element 65 individually.

  As shown in FIGS. 3A and 3B, the shape of the LED substrate 6 in plan view is a rectangular shape (for example, a rectangle). The LED substrate 6 includes a plurality of LED elements 65, a plurality of resistance elements 66, a plurality of LED elements 65, a conductive layer 63 that connects the LED elements 65 and the resistance element 66, and a conductive layer 63. It has a protective layer 64 that covers and protects, and a first connector 67 and a second connector 68 that are connected to the conductive layer 63. The plurality of LED elements 65, the plurality of resistance elements 66, and the conductive layer 63 constitute a first LED element circuit 61 and a second LED element circuit 62.

  The resistance element 66 is an element for suppressing the LED element 65 from emitting light due to a discharge current when the power is turned off. By causing the discharge current when the power is off to flow not only to the LED element 65 but also to the resistance element 66, the amount of current flowing through the LED element 65 can be reduced, and light emission when the power is off can be suppressed. Moreover, it is preferable that the protective layer 64 is insulating and the color is the same color (for example, white) as the reflective sheet 8.

  As shown in FIG. 3A, the first LED element circuit 61 is disposed in the first region 6a of the LED substrate 6, and the second LED element circuit 62 is disposed in the second region 6b of the LED substrate 6. Has been. For example, the first region 6 a is a region located on one side (the left side in FIG. 3A) from the central portion in the longitudinal direction of the LED substrate 6. The second region 6b is a region located on the other side (the right side in FIG. 3A) from the central portion of the LED substrate 6 in the longitudinal direction.

  The first connector 67 is disposed on the first long side L1 side of the central portion of the LED board 6, and the second connector 68 is on the second long side L2 side of the central portion of the LED board 6. Is arranged. A plurality of through holes 69 are provided at a plurality of locations on the LED substrate 6. The LED board 6 is disposed on the first main surface 51a of the support plate 51 described above, and a fastening part such as a screw, a lock pin or a rivet is passed through these through holes 69, whereby the LED board 6 is attached to the support plate 51. Can be attached.

  The conductive layer 63 shown in FIG. 3B is formed on the base material of the LED substrate 6. For example, the base material is FR-4 or CEM-3, and the conductive layer 63 is made of copper (Cu). By selectively attaching the LED element 65 and the resistance element 66 to the conductive layer 63, the LED elements 65 and the LED elements 65 and the resistance element 66 are connected.

(2.1) Connector FIG. 4 is a perspective view showing a configuration example of the first connector 67. Specifically, FIG. 4A is a view of the first connector 67 viewed from the outside of the substrate, and FIG. 4B is a view of the first connector 67 viewed from the inside of the substrate.
As shown in FIGS. 4A and 4B, the first connector 67 is a two-pin type connector terminal, and has a first female hole 67a and a second female hole 67b. Here, the 2-pin type means a type having two female holes, and wirings are respectively connected to these female holes. The first connector 67 has a first pin terminal 67c connected to the first female hole 67a and a second pin terminal 67d connected to the second female hole 67b. The first pin terminal 67c and the second pin terminal 67d are connected to the conductive layer 63 of the LED substrate 6 by being fixed with solder.

  In this embodiment, for example, the first female hole 67a and the first pin terminal 67c are used as input terminals for inputting current to the LED board 6, and the second female hole 67b and the second pin terminal 67d are Used as an output terminal for outputting current from the LED substrate 6. Although not shown, the second connector 68 is also the same 2-pin type connector terminal as the first connector 67, and has an input terminal and an output terminal.

(2.2) First LED Element Circuit FIG. 5A is a circuit diagram showing a configuration example of the first LED element circuit 61.
As shown in FIG. 3B, the first LED element circuit 61 is arranged along the side of the LED substrate 6 among the 20 LED elements 65 arranged in the first region 6 a of the LED substrate 6. Next, four LED elements 65 adjacent to each other are connected in parallel, and the LED element groups connected in parallel are connected in series. That is, as shown in FIG. 5 (a), LED elements _{65 i, 10 i + 1,} 10 i + 2, 10 i + 3 are connected in parallel to form a first LED element group 61a. Further, the LED elements 65 _{i + 4} , 10 _{i + 5} , 10 _{i + 6} , 10 _{i + 7} are connected in parallel to constitute a second LED element group 61b. Similarly, the third LED elements 65 _{i + 8} to 10 _{i + 11} , 10 _{i + 12} to 10 _{i + 15} , 10 _{i + 16} to 10 _{i + 19} are connected in parallel, and the third to fifth LED element groups 61c to 61e are configured. Yes. The first to fifth LED element groups 61a to 61e are arranged in this order from the current input side (input terminal of the first connector 67) to the output side (output terminal of the second connector 68). Connected in series.

  Moreover, as shown to Fig.5 (a), the some resistive element 66 is connected in parallel with the 1st-5th LED element group 61a-61e. For example, one resistance element 66 is connected in parallel to the second to fifth LED element groups 61b to 61e. In addition, two resistance elements 66 connected in parallel are connected in parallel to the third and fourth LED element groups 61c and 61d connected in series.

(2.3) Second LED Element Circuit FIG. 5B is a circuit diagram showing a configuration example of the second LED element circuit 62. As shown in FIG. 5B, the second LED element circuit 62 has the same configuration as the first LED element circuit 61. That is, the LED elements 65 _{i + 16} , 10 _{i + 17} , 10 _{i + 18} , 10 _{i + 9} are connected in parallel to constitute the first LED element group 62a. Further, the LED elements 65 _{i + 12} , 10 _{i + 13} , 10 _{i + 14} , 10 _{i + 15} are connected in parallel to constitute a second LED element group 62b. Similarly, the third LED elements 65 _{i + 8} to 10 _{i + 11} , 10 _{i + 4} to 10 _{i + 7} , 10 _i to 10 _{i + 3} are connected in parallel, and the third to fifth LED element groups 62c to 62e are configured. Yes. The first to fifth LED element groups 62a to 62e are arranged in this order from the current input side (input terminal of the second connector 68) to the output side (output terminal of the first connector 67). Connected in series.

  Moreover, as shown in FIG.5 (b), the resistive element 66 is connected in parallel with the 1st-5th LED element group 62a-62e. For example, two resistance elements 66 connected in parallel are connected in parallel to the second to fifth LED element groups 62b to 62e. Further, the two resistance elements 66 connected in parallel are connected in parallel to the third and fourth LED element groups 62c and 62d connected in series.

  Note that the number and arrangement of the resistance elements 66 shown in FIGS. 5A and 5B are merely examples, and are not limited thereto. In the embodiment of the present invention, the number and arrangement of the resistance elements 66 may be arbitrarily set in each of the plurality of LED substrates 6. Further, the resistance value of each resistance element 66 may be arbitrarily set. The number, arrangement, and resistance value of the resistance elements 66 may be set in accordance with desired characteristics.

(3) LED illumination circuit As shown in FIGS. 1A to 1C and FIG. 2, the LED illumination device 1 includes a plurality of LED substrates 6. The plurality of LED substrates 6 are arranged apart from each other in the width direction of the LED substrate 6 (for example, the X-axis direction), and adjacent LED substrates 6 are connected by wiring to form an LED illumination circuit.

FIG. 6 is a plan view illustrating a configuration example of the first and second LED illumination circuits 10 and 20. 6 and FIG. 7 and FIG. 8 to be described later, subscript symbols “m, m + 1,..., M + 4”, “p, p + 1,. It is the code | symbol for identifying the some LED board 6 individually.
As shown in FIG. 6, the LED lighting device 1 has, for example, ten LED substrates 6. These ten LED boards 6 are arranged apart from each other in the X-axis direction. Of these ten LED boards 6, five LED boards _6m , _{6m + 1} , _{6m + 2} , _{6m + 3} , and _{6m + 4} arranged on the right side of the drawing are connected by the wiring 11 between the adjacent LED boards 6. The first LED illumination circuit 10 is configured. In addition, the five LED boards 6 _p , 6 _{p + 1} , 6 _{p + 2} , 6 _{p + 3} , and 6 _{p + 4} arranged on the left side of the paper surface are connected to each other by the wiring 21 to constitute the second LED illumination circuit 20. doing. Since the first LED illumination circuit 10 and the second LED illumination circuit 20 are not electrically connected, for example, they may be individually turned on or individually turned off.

  Further, as shown in FIG. 6, in the X-axis direction, when the distance between the LED elements 65 adjacent in the LED board 6 is d1, and the distance between the LED elements 65 adjacent between the LED boards 6 is d2, It is preferable to arrange the plurality of LED substrates 6 so that d1 = d2 or d1≈d2. Thereby, in the 1st LED lighting circuit 10 and the 2nd LED lighting circuit 20, the arrangement | positioning space | interval of the X-axis direction of the some LED element 65 becomes fixed. As a result, it is possible to contribute to in-plane uniformity of the luminous flux of the LED lighting device 1. Next, regarding the first LED illumination circuit 10 and the second LED illumination circuit 20, the connection between the LED substrates 6 and the flow of current will be described.

(3.1) First LED Lighting Circuit First, the first LED lighting circuit 10 will be described.
FIG. 7 is a plan view schematically showing the configuration of the first LED lighting circuit 10 and the current flow. As shown in FIG. 7, in the first LED lighting circuit 10, LED substrates 6m and 6m _{+ 1} are arranged on both sides of the through hole 53a. Further, the second connector 68 of the LED substrate _{6 m,} first connector 67 of the LED substrate _{6 m + 1} are respectively adjacent to the through hole 53a.
The first wiring 71a that connects the anode side of the first LED lighting device to the first LED lighting circuit 10 is drawn from the back side of the heat sink to the main surface side through the through hole 53a, and is adjacent to the through hole 53a. Connected to the first connector 67 of the LED board _{6m + 1} . The second wiring 71b that connects the cathode side of the first LED lighting device to the first LED lighting circuit 10 is drawn from the back side of the heat sink to the main surface side through the through hole 53a, and the through hole 53a. Is connected to the second connector 68 of the LED board 6 _m adjacent to the LED board 6 _m .

Further, a first connector 67 of the second connector 68 of the LED substrate _{6 m + 1} and the LED substrate _{6 m + 2} are connected by wiring 11. Similarly, the first connector 67 of the second connector 68 of the LED substrate _{6 m + 2} and the LED substrate _{6 m + 3} are connected by wiring 11, the second connector 68 of the LED substrate _{6 m + 3} and the LED substrate _{6 m + 4} The first connector 67 is connected to the wiring 11. Furthermore, the input terminal and the output terminal of the second connector 68 of the LED board 6 _{m + 4} (that is, the connector located at one end in the X-axis direction in the first LED lighting circuit 10) are connected by the wiring 11 (that is, Short circuit). Similarly, the input terminal and the output terminal of the first connector 67 of the LED board 6 _m (that is, the connector located at the other end in the X-axis direction in the first LED lighting circuit 10) are short-circuited by the wiring 11. ing.

Accordingly, the first LED element circuits 61 of the LED substrates 6 _{m + 1 to} 6 _{m + 4} are connected in series via the wiring 11, and the second LED element circuits 62 of the LED substrates 6 _{m to} 6 _{m + 4} are also connected via the wiring 11. Connected in series. And in the 1st LED lighting circuit 10, an electric current flows in the direction shown by the arrow of FIG.
That is, the current output from the anode side of the first LED lighting device is the first LED element circuit 61 connected in series from the first wiring 71a toward the second connector 68 of the LED substrate 6m _{+ 4} . Flowing. The current output from the output terminal of the second connector 68 of the LED board 6 _{m + 4} flows to the input terminal short-circuited to the output terminal. Then, the second LED element circuit 62 connected in series flows from the input terminal toward the first connector 67 of the LED board 6 _m . The current flowing through the second LED element circuit 62 located at the last stage of the second LED element circuits 62 connected in series (that is, disposed on the LED board 6 _m ) is the current of the LED board 6 _m . A current flows from the output terminal of the first connector 67 to the input terminal short-circuited to the output terminal. Then, the first LED element circuit 61 of the LED substrate _{6 m} from the input terminal flow then returns from the second wiring 71b on the cathode side of the first LED lighting device.

(3.2) Second LED Lighting Circuit Next, the second LED lighting circuit 20 will be described.
FIG. 8 is a plan view schematically showing the configuration of the second LED illumination circuit 20 and the current flow. As shown in FIG. 8, in the 2nd LED illumination circuit 20, LED board 6p and 6p + 1 are each arrange | positioned at the both sides of the through-hole 53b. Further, the first connector 67 of the LED board 6p and the second connector 68 of the LED board 6p + 1 are adjacent to the through hole 53b. The first wiring 72a that connects the anode side of the second LED lighting device to the second LED lighting circuit 20 is drawn from the back side of the heat sink to the main surface side through the through hole 53b, and is adjacent to the through hole 53b. Connected to the second connector 68 of the LED board 6p + 1. Further, the second wiring 72b that connects the cathode side of the second LED lighting device to the second LED lighting circuit 20 is drawn from the back side of the heat sink to the main surface side through the through hole 53b, and the through hole 53b. Is connected to the first connector 67 of the LED board 6p adjacent to the LED board 6p.

  Further, the first connector 67 of the LED board 6p + 1 and the second connector 68 of the LED board 6p + 2 are connected by the wiring 21. Similarly, the first connector 67 of the LED board 6p + 2 and the second connector 68 of the LED board 6p + 3 are connected by the wiring 21, and the first connector 67 of the LED board 6p + 3 and the second connector of the LED board 6p + 4. 68 is connected by a wiring 21. Furthermore, the input terminal and the output terminal of the first connector 67 of the LED board 6p + 4 (that is, the connector located at one end in the X-axis direction in the second LED illumination circuit 20) are short-circuited by the wiring 21. Similarly, the input terminal and the output terminal of the second connector 68 of the LED board 6p (that is, the connector located at the other end in the X-axis direction in the second LED illumination circuit 20) are short-circuited by the wiring 21. Yes.

Thus, in the second LED lighting circuit 20, the second LED element circuits 62 of the LED substrates 6p + 1 to 6p + 4 are connected in series via the wiring 21, and the first LED element circuits 61 of the LED substrates 6p to 6p + 4 are also connected. They are connected in series via the wiring 21. And in the 2nd LED illumination circuit 20, an electric current flows in the direction shown by the arrow of FIG.
That is, the current output from the anode side of the second LED lighting device passes through the second LED element circuit 62 connected in series from the first wiring 72a toward the first connector 67 of the LED substrate 6p + 4. Flowing. The current output from the output terminal of the second connector 68 of the LED board 6p + 4 flows to the input terminal short-circuited to this output terminal. And it flows through the 1st LED element circuit 61 connected in series toward the 2nd connector 68 of LED board 6p from this input terminal. The current flowing through the first LED element circuit 61 located at the last stage of the first LED element circuits 61 connected in series (that is, disposed on the LED board 6p) 2 flows from the output terminal of the connector 68 to the input terminal short-circuited to the output terminal. Then, the second LED element circuit 62 of the LED substrate 6p flows from the input terminal, and then returns from the second wiring 72b to the cathode side of the second LED lighting device.

(4) LED lighting device FIG. 9 is a perspective view showing a configuration example of the first LED lighting device 71.
As shown in FIG. 9, the first LED lighting device 71 includes a housing 171 made of a material such as plastic, aluminum, or stainless steel, a power circuit accommodated in the housing 171, and an anode side of the power circuit. The first wiring 71a is connected, and the second wiring 71b is connected to the cathode side of the power supply circuit. The housing 171 is provided with a through hole 172 for passing a fastening component such as a screw, a lock pin, or a rivet. The casing 171 containing the power supply circuit is attached to the back surface of the support plate with the fastening parts being passed through the through holes 172.

  In addition, a lid 173 is attached to the housing 171, and a notch 174 is provided in a part of the lid 173. For example, the shape of the lid 173 in plan view is a rectangle, and a notch 174 is provided at the end on the long side of the center of the lid 173. The first wiring 71 a and the second wiring 71 b are drawn out from the inside to the outside of the housing 171 through the notch 174. In the first LED lighting device 71, the notch 174 is located in the vicinity of the through hole 53a shown in FIG. 7 and the like (for example, the notch 174 is located immediately below the through hole 53a). ), The mounting position with respect to the support plate is adjusted.

  The second LED lighting device 72 also has the same configuration as the first LED lighting device 71. In the second LED lighting device 72 as well, the cutout portion of the lid is positioned in the vicinity of the through hole 53b shown in FIG. 8 and the like (for example, the cutout portion is directly below the through hole 53b). The mounting position with respect to the support plate is adjusted.

(5) Reflective Sheet As shown in FIG. 2, the reflective sheet 8 is disposed on the main surface side of the support plate 51 of the heat sink 5 and continuously covers the plurality of LED substrates 6, and the heat sink. And a side surface reflection sheet that covers a side surface of the five side plates facing the main surface reflection sheet 81 side. For example, the side reflection sheet includes a first side reflection sheet 85 that covers a side surface of the first side plate 55 of the heat sink 5 facing the main surface reflection sheet 81 side, and a main surface reflection of the second side plate 56. A second side reflecting sheet 86 covering the side facing the sheet 81 side, a third side reflecting sheet 87 covering the side facing the main surface reflecting sheet 81 side of the third side plate 57, and It has the 4th side surface reflection sheet 88 which covers the side surface which has faced the main surface reflection sheet 81 side among the 4th side plates 58. The reflection sheet 8 is attached to the heat sink 5 by, for example, a lock pin or a push pin.

FIG. 10 is a plan view illustrating a configuration example of the main surface reflection sheet 81. Specifically, FIG. 10A is a plan view showing one main surface reflecting sheet 81, and FIG. 10B is a plan view showing a state in which end portions 81a of the two main surface reflecting sheets 81 are overlapped with each other. FIG.
In the main surface reflection sheet 81 shown in FIG. 10A, a first opening 82 that exposes only the LED elements 65 of the plurality of LED substrates 6 and a second opening that exposes both the LED elements 65 and the resistance elements 66 are provided. The opening 83 is provided. Further, as shown in FIGS. 2 and 10B, in this embodiment, two main surface reflection sheets 81 are arranged on the plurality of LED substrates 6 with their end portions 81a overlapped with each other. Thereby, the two main surface reflection sheets 81 continuously cover the plurality of LED substrates 6 that are arranged apart from each other.

The material of the reflection sheet 8 is, for example, polyethylene terephthalate (PET) or polypropylene (PP). Moreover, the surface of the reflection sheet 8 is, for example, white and has gloss. In addition, although there is no restriction | limiting in particular in the material of the reflection sheet 8, the color of a surface, and the presence or absence of glossiness, the light beam of the LED lighting apparatus 1 can be raised by using a thing with a high light reflectance.
In this embodiment, it is preferable that the main surface reflection sheet 81 and the first to fourth side surface reflection sheets 85 to 88 are separated from each other. A sheet in which the main surface reflection sheet 81 and the first to fourth side surface reflection sheets 85 to 88 are integrated may be attached to the heat sink 5. However, when a separate sheet is used, an improvement in pasting accuracy is expected. be able to. Moreover, when it is set as a separate sheet | seat, it is possible to change material and thickness with the main surface reflection sheet 81 and the 1st-4th side surface reflection sheets 85-88, and the design of the reflection sheet 8 is possible. There is an advantage that the degree of freedom is high. For example, the first to fourth side reflection sheets 85 to 88 are made of the hard material by configuring the first to fourth side reflection sheets 85 to 88 with respect to the main surface reflection sheet 81. It is also possible to stand on the surface 51a.

(6) Accommodation attachment part As shown in FIG. 2, the accommodation attachment part 3 reinforces the center part of the main body 31, the 1st side plate 32 and the 2nd side plate 33 which are attached to the both sides of the main body 31, and the main body 31. A reinforcing plate 34 and a spring bracket 35. The first side plate 32, the second side plate 33, and the reinforcing plate 34 are attached to the main body 31 by fastening parts such as screws, lock pins, or rivets. Further, of the end portions of the main body 31, the end portion to which the first side plate 32 or the second side plate 33 is not attached is bent toward the heat sink 5 so that the third side plate 36 and the fourth side plate 37 are connected. It is composed.

  The third side plate 36 and the fourth side plate 37 are provided with locking portions 36a and 37a for locking the spring bracket 35, respectively. Furthermore, the main body 31 and the reinforcing plate 34 are provided with through holes 31a and 34a for passing bolts. For example, when the LED lighting device 1 is attached to the ceiling of a building, a long bolt protruding from the ceiling toward the floor surface is prepared. The housing mounting portion 3 is fixed to the ceiling by passing this long bolt through the through holes 31a and 34a of the main body 31 and the reinforcing plate 34 and fixing them with nuts.

  FIG. 11 is a perspective view illustrating a configuration example of the housing mounting portion 3. Specifically, FIG. 11A is a perspective view showing a state in which the spring bracket of the accommodation mounting portion 3 is removed, and FIG. 11B is an enlarged view of the state where the spring bracket 35 of the accommodation mounting portion 3 is attached. It is the perspective view shown. As shown in FIG. 11A, the housing mounting portion 3 includes a recess 38 surrounded by the main body 31, the first side plate 32, the second side plate 33, the third side plate 36, and the fourth side plate 37. Have. The recess 38 is a space for accommodating the LED unit 2.

  When the LED unit is accommodated in the recess 38, as shown in FIG. 11B, the spring receiving bracket 35 is attached to the locking portions 36a and 37a facing the inside of the recess. In addition, a spring metal fitting 41 is attached to the outer side surface of the heat sink 5 constituting the LED unit in such a manner that the two arm portions 41a and 41b spread laterally (that is, spread in opposite directions to each other) by the elastic force of the spring. The attachment of the spring metal fitting 41 is performed using an attachment metal fitting 42 shown in FIG.

When the LED receiving unit is housed in the recess 38 with the spring receiving bracket 35 and the spring bracket 41 attached at predetermined positions and the back surface of the support plate of the heat sink is opposed to the recess 38 of the housing mounting portion 3, The portions 41 a and 41 b spread in the lateral direction by elastic force and are locked to the spring support fitting 35. As a result, the LED unit is housed and fixed in the recess 38 of the housing mounting portion 3.
Since the LED unit can be attached to and detached from the housing mounting portion 3 by expanding or narrowing the arm portions 41a and 41b of the spring metal fitting 41 in the lateral direction, for example, the LED unit 2 can be replaced.

(7) Cover Panel As shown in FIG. 2, the cover panel 9 includes a panel plate 91 having a rectangular planar shape and a frame body 92 attached to the outer peripheral portion of the panel plate 91. The panel plate 91 diffuses and transmits the light emitted from each LED element 65 (for example, see FIG. 3) of the LED substrate 6 and the light reflected by the reflection sheet 8. The panel plate 91 can reduce the feeling of light emission caused by a large number of LED elements, and can be made closer to surface emission. For example, in order to improve the above-mentioned smooth feeling, in the LED lighting device 1 after assembly, the distance from the LED element 65 to the panel plate 91 is 55 mm.

  The frame 92 supports the panel plate 91 and fixes it to the heat sink 5 side. The frame body 92 includes a first frame 95, a second frame 96, a third frame 97, and a fourth frame 98 that are disposed along four outer peripheral sides of the panel plate 91. And the edge part of each of these flame | frames is mutually connected, and the frame 92 is comprised. For this connection, a connecting member 99 is used.

(8) Correspondence In this embodiment, the heat sink 5 corresponds to the “support portion” of the present invention, the main surface 51a corresponds to the “first surface” of the present invention, and the back surface 51b corresponds to the “second” of the present invention. It corresponds to "the side of". The X-axis direction corresponds to “one direction” in the present invention. Further, one of the first connector 67 and the second connector 68 corresponds to the “first connection terminal” of the present invention, and the other corresponds to the “second connection terminal” of the present invention. One of the first long side L1 and the second long side L2 corresponds to the “first side” of the present invention, and the other corresponds to the “second side” of the present invention. Yes.

In the first LED lighting circuit 10, the LED substrates 6 _m and 6 _{m + 1} correspond to the “LED substrate adjacent to the through hole” of the present invention. One of the LED substrates 6 _m and 6 _{m + 1} corresponds to the “first LED substrate” of the present invention, and the other corresponds to the “second LED substrate”. Further, the second connector 68 included in the LED board 6 _{m + 4} corresponds to the “connecting terminal located at one end (in one direction)” of the present invention (the first connector 67 included in the LED board 6 _{m includes} It corresponds to the connection terminal located at the other end in one direction.) The through hole 53a corresponds to the “through hole” of the present invention.

In the second LED lighting circuit 20, the LED substrates 6 _p and 6 _{p + 1} correspond to the “LED substrate adjacent to the through hole” of the present invention. In addition, one of the LED substrates 6 _p and 6 _{p + 1} corresponds to the “first LED substrate” of the present invention, and the other corresponds to the “second LED substrate”. Furthermore, the first connector 67 included in the LED board 6 _{p + 4} corresponds to the “connecting terminal located at one end (in one direction)” of the present invention (the second connector 68 included in the LED board 6 _{p includes} It corresponds to the connection terminal located at the other end in one direction.) The through hole 53b corresponds to the “through hole” of the present invention.

<Effect of embodiment>
The embodiment of the present invention has the following effects.
(1) The plurality of LED boards 6 are arranged apart from each other in the X-axis direction, and the adjacent LED boards 6 are connected by wiring to form the first LED lighting circuit 10 and the second LED lighting circuit 20. ing. Thereby, since the usage-amount of a base material can be reduced compared with the case where an LED illumination circuit is comprised with one continuous LED board, it can contribute to reduction of manufacturing cost.

(2) Moreover, in the 1st LED lighting circuit 10, the 1st wiring 71a which connects the anode side of the 1st LED lighting device 71 to the 1st LED lighting circuit 10, and the 1st LED lighting device 71 The second wiring 71b that connects the cathode side of the first LED lighting circuit 10 to the first LED illumination circuit 10 is led out from the back surface 51b side of the support plate 51 to the main surface 51a side through the through hole 53a. The LED boards 6 _m and 6 _{m + 1} adjacent to the through hole 53a are connected to the LED board 6 _m and 6 _{m + 1} respectively.

Similarly, also in the 2nd LED lighting circuit 20, the 1st wiring 72a which connects the anode side of the 2nd LED lighting device 72 to the 2nd LED lighting circuit 20, and the cathode of the 2nd LED lighting device 72 The second wiring 72b connecting the side to the second LED lighting circuit 20 is drawn from the back surface 51b side of the support plate 51 through the through hole 53b to the main surface 51a side, and the through hole of the plurality of LED substrates 6 The LED boards 6 _p and 6 _{p + 1} adjacent to 53b are respectively connected.

  Thereby, each wiring length of a 1st, 2nd wiring can be shortened, respectively, and since the usage-amount of a wiring material can be suppressed, it can contribute to reduction of manufacturing cost.

(3) Further, in the first LED lighting circuit 10, a first connector 67 of the LED substrate _{6 m,} and the second connector 68 of the LED substrate _{6 m + 1} is adjacent to the through hole 53a. Similarly, in the second LED lighting circuit 20, a first connector 67 of the LED substrate _{6 p,} a second connector 68 of the LED substrate _{6 p + 1} is adjacent to the through hole 53b.
As a result, the distance from the through hole to each connector (to which the first and second wirings are connected) can be made shorter (ideally the shortest), so the wiring of the first and second wirings The amount of material used can be further suppressed.

(4) Moreover, in the 1st LED lighting circuit 10, the notch part 174 of the cover 173 of the 1st LED lighting device 71 is located in the vicinity of the through-hole 53a (for example, the notch part 174 penetrates). The mounting position of the first LED lighting device 71 with respect to the support plate 51 is adjusted so as to be positioned directly below the hole 53a. Similarly, in the second LED lighting circuit 20, the notch portion of the lid of the second LED lighting device 72 is positioned in the vicinity of the through hole 53 b (for example, the notch portion is directly below the through hole 53 b. The mounting position of the second LED lighting device 72 with respect to the support plate 51 is adjusted. Thereby, since the distance from a notch part to a through-hole can be shortened (ideally, the shortest), the usage-amount of the wiring material of a 1st, 2nd wiring can further be suppressed. .

(5) Since the lengths of the first wires 71a and 72a and the second wires 71b and 72b can be shortened on the back surface 51b side of the support plate 51, the LED unit 2 can be accommodated in the housing mounting portion 3. When attached to (or removed from) the operator, the operator's finger can be less likely to touch the first and second wirings. As a result, it is possible to prevent the operator's finger from being entangled with the first and second wires and the operator's finger from pulling the first and second wires. It is possible to contribute to the improvement of workability of removal.

In particular, in the above embodiment, the first LED lighting device 71 and the second LED lighting device 72 are attached to the back side of the central portion of the support plate 51, and support the through holes 53 a and 53 b of the support plate 51. A central portion of the plate 51 is provided. When attaching (or removing) the LED unit, it is assumed that the operator supports the outer periphery of the support portion by hand, but the first and second wirings are arranged near the center portion of the support plate. Therefore, the first and second wirings are difficult to reach structurally.
As described above, in the above embodiment, the first and second wiring lengths are short, and the first and second wirings are difficult to reach due to the structure. Thereby, it can contribute greatly to the improvement of workability of attachment (or removal) of the LED unit.

(6) Moreover, in the 1st LED lighting circuit 10, the wiring length of the 1st wiring 71a and the 2nd wiring 71b can be shortened, respectively. Similarly, in the second LED lighting circuit 20, the wiring lengths of the first wiring 72a and the second wiring 72b can be shortened, respectively. Thereby, high frequency noise can be reduced.

<Modification>
(1) In the above embodiment, the case where the LED lighting device 1 includes the first LED lighting circuit 10 and the second LED lighting circuit 20 has been described. However, the present invention is not limited to this. The LED lighting device 1 may have only one of the first LED lighting circuit 10 and the second LED lighting circuit 20. Even with such a configuration, the same effects as the effects (1) to (4) and (6) of the above-described embodiment are obtained.

(2) Moreover, in said embodiment, the case where each of the through-holes 53a and 53b of the support plate 51 was located between a pair of LED board 6 adjacent in planar view was demonstrated. However, the present invention is not limited to this.
FIG. 12 is a plan view schematically showing a configuration of the first LED lighting circuit 10A and a current flow, which is a modification of the first LED lighting circuit 10. As shown in FIG. As shown in FIG. 12, the through hole 53a of the support plate may be located at the other end of the row of the plurality of LED substrates 6 arranged in the X-axis direction in plan view.

For example, the through hole 53a is of a LED substrate _{6 m,} may be located on the opposite side of the LED substrate _{6 m + 1} and the adjacent side. And both the 1st wiring 71a and the 2nd wiring 71b of the 1st LED lighting device may be connected to the 1st connector 67 of LED board 6m. Even with such a configuration, the same effects as the effects (1) to (4) and (6) of the above-described embodiment are obtained. Although not shown, the same modification may be applied to the second LED illumination circuit 20 as well.

(3) Moreover, in said embodiment, you may affix an elastic protective tape etc. on the inner surface of the through-holes 53a and 53b of the support plate 51, or the edge of an opening end. Moreover, you may protect the 1st, 2nd wiring with a heat contraction tube. As a result, the first and second wirings can be prevented from coming into direct contact with the inner surface of the through hole and the edge of the opening end, and the possibility of disconnection due to rubbing against these portions is sufficiently reduced. Can do.

(4) In the above embodiment, the case where the planar shape of the through holes 53a and 53b of the support plate 51 is rectangular is illustrated, but the present invention is not limited to this. The planar shape of the through holes 53a and 53b may be a rounded rectangle, an ellipse, or a perfect circle. In any case, the same effects as the effects (1) to (6) of the above-described embodiment are obtained.

(5) Further, in the above embodiment, as shown in FIG. 10B, the end portions 81a of the two main surface reflection sheets 81 are overlapped with each other, and the main surface 51a side of the support plate 51 is continued. The case of covering is described. However, the present invention is not limited to this.
The main surface reflection sheet that continuously covers the main surface 51a side of the support plate 51 is not two sheets, but a single main surface reflection sheet (that is, a size larger than the main surface reflection sheet 81 shown in FIG. 10A). For example, a main surface reflection sheet having an area approximately twice as large. Alternatively, the main surface reflecting sheet that continuously covers the main surface 51a side of the support plate 51 is not two, but three or more main surface reflecting sheets (that is, the main surface reflecting sheet 81 shown in FIG. 10A). Also, the main surface reflection sheet having a small size may be configured such that the end portions overlap each other. In either case, the luminous flux of the LED lighting device 1 can be increased.

<Others>
The present invention is not limited to the embodiments and modifications described above. Based on the knowledge of those skilled in the art, design changes and the like may be added to the embodiments and modifications, and the modifications may be arbitrarily combined, and embodiments in which such modifications are added are also within the scope of the present invention. included.

  As an embodiment of the present invention, the light flux, the area of the heat sink, the size of the LED substrate, and the distance between the LED substrates are shown for each panel diameter. The panel diameter is the diameter (length of one side in the vertical and horizontal directions) of the panel plate 91 of the cover panel 9 shown in FIG. The area of the heat sink means the area of the support plate 51 of the heat sink 5 shown in FIG.

DESCRIPTION OF SYMBOLS 1 LED lighting apparatus 2 LED unit 3 Housing attachment part 5 Heat sink 6 LED board 6a 1st area | region 6b 2nd area | region 7 LED lighting device 8 Reflective sheet 9 Panel board 9 Cover panel 10, 10A 1st LED illumination circuit 11, 21 Wiring 20 Second lighting circuit 31 Main body 31a Through hole 32 First side plate 33 Second side plate 34 Reinforcement plate 35 Spring receiving bracket 36 Third side plate 36a, 37a Locking portion 37 Fourth side plate 38 Recess 41 Spring Bracket 41a, 42b Arm portion 42 Mounting bracket 51 Support plate 51a Main surface 51b Back surface 53a, 53b Through hole 54 Cut portion 55 First side plate 56 Second side plate 57 Third side plate 58 Fourth side plate 59 Fastening component 61 First LED element circuit 61a, 62a 1st LED element group 61b, 62b 2nd LED element group 61c, 62c 3rd LED element 61d, 62d Fourth LED element group 61e, 62e Fifth LED element group 62 Second LED element circuit 63 Conductive layer 64 Protective layer 65 LED element 66 Resistive element 67 First connector 67a First female hole 67b First Second female hole 67c First pin terminal 67d Second pin terminal 68 Second connector 69 Through hole 71 First lighting device 71a, 72a First wiring 71b, 72b Second wiring 72 Second lighting device 81 Main surface reflection sheet 81a End portion 82 First opening 83 Second opening 85 First side reflection sheet 86 Second side reflection sheet 87 Third side reflection sheet 88 Fourth side reflection sheet 91 Panel Plate 92 Frame 95 First frame 96 Second frame 97 Third frame 98 Fourth frame 99 Connecting member 171 Housing 172 Through hole 173 Lid 174 Cutting Out portions

Claims (8)

A support portion having a first surface and a second surface located opposite to the first surface, wherein a through hole is provided between the first surface and the second surface;
A plurality of LED substrates provided on the first surface side;
An LED lighting device provided on the second surface side,
The plurality of LED boards are arranged in one direction apart from each other, and adjacent LED boards are connected by wiring to constitute an LED illumination circuit,
A first wiring for connecting the LED lighting equipment to the LED lighting circuit, and a second wiring connecting the LED lighting equipment to the LED lighting circuit, the through hole from the second face side Each of the plurality of LED substrates is connected to an LED substrate adjacent to the through hole ,
The LED substrate has a plurality of LED elements, a conductive layer connecting the plurality of LED elements, and a first connection terminal and a second connection terminal connected to the conductive layer,
The shape of the LED substrate in plan view is rectangular,
The first connection terminal is disposed on the first side of the LED substrate,
The second connection terminal is disposed on a second side facing the first side of the LED substrate,
Of the first connection terminal and the second connection terminal of the LED substrate adjacent to the through hole, the first wiring and the second wiring are connected to the connection terminal closer to the through hole. Has been
As the LED substrate adjacent to the through hole, in plan view, the first LED substrate and the second LED substrate located on both sides of the through hole,
Of the first connection terminal and the second connection terminal of the first LED substrate, the first wiring is connected to a connection terminal on the side close to the through hole,
Of the first connection terminal and the second connection terminal of the second LED substrate, the second wiring is connected to a connection terminal closer to the through hole. Lighting device. In the pair of LED substrates adjacent in the one direction among the plurality of LED substrates, the first connection terminal of one LED substrate and the second connection terminal of the other LED substrate are adjacent in the one direction. The LED lighting device according to claim 1 , wherein the adjacent connection terminals are connected by the wiring. Among all the first connection terminals and the second connection terminals that the plurality of LED boards have, a connection terminal located at at least one end portion in the one direction has an input terminal and an output terminal of the connection terminal. LED lighting device according to claim 1 or claim 2 characterized in that it is short-circuited. The LED substrate is in plan view,
A first LED element circuit disposed in a first region of the LED substrate;
A second LED element circuit disposed in a second region of the LED substrate,
Between at least some of the LED substrates, the first LED element circuit is connected in series via the wiring, and the second LED element circuit is also connected in series via the wiring. Connected,
Current output the LED lighting instrumentation placed et al.,
From the first wiring toward the connection terminal located at the one end, the first LED element circuit connected in series flows,
From the connection terminal located at the one end to the second wiring, the second LED element circuit connected in series flows,
LED lighting device according to claim 3, characterized in that return to the LED lighting equipment. The current that flows through the second LED element circuit located at the last stage among the second LED element circuits connected in series is then the same LED substrate as the second LED element circuit at the last stage. 5. The LED lighting device according to claim 4 , wherein the LED lighting device flows through the first LED element circuit at the last stage provided to the LED lighting device and then returns to the LED lighting device. A plurality of the LED lighting circuits;
In each of the plurality of LED lighting circuit, connection terminals positioned in at least one end portion of said one direction, according to claim 4 or claim, characterized in that the input terminal of the connection terminals and the output terminals are short-circuited 5. The LED lighting device according to 5 . Each of the first connecting terminal and the second connecting terminals from claim 1, characterized in that a 2-pin type connector terminal having an input terminal and an output terminal to one of claims 6 LED lighting apparatus of description. The LED illumination device according to any one of claims 1 to 7 , wherein the through hole is provided between LED substrates adjacent in the one direction in a plan view.

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