JP2014082067A - Lighting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting device which widens a mounting area that is effective for mounting of semiconductor light emitting elements on a substrate and thereby allows many semiconductor light emitting elements to be mounted.SOLUTION: A lighting device 10 includes a device body 11 having a device attachment part 17 at its center part and uses a light emitting unit A having LED elements 35 and a substrate 12 on which the LED elements 35 are mounted. The substrate 12 is disposed around a device attachment part 17 at the front surface side of the device body 11. Multiple positions of the substrate 12 are pressed to the device body 11 by multiple resin pressing members.

Description

  Embodiments described herein relate generally to a lighting fixture using a semiconductor light emitting element.

  Conventionally, in a lighting fixture such as a ceiling light, for example, a lighting circuit is arranged around the fixture mounting portion with respect to the fixture main body provided with a fixture mounting portion in the center, and the fixture is positioned on the outer diameter side of the lighting circuit. A substrate on which a plurality of LED elements are mounted is disposed on the periphery of the main body.

  When attaching the board to the instrument body, use multiple metal screws on the instrument body to efficiently conduct heat generated by the LED elements from the board to the instrument body to improve heat dissipation. It is common to install.

JP 2011-134684 A

  In such a lighting fixture, for example, when an inexpensive relatively low-power LED element is used instead of an expensive high-power LED element, the number of LED elements is set to ensure a desired brightness. In this case, it is preferable to increase the effective mounting area for mounting the LED elements on the substrate.

  However, in the conventional lighting fixture, the lighting fixture is increased in size on the outer diameter side of the substrate, and the lighting circuit is disposed on the inner diameter side of the substrate. Since a metal screw is used to attach to the fixture body, the effective mounting area for mounting the LED element on the substrate is limited in order to secure an insulation distance from the screw.

  The problem to be solved by the present invention is to provide a luminaire capable of widening a mounting area effective for mounting semiconductor light emitting elements on a substrate and mounting many semiconductor light emitting elements.

  The lighting fixture of the embodiment includes a fixture main body having a fixture mounting portion in the center. A light emitting unit having a semiconductor light emitting element and a substrate on which the semiconductor light emitting element is mounted is used. A board | substrate is arrange | positioned around the instrument attachment part on the front side of an instrument main body. A plurality of portions of the substrate are pressed against the instrument body by a plurality of resin pressing members.

  According to the present invention, by pressing the substrate to the instrument body by the resin pressing member, it is possible to ensure heat dissipation to the instrument body by regulating the warpage of the substrate, and there is no problem of the insulation distance from the pressing member. It can be expected that the mounting area effective for mounting the semiconductor light emitting element on the substrate can be increased, and a large number of semiconductor light emitting elements can be mounted.

It is sectional drawing of the lighting fixture which shows one Embodiment. It is sectional drawing which shows the attachment structure of the protective cover of a lighting fixture same as the above. It is a perspective view of the fixture main body which attached the board | substrate and protective cover of the lighting fixture same as the above. It is a perspective view of the fixture main body and protective cover which attached the board | substrate of the lighting fixture same as the above. It is a perspective view of the decomposition | disassembly state of a lighting fixture same as the above.

  Hereinafter, an embodiment will be described with reference to FIGS. 1 to 5.

  As shown in FIGS. 4 and 5, the lighting fixture 10 is a circular ceiling light that is attached to a hook ceiling installed on the ceiling surface via an adapter. The direction in which light is emitted from the lighting fixture 10 is referred to as the front side, and the opposite side to the front side is referred to as the back side. The front side and the back side correspond to the lower side and the upper side of the installed lighting fixture 10. .

  The lighting fixture 10 includes a fixture main body 11. A module substrate or a main substrate 12 of the light emitting unit A, a protective cover 13, and a shade 14 are attached to the front side of the fixture main body 11. Case 16 is attached. The case 16 is provided with an appliance mounting portion 17 and a lighting circuit 18 as adapter guides.

  The instrument body 11 is made of metal and has a disk shape. An opening 21 into which the instrument mounting portion 17 is fitted is formed at the center of the instrument body 11, and a planar substrate mounting portion 22 to which the substrate 12 is attached is formed in an annular shape around the opening 21 on the front surface of the instrument body 11. In addition, a recess 23 that protrudes toward the back surface is formed in an annular shape in the peripheral portion of the substrate mounting portion 22, and a flange portion 24 is formed in an annular shape in the peripheral portion of the recess 23.

  As shown in FIG. 1, the board mounting portion 22 is formed at an intermediate position in the radial direction, for example, by drawing to the back side of the instrument body 11 so as to open to the board mounting portion 22 side and annularly along the circumferential direction. A protruding portion 25 is formed. A screw hole 26 for attaching the case 16 with a screw (not shown) is formed at the top of the protruding portion 25. Further, as shown in FIGS. 4 and 5, a window hole 27 is formed between the projecting portion 25 and the opening 21, and the instrument body 11 is located at a symmetrical position with respect to the window hole 27 with the opening 21 as the center. A recess 28 is formed that protrudes toward the back side and is recessed on the front side. A portion of the window hole 27 and the recessed portion 28 on the outer diameter side is located in the region of the board mounting portion 22. As shown in FIGS. 2 and 5, a plurality of mounting holes 29 for mounting the substrate 12 are arranged along the circumferential direction on the outer peripheral side and the inner peripheral side of the substrate mounting portion 22.

  As shown in FIGS. 1 and 4, a plurality of claw insertion holes 30 for locking and attaching the protective cover 13 are formed on the outer peripheral side of the board attaching portion 22. A plurality of screw holes 31 for attaching the protective cover 13 with screws (not shown) are formed on the inner peripheral side of the board attaching portion 22.

  As shown in FIGS. 4 and 5, a plurality of shade attachment fittings 32 are attached to the recess 23 to removably attach the shade 14 by rotating the shade 14 relative to the instrument body 11. The seed mounting bracket 32 does not protrude from the board mounting portion 22 but is accommodated in the recess 23.

  The substrate 12 of the light emitting unit A is divided and formed in a semi-annular shape, and the pair of substrates 12 are combined in an annular shape by attaching the pair of substrates 12 to the substrate attaching portion 22 of the instrument body 11. The substrate 12 is made of, for example, paper phenol, and the outer peripheral side of the substrate 12 is arranged on the outer diameter side of the lighting circuit 18 (circuit board), and the inner peripheral side of the substrate 12 is the front area of the lighting circuit 18 (circuit board). The dimension of the substrate 12 in the radial direction is large so as to be disposed so as to overlap with each other, and as a result, the area of the substrate 12 is formed wide. The material of the substrate 12 is not limited to paper phenol, and other substrate materials such as metal, ceramics, or resin may be used.

  The front side of the substrate 12 is a mounting surface. A wiring pattern is formed, and a plurality of semiconductor light emitting elements including LED elements, organic ELs, and the like are mounted on the concentric circles connected to the wiring pattern. In the present embodiment, a surface mount type SMD package type LED element 35 is used as the semiconductor light emitting element, and a plurality of LED elements 35 are arranged on the substrate 12 at equal intervals along the circumferential direction and are concentrically arranged. Are arranged in multiple rows. 4 and 5 show only two rows of the outer peripheral side and the inner peripheral side as the rows of the LED elements 35, but the other rows are not shown, as shown in FIG. 1 and FIG. In addition, two rows of LED elements 35 are arranged between the outer peripheral side and the inner peripheral side, and a total of four rows are arranged. However, the number of columns of the LED elements 35 is not limited to four, and may be two, three, or five or more. In any arrangement form when the LED elements 35 are mounted on such a substrate 12, the LED elements 35 mounted on the substrate 12 are not arranged in a region facing the protruding portion 25 of the instrument body 11, It is arranged at a position outside the region. In addition, the light emitting portion of the LED element 35 is directed in the opposite direction with respect to the substrate 12 and in the downward direction when the lighting fixture 10 is installed. Further, a reflective surface having a high reflectance characteristic is formed on the front side of the substrate 12 so as to cover the wiring pattern.

  A notch 36 is formed on the inner peripheral side of the pair of substrates 12 facing each other, corresponding to the positions of the window hole 27 and the recess 28 of the instrument body 11. In addition, a connector 37 connected to the wiring pattern is mounted in the vicinity of the opposing edges of the pair of substrates 12.

  The divided substrates 12 have a common configuration, and the same substrate is used.

  As shown in FIG. 4, one connector 37 of the pair of substrates 12 facing each other is electrically connected to each other by a connecting member 40 having connectors 39 connected to both ends of the electric wire 38. In addition, a pair of power feeding members 43 each having a connector 42 connected to the tip of the electric wire 41 are electrically connected to the other connector 37 of the pair of substrates 12 facing each other. The electric wires 41 of each power supply member 43 are wired from the space between the substrates 12 to the instrument body 11 side, and are electrically connected to the lighting circuit 18 through wiring holes (not shown) formed in the instrument body 11. The electric wire 41 of the power supply member 43 may be wired using the space inside the protruding portion 25 of the instrument body 11 as a wiring space.

  On the outer peripheral side and the inner peripheral side of the substrate 12, there are formed a plurality of insertion holes 44 that are long holes along the radial direction and open to the outer peripheral side and the inner peripheral side, respectively. Each insertion hole 44 is formed corresponding to the position of each attachment hole of the instrument main body 11, and as shown in FIG. 2, the substrate 12 is formed by a plurality of pressing members 45 using the insertion holes 44 and the attachment holes 29. Is pressed and attached to the instrument body 11.

  The pressing member 45 is made of resin, and for example, a stopper such as a bush rivet is used. In the case of bush rivets, each comprises a resin sleeve 46 and a pin 47. The distal end side 46a of the sleeve 46 is inserted into the insertion hole 44 and the mounting hole 29, and the flange portion 46b on the proximal end side is formed on the substrate 12. When the pin 47 is press-fitted into the sleeve 46 in contact with the front side of the sleeve 46, the distal end side 46a of the sleeve 46 opens in the outer diameter direction and presses against the edge on the back side of the mounting hole 29. The substrate 12 and the instrument body 11 are sandwiched and stopped between the front end side 46a and the flange portion 46b. There is a gap at least in the radial direction of the substrate 12 between the pressing member 45 and the insertion hole 44 of the substrate 12, and movement of the substrate 12 due to thermal expansion or the like is allowed. Note that the pressing member 45 is not limited to a push rivet, and a stopper having another configuration capable of pressing the substrate 12 against the instrument body 11 may be used.

  Further, the protective cover 13 is made of a transparent resin having light transmittance and diffusibility, and is formed in an annular shape having an opening 50 at the center. The protective cover 13 has a ring-shaped cover portion 51 that is large enough to cover the substrate 12 between the instrument main body 11 and is formed in a cross-sectional curved shape so that the central region protrudes to the front side. .

  As shown in FIG. 1, the outer peripheral side and the inner peripheral side of the back surface of the protective cover 13 are in contact with the inner peripheral side and the outer peripheral side of the front surface of the substrate 12 to press the substrate 12 against the instrument body 11. The presser portions 52 and 53 are formed. The outer periphery side pressing part 52 is formed by an annular rib, and the inner periphery side pressing part 53 is formed by an annular stepped part. On the outer peripheral surface side and the inner peripheral surface side of the substrate 12, the holding portions 52 and 53 are not positioned, and a space portion S that allows the substrate 12 to move in the radial direction due to, for example, thermal deformation is formed.

  As shown in FIG. 2, on the back side of the protective cover 13, the presser members 45 are restricted from dropping from the insertion holes 44 and the mounting holes 29 in accordance with the positions of the presser members 45. A holding portion 54 is formed to hold a state in which the substrate 12 and the instrument body 11 are sandwiched.

  As shown in FIG. 1 and FIG. 4, a plurality of claw portions 55 that can be inserted into the claw insertion holes 30 of the instrument main body 11 are integrally formed on the outer peripheral side on the back side of the protective cover 13. The plurality of claw portions 55 are formed in a substantially L shape toward the mounting rotation direction which is one of the circumferential directions of the protective cover 13. Then, by inserting each claw portion 55 into each claw insertion hole 30 of the instrument body 11 and rotating the protective cover 13 in the mounting rotation direction, the tip of each claw portion 55 rides on the back side of the instrument body 11 The protective cover 13 is pulled toward the instrument body 11 and each claw 55 is caught on the back side of the instrument body 11 so that the substrate 12 is sandwiched between the holding parts 52 and 53 of the protection cover 13 and the instrument body 11. In this state, the protective cover 13 is fixed to the instrument body 11.

  A plurality of insertion holes 56 are formed in the inner peripheral portion of the protective cover 13 corresponding to the positions of the mounting holes 29 of the instrument body 11. When the screw (not shown) is screwed into the mounting hole 29 of the instrument body 11 from the insertion hole 56, the protective cover 13 is tightened to the instrument body 11, and the presser portions 52 and 53 of the protection cover 13 and the instrument body 11 are The protective cover 13 is fixed to the instrument body 11 with the substrate 12 sandwiched therebetween.

  Further, as shown in FIG. 5, the shade 14 is made of a translucent milky white resin, the upper surface side is opened, and an attachment step portion (not shown) attached to each of the shade attachment brackets 32 on the inner peripheral edge portion on the upper surface side. ) Is formed. The shade 14 attached to the instrument main body 11 integrally covers the lower surface of the instrument main body 11, the substrate 12, the protective cover 13, and the like.

  As shown in FIGS. 1 and 5, the case 16 is made of metal and has an opening 59 in which the instrument mounting portion 17 is disposed at the center, around the side wall portion protruding from the peripheral portion to the front side. A flange portion 60 is formed, and the flange portion 60 is screwed and attached to the protruding portion 25 of the instrument body 11. The flange portion 60 is formed with an insertion hole 61 through which a screw is inserted corresponding to the position of each screw hole 26 of the protruding portion 25. In the case 16, a housing space 62 is formed between the upper surface of the device body 11 and the device mounting portion 17 and the lighting circuit 18 are received and attached. The back surface of the case 16 is compressed with the ceiling surface when the lighting device 10 is installed on the ceiling surface to prevent rattling of the lighting device 10 and to prevent the lighting device 10 from rotating. A cushion material 63 is attached.

  In addition, as shown in FIG. 5, the fixture mounting portion 17 is made of resin and is formed into a cylindrical shape, and is detachably attached to the adapter by being fitted into an adapter mounted on a hook ceiling installed on the ceiling surface. It is done. In the fixture mounting portion 17, a nightlight mounting portion 66 is formed so as to be opposed to the window hole 27 of the fixture body 11, and a nightlight substrate 67 is attached to the nightlight mounting portion 66.

  As shown in FIG. 3, the nightlight board 67 is mounted with a nightlight element 68 made of, for example, an LED element, a remote control light receiving unit (not shown), and a remote control changeover switch 69. The nightlight element 68 is covered with a milky white diffusion cover 70 to form a nightlight 71. In the diffusion cover 70, the remote control light receiving part is also covered, but the remote control changeover switch 69 is not covered. The remote control light receiving unit receives a signal transmitted by an infrared medium from a remote control that remotely controls the lighting state of the lighting fixture 10, and outputs this signal to the lighting circuit 18. The remote control changeover switch 69 is used for switching a remote control signal for associating the remote control with the lighting fixture 10 remotely operated by the remote control.

  The nightlight 71 and the remote control switch 69 mounted on the nightlight board 67 are disposed in the window hole 27 of the instrument body 11. A night light 71 is mounted on the outer diameter side of the window hole 27, and a remote control changeover switch 69 is disposed on the inner diameter side of the window hole 27. Since the outer diameter side of the window hole 27 is arranged in the area of the board mounting portion 22, the nightlight 71 is also arranged at the position of the board mounting section 22, that is, the position invading the inner area of the board 12 from the inner peripheral side of the board 12. The remote control switch 69 is arranged outside these areas. Therefore, the nightlight 71 is covered together with the substrate 12 by the protective cover 13 covering the substrate 12. The remote control changeover switch 69 is located outside the protective cover 13 and is not covered.

  Further, as shown in FIG. 5, the lighting circuit 18 includes a circuit board 74 disposed around the fixture mounting portion 17 and fixed to the case 16 side, and the lighting circuit 18 is configured on the circuit board 74. Various electronic components are mounted. Commercial AC power is input to the power input side of the lighting circuit 18 through an adapter and hook ceiling, and the power output side of the lighting circuit 18 is connected to the plurality of LED elements 35 through the power supply member 43, the wiring pattern of the substrate 12, and the connection member 40. It is connected to the. Then, the lighting circuit 18 rectifies and smoothes the AC power, converts it to a predetermined DC power, and supplies it to the LED element 35.

  Next, in order to assemble the lighting fixture 10, the case 16 to which the fixture mounting portion 17 and the lighting circuit 18 are attached is screwed to the upper surface of the fixture body 11.

  After placing the substrate 12 on the substrate mounting portion 22 of the instrument body 11 and electrically connecting the connection member 40 and the power feeding member 43 to the substrate 12, the insertion hole 44 of the substrate 12 and the attachment hole 29 of the instrument body 11 are connected. The pressing member 45 is inserted, and the substrate 12 and the instrument body 11 are sandwiched and stopped by the pressing member 45.

  By covering the protective cover 13 so as to cover the substrate 12, each claw portion 55 of the protective cover 13 is inserted into each claw insertion hole 30 of the instrument body 11, and the protective cover 13 is rotated in the mounting rotation direction. The tip of each claw portion 55 rides on the back side of the instrument body 11 and draws the protective cover 13 toward the instrument body 11. Further, the screw is screwed into the screw hole 31 of the instrument body 11 through the insertion hole 56 of the protective cover 13 and fastened and fixed. As a result, the holding portions 52 and 53 of the protective cover 13 come into contact with the outer peripheral side and the inner peripheral side of the front surface of the substrate 12 and press the substrate 12 against the instrument body 11.

  The shade 14 is placed on the instrument body 11 so as to cover the substrate 12, the protective cover 13, and the like, and is rotated in a predetermined mounting rotation direction, so that the shade 14 is attached to the shade mounting bracket 32.

  Note that the assembly order of the lighting fixtures 10 is not limited to such an order.

  And in order to install the lighting fixture 10, the fixture attachment part 17 of the lighting fixture 10 which removed the shade 14 is attached to the adapter previously mounted | worn with the ceiling ceiling ceiling. The wiring led out from the adapter is connected to the lighting circuit 18 side, and the hooking ceiling and the lighting circuit 18 are electrically connected. Attach the shade 14 to the instrument body 11.

  When installing the luminaire 10, when switching the remote control signal to correspond the remote controller and the luminaire 10 remotely operated by this remote controller, switch the remote control switch 69 that is not covered by the protective cover 13 Good.

  Then, when the commercial AC power is supplied to the lighting circuit 18, the lighting power is supplied from the lighting circuit 18 to the plurality of LED elements 35, and the plurality of LED elements 35 are lit.

  The light generated by the plurality of LED elements 35 passes through the protective cover 13 and enters the shade 14, is diffused by the shade 14, and is irradiated onto the illumination space.

  Further, the heat generated by the LED element 35 is conducted from the back side of the substrate 12 to the instrument body 11 and is efficiently radiated from the instrument body 11. On the other hand, the heat generated by the lighting circuit 18 is transmitted to the case 16 and efficiently radiated from the case 16. Therefore, the heat generated by the LED element 35 and the heat generated by the lighting circuit 18 are unlikely to interfere with each other, and the heat generated by each can be efficiently radiated.

  The lighting state can be switched by remote control operation. When only the night light 71 is turned on, the light generated by the night light element 68 is diffused by the diffusion cover 70, passes through the protective cover 13 and the shade 14, and is irradiated to the illumination space. At this time, since the night light 71 is covered with the LED element 35 with a uniform surface having no irregularities or corners in the surface direction of the protective cover 13, no bright line is generated and the bright line is reflected on the shade 14. Can be prevented.

  In the lighting fixture 10 configured in this way, the substrate 12 is arranged such that the outer peripheral side of the substrate 12 is disposed on the outer diameter side from the lighting circuit 18 and the inner peripheral side of the substrate 12 is disposed so as to overlap the front region of the lighting circuit 18. After the area of 12 is increased, by pressing the substrate 12 to the instrument body 11 by the resin pressing member 45, even if the area of the substrate 12 is large and formed with, for example, paper phenol, warping is likely to occur. Heat dissipation can be ensured by regulating the warpage of the substrate 12 and improving the adhesion to the instrument body 11, and there is no problem of the insulation distance with the holding member 45, which is effective for mounting the LED element 35 on the substrate 12. The mounting area can be increased, and a large number of LED elements 35 can be mounted.

  Therefore, for example, when forming a lighting fixture 10 with a small diameter, or when forming a lighting fixture 10 that uses a large number of inexpensive, relatively low-power LED elements 35, the mounting area of the substrate 12 can be increased and the brightness can be increased. It is possible to mount as many LED elements 35 as necessary to ensure the thickness.

  By pressing the outer peripheral side and inner peripheral side of the substrate 12 against the instrument body 11 by the holding portions 52 and 53 of the protective cover 13 that covers the substrate 12 and is attached to the instrument body 11, warping of the substrate 12 having a large area is regulated. Thus, the adhesion to the instrument body 11 can be improved and heat dissipation can be ensured.

  The protective cover 13 having the holding parts 52 and 53 can allow movement due to thermal expansion of the substrate 12 by securing a space S that allows the substrate 12 to move in the radial direction, and the substrate 12 is loaded. Can be prevented and damage to the wiring pattern itself and the solder connection portion between the wiring pattern and the LED element 35 can be prevented.

  The holding member 54 of the protective cover 13 covering the substrate 12 restricts the pressing member 45 from falling off the insertion hole 44 and the mounting hole 29, and holds the state in which the substrate 12 and the instrument body 11 are sandwiched by the pressing member 45. it can.

  By increasing the area of the substrate 12, it becomes difficult to secure a wiring space for connecting the substrate 12 and the lighting circuit 18 on the inner peripheral side of the substrate 12, but the substrate 12 and the lighting circuit 18 are connected. Wiring can be easily performed by passing the electric wires 41 of the power supply member 43 between the divided substrates 12.

  In addition, since the LED element 35 mounted on the substrate 12 is disposed at a position away from the region of the protrusion 25 of the instrument body 11, the heat generated by the LED element 35 is efficiently transmitted from the back side of the substrate 12 to the instrument body 11. Thus, the temperature rise of the LED element 35 can be suppressed.

  By forming the projecting portion 25, it is possible to reinforce the instrument body 11, and to attach the case 16 that houses the lighting circuit 18 disposed on the back side of the instrument body 11 by screwing.

  The space inside the protruding portion 25 can also be used as a wiring space for wiring the electric wires 41 of the power feeding member 43 that passes between the divided substrates 12.

  Further, since the nightlight 71 provided separately from the substrate 12 and the substrate 12 is integrally covered with the protective cover 13, it is possible to reduce the generation of bright lines from the protective cover 13 when the nightlight 71 is turned on.

  Since the nightlight 71 is arranged in the notch 36 formed in a part of the substrate 12, there is no need to form a part covering the nightlight 71 from the protective cover 13, for example, and the outer shape of the substrate 12 is aligned. The protective cover 13 can be formed in an outer shape.

  If the remote control changeover switch 69 is mounted on the nightlight board 67 of the nightlight 71, the remote control changeover switch 69 is arranged in an area that is not covered by the protective cover 13, so the remote control changeover switch 69 can be operated without removing the protective cover 13. Can be operated.

  In addition, a lighting fixture is applicable not only to a circular ceiling light but to a square or polygonal lighting fixture.

  Although several embodiments of the present invention have been described, these embodiments are presented by way of example and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and changes can be made without departing from the scope of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the invention described in the claims and the equivalents thereof.

10 Lighting equipment
11 Instrument body
12 Board
13 Protective cover
17 Instrument mounting part
18 Lighting circuit
35 LED elements as semiconductor light-emitting elements
41 electric wire
45 Presser member
52, 53 Presser A Light-emitting unit S Space

Claims (3)

An instrument body having an instrument mounting portion in the center;
A light emitting unit having a semiconductor light emitting element and a substrate on which the semiconductor light emitting element is mounted, the substrate being disposed around the instrument mounting portion on the front side of the instrument body;
A plurality of resin-made pressing members that hold a plurality of locations on the substrate to the instrument body;
The lighting fixture characterized by comprising. It has a translucent protective cover that covers the light emitting unit and is attached to the instrument body, and has a presser part that presses the substrate against the instrument body and a space that allows the substrate to move in the radial direction. The lighting fixture according to claim 1. Having a lighting circuit arranged around the fixture mounting part,
The lighting device according to claim 1, wherein the substrate is divided into a plurality of portions in the circumferential direction, and an electric wire connecting the substrate and the lighting circuit is wired between the divided substrates.

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