JP2014179204A - Lighting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a lighting system 1 which has high flexibility of arrangement layout by using an organic EL panel 10.SOLUTION: A lighting system 1 comprises an organic EL panel 10 and a power transmission member 11. Long-size power feeding terminals 25 and short-size power feeding terminals 26 are mixed in the organic EL panel 10. The power feeding terminals 25, 26 have needle shape. The power feeding member 11 is constituted by laminating an adhesive layer 50, a bottom side insulation layer 51, an inner side power feeding layer 52, an intermediate insulating layer 53, a surface side power feeding layer 55 and a decoration paper layer 56 from a lateral wall 5 side. A tip part of the long-size power feeding terminal 25 comes into contact with the inner side power feeding layer 52 and an electrode part 30 of the tip part is brought into contact with the inner side power feeding layer 52. The short-size power feeding terminal 26 does not reach the inner side power feeding layer 52, the tip part thereof stops at the surface side power feeding layer 55 and is brought into contact with the surface side power feeding layer 55.

Description

  The present invention relates to an illumination system provided indoors or outdoors. In particular, the present invention relates to an illumination system that takes advantage of the characteristics of an organic EL (Electro Luminescence) panel.

  In recent years, organic EL panels have attracted attention as a lighting device that can replace incandescent lamps and fluorescent lamps, and many studies have been made.

Here, the organic EL panel is formed by laminating an organic EL element on a substrate such as a glass substrate, a transparent resin film, or a metal sheet, and forming a power feeding structure for feeding power to the organic EL element.
The organic EL element is one in which one or both of two electrodes having translucency face each other, and a light emitting layer made of an organic compound is laminated between the electrodes. The organic EL panel emits light by the energy of recombination of electrically excited electrons and holes.
That is, the organic EL panel is a self-luminous device and can emit light of various wavelengths by appropriately selecting the material of the light emitting layer.

  In addition, the organic EL panel has a feature that it is extremely thin and lightweight compared to incandescent lamps, fluorescent lamps, and LED lighting, and emits light in a planar shape, so that there are few restrictions on installation locations. Furthermore, since the organic EL panel has higher luminous efficiency than incandescent lamps and fluorescent lamps, the organic EL panel has features that it consumes less power and generates less heat.

Since the organic EL panel is extremely thin as described above, it is possible to emit light on the entire wall or ceiling by laying it on an indoor wall, ceiling, floor or the like.
Patent Document 1 discloses a measure for supplying power to an organic EL panel in a state where the organic EL panel is stuck on a wall.

In the measure disclosed in Patent Document 1, conductive tape is attached to the wall in parallel at regular intervals. A DC voltage is applied to the conductive tape.
On the other hand, the organic EL panel is provided with positive and negative electrodes on the back side. Then, the organic EL panel is attached to the wall in a state where the electrode of the organic EL panel is aligned with the position of the conductive tape on the wall side described above.

JP 2007-147725 A

According to the measure disclosed in Patent Document 1, an organic EL panel can be placed on the entire wall, and all the organic EL panels can be fed to emit light.
However, the illumination system disclosed in Patent Document 1 has a complaint that the degree of freedom in the layout of the organic EL panel is low.
In other words, the method disclosed in Patent Document 1 supplies power by bringing the electrode of the organic EL panel into contact with the conductive tape attached in parallel, so the organic EL panel must be placed straight along the conductive tape. I must. That is, it is necessary to arrange the organic EL panels in a matrix form like a grid pattern.
Therefore, according to the measure disclosed in Patent Document 1, it is impossible to realize a layout in which the organic EL panels are arranged obliquely, arranged in a staggered manner, or arranged in an inclined posture.

  Accordingly, the present invention aims to develop an illumination system that pays attention to the above-mentioned problems of the prior art and has a high degree of freedom in arrangement layout.

  The invention according to claim 1 for solving the above-described problem is constituted by a light emitting panel and a fixed member, the light emitting panel is attached to the fixed member, and power is supplied to the light emitting panel from the fixed member side. In a lighting system that emits light from a light-emitting panel, the light-emitting panel has a light-emitting area on the front side, a power supply member on the back side, and the power supply member has a power supply terminal protruding in a normal direction. The fixed member is provided with a plurality of power supply layers with an insulating layer interposed therebetween, and in a state where the light emitting panel is attached to the fixed member, at least one electrode portion of the power supply terminal is provided. The illumination system is characterized in that the power supply layer is in contact, at least one other electrode portion is in contact with at least another power supply layer, and power is supplied from the power supply layer to a light emitting region through a power supply terminal.

In the illumination system of the present invention, a power supply terminal that protrudes in the normal direction is provided on the back side of the light emitting panel.
On the other hand, the member to be fixed is provided with a plurality of power feeding layers with an insulating layer interposed therebetween.
In the illumination system of the present invention, the power supply terminal of the light emitting panel is inserted from the surface side of the fixed member, the specific electrode portion is brought into contact with one power feed layer, and the other electrode portion is brought into contact with the other power feed layer.
According to the illumination system of the present invention, it is not always necessary to arrange the light emitting panels in a straight line. Therefore, the lighting system according to the present invention has a high degree of freedom in layout when installing the light-emitting panel.

  The invention according to claim 2 is the illumination system according to claim 1, wherein the power supply terminal includes a plurality of power supply terminals, and the power supply terminals are mixed in different lengths.

The power supply terminals employed in the present invention are mixed in different lengths. Further, as described above, the fixed member employed in the present invention is provided with a plurality of power supply layers with an insulating layer interposed therebetween, so that the distance from the surface to one power supply layer and the other power supply from the surface. The distance to the layer is different. That is, there are a power feeding layer on the side close to the surface and a power feeding layer on the back side.
Therefore, the long power supply terminal reaches the power supply layer disposed on the back side, but the short power supply terminal is short in length and does not reach the power supply layer disposed on the back side. Therefore, the power feeding terminal is connected to the power feeding layer that should be connected.

  The invention described in claim 3 has a plurality of power supply terminals, and the power supply terminals are mixed in ones having different electrode positions. is there.

In the power supply terminals employed in the present invention, terminals having different electrode positions are mixed.
Therefore, when the electrode part is provided on the tip side of the power supply terminal, the electrode part reaches the power supply layer arranged on the back side, but when the electrode part is provided on the base side, the distance is Insufficient and does not reach the power feeding layer on the far side. Therefore, an electrode part will be connected to the electric power feeding layer which should be connected originally.

  In the invention according to claim 4, the power supply terminal has a plurality of electrode portions, a specific electrode portion of one power supply terminal is in contact with one power supply layer, and the other one electrode portion is in another one power supply layer. The lighting system according to claim 1, wherein the lighting system is in contact with each other.

  Also in this invention, an electrode part is connected to the electric power feeding layer which should be connected originally.

  According to a fifth aspect of the present invention, in the power feeding terminal, the surface of the tip portion functions as an electrode portion, and the surface on the base side is covered with an insulating material. A lighting system as described.

  According to the present invention, it is possible to prevent the power supply terminal from being connected to a power supply layer that should not be in contact. In particular, the long power supply terminal passes through the power supply layer on the near side (the side close to the surface) and reaches the power supply layer on the back side. However, in the present invention, the surface on the base side is covered with an insulating material. The non-regular electrode part does not contact the power feeding layer (side closer to the surface).

  The invention according to claim 6 is characterized in that the tip of the power supply terminal is pointed, and the electrode portion is in contact with the power supply layer by inserting the power supply terminal into the fixed member. It is a lighting system of a crab.

The power supply terminal of the present invention has, for example, a needle shape, and can perforate itself by being pushed into a fixed member to reach the power supply layer.
Further, when a prepared hole is provided in advance in the member to be fixed, the prepared hole can be expanded to reach the power feeding layer.

  According to a seventh aspect of the present invention, there is an adhesive portion between the rear surface side of the light emitting panel and the fixed member, and the light emitting panel and the fixed member are coupled by the adhesive portion. It is an illumination system in any one of thru | or 6.

  According to the present invention, the light emitting panel can be fixed to the fixed member by the adhesive portion. The bonding portion may be provided in advance on the light emitting panel side, or may be provided on the fixed member side. Moreover, you may provide an adhesion part by apply | coating an adhesive agent to either one at a construction site.

  The invention according to claim 8 includes a power transmission member in which the plurality of power feeding layers are stacked with an insulating layer interposed therebetween and has a planar shape, and the power transmission member is fixed to a structure with an adhesive, The lighting system according to claim 1, wherein a decorative member is provided on a surface side of the power transmission member.

A member to be fixed can be made by sticking the power transmission member of the present invention to a building.
Moreover, since the power transmission member of this invention has the decorative member provided on the surface, it is suitable for the layout which does not provide a light emitting panel on all the surfaces of a to-be-fixed member.
That is, since the decorative member is exposed in a portion where the light emitting panel is not provided, the appearance is maintained.
The decorative member is, for example, wallpaper.

  According to the ninth aspect of the present invention, a constant voltage is supplied to the power supply layer through a constant voltage circuit, and the light-emitting panel has a first electrode layer, an organic light-emitting layer, and a first electrode on a substrate having a planar shape. The lighting system according to claim 1, wherein the lighting system is an organic EL panel in which two electrode layers are stacked, and the light-emitting panel further includes a constant current circuit.

  In the present invention, an organic EL panel is adopted as the light emitting panel. A constant voltage is supplied to the power supply layer through a constant voltage circuit. Therefore, a constant voltage is applied to the light emitting panel. In the present invention, since a constant current circuit is built in the light emitting panel, a constant and stable current flows through the organic EL element. Therefore, the brightness and brightness of each light emitting panel are uniform. Moreover, since the electric current which flows into an organic EL element is restrict | limited to a fixed limit, the lifetime of a light emission panel becomes long.

  According to a tenth aspect of the present invention, the power supply terminal has a non-return structure, and a force required for removal is larger than a force required for insertion into the fixed member. It is an illumination system in any one of 1 thru | or 9.

  According to the present invention, the light emitting panel can be easily fixed.

  The lighting system of the present invention has a higher degree of freedom in the layout of the light emitting panels than in the prior art, and therefore, it is possible to make light emitting walls and ceilings with a more innovative design.

It is a perspective view of the living space which employ | adopted the illumination system of embodiment of this invention. It is a partial cross section exploded perspective view of the lighting system of FIG. 1, and has shown the side wall of the structure, the to-be-fixed member, and the light emission panel. It is sectional drawing of a light emission panel. It is sectional drawing in the state which attached the light emission panel to the to-be-fixed member. It is a circuit diagram of the illumination system of FIG. It is a front view of the electric power feeding terminal of the light emission panel employ | adopted with the illumination system of FIG. It is a front view which shows the modification of an electric power feeding terminal. It is a front view which shows the other modification of an electric power feeding terminal. It is sectional drawing which shows the other modification of an electric power feeding terminal. It is a partial cross section exploded perspective view of the lighting system of the embodiment of the present invention, and shows the side wall of the structure, the member to be fixed, and the light emitting panel.

Embodiments of the present invention will be further described below.
The illumination system 1 of this embodiment is adopted in the ceiling 3 and one side wall 5 of the living space 2 as shown in FIG.
That is, in the living space 2 shown in FIG. 1, three organic EL panels 10 are mounted on the ceiling 3, and five organic EL panels 10 are mounted on the side wall 5.

  The illumination system 1 of the present invention is employed for both the ceiling 3 side and the side wall 5. Hereinafter, the illumination system 1 on the side wall 5 side will be mainly described.

  The illumination system 1 according to this embodiment includes an organic EL panel 10 and a power transmission member 11. Moreover, in this embodiment, the to-be-fixed part 7 is comprised by the power transmission member 11 and the side wall 5. FIG.

The organic EL panel 10 has a layer configuration similar to that of a known organic EL device, and further includes a power feeding unit 20 unique to the present embodiment.
That is, in the organic EL panel 10, as shown in FIG. 3, the organic EL element 13 (laminated body) is laminated on a light-transmitting substrate 12 (base material), and the organic EL element 13 is sealed thereon. The inorganic sealing layer 15 is laminated.
The organic EL element 13 includes a functional layer 17 (organic light emitting layer) that actually emits light at least between the first electrode layer 16 and the second electrode layer 18 as shown in FIG. The organic EL panel 10 of the present embodiment employs a so-called “bottom emission type” that extracts light from at least the substrate 12 side. The organic EL element 13 includes the first electrode layer 16, the functional layer 17, The second electrode layer 18 is formed by being laminated in this order.
The organic EL panel 10 employed in this embodiment is a “bottom emission type” as described above, and most of the surface side of the substrate 12 is the light emitting region 8 (FIG. 2).

  The material of the board | substrate 12 will not be specifically limited if it is provided with transparency and insulation, For example, it selects from a glass substrate, a flexible film board | substrate, a plastic substrate etc. suitably, and is used. In particular, a glass substrate or a transparent film substrate is suitable from the viewpoint of transparency and workability, and in this embodiment, a glass substrate is employed as the substrate.

  The first electrode layer 16 is a layer formed of a transparent conductive oxide, and has transparency when turned off. Specifically, indium tin oxide (ITO) or the like can be used. The first electrode layer 16 of the present embodiment is used as an anode and is made of ITO.

  The functional layer 17 is a layer provided between the first electrode layer 16 and the second electrode layer 18 and including at least one organic light emitting layer. The functional layer 17 of this embodiment is composed of a plurality of layers mainly made of organic compounds. The functional layer 17 can be formed of a known material such as a low molecular dye material or a conjugated polymer material used in a general organic EL device. In addition, the functional layer 17 may have a multilayer structure including a plurality of layers such as a hole injection layer, a hole transport layer, an organic light emitting layer, an electron transport layer, and an electron injection layer.

  The material of the 2nd electrode layer 18 is not specifically limited, For example, silver (Ag), aluminum (Al), etc. are mentioned. The second electrode layer 18 of the present embodiment is used as a cathode and is made of Al.

  The material of the inorganic sealing layer 15 is not particularly limited as long as it has insulating properties and sealing properties, but one or more elements selected from oxygen, carbon, and nitrogen, and silicon It is preferably formed of a silicon alloy composed of an element, and silicon nitride or silicon oxide containing a bond such as Si—O, Si—N, Si—H, or N—H, and an oxynitride that is an intermediate solid solution of both. Particularly preferred is silicon. Moreover, you may use the inorganic sealing layer of a multilayer structure.

In the organic EL panel 10 of the present embodiment, the power feeding unit 20 is provided on the back side of the substrate 12. More specifically, the power feeding unit 20 is provided on the back side of the inorganic sealing layer 15.
The power feeding unit 20 has a power feeding box 22 having a certain degree of rigidity and a small thickness.
A plurality of power supply terminals 25 and 26 are provided outside the power supply box 22. The power supply terminals 25 and 26 both extend in a direction perpendicular to the substrate 12 and the power supply box 22. That is, the power supply terminals 25 and 26 are erected in the normal direction of the organic EL panel 10.
For the sake of drawing, four power supply terminals 25 and 26 are shown, but the actual number is larger.

Two types of power supply terminals 25 and 26 are mixed. That is, a long power supply terminal 25 having a long overall length and a short power supply terminal 26 having a short overall length are mixed.
As shown in FIG. 6, the power supply terminals 25 and 26 are both needle-shaped and have sharp tips.
Further, the tip portions of both the power supply terminals 25 and 26 are electrode portions 30 and 31.
Both of the power supply terminals 25 and 26 are made of a metal having excellent conductivity such as copper. However, the long power supply terminal 25 is exposed only at the tip, and the other part is covered with an insulating material 33. It has been broken.

  An adhesive layer 35 is provided on the outer surface of the power supply box 22 as shown in FIG. At the stage of shipment from the factory, a release paper (not shown) is attached to the adhesive layer 35, and the release paper is peeled off at the construction site to expose the adhesive layer 35.

  A constant current device 40 is provided in the power supply box 22. The constant current device 40 incorporates a known constant current circuit 43 (FIG. 5), and is a circuit that allows a constant current to flow regardless of supply voltage fluctuations or load fluctuations.

In the power supply box 22, power supply terminals 25 and 26 are connected to the input side of the constant current device 40 by wiring 45. The constant current device 40 has a positive input terminal and a negative input terminal (not shown). The output side of the constant current device 40 also has a plus side and a minus side.
Here, the power supply terminals 25 and 26 have a long length and a short length. The long power supply terminal 25 having a long total length is collectively connected to one of the positive side terminal and the negative side terminal of the constant current device 40. It is connected. Further, the short power supply terminal 26 having a short overall length is collectively connected to the other terminal of the constant current device 40.
The output side of the constant current device 40 is connected to the first electrode layer 16 and the second electrode layer 18 of the organic EL element 13 by wirings 47 and 48.

  Next, the power transmission member 11 will be described. The power transmission member 11 is a sheet or a plate having a certain area. The power transmission member 11 has an area of a fixed size such as 900 mm and 1800 mm (so-called 3 and 6 dimensions), for example.

The power transmission member 11 is formed by alternately laminating insulating layers and metal layers.
Referring to the posture of FIG. 2, the power transmission member 11 includes the adhesive layer 50, the bottom insulating layer 51, the back power feeding layer 52, the intermediate insulating layer 53, the surface power feeding layer 55, and the decorative paper from the side wall 5 side. The layer 56 is laminated.
At the stage of shipment from the factory, a release paper (not shown) is attached to the adhesive layer 50, and the release paper is peeled off at the construction site to expose the adhesive layer 50.

  As specific materials for these insulating layers, Huntman's Probimer or similar materials having insulating properties, tight bonding properties, and rigidity can be used.

The bottom insulating layer 51 is preferably hard and can withstand the penetrating force.
The back side feeding layer 52 is a copper or aluminum foil or a thin plate.
The intermediate insulating layer 53 is preferably thicker than the back side power supply layer 52 and the front side power supply layer 55. The intermediate insulating layer 53 is desirably thicker and softer than the bottom insulating layer 51.
The front-side power supply layer 55 is a copper or aluminum foil or a thin plate.
As the decorative paper layer 56, an electrically insulating layer is used. Moreover, in order to maintain electrical insulation, it is possible to employ one having one surface coated with an insulating layer.
The decorative paper layer 56 may have a pattern or pattern as shown in FIG.

  In the present embodiment, the power transmission member 11 is attached to the ceiling 3 of the living space 2 and the entire side wall 5. That is, it is affixed to the side wall 5 of concrete or a plate by the adhesive layer 50 on the back side.

In the present embodiment, the organic EL panel 10 is inserted from the surface side of the power transmission member 11. That is, the needle-shaped power supply terminals 25 and 26 provided on the back surface of the organic EL panel 10 are pressed against the surface of the power transmission member 11, and the power supply terminals 25 and 26 are transmitted by lightly tapping the organic EL panel 10 with, for example, a plastic hammer. Drive into member 11.
Alternatively, the power feeding terminals 25 and 26 are pushed into the power transmission member 11 by being pushed by hand.
In this embodiment, since the front-end | tip of the electric power feeding terminals 25 and 26 is sharp, it can insert in the power transmission member 11 easily.

The state where the power supply terminals 25 and 26 are inserted into the power transmission member 11 is as shown in FIG. 4, and the tip of the long power supply terminal 25 reaches the back-side power supply layer 52, and the electrode portion 30 at the tip is in the back. It is in contact with the side power supply layer 52.
Further, the middle portion of the long power supply terminal 25 penetrates the surface-side power supply layer 55, and its side surface is in contact with the surface-side power supply layer 55, but the portion is covered with the insulating material 33. Therefore, the long power supply terminal 25 is electrically connected only to the back power supply layer 52.

  On the other hand, the short-size power supply terminal 26 does not reach the back-side power supply layer 525 because the total length is short, and the tip thereof stops at the front-side power supply layer 55. Therefore, the electrode portion 31 at the tip is in contact only with the surface-side power feeding layer 55.

In the illumination system of this embodiment, direct current is supplied to the power transmission member 11 as shown in the circuit diagram of FIG. That is, in the illumination system of the present embodiment, power is supplied to the power transmission member 11 via the power supply unit 61. Here, the power supply unit 61 includes a rectifier circuit and a constant voltage circuit. As is well known, the constant voltage circuit is a circuit that outputs a constant voltage regardless of the load condition.
A commercial power supply 60 is connected to an input side terminal (not shown) of the power supply unit 61. Further, the back-side power supply layer 52 and the surface-side power supply layer 55 of the power transmission member 11 are connected to an output-side terminal (not shown) of the power supply unit 61.
Accordingly, each organic EL panel 10 is connected in parallel to the back-side power supply layer 52 and the surface-side power supply layer 55 as shown in the circuit diagram of FIG. A constant current is supplied to the organic EL element 13 of each organic EL panel 10 via the constant current circuit 43.
Therefore, each organic EL panel 10 emits light with uniform brightness and luminance.

  According to this embodiment, since there is no restriction | limiting in the attachment position of the organic electroluminescent panel 10, the freedom degree of a layout is high.

Next, a modified example of the power feeding terminal will be described.
In the power supply terminals 25 and 26 described above, the insulating material 33 is provided only on the long-size power supply terminal 25, but of course, the short-size power supply terminal 26 may be provided with the insulating material 33.
Further, in the power supply terminals 25 and 26 described above, the power supply layers 52 and 55 that are in contact with each other are changed by changing the length. However, like the power supply terminals 70 and 71 shown in FIG. Thus, the positions of the electrode portions 72 and 73 may be different.

  Further, like the power supply terminals 75 and 76 shown in FIG. 8, a check structure 80 may be provided on the power supply terminals 75 and 76. For example, a saw blade-like projection as shown in FIG. 8 may be provided, and a structure that requires a strong force in the pulling direction may be added although the forward side easily proceeds.

Further, as shown in FIG. 9, a plurality of electrode portions 82 and 85 may be provided on one power supply terminal 81 with an insulating portion 83 interposed therebetween.
In the present embodiment, the electrode portion 82 on the distal end side is in contact with the back-side power supply layer 52, and the electrode portion 85 near the base is in contact with the surface-side power supply layer 55.

  In the previous embodiment, the surface of the power transmission member 11 is smooth, but a number of pilot holes 88 may be provided like the power transmission member 87 shown in FIG.

DESCRIPTION OF SYMBOLS 1 Illumination system 5 Side wall 7 To-be-fixed part 10 Organic electroluminescent panel 11, 87 Power transmission member 12 Board | substrate 13 Organic EL element 15 Inorganic sealing layer 17 Functional layer 20 Feeding part 25 Long-size feed terminal 26 Short-size feed terminal 30, 31, 72 , 73, 82, 85 Electrode portion 33, 83 Insulating material 35 Adhesive layer 40 Constant current device 43 Constant current circuit 50 Adhesive layer 51 Bottom side insulating layer 52 Back side power supply layer 53 Intermediate insulating layer 55 Surface side power supply layer 56 Makeup Paper layer 70, 71, 75, 76, 81 Feed terminal 80 Check structure

Claims (10)

In an illumination system that includes a light emitting panel and a fixed member, attaches the light emitting panel to the fixed member, supplies power to the light emitting panel from the fixed member side, and emits the light emitting panel.
The light emitting panel has a light emitting region on the front side, a power supply member on the back side, the power supply member has a power supply terminal protruding in a normal direction, and the power supply terminal has an electrode part,
The fixed member is provided with a plurality of power supply layers with an insulating layer interposed therebetween,
In a state where the light emitting panel is attached to the fixed member, the electrode portion of the power supply terminal is in contact with at least one power supply layer, and the other at least one electrode portion is in contact with at least one other power supply layer,
A lighting system, wherein power is supplied from the power supply layer to a light emitting region through a power supply terminal.   The lighting system according to claim 1, comprising a plurality of power supply terminals, wherein the power supply terminals are mixed in different lengths.   The lighting system according to claim 1, wherein a plurality of power supply terminals are provided, and the power supply terminals are mixed in ones having different electrode positions.   The power supply terminal includes a plurality of electrode portions, a specific electrode portion of one power supply terminal is in contact with one power supply layer, and the other one electrode portion is in contact with another one power supply layer. The illumination system according to any one of 1 to 3.   5. The illumination system according to claim 1, wherein the surface of the power supply terminal functions as an electrode portion, and the surface on the base side is covered with an insulating material.   The lighting system according to claim 1, wherein the tip of the power supply terminal is pointed, and the electrode portion is in contact with the power supply layer by inserting the power supply terminal into the fixed member.   The illumination according to any one of claims 1 to 6, wherein an adhesive portion is provided between the rear surface side of the light emitting panel and the fixed member, and the light emitting panel and the fixed member are coupled by the adhesive portion. system.   The plurality of power feeding layers are stacked with the insulating layer interposed therebetween, and have a power transmission member having a planar shape. The power transmission member is fixed to a structure with an adhesive, and a cosmetic is disposed on the surface side of the power transmission member. The illumination system according to claim 1, wherein a member is provided.   A constant voltage is supplied to the power supply layer through a constant voltage circuit, and the light-emitting panel is an organic EL in which a first electrode layer, an organic light-emitting layer, and a second electrode layer are stacked on a substrate having a planar shape. The lighting system according to claim 1, wherein the lighting system further includes a constant current circuit.   The power feeding terminal has a check structure, and a force required for removal is larger than a force required for insertion into the fixed member. Lighting system.

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