JP2010225386A - Surface light-emitting element and luminaire equipped with same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a surface light-emitting element capable of reducing a portion not emitting light. <P>SOLUTION: The surface light-emitting element 1 includes a surface anode 15, a surface cathode 19, a light-emitting layer 17 provided between the electrodes 15 and 19, anode take-out portions 5a and 5b, and a cathode take-out portion 6. The surface light-emitting element 1 has a region where the light-emitting layer 17 is held by the electrodes 15 and 19 in plan view as a light-emitting surface 7. The electrodes 15 and 19 have notch portions 14, 18a and 18b, each notch portion being formed by cutting a part of a corner, and are arranged so that the notch portions may not be mutually overlapped. The anode take-out portions 5a and 5b are arranged at corners of the anode 15, near the notch portions 18a and 18b of the cathode 19. The cathode take-out portion 6 is arranged at a corner of the cathode 19, near the notch portion 14 of the anode 15. The light-emitting element 1 can be improved in designability since each of the take-out portions 5a, 5b and 6 of the regions not emitting light can be made small. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a planar light emitting element and a lighting fixture including the same.

  The planar light emitting device includes a planar anode electrode, a light emitting layer, and a planar cathode electrode, the anode electrode injects holes into the light emitting layer by voltage application, and the cathode electrode injects electrons into the light emitting layer, Light is emitted when holes and electrons injected into the light emitting layer are combined in the light emitting layer. In this planar light emitting element, each electrode extraction portion is often arranged along each of the two sides of the planar anode and cathode electrodes, and the non-light emitting portion becomes large (see, for example, Patent Document 1).

  FIG. 17 shows a configuration of a lighting fixture 52 including such a planar light emitting element 51, and FIG. 18 shows a configuration of the planar light emitting element 51. The lighting fixture 52 includes a planar light emitting element 51, and a front case 53 and a back case 54 that sandwich and protect the planar light emitting element 51. The planar light emitting element 51 includes a rectangular plate-like base material 55, rectangular anode electrodes (not shown), a light emitting layer 56, and a cathode electrode 57 that are sequentially stacked from the base material 55 side. The planar light emitting element 51 has an anode extraction part 58 derived from the anode electrode and a cathode extraction part 59 derived from the cathode electrode 57, and the light emitting layer 56 is composed of the anode electrode and the cathode electrode 57 in plan view. The sandwiched area is a light emitting surface 60.

  Thus, the planar light emitting element 51 is arranged such that the anode and cathode extraction portions 58 and 59 do not overlap each other along the two sides of each electrode. The anode and cathode lead-out portions 58 and 59 are enlarged by being provided along two sides of each electrode. Further, in the planar light emitting element 51, when the anode and cathode extraction portions 58 and 59, which are non-light emitting portions, are increased, the light emitting surface 60 is reduced by the size, and the design is impaired.

  The front case 53 is disposed on the light emitting surface 60 side, has a holding portion 61 for holding the anode and cathode extraction portions 58 and 59, and the light emitting surface 60 is open. When the anode and cathode take-out portions 58 and 59 are enlarged, the holding portion 61 for holding them is also enlarged, and the appearance of the instrument is impaired.

  Thus, a planar light emitting device having one extraction portion for each of the anode and the cathode for each electrode of the anode and the cathode can be considered. FIG. 19 shows a configuration of an illumination device 72 including such a planar light emitting element 71, and FIG. 20 shows a configuration of the planar light emitting element 71. In the planar light-emitting element 71, anode and cathode lead-out portions 58 and 59 are arranged to face each other along one side of each of the anode and cathode electrodes. However, the area of the planar light-emitting element 71 could not be significantly reduced even if the number of anode and cathode extraction portions 58 and 59 which are non-light emitting portions can be reduced. For this reason, the illumination device 72 cannot make the holding portion 61 of the surface case 73 significantly small, so it is difficult to improve the appearance of the appliance.

JP 2008-269988 A

  The present invention has been made to solve the above problems, and an object of the present invention is to reduce a non-light emitting portion in a planar light emitting device.

  In order to achieve the above object, the invention of claim 1 includes a planar anode electrode, a planar cathode electrode, a light emitting layer provided between the planar anode electrode and the planar cathode electrode, and a planar anode electrode. A surface having a light-emitting surface in which the light-emitting layer is sandwiched between the planar anode electrode and the planar cathode electrode in a plan view, comprising a derived anode extraction portion and a cathode extraction portion derived from the planar cathode electrode Each of the planar anode electrode and the planar cathode electrode has a notched portion in which one corner is notched, and is disposed so that the notched portions do not overlap each other. The anode take-out portion is disposed at a corner of the planar anode electrode adjacent to the notch portion of the planar cathode electrode, and the cathode take-out portion is a planar shape adjacent to the notch portion of the planar anode electrode. It is arranged at the corner of the cathode electrode.

  According to a second aspect of the present invention, in the planar light emitting device according to the first aspect, a plurality of the anode extraction portions are provided, and when at least one set of the anode extraction portions is viewed, each has a center of gravity of the planar light emitting device. It is provided at both corners of the planar anode electrode sandwiched therebetween.

  According to a third aspect of the present invention, in the planar light emitting device according to the first or second aspect, a plurality of the cathode extraction portions are provided, and when at least one set of the cathode extraction portions is viewed, each of the planar light emission elements It is provided at both corners of the planar cathode electrode across the center of gravity of the element.

  According to a fourth aspect of the present invention, there is provided the planar light emitting device according to any one of the first to third aspects, wherein the planar anode is disposed between the planar anode electrode and the light emitting layer along an outer peripheral portion of the light emitting surface. An auxiliary electrode electrically connected to the electrode is provided.

  The invention of claim 5 comprises the planar light emitting device according to any one of claims 1 to 4, and a front case and a back case that sandwich and protect the planar light emitting device, The front case is a lighting fixture that is installed on the light emitting surface side, has a holding portion that holds the anode extraction portion and the cathode extraction portion, and the light emission surface is open.

  According to the first aspect of the present invention, since the anode extraction portion and the cathode extraction portion, which are non-light emitting portions, can be reduced, the light emitting surface can be increased and the design can be improved.

  According to the invention of claim 2, since the luminance distribution in each power supply path from at least one set of the anode extraction portion to the cathode extraction portion has the same shape in a symmetrical relationship, it is possible to emit light with uniform luminance distribution. it can.

  According to the invention of claim 3, since the luminance distribution in each power supply path from the anode extraction portion to at least one set of cathode extraction portions has the same shape in a symmetrical relationship, it is possible to emit light with uniform luminance distribution. it can.

  According to the fourth aspect of the present invention, since current flows from the planar anode electrode to the auxiliary electrode and power is supplied uniformly from the entire outer periphery of the light emitting surface, the light can be emitted with a uniform luminance distribution.

  According to the invention of claim 5, since the anode take-out portion and the cathode take-out portion which are non-light emitting portions of the planar light emitting element can be reduced, the holding portion for holding these take-out portions can be reduced, Appearance can be improved.

(A) (b) is an exploded view of the lighting fixture using the planar light emitting element concerning the 1st Embodiment of this invention. The circuit diagram of the lighting fixture which uses the same planar light emitting element. (A)-(c) is a figure which shows the creation process of a planar light emitting element. The top view which shows the modification of a planar light emitting element. The top view which shows the modification of the lighting fixture using a planar light emitting element. The figure which shows the electric power feeding timing to the same planar light emitting element. The exploded view which shows the modification of the lighting fixture using a planar light emitting element. The top view which shows the modification of a planar light emitting element. The top view which shows the other modification of the same planar light emitting element. The top view which shows the lighting fixture using the other modification of the same planar light emitting element. The top view which shows the other modification of the same surface light emitting element. The top view which shows the other modification of the same surface light emitting element. The top view which shows the lighting fixture which uses the further another modification of the same planar light emitting element. (A)-(d) is a figure which shows the preparation process of the planar light emitting element which concerns on the 2nd Embodiment of this invention. AA line sectional view of Drawing 14 (d). (A)-(c) is a figure which shows the preparation process of the planar light emitting element which concerns on the 3rd Embodiment of this invention. The exploded view of the lighting fixture using the conventional planar light emitting element. The top view of the same planar light emitting element. The exploded view of the lighting fixture using another conventional planar light emitting element. The top view of the same planar light emitting element.

(First embodiment)
A planar light emitting device according to a first embodiment of the present invention will be described with reference to the drawings. FIGS. 1A and 1B show the configuration of a lighting fixture 2 that uses the planar light emitting device 1 of the present embodiment (hereinafter abbreviated as a light emitting device). The luminaire 2 includes a light emitting element 1 and a front case 3 and a back case 4 that sandwich and protect the light emitting element 1. The light emitting element 1 includes a plurality of anode extraction portions 5a and 5b, a cathode extraction portion 6, and a light emitting surface 7 that emits light.

  The front case 3 is installed on the light emitting surface 7 side, and includes a holding portion 8 that holds the anode extraction portions 5a and 5b and the cathode extraction portion 6, and an opening portion 9 for opening the light emission surface 7 of the light emitting element 1. Have. The back case 4 is installed on the back side of the light emitting element 1, is made of a metal having high heat dissipation, such as aluminum, and is in contact with the heat dissipating elastic body 10 provided on the back surface of the light emitting element 1. The light emitting element 1 releases heat generated by light emission into the air through the heat dissipating elastic body 10 and the back surface case 4.

  Note that the surface case 3 may be formed of a translucent material instead of providing the opening 9 to open the light emitting surface 7 of the light emitting element 1. In that case, you may improve the external appearance of the lighting fixture 2 by coating the surface case 3 so that the part other than the part to which the light emission surface 7 opposes may be opaque.

  2 and 3A, 3B, and 3C show the configuration of the light-emitting element 1 of the present embodiment. The light emitting element 1 includes a planar anode electrode 15 (hereinafter abbreviated as an anode), a light emitting layer 17, and a planar cathode cathode 19 (hereinafter abbreviated as a cathode), and anode extraction portions 5a and 5b are connected via a switch S1. The cathode extraction unit 6 is grounded while being connected to the constant current circuit 11 and the power source 12. The switch S1 has a terminal sa connected to the anode extraction part 5a side and a terminal sb connected to the anode extraction part 5b side. In addition to the light emitting element 1, the constant current circuit 11 and the wiring connecting the light emitting element 1 and the constant current circuit 11 are held by the front case 3 and the back case 4.

  The light emitting element 1 is created by the following procedure. First, as shown in FIG. 3A, a rectangular anode 15 having a notched portion 14 with one corner cut out is formed on a rectangular plate-like base material 13. The anode 15 has a shape in which one corner is chamfered by the notch 14.

  Next, as shown in FIG. 3B, a rectangular light emitting layer 17 having notches 16 a, 16 b, and 16 c with one corner cut out is formed on the anode 15. The light emitting layer 17 has a shape in which three corners are chamfered by the notches 16 a, 16 b, and 16 c, and the notch 16 c overlaps the notch 14 of the anode 15.

  Further, as shown in FIG. 3C, a rectangular cathode 19 having notches 18 a and 18 b in which one corner is notched is formed on the base material 13 and the light emitting layer 17. The cathode 19 is illustrated as semi-transparent in order to facilitate understanding of the positional relationship with the light emitting layer 17 laminated below. The cathode 19 has a shape in which two corners are chamfered by the notches 18 a and 18 b, and the notches 18 a and 18 b overlap with the notches 16 a and 16 b of the light emitting layer 17. Further, the cathode 19 is arranged so that the cutout portion 14 of the anode 15 does not overlap with the cutout portions 18 a and 18 b of the cathode 19. The light emitting surface 7 is a region where the light emitting layer 17 is sandwiched between the anode 15 and the cathode 19 in a plan view.

  The anode lead-out portions 5 a and 5 b are led out from the anode 15 and are arranged at the corners of the anode 15 close to the notches 18 a and 18 b of the cathode 19. The cathode take-out part 6 is led out from the cathode 19 and is arranged at the corner of the cathode 19 close to the notch part 14 of the anode 15. Therefore, since the light emitting element 1 can reduce the anode extraction parts 5a and 5b and the cathode extraction part 6 which are non-light-emitting parts, the light emitting surface 7 can be enlarged and the design can be improved. Moreover, since the lighting fixture 2 can make small the anode taking-out parts 5a and 5b and the cathode taking-out part 6 which are non-light-emitting parts of the light emitting element 1, the holding part 8 holding these taking-out parts can be made small. The appearance of the instrument can be improved.

  The pair of anode extraction portions 5 a and 5 b included in the light emitting element 1 are provided at both corners of the anode 15 with the center of gravity 20 of the light emitting element 1 interposed therebetween. In the light-emitting element 1, the luminance distribution in each power supply path from the pair of anode extraction portions 5a and 5b to the cathode extraction portion 6 has the same shape in a symmetrical relationship, so that the light can be emitted with a uniform luminance distribution. . As shown in FIG. 4, a set of anode extraction portions 5 a and 5 b may be a light emitting element 1 a provided at a position where the center of gravity 20 is not sandwiched.

  Moreover, as FIG. 5 shows, the lighting fixture 2 may be used combining multiple. In that case, since each lighting fixture 2 is disposed so that the anode extraction portions 5a and 5b, which are non-light emitting portions, and the holding portions 8 that hold the cathode extraction portion 6 are adjacent to each other, there are few boundaries between the non-light emitting portions. Continuous light can be irradiated.

  The substrate 13 is made of a glass plate, a resin plate, or a film, for example, a plastic sheet, a composite of glass and plastic, a light-transmitting ceramic plate, a cured resin, or a sheet / film made of an organic / inorganic hybrid material. Etc. are used as materials.

The anode 15 is not particularly limited as long as the function of the light emitting element 1 is not impaired. For example, a transparent conductive film such as ITO, IZO, AZO, GZO, ATO, SnO ₂ , or a metal thin film such as Ag, Au, Al, etc. A conductive organic material or a combination of these materials is used as the material. Since the anode take-out portions 5 a and 5 b are led out from the anode 15, they are made of the same material as the anode 15. The anode 15 and the cathode 19 are formed by using, for example, a vacuum evaporation method.

Examples of the light-emitting material constituting the light-emitting layer 17 include anthracene, naphthalene, pyrene, tetracene, coronene, perylene, phthaloperylene, naphthaloperylene, diphenylbutadiene, tetraphenylbutadiene, coumarin, oxadiazole, bisbenzoxazoline, bisstyryl, and cyclopentadiene. Quinoline metal complex, tris (8-hydroxyquinolinate) aluminum complex (Alq ₃ ), tris (4-methyl-8-quinolinato) aluminum complex, tris (5-phenyl-8-quinolinato) aluminum complex, aminoquinoline metal Complex, benzoquinoline metal complex, tri- (p-terphenyl-4-yl) amine, 1-aryl-2,5-di (2-thienyl) pyrrole derivative, pyran, quinacridone, rubrene, distyrylben Emissions derivatives, distyryl arylene derivatives, and the like distyrylamine derivatives and various fluorescent pigments. The light emitting layer 17 is formed using, for example, an in-line vapor deposition method, so that the component ratio and film thickness of the light emitting material of the light emitting layer 17 are uniform in the film surface direction.

The cathode 19 includes, for example, an alkali metal, an alkali metal halide, an alkali metal oxide, an alkaline earth metal, and an alloy of these with another metal, specifically sodium, sodium-potassium alloy, lithium, magnesium. Magnesium-silver mixture, magnesium-indium mixture, aluminum-lithium alloy, Al / LiF mixture, etc. are used as materials. As the material of the cathode 19, aluminum, an Al / Al ₂ O ₃ mixture, or the like is also used. Further, the material of the cathode 19 may be an alkali metal oxide, an alkali metal halide, or a metal oxide base material on which one or more conductive materials such as metals are stacked. In this case, an alkali metal / Al laminate, an alkali metal halide / alkaline earth metal / Al laminate, an alkali metal oxide / Al laminate, or the like is used. Since the cathode extraction part 6 is led out from the cathode 19, it is made of the same material as the cathode 19.

  Next, a power feeding method for the light emitting element 1 configured as described above will be described. FIG. 6 shows the power feeding timing of the light emitting element 1 of the present embodiment. The supply time Ta is a time during which the contact position of the switch S1 is at the position of the terminal sa and the current is supplied to the anode extraction portion 5a. The peak value of the current supplied to the anode extraction portion 5a is Iap. The supply time Tb is a time during which the contact position of the switch S1 is at the position of the terminal sb and current is supplied to the anode extraction portion 5b. The peak value of the current supplied to the cathode extraction portion 5b is Ibp. The supply times Ta and Tb can be arbitrarily set by adjusting the timing for switching the contact position of the switch S1. The current peak values Iap and Ibp are both the same value as the peak value Ic of the current flowing from the constant current circuit 11.

  The light emitting element 1 is supplied with a constant current having a peak value Ic without being affected by the temperature difference between the anode 15 and the light emitting element 1 at the time of light emission generated due to the installation state and orientation of the light emitting element 1. Therefore, when the power supply timing is sequentially switched so that the supply times Ta and Tb per unit time are the same, it is possible to emit light with a uniform luminance distribution.

  Next, the modification of the lighting fixture 2 using the light emitting element 1 is demonstrated. As shown in FIG. 7, the lighting fixture 21 has a back case 23 in which an opening 22 is provided. In the lighting fixture 21, the heat dissipating elastic body 10 provided in the light emitting element 1 passes through the opening 22 and is exposed to the outside, and contacts, for example, a housing to which the lighting fixture 21 is attached. The luminaire 21 releases heat generated by light emission into the air through the heat-dissipating elastic body 10 and the housing. Also in the lighting fixture 21 which is this modification, the effect similar to the above-mentioned lighting fixture 2 is acquired.

  Furthermore, a modified example of the light emitting element 1 will be described. As shown in FIG. 8, the light emitting element 1b includes an anode extraction portion 5 and a plurality of cathode extraction portions 6a and 6b. The pair of cathode take-out portions 6a and 6b included in the light emitting element 1b are provided at both corners of the cathode 19 with the center of gravity 20 of the light emitting element 1b interposed therebetween. In the light-emitting element 1b, the luminance distribution in each power supply path from the anode extraction unit 5 to the pair of cathode extraction units 6a and 6b has the same shape in a symmetrical relationship, so that the light can be emitted with a uniform luminance distribution. .

  As shown in FIG. 9, the light emitting element 1 c includes a plurality of anode extraction portions 5 a, 5 b, 5 c and a cathode extraction portion 6. The light emitting element 1c is provided with the anode take-out portions 5a, 5b, and 5c at the three corners of the anode 15, so that the number of power feeding paths increases, so that the luminance distribution can be made uniform and light can be emitted.

  At least one set of anode take-out portions 5a and 5c included in the light emitting element 1c is provided at both corners of the anode 15 with the center of gravity 20 of the light emitting element 1c interposed therebetween. In the light-emitting element 1c, the luminance distribution in each power supply path from the pair of anode extraction portions 5a and 5c to the cathode extraction portion 6 has the same shape in a symmetrical relationship. . Moreover, as FIG. 10 shows, the lighting fixture 2c provided with the light emitting element 1c may be used in multiple combination.

  As illustrated in FIG. 11, the light emitting element 1 d includes one anode extraction unit 5 and one cathode extraction unit 6. These extraction portions are provided at the corners of the anode 15 and the cathode 19 with the center of gravity 20 of the light emitting element 1d interposed therebetween. As shown in FIG. 12, the light emitting element 1 e may be provided in which the anode extraction portion 5 and the cathode extraction portion 6 are provided at positions where the center of gravity 20 is not sandwiched.

  Moreover, as FIG. 13 shows, the lighting fixture 2d provided with the light emitting element 1d may be used in combination. In that case, since each lighting fixture 2d is arranged so that the anode extraction part 5 which is a non-light emitting part and the holding part 8 which holds the cathode extraction part 6 are adjacent to each other, there are few continuous boundaries between the non-light emitting parts. Light can be irradiated. In the light emitting elements 1b, 1c, 1d, and 1e that are these modified examples, the same effects as those of the light emitting element 1 described above can be obtained.

(Second Embodiment)
The planar light emitting device of this embodiment is different from the first embodiment in the configuration in which the auxiliary electrode is formed, and description of other equivalent configurations is omitted. 14 (a), (b), (c), (d) and FIG. 15 show the configuration of the light emitting element 31 of this embodiment. The light emitting element 31 is created by the following procedure. First, as shown in FIG. 14A, an anode 15 having a notch portion 14 in which one corner is notched is formed on a base material 13.

  Next, as shown in FIG. 14B, the auxiliary electrode 32 provided on the anode 15 along the outer peripheral surface of the light emitting surface 7, and the insulation covering the outer and inner circumferences of the auxiliary electrode 32, respectively. Layers 33a and 33b are formed. The auxiliary electrode 32 is made of a metal having a smaller electric resistance than the anode 15 and is electrically connected to the anode 15. The insulating layers 33 a and 33 b prevent the auxiliary electrode 32 from being exposed from the light emitting layer 17 and short-circuiting with the cathode 19.

  Further, as shown in FIG. 14C, the light emitting layer 17 having notches 16a, 16b, and 16c in which one corner is notched on the anode 15, the auxiliary electrode 32, and the insulating layers 33a and 33b. Is formed. In the light emitting layer 17, the notch portion 16 c overlaps the notch portion 14 of the anode 15. Further, as shown in FIG. 15, the auxiliary electrode 32 is disposed between the anode 15 and the light emitting layer 17.

  Furthermore, as shown in FIG. 14D, the cathode 19 having notches 18 a and 18 b with one corner cut out is formed on the base material 13 and the light emitting layer 17. The cathode 19 is arranged such that the notches 18 a and 18 b overlap with the notches 16 a and 16 b of the light emitting layer 17 and do not overlap with the notch 14 of the anode 15. In the light emitting element 31, current flows from the anode 15 to the auxiliary electrode 32 and power is supplied uniformly from the entire outer periphery of the light emitting surface 7, so that the light can be emitted with a uniform luminance distribution.

(Third embodiment)
The planar light emitting device of this embodiment is different from the first embodiment in the configuration in which two anode extraction portions are provided, and the description of other equivalent configurations is omitted. 16A, 16B, and 16C show the configuration of the light emitting element 41 of the present embodiment. The light emitting element 41 is created by the following procedure. First, as shown in FIG. 16A, the anode 15 having the notched portion 42 in which one corner is notched is formed on the base material 13. The anode 15 has a shape in which one corner has a triangular recess due to the notch 42.

  Next, as illustrated in FIG. 16B, the light emitting layer 17 having the notches 16 a, 16 b, 16 c, and 16 d in which one corner is notched is formed on the anode 15. The light emitting layer 17 has a shape in which four corners are chamfered by the notches 16a, 16b, 16c, and 16d.

  Further, as shown in FIG. 16C, the cathode 19 having notches 43 a, 43 b, 43 c, and 43 d in which one corner is notched is formed on the base material 13 and the light emitting layer 17. The The cathode 19 has a shape in which three corners are chamfered by the notches 43a, 43b, and 43c, and one corner is chamfered by the notch 43d. In the cathode 19, the notches 43 a, 43 b and 43 c overlap with the notches 16 a, 16 b and 16 c of the light emitting layer 17. Further, the cathode 19 is arranged such that the notch portion 42 of the anode 15 does not overlap with the notch portions 43 a, 43 b, 43 c, 43 d of the cathode 19.

  The anode take-out portions 5a, 5b, 5c, and 5d are led out from the anode 15 and are arranged at the corners of the anode 15 close to the notches 43a, 43b, 43c, and 43d of the cathode 19. The cathode take-out part 6 is led out from the cathode 19 and is arranged at the corner of the cathode 19 close to the notch 42 of the anode 15.

  The light emitting element 41 is provided with the anode take-out portions 5a, 5b, 5c, and 5d at the four corners of the anode 15, so that the number of power feeding paths is increased, so that the luminance distribution can be made uniform and light can be emitted.

  In the light emitting element 41, when power is supplied from the anode extraction part 5d, the anode extraction part 5d and the cathode extraction part 6 are disposed adjacent to each other, so that current concentration occurs and thermal runaway tends to occur. For this reason, the light emitting element 41 sequentially switches the timing of supplying power to the anode take-out portions 5a, 5b, 5c, and 5d so that the power supply time to the anode take-out portion 5d is shorter than the power supply time to the anode take-out portions 5a, 5b, and 5c. As a result, thermal runaway due to current concentration can be prevented.

  In addition, this invention is not restricted to the structure of said embodiment, A various deformation | transformation is possible in the range which does not change the summary of invention. For example, the shape of the anode extraction portion and the cathode extraction portion is a right triangle shape in the above embodiment, but may be a semicircular shape in which a right angle portion of the right triangle is an arc shape.

1, 1a, 1b, 1c, 1d, 1e, 31, 41 Light emitting element (planar light emitting element)
2, 2c, 2d, 21 Lighting fixture 3 Front case 4, 23 Back case 5, 5a, 5b, 5c, 5d Anode take-out part 6, 6a, 6b Cathode take-out part 7 Light emitting surface 8 Holding part 14, 42 Planar anode electrode Notch 15 anode (planar anode)
17 Light-emitting layer 18a, 18b, 43a, 43b, 43c, 43d Cutout portion of planar cathode electrode 19 Cathode (planar cathode electrode)
20 Center of gravity 32 Auxiliary electrode

Claims (5)

A planar anode electrode, a planar cathode electrode, a light emitting layer provided between the planar anode electrode and the planar cathode electrode, an anode extraction portion derived from the planar anode electrode, and a planar cathode electrode A planar light emitting device comprising a light emitting surface in an area sandwiched between a planar anode electrode and a planar cathode electrode in a plan view,
Each of the planar anode electrode and planar cathode electrode has a cutout part in which one corner is cut out, and is arranged so that the cutout parts do not overlap each other.
The anode take-out part is disposed at a corner of the planar anode electrode adjacent to the notch of the planar cathode electrode,
The planar light emitting device, wherein the cathode extraction part is disposed at a corner of the planar cathode electrode adjacent to the notch of the planar anode electrode.   A plurality of the anode take-out portions are provided, and when at least one set of anode take-out portions is viewed, each is provided at both corners of the planar anode electrode across the center of gravity of the planar light emitting element. The planar light emitting device according to claim 1.   A plurality of the cathode extraction portions are provided, and each of the cathode extraction portions is provided at both corners of the planar cathode electrode across the center of gravity of the planar light emitting element when viewing at least one set of cathode extraction portions. The planar light emitting device according to claim 1 or 2.   The auxiliary electrode electrically connected to the planar anode electrode is provided between the planar anode electrode and the light emitting layer along the outer peripheral portion of the light emitting surface. Item 4. The planar light emitting device according to any one of items 3 to 4. A planar light emitting device according to any one of claims 1 to 4, and a front surface case and a back surface case that sandwich and protect the planar light emitting device,
The said surface case is installed in the said light emission surface side, has a holding part holding the said anode extraction part and a cathode extraction part, The said light emission surface is open | released, The lighting fixture characterized by the above-mentioned.

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