JP2013187140A - Organic el module - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently extract light generated in an organic layer from a non-light-emitting part.SOLUTION: An organic EL module includes an organic EL panel 10 which includes an organic layer 15 and a transparent substrate 11 and in which light incident on the transparent substrate 11 through a rear surface 13 of the transparent substrate 11 from the organic layer 15 is emitted from a front surface 12 of the transparent substrate 11. The front surface 12 of the transparent substrate 11 includes a light-emitting part R1 from which light is emitted, and a non-light-emitting part R2 positioned on the outer periphery of the light-emitting part R1. A light scattering structure 30 is provided on the rear surface 13 side of the non-light-emitting part R2 of the transparent substrate 11.

Description

  The present invention relates to an organic EL module including an organic EL (Organic Electroluminescence) panel.

  In recent years, organic EL modules with high luminous efficiency using organic EL panels have attracted attention. The organic EL module is not limited to the lighting field, and is also used as a backlight for various devices such as a liquid crystal television, a computer monitor, or outdoor advertising.

  Japanese Patent Laying-Open No. 2011-243448 (Patent Document 1) discloses an invention relating to an organic EL element that emits light incident on a transparent substrate from an organic layer from a light emitting surface facing the surface on which the organic layer is installed. ing. In this organic EL element, the transparent substrate has a light emitting surface having an area larger than the light emitting area of the organic layer. A light reflection layer made of a specular metal film is provided on a portion excluding the surface on which the organic layer is installed and the light emission surface.

  According to this organic EL element, according to this organic EL element, the light from the organic layer is not leaked from the back surface or side surface of the transparent substrate, and is effectively used to reduce the light flux emitted from the light emitting surface. It can be suppressed.

JP 2011-243448 A

  In an organic EL panel, an electrode extraction part for supplying power to the organic layer or a sealing member for sealing the organic layer may be provided on the outer periphery of the organic EL panel. In this case, the light emitting part from which the light generated in the organic layer is mainly emitted is formed on the center side of the light emission surface of the organic EL panel.

  On the other hand, a non-light emitting portion is formed on the outer periphery of the light emitting portion on the light emitting surface so as to correspond to the electrode extraction portion or the sealing member. In the non-light emitting portion, light is less likely to be extracted than in the light emitting portion, and light generated in the organic layer is hardly emitted or not emitted in comparison with the light emitting portion.

  An object of this invention is to provide an organic electroluminescent module provided with the organic electroluminescent panel which can take out the light produced | generated by the organic layer from a non-light-emitting part efficiently.

  The organic EL module according to the present invention includes an organic EL panel having an organic layer and a transparent substrate, and light incident on the transparent substrate from the organic layer through the back surface of the transparent substrate is emitted from the surface of the transparent substrate. The surface of the transparent substrate includes a light emitting portion from which the light is emitted and a non-light emitting portion located on the outer periphery of the light emitting portion, and on the back side of the non-light emitting portion of the transparent substrate, A light scattering structure is provided.

  Preferably, the non-light-emitting portion on the surface of the transparent substrate is provided with a light extraction structure. Preferably, the light extraction structure is provided on the entire surface of the transparent substrate. Preferably, a plurality of the organic EL panels are provided, and the plurality of the organic EL panels are arranged in a plane.

  ADVANTAGE OF THE INVENTION According to this invention, an organic electroluminescent module provided with the organic electroluminescent panel which can take out the light produced | generated by the organic layer from a non-light-emitting part efficiently can be obtained.

It is a bottom view which shows the organic EL module in embodiment. It is a top view which shows the organic electroluminescent panel used for the organic electroluminescent module in embodiment. It is arrow sectional drawing along the III-III line in FIG. It is sectional drawing which shows the organic electroluminescent panel in the 1st modification of embodiment. It is sectional drawing which shows the organic electroluminescent panel in the 2nd modification of embodiment. It is a bottom view which shows the basic composition of the organic electroluminescent panel used for an experiment example. It is a figure which expands and shows the area | region enclosed by the VII line in FIG. It is sectional drawing which shows the organic electroluminescent panel used in Example 1 of the experiment example. It is sectional drawing which shows the organic electroluminescent panel used in Example 2 of the experiment example. It is sectional drawing which shows the organic electroluminescent panel used in Example 3 of the experiment example. It is sectional drawing which shows the organic electroluminescent panel used in Example 4 of the experiment example. It is sectional drawing which shows the organic electroluminescent panel used in Example 5 of the experiment example. It is sectional drawing which shows the organic electroluminescent panel used in Example 6 of the experiment example. It is sectional drawing which shows the organic electroluminescent panel used by the comparative example 1 of the experiment example. It is sectional drawing which shows the organic electroluminescent panel used by the comparative example 2 of the experiment example. It is a figure which shows the experimental condition and experimental result of an experiment example.

  Embodiments and examples based on the present invention will be described below with reference to the drawings. In the description of the embodiments and the examples, when the number, amount, and the like are referred to, the scope of the present invention is not necessarily limited to the number, amount, and the like unless otherwise specified. In the description of the embodiment and each example, the same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated.

(Organic EL module 100)
With reference to FIG. 1, the whole structure of the organic EL module 100 in embodiment is demonstrated. FIG. 1 is a bottom view showing the organic EL module 100. The organic EL module 100 includes a plurality of organic EL panels 10. The organic EL module 100 according to the present embodiment includes nine organic EL panels 10 arranged in a matrix direction. Each of these organic EL panels 10 is composed of an organic EL.

  Nine organic EL panels 10 are arranged in a plane. As long as these organic EL panels 10 are arranged in a planar shape, they may be arranged in a curved shape. The nine organic EL panels 10 are electrically connected to an external power supply device (not shown) and can emit light when supplied with electric power.

(Organic EL panel 10)
Details of the organic EL panel 10 will be described with reference to FIGS. 2 and 3. FIG. 2 is a plan view showing the organic EL panel 10 used in the organic EL module 100 (see FIG. 1). 3 is a cross-sectional view taken along the line III-III in FIG. For convenience of illustration, in FIG. 2, the light scattering structure 30 (details will be described later) is indicated by a one-dot chain line.

  As shown in FIG. 2, the organic EL panel 10 in the present embodiment has a substantially square shape. As shown in FIG. 3, the organic EL panel 10 includes a transparent substrate 11 (cover layer), an anode 14, an organic layer 15, a cathode 16, a sealing member 17, and an insulating layer 18. The transparent substrate 11 has a front surface 12 (light emitting surface) and a back surface 13. The anode 14, the organic layer 15, and the cathode 16 are sequentially stacked on the back surface 13 of the transparent substrate 11.

  The transparent substrate 11 is composed of various glass substrates, for example. As a member constituting the transparent substrate 11, a film substrate such as PET (Polyethylene Terephthalate) or polycarbonate may be used.

  The anode 14 is a conductive film having transparency. In order to form the anode 14, ITO (Indium Tin Oxide) or the like is formed on the transparent substrate 11 by sputtering or the like. The anode 14 is formed by patterning the ITO film into a predetermined shape by photolithography or the like. The anode 14 in the present embodiment is divided into two regions by patterning in order to form the electrode portion 21 and the electrode portion 22. A divided region 20 (see FIG. 2) is provided between the electrode portion 21 and the electrode portion 22.

  The organic layer 15 (light emitting unit) can generate light (visible light) by being supplied with electric power. The organic layer 15 may be constituted by a single organic layer, or may be constituted by sequentially laminating a hole transport layer, an organic layer, a hole blocking layer, an electron transport layer, and the like.

  The cathode 16 is, for example, aluminum (Al). The cathode 16 is formed so as to cover the organic layer 15 by a vacuum deposition method or the like. In order to pattern the cathode 16 into a predetermined shape, a mask may be used during vacuum deposition.

In the present embodiment, an insulating layer 18 is provided between the cathode 16 and the anode 14 on the electrode portion 21 side so that the cathode 16 and the anode 14 are not short-circuited. The part of the cathode 16 opposite to the side on which the insulating layer 18 is provided is connected to the anode 14 on the electrode part 22 side. The insulating layer 18 is formed in a desired pattern so as to cover a portion that insulates the anode 14 and the cathode 16 from each other using a photolithography method or the like after, for example, a SiO ₂ film is formed using a sputtering method. .

  The sealing member 17 is made of an insulating resin or glass substrate. The sealing member 17 is formed to protect the organic layer 15 from moisture and the like. The sealing member 17 seals substantially the entire anode 14, organic layer 15, and cathode 16 (member provided inside the organic EL panel 10) on the transparent substrate 11. A part of the anode 14 is exposed from the sealing member 17 for electrical connection.

  The portion of the anode 14 exposed from the sealing member 17 (on the left side in FIG. 3) constitutes the electrode portion 21. The electrode portion 21 and the anode 14 are made of the same material. The electrode part 21 is located on the outer peripheral part of the organic EL panel 10 (see FIG. 2).

  The portion of the anode 14 exposed from the sealing member 17 (on the right side in FIG. 3) constitutes an electrode portion 22. The electrode part 22 and the anode 14 are made of the same material. The electrode part 22 is also located on the outer peripheral part of the organic EL panel 10 (see FIG. 2). The electrode part 21 and the electrode part 22 are located on opposite sides of the organic layer 15 and are electrically insulated from each other by the divided region 20 (see FIG. 2).

  In the organic EL panel 10 configured as described above, a light emitting portion R1 (see FIGS. 1 and 3) and a non-light emitting portion R2 (see FIGS. 1 and 3) are formed on the surface 12 of the transparent substrate 11. . The region where the light emitting portion R1 is formed is located on the center side of the surface 12 (light emitting surface) and substantially corresponds to the region where the organic layer 15 is formed. The region where the non-light emitting portion R2 is formed is located on the outer periphery of the light emitting portion R1, and substantially corresponds to the region where the electrode portions 21 and 22 are formed.

  Light is generated inside the organic layer 15 by supplying power from the external power supply device through the electrode portions 21 and 22 (electrode extraction portions). The light generated inside the organic layer 15 enters the transparent substrate 11 through the back surface 13 of the transparent substrate 11.

  Most of the light incident on the inside of the transparent substrate 11 is emitted from the surface 12 of the transparent substrate 11. This light is mainly extracted from the light emitting portion R1 to the outside. Here, the organic EL panel 10 of the present embodiment is provided with a light scattering structure 30 described below. When the light scattering structure 30 is not provided, little or no light is extracted from the non-light emitting portion R2, but the light scattering structure 30 can efficiently extract light from the non-light emitting portion R2. It becomes.

(Light scattering structure 30)
With reference to FIG. 2 and FIG. 3, specifically, the light scattering structure 30 is provided on the opposite side (back surface 13 side) of the non-light emitting portion R2 of the transparent substrate 11. As described above, in FIG. 2, the light scattering structure 30 is indicated by a one-dot chain line. The light scattering structure 30 is annularly provided on the outer periphery of the sealing member 17 so as to cover all of the electrode portions 21 and 22 and the divided region 20.

  As the light scattering structure 30, for example, a resin paste mixed with Ag fine particles (hereinafter also referred to as Ag paste) or a glass having random irregularities formed on the surface by sandblasting (hereinafter also referred to as ground glass) is used. be able to.

  When the electrode parts 21 and 22 are provided so that a part of the back surface 13 of the transparent substrate 11 is exposed, the light scattering structure 30 may be provided so as to fill the exposed part. In this case, in the part where the back surface 13 of the transparent substrate 11 is exposed, a part of the light scattering structure 30 and the back surface 13 of the transparent substrate 11 come into contact with each other.

  Here, the light scattering in the present invention means scattering when light is reflected, and the degree of light scattering can be defined by measuring the haze value. The haze value is defined as the ratio of the amount of light included in the incident light other than ± 2.5 ° of the regular reflection of the light reflected by the reflecting surface. In the present invention, the haze value of the light scattering structure 30 is preferably 80% or more, and more preferably 90% or more. The light scattering structure 30 in the present invention is a structure for realizing such light scattering.

  In the non-light emitting portion R2 of the transparent substrate 11 and its vicinity, there is a difference in refractive index between the transparent substrate 11 and each layer on the front surface 12 side and the back surface 13 side. If the light scattering structure 30 is not provided, a part of the light incident on the transparent substrate 11 from the organic layer 15 through the back surface 13 of the transparent substrate 11 is entirely inside the non-light emitting portion R2 and the transparent substrate 11 in the vicinity thereof. The light is reflected and confined inside the transparent substrate 11 or emitted from the back surface 13 side.

  For the purpose of extracting these lights from the surface 12 (light emitting surface) side, Japanese Patent Laying-Open No. 2011-243448 (Patent Document 1) discloses a configuration using a light reflecting layer made of a mirror metal film. . However, even if the light confined inside the transparent substrate 11 is reflected by the light reflecting layer, only a certain angle change occurs at the time of reflection. Therefore, in the configuration using the light reflecting layer as in the same publication (Patent Document 1), the light confined inside the transparent substrate 11 cannot be effectively extracted from the surface 12 (light emitting surface) side.

  In the organic EL module 100 of the present embodiment, when the light confined inside the transparent substrate 11 is reflected by the light scattering structure 30, the light is scattered by contact with the light scattering structure 30. The traveling direction of the light is greatly changed by the scattering, and the light is positively guided toward the non-light emitting portion R2. Most of the light confined in the non-light emitting portion R2 of the transparent substrate 11 and the vicinity thereof is extracted outside through the non-light emitting portion R2. Therefore, according to the organic EL module 100 in the present embodiment, it is possible to efficiently extract the light generated in the organic layer 15 from the non-light emitting portion R2.

  Further, when the organic EL module 100 (see FIG. 1) in which the plurality of organic EL panels 10 are arranged is viewed from the surface 12 (light emission surface) side, the luminance of the light emitted from the light emitting unit R1 and the non-light emitting unit. By reducing the difference from the luminance of light emitted from R2, it becomes possible to improve the uniformity of the luminance of light emitted from the light emitting surface and make the presence of the non-light emitting portion R2 inconspicuous. You can also.

  Although the present embodiment has been described based on nine tiled organic EL panels 10, the present invention can also be applied to an organic EL panel 10 in which an arbitrary number is arranged in the matrix direction. The present invention can also be applied to a configuration in which the organic EL module 100 has one organic EL panel 10. Even when a single organic EL panel 10 is used, it is possible to improve the overall luminance of the light emitting surface by efficiently extracting light from the non-light emitting portion R2.

(First modification)
With reference to FIG. 4, a light extraction structure 32 may be provided in the non-light emitting portion R <b> 2 on the surface 12 of the transparent substrate 11. By providing the light extraction structure 32 in the non-light emitting portion R2, it is possible to further improve the light extraction efficiency in the non-light emitting portion R2.

  In the light extraction structure 32, the surface 12 of the transparent substrate 11 corresponding to the non-light emitting portion R2 is processed into a microlens array shape, or a so-called condensing sheet or prism sheet is further added to the processed portion in the microlens array shape. It is configured by pasting. By providing the light extraction structure 32, the light generated in the organic layer 15 and incident on the inside of the transparent substrate 11 is condensed in a specific direction (for example, the front direction with respect to the light emitting surface), and is in a specific direction. The brightness can be increased.

  As a processing example of the microlens array, a quadrangular pyramid having a side of 30 μm and an apex angle of 90 degrees is two-dimensionally arranged on the surface 12 (light emitting surface) side of the transparent substrate 11. One side is preferably 10 μm to 100 μm. If it is 10 μm or more, the diffraction effect and coloring hardly occur, and if it is 100 μm or less, the thickness can be reduced.

  As the condensing sheet, for example, a sheet that is put into practical use in an LED backlight of a liquid crystal display device can be used. Specifically, a brightness enhancement film (BEF) manufactured by Sumitomo 3M Limited can be used.

  As the prism sheet, for example, the substrate may have a triangular stripe with a vertex angle of 90 degrees and a pitch of 50 μm, a shape with a rounded vertex angle, a shape in which the pitch is changed randomly, Alternatively, other shapes may be used. Moreover, in order to control the light radiation angle in a light radiation surface, you may use a light-diffusion plate or a light-diffusion film together with a condensing sheet. As the light diffusion film, for example, a diffusion film (Light Up (registered trademark)) manufactured by Kimoto Co., Ltd. can be used.

(Second modification)
With reference to FIG. 5, the light extraction structure 32 may be provided on the entire surface 12 of the transparent substrate 11. By providing the light extraction structure 32 over the entire surface 12 of the transparent substrate 11, the light extraction efficiency of the entire light emission surface can be improved.

[Experimental example]
With reference to FIGS. 6-16, the experiment example conducted regarding this invention is demonstrated. The experimental example includes Examples 1 to 6 and Comparative Examples 1 and 2. In Examples 1 to 6 and Comparative Examples 1 and 2, organic EL panels 10A to 10H (see FIGS. 8 to 15) were used, and the luminances of these light emitting portions R1 and non-light emitting portions R2 were measured.

  The basic configuration of the organic EL panels 10A to 10H is common to the organic EL panel 10 shown in FIG. Differences between the organic EL panels 10A to 10H and the organic EL panel 10 will be described later with reference to FIGS. FIG. 7 is an enlarged view showing a region surrounded by the line VII in FIG.

  Referring to FIG. 6, the organic EL panel 10 includes a 99 mm × 99 mm transparent substrate, on which an anode (transparent electrode), an organic layer, and a cathode are sequentially formed. The anode, the organic layer, and the cathode are sealed with a sealing member. The size of the light emitting portion R1 in the surface 12 of the organic EL panel 10 is 90 mm × 90 mm. The width W (see FIG. 7) of the non-light emitting portion R2 in the surface 12 of the organic EL panel 10 is 4.5 mm from the end surface from the transparent substrate 11. As described above, these configurations are common in the organic EL panels 10A to 10H.

  The organic EL panels 10 </ b> A to 10 </ b> H are supplied one by one with a constant current of 100 mA as a drive current in a state where they are arranged one by one in the darkroom. In the state where each of the organic EL panels 10A to 10H was caused to emit light, the luminance in the non-light emitting portion R2 and the light emitting portion R1 was measured. The luminance was measured using CS100A manufactured by Konica Minolta Sensing Co., Ltd. In the non-light emitting portion R2, the luminance at the measurement point 50 shown in FIG. 7 was measured. The measurement point 50 is located near the end face of the transparent substrate and has a size of φ1.5 mm.

Example 1
With reference to FIG. 8, in Example 1, the organic EL panel 10A was used. In the organic EL panel 10 </ b> A, the light scattering structure 30 is provided on the opposite side (back surface 13 side) of the non-light emitting portion R <b> 2 of the transparent substrate 11. As the light scattering structure 30, Ag paste (see FIG. 16) was used as a resin paste mixed with Ag fine particles.

(Example 2)
With reference to FIG. 9, in Example 2, the organic EL panel 10B was used. The organic EL panel 10 </ b> B is provided with a light scattering structure 30 on the opposite side (back surface 13 side) of the non-light emitting portion R <b> 2 of the transparent substrate 11. As the light scattering structure 30, Ag paste (see FIG. 16) was used. In the organic EL panel 10 </ b> B, a light extraction structure 32 is also provided on the entire surface 12 of the transparent substrate 11. As the light extraction structure 32, a diffusion film “Light Up (registered trademark) 100NSH” manufactured by Kimoto Co., Ltd. was used. This diffusion film was attached to the surface 12 of the transparent substrate 11 using matching oil having a refractive index of 1.51.

  The diffusion film “Light Up (registered trademark) 100NSH” manufactured by Kimoto Co., Ltd. has a configuration in which a diffusion layer in which diffusion beads are dispersed is laminated on a 100 μm PET substrate. The total light transmittance from the back surface of the PET substrate is 82.5%, and the haze value is 92%.

(Example 3)
Referring to FIG. 10, in Example 3, an organic EL panel 10C was used. In the organic EL panel 10 </ b> C, the light scattering structure 30 is provided on the opposite side (back surface 13 side) of the non-light emitting portion R <b> 2 of the transparent substrate 11. As the light scattering structure 30, Ag paste (see FIG. 16) was used. In the organic EL panel 10 </ b> C, the light extraction structure 32 is provided only in the non-light emitting portion R <b> 2 on the surface 12 of the transparent substrate 11. As the light extraction structure 32, a diffusion film “Light Up (registered trademark) 100NSH” manufactured by Kimoto Co., Ltd. was used. This light extraction sheet was attached to the surface 12 of the transparent substrate 11 using matching oil having a refractive index of 1.51.

Example 4
Referring to FIG. 11, in Example 4, an organic EL panel 10D was used. The organic EL panel 10 </ b> D is provided with a light scattering structure 31 on the opposite side (back surface 13 side) of the non-light emitting portion R <b> 2 of the transparent substrate 11. As the light scattering structure 31, frosted glass (see FIG. 16) was used as a glass having random irregularities formed on the surface by sandblasting.

(Example 5)
With reference to FIG. 12, in Example 5, the organic EL panel 10E was used. The organic EL panel 10 </ b> E is provided with a light scattering structure 31 on the opposite side (back surface 13 side) of the non-light emitting portion R <b> 2 of the transparent substrate 11. As the light scattering structure 31, ground glass (see FIG. 16) was used. In the organic EL panel 10 </ b> E, a light extraction structure 32 is also provided on the entire surface 12 of the transparent substrate 11. As the light extraction structure 32, a diffusion film “Light Up (registered trademark) 100NSH” manufactured by Kimoto Co., Ltd. was used. This light extraction sheet was attached to the surface 12 of the transparent substrate 11 using matching oil having a refractive index of 1.51.

(Example 6)
With reference to FIG. 13, in Example 6, the organic EL panel 10F was used. The organic EL panel 10 </ b> F is provided with a light scattering structure 31 on the opposite side (back surface 13 side) of the non-light emitting portion R <b> 2 of the transparent substrate 11. As the light scattering structure 31, ground glass (see FIG. 16) was used. In the organic EL panel 10 </ b> F, the light extraction structure 32 is provided only in the non-light emitting portion R <b> 2 on the surface 12 of the transparent substrate 11. As the light extraction structure 32, a diffusion film “Light Up (registered trademark) 100NSH” manufactured by Kimoto Co., Ltd. was used. This light extraction sheet was attached to the surface 12 of the transparent substrate 11 using matching oil having a refractive index of 1.51.

(Comparative Example 1)
Referring to FIG. 14, in Comparative Example 1, an organic EL panel 10G was used. The organic EL panel 10G is configured in the same manner as the organic EL panel 10 shown in FIG. 6, does not include a light scattering structure, and does not include a light extraction structure.

(Comparative Example 2)
Referring to FIG. 15, in Comparative Example 2, the organic EL panel 10H was used. The organic EL panel 10 </ b> H is provided with a glass 35 having a mirror reflection structure (light reflection layer) on which 100 μm of Al is deposited on the opposite side (back surface 13 side) of the non-light emitting portion R <b> 2 of the transparent substrate 11.

(Experimental result)
FIG. 16 is a diagram showing the results of measuring the luminance in each of the light emitting part R1 and the non-light emitting part R2 of the organic EL panels 10A to 10H. In FIG. 16, for convenience, the light reflecting layer in Comparative Example 2 also has a light scattering structure in terms of items, but the light reflecting layer in Comparative Example 2 does not have a light scattering structure. The ratio column in FIG. 16 shows relative values when the luminance in the non-light emitting portion R2 of Comparative Example 1 is set to 100.

  According to the configurations of Examples 1 to 6, it can be seen that higher luminance in the non-light emitting portion R2 can be obtained as compared with Comparative Examples 1 and 2. In addition, as the light scattering structure (light scattering structures 30, 31), it can be seen that Ag paste can obtain higher light extraction efficiency in the non-light emitting portion R2 than ground glass. Further, as the light extraction structure 32, it is possible to obtain higher light extraction efficiency in the non-light emitting portion R2 when it is provided only on the non-light emitting portion R2 of the transparent substrate 11 than when provided on the entire surface of the transparent substrate 11. Recognize.

  It can be seen that when the light extraction structure 32 is provided on the entire surface 12 of the transparent substrate 11, the luminance of the light emitting portion R1 is greatly increased. Therefore, it can be seen that the light extraction structure 32 is preferably provided within a predetermined range so that the luminance difference between the light emitting portion R1 and the non-light emitting portion R2 does not become too large.

  The embodiment and each example based on the present invention have been described above, but the embodiment and each example disclosed this time are illustrative in all points and are not restrictive. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  10, 10A, 10B, 10C, 10D, 10E, 10F, 10G, 10H Organic EL panel, 11 transparent substrate, 12 surface, 13 back surface, 14 anode, 15 organic layer, 16 cathode, 17 sealing member, 18 insulating layer, 20 divided regions, 21, 22 electrode portions, 30, 31 light scattering structure, 32 light extraction structure, 35 glass, 50 measurement points, 100 organic EL module, R1 light emitting portion, R2 non-light emitting portion, W width.

Claims (4)

An organic EL panel having an organic layer and a transparent substrate, wherein light incident on the transparent substrate from the organic layer through the back surface of the transparent substrate is emitted from the surface of the transparent substrate;
The surface of the transparent substrate includes a light emitting part from which the light is emitted, and a non-light emitting part located on an outer periphery of the light emitting part,
A light scattering structure is provided on the back side of the non-light emitting portion of the transparent substrate.
Organic EL module. The non-light-emitting portion on the surface of the transparent substrate is provided with a light extraction structure.
The organic EL module according to claim 1. The light extraction structure is provided on the entire surface of the transparent substrate.
The organic EL module according to claim 2. A plurality of the organic EL panels;
The plurality of organic EL panels are arranged in a plane.
The organic EL module according to claim 1.

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