JP2015122270A - Light emitting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a short circuit between adjacent two organic EL panels in a light emitting device in which a plurality of organic EL panels are arrayed.SOLUTION: A light emitting device comprises: an organic EL element 120 formed on a substrate 110; an anode terminal 102 connected to an anode of the organic EL element 120; and a cathode terminal 104 connected to a cathode of the organic EL element 120. Each of the anode terminal 102 and the cathode terminal 104 does not overlap a terminal having reverse polarity of the adjacent organic EL element 120. An anode terminal 102 of some organic EL element 120 does not overlap a cathode terminal 104 of an adjacent organic EL element 120, for example. Similarly, a cathode terminal 104 of some organic EL element 120 does not overlap an anode terminal 102 of an adjacent organic EL element 120.

Description

  The present invention relates to a light emitting device.

  In recent years, an organic EL panel using an organic EL element as a light source has been developed. Since the organic EL element emits surface light and is light, it can be made into a panel.

  In addition, as a document regarding the EL device, there is a technique described in Patent Document 1, for example. In Patent Document 1, the light emitting layer is sealed with a moisture-proof film. And the lead electrode is extended outside from the moisture-proof film.

Japanese Unexamined Patent Publication No. 07-099087

  By arranging a plurality of organic EL panels, one large light emitting device can be formed. In this case, it is necessary to supply power to each terminal of the plurality of organic EL panels. Here, if the terminals of two adjacent organic EL panels are arranged at positions where they overlap each other, there is a risk that the two organic EL panels are short-circuited.

  An example of a problem to be solved by the present invention is to prevent two adjacent organic EL panels from short-circuiting in a light emitting device in which a plurality of organic EL panels are arranged.

The invention according to claim 1 includes a plurality of organic EL panels arranged side by side,
The organic EL panel is
A substrate,
An organic EL element formed on the substrate;
An anode terminal formed on an end of the substrate and connected to an anode of the organic EL element;
A cathode terminal formed at an end of the substrate and connected to a cathode of the organic EL element;
With
Each of the anode terminal and the cathode terminal is a light emitting device that does not overlap with a terminal having a reverse polarity of the organic EL panel located adjacent thereto.

It is a top view which shows the structure of the light-emitting device which concerns on embodiment. It is AA sectional drawing of FIG. 1 is a plan view illustrating a configuration of a light emitting device according to Example 1. FIG. 6 is a plan view illustrating a configuration of a light emitting device according to Example 2. FIG. 6 is a plan view showing a configuration of a light emitting device according to Example 3. FIG. It is a top view of the organic electroluminescent panel used for the light-emitting device shown in FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In all the drawings, the same reference numerals are given to the same components, and the description will be omitted as appropriate.

  FIG. 1 is a plan view showing a configuration of a light emitting device 10 according to the embodiment. FIG. 2 is a cross-sectional view taken along the line AA of FIG. In FIG. 1, the lead-out wirings 122 and 124, the sealing member 130, the anode lead portion 142, and the cathode lead portion 144 are omitted for the sake of explanation. The light emitting device 10 according to the embodiment includes a plurality of organic EL panels 100. In the example shown in the figure, the plurality of organic EL panels 100 are arranged along the first direction (x direction in the figure). However, the plurality of organic EL panels 100 may be further arranged along a second direction (y direction in the figure) orthogonal to the first direction. In this case, the plurality of organic EL panels 100 are arranged to form a matrix.

  The organic EL panel 100 includes a substrate 110, an organic EL element 120, an anode terminal 102, and a cathode terminal 104. The organic EL element 120 is formed on the substrate 110. The anode terminal 102 is connected to the anode of the organic EL element 120, and the cathode terminal 104 is connected to the cathode of the organic EL element 120. Further, neither the anode terminal 102 nor the cathode terminal 104 overlaps with the terminal of reverse polarity that the adjacent organic EL element 120 has. For example, the anode terminal 102 of one organic EL element 120 does not overlap the cathode terminal 104 of the adjacent organic EL element 120. Further, the cathode terminal 104 of one organic EL element 120 does not overlap the anode terminal 102 of the adjacent organic EL element 120. Details will be described below.

  The substrate 110 is a transparent substrate such as a glass substrate or a resin substrate. The substrate 110 may have flexibility. In this case, the thickness of the substrate 110 is, for example, 10 μm or more and 1000 μm or less. Also in this case, the substrate 110 may be formed of either an inorganic material or an organic material.

  The substrate 110 has a polygonal shape such as a rectangle (more specifically, for example, a square). Therefore, the outer shape of the organic EL panel 100 is also a polygon such as a rectangle. The organic EL panel 100 is arranged so that the corners of the organic EL panel 100 are aligned. In other words, the organic EL panel 100 is disposed so that one side of the organic EL panel 100 is opposed to each other (preferably substantially in contact with each other). A side of the organic EL panel 100 that is orthogonal to the one side is located on the same straight line as the side of the organic EL panel 100 located adjacent to the side.

  The organic EL element 120 has a configuration in which an organic layer is sandwiched between a first electrode and a second electrode. The organic layer has a configuration in which a hole transport layer, a light emitting layer, and an electron transport layer are stacked in this order. When the first electrode is an anode, a hole transport layer is formed on the first electrode. When the first electrode is a cathode, an electron transport layer is formed on the first electrode. In addition, the organic layer may have another layer further.

  At least one of the first electrode and the second electrode is a translucent electrode. The remaining electrodes are made of a metal such as Al or Ag. The material of the translucent electrode is, for example, an inorganic material such as ITO (Indium Tin Oxide) or IZO (Indium Zinc Oxide), or a conductive polymer such as a polythiophene derivative. For example, when the organic EL element 120 has a configuration in which a first electrode, an organic layer, and a second electrode are stacked in this order on the substrate 110, the first electrode is a translucent electrode. The second electrode is an electrode that reflects light such as Al.

  The organic EL element 120 is sealed with a sealing member 130. The sealing member 130 is formed of, for example, glass or a thin plate (or foil) of a metal such as stainless steel or Al, and a portion for accommodating the organic EL element 120 is recessed upward. Thereby, a space for accommodating the organic EL element 120 is formed between the sealing member 130 and the substrate 110. A desiccant is disposed in this space. Further, this space may be filled with an adhesive such as epoxy. The edge of the sealing member 130 is fixed to the substrate 110.

  The sealing member 130 may be a film formed by a film forming method. In this case, it is formed using, for example, an ALD (Atomic Layer Deposition) method or a CVD method. When formed by the ALD method, the sealing member 130 is formed of a metal oxide film such as aluminum oxide. When formed by the CVD method, the sealing member 130 is formed of an inorganic insulating film such as a silicon oxide film.

  An anode terminal 102 and a cathode terminal 104 are formed on a portion of the substrate 110 located outside the sealing member 130, for example, an edge portion of the substrate 110. As described above, in the direction along the side where the anode terminal 102 and the cathode terminal 104 are provided on the substrate 110, the cathode terminal 104 of an organic EL panel 100 is different from the anode terminal 102 of the adjacent organic EL panel 100. There is no overlap.

  In the example shown in FIG. 1, neither the anode terminal 102 nor the cathode terminal 104 overlaps the anode terminal 102 and the cathode terminal 104 of the other organic EL elements 120. The anode terminal 102 is provided at least on the first side of the substrate 110 (the side extending in the y direction in FIG. 1), and the cathode terminal 104 is provided on at least the second side of the substrate 110 facing the first side. Is provided. The anode terminal 102 does not overlap the cathode terminal 104 in the direction in which the first side and the second side extend (y direction in FIG. 1). Specifically, the anode terminal 102 and the cathode terminal 104 are provided on the first side and the second side of the substrate 110. In the direction extending to the first side, the anode terminal 102 and the cathode terminal 104 located on the first side are both arranged at positions different from the anode terminal 102 and the cathode terminal 104 located on the second side. ing. In this way, when the organic EL panel 100 is arranged, the anode terminal 102 does not overlap with the cathode terminal 104 included in the adjacent organic EL panel 100.

  The anode terminal 102 is connected to the organic EL element 120 via the lead wiring 122, and the cathode terminal 104 is connected to the organic EL element 120 via the lead wiring 124. The lead wires 122 and 124 are led out of the sealing member 130 from the space sealed by the sealing member 130.

  The organic EL panel 100 further includes an anode lead part 142 and a cathode lead part 144. Each of the anode lead part 142 and the cathode lead part 144 is a terminal formed of a lead frame, and no insulating film is formed thereon. However, an insulating coating may be formed on the anode lead portion 142 and the cathode lead portion 144. One end of each of the anode lead portion 142 and the cathode lead portion 144 has a shape that sandwiches the substrate 110. The cathode lead portion 144 is connected to the cathode terminal 104 and fixed to the substrate 110 by sandwiching the substrate 110 at one end side. The other end sides of the anode lead portion 142 and the cathode lead portion 144 extend to the non-light emitting surface side of the organic EL panel 100. The same applies to the anode lead portion 142.

  As described above, according to the present embodiment, the anode terminal 102 and the cathode terminal 104 are provided on the edge of the substrate 110. For this reason, the width of the non-light emitting region at the edge of the organic EL panel 100 can be reduced. Further, the cathode terminal 104 of an organic EL element 120 does not overlap the anode terminal 102 of the adjacent organic EL panel 100. For this reason, it can suppress that the anode terminal 102 short-circuits with the cathode terminal 104 of the adjacent organic electroluminescent panel 100. FIG. Particularly when the anode lead portion 142 is connected to the anode terminal 102 and the cathode lead portion 144 is connected to the cathode terminal 104 as in the present embodiment, the anode lead portion 142 is connected to the adjacent organic EL panel 100. Short-circuiting with the cathode lead portion 144 can be suppressed.

  In the example shown in FIG. 1, neither the anode terminal 102 nor the cathode terminal 104 overlaps the anode terminal 102 and the cathode terminal 104 of the other organic EL element 120. In this case, the physical interference between the anode lead portions 142 can be suppressed, and the physical interference between the cathode lead portions 144 can also be suppressed.

Example 1
FIG. 3 is a plan view illustrating the configuration of the light emitting device 10 according to the first embodiment. In the light emitting device 10 shown in the figure, the anode terminal 102 overlaps with the anode terminal 102 included in the adjacent organic EL panel 100, and the cathode terminal 104 overlaps with the cathode terminal 104 included in the adjacent organic EL panel 100. Except for this point, the configuration is the same as that of the light emitting device 10 according to the embodiment.

  Also according to this embodiment, the anode terminal 102 can be prevented from being short-circuited with the cathode terminal 104 of the adjacent organic EL panel 100. And it can suppress that the anode lead part 142 short-circuits with the cathode lead part 144 of the adjacent organic electroluminescent panel 100. FIG.

(Example 2)
FIG. 4 is a plan view illustrating the configuration of the light emitting device 10 according to the second embodiment. The light emitting device 10 according to this example has the same configuration as that of the light emitting device 10 according to the embodiment or example 1 except for the relative positions of the plurality of organic EL panels 100. This figure shows a case similar to the embodiment.

  In this embodiment, the organic EL panel 100 is rectangular. The plurality of organic EL panels 100 are arranged along a first direction (x direction in the drawing) and a second direction (y direction in the drawing) orthogonal to the first direction. In the second direction, the plurality of organic EL panels 100 are arranged so that the sides extending in the second direction are positioned in the same straight line. On the other hand, the plurality of organic EL panels 100 are arranged in a staggered manner in the first direction, that is, the direction orthogonal to the side where the anode terminal 102 and the cathode terminal 104 are provided. However, the shift width of the adjacent organic EL panels 100 is equal to or less than the length of the side extending in the second direction in the organic EL panel 100.

  Then, in the direction along the side where the anode terminal 102 and the cathode terminal 104 are provided on the substrate 110, each of the anode terminal 102 and the cathode terminal 104 of an organic EL element 120 is the reverse of the adjacent organic EL element 120. It does not overlap with the polar terminal. In order to do this, the positions of the anode terminal 102 and the cathode terminal 104 on the substrate 110 and the displacement width of the adjacent substrates 110 may be adjusted.

  Also according to this embodiment, the anode terminal 102 can be prevented from being short-circuited with the cathode terminal 104 of the adjacent organic EL panel 100.

(Example 3)
FIG. 5 is a plan view illustrating the configuration of the light emitting device 10 according to the third embodiment. FIG. 6 is a plan view of the organic EL panel 100 used in this embodiment. The light emitting device 10 according to this example has the same configuration as the light emitting device 10 according to the embodiment except for the following points.

  First, the organic EL panel 100 is rectangular. The anode terminal 102 is provided at a corner (first corner) of the substrate 110, and the cathode terminal 104 is provided at a corner (second corner) that is opposite to the first corner of the substrate 110. . For this reason, even if the organic EL panel 100 is arranged side by side, the anode terminal 102 and the cathode terminal 104 do not overlap.

More specifically, the anode terminal 102 and the cathode terminal 104 are provided on each of the four sides of the substrate 110. Along the entire circumference of the substrate 110, the anode terminals 102 and the cathode terminals 104 are provided alternately. In each of the four sides of the substrate 110, the anode terminal 102 is provided on one end side of the side, and the cathode terminal 104 is provided on the other end side of the side. Then, as shown in FIG. 6, the distance L ₁ from the anode terminal 102 to the one end described above is different from the distance L ₂ from the cathode terminal 104 to the other as described above. The difference between L ₁ and L ₂ is larger than the width of the anode terminal 102 and the width of the cathode terminal 104. More specifically, one of the anode terminal 102 and the cathode terminal 104 is located closer to the corner 112 than the other. The difference between L ₁ and L ₂ is larger than the width of the anode terminal 102 and the cathode terminal 104 located near the corner 112. Preferably, the difference between L ₁ and L ₂ is greater than the width of either the anode terminal 102 or the cathode terminal 104.

  As shown in FIG. 5, the plurality of organic EL panels 100 are arranged along a first direction (x direction in the drawing) and a second direction (y direction in the drawing) orthogonal to the first direction. It is out. Specifically, in the first direction, the plurality of organic EL panels 100 are arranged such that the sides extending in the first direction are positioned in the same straight line. Further, in the second direction, the plurality of organic EL panels 100 are arranged such that the sides extending in the second direction are positioned in the same straight line.

  Even if the organic EL panel 100 is arranged as shown in FIG. 5, the anode terminal 102 and the cathode terminal 104 are arranged as described with reference to FIG. 6, so that the anode terminal 102 is the cathode of the adjacent organic EL panel 100. Short-circuiting with the terminal 104 can be suppressed. For this reason, it can suppress that the anode lead part 142 short-circuits with the cathode lead part 144 of the adjacent organic electroluminescent panel 100. FIG.

  As mentioned above, although embodiment and the Example were described with reference to drawings, these are illustrations of this invention and can also employ | adopt various structures other than the above.

DESCRIPTION OF SYMBOLS 10 Light-emitting device 100 Organic EL panel 102 Anode terminal 104 Cathode terminal 110 Substrate 120 Organic EL element 142 Anode lead part 144 Cathode lead part

Claims (6)

Equipped with multiple organic EL panels arranged side by side,
The organic EL panel is
A substrate,
An organic EL element formed on the substrate;
An anode terminal formed on an end of the substrate and connected to an anode of the organic EL element;
A cathode terminal formed at an end of the substrate and connected to a cathode of the organic EL element;
With
The light emitting device in which the anode terminal and the cathode terminal do not overlap with the opposite polarity terminals of the organic EL panel located adjacent to each other. The light-emitting device according to claim 1.
An anode lead portion for connecting the anode terminal to the outside of the organic EL panel;
A cathode lead portion for connecting the cathode terminal to the outside of the organic EL panel;
A light emitting device comprising: The light-emitting device according to claim 2.
The light emitting device in which neither the anode terminal nor the cathode terminal overlaps with either the anode terminal or the cathode terminal of the adjacent organic EL panel. The light emitting device according to claim 3.
The substrate is rectangular;
The anode terminal is provided on a first side of the substrate;
The cathode terminal is provided on a second side of the substrate facing the first side,
The light emitting device, wherein the anode terminal does not overlap the cathode terminal in a direction in which the first side and the second side extend. The light-emitting device according to claim 4.
The anode terminal is provided at a first corner of the substrate;
The light emitting device, wherein the cathode terminal is provided at a second corner portion of the substrate located on a diagonal side of the first corner portion. The light emitting device according to claim 5.
The anode terminal and the cathode terminal are provided on each of the four sides of the substrate, and when along the entire circumference of the substrate, the anode terminal and the cathode terminal are alternately provided,
In each of the four sides, the anode terminal is provided on one end side of the side, the cathode terminal is provided on the other end side of the side, and a distance from the anode terminal to the one end, A light-emitting device in which a difference from a distance from the cathode terminal to the other end is larger than a width of the anode terminal and a width of the cathode terminal.

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