WO2013179482A1 - Organic el light-emitting element and method for manufacturing same - Google Patents
Organic el light-emitting element and method for manufacturing same Download PDFInfo
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- WO2013179482A1 WO2013179482A1 PCT/JP2012/064287 JP2012064287W WO2013179482A1 WO 2013179482 A1 WO2013179482 A1 WO 2013179482A1 JP 2012064287 W JP2012064287 W JP 2012064287W WO 2013179482 A1 WO2013179482 A1 WO 2013179482A1
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title abstract description 11
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- 238000000605 extraction Methods 0.000 claims abstract description 47
- 239000000758 substrate Substances 0.000 claims abstract description 31
- 230000017525 heat dissipation Effects 0.000 claims abstract description 14
- 239000010410 layer Substances 0.000 claims description 40
- 230000005855 radiation Effects 0.000 claims description 12
- 239000012044 organic layer Substances 0.000 claims description 11
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- 238000005452 bending Methods 0.000 claims description 6
- 238000002360 preparation method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 12
- 238000005401 electroluminescence Methods 0.000 description 42
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- 239000002184 metal Substances 0.000 description 12
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- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 2
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 2
- NPNMHHNXCILFEF-UHFFFAOYSA-N [F].[Sn]=O Chemical compound [F].[Sn]=O NPNMHHNXCILFEF-UHFFFAOYSA-N 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 239000007772 electrode material Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- UEEXRMUCXBPYOV-UHFFFAOYSA-N iridium;2-phenylpyridine Chemical compound [Ir].C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1 UEEXRMUCXBPYOV-UHFFFAOYSA-N 0.000 description 2
- 229910044991 metal oxide Inorganic materials 0.000 description 2
- 150000004706 metal oxides Chemical class 0.000 description 2
- BBEAQIROQSPTKN-UHFFFAOYSA-N pyrene Chemical compound C1=CC=C2C=CC3=CC=CC4=CC=C1C2=C43 BBEAQIROQSPTKN-UHFFFAOYSA-N 0.000 description 2
- TVIVIEFSHFOWTE-UHFFFAOYSA-K tri(quinolin-8-yloxy)alumane Chemical compound [Al+3].C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1.C1=CN=C2C([O-])=CC=CC2=C1 TVIVIEFSHFOWTE-UHFFFAOYSA-K 0.000 description 2
- NKEWBOPVULFSFJ-UHFFFAOYSA-N 1,3-dihydroperimidin-2-one Chemical class C1=CC(NC(O)=N2)=C3C2=CC=CC3=C1 NKEWBOPVULFSFJ-UHFFFAOYSA-N 0.000 description 1
- YLYPIBBGWLKELC-RMKNXTFCSA-N 2-[2-[(e)-2-[4-(dimethylamino)phenyl]ethenyl]-6-methylpyran-4-ylidene]propanedinitrile Chemical class C1=CC(N(C)C)=CC=C1\C=C\C1=CC(=C(C#N)C#N)C=C(C)O1 YLYPIBBGWLKELC-RMKNXTFCSA-N 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- NRCMAYZCPIVABH-UHFFFAOYSA-N Quinacridone Chemical class N1C2=CC=CC=C2C(=O)C2=C1C=C1C(=O)C3=CC=CC=C3NC1=C2 NRCMAYZCPIVABH-UHFFFAOYSA-N 0.000 description 1
- KJTLSVCANCCWHF-UHFFFAOYSA-N Ruthenium Chemical compound [Ru] KJTLSVCANCCWHF-UHFFFAOYSA-N 0.000 description 1
- 229910006404 SnO 2 Inorganic materials 0.000 description 1
- BWZNMFIGGHVLSV-UHFFFAOYSA-N [Ru].C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1 Chemical compound [Ru].C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1.C1=CC=CC=C1C1=CC=CC=N1 BWZNMFIGGHVLSV-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 150000001562 benzopyrans Chemical class 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 150000001893 coumarin derivatives Chemical class 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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- GVEPBJHOBDJJJI-UHFFFAOYSA-N fluoranthrene Natural products C1=CC(C2=CC=CC=C22)=C3C2=CC=CC3=C1 GVEPBJHOBDJJJI-UHFFFAOYSA-N 0.000 description 1
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- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 229910052763 palladium Inorganic materials 0.000 description 1
- 125000002080 perylenyl group Chemical group C1(=CC=C2C=CC=C3C4=CC=CC5=CC=CC(C1=C23)=C45)* 0.000 description 1
- CSHWQDPOILHKBI-UHFFFAOYSA-N peryrene Natural products C1=CC(C2=CC=CC=3C2=C2C=CC=3)=C3C2=CC=CC3=C1 CSHWQDPOILHKBI-UHFFFAOYSA-N 0.000 description 1
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- 229920000193 polymethacrylate Polymers 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- PYWVYCXTNDRMGF-UHFFFAOYSA-N rhodamine B Chemical class [Cl-].C=12C=CC(=[N+](CC)CC)C=C2OC2=CC(N(CC)CC)=CC=C2C=1C1=CC=CC=C1C(O)=O PYWVYCXTNDRMGF-UHFFFAOYSA-N 0.000 description 1
- 229910052703 rhodium Inorganic materials 0.000 description 1
- 239000010948 rhodium Substances 0.000 description 1
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- YYMBJDOZVAITBP-UHFFFAOYSA-N rubrene Chemical compound C1=CC=CC=C1C(C1=C(C=2C=CC=CC=2)C2=CC=CC=C2C(C=2C=CC=CC=2)=C11)=C(C=CC=C2)C2=C1C1=CC=CC=C1 YYMBJDOZVAITBP-UHFFFAOYSA-N 0.000 description 1
- 229910052707 ruthenium Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/02—Details
- H05B33/04—Sealing arrangements, e.g. against humidity
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B33/00—Electroluminescent light sources
- H05B33/10—Apparatus or processes specially adapted to the manufacture of electroluminescent light sources
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/84—Passivation; Containers; Encapsulations
- H10K50/841—Self-supporting sealing arrangements
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K50/00—Organic light-emitting devices
- H10K50/80—Constructional details
- H10K50/87—Arrangements for heating or cooling
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- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
[Problem] To provide an organic EL light-emitting element having a high heat dissipation effect, and a method for manufacturing the element. [Solution] A heat dissipating plate (6) is provided on a sealing body (4) for sealing an organic EL element together with a transparent substrate (1). A part of the heat dissipating plate (6) is stretched to form an elastic piece (61), and the elastic piece (61) is in contact with the top of an extraction electrode (2) extracted from the sealing body (4).
Description
本発明は、放熱構造を備えた有機ＥＬ（Electro Luminescence）発光素子及びその製造方法に関する。
The present invention relates to an organic EL (Electro Luminescence) light emitting element having a heat dissipation structure and a method for manufacturing the same.
従来より、温度上昇による品質低下を防止するための放熱構造を備えた有機ＥＬ発光素子が知られている。例えば特許文献１には、有機ＥＬ発光素子が形成された基板を囲む金属フレームと、導電膜に所定電位を供給する端子とを接続する導電テープを備える有機ＥＬ表示装置が開示されている。かかる構成により、端子に生じた熱が導電テープを介して金属フレームに伝達され放熱される。また、特許文献２には、基板上に成膜された素子電極と、有機ＥＬ発光素子上に設けられた封止基板裏面の導電膜とを接続するために、当該封止基板にスルーホールが形成された有機ＥＬ発光パネルが開示されている。素子電極と導電膜とはスルーホールに充填された導電性物質を介して電気的に接続されており、発光パネルの発熱を効果的に放熱することができる。
Conventionally, an organic EL light emitting element having a heat dissipation structure for preventing quality deterioration due to temperature rise is known. For example, Patent Document 1 discloses an organic EL display device including a conductive tape that connects a metal frame surrounding a substrate on which an organic EL light emitting element is formed and a terminal that supplies a predetermined potential to the conductive film. With this configuration, heat generated in the terminal is transmitted to the metal frame via the conductive tape and radiated. In Patent Document 2, a through hole is formed in the sealing substrate in order to connect the element electrode formed on the substrate and the conductive film on the back surface of the sealing substrate provided on the organic EL light emitting element. A formed organic EL light emitting panel is disclosed. The element electrode and the conductive film are electrically connected via a conductive material filled in the through hole, and can effectively dissipate heat generated by the light-emitting panel.
しかしながら、特許文献１に開示されている有機ＥＬ表示装置には、導通のための専用部材である導電テープが必要となる。また、特許文献１の図５Ｂのように示されるように導電テープを端子から金属フレームまで巻き込むように配置する工程が必要となるので、手間が掛かりコストもが増加してしまう。
However, the organic EL display device disclosed in Patent Document 1 requires a conductive tape that is a dedicated member for conduction. Further, as shown in FIG. 5B of Patent Document 1, a step of arranging the conductive tape so as to be wound from the terminal to the metal frame is required, which takes time and increases the cost.
また、特許文献２に開示されている有機ＥＬ発光パネルには、スルーホール及びこれに充填される導電性物質が必要となる。また、封止基板にスルーホールを形成するための工程、及びスルーホールに導電性物質を充填して素子電極と導電膜とを電気的に接続する工程が必要となるので、手間が掛かりコストも増加してしまう。
In addition, the organic EL light emitting panel disclosed in Patent Document 2 requires a through hole and a conductive material filled therein. In addition, since a process for forming a through hole in the sealing substrate and a process for electrically connecting the element electrode and the conductive film by filling the through hole with a conductive substance are required, it takes time and cost. It will increase.
本発明は上記した如き問題点に鑑みてなされたものであって、放熱効果が高く且つ簡単な放熱構造を有する有機ＥＬ発光素子及びかかる素子の製造方法を提供することを目的とする。
The present invention has been made in view of the above-described problems, and an object thereof is to provide an organic EL light-emitting element having a high heat dissipation effect and a simple heat dissipation structure, and a method for manufacturing such an element.
本発明による有機ＥＬ発光素子は、透明基板と、有機ＥＬ発光層を含む有機層及びこれを挟む第１及び第２電極層からなり前記透明基板上に設けられた発光部と、前記発光部を封止する封止体と、前記第１及び第２電極層のうちの少なくとも一方から前記封止体の外側に引き出された引出し電極と、前記封止体の外面上に接着剤又は両面テープを介して接着された放熱板と、を含む有機ＥＬ発光素子であって、前記放熱板の一部であって前記放熱板と前記引出し電極との間の空間に架設された弾性片を含むことを特徴とする。
An organic EL light emitting device according to the present invention comprises a transparent substrate, an organic layer including an organic EL light emitting layer and first and second electrode layers sandwiching the organic layer, a light emitting portion provided on the transparent substrate, and the light emitting portion. A sealing body to be sealed, an extraction electrode drawn to the outside of the sealing body from at least one of the first and second electrode layers, and an adhesive or a double-sided tape on the outer surface of the sealing body An organic EL light-emitting element including a heat sink bonded through an elastic piece, which is a part of the heat sink and includes an elastic piece installed in a space between the heat sink and the extraction electrode. Features.
本発明による有機ＥＬ発光素子製造方法は、透明基板と、有機ＥＬ発光層を含む有機層及びこれを挟む第１及び第２電極層からなり前記透明基板上に設けられた発光部と、前記発光部を封止する封止体と、前記第１及び第２電極層のうちの少なくとも一方から前記封止体の外側に引き出された引出し電極と、を含む有機ＥＬ発光構造体を有する有機ＥＬ発光素子を製造する有機ＥＬ発光素子製造方法であって、前記有機ＥＬ発光構造体と、一部に弾性片を有する放熱板と、を準備する準備ステップと、前記弾性片の端部のみが前記引出し電極に接触するように前記放熱板を前記封止体の外面に接着する接着ステップと、を含むことを特徴とする。
The organic EL light emitting device manufacturing method according to the present invention includes a transparent substrate, an organic layer including an organic EL light emitting layer, and a first and second electrode layers sandwiching the organic layer, a light emitting portion provided on the transparent substrate, and the light emission. EL light emitting device having an organic EL light emitting structure including a sealing body that seals a portion, and an extraction electrode that is drawn out from at least one of the first and second electrode layers to the outside of the sealing body An organic EL light emitting device manufacturing method for manufacturing an element, comprising: a preparation step of preparing the organic EL light emitting structure and a heat dissipation plate having an elastic piece in part; and only an end of the elastic piece is the drawer An adhesion step of adhering the heat radiating plate to an outer surface of the sealing body so as to be in contact with an electrode.
以下、本発明に係る実施例について添付の図面を参照しつつ詳細に説明する。
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
図１には、本発明の実施例である有機ＥＬ発光素子１０の構成が示されている。
FIG. 1 shows the configuration of an organic EL light emitting device 10 which is an embodiment of the present invention.
発光部３が透明基板１上に形成されている。発光部３は、図２に示される如く、有機層３１と、これを挟む第１電極層（陽極）３２及び第２電極層（陰極）３３とからなる。発光部３は、第１電極層３２が透明基板１側、第２電極層３３が透明基板１と反対側となるように形成されている。有機層３１は、典型的には、ホール注入層３１ａ、ホール輸送層３１ｂ、発光層３１ｃ、電子輸送層３１ｄ、及び電子注入層３１ｅが積層されて構成される。
The light emitting part 3 is formed on the transparent substrate 1. As shown in FIG. 2, the light emitting unit 3 includes an organic layer 31 and a first electrode layer (anode) 32 and a second electrode layer (cathode) 33 sandwiching the organic layer 31. The light emitting unit 3 is formed such that the first electrode layer 32 is on the transparent substrate 1 side and the second electrode layer 33 is on the opposite side of the transparent substrate 1. The organic layer 31 is typically formed by laminating a hole injection layer 31a, a hole transport layer 31b, a light emitting layer 31c, an electron transport layer 31d, and an electron injection layer 31e.
発光層３１ｃは、有機ＥＬ材料からなる。有機ＥＬ材料としては、例えば、蛍光材料や燐光材料等の任意の公知の材料を適用可能である。
The light emitting layer 31c is made of an organic EL material. As the organic EL material, for example, any known material such as a fluorescent material or a phosphorescent material can be applied.
青色発光を与える蛍光材料としては、例えば、ナフタレン、ペリレン、ピレンなどが挙げられる。緑色発光を与える蛍光材料としては、例えば、キナクリドン誘導体、クマリン誘導体、Ａｌｑ３(tris (8-hydroxy-quinoline) aluminum) などのアルミニウム錯体などが挙げられる。黄色発光を与える蛍光材料としては、例えば、ルブレン、ペリミドン誘導体などが挙げられる。赤色発光を与える蛍光材料としては、例えば、ＤＣＭ（4-(dicyanomethylene)-2-methyl-6-(p-dimethylaminostyryl)-4H-pyran）系化合物、ベンゾピラン誘導体、ローダミン誘導体などが挙げられる。燐光材料としては、例えば、ルテニウム、ロジウム、パラジウムなどが挙げられる。燐光材料として、具体的には、トリス（２－フェニルピリジン）イリジウム（所謂、Ｉｒ（ｐｐｙ）３）、トリス（２－フェニルピリジン）ルテニウム、などが挙げられる。
Examples of fluorescent materials that emit blue light include naphthalene, perylene, and pyrene. Examples of fluorescent materials that give green light emission include quinacridone derivatives, coumarin derivatives, and aluminum complexes such as Alq3 (tris (8-hydroxy-quinoline) aluminum). Examples of fluorescent materials that give yellow light include rubrene and perimidone derivatives. Examples of fluorescent materials that give red light emission include DCM (4- (dicyanomethylene) -2-methyl-6- (p-dimethylaminostyryl) -4H-pyran) compounds, benzopyran derivatives, rhodamine derivatives, and the like. Examples of the phosphorescent material include ruthenium, rhodium, and palladium. Specific examples of the phosphorescent material include tris (2-phenylpyridine) iridium (so-called Ir (ppy) 3), tris (2-phenylpyridine) ruthenium, and the like.
第１電極層３２は光透過性電極層からなり、第２電極層３３は光反射性電極層からなる。光透過性電極材料としては、例えばＩＴＯ(Indium-tin-oxide)やＦＴＯ(fluorine-tin-oxide)が用いられる。また、ＺｎＯ、ＺｎＯ－Ａｌ２Ｏ３（所謂、ＡＺＯ）、Ｉｎ２Ｏ３－ＺｎＯ（所謂、ＩＺＯ）、ＳｎＯ２－Ｓｂ２Ｏ３（所謂、ＡＴＯ）、ＲｕＯ２などの材料を用いることもできる。光反射性電極材料としては、Ａｌ、Ａｇ、ＭｇＡｇ合金などが用いられる。
The first electrode layer 32 is made of a light transmissive electrode layer, and the second electrode layer 33 is made of a light reflective electrode layer. As the light transmissive electrode material, for example, ITO (Indium-tin-oxide) or FTO (fluorine-tin-oxide) is used. A material such as ZnO, ZnO—Al 2 O 3 (so-called AZO), In 2 O 3 —ZnO (so-called IZO), SnO 2 —Sb 2 O 3 (so-called ATO), RuO 2, or the like can also be used. As the light reflective electrode material, Al, Ag, MgAg alloy or the like is used.
透明基板１は、例えばガラスやポリエステル、ポリメタクリレート、ポリカーボネート、又はポリスルホンなどの樹脂フィルムなどの光透過性材料からなる。発光部３から発せられた光は透明基板１を介して出力される。
The transparent substrate 1 is made of a light transmissive material such as a resin film such as glass, polyester, polymethacrylate, polycarbonate, or polysulfone. The light emitted from the light emitting unit 3 is output through the transparent substrate 1.
封止缶４は、中空部４１を有する中空封止体であり、発光部３の周囲において透明基板１上に接触して、その中空部４１内に透明基板１上の発光部３を封止する。封止体４は平坦な外面４ａ（以下、底面４ａと称する）を有している。底面４ａは、透明基板１の表面に対して平行又は略平行に形成され得る。封止体４の側面４ｂの縁が封止缶接着層７により透明基板１上に接着固定されている。封止缶４は、例えばプラスチックなどの合成樹脂、又はガラスやステンレンスなどの金属からなる。なお、封止方法は中空封止に限定されず、例えば固体封止や膜封止でも良い。なお、放熱板６を接着する際に放熱板６に加えた圧力が有機ＥＬ発光素子１０に伝わらないようにするためには、中空封止にすることが望ましい。
The sealing can 4 is a hollow sealing body having a hollow portion 41, contacts the transparent substrate 1 around the light emitting portion 3, and seals the light emitting portion 3 on the transparent substrate 1 in the hollow portion 41. To do. The sealing body 4 has a flat outer surface 4a (hereinafter referred to as a bottom surface 4a). The bottom surface 4 a can be formed parallel or substantially parallel to the surface of the transparent substrate 1. The edge of the side surface 4 b of the sealing body 4 is bonded and fixed on the transparent substrate 1 by the sealing can adhesive layer 7. The sealing can 4 is made of, for example, a synthetic resin such as plastic, or a metal such as glass or stainless steel. In addition, the sealing method is not limited to hollow sealing, For example, solid sealing and film | membrane sealing may be sufficient. In order to prevent the pressure applied to the heat radiating plate 6 from being transmitted to the organic EL light emitting element 10 when the heat radiating plate 6 is bonded, it is desirable to use a hollow seal.
引出し電極２は、電源等の外部回路（図示せず）と発光部３の電極層（図２の陽極３２又は陰極３３）とを電気的に接続するための電極である。引出し電極２は、発光部３の電極層から封止缶接着層７を介して封止缶４の外に引き出されている。例えば、外部回路である電源（図示せず）から引出し電極２を介して発光部３の電極層に電源供給される。なお、引出し電極２は透明でも不透明でも良い。引出し電極２は、例えばＩＴＯ(Indium-tin-oxide)、ＦＴＯ(fluorine-tin-oxide)、ＡｌやＡｇを用いて形成され得る。
The extraction electrode 2 is an electrode for electrically connecting an external circuit (not shown) such as a power source and the electrode layer (the anode 32 or the cathode 33 in FIG. 2) of the light emitting unit 3. The extraction electrode 2 is drawn out of the sealing can 4 from the electrode layer of the light emitting unit 3 through the sealing can adhesive layer 7. For example, power is supplied to the electrode layer of the light emitting unit 3 from the power source (not shown) as an external circuit via the extraction electrode 2. The extraction electrode 2 may be transparent or opaque. The extraction electrode 2 can be formed using, for example, ITO (Indium-tin-oxide), FTO (fluorine-tin-oxide), Al, or Ag.
放熱板６は、発光部３において発生した熱を放熱するための部材であり、放熱部６０と弾性片６１とからなる。放熱部６０は、板状に形成されており、片面が金属板接着層５により封止缶４の底面４ａに接着されている。放熱効果を高める観点からは、放熱部６０は、封止缶４の底面４ａ全体に亘って形成されていることが望ましい。弾性片６１は、放熱部６０と引出し電極２との間の空間に架設されている。弾性片６１は、２つの屈曲部６１１及び６１２と接触部６１３とを有している。接触部６１３は、屈曲部６１１及び６１２の少なくとも一方によって生じる弾性によって引出し電極２に押し付けられ、引出し電極２に確実に接触している。この時、弾性力により弾性片６１は変形するため、封止缶の側面４ｂと弾性片６１との間には空間が生じる。
The heat radiating plate 6 is a member for radiating heat generated in the light emitting unit 3, and includes a heat radiating unit 60 and an elastic piece 61. The heat dissipating part 60 is formed in a plate shape, and one surface thereof is bonded to the bottom surface 4 a of the sealing can 4 by the metal plate adhesive layer 5. From the viewpoint of enhancing the heat dissipation effect, the heat dissipation portion 60 is desirably formed over the entire bottom surface 4a of the sealing can 4. The elastic piece 61 is installed in the space between the heat radiation part 60 and the extraction electrode 2. The elastic piece 61 has two bent portions 611 and 612 and a contact portion 613. The contact portion 613 is pressed against the extraction electrode 2 by elasticity generated by at least one of the bent portions 611 and 612, and reliably contacts the extraction electrode 2. At this time, since the elastic piece 61 is deformed by the elastic force, a space is generated between the side surface 4 b of the sealing can and the elastic piece 61.
放熱部６０及び弾性片６１は、例えばアルミニウムや銅などの金属からなる。放熱部６０と弾性片６１とは一体形成され得る。また、弾性片６１は放熱板６の一部であり得る。この場合、放熱板６の一部が放熱部６０の辺から封止缶４の側面外側に延伸して屈曲部６１１及び６１２と接触部６１３とを形成しており、その延伸部分の端部に位置する接触部６１３が引出し電極２に接触しているということもできる。なお、防錆や絶縁のために、放熱板６の表面は樹脂や酸化膜によって皮膜されていても良い。放熱効率を上げるために、放熱部６０の上面が凹凸状に加工されていても良い。また、放熱板６は、セラミックスなどの金属酸化物を用いて形成され得る。また、放熱板６は、金属や金属酸化物に限られず、熱伝導性の高い材料を用いることができる。
The heat radiation part 60 and the elastic piece 61 are made of a metal such as aluminum or copper, for example. The heat radiation part 60 and the elastic piece 61 can be integrally formed. The elastic piece 61 may be a part of the heat sink 6. In this case, a part of the heat radiating plate 6 extends from the side of the heat radiating portion 60 to the outside of the side surface of the sealing can 4 to form the bent portions 611 and 612 and the contact portion 613, and at the end of the extended portion. It can also be said that the contact portion 613 located is in contact with the extraction electrode 2. In addition, the surface of the heat sink 6 may be coated with a resin or an oxide film for rust prevention or insulation. In order to increase the heat dissipation efficiency, the upper surface of the heat dissipation portion 60 may be processed into an uneven shape. Moreover, the heat sink 6 can be formed using metal oxides, such as ceramics. Moreover, the heat sink 6 is not limited to metal or metal oxide, and a material having high thermal conductivity can be used.
図３には、弾性片６１付近の斜視図が示されている。弾性片６１は放熱部６０の一部として形成されており、弾性片６１の先端又は先端付近に位置する接触部６１３が引出し電極２に接触している。熱伝導性を高める観点からは、接触部６１３が引出し電極２に面接触していることが好ましい。接触部６１３は、屈曲部６１１及び６１２の少なくとも一方によって生じる弾性によって引出し電極２に押し付けられて接触している。図３に示されるように、２つ以上の弾性片６１が形成されていて、接触部６１３の各々が別個に引出し電極２に接触していても良い。
FIG. 3 shows a perspective view of the vicinity of the elastic piece 61. The elastic piece 61 is formed as a part of the heat radiating part 60, and the contact part 613 located at or near the tip of the elastic piece 61 is in contact with the extraction electrode 2. From the viewpoint of increasing the thermal conductivity, the contact portion 613 is preferably in surface contact with the extraction electrode 2. The contact portion 613 is pressed against and brought into contact with the extraction electrode 2 by elasticity generated by at least one of the bent portions 611 and 612. As shown in FIG. 3, two or more elastic pieces 61 may be formed, and each of the contact portions 613 may be in contact with the extraction electrode 2 separately.
上記したように、本実施例の有機ＥＬ発光素子１０においては、封止缶４の底面４ａ上に放熱部６０が設けられると共に、発光部３の電極層３２又は３３（図２）のうちの一方から引き出された引出し配線２と放熱部６０とを繋ぐ弾性片６１が設けられている。発光部３において発生した熱は、封止缶４内の中空部４１又は封止缶接着層７を介して封止缶４に伝達されて放熱部６０によって放熱されると共に、引出し配線２及び弾性片６１を介して放熱部６０に伝達されて放熱される。かかる構成により、発光部３の放熱効果を高めることができる。特に、電極層は中空部４１や封止缶接着層７よりも熱伝導率が高いため、発光部３で生じた熱を効果的に放熱することができる。
As described above, in the organic EL light emitting device 10 of the present embodiment, the heat radiating portion 60 is provided on the bottom surface 4a of the sealing can 4 and the electrode layer 32 or 33 (FIG. 2) of the light emitting portion 3 is provided. An elastic piece 61 is provided to connect the lead-out wiring 2 drawn from one side and the heat radiating portion 60. The heat generated in the light emitting part 3 is transmitted to the sealing can 4 through the hollow part 41 in the sealing can 4 or the sealing can adhesive layer 7 and is radiated by the heat radiating part 60, and the drawing wiring 2 and elasticity It is transmitted to the heat radiating part 60 through the piece 61 and radiated. With this configuration, the heat dissipation effect of the light emitting unit 3 can be enhanced. In particular, since the electrode layer has a higher thermal conductivity than the hollow portion 41 and the sealing can adhesive layer 7, the heat generated in the light emitting portion 3 can be effectively radiated.
本実施例の有機ＥＬ発光素子１０においては、例えば特許文献１の導電テープのような別部品を必要とせず、その別部品を敷設する工程も要しないので低コストで簡単に製造できるという利点がある。また、本実施例の有機ＥＬ発光素子１０においては、例えば特許文献２のように基板にスルーホールを設けて導電性物質を充填する必要がないので、基板の材質を問わないし、製造プロセスを簡単にできるという効果も奏する。
In the organic EL light emitting device 10 of the present embodiment, there is an advantage that it is easy to manufacture at low cost because it does not require a separate part such as the conductive tape of Patent Document 1 and does not require a process of laying the separate part. is there. Further, in the organic EL light emitting device 10 of the present embodiment, there is no need to provide a through hole in the substrate and fill it with a conductive material as in Patent Document 2, for example, regardless of the material of the substrate, and the manufacturing process is simplified. There is also an effect that can be made.
なお、図４（ａ）に示されるように、引出し配線２（図１及び図３）が、四角形の放熱部６０の一辺のみから引き出されている場合には、弾性片６１も当該一辺にのみ設けられる。図４（ｂ）又は図４（ｃ）に示されるように、引出し配線２が放熱部６０の二辺以上から引き出されている場合には、弾性片６１も当該二辺以上に設けることができる。また、放熱部６０の一辺につき２以上の引出し配線２が設けられている場合には、当該一辺につき２以上の弾性片６１を設けることができる。このように、引出し配線２の引き出し態様に応じた位置に適当な個数の弾性片６１を設けることによって、発光部３（図１）で生じた熱を放熱部６０に伝達する効果を高め、放熱効果をより向上させることができる。
As shown in FIG. 4A, when the lead-out wiring 2 (FIGS. 1 and 3) is drawn out from only one side of the rectangular heat radiating portion 60, the elastic piece 61 is also only on the one side. Provided. As shown in FIG. 4B or FIG. 4C, when the lead-out wiring 2 is drawn out from two or more sides of the heat radiation part 60, the elastic piece 61 can also be provided on the two or more sides. . In addition, when two or more lead wires 2 are provided for one side of the heat radiating unit 60, two or more elastic pieces 61 can be provided for the one side. Thus, by providing an appropriate number of elastic pieces 61 at positions corresponding to the lead-out mode of the lead-out wiring 2, the effect of transferring the heat generated in the light emitting part 3 (FIG. 1) to the heat radiating part 60 is enhanced. The effect can be further improved.
図５には、弾性片６１の形状の別の一例が示されている。図３における弾性片６１は放熱部６０の辺に対して垂直方向に伸びているが、図５に示されるように放熱部６０の辺に対して平行に設けられても良い。屈曲部６１１ａ及び６１２ａと屈曲部６１１ｂ及び６１２ｂとが互いに逆方向に形成されており、１つの引出し電極２に対して２つの６１３ａ及び６１３ｂが接触している。図３の場合に比較して、封止缶からのはみ出し長さは弾性片６１の幅で決まるため、屈曲部６１１ａ、６１１ｂ、６１２ａ、６１２ｂの曲げ半径が大きい場合であっても省スペースである。
FIG. 5 shows another example of the shape of the elastic piece 61. The elastic piece 61 in FIG. 3 extends in a direction perpendicular to the side of the heat radiating unit 60, but may be provided in parallel to the side of the heat radiating unit 60 as shown in FIG. 5. The bent portions 611a and 612a and the bent portions 611b and 612b are formed in opposite directions, and two 613a and 613b are in contact with one extraction electrode 2. Compared with the case of FIG. 3, the protruding length from the sealing can is determined by the width of the elastic piece 61, so that even when the bending radius of the bent portions 611 a, 611 b, 612 a, and 612 b is large, the space is saved. .
図６には、弾性片６１の断面形状の例が示されている。図６（ａ）に示されるように、弾性片６１は、互いに逆方向に屈曲する２つの屈曲部６１１及び６１２を有することができる。また、図６（ｂ）に示されるように、弾性片６１は、同方向に屈曲する２つの屈曲部６１１及び６１２を有することもできる。また、図６（ｃ）に示されるように、弾性片６１は、１つの屈曲部６１１のみを有することもできる。また、図６（ｄ）に示されるように、弾性片６１は１つの屈曲部６１１のみを有し、接触部６１３が引出し電極２（図１）に対して点接触させるようにすることもできる。また、図６（ｅ）に示されるように、弾性片６１の厚さを放熱部６０の厚さよりも薄くすることもできる。
FIG. 6 shows an example of the cross-sectional shape of the elastic piece 61. As shown in FIG. 6A, the elastic piece 61 can have two bent portions 611 and 612 that are bent in directions opposite to each other. Further, as shown in FIG. 6B, the elastic piece 61 may have two bent portions 611 and 612 that bend in the same direction. Further, as shown in FIG. 6C, the elastic piece 61 can have only one bent portion 611. Further, as shown in FIG. 6D, the elastic piece 61 has only one bent portion 611, and the contact portion 613 can make point contact with the extraction electrode 2 (FIG. 1). . Further, as shown in FIG. 6E, the thickness of the elastic piece 61 can be made thinner than the thickness of the heat radiating portion 60.
図６（ａ）～図６（ｅ）に示されるいずれの形状においても、屈曲部６１１及び／又は屈曲部６１２によって生じる弾性によって接触部６１３が引出し電極２（図１）に押し当てられ、引出し電極２に対して確実に接触することができる。図６（ｄ）に示される形状の場合であれば、例えば曲げ難い金属であっても図７に示されるように接触部６１３を引出し電極２に対して点接触させることができる。接触部６１３は面取りされており、引出し電極２上での可動性が増している。なお、接触部６１３が引出し電極２上に押し当てられることによって、実質的に２つの屈曲部６１１及び６１２が生じることも有り得る。また、図６（ｅ）に示されるように弾性片６１を薄くした場合には、屈曲部６１１及び６１２の曲げ半径が小さくなる。故に、弾性片６１の、放熱部６０の辺に対して垂直な方向の長さＬ１を小さくすることができる。これにより、有機ＥＬ発光素子１０の搭載面積を大きくすることができる。
In any of the shapes shown in FIGS. 6 (a) to 6 (e), the contact portion 613 is pressed against the extraction electrode 2 (FIG. 1) by elasticity generated by the bent portion 611 and / or the bent portion 612. The electrode 2 can be reliably contacted. In the case of the shape shown in FIG. 6 (d), the contact portion 613 can be brought into point contact with the extraction electrode 2 as shown in FIG. The contact portion 613 is chamfered, and the mobility on the extraction electrode 2 is increased. In addition, when the contact part 613 is pressed on the extraction electrode 2, the two bending parts 611 and 612 may substantially occur. In addition, when the elastic piece 61 is thinned as shown in FIG. 6E, the bending radii of the bent portions 611 and 612 are reduced. Therefore, the length L1 of the elastic piece 61 in the direction perpendicular to the side of the heat radiating portion 60 can be reduced. Thereby, the mounting area of the organic EL light emitting element 10 can be increased.
図８には、２つの放熱板（以下、放熱片とも称する）６ａ及び６ｂを有する有機ＥＬ発光素子１０が示されている。放熱板６ａの放熱部６０ａは、封止缶４の底面４ａの一部の領域に接着層５を介して接着されている。放熱板６ｂの放熱部６０ｂは、封止缶４の底面４ａのうちの当該領域以外の領域の一部に接着層５を介して接着されている。放熱部６０ａと放熱部６０ｂとは互いに電気的に絶縁されている。
FIG. 8 shows an organic EL light emitting device 10 having two heat radiating plates (hereinafter also referred to as heat radiating pieces) 6a and 6b. The heat radiating portion 60 a of the heat radiating plate 6 a is bonded to a partial region of the bottom surface 4 a of the sealing can 4 via the adhesive layer 5. The heat radiating portion 60 b of the heat radiating plate 6 b is bonded to a part of the region other than the region of the bottom surface 4 a of the sealing can 4 via the adhesive layer 5. The heat radiation part 60a and the heat radiation part 60b are electrically insulated from each other.
放熱板６ａの弾性片６１ａは、放熱部６０ａと、発光部３の陽極３２（図２）から引き出された引出し電極片２ａとの間の空間に架設されている。弾性片６１ａの一部は引出し電極片２ａに接触している。また、放熱板６ｂの弾性片６１ｂは、放熱部６０ｂと、発光部３の陰極３３（図２）からの引出し電極片２ｂとの間の空間に架設されている。弾性片６１ｂの一部は引出し電極片２ｂに接触している。放熱板６ａと放熱板６ｂとは互いに電気的に絶縁されている。
The elastic piece 61a of the heat radiating plate 6a is installed in a space between the heat radiating portion 60a and the extraction electrode piece 2a drawn from the anode 32 (FIG. 2) of the light emitting portion 3. A part of the elastic piece 61a is in contact with the extraction electrode piece 2a. The elastic piece 61b of the heat radiating plate 6b is installed in a space between the heat radiating portion 60b and the extraction electrode piece 2b from the cathode 33 (FIG. 2) of the light emitting portion 3. A part of the elastic piece 61b is in contact with the extraction electrode piece 2b. The heat sink 6a and the heat sink 6b are electrically insulated from each other.
かかる構成を有する有機ＥＬ発光素子１０によれば、発光部３において生じた熱を陽極３２及び陰極３３（図２）を介して、各々放熱板６ａ及び６ｂによって放熱することができる。それ故、有機ＥＬ発光素子１０の方熱効果をより高めることができる。
According to the organic EL light emitting device 10 having such a configuration, the heat generated in the light emitting unit 3 can be radiated by the heat radiating plates 6a and 6b through the anode 32 and the cathode 33 (FIG. 2), respectively. Therefore, the heat effect of the organic EL light emitting element 10 can be further enhanced.
図９には、有機ＥＬ発光素子１０を上面から見たときの放熱板６ａ及び６ｂの配置の例が示されている。図９（ａ）～図９（ｃ）に示されるように、放熱板６ａと放熱板６ｂとを封止缶４の底面４ａ（図８）上に平行に配置することができる。放熱板６ａと放熱板６ｂとは、封止缶４の底面４ａ上において電気的に絶縁されている。弾性片６１ａ及び６１ｂは、引出し配線２（図１）の引出し位置に応じて自在に設けられる。例えば、図９（ａ）に示されるように、一方の放熱板６ａにおいては放熱部６０ａの長手方向の一方の端部に弾性片６１ａを設け、他方の放熱板６ｂにおいてはこれと反対側の端部に弾性片６１ｂを設けることができる。また、図９（ｂ）に示されるように、一方の放熱板６ａにおいては放熱部６０ａの長手方向の端部に弾性片６１ａを設け、他方の放熱板６ｂにおいてもこれと同じ側の端部に弾性片６１ｂを設けることができる。また、図９（ｃ）に示されるように、一方の放熱板６ａにおいては放熱部６０ａの短手方向の端部に弾性片６１ａを設け、他方の放熱板６ｂにおいてはこれと反対側の端部に弾性片６１ｂを設けることができる。
FIG. 9 shows an example of the arrangement of the heat sinks 6a and 6b when the organic EL light emitting element 10 is viewed from above. As shown in FIGS. 9A to 9C, the heat radiating plate 6a and the heat radiating plate 6b can be arranged in parallel on the bottom surface 4a (FIG. 8) of the sealing can 4. The heat radiating plate 6 a and the heat radiating plate 6 b are electrically insulated on the bottom surface 4 a of the sealing can 4. The elastic pieces 61a and 61b are freely provided according to the drawing position of the drawing wiring 2 (FIG. 1). For example, as shown in FIG. 9 (a), one heat radiating plate 6a is provided with an elastic piece 61a at one end in the longitudinal direction of the heat radiating portion 60a, and the other heat radiating plate 6b is on the opposite side. An elastic piece 61b can be provided at the end. Further, as shown in FIG. 9 (b), one heat radiating plate 6a is provided with an elastic piece 61a at the end in the longitudinal direction of the heat radiating portion 60a, and the other heat radiating plate 6b is also an end on the same side. The elastic piece 61b can be provided on the surface. Further, as shown in FIG. 9 (c), one heat radiating plate 6a is provided with an elastic piece 61a at the end portion in the short direction of the heat radiating portion 60a, and the other heat radiating plate 6b is on the opposite end. The elastic piece 61b can be provided in the part.
また、封止缶４を上面から見たときにその底面４ａ（図８）が四角形である場合、図９（ｄ）及び図９（ｅ）に示されるように、少なくともその四角形の対向する二辺に対応する部分に放熱板６ａ及び／又は放熱板６ｂが存在するように形成することもできる。
Further, when the bottom surface 4a (FIG. 8) is a square when the sealing can 4 is viewed from above, as shown in FIGS. 9 (d) and 9 (e), at least the two opposite sides of the square can be seen. The heat sink 6a and / or the heat sink 6b may be formed in a portion corresponding to the side.
図９（ｄ）の放熱部６０ａは、当該二辺に各々対応する２つの部分とこれをつなぐ部分とからなるコ字型の形状となっている。また、弾性片６１ａ１と弾性片６１ａ２とが、当該二辺に各々対応する２つの部分にそれぞれ設けられている。弾性片６１ａ１を当該二辺のうちの一方の辺から引き出された引出し電極片２ａ（図８）に接触させ、弾性片６１ａ２を他方の辺から引き出された引出し電極片２ｂ（図８）に接触させることができる。この際、弾性片６１ａ１が接触する引出し電極と、弾性片６１ａ２が接触する引出し電極とは同一電極（例えば陽極）である。放熱板６ｂの放熱部６０ｂは、放熱板６ａと電気的に絶縁されるように封止缶４の底面４ａ上に配置される。放熱板６ｂの弾性片６１ｂは、例えば陽極から引き出された引出し電極（図８）に接触させることができる。
9 (d) has a U-shaped shape composed of two portions corresponding to the two sides and a portion connecting the two portions. In addition, the elastic piece 61a1 and the elastic piece 61a2 are provided in two portions respectively corresponding to the two sides. The elastic piece 61a1 is brought into contact with the extraction electrode piece 2a (FIG. 8) drawn from one of the two sides, and the elastic piece 61a2 is brought into contact with the extraction electrode piece 2b (FIG. 8) drawn from the other side. Can be made. At this time, the extraction electrode in contact with the elastic piece 61a1 and the extraction electrode in contact with the elastic piece 61a2 are the same electrode (for example, an anode). The heat radiating portion 60b of the heat radiating plate 6b is disposed on the bottom surface 4a of the sealing can 4 so as to be electrically insulated from the heat radiating plate 6a. The elastic piece 61b of the heat radiating plate 6b can be brought into contact with, for example, an extraction electrode (FIG. 8) extracted from the anode.
図９（ｅ）の放熱部６０ａは、当該二辺に各々対応する２つの部分とこれをつなぐ部分とからなるエ字型の形状となっている。また、弾性片６１ａ１と弾性片６１ａ２とが、当該二辺に各々対応する２つの部分にそれぞれ設けられている。弾性片６１ａ１を当該二辺のうちの一方の辺から引き出された引出し電極片２ａ（図８）に接触させ、弾性片６１ａ２を他方の辺から引き出された引出し電極片２ｂ（図８）に接触させることができる。この際、弾性片６１ａ１が接触する引出し電極と、弾性片６１ａ２が接触する引出し電極とは同一の極（例えば陽極）である。放熱板６ｂの放熱部６０ｂ及び放熱板６ｃの放熱部６０ｃは、放熱板６ａと電気的に絶縁されるように封止缶４の底面４ａ上に配置される。放熱板６ｂの弾性片６１ｂ及び放熱板６ｃの弾性片６１ｃは、例えば陰極から引き出された引出し電極（図８）に接触させることができる。
The heat radiating part 60a in FIG. 9 (e) has an E shape composed of two parts corresponding to the two sides and a part connecting the two parts. In addition, the elastic piece 61a1 and the elastic piece 61a2 are provided in two portions respectively corresponding to the two sides. The elastic piece 61a1 is brought into contact with the extraction electrode piece 2a (FIG. 8) drawn from one of the two sides, and the elastic piece 61a2 is brought into contact with the extraction electrode piece 2b (FIG. 8) drawn from the other side. Can be made. At this time, the extraction electrode in contact with the elastic piece 61a1 and the extraction electrode in contact with the elastic piece 61a2 are the same pole (for example, an anode). The heat radiating portion 60b of the heat radiating plate 6b and the heat radiating portion 60c of the heat radiating plate 6c are disposed on the bottom surface 4a of the sealing can 4 so as to be electrically insulated from the heat radiating plate 6a. The elastic piece 61b of the heat radiating plate 6b and the elastic piece 61c of the heat radiating plate 6c can be brought into contact with, for example, an extraction electrode (FIG. 8) drawn from the cathode.
図９（ｄ）及び図９（ｅ）の場合には、弾性片６１ａ１と弾性片６１ａ２とが同一電極に接続されるので、放熱板６ａは当該電極についての補助電極としての効果も奏する。すなわち、一般に薄膜電極層はシート抵抗が大きいが、電極層と比べて十分な厚さの金属板からなる放熱部６０ａはシート抵抗が非常に小さいため電流が流れやすい。特にＩＴＯなどの透明電極は金属電極よりもシート抵抗が大きいため、補助電極効果も大きくなる。
9D and 9E, since the elastic piece 61a1 and the elastic piece 61a2 are connected to the same electrode, the heat radiating plate 6a also has an effect as an auxiliary electrode for the electrode. That is, in general, the thin film electrode layer has a large sheet resistance, but the heat radiation part 60a made of a metal plate having a sufficient thickness compared to the electrode layer has a very small sheet resistance, so that a current flows easily. In particular, a transparent electrode such as ITO has a larger sheet resistance than a metal electrode, so that the auxiliary electrode effect is also increased.
図１０には、２つの放熱板（放熱片とも称する）６ａ及び６ｂを有する有機ＥＬ発光素子１０が示されている。
FIG. 10 shows an organic EL light-emitting element 10 having two heat radiating plates (also referred to as heat radiating pieces) 6a and 6b.
放熱板６ａの放熱部６０ａは、接着層５１を介して封止缶４の底面４ａに接着されている。放熱板６ａの弾性片６１ａは、放熱部６０ａと、発光部３の陽極３２（図２）からの引出し電極片２ａとの間の空間に架設されている。弾性片６１ａの一部は引出し電極片２ａに接触している。
The heat radiating portion 60 a of the heat radiating plate 6 a is bonded to the bottom surface 4 a of the sealing can 4 via the adhesive layer 51. The elastic piece 61a of the heat radiating plate 6a is installed in a space between the heat radiating part 60a and the extraction electrode piece 2a from the anode 32 (FIG. 2) of the light emitting part 3. A part of the elastic piece 61a is in contact with the extraction electrode piece 2a.
放熱板６ｂの放熱部６０ｂは、接着層５２を介して放熱板６ａの放熱部６０ａの上面に接着されている。放熱板６ｂの弾性片６１ｂは、放熱部６０ｂと、発光部３の陰極３３（図２）からの引出し電極片２ｂとの間の空間に架設されている。弾性片６１ｂの一部は引出し電極片２ｂに接触している。接着層５２は絶縁体であり、放熱板６ａと放熱板６ｂとは互いに電気的に絶縁されている。
The heat radiating portion 60b of the heat radiating plate 6b is bonded to the upper surface of the heat radiating portion 60a of the heat radiating plate 6a through the adhesive layer 52. The elastic piece 61b of the heat radiating plate 6b is installed in a space between the heat radiating portion 60b and the extraction electrode piece 2b from the cathode 33 (FIG. 2) of the light emitting portion 3. A part of the elastic piece 61b is in contact with the extraction electrode piece 2b. The adhesive layer 52 is an insulator, and the heat sink 6a and the heat sink 6b are electrically insulated from each other.
かかる構成を有する有機ＥＬ発光素子１０によれば、発光部３の陽極３２（図２）において生じた熱を一方の放熱板６ａによって放熱し、発光部３の陰極３３（図２）において生じた熱を他方の放熱板６ｂによって放熱することができる。それ故、有機ＥＬ発光素子１０の方熱効果をより高めることができる。
＜有機ＥＬ発光素子の製造方法＞
以下、図１１を参照しつつ、有機ＥＬ発光素子１０の製造工程について説明する。 According to the organic ELlight emitting device 10 having such a configuration, the heat generated in the anode 32 (FIG. 2) of the light emitting unit 3 is radiated by the one heat radiating plate 6a and generated in the cathode 33 (FIG. 2) of the light emitting unit 3. Heat can be radiated by the other heat radiating plate 6b. Therefore, the heat effect of the organic EL light emitting element 10 can be further enhanced.
<Method for Manufacturing Organic EL Light Emitting Element>
Hereinafter, the manufacturing process of the organic ELlight emitting element 10 will be described with reference to FIG.
＜有機ＥＬ発光素子の製造方法＞
以下、図１１を参照しつつ、有機ＥＬ発光素子１０の製造工程について説明する。 According to the organic EL
<Method for Manufacturing Organic EL Light Emitting Element>
Hereinafter, the manufacturing process of the organic EL
先ず、図１１（ａ）に示されるように、板状の放熱部６０及びこれと一体形成された弾性片６１を有する放熱板６と、発光部３が透明基板１上に形成され且つ封止缶４によって封止されている接着前発光素子１１と、を準備する。放熱板６は例えばアルミニウムや銅などの金属からなる。弾性片６１は、屈曲部６１１及び６１２と、接触部６１３とを有するように成形されている。発光部３の電極層（例えば図２の陽極３２）からは、引出し配線２が封止缶接着層７を介して封止缶４の外側に引き出されている。準備後、透明基板１側を下に向けて接着前発光素子１１を台座２０に載置する。台座２０は、後工程のプレスに耐えられる強度を有する例えば金属等の材料からなる。載置時やプレス時における透明基板１の損傷を防止する為に、台座２０の表面には樹脂膜が形成されていても良い。
First, as shown in FIG. 11A, a heat radiating plate 6 having a plate-like heat radiating portion 60 and an elastic piece 61 integrally formed therewith, and a light emitting portion 3 are formed on the transparent substrate 1 and sealed. A pre-adhesion light emitting element 11 sealed with a can 4 is prepared. The heat sink 6 is made of a metal such as aluminum or copper. The elastic piece 61 is formed to have bent portions 611 and 612 and a contact portion 613. From the electrode layer (for example, the anode 32 in FIG. 2) of the light emitting unit 3, the lead wiring 2 is led out to the outside of the sealing can 4 through the sealing can adhesive layer 7. After the preparation, the light emitting element 11 before bonding is placed on the base 20 with the transparent substrate 1 side facing down. The pedestal 20 is made of a material such as metal having a strength that can withstand pressing in a later process. In order to prevent damage to the transparent substrate 1 during mounting or pressing, a resin film may be formed on the surface of the base 20.
次に、図１１（ｂ）に示されるように、封止缶４の底面４ａ上に接着剤を塗布して接着層５を形成する。そして、弾性片６１の接触部６１３が引出し配線２上に接触するように位置合せをして、放熱部６０の接着面６ｃを接着層５上に載せる。更に、プレス板３０放熱部６０の放熱面６ｄ上に載置してプレス板３０上部から圧力をかける。この際、放熱部６０の接着面６ｃと封止缶４の底面４ａとが接着層５を介して接着されると同時に、弾性片６１の接触部６１３が引出し配線２上に押し付けられる。この際、弾性片６１に曲げ応力が生じ、接触部６１３が引出し配線２上に確実に接触する。
Next, as shown in FIG. 11 (b), an adhesive is applied on the bottom surface 4 a of the sealing can 4 to form the adhesive layer 5. Then, alignment is performed so that the contact portion 613 of the elastic piece 61 contacts the lead-out wiring 2, and the adhesive surface 6 c of the heat radiating portion 60 is placed on the adhesive layer 5. Further, the pressure plate 30 is placed on the heat radiating surface 6 d of the heat radiating portion 60 and pressure is applied from above the press plate 30. At this time, the bonding surface 6 c of the heat radiating unit 60 and the bottom surface 4 a of the sealing can 4 are bonded via the bonding layer 5, and at the same time, the contact portion 613 of the elastic piece 61 is pressed onto the lead-out wiring 2. At this time, a bending stress is generated in the elastic piece 61, and the contact portion 613 is reliably in contact with the lead-out wiring 2.
次に、図１１（ｃ）に示されるように、接着層５が硬化してからプレス板３０を取外す。接着剤６が硬化するまで例えば１０分など所定時間だけ待つ。この際、接着剤６の硬化を促進し、密着性を増すために、例えば台座４０側から加熱する等の処理を施しても良い。弾性片６１の接触部６１３は、屈曲部６１１及び６１２によって生じる弾性により引出し配線２上に確実に接触している。
Next, as shown in FIG. 11C, the press plate 30 is removed after the adhesive layer 5 is cured. It waits for a predetermined time such as 10 minutes until the adhesive 6 is cured. At this time, in order to accelerate the curing of the adhesive 6 and increase the adhesion, for example, a treatment such as heating from the base 40 side may be performed. The contact portion 613 of the elastic piece 61 is reliably in contact with the lead-out wiring 2 due to the elasticity generated by the bent portions 611 and 612.
このように、本実施例の有機ＥＬ発光素子１０の製造方法においては、放熱部６０を封止缶４上に設けることと、放熱部６０と引出し電極２とを繋ぐ弾性片６１を設けることとを１つのプレス工程によって同時に実現することができる。有機ＥＬ発光素子１０の発光部３において発生した熱は、封止缶４に伝達されて放熱部６０によって放熱されると共に、引出し配線２及び弾性片６１を介して放熱部６０に伝達されて放熱される。それ故、放熱効果の高い有機ＥＬ発光素子１０を簡単に製造することができる。特に、熱伝導率が高い電極層を介することで効果的に放熱することができる有機ＥＬ発光素子１０を簡単に製造することができる。
Thus, in the manufacturing method of the organic EL light emitting device 10 of the present embodiment, the heat dissipating part 60 is provided on the sealing can 4 and the elastic piece 61 connecting the heat dissipating part 60 and the extraction electrode 2 is provided. Can be realized simultaneously by one pressing step. The heat generated in the light emitting unit 3 of the organic EL light emitting element 10 is transmitted to the sealing can 4 and dissipated by the heat dissipating unit 60, and also transmitted to the heat dissipating unit 60 through the lead-out wiring 2 and the elastic piece 61. Is done. Therefore, the organic EL light emitting device 10 having a high heat dissipation effect can be easily manufactured. In particular, the organic EL light-emitting element 10 that can effectively dissipate heat through an electrode layer having a high thermal conductivity can be easily manufactured.
また、本実施例の製造方法においては、例えば特許文献１の導電テープのような別部品を用いず、その別部品を敷設する工程も無いので低コストで簡単に製造できるという利点もある。また、本実施例の製造方法においては、例えば特許文献２のように基板にスルーホールを設けて導電性物質を充填する工程も不要なので、基板の材質に拘わらず、簡単に製造できるという効果も奏する。
Also, the manufacturing method of the present embodiment has an advantage that it can be easily manufactured at low cost because there is no process of laying the separate part without using another part such as the conductive tape of Patent Document 1. In addition, in the manufacturing method of the present embodiment, there is no need to provide a through hole in the substrate and fill it with a conductive material as in Patent Document 2, for example, so that it is possible to easily manufacture regardless of the material of the substrate. Play.
１ 透明基板
２ 引出し電極
３ 発光部
４ 封止缶
５ 金属板接着層
６ 放熱板
７ 封止缶接着層
１０ 有機ＥＬ発光素子
６０ 放熱部
６１ 弾性片
６１１、６１２ 屈曲部
６１３ 接触部 DESCRIPTION OFSYMBOLS 1 Transparent substrate 2 Lead electrode 3 Light emission part 4 Sealing can 5 Metal plate adhesion layer 6 Heat sink 7 Sealing can adhesion layer 10 Organic EL light emitting element 60 Heat radiation part 61 Elastic piece 611,612 Bending part 613 Contact part
２ 引出し電極
３ 発光部
４ 封止缶
５ 金属板接着層
６ 放熱板
７ 封止缶接着層
１０ 有機ＥＬ発光素子
６０ 放熱部
６１ 弾性片
６１１、６１２ 屈曲部
６１３ 接触部 DESCRIPTION OF
Claims (8)
- 透明基板と、有機ＥＬ発光層を含む有機層及びこれを挟む第１及び第２電極層からなり前記透明基板上に設けられた発光部と、前記発光部を封止する封止体と、前記第１及び第２電極層のうちの少なくとも一方から前記封止体の外側に引き出された引出し電極と、前記封止体の外面上に接着剤又は両面テープを介して接着された放熱板と、を含む有機ＥＬ発光素子であって、
前記放熱板の一部であって前記放熱板と前記引出し電極との間の空間に架設された弾性片を含むことを特徴とする有機ＥＬ発光素子。 A transparent substrate, an organic layer including an organic EL light emitting layer, and a first and second electrode layer sandwiching the organic layer, a light emitting portion provided on the transparent substrate, a sealing body for sealing the light emitting portion, A lead electrode drawn to the outside of the sealing body from at least one of the first and second electrode layers, and a heat radiating plate bonded to the outer surface of the sealing body via an adhesive or a double-sided tape; An organic EL light emitting device containing
An organic EL light emitting device comprising an elastic piece that is a part of the heat radiating plate and is installed in a space between the heat radiating plate and the extraction electrode. - 前記弾性片は、少なくとも１つの屈曲部を有することを特徴とする請求項１に記載の有機ＥＬ発光素子。 The organic EL light-emitting element according to claim 1, wherein the elastic piece has at least one bent portion.
- 前記弾性片の先端部は、前記引出し電極と少なくとも１箇所において接触していることを特徴とする請求項１又は２に記載の有機ＥＬ発光素子。 The organic EL light-emitting element according to claim 1 or 2, wherein the tip of the elastic piece is in contact with the extraction electrode at at least one location.
- 前記放熱板は、互いに絶縁された第１及び第２放熱片を含み、
前記引出し電極は、互いに絶縁され前記第１及び第２電極層に接続された第１及び第２電極片を含み、
前記弾性片は、前記第１放熱片から前記第１電極片に至る第１弾性片と、前記第２放熱片から前記第２電極片に至る第２弾性片と、を含むことを特徴とする請求項１に記載の有機ＥＬ発光素子。 The heat dissipation plate includes first and second heat dissipation pieces that are insulated from each other,
The extraction electrode includes first and second electrode pieces that are insulated from each other and connected to the first and second electrode layers,
The elastic piece includes a first elastic piece extending from the first heat radiating piece to the first electrode piece, and a second elastic piece extending from the second heat radiating piece to the second electrode piece. The organic EL light emitting device according to claim 1. - 前記第１放熱片と前記第２放熱片とが同一平面上に設けられていることを特徴とする請求項４に記載の有機ＥＬ発光素子。 The organic EL light emitting device according to claim 4, wherein the first heat radiation piece and the second heat radiation piece are provided on the same plane.
- 前記第１放熱片と前記第２放熱片とが絶縁層を挟んで積層されていることを特徴とする請求項４に記載の有機ＥＬ発光素子。 The organic EL light-emitting element according to claim 4, wherein the first heat radiation piece and the second heat radiation piece are laminated with an insulating layer interposed therebetween.
- 透明基板と、有機ＥＬ発光層を含む有機層及びこれを挟む第１及び第２電極層からなり前記透明基板上に設けられた発光部と、前記発光部を封止する封止体と、前記第１及び第２電極層のうちの少なくとも一方から前記封止体の外側に引き出された引出し電極と、を含む有機ＥＬ発光構造体を有する有機ＥＬ発光素子を製造する有機ＥＬ発光素子製造方法であって、
前記有機ＥＬ発光構造体と、一部に弾性片を有する放熱板と、を準備する準備ステップと、
前記弾性片の端部のみが前記引出し電極に接触するように前記放熱板を前記封止体の外面に接着する接着ステップと、を含むことを特徴とする有機ＥＬ発光素子製造方法。 A transparent substrate, an organic layer including an organic EL light emitting layer, and a first and second electrode layer sandwiching the organic layer, a light emitting portion provided on the transparent substrate, a sealing body for sealing the light emitting portion, An organic EL light-emitting element manufacturing method for manufacturing an organic EL light-emitting element having an organic EL light-emitting structure including an extraction electrode drawn out from at least one of the first and second electrode layers to the outside of the sealing body. There,
A preparation step of preparing the organic EL light emitting structure and a heat sink having an elastic piece in part,
An organic EL light-emitting element manufacturing method, comprising: an adhesion step of adhering the heat radiating plate to an outer surface of the sealing body so that only an end portion of the elastic piece is in contact with the extraction electrode. - 前記接着ステップにおいては、前記弾性片に曲げ応力が生じるように接着することを特徴とする請求項７に記載の有機ＥＬ発光素子製造方法。 The organic EL light-emitting element manufacturing method according to claim 7, wherein in the bonding step, the elastic pieces are bonded so that bending stress is generated.
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