JP2001237062A - Organic electroluminescent light source - Google Patents
Organic electroluminescent light sourceInfo
- Publication number
- JP2001237062A JP2001237062A JP2000044689A JP2000044689A JP2001237062A JP 2001237062 A JP2001237062 A JP 2001237062A JP 2000044689 A JP2000044689 A JP 2000044689A JP 2000044689 A JP2000044689 A JP 2000044689A JP 2001237062 A JP2001237062 A JP 2001237062A
- Authority
- JP
- Japan
- Prior art keywords
- light source
- organic
- substrate
- organic electroluminescent
- uneven shape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
- 239000000758 substrate Substances 0.000 claims description 24
- 238000005401 electroluminescence Methods 0.000 claims description 5
- 230000005855 radiation Effects 0.000 abstract 1
- 230000000191 radiation effect Effects 0.000 description 7
- 230000005525 hole transport Effects 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- 229910052594 sapphire Inorganic materials 0.000 description 4
- 239000010980 sapphire Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000007850 fluorescent dye Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 239000007983 Tris buffer Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- -1 and for example Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 150000004696 coordination complex Chemical class 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000003446 ligand Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- DCZNSJVFOQPSRV-UHFFFAOYSA-N n,n-diphenyl-4-[4-(n-phenylanilino)phenyl]aniline Chemical compound C1=CC=CC=C1N(C=1C=CC(=CC=1)C=1C=CC(=CC=1)N(C=1C=CC=CC=1)C=1C=CC=CC=1)C1=CC=CC=C1 DCZNSJVFOQPSRV-UHFFFAOYSA-N 0.000 description 1
- 229960003540 oxyquinoline Drugs 0.000 description 1
- MCJGNVYPOGVAJF-UHFFFAOYSA-N quinolin-8-ol Chemical compound C1=CN=C2C(O)=CC=CC2=C1 MCJGNVYPOGVAJF-UHFFFAOYSA-N 0.000 description 1
- 150000003248 quinolines Chemical class 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 238000004528 spin coating Methods 0.000 description 1
- 238000004544 sputter deposition Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 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 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Electroluminescent Light Sources (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、有機エレクトロル
ミネッセンス光源の基板の構造に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of a substrate for an organic electroluminescence light source.
【０００２】[0002]
【従来の技術】従来の有機エレクトロルミネッセンス
（以下、有機ＥＬという）光源については、特開平１０
−１４４４６８にあるような構成である。その概略は、
図３に示すように基板２０１上に有機ＥＬ素子（その積
層構造）２０２が設けられたものであるが、ここで基板
２０１には熱伝導率の高い材質として石英やサファイア
を用いて放熱効果を上げていた。2. Description of the Related Art A conventional organic electroluminescence (hereinafter referred to as organic EL) light source is disclosed in
The configuration is as in -14468. The outline is
As shown in FIG. 3, an organic EL element (its laminated structure) 202 is provided on a substrate 201. Here, the substrate 201 has a heat radiation effect by using quartz or sapphire as a material having high thermal conductivity. Was raised.
【０００３】[0003]
【発明が解決しようとする課題】従来技術における有機
ＥＬ光源においては基板に熱伝導性に加えて透明性があ
る必要も考慮して、上述したように高価な材料である石
英やサファイヤを用いている。しかし、基板は通常、空
気と界面を接しており、その表面積により外部へ拡散で
きる熱量が制限されてしまい、照明光源などの目的でさ
らなる高輝度を狙った場合、発熱による問題に対しての
対策には限度があった。In the prior art organic EL light source, in consideration of the necessity of the substrate having transparency in addition to thermal conductivity, as described above, quartz and sapphire which are expensive materials are used. I have. However, the substrate is usually in contact with the air and the surface area limits the amount of heat that can be diffused to the outside. Had a limit.
【０００４】本発明はこの様な問題点を解決するもので
あり、安価で高い熱拡散性を有する基板を提供し、効率
が高く寿命の長い有機ＥＬ素子を備えた光源（有機ＥＬ
光源）を提供することを目的としている。The present invention has been made to solve the above problems, and provides a substrate which is inexpensive and has a high thermal diffusivity, and has a high efficiency and a long life.
Light source).
【０００５】[0005]
【課題を解決するための手段】本発明の第一の有機ＥＬ
光源は、透明性を有する基板上に有機エレクトロルミネ
ッセンス素子を形成した光源において、前記基板の有機
エレクトロルミネッセンス素子を形成した面とは異なる
もう一方の表面に凹凸形状を有し、該凹凸形状を含む前
記表面の表面積が、法線方向からの射影面積の１．５倍
以上であることを特徴とする。Means for Solving the Problems First organic EL of the present invention
The light source has an uneven shape on the other surface different from the surface on which the organic electroluminescent element is formed on the substrate in the light source in which the organic electroluminescent element is formed on a substrate having transparency, and includes the uneven shape. The surface area of the surface is at least 1.5 times the projected area from the normal direction.
【０００６】本構成によれば、基板表面からの放熱効果
を高めることができる。According to this structure, the effect of radiating heat from the substrate surface can be enhanced.
【０００７】本発明の第二の有機ＥＬ光源は、上記第一
の有機ＥＬ光源において、前記凹凸形状は前記基板面に
対して垂直方向の面および平行方向の面で構成されてい
ることを特徴とする。According to a second organic EL light source of the present invention, in the above-mentioned first organic EL light source, the uneven shape is constituted by a surface perpendicular to and parallel to the substrate surface. And
【０００８】本構成によれば、取り出し光の方向にあま
り影響を与えることなく、放熱効果を高めることができ
る。According to this configuration, the heat radiation effect can be enhanced without significantly affecting the direction of the extracted light.
【０００９】本発明の第三の有機ＥＬ光源は、上記第一
又は第二の有機ＥＬ光源において、前記凹凸形状は直線
方向に連続した凹部で構成されたことを特徴とする。A third organic EL light source according to the present invention is characterized in that, in the first or second organic EL light source, the concavo-convex shape is constituted by a concave portion continuous in a linear direction.
【００１０】本構成によれば、外気の流動に対して、凹
凸形状が抵抗になりにくく、高い放熱効果を得ることが
できる。According to this configuration, the uneven shape is unlikely to have resistance to the flow of the outside air, and a high heat radiation effect can be obtained.
【００１１】本発明の第四の有機ＥＬ光源は、上記第三
の有機ＥＬ光源において、前記凹部が天地方向に連続し
ていることを特徴とする。A fourth organic EL light source according to the present invention is characterized in that, in the third organic EL light source, the concave portion is continuous in the vertical direction.
【００１２】本構成によれば、発熱による空気の対流を
有効に使い、高い放熱効果を得ることができる。According to this configuration, it is possible to effectively use the convection of air due to heat generation and obtain a high heat radiation effect.
【００１３】[0013]
【発明の実施の形態】以下、本発明を実施形態に沿って
詳細に説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to embodiments.
【００１４】（第１の実施形態）以下に本発明の第１の
実施形態に係る有機ＥＬ素子光源を図１に基づいて説明
する。図１に示す有機ＥＬ光源おいて、基板１は透明性
がある物質で形成され、たとえばガラス、石英、サファ
イアなどが使用できるが、このなかでも熱伝導率が高い
石英、サファイアなどが有利である。基板１の一方の面
には有機ＥＬ素子（その積層構造）２を形成している。
有機ＥＬ素子２の積層構造部分は、基板１側から透明電
極膜２１、発光層２２および反射電極膜２３より構成さ
れている。発光層２２は図中では簡略化されて描かれて
いるが、実際には、正孔輸送層、有機ＥＬ発光膜、電子
輸送層など複数の層で形成されている。(First Embodiment) An organic EL element light source according to a first embodiment of the present invention will be described below with reference to FIG. In the organic EL light source shown in FIG. 1, the substrate 1 is formed of a transparent material, and for example, glass, quartz, sapphire, or the like can be used. Among them, quartz, sapphire, or the like having a high thermal conductivity is advantageous. . On one surface of the substrate 1, an organic EL element (its laminated structure) 2 is formed.
The laminated structure portion of the organic EL element 2 includes a transparent electrode film 21, a light emitting layer 22, and a reflective electrode film 23 from the substrate 1 side. Although the light emitting layer 22 is illustrated in a simplified manner in the drawing, it is actually formed of a plurality of layers such as a hole transport layer, an organic EL light emitting film, and an electron transport layer.
【００１５】発光層２２は、一般的には正孔輸送層、有
機ＥＬ発光膜、電子輸送層と機能分離させるのが望まし
いとされる。ただし、これに限定されるものではなく、
透明電極層と正孔輸送層の間に正孔注入層を導入するこ
とや、反射電極層と電子輸送層との間に電子注入層とし
て非常に薄い絶縁層を導入することもできる。また、正
孔輸送層や電子輸送層に蛍光色素を微量導入することが
でき、導入する蛍光色素により自在に発光色を選択する
ことができる。Generally, it is desirable that the light emitting layer 22 be functionally separated from the hole transport layer, the organic EL light emitting film, and the electron transport layer. However, it is not limited to this,
A hole injection layer can be introduced between the transparent electrode layer and the hole transport layer, or a very thin insulating layer can be introduced as an electron injection layer between the reflective electrode layer and the electron transport layer. Further, a trace amount of a fluorescent dye can be introduced into the hole transport layer or the electron transport layer, and the emission color can be freely selected depending on the fluorescent dye to be introduced.
【００１６】発光層２２に用いられる正孔輸送性材料に
は、例えばテトラアリールベンジシン化合物（トリアリ
ールジアミンないしトリフェニルジアミン：ＴＰＤ）等
が挙げられる。The hole transporting material used for the light emitting layer 22 includes, for example, a tetraarylbendicine compound (triaryldiamine or triphenyldiamine: TPD).
【００１７】電子輸送性の化合物としては、キノリン誘
導体、さらには８−キノリノールないしその誘導体を配
位子とする金属錯体、特にトリス（８−キノリノラト）
アルミニウム（Ａｌｑ3 ）を用いることが好ましい。As the electron transporting compound, a quinoline derivative, furthermore a metal complex having 8-quinolinol or a derivative thereof as a ligand, particularly tris (8-quinolinolato)
It is preferable to use aluminum (Alq3).
【００１８】また、有機ＥＬ発光膜は、低分子、高分子
を問わず、真空蒸着、スパッタリング、スピンコート、
ディッピング、インクジェット方式など様々な膜形成手
法を選択することができる。The organic EL light-emitting film can be formed by vacuum evaporation, sputtering, spin coating, low-molecular or high-molecular.
Various film forming methods such as dipping and an ink jet method can be selected.
【００１９】反射電極膜２３としては、導電性物質であ
ればよいが、中でも単体金属ではＡｌ、合金ではＭｇと
Ａｇの合金、Ａｌ合金が好ましい。The reflective electrode film 23 may be made of any conductive material, but Al is preferably used as a single metal, and an alloy of Mg and Ag or an Al alloy is preferably used as an alloy.
【００２０】基板１の有機ＥＬ素子２を形成していない
側には凹凸形状３が設けられている。凹凸形状３は約６
０度の頂角を持つプリズム形状となっているが、この場
合には表面積が２倍になる。凹凸形状３としては他に、
波状、柱状、錘状、球面状やまたは不定形などの形状を
とることができる。On the side of the substrate 1 where the organic EL element 2 is not formed, an uneven shape 3 is provided. Uneven shape 3 is about 6
Although it has a prism shape having a vertex angle of 0 degrees, in this case, the surface area is doubled. In addition to the uneven shape 3,
The shape may be a wave, a column, a weight, a spherical shape, or an irregular shape.
【００２１】基板１の表面積を通常より大きくすること
により、放熱性を高めることが可能であるが、基板１の
法線方向の正射影面積の１．５倍以上の表面積を持たせ
ることにより効果を上げることができる。また凹凸形状
３において凹部の幅は５００μｍ以上であることが望ま
しい。これは、基板１の表面から熱が凹部内の空気に伝
導して、温まった空気が容易に流動するために必要であ
る。さらに凹部は連続した構造にすることにより、空気
の流動性を高めることができる。By increasing the surface area of the substrate 1 more than usual, it is possible to enhance the heat dissipation. However, it is possible to increase the surface area by 1.5 times or more the normal projection area of the substrate 1 in the normal direction. Can be raised. It is desirable that the width of the concave portion in the uneven shape 3 is 500 μm or more. This is necessary because heat is conducted from the surface of the substrate 1 to the air in the concave portion, and the warmed air flows easily. Further, by forming the concave portion in a continuous structure, the fluidity of air can be increased.
【００２２】以上の構成によって放熱効果を高めること
により、高輝度で安定な発光を得ることができる。By increasing the heat radiation effect by the above configuration, it is possible to obtain high brightness and stable light emission.
【００２３】（第２の実施形態）以下に本発明の第２の
実施形態を図２に基づいて説明する。図２において、基
板１０１の一方の面には有機ＥＬ素子（その積層構造）
１０２が形成されている。基板１の有機ＥＬ素子２を形
成していない側には凹凸形状１０３を設けてあるが、こ
れは基板１の板面に対して垂直方向の面と平行方向の面
で構成されている。凹凸形状１０３が平面的に１対１の
割合で並んでいた場合、段差の高さが幅の１／２である
ときに基板１の法線方向からの射影面積と表面積の比が
１．５倍となる。凹凸形状１０３の凹部の幅は５００μ
ｍ以上あることが望ましいが、これは空気の流動性を確
保するのに必要である。(Second Embodiment) Hereinafter, a second embodiment of the present invention will be described with reference to FIG. In FIG. 2, an organic EL element (its laminated structure) is provided on one surface of a substrate 101.
102 are formed. The unevenness 103 is provided on the side of the substrate 1 where the organic EL element 2 is not formed. The unevenness 103 is composed of a surface perpendicular to the plate surface of the substrate 1 and a surface parallel to the plate surface. When the irregularities 103 are arranged in a one-to-one ratio on a plane, the ratio of the projected area to the surface area from the normal direction of the substrate 1 is 1.5 when the height of the step is か ら of the width. Double. The width of the concave portion of the uneven shape 103 is 500 μ
m or more is desirable, but this is necessary to ensure the fluidity of the air.
【００２４】また凹凸形状１０３の凹部は直線状の連続
性を持つことが望ましい。これにより、外部の気流が凹
部を有効に通り抜けることができ、放熱効果が高められ
る。さらにこの凹部を天地方向に配置することにより、
自然対流による気流に対して凹部が平行方向となって、
高い放熱効果が得られる。It is desirable that the concave portions of the concave-convex shape 103 have linear continuity. Thus, the external air flow can effectively pass through the concave portion, and the heat radiation effect is enhanced. Furthermore, by arranging this recess in the vertical direction,
The recess is parallel to the airflow due to natural convection,
High heat dissipation effect can be obtained.
【００２５】以上の構成により、放熱効果が高い有機Ｅ
Ｌ光源を実現することができる。With the above structure, the organic E having a high heat radiation effect
An L light source can be realized.
【００２６】[0026]
【発明の効果】本発明によると、以上説明したように、
大きい電流を流すことにより発生する熱を有効に伝導、
放熱することにより、高輝度で安定な有機ＥＬ光源を提
供することができる。According to the present invention, as described above,
Effectively conducts heat generated by passing a large current,
By dissipating heat, a high-luminance and stable organic EL light source can be provided.
【００２７】[0027]
【図１】 本発明の一実施形態に係る有機ＥＬ光源の構
造を示す斜視断面図。FIG. 1 is a perspective sectional view showing the structure of an organic EL light source according to one embodiment of the present invention.
【図２】 本発明の他の実施形態に係る有機ＥＬ光源の
構造を示す斜視断面図。FIG. 2 is a perspective sectional view showing a structure of an organic EL light source according to another embodiment of the present invention.
【図３】 従来の有機ＥＬ光源を示す断面図。FIG. 3 is a sectional view showing a conventional organic EL light source.
１、１０１、２０１ ‥‥ 導光板 ２、１０２、２０２ ‥‥ 有機ＥＬ素子 ３、１０３ ‥‥ 凹凸形状 1, 101, 201 {light guide plate 2, 102, 202} organic EL element 3, 103} uneven shape
Claims (4)
ルミネッセンス素子を形成した光源において、前記基板
の有機エレクトロルミネッセンス素子を形成した面とは
異なるもう一方の表面に凹凸形状を有し、該凹凸形状を
含む前記表面の表面積が、法線方向からの射影面積の
１．５倍以上であることを特徴とする有機エレクトロル
ミネッセンス光源。1. A light source in which an organic electroluminescence element is formed on a transparent substrate, wherein the other surface of the substrate, which is different from the surface on which the organic electroluminescence element is formed, has an uneven shape. Wherein the surface area of the surface is 1.5 times or more the projected area from the normal direction.
方向の面および平行方向の面で構成されていることを特
徴とする請求項１記載の有機エレクトロルミネッセンス
光源。2. The organic electroluminescent light source according to claim 1, wherein said uneven shape is constituted by a surface perpendicular to and parallel to said substrate surface.
で構成されたことを特徴とする請求項１または２記載の
有機エレクトロルミネッセンス光源。3. The organic electroluminescence light source according to claim 1, wherein the concave and convex shape is constituted by a concave portion that is continuous in a linear direction.
を特徴とする請求項３記載の有機エレクトロルミネッセ
ンス光源。4. The organic electroluminescent light source according to claim 3, wherein said concave portion is continuous in the vertical direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000044689A JP2001237062A (en) | 2000-02-22 | 2000-02-22 | Organic electroluminescent light source |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000044689A JP2001237062A (en) | 2000-02-22 | 2000-02-22 | Organic electroluminescent light source |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001237062A true JP2001237062A (en) | 2001-08-31 |
Family
ID=18567409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000044689A Withdrawn JP2001237062A (en) | 2000-02-22 | 2000-02-22 | Organic electroluminescent light source |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001237062A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006331694A (en) * | 2005-05-23 | 2006-12-07 | Matsushita Electric Works Ltd | Organic light emitting element and substrate for the same |
| KR100781594B1 (en) * | 2001-12-28 | 2007-12-03 | 엘지.필립스 엘시디 주식회사 | an active matrix organic electroluminescence display and a manufacturing method of the same |
| JP2011204692A (en) * | 2004-02-24 | 2011-10-13 | Global Oled Technology Llc | Oled display having thermally conductive backplate |
| CN106531902A (en) * | 2016-11-16 | 2017-03-22 | 广州宏庆电子有限公司 | Extremely-thin flexible heat-radiation film and method for manufacturing the same |
-
2000
- 2000-02-22 JP JP2000044689A patent/JP2001237062A/en not_active Withdrawn
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100781594B1 (en) * | 2001-12-28 | 2007-12-03 | 엘지.필립스 엘시디 주식회사 | an active matrix organic electroluminescence display and a manufacturing method of the same |
| JP2011204692A (en) * | 2004-02-24 | 2011-10-13 | Global Oled Technology Llc | Oled display having thermally conductive backplate |
| JP2006331694A (en) * | 2005-05-23 | 2006-12-07 | Matsushita Electric Works Ltd | Organic light emitting element and substrate for the same |
| CN106531902A (en) * | 2016-11-16 | 2017-03-22 | 广州宏庆电子有限公司 | Extremely-thin flexible heat-radiation film and method for manufacturing the same |
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