JP5501687B2 - Organic EL light source unit - Google Patents

Organic EL light source unit Download PDF

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JP5501687B2
JP5501687B2 JP2009174719A JP2009174719A JP5501687B2 JP 5501687 B2 JP5501687 B2 JP 5501687B2 JP 2009174719 A JP2009174719 A JP 2009174719A JP 2009174719 A JP2009174719 A JP 2009174719A JP 5501687 B2 JP5501687 B2 JP 5501687B2
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light emitting
organic
emitting layer
sealing substrate
case
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JP2011029041A (en
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理 棚橋
智 深野
将直 大川
秀治 河地
洋史 小西
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Panasonic Corp
Panasonic Holdings Corp
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Matsushita Electric Industrial Co Ltd
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    • 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
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/87—Passivation; Containers; Encapsulations
    • H10K59/871—Self-supporting sealing arrangements
    • H10K59/872—Containers
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/80—Constructional details
    • H10K59/8794—Arrangements for heating and cooling

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Arrangement Of Elements, Cooling, Sealing, Or The Like Of Lighting Devices (AREA)
  • Electroluminescent Light Sources (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)

Description

本発明は、有機エレクトロルミネッセンス（以下、ＥＬという）発光素子を備える有機ＥＬ光源ユニットに関する。   The present invention relates to an organic EL light source unit including an organic electroluminescence (hereinafter referred to as EL) light emitting element.

従来の有機ＥＬ発光素子（以下、発光素子という）は、発光層が発光中に熱を発するので、発光層に温度の斑ができて輝度斑が発生し易い。そこで、この問題を解消するために、発光素子と、発光層が発する熱を放熱させるための放熱シートと、を備える有機ＥＬ光源ユニット（以下、ユニットという）が知られている（例えば、特許文献１参照）。   In a conventional organic EL light emitting element (hereinafter referred to as a light emitting element), the light emitting layer emits heat during light emission, so that temperature spots are generated in the light emitting layer, and luminance spots are likely to occur. Therefore, in order to solve this problem, an organic EL light source unit (hereinafter referred to as a unit) including a light emitting element and a heat radiating sheet for radiating heat generated by the light emitting layer is known (for example, Patent Document). 1).

図６及び図７に、このようなユニット１００の構成を示す。ユニット１００は、発光素子１１と、発光素子１１に給電する給電部１２と、発光素子１１を保持する正面側及び背面側素子ケース１３ａ、１３ｂと、発光素子１１に取り付けられる放熱シート１４と、を備える。発光素子１１は、発光層１５が設けられる素子基板１６と、発光層１５等を封止する封止基板１７と、発光層１５に給電するためのプラス電極１８ａ及びマイナス電極１８ｂと、マイナス電極１８ｂに発光層１５を繋ぐアルミ電極３３と、を備える。   6 and 7 show the configuration of such a unit 100. FIG. The unit 100 includes a light emitting element 11, a power feeding unit 12 that supplies power to the light emitting element 11, front and rear side element cases 13 a and 13 b that hold the light emitting element 11, and a heat dissipation sheet 14 that is attached to the light emitting element 11. Prepare. The light emitting element 11 includes an element substrate 16 provided with a light emitting layer 15, a sealing substrate 17 that seals the light emitting layer 15 and the like, a plus electrode 18a and a minus electrode 18b for supplying power to the light emitting layer 15, and a minus electrode 18b. And an aluminum electrode 33 for connecting the light emitting layer 15.

素子ケース１３ａ、１３ｂが重なり合わさって給電部１２と素子基板１６を保持する。放熱シート１４は、封止基板１７と背面側素子ケース１３ｂに粘着接触して貼り付けられる。ユニット１００は、発光層１５が発する熱を放熱シート１４によって外部へ放出するので、輝度斑の発生を抑えることができる。しかし、ユニット１００を長期間使用すると、放熱シート１４が劣化するので、放熱シート１４を新しいものに交換しなければならないが、放熱シート１４を封止基板１７から剥がすときに、封止基板１７の端部が放熱シート１４と一緒に引っ張られて発光素子１１から剥離する虞がある。   The element cases 13 a and 13 b overlap to hold the power feeding unit 12 and the element substrate 16. The heat radiating sheet 14 is adhered and adhered to the sealing substrate 17 and the back side element case 13b. Since the unit 100 emits the heat generated by the light emitting layer 15 to the outside by the heat dissipation sheet 14, the occurrence of luminance spots can be suppressed. However, if the unit 100 is used for a long period of time, the heat radiating sheet 14 deteriorates. Therefore, the heat radiating sheet 14 must be replaced with a new one. When the heat radiating sheet 14 is peeled off from the sealing substrate 17, the sealing substrate 17 There is a possibility that the end portion is pulled together with the heat radiation sheet 14 and peeled off from the light emitting element 11.

特開２００６−２２８４５５号公報JP 2006-228455 A

本発明は、上記問題を解決するためになされたものであり、劣化した放熱シートを交換するとき、放熱シートと一緒に封止基板が発光素子から剥離することを防ぐことができる有機ＥＬ光源ユニットを提供することを目的とする。   The present invention has been made to solve the above problem, and an organic EL light source unit capable of preventing a sealing substrate from being peeled off from a light emitting element together with a heat dissipation sheet when a deteriorated heat dissipation sheet is replaced. The purpose is to provide.

上記目的を達成するために請求項１の発明は、光放出面を有する発光層が設けられる素子基板と、前記光放出面の反対側で前記素子基板に対向して配置される封止基板と、前記封止基板の外周に導出され前記素子基板に配置される素子電極と、を有する有機ＥＬ発光素子と、前記素子電極に給電する給電部と、前記有機ＥＬ発光素子と前記給電部を電気的に接続すると共に、機械的に固定する素子ケースと、前記発光層が発する熱を放熱させるために前記封止基板上に取り付けられる放熱シートと、を備えた有機ＥＬ光源ユニットであって、前記素子ケースは、前記封止基板と対向するケース壁に開口部を有すると共に、前記封止基板の少なくとも１辺の端部を保持する構造であり、前記放熱シートは、一方の面に粘着面を有し、その粘着力によって前記封止基板に貼り付けられ、平面視において前記発光層に相当する領域を覆うように、且つ前記素子ケースの開口部内に配置されるものである。
In order to achieve the above object, an invention according to claim 1 includes an element substrate provided with a light emitting layer having a light emitting surface, and a sealing substrate disposed opposite to the element substrate on the opposite side of the light emitting surface. An organic EL light-emitting element having an element electrode led to the outer periphery of the sealing substrate and disposed on the element substrate, a power feeding unit that feeds power to the element electrode, and the organic EL light-emitting element and the power feeding unit are electrically connected An organic EL light source unit comprising: an element case that is mechanically connected and mechanically fixed; and a heat radiating sheet that is attached on the sealing substrate to dissipate heat generated by the light emitting layer, The element case has a structure having an opening in a case wall facing the sealing substrate and holding an end of at least one side of the sealing substrate, and the heat dissipation sheet has an adhesive surface on one surface. Has its adhesive strength Thus the affixed to the sealing substrate so as to cover a region corresponding to the light emitting layer in plan view, it is those and disposed in the opening of the device case.

請求項２の発明は、請求項１に記載の有機ＥＬ光源ユニットにおいて、前記有機ＥＬ発光素子の発光層は、平面視において前記素子ケースの開口部内に配置されるように構成されているものである。   According to a second aspect of the present invention, in the organic EL light source unit according to the first aspect, the light emitting layer of the organic EL light emitting element is configured to be disposed in the opening of the element case in a plan view. is there.

請求項１の発明によれば、劣化した放熱シートを封止基板から剥がすときに、封止基板の端部にかかる力を素子ケースが抑え込むので、放熱シートと一緒に封止基板が有機ＥＬ発光素子から剥離することを防ぐことができる。   According to the first aspect of the invention, when the deteriorated heat dissipation sheet is peeled off from the sealing substrate, the element case suppresses the force applied to the end portion of the sealing substrate. Peeling from the element can be prevented.

請求項２の発明によれば、平面視において素子ケースの開口部内に配置される放熱シートが発熱部となる発光層全体を覆うことができるので、封止基板が有機ＥＬ発光素子から剥離することを防ぎつつ、発光層が発する熱をより放熱させることができる。   According to the second aspect of the present invention, since the heat radiation sheet disposed in the opening of the element case in a plan view can cover the entire light emitting layer serving as the heat generating part, the sealing substrate is peeled off from the organic EL light emitting element. It is possible to dissipate more heat generated by the light emitting layer while preventing the above.

本発明の一実施形態に係る有機ＥＬ光源ユニットを用いる照明器具の断面図。Sectional drawing of the lighting fixture using the organic electroluminescent light source unit which concerns on one Embodiment of this invention. 同照明器具の分解図。The exploded view of the lighting fixture. 同ユニットの分解図。Exploded view of the unit. 同ユニットの変形例の断面図。Sectional drawing of the modification of the unit. 同ユニットの分解図。Exploded view of the unit. 従来の有機ＥＬ光源ユニットの断面図。Sectional drawing of the conventional organic EL light source unit. 同ユニットの分解図。Exploded view of the unit.

図１及び図２は、本発明の一実施形態に係る有機ＥＬ光源ユニット１（以下、ユニットという）を用いて成る照明器具２の構成を示す。図３は、ユニット１の構成を示す。ユニット１は、本実施形態では光を照射する光源であり、照明器具２の一構成要素を成す。照明器具２は、ユニット１と、これを保持する正面側及び背面側筐体３ａ、３ｂと、ユニット１から照射される光を出射する前面パネル４と、ユニット１に電力を供給する給電線５と、を備える。正面側筐体３ａは枠体状に形成され、背面側筐体３ｂは下面開口の蓋体状に形成されている。これら筐体３ａ、３ｂは、重なり合わさってユニット１を保持する。正面側筐体３ａは、背面側筐体３ｂの側壁と接する周縁部６に、導体のリード線やコネクタ等である給電線５を通すための溝７を有し、また、下面開口には透光性を有する板状の前面パネル４が設置される。   FIG.1 and FIG.2 shows the structure of the lighting fixture 2 which uses the organic electroluminescent light source unit 1 (henceforth a unit) which concerns on one Embodiment of this invention. FIG. 3 shows the configuration of the unit 1. The unit 1 is a light source that irradiates light in the present embodiment, and constitutes one component of the lighting fixture 2. The luminaire 2 includes a unit 1, front and rear housings 3 a and 3 b that hold the unit 1, a front panel 4 that emits light emitted from the unit 1, and a power supply line 5 that supplies power to the unit 1. And comprising. The front-side housing 3a is formed in a frame shape, and the back-side housing 3b is formed in a lid shape with a lower surface opening. The casings 3a and 3b are overlapped to hold the unit 1. The front side housing 3a has a groove 7 for passing a power supply line 5 such as a conductor lead wire or a connector in a peripheral edge portion 6 in contact with the side wall of the back side housing 3b. A plate-like front panel 4 having light properties is installed.

ユニット１は、有機ＥＬ発光素子１１（以下、発光素子という）と、発光素子１１に給電する給電部１２と、発光素子１１と給電部１２を保持する正面側及び背面側素子ケース１３ａ、１３ｂと、発光素子１１に取り付けられる放熱シート１４と、を備える。   The unit 1 includes an organic EL light emitting element 11 (hereinafter referred to as a light emitting element), a power feeding unit 12 that feeds power to the light emitting element 11, and front and rear side element cases 13a and 13b that hold the light emitting element 11 and the power feeding unit 12. And a heat dissipation sheet 14 attached to the light emitting element 11.

発光素子１１は、有機ＥＬの発光層１５が設けられる透明な矩形の素子基板１６と、発光層１５等を封止する封止基板１７と、発光層１５に給電するための素子電極であるプラス電極１８ａ及びマイナス電極１８ｂと、を備え、発光パネルとして構成される。発光素子１１は、給電線５が取り付けられた一対の給電部１２が、プラス電極１８ａ及びマイナス電極１８ｂにそれぞれ接触することで、発光層１５に給電される。   The light emitting element 11 is a transparent rectangular element substrate 16 provided with a light emitting layer 15 of organic EL, a sealing substrate 17 for sealing the light emitting layer 15 and the like, and an element electrode for supplying power to the light emitting layer 15. An electrode 18a and a negative electrode 18b are provided and configured as a light emitting panel. The light emitting element 11 is supplied with power to the light emitting layer 15 by the pair of power supply portions 12 to which the power supply line 5 is attached contacting the plus electrode 18a and the minus electrode 18b.

正面側素子ケース１３ａはケース壁２１及びケース側壁２２から成り、背面側素子ケース１３ｂはケース壁２３及びケース側壁２４から成る。素子ケース１３ａ、１３ｂは、アクリル等の樹脂から形成され、ケース側壁２２とケース側壁２４が接するようにして重なり合わさることで、直方体の箱状となり、発光素子１１と給電部１２を電気的に接続すると共に、機械的に固定する。   The front side element case 13 a is composed of a case wall 21 and a case side wall 22, and the back side element case 13 b is composed of a case wall 23 and a case side wall 24. The element cases 13a and 13b are formed of a resin such as acrylic, and are overlapped so that the case side wall 22 and the case side wall 24 are in contact with each other, thereby forming a rectangular parallelepiped box shape, and electrically connecting the light emitting element 11 and the power feeding unit 12 to each other. And mechanically fix.

正面側素子ケース１３ａは、素子基板１６と対向するケース壁２１に光を出射するための開口である照射部２５と、ケース側壁２２に給電部１２を保持するための溝部２６と、を有する。背面側素子ケース１３ｂは、封止基板１７と対向するケース壁２３に、放熱シート１４を取り付けるための開口部２７を有すると共に、封止基板１７の４辺の端部を保持する構造である。なお、背面側素子ケース１３ｂは、封止基板１７の少なくとも１辺の端部を保持する構造であればよい。   The front element case 13 a includes an irradiation part 25 that is an opening for emitting light to the case wall 21 that faces the element substrate 16, and a groove part 26 for holding the power feeding part 12 on the case side wall 22. The back-side element case 13 b has a structure in which an opening 27 for attaching the heat dissipation sheet 14 is provided in the case wall 23 facing the sealing substrate 17 and the end portions of the four sides of the sealing substrate 17 are held. In addition, the back side element case 13b should just be a structure holding the edge part of at least 1 side of the sealing substrate 17. FIG.

放熱シート１４は、発光層１５が発する熱を放熱させる。また、一方の面が粘着面となっており、その粘着力によって封止基板１７上に貼り付けられるか、又は接着剤によって封止基板１７上に貼り付けられ、平面視において背面側素子ケース１３ｂの開口部２７内に配置される。放熱シート１４は、ユニット１が筐体３ａ、３ｂに保持されているとき、背面側筐体３ｂに密着して発光層１５から吸収した熱を筐体３ａ、３ｂに放熱し、かつ、発光層１５の面内の温度分布を均一にするので、ユニット１の輝度斑の発生を抑えることができる。   The heat dissipation sheet 14 dissipates heat generated by the light emitting layer 15. Further, one surface is an adhesive surface, and is adhered on the sealing substrate 17 by the adhesive force, or is adhered on the sealing substrate 17 by an adhesive, and the back side element case 13b in a plan view. It arrange | positions in the opening part 27 of this. When the unit 1 is held by the housings 3a and 3b, the heat radiating sheet 14 dissipates the heat absorbed by the light emitting layer 15 in close contact with the back side housing 3b to the housings 3a and 3b. Since the temperature distribution in the 15 planes is made uniform, the occurrence of luminance spots in the unit 1 can be suppressed.

ユニット１は、劣化した放熱シート１４を封止基板１７から剥がすときに、封止基板１７の端部にかかる力を背面側素子ケース１３ｂが抑え込むので、放熱シート１４と一緒に封止基板１７が発光素子１１から剥離することを防ぐことができる。   When the unit 1 peels off the deteriorated heat dissipation sheet 14 from the sealing substrate 17, the force applied to the end of the sealing substrate 17 is suppressed by the back side element case 13 b, so that the sealing substrate 17 is attached together with the heat dissipation sheet 14. Separation from the light emitting element 11 can be prevented.

素子基板１６は、発光層１５から照射される光を導出し、ガラスや透明樹脂などの透明部材から成り、その上に発光層１５への給電用の電極となるプラス電極１８ａ及びマイナス電極１８ｂが形成され、このプラス電極１８ａ及びマイナス電極１８ｂ上に発光層１５が積層される。素子基板１６の発光層１５が形成された反対面側（裏面側）は、ＥＬ発光の光放出面となっている。   The element substrate 16 derives light emitted from the light emitting layer 15 and is made of a transparent member such as glass or transparent resin. On the element substrate 16, a plus electrode 18 a and a minus electrode 18 b serving as electrodes for feeding power to the light emitting layer 15 are provided. The light emitting layer 15 is formed on the plus electrode 18a and the minus electrode 18b. The opposite surface side (back surface side) on which the light emitting layer 15 of the element substrate 16 is formed is a light emission surface for EL light emission.

プラス電極１８ａ及びマイナス電極１８ｂは、例えば、ＩＴＯ（酸化インジウム錫）により透明電極として素子基板１６上に平面状に形成され、それらの間の矩形の絶縁分離層により分離された２つの矩形パターンからなり、プラス電極１８ａの面積がマイナス電極１８ｂの面積よりも大きい。   The plus electrode 18a and the minus electrode 18b are formed on the element substrate 16 as a transparent electrode by ITO (indium tin oxide), for example, in a planar shape, and are separated from two rectangular patterns separated by a rectangular insulating separation layer therebetween. Thus, the area of the plus electrode 18a is larger than the area of the minus electrode 18b.

プラス電極１８ａ上には、発光体として、例えば、蛍光性有機化合物を含む有機薄膜から成る発光層１５が形成される。また、発光層１５の上面には、蒸着によりサブミクロン厚のアルミ電極３３が形成され、このアルミ電極３３はマイナス電極１８ｂに接続される。また、発光層１５及びアルミ電極３３は、シリコン樹脂から成る封止基板１７により封止される。プラス電極１８ａとマイナス電極１８ｂは、封止基板１７の外周に導出されており、素子基板１６の一対の対向する辺方向に沿う導出部分で給電部１２と直接的に接触するか、又は導電性薄膜を介して間接的に接触する。   On the plus electrode 18a, for example, a light emitting layer 15 made of an organic thin film containing a fluorescent organic compound is formed as a light emitter. A submicron-thick aluminum electrode 33 is formed on the top surface of the light emitting layer 15 by vapor deposition, and the aluminum electrode 33 is connected to the negative electrode 18b. The light emitting layer 15 and the aluminum electrode 33 are sealed with a sealing substrate 17 made of silicon resin. The plus electrode 18 a and the minus electrode 18 b are led out to the outer periphery of the sealing substrate 17, and are in direct contact with the power feeding unit 12 at the lead-out portions along the pair of opposing side directions of the element substrate 16 or conductive. Contact indirectly through a thin film.

なお、発光素子１１は、発光層１５とプラス電極１８ａの間に発光層１５へのホール注入性を向上させるための正孔輸送層や、発光層１５とアルミ電極３３の間に発光層１５への電子注入性を向上させるための電子輸送層を有していてもよい。また、マイナス電極１８ｂは、必ずしも透明電極でなくてもよく、例えば、アルミから成る電極であってもよい。   Note that the light emitting element 11 has a hole transport layer for improving the hole injection property to the light emitting layer 15 between the light emitting layer 15 and the plus electrode 18 a, and the light emitting layer 15 between the light emitting layer 15 and the aluminum electrode 33. It may have an electron transport layer for improving the electron injection property. Further, the minus electrode 18b is not necessarily a transparent electrode, and may be an electrode made of aluminum, for example.

給電部１２は、銅やステンレススチールのような金属導電体から成り、例えば、板状の金属導電体を打ち抜き加工して矩形に形成される。また、給電部１２は、プラス電極１８ａとマイナス電極１８ｂの材料であるＩＴＯと比較して極めて低い抵抗値となるので、プラス電極１８ａとマイナス電極１８ｂの抵抗による影響が最小限となる。すなわち、プラス電極１８ａ及びマイナス電極１８ｂに印加される電圧の降下現象が最小限となり、ユニット１の輝度斑を低減させることができる。なお、給電部１２は、板状の金属導電体を矩形に形成したもの以外に、例えば、線状の金属導電体をコイル状に形成したものであってもよい。   The power feeding unit 12 is made of a metal conductor such as copper or stainless steel, and is formed into a rectangle by punching a plate-like metal conductor, for example. In addition, since the power feeding unit 12 has an extremely low resistance value as compared with ITO which is a material of the plus electrode 18a and the minus electrode 18b, the influence of the resistance of the plus electrode 18a and the minus electrode 18b is minimized. That is, the voltage drop phenomenon applied to the plus electrode 18a and the minus electrode 18b is minimized, and the luminance unevenness of the unit 1 can be reduced. The power feeding unit 12 may be, for example, a linear metal conductor formed in a coil shape other than a rectangular plate-shaped metal conductor.

図４及び図５は、本実施形態の変形例に係るユニット１を示す。ユニット１は、発光層１５が、平面視において背面側素子ケース１３ｂの開口部２７内に配置されるように構成されており、その他の構成については上記と同様である。ユニット１は、平面視において背面側素子ケース１３ｂの開口部２７内に配置される放熱シート１４が発熱部となる発光層１５全体を覆うことができるので、封止基板１７が発光素子１１から剥離することを防ぎつつ、発光層１５が発する熱をより放熱させることができる。   4 and 5 show a unit 1 according to a modification of the present embodiment. The unit 1 is configured such that the light emitting layer 15 is disposed in the opening 27 of the back side element case 13b in plan view, and the other configurations are the same as described above. In the unit 1, since the heat radiation sheet 14 disposed in the opening 27 of the back side element case 13 b in the plan view can cover the entire light emitting layer 15 serving as a heat generating part, the sealing substrate 17 is peeled off from the light emitting element 11. It is possible to dissipate more heat generated by the light emitting layer 15 while preventing this.

なお、本発明は、上記の実施形態の構成に限られず、発明の要旨を変更しない範囲で種々の変形が可能である。例えば、上記実施形態では、ユニットは、矩形のものを示したが、円形のものであっても構わない。その場合、素子ケースの開口部も、ユニットの形状に合わせて円形のものであっても構わない。   In addition, this invention is not restricted to the structure of said embodiment, A various deformation | transformation is possible in the range which does not change the summary of invention. For example, in the above-described embodiment, the unit is rectangular, but it may be circular. In that case, the opening of the element case may be circular according to the shape of the unit.

１ ユニット（有機ＥＬ光源ユニット）
１１ 発光素子（有機ＥＬ発光素子）
１２ 給電部
１３ａ 正面側素子ケース（素子ケース）
１３ｂ 背面側素子ケース（素子ケース）
１４ 放熱シート
１５ 発光層
１６ 素子基板
１７ 封止基板
１８ａ プラス電極（素子電極）
１８ｂ マイナス電極（素子電極）
２３ ケース壁
２７ 開口部 1 unit (organic EL light source unit)
11 Light Emitting Element (Organic EL Light Emitting Element)
12 Feeder 13a Front side element case (element case)
13b Rear side element case (element case)
14 heat dissipation sheet 15 light emitting layer 16 element substrate 17 sealing substrate 18a plus electrode (element electrode)
18b Negative electrode (element electrode)
23 Case wall 27 Opening

Claims (2)

光放出面を有する発光層が設けられる素子基板と、前記光放出面の反対側で前記素子基板に対向して配置される封止基板と、前記封止基板の外周に導出され前記素子基板に配置される素子電極と、を有する有機ＥＬ発光素子と、
前記素子電極に給電する給電部と、
前記有機ＥＬ発光素子と前記給電部を電気的に接続すると共に、機械的に固定する素子ケースと、
前記発光層が発する熱を放熱させるために前記封止基板上に取り付けられる放熱シートと、を備えた有機ＥＬ光源ユニットであって、
前記素子ケースは、前記封止基板と対向するケース壁に開口部を有すると共に、前記封止基板の少なくとも１辺の端部を保持する構造であり、
前記放熱シートは、一方の面に粘着面を有し、その粘着力によって前記封止基板に貼り付けられ、平面視において前記発光層に相当する領域を覆うように、且つ前記素子ケースの開口部内に配置されることを特徴とする有機ＥＬ光源ユニット。 An element substrate provided with a light emitting layer having a light emission surface, a sealing substrate disposed opposite to the element substrate on the opposite side of the light emission surface, and an outer periphery of the sealing substrate led to the element substrate An organic EL light emitting device having a device electrode disposed;
A power feeding section for feeding power to the element electrode;
An element case for electrically connecting the organic EL light emitting element and the power feeding unit and mechanically fixing the element,
An organic EL light source unit comprising: a heat-dissipating sheet attached on the sealing substrate to dissipate heat generated by the light-emitting layer,
The element case has a structure having an opening in a case wall facing the sealing substrate and holding an end of at least one side of the sealing substrate.
The heat-dissipating sheet has an adhesive surface on one surface, is attached to the sealing substrate by the adhesive force , covers an area corresponding to the light emitting layer in a plan view , and within the opening of the element case An organic EL light source unit, which is disposed in 前記有機ＥＬ発光素子の発光層は、平面視において前記素子ケースの開口部内に配置されるように構成されていることを特徴とする請求項１に記載の有機ＥＬ光源ユニット。   The organic EL light source unit according to claim 1, wherein the light emitting layer of the organic EL light emitting element is configured to be disposed in an opening of the element case in a plan view.
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