WO2012172880A1 - Organic el illumination device - Google Patents

Organic el illumination device Download PDF

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Publication number
WO2012172880A1
WO2012172880A1 PCT/JP2012/061544 JP2012061544W WO2012172880A1 WO 2012172880 A1 WO2012172880 A1 WO 2012172880A1 JP 2012061544 W JP2012061544 W JP 2012061544W WO 2012172880 A1 WO2012172880 A1 WO 2012172880A1
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Prior art keywords
organic
panel
light emitting
emitting unit
panels
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PCT/JP2012/061544
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French (fr)
Japanese (ja)
Inventor
泰啓 本多
伸哉 三木
正利 米山
将積　直樹
淳弥 若原
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コニカミノルタホールディングス株式会社
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Application filed by コニカミノルタホールディングス株式会社 filed Critical コニカミノルタホールディングス株式会社
Priority to JP2013520464A priority Critical patent/JP5821955B2/en
Publication of WO2012172880A1 publication Critical patent/WO2012172880A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21K—NON-ELECTRIC LIGHT SOURCES USING LUMINESCENCE; LIGHT SOURCES USING ELECTROCHEMILUMINESCENCE; LIGHT SOURCES USING CHARGES OF COMBUSTIBLE MATERIAL; LIGHT SOURCES USING SEMICONDUCTOR DEVICES AS LIGHT-GENERATING ELEMENTS; LIGHT SOURCES NOT OTHERWISE PROVIDED FOR
    • F21K99/00—Subject matter not provided for in other groups of this subclass
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2105/00—Planar light sources
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F21—LIGHTING
    • F21Y—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES F21K, F21L, F21S and F21V, RELATING TO THE FORM OR THE KIND OF THE LIGHT SOURCES OR OF THE COLOUR OF THE LIGHT EMITTED
    • F21Y2115/00—Light-generating elements of semiconductor light sources
    • F21Y2115/10—Light-emitting diodes [LED]
    • F21Y2115/15—Organic light-emitting diodes [OLED]

Definitions

  • the present invention relates to an organic EL lighting device, and more particularly, to an organic EL lighting device including a plurality of organic EL panels arranged in a planar shape.
  • Patent Document 1 a lighting apparatus including a plurality of organic EL (Organic Electro Luminescence) panels as light emitting elements is known.
  • a planar light-emitting portion is formed by arranging a plurality of organic EL panels in a planar shape (including a planar shape and a curved shape).
  • the planar light emitting unit constitutes a so-called surface light source that emits light from the entire surface.
  • surface light sources can produce soft illumination with reduced brightness, making them high-quality applications. Suitable for Moreover, since the lighting fixture provided with such a surface light source can comprise the light emission part thinly, it can also attain space saving.
  • An object of the present invention is to provide an organic EL lighting apparatus including a plurality of organic EL panels arranged in a planar shape, and capable of extending the life of each organic EL panel.
  • the organic EL lighting fixture based on this invention is equipped with the light emission part by which the some organic EL panel was arranged in planar shape, and the degree of the density
  • the interval between the plurality of organic EL panels arranged on the center side in the light emitting unit is wider than the interval between the plurality of organic EL panels arranged on the outer peripheral side in the light emitting unit.
  • the light emitting unit includes an organic EL panel disposition area where the organic EL panel is provided, and an organic EL panel disposition area where the organic EL panel is not disposed, and the organic EL panel disposition area
  • the organic EL panel non-arrangement regions are arranged at the same interval, and are arranged side by side along the matrix direction as a whole.
  • the organic EL panel disposition region and the organic EL panel non-disposition region are arranged in a staggered manner on the center side in the light emitting unit.
  • an organic EL lighting fixture provided with the some organic EL panel arranged in planar shape, Comprising: Obtaining the organic EL lighting fixture which can aim at the lifetime improvement of each organic EL panel can be obtained. It becomes possible.
  • FIG. 2 is a cross-sectional view taken along the line II-II in FIG. It is a top view which shows the temperature distribution in the light emission part at the time of making the organic EL lighting fixture in the comparative example regarding this invention light continuously for a predetermined time. It is a figure which shows the correlation of the temperature of an organic EL panel at the time of operation
  • 1 is a first plan view showing an organic EL lighting fixture in Embodiment 1.
  • FIG. FIG. 3 is a second plan view showing the organic EL lighting device in the first embodiment.
  • FIG. 10 is a plan view showing an organic EL lighting device in a modification of the second embodiment.
  • FIG. 1 is a plan view showing an organic EL lighting apparatus 100 in this comparative example.
  • 2 is a cross-sectional view taken along the line II-II in FIG.
  • an organic EL lighting apparatus 100 includes a light emitting unit 10 configured by arranging a plurality of organic EL panels 1 in a plane and a plurality of organic EL panels 1 on a ceiling (see FIG. 1).
  • a housing 20 for fixing to a wall surface (not shown) or the like, and a drive circuit (not shown) for supplying a current to each of the plurality of organic EL panels 1.
  • a plurality of organic EL panels 1 having substantially the same area are arranged in a so-called matrix of 5 ⁇ 5.
  • a space D1 is provided between adjacent organic EL panels 1 in both the row direction (left and right direction in FIG. 1) and the column direction (up and down direction in FIG. 1).
  • the plurality of organic EL panels 1 are attached to the housing 20. When the plurality of organic EL panels 1 emit light, heat generated in the plurality of organic EL panels 1 is transmitted to the housing 20.
  • the housing 20 functions as a heat radiator for the plurality of organic EL panels 1.
  • the organic EL panel 1 disposed on the outer peripheral side in the light emitting unit 10 has a limited number of organic EL panels disposed on the periphery thereof, and thus is not easily heated due to the heat dissipation action of the housing 20.
  • the periphery of the organic EL panel 1 arranged on the center side in the light emitting unit 10 is surrounded by other organic EL panels 1.
  • the heat dissipation action by the housing 20 on the organic EL panel 1 is such that the organic EL panel 1 arranged on the center side in the light emitting unit 10 is compared with the organic EL panel 1 arranged on the outer peripheral side in the light emitting unit 10. Low.
  • the heat dissipation efficiency in the organic EL panel 1 disposed on the center side in the light emitting unit 10 is further reduced.
  • FIG. 3 is a plan view showing a temperature distribution in the light emitting unit 10 when the organic EL lighting apparatus 100 is continuously turned on for a predetermined time.
  • a difference in heat dissipation efficiency occurs between the plurality of organic EL panels 1. Due to this difference in heat dissipation efficiency, the vicinity of the boundary line Rc between the organic EL panel 1 (1c) located on the most central side in the light emitting unit 10 and the organic EL panel 1 (1b) located on the outer periphery thereof In the case, a temperature rise of, for example, + 15 ° C. occurs with respect to the ambient environmental temperature.
  • a temperature increase of, for example, + 10 ° C. occurs with respect to the ambient environmental temperature.
  • a temperature increase of, for example, + 5 ° C. occurs with respect to the ambient environmental temperature.
  • the heat dissipation efficiency near the organic EL panel 1 (1b) is lower than the heat dissipation efficiency of the organic EL panel 1 (1a), and the heat dissipation efficiency near the organic EL panel 1 (1c) is lower than the organic EL panel 1 (1b).
  • the temperature on the center side of the light emitting unit 10 becomes higher than the temperature on the outer peripheral side of the light emitting unit 10.
  • An organic EL panel is composed of an organic material, and this organic material deteriorates due to various factors. In general, the following correlation exists between the temperature of the organic EL panel during the operation of the organic EL panel and the useful life (time) of the organic EL panel.
  • FIG. 4 is a diagram showing a correlation L10 between the temperature of the organic EL panel during the operation of the organic EL panel and the useful life (time) of the organic EL panel.
  • the lifetime (time) of the organic EL panel in FIG. 4 is reduced to a predetermined luminance (for example, 70% or 50%) as compared with the initial state when a constant current is applied to the organic EL panel. Means the time until.
  • the organic EL panel 1 (1 b) located on the inner side of the organic EL panel 1 (1 a) located on the outermost peripheral side has A temperature increase of + 5 ° C. occurs.
  • the lifetime of the organic EL panel 1 (1b) positioned on the inner side of the organic EL panel 1 (1a) positioned on the outermost peripheral side is 0.8 times as long as the lifetime.
  • the organic EL panel 1 (1c) located on the two inner sides has a temperature increase of + 10 ° C. Arise.
  • the lifetime of the organic EL panel arranged on the center side is shortened.
  • the organic EL lighting apparatus 100 may be configured such that each organic EL panel 1 cannot be easily removed from the housing 20. In this case, although the organic EL panels 1 (1a) and 1 (1b) have not reached the end of their useful life, the overall useful life of the organic EL lighting apparatus 100 is rate-determined by the organic EL panel 1 (1c). As a result, the useful life of the organic EL lighting apparatus 100 is shortened. Even when the organic EL lighting apparatus 100 is configured such that each organic EL panel 1 can be removed from the housing 20, it is necessary to frequently replace only the organic EL panel 1 (1c).
  • FIG. 5 is a first plan view showing the organic EL lighting fixture 101.
  • FIG. 6 is a second plan view showing the organic EL lighting fixture 101.
  • the organic EL lighting apparatus 101 includes a light emitting unit 10 configured by arranging a plurality of organic EL panels 1 in a planar shape, and a plurality of organic EL panels 1 on a ceiling (not shown). Or the housing
  • organic EL panels 1 having substantially the same area are used. Specifically, 16 organic EL panels 1 (1 a) are arranged in a ring shape on the outer peripheral side in the light emitting unit 10. A space D1 is provided between the adjacent organic EL panels 1 (1a) in both the horizontal direction (left and right direction in FIG. 5) and the vertical direction (up and down direction in FIG. 5).
  • the four organic EL panels 1 (1b) are annularly arranged inside the organic EL panel 1 (1a) in the light emitting unit 10.
  • the four organic EL panels 1 (1 a) are located on the center side in the light emitting unit 10.
  • a space D2 is provided between the adjacent organic EL panels 1 (1b) both in the horizontal direction (left and right direction in FIG. 5) and in the vertical direction (up and down direction in FIG. 5). Further, a distance D2 is also provided between the organic EL panel 1 (1b) and the organic EL panel 1 (1a) closest to the organic EL panel 1 (1b).
  • the interval D2 is wider than the interval D1.
  • the plurality of organic EL panels 1 are attached to the housing 20. When the plurality of organic EL panels 1 emit light, heat generated in the plurality of organic EL panels 1 is transmitted to the housing 20.
  • the housing 20 functions as a heat radiator for the plurality of organic EL panels 1.
  • each of the plurality of organic EL panels 1 is arranged as described above, whereby the degree of congestion of the plurality of organic EL panels 1 in light emitting unit 10 ( The density is smaller on the central side in the light emitting unit 10 than on the outer peripheral side in the light emitting unit 10.
  • the light emitting unit 10 is divided into an outer peripheral side light emitting unit 10a and a central side light emitting unit 10b.
  • the area of one organic EL panel 1 is assumed to be (W1 ⁇ W1). If the area of the central light emitting unit 10b is (Wb ⁇ Wb), the area of the outer peripheral light emitting unit 10a is (Wa ⁇ Wa ⁇ Wb ⁇ Wb).
  • the density in the outer peripheral side light emitting unit 10a is expressed by (W1 ⁇ W1) ⁇ 16 sheets / [(Wa ⁇ Wa ⁇ Wb ⁇ Wb)].
  • the density of the central light emitting unit 10b is represented by (W1 ⁇ W1) ⁇ 4 / (Wb ⁇ Wb).
  • Each of the above dimensions is designed so that (the density in the outer peripheral side light emitting part 10a)> (the density in the central side light emitting part 10b) is established.
  • FIG. 7 is a plan view showing a temperature distribution in the light emitting unit 10 when the organic EL lighting fixture 101 is continuously turned on for a predetermined time. As shown in FIG.
  • the heat dissipation efficiency around each organic EL panel 1 (1 b) is improved on the center side in the light emitting unit 10. Since a local temperature rise on the center side in the light emitting unit 10 is suppressed, a substantially uniform temperature distribution is formed as a whole in the region Rd.
  • the lifetime of the organic EL lighting fixture 101 as a whole is not limited by the expiration of the lifetime of some of the organic EL panels 1, and it is not necessary to frequently replace only some of the organic EL panels 1. .
  • FIG. 8 is a plan view showing the organic EL lighting fixture 102.
  • the organic EL lighting fixture 102 includes a light emitting unit 10 configured by arranging a plurality of organic EL panels 1 in a planar shape, and a plurality of organic EL panels 1 on a ceiling (not shown). Or the housing
  • the light emitting unit 10 in the present embodiment includes an organic EL panel placement area A1 where the organic EL panel 1 is provided, and an organic EL panel non-placement area A2 where the organic EL panel 1 is not provided.
  • Each organic EL panel disposition area A1 and each organic EL panel non-disposition area A2 are arranged with a distance D1 between them and arranged side by side along the matrix direction as a whole (in a so-called matrix form).
  • region A2 are arranged in zigzag form.
  • each of the plurality of organic EL panels 1 is arranged as described above, so that the degree of density (density) of the plurality of organic EL panels 1 in the light emitting unit 10 is increased. Compared to the outer peripheral side in 10, the center side in the light emitting unit 10 is smaller.
  • FIG. 8 is a plan view showing a temperature distribution in the light emitting unit 10 when the organic EL lighting apparatus 102 is continuously turned on for a predetermined time.
  • the heat dissipation efficiency around each organic EL panel 1 (1 b) is improved on the center side in the light emitting unit 10. Since a local temperature rise on the center side in the light emitting unit 10 is suppressed, a substantially uniform temperature distribution is formed as a whole in the region Rd.
  • each organic EL panel placement area A1 and each organic EL panel non-placement area A2 are arranged with a distance D1 from each other, and as a whole along the matrix direction. Arranged side by side. According to this configuration, it is possible to improve design and production efficiency, and manufacturing costs can be reduced.
  • the organic EL panel non-arrangement region A2 may be provided only at the center of the light emitting unit 10. In this case, it is also possible to improve the light emission luminance as the lighting device.
  • 1, 1a, 1b, 1c Organic EL panel 10 light emitting part, 10a outer peripheral side light emitting part, 10b central side light emitting part, 20 housing, 100, 101, 102, 102a lighting fixture, A1 organic EL panel installation area, A2 Organic EL panel non-arrangement area.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Electroluminescent Light Sources (AREA)
  • Non-Portable Lighting Devices Or Systems Thereof (AREA)
  • Planar Illumination Modules (AREA)

Abstract

This organic EL illumination device (101) is provided with a light-emitting unit (10) comprising multiple planarly arranged organic EL panels (1), wherein the density of the organic EL panels (1) in the light-emitting unit (10) is lower in the center of the light-emitting unit (10) than on the outer circumference of the light-emitting unit (10). This organic EL illumination device (101) can extend the life of the organic EL panels (1).

Description

有機ＥＬ照明器具Organic EL lighting equipment
　本発明は、有機ＥＬ照明器具に関し、特に、面状に配列された複数の有機ＥＬパネルを備える有機ＥＬ照明器具に関する。 The present invention relates to an organic EL lighting device, and more particularly, to an organic EL lighting device including a plurality of organic EL panels arranged in a planar shape.
　特開２００９－１６４０２２号公報（特許文献１）に開示されるように、発光素子として複数の有機ＥＬ（Organic　Electro　Luminescence）パネルを備えた照明器具が知られている。このような照明器具においては、複数の有機ＥＬパネルが面状（平面状および曲面状を含む）に配列されることによって、面状の発光部が形成される。 As disclosed in Japanese Patent Application Laid-Open No. 2009-164022 (Patent Document 1), a lighting apparatus including a plurality of organic EL (Organic Electro Luminescence) panels as light emitting elements is known. In such a lighting fixture, a planar light-emitting portion is formed by arranging a plurality of organic EL panels in a planar shape (including a planar shape and a curved shape).
　面状の発光部は、面全体が発光するいわゆる面光源を構成する。面光源は、白熱灯およびＬＥＤ（Light　Emitting　Diode）のような点光源、ならびに蛍光灯のような線光源とは異なり、輝度を抑えた柔らかな照光を演出することができるため、高品位な用途に適している。また、このような面光源を備えた照明器具は、発光部の厚さを薄く構成することができるため、省スペース化を図ることも可能となっている。 The planar light emitting unit constitutes a so-called surface light source that emits light from the entire surface. Unlike point light sources such as incandescent lamps and LEDs (Light Emitting Diodes), and linear light sources such as fluorescent lamps, surface light sources can produce soft illumination with reduced brightness, making them high-quality applications. Suitable for Moreover, since the lighting fixture provided with such a surface light source can comprise the light emission part thinly, it can also attain space saving.
特開２００９－１６４０２２号公報JP 2009-164022 A
　本発明は、面状に配列された複数の有機ＥＬパネルを備える有機ＥＬ照明器具であって、各々の有機ＥＬパネルにおける長寿命化を図ることが可能な有機ＥＬ照明器具を提供することを目的とする。 An object of the present invention is to provide an organic EL lighting apparatus including a plurality of organic EL panels arranged in a planar shape, and capable of extending the life of each organic EL panel. And
　本発明に基づく有機ＥＬ照明器具は、複数の有機ＥＬパネルが面状に配列された発光部を備え、上記発光部内における複数の上記有機ＥＬパネルの密集の度合いは、上記発光部内の外周側に比べて上記発光部内の中央側の方が小さい。 The organic EL lighting fixture based on this invention is equipped with the light emission part by which the some organic EL panel was arranged in planar shape, and the degree of the density | concentration of the said several organic EL panel in the said light emission part is on the outer peripheral side in the said light emission part. In comparison, the center side in the light emitting part is smaller.
　好ましくは、上記発光部内の中央側に配置される複数の上記有機ＥＬパネル同士の間隔は、上記発光部内の外周側に配置される複数の上記有機ＥＬパネル同士の間隔よりも広い。 Preferably, the interval between the plurality of organic EL panels arranged on the center side in the light emitting unit is wider than the interval between the plurality of organic EL panels arranged on the outer peripheral side in the light emitting unit.
　好ましくは、上記発光部は、上記有機ＥＬパネルが設けられる有機ＥＬパネル配設領域と、上記有機ＥＬパネルが設けられない有機ＥＬパネル非配設領域と、を含み、上記有機ＥＬパネル配設領域および上記有機ＥＬパネル非配設領域は、互いに同一の間隔を空けて配列され、全体として行列方向に沿って並んで配置される。 Preferably, the light emitting unit includes an organic EL panel disposition area where the organic EL panel is provided, and an organic EL panel disposition area where the organic EL panel is not disposed, and the organic EL panel disposition area The organic EL panel non-arrangement regions are arranged at the same interval, and are arranged side by side along the matrix direction as a whole.
　好ましくは、上記発光部内の中央側においては、上記有機ＥＬパネル配設領域および上記有機ＥＬパネル非配設領域は、千鳥状に配置される。 Preferably, the organic EL panel disposition region and the organic EL panel non-disposition region are arranged in a staggered manner on the center side in the light emitting unit.
　本発明によれば、面状に配列された複数の有機ＥＬパネルを備える有機ＥＬ照明器具であって、各々の有機ＥＬパネルにおける長寿命化を図ることが可能な有機ＥＬ照明器具を得ることが可能となる。 ADVANTAGE OF THE INVENTION According to this invention, it is an organic EL lighting fixture provided with the some organic EL panel arranged in planar shape, Comprising: Obtaining the organic EL lighting fixture which can aim at the lifetime improvement of each organic EL panel can be obtained. It becomes possible.
本発明に関する比較例における有機ＥＬ照明器具を示す平面図である。It is a top view which shows the organic EL lighting fixture in the comparative example regarding this invention. 図１中のＩＩ－ＩＩ線に沿った矢視断面図である。FIG. 2 is a cross-sectional view taken along the line II-II in FIG. 本発明に関する比較例における有機ＥＬ照明器具を所定の時間連続的に点灯させた際の、発光部内における温度分布を示す平面図である。It is a top view which shows the temperature distribution in the light emission part at the time of making the organic EL lighting fixture in the comparative example regarding this invention light continuously for a predetermined time. 有機ＥＬパネルの動作時における有機ＥＬパネルの温度と、有機ＥＬパネルの耐用期間（時間）との相関関係を示す図である。It is a figure which shows the correlation of the temperature of an organic EL panel at the time of operation | movement of an organic EL panel, and the lifetime (time) of an organic EL panel. 実施の形態１における有機ＥＬ照明器具を示す第１平面図である。1 is a first plan view showing an organic EL lighting fixture in Embodiment 1. FIG. 実施の形態１における有機ＥＬ照明器具を示す第２平面図である。FIG. 3 is a second plan view showing the organic EL lighting device in the first embodiment. 実施の形態１における有機ＥＬ照明器具を所定の時間連続的に点灯させた際の、発光部内における温度分布を示す平面図である。It is a top view which shows the temperature distribution in the light emission part at the time of making the organic EL lighting fixture in Embodiment 1 light continuously for a predetermined time. 実施の形態２における有機ＥＬ照明器具を示す平面図である。6 is a plan view showing an organic EL lighting apparatus in Embodiment 2. FIG. 実施の形態２における有機ＥＬ照明器具を所定の時間連続的に点灯させた際の、発光部内における温度分布を示す平面図である。It is a top view which shows the temperature distribution in the light emission part at the time of making the organic EL lighting fixture in Embodiment 2 light continuously for a predetermined time. 実施の形態２の変形例における有機ＥＬ照明器具を示す平面図である。FIG. 10 is a plan view showing an organic EL lighting device in a modification of the second embodiment.
　［比較例］
　本発明に基づいた各実施の形態について説明する前に、本発明に関する比較例について、以下、図面を参照しながら説明する。図１は、本比較例における有機ＥＬ照明器具１００を示す平面図である。図２は、図１中のＩＩ－ＩＩ線に沿った矢視断面図である。 [Comparative example]
Before describing each embodiment based on this invention, the comparative example regarding this invention is demonstrated referring drawings below. FIG. 1 is a plan view showing an organic EL lighting apparatus 100 in this comparative example. 2 is a cross-sectional view taken along the line II-II in FIG.
　図１および図２に示すように、有機ＥＬ照明器具１００は、複数の有機ＥＬパネル１が面状に配列されることによって構成される発光部１０と、複数の有機ＥＬパネル１を天井（図示せず）または壁面（図示せず）などに固定するための筐体２０と、複数の有機ＥＬパネル１の各々に電流を供給する駆動回路（図示せず）と、を備える。 As shown in FIGS. 1 and 2, an organic EL lighting apparatus 100 includes a light emitting unit 10 configured by arranging a plurality of organic EL panels 1 in a plane and a plurality of organic EL panels 1 on a ceiling (see FIG. 1). A housing 20 for fixing to a wall surface (not shown) or the like, and a drive circuit (not shown) for supplying a current to each of the plurality of organic EL panels 1.
　略同一の面積を有する複数の有機ＥＬパネル１は、５枚×５枚のいわゆるマトリックス状に配列される。隣り合う有機ＥＬパネル１同士の間には、行方向（図１紙面左右方向）および列方向（図１紙面上下方向）の双方において、間隔Ｄ１が設けられる。 A plurality of organic EL panels 1 having substantially the same area are arranged in a so-called matrix of 5 × 5. A space D1 is provided between adjacent organic EL panels 1 in both the row direction (left and right direction in FIG. 1) and the column direction (up and down direction in FIG. 1).
　複数の有機ＥＬパネル１は、筐体２０に取り付けられる。複数の有機ＥＬパネル１が発光している際、複数の有機ＥＬパネル１において発生する熱は、筐体２０に伝えられる。筐体２０は、複数の有機ＥＬパネル１に対して、放熱体として機能する。 The plurality of organic EL panels 1 are attached to the housing 20. When the plurality of organic EL panels 1 emit light, heat generated in the plurality of organic EL panels 1 is transmitted to the housing 20. The housing 20 functions as a heat radiator for the plurality of organic EL panels 1.
　筐体２０に対して、発光部１０の占有面積が相対的に大きくなるように構成される場合がある。発光部１０内における外周側に配置された有機ＥＬパネル１は、周囲に配置される有機ＥＬパネルの数が限られているため、筐体２０の放熱作用によって昇温しにくい。 There may be a case where the occupied area of the light emitting unit 10 is relatively large with respect to the housing 20. The organic EL panel 1 disposed on the outer peripheral side in the light emitting unit 10 has a limited number of organic EL panels disposed on the periphery thereof, and thus is not easily heated due to the heat dissipation action of the housing 20.
　一方、発光部１０内における中央側に配置された有機ＥＬパネル１は、その周囲が他の複数の有機ＥＬパネル１によって取り囲まれている。 On the other hand, the periphery of the organic EL panel 1 arranged on the center side in the light emitting unit 10 is surrounded by other organic EL panels 1.
　有機ＥＬパネル１への筐体２０による放熱作用は、発光部１０内における中央側に配置された有機ＥＬパネル１の方が、発光部１０内における外周側に配置された有機ＥＬパネル１に比べて低い。複数の有機ＥＬパネル１同士の間の間隔Ｄ１が狭くなるように構成される場合、発光部１０内における中央側に配置された有機ＥＬパネル１における放熱効率は一層低下することとなる。 The heat dissipation action by the housing 20 on the organic EL panel 1 is such that the organic EL panel 1 arranged on the center side in the light emitting unit 10 is compared with the organic EL panel 1 arranged on the outer peripheral side in the light emitting unit 10. Low. In the case where the interval D1 between the plurality of organic EL panels 1 is configured to be narrow, the heat dissipation efficiency in the organic EL panel 1 disposed on the center side in the light emitting unit 10 is further reduced.
　図３は、有機ＥＬ照明器具１００を所定の時間連続的に点灯させた際の、発光部１０内における温度分布を示す平面図である。図３を参照して、有機ＥＬ照明器具１００においては、複数の有機ＥＬパネル１同士の間に放熱効率の差が生じている。この放熱効率の差が原因となって、発光部１０内における最中央側に位置する有機ＥＬパネル１（１ｃ）およびその外周に位置する有機ＥＬパネル１（１ｂ）同士の間の境界線Ｒｃ付近においては、周囲の環境温度に対してたとえば＋１５℃の温度上昇が生じる。 FIG. 3 is a plan view showing a temperature distribution in the light emitting unit 10 when the organic EL lighting apparatus 100 is continuously turned on for a predetermined time. With reference to FIG. 3, in the organic EL lighting apparatus 100, a difference in heat dissipation efficiency occurs between the plurality of organic EL panels 1. Due to this difference in heat dissipation efficiency, the vicinity of the boundary line Rc between the organic EL panel 1 (1c) located on the most central side in the light emitting unit 10 and the organic EL panel 1 (1b) located on the outer periphery thereof In the case, a temperature rise of, for example, + 15 ° C. occurs with respect to the ambient environmental temperature.
　有機ＥＬパネル１（１ｂ）およびその外周側に位置する有機ＥＬパネル１（１ａ）同士の間の境界線Ｒｂ付近においては、周囲の環境温度に対してたとえば＋１０℃の温度上昇が生じる。有機ＥＬパネル１（１ａ）の外側に位置する境界線Ｒａ付近においては、周囲の環境温度に対してたとえば＋５℃の温度上昇が生じる。 In the vicinity of the boundary line Rb between the organic EL panel 1 (1b) and the organic EL panel 1 (1a) located on the outer peripheral side thereof, a temperature increase of, for example, + 10 ° C. occurs with respect to the ambient environmental temperature. In the vicinity of the boundary line Ra located outside the organic EL panel 1 (1a), a temperature increase of, for example, + 5 ° C. occurs with respect to the ambient environmental temperature.
　このように、有機ＥＬパネル１（１ｂ）付近の放熱効率が有機ＥＬパネル１（１ａ）の放熱効率よりも低くなり、有機ＥＬパネル１（１ｃ）付近の放熱効率が有機ＥＬパネル１（１ｂ）の放熱効率よりも低くなることによって、発光部１０の中央側の温度は、発光部１０の外周側の温度よりも高くなる。 Thus, the heat dissipation efficiency near the organic EL panel 1 (1b) is lower than the heat dissipation efficiency of the organic EL panel 1 (1a), and the heat dissipation efficiency near the organic EL panel 1 (1c) is lower than the organic EL panel 1 (1b). As a result, the temperature on the center side of the light emitting unit 10 becomes higher than the temperature on the outer peripheral side of the light emitting unit 10.
　有機ＥＬパネルは有機材料から構成され、様々な要因によってこの有機材料は劣化する。一般には、有機ＥＬパネルの動作時における有機ＥＬパネルの温度と有機ＥＬパネルの耐用期間（時間）との間には、次のような相関関係が存在している。 An organic EL panel is composed of an organic material, and this organic material deteriorates due to various factors. In general, the following correlation exists between the temperature of the organic EL panel during the operation of the organic EL panel and the useful life (time) of the organic EL panel.
　図４は、有機ＥＬパネルの動作時における有機ＥＬパネルの温度と、有機ＥＬパネルの耐用期間（時間）との相関関係Ｌ１０を示す図である。図４における有機ＥＬパネルの耐用期間（時間）とは、一定の電流を有機ＥＬパネルに通電した際に、初期の状態に比べて所定の輝度（たとえば７０％または５０％など）にまで低下するまでの時間を意味している。 FIG. 4 is a diagram showing a correlation L10 between the temperature of the organic EL panel during the operation of the organic EL panel and the useful life (time) of the organic EL panel. The lifetime (time) of the organic EL panel in FIG. 4 is reduced to a predetermined luminance (for example, 70% or 50%) as compared with the initial state when a constant current is applied to the organic EL panel. Means the time until.
　図４において、有機ＥＬパネルの動作時における有機ＥＬパネルの温度Ｔの際の耐用期間をＬ（Ｔ）とすると、Ｌ（Ｔ１）＝Ｌ１、Ｌ（Ｔ２）＝Ｌ２、そして、Ｌ（Ｔ３）＝Ｌ３である。Ｔ１＋５℃＝Ｔ２であり、Ｔ２＋５℃＝Ｔ３であるとすると、たとえば、Ｌ１×０．８＝Ｌ２となり、Ｌ２×０．８＝Ｌ３となる。この場合、有機ＥＬパネルの動作時における有機ＥＬパネルの温度が５℃上昇すると、耐用期間は０．８倍に低下することとなる。 In FIG. 4, when the lifetime of the organic EL panel at the temperature T during the operation of the organic EL panel is L (T), L (T1) = L1, L (T2) = L2, and L (T3) = L3. Assuming that T1 + 5 ° C. = T2 and T2 + 5 ° C. = T3, for example, L1 × 0.8 = L2 and L2 × 0.8 = L3. In this case, when the temperature of the organic EL panel during the operation of the organic EL panel is increased by 5 ° C., the useful life is reduced by a factor of 0.8.
　上述のとおり、図３中に示す有機ＥＬ照明器具１００においては、最外周側に位置する有機ＥＬパネル１（１ａ）に比べて、その一つ内側に位置する有機ＥＬパネル１（１ｂ）には、＋５℃の温度上昇が生じる。その結果、最外周側に位置する有機ＥＬパネル１（１ａ）に比べて、その一つ内側に位置する有機ＥＬパネル１（１ｂ）は、耐用期間が０．８倍となる。 As described above, in the organic EL lighting apparatus 100 shown in FIG. 3, the organic EL panel 1 (1 b) located on the inner side of the organic EL panel 1 (1 a) located on the outermost peripheral side has A temperature increase of + 5 ° C. occurs. As a result, the lifetime of the organic EL panel 1 (1b) positioned on the inner side of the organic EL panel 1 (1a) positioned on the outermost peripheral side is 0.8 times as long as the lifetime.
　最外周側に位置する有機ＥＬパネル１（１ａ）に比べて、その二つ内側（発光部１０としては最中央側）に位置する有機ＥＬパネル１（１ｃ）には、＋１０℃の温度上昇が生じる。その結果、最外周側に位置する有機ＥＬパネル１（１ａ）に比べて、その二つ内側に位置する有機ＥＬパネル１（１ｃ）は、耐用期間が０．６４倍（＝０．８倍×０．８倍）となる。このように、中央側に配置された有機ＥＬパネルほど、耐用期間が短くなることになる。 Compared to the organic EL panel 1 (1a) located on the outermost peripheral side, the organic EL panel 1 (1c) located on the two inner sides (the central side as the light emitting unit 10) has a temperature increase of + 10 ° C. Arise. As a result, compared with the organic EL panel 1 (1a) located on the outermost peripheral side, the organic EL panel 1 (1c) located on the two inner sides has a lifetime of 0.64 times (= 0.8 times × 0.8 times). Thus, the lifetime of the organic EL panel arranged on the center side is shortened.
　有機ＥＬ照明器具１００としては、各々の有機ＥＬパネル１が、筐体２０から容易には取り外しできないように構成される場合がある。この場合、有機ＥＬパネル１（１ａ），１（１ｂ）が耐用期間の満了に達していないにもかかわらず、有機ＥＬ照明器具１００の全体としての耐用期間は有機ＥＬパネル１（１ｃ）によって律速されてしまい、有機ＥＬ照明器具１００としての耐用期間も短くなる。各々の有機ＥＬパネル１を筐体２０から取り外し可能なように有機ＥＬ照明器具１００が構成される場合であっても、有機ＥＬパネル１（１ｃ）のみを頻繁に交換する必要が生じる。 The organic EL lighting apparatus 100 may be configured such that each organic EL panel 1 cannot be easily removed from the housing 20. In this case, although the organic EL panels 1 (1a) and 1 (1b) have not reached the end of their useful life, the overall useful life of the organic EL lighting apparatus 100 is rate-determined by the organic EL panel 1 (1c). As a result, the useful life of the organic EL lighting apparatus 100 is shortened. Even when the organic EL lighting apparatus 100 is configured such that each organic EL panel 1 can be removed from the housing 20, it is necessary to frequently replace only the organic EL panel 1 (1c).
　［実施の形態］
　以下、本発明に基づいた各実施の形態について、図面を参照しながら説明する。各実施の形態の説明において、個数、量などに言及する場合、特に記載がある場合を除き、本発明の範囲は必ずしもその個数、量などに限定されない。各実施の形態の説明において、同一の部品、相当部品に対しては、同一の参照番号を付し、重複する説明は繰り返さない場合がある。特に制限が無い限り、各実施の形態に示す構成を適宜組み合わせて用いることは、当初から予定されていることである。 [Embodiment]
Hereinafter, embodiments according to the present invention will be described with reference to the drawings. In the description of each embodiment, when referring to the number, amount, or the like, the scope of the present invention is not necessarily limited to the number, amount, or the like unless otherwise specified. In the description of each embodiment, the same parts and corresponding parts are denoted by the same reference numerals, and redundant description may not be repeated. Unless there is a restriction | limiting in particular, it is planned from the beginning to use suitably combining the structure shown in each embodiment.
　［実施の形態１］
　図５および図６を参照して、本実施の形態における有機ＥＬ照明器具１０１について説明する。図５は、有機ＥＬ照明器具１０１を示す第１平面図である。図６は、有機ＥＬ照明器具１０１を示す第２平面図である。 [Embodiment 1]
With reference to FIG. 5 and FIG. 6, the organic EL lighting fixture 101 in this Embodiment is demonstrated. FIG. 5 is a first plan view showing the organic EL lighting fixture 101. FIG. 6 is a second plan view showing the organic EL lighting fixture 101.
　図５に示すように、有機ＥＬ照明器具１０１は、複数の有機ＥＬパネル１が面状に配列されることによって構成される発光部１０と、複数の有機ＥＬパネル１を天井（図示せず）または壁面（図示せず）などに固定するための筐体２０と、複数の有機ＥＬパネル１の各々に電流を供給する駆動回路（図示せず）と、を備える。 As shown in FIG. 5, the organic EL lighting apparatus 101 includes a light emitting unit 10 configured by arranging a plurality of organic EL panels 1 in a planar shape, and a plurality of organic EL panels 1 on a ceiling (not shown). Or the housing | casing 20 for fixing to a wall surface (not shown) etc., and the drive circuit (not shown) which supplies an electric current to each of the some organic EL panel 1 are provided.
　本実施の形態における有機ＥＬ照明器具１０１においては、略同一の面積を有する２０枚の有機ＥＬパネル１が用いられる。具体的には、１６枚の有機ＥＬパネル１（１ａ）が、発光部１０内の外周側において環状に配置される。隣り合う有機ＥＬパネル１（１ａ）同士の間には、横方向（図５紙面左右方向）および縦方向（図５紙面上下方向）の双方において、間隔Ｄ１が設けられる。 In the organic EL lighting fixture 101 in the present embodiment, 20 organic EL panels 1 having substantially the same area are used. Specifically, 16 organic EL panels 1 (1 a) are arranged in a ring shape on the outer peripheral side in the light emitting unit 10. A space D1 is provided between the adjacent organic EL panels 1 (1a) in both the horizontal direction (left and right direction in FIG. 5) and the vertical direction (up and down direction in FIG. 5).
　４枚の有機ＥＬパネル１（１ｂ）は、発光部１０内の有機ＥＬパネル１（１ａ）の内側において環状に配置される。４枚の有機ＥＬパネル１（１ａ）は、発光部１０内の中央側に位置している。隣り合う有機ＥＬパネル１（１ｂ）同士の間には、横方向（図５紙面左右方向）および縦方向（図５紙面上下方向）の双方において、間隔Ｄ２が設けられる。また、有機ＥＬパネル１（１ｂ）とこの有機ＥＬパネル１（１ｂ）に最も近い有機ＥＬパネル１（１ａ）との間にも、間隔Ｄ２が設けられる。間隔Ｄ２は、間隔Ｄ１よりも広い。 The four organic EL panels 1 (1b) are annularly arranged inside the organic EL panel 1 (1a) in the light emitting unit 10. The four organic EL panels 1 (1 a) are located on the center side in the light emitting unit 10. A space D2 is provided between the adjacent organic EL panels 1 (1b) both in the horizontal direction (left and right direction in FIG. 5) and in the vertical direction (up and down direction in FIG. 5). Further, a distance D2 is also provided between the organic EL panel 1 (1b) and the organic EL panel 1 (1a) closest to the organic EL panel 1 (1b). The interval D2 is wider than the interval D1.
　複数の有機ＥＬパネル１は、筐体２０に取り付けられる。複数の有機ＥＬパネル１が発光している際、複数の有機ＥＬパネル１において発生する熱は、筐体２０に伝えられる。筐体２０は、複数の有機ＥＬパネル１に対して、放熱体として機能する。 The plurality of organic EL panels 1 are attached to the housing 20. When the plurality of organic EL panels 1 emit light, heat generated in the plurality of organic EL panels 1 is transmitted to the housing 20. The housing 20 functions as a heat radiator for the plurality of organic EL panels 1.
　図６を参照して、有機ＥＬ照明器具１０１においては、複数の有機ＥＬパネル１の各々が上記のように配置されることによって、発光部１０内における複数の有機ＥＬパネル１の密集の度合い（密集度）は、発光部１０内の外周側に比べて発光部１０内の中央側の方が小さくなっている。 Referring to FIG. 6, in organic EL lighting apparatus 101, each of the plurality of organic EL panels 1 is arranged as described above, whereby the degree of congestion of the plurality of organic EL panels 1 in light emitting unit 10 ( The density is smaller on the central side in the light emitting unit 10 than on the outer peripheral side in the light emitting unit 10.
　具体的には、発光部１０を、外周側発光部１０ａと中央側発光部１０ｂとに分けたとする。有機ＥＬパネル１の１枚の面積は、（Ｗ１×Ｗ１）であるとする。中央側発光部１０ｂの面積が（Ｗｂ×Ｗｂ）であるとすると、外周側発光部１０ａの面積は、（Ｗａ×Ｗａ－Ｗｂ×Ｗｂ）である。 Specifically, it is assumed that the light emitting unit 10 is divided into an outer peripheral side light emitting unit 10a and a central side light emitting unit 10b. The area of one organic EL panel 1 is assumed to be (W1 × W1). If the area of the central light emitting unit 10b is (Wb × Wb), the area of the outer peripheral light emitting unit 10a is (Wa × Wa−Wb × Wb).
　この場合、外周側発光部１０ａにおける密集度は、（Ｗ１×Ｗ１）×１６枚／［（Ｗａ×Ｗａ－Ｗｂ×Ｗｂ）］によって表される。中央側発光部１０ｂにおける密集度は、（Ｗ１×Ｗ１）×４枚／（Ｗｂ×Ｗｂ）によって表される。（外周側発光部１０ａにおける密集度）＞（中央側発光部１０ｂにおける密集度）が成立するように、上記の各寸法が設計される。 In this case, the density in the outer peripheral side light emitting unit 10a is expressed by (W1 × W1) × 16 sheets / [(Wa × Wa−Wb × Wb)]. The density of the central light emitting unit 10b is represented by (W1 × W1) × 4 / (Wb × Wb). Each of the above dimensions is designed so that (the density in the outer peripheral side light emitting part 10a)> (the density in the central side light emitting part 10b) is established.
　本実施の形態において、たとえば、Ｗ１＝１２ｃｍ、Ｗａ＝８０ｃｍ、Ｗｂ＝４０ｃｍとすると、上記の式から、外周側発光部１０ａにおける密集度は４８％となり、中央側発光部１０ｂにおける密集度は３６％となる。（外周側発光部１０ａにおける密集度）＞（中央側発光部１０ｂにおける密集度）の関係が満足される。この場合、図５における間隔Ｄ１は約３．５ｃｍとなり、図５における間隔Ｄ２は約８．３ｃｍとなる。図７は、有機ＥＬ照明器具１０１を所定の時間連続的に点灯させた際の、発光部１０内における温度分布を示す平面図である。図７に示すように、有機ＥＬ照明器具１０１によれば、発光部１０内の中央側において、各々の有機ＥＬパネル１（１ｂ）周りの放熱効率が向上する。発光部１０内の中央側における局所的な温度上昇が抑制されるため、領域Ｒｄ内の全体として、略均一な温度分布が形成される。 In the present embodiment, for example, if W1 = 12 cm, Wa = 80 cm, and Wb = 40 cm, the density on the outer peripheral side light emitting unit 10a is 48% and the density on the central side light emitting unit 10b is 36 from the above formula. %. The relationship of (the density in the outer peripheral side light emitting part 10a)> (the density in the central light emitting part 10b) is satisfied. In this case, the distance D1 in FIG. 5 is about 3.5 cm, and the distance D2 in FIG. 5 is about 8.3 cm. FIG. 7 is a plan view showing a temperature distribution in the light emitting unit 10 when the organic EL lighting fixture 101 is continuously turned on for a predetermined time. As shown in FIG. 7, according to the organic EL lighting apparatus 101, the heat dissipation efficiency around each organic EL panel 1 (1 b) is improved on the center side in the light emitting unit 10. Since a local temperature rise on the center side in the light emitting unit 10 is suppressed, a substantially uniform temperature distribution is formed as a whole in the region Rd.
　したがって、各々の有機ＥＬパネル１における耐用期間のばらつきは緩和され、各々の有機ＥＬパネル１の全体としての長寿命化を図ることが可能となる。一部の有機ＥＬパネル１の耐用期間の満了によって有機ＥＬ照明器具１０１の全体としての耐用期間が律速されることもなく、また、一部の有機ＥＬパネル１のみを頻繁に交換する必要もない。 Therefore, the variation in the service life of each organic EL panel 1 is alleviated, and it is possible to extend the life of each organic EL panel 1 as a whole. The lifetime of the organic EL lighting fixture 101 as a whole is not limited by the expiration of the lifetime of some of the organic EL panels 1, and it is not necessary to frequently replace only some of the organic EL panels 1. .
　［実施の形態２］
　図８を参照して、本実施の形態における有機ＥＬ照明器具１０２について説明する。図８は、有機ＥＬ照明器具１０２を示す平面図である。 [Embodiment 2]
With reference to FIG. 8, the organic EL lighting fixture 102 in this Embodiment is demonstrated. FIG. 8 is a plan view showing the organic EL lighting fixture 102.
　図８に示すように、有機ＥＬ照明器具１０２は、複数の有機ＥＬパネル１が面状に配列されることによって構成される発光部１０と、複数の有機ＥＬパネル１を天井（図示せず）または壁面（図示せず）などに固定するための筐体２０と、複数の有機ＥＬパネル１の各々に電流を供給する駆動回路（図示せず）と、を備える。 As shown in FIG. 8, the organic EL lighting fixture 102 includes a light emitting unit 10 configured by arranging a plurality of organic EL panels 1 in a planar shape, and a plurality of organic EL panels 1 on a ceiling (not shown). Or the housing | casing 20 for fixing to a wall surface (not shown) etc., and the drive circuit (not shown) which supplies an electric current to each of the some organic EL panel 1 are provided.
　本実施の形態における発光部１０は、有機ＥＬパネル１が設けられる有機ＥＬパネル配設領域Ａ１と、有機ＥＬパネル１が設けられない有機ＥＬパネル非配設領域Ａ２と、を含む。各々の有機ＥＬパネル配設領域Ａ１および各々の有機ＥＬパネル非配設領域Ａ２は、互いに間隔Ｄ１を空けて配列されるとともに、全体として行列方向に沿って並んで（いわゆるマトリックス状に）配置される。さらに、本実施の形態における発光部１０内の中央側においては、複数の有機ＥＬパネル配設領域Ａ１および有機ＥＬパネル非配設領域Ａ２同士が千鳥状に配列される。 The light emitting unit 10 in the present embodiment includes an organic EL panel placement area A1 where the organic EL panel 1 is provided, and an organic EL panel non-placement area A2 where the organic EL panel 1 is not provided. Each organic EL panel disposition area A1 and each organic EL panel non-disposition area A2 are arranged with a distance D1 between them and arranged side by side along the matrix direction as a whole (in a so-called matrix form). The Furthermore, in the center side in the light emission part 10 in this Embodiment, several organic EL panel arrangement | positioning area | region A1 and organic EL panel non-arrangement area | region A2 are arranged in zigzag form.
　有機ＥＬ照明器具１０２においても、複数の有機ＥＬパネル１の各々が上記のように配置されることによって、発光部１０内における複数の有機ＥＬパネル１の密集の度合い（密集度）は、発光部１０内の外周側に比べて発光部１０内の中央側の方が小さくなっている。 Also in the organic EL lighting fixture 102, each of the plurality of organic EL panels 1 is arranged as described above, so that the degree of density (density) of the plurality of organic EL panels 1 in the light emitting unit 10 is increased. Compared to the outer peripheral side in 10, the center side in the light emitting unit 10 is smaller.
　図８は、有機ＥＬ照明器具１０２を所定の時間連続的に点灯させた際の、発光部１０内における温度分布を示す平面図である。図８に示すように、有機ＥＬ照明器具１０２によれば、発光部１０内の中央側において、各々の有機ＥＬパネル１（１ｂ）周りの放熱効率が向上する。発光部１０内の中央側における局所的な温度上昇が抑制されるため、領域Ｒｄ内の全体として略均一な温度分布が形成される。 FIG. 8 is a plan view showing a temperature distribution in the light emitting unit 10 when the organic EL lighting apparatus 102 is continuously turned on for a predetermined time. As shown in FIG. 8, according to the organic EL lighting fixture 102, the heat dissipation efficiency around each organic EL panel 1 (1 b) is improved on the center side in the light emitting unit 10. Since a local temperature rise on the center side in the light emitting unit 10 is suppressed, a substantially uniform temperature distribution is formed as a whole in the region Rd.
　したがって、各々の有機ＥＬパネル１における耐用期間のばらつきは緩和され、各々の有機ＥＬパネル１の全体としての長寿命化を図ることが可能となる。また、有機ＥＬ照明器具１０２においては、各々の有機ＥＬパネル配設領域Ａ１および各々の有機ＥＬパネル非配設領域Ａ２が、互いに間隔Ｄ１を空けて配列されるとともに、全体として行列方向に沿って並んで配置される。当該構成によれば、設計上および生産上の効率化を図ることも可能となり、製造費用を低減することもできる。 Therefore, the variation in the service life of each organic EL panel 1 is alleviated, and it is possible to extend the life of each organic EL panel 1 as a whole. Further, in the organic EL lighting fixture 102, each organic EL panel placement area A1 and each organic EL panel non-placement area A2 are arranged with a distance D1 from each other, and as a whole along the matrix direction. Arranged side by side. According to this configuration, it is possible to improve design and production efficiency, and manufacturing costs can be reduced.
　また、図１０に示す有機ＥＬ照明器具１０２ａのように、発光部１０内の最中央にのみ有機ＥＬパネル非配設領域Ａ２を設けてもよい。この場合、照明装置としての発光輝度を向上させることも可能となる。 Further, like the organic EL lighting fixture 102a shown in FIG. 10, the organic EL panel non-arrangement region A2 may be provided only at the center of the light emitting unit 10. In this case, it is also possible to improve the light emission luminance as the lighting device.
　以上、本発明に基づいた各実施の形態について説明したが、今回開示された各実施の形態はすべての点で例示であって制限的なものではない。本発明の技術的範囲は請求の範囲によって示され、請求の範囲と均等の意味および範囲内でのすべての変更が含まれることが意図される。 As mentioned above, although each embodiment based on this invention was described, each embodiment disclosed this time is an illustration and restrictive at no points. The technical scope of the present invention is defined by the terms of the claims, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.
　１，１ａ，１ｂ，１ｃ　有機ＥＬパネル、１０　発光部、１０ａ　外周側発光部、１０ｂ　中央側発光部、２０　筐体、１００，１０１，１０２，１０２ａ　照明器具、Ａ１　有機ＥＬパネル配設領域、Ａ２　有機ＥＬパネル非配設領域。 1, 1a, 1b, 1c Organic EL panel, 10 light emitting part, 10a outer peripheral side light emitting part, 10b central side light emitting part, 20 housing, 100, 101, 102, 102a lighting fixture, A1 organic EL panel installation area, A2 Organic EL panel non-arrangement area.

Claims (4)

  1. 　複数の有機ＥＬパネル（１）が面状に配列された発光部（１０）を備え、
    　前記発光部（１０）内における複数の前記有機ＥＬパネル（１）の密集の度合いは、前記発光部（１０）内の外周側に比べて前記発光部（１０）内の中央側の方が小さい、
    有機ＥＬ照明器具。     A plurality of organic EL panels (1) are provided with a light emitting section (10) arranged in a plane,
    The degree of density of the plurality of organic EL panels (1) in the light emitting unit (10) is smaller on the center side in the light emitting unit (10) than on the outer peripheral side in the light emitting unit (10). ,
    Organic EL lighting equipment.
  2. 　前記発光部（１０）内の中央側に配置される複数の前記有機ＥＬパネル（１）同士の間隔（Ｄ２）は、前記発光部（１０）内の外周側に配置される複数の前記有機ＥＬパネル（１）同士の間隔（Ｄ１）よりも広い、
    請求項１に記載の有機ＥＬ照明器具。     The intervals (D2) between the plurality of organic EL panels (1) arranged on the center side in the light emitting unit (10) are the plurality of organic ELs arranged on the outer peripheral side in the light emitting unit (10). Wider than the distance (D1) between the panels (1),
    The organic EL lighting fixture according to claim 1.
  3. 　前記発光部（１０）は、前記有機ＥＬパネル（１）が設けられる有機ＥＬパネル配設領域（Ａ１）と、前記有機ＥＬパネル（１）が設けられない有機ＥＬパネル非配設領域（Ａ２）と、を含み、
    　前記有機ＥＬパネル配設領域（Ａ１）および前記有機ＥＬパネル非配設領域（Ａ２）は、互いに同一の間隔（Ｄ１）を空けて配列され、全体として行列方向に沿って並んで配置される、
    請求項１に記載の有機ＥＬ照明器具。     The light emitting unit (10) includes an organic EL panel placement area (A1) where the organic EL panel (1) is provided, and an organic EL panel non-placement area (A2) where the organic EL panel (1) is not provided. And including
    The organic EL panel disposition area (A1) and the organic EL panel non-arrangement area (A2) are arranged at the same interval (D1) from each other, and are arranged side by side along the matrix direction as a whole.
    The organic EL lighting fixture according to claim 1.
  4. 　前記発光部（１０）内の中央側においては、前記有機ＥＬパネル配設領域（Ａ１）および前記有機ＥＬパネル非配設領域（Ａ２）は、千鳥状に配置される、
    請求項３に記載の有機ＥＬ照明器具。     On the center side in the light emitting section (10), the organic EL panel disposition region (A1) and the organic EL panel non-disposition region (A2) are disposed in a staggered manner.
    The organic EL lighting device according to claim 3.
PCT/JP2012/061544 2011-06-14 2012-05-01 Organic el illumination device WO2012172880A1 (en)

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JP2007059139A (en) * 2005-08-23 2007-03-08 Casio Comput Co Ltd Light source device
JP2009146646A (en) * 2007-12-12 2009-07-02 Nec Lighting Ltd Plane light source unit and lighting device using the unit
JP2010049865A (en) * 2008-08-20 2010-03-04 Sharp Corp Lighting apparatus
JP2010243540A (en) * 2009-04-01 2010-10-28 Seiko Epson Corp Electrooptical device and electronic equipment

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