JP2008270248A - Lighting system - Google Patents
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- JP2008270248A JP2008270248A JP2007106894A JP2007106894A JP2008270248A JP 2008270248 A JP2008270248 A JP 2008270248A JP 2007106894 A JP2007106894 A JP 2007106894A JP 2007106894 A JP2007106894 A JP 2007106894A JP 2008270248 A JP2008270248 A JP 2008270248A
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- 238000005401 electroluminescence Methods 0.000 claims abstract description 14
- 230000014509 gene expression Effects 0.000 claims abstract 4
- 238000005286 illumination Methods 0.000 claims description 6
- 230000000452 restraining effect Effects 0.000 abstract 1
- 230000007547 defect Effects 0.000 description 12
- 239000010410 layer Substances 0.000 description 8
- 230000000052 comparative effect Effects 0.000 description 6
- 229920001609 Poly(3,4-ethylenedioxythiophene) Polymers 0.000 description 3
- 238000011156 evaluation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000012044 organic layer Substances 0.000 description 2
- VQGHOUODWALEFC-UHFFFAOYSA-N 2-phenylpyridine Chemical compound C1=CC=CC=C1C1=CC=CC=N1 VQGHOUODWALEFC-UHFFFAOYSA-N 0.000 description 1
- 229920000144 PEDOT:PSS Polymers 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- UFVXQDWNSAGPHN-UHFFFAOYSA-K bis[(2-methylquinolin-8-yl)oxy]-(4-phenylphenoxy)alumane Chemical compound [Al+3].C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC=C([O-])C2=NC(C)=CC=C21.C1=CC([O-])=CC=C1C1=CC=CC=C1 UFVXQDWNSAGPHN-UHFFFAOYSA-K 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005525 hole transport Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- IBHBKWKFFTZAHE-UHFFFAOYSA-N n-[4-[4-(n-naphthalen-1-ylanilino)phenyl]phenyl]-n-phenylnaphthalen-1-amine Chemical compound C1=CC=CC=C1N(C=1C2=CC=CC=C2C=CC=1)C1=CC=C(C=2C=CC(=CC=2)N(C=2C=CC=CC=2)C=2C3=CC=CC=C3C=CC=2)C=C1 IBHBKWKFFTZAHE-UHFFFAOYSA-N 0.000 description 1
- 238000000059 patterning Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
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Abstract
Description
本発明は、有機エレクトロルミネッセンスからなる面光源の照明装置に関する。 The present invention relates to an illumination device for a surface light source made of organic electroluminescence.
有機エレクトロルミネッセンスは、薄くて色調整が自由で照明用途に有用である。 Organic electroluminescence is thin and free of color adjustment and is useful for lighting applications.
有機エレクトロルミネッセンスを用いた照明用の発光パネルにおいて、パネルを大面積発光にする場合、単発光領域にすると一つのショート不良で全面が非発光になる問題がある。この対策として、一つのパネルが故障して非発光になった場合に、他の発光領域は発光し続けることができる、または非発光パネルを交換できるようにするために、複数の発光領域、また複数のパネルに分けることが望ましい。特許文献１では複数のパネルを直列接続する方法、特許文献２、３には複数のパネルを直列、並列接続する方法が開示されている。
In a light emitting panel for lighting using organic electroluminescence, when the panel emits light in a large area, there is a problem that if the single light emitting region is used, the entire surface does not emit light due to a single short-circuit failure. As a countermeasure, if one panel fails and does not emit light, the other light emitting areas can continue to emit light, or multiple light emitting areas or It is desirable to divide into multiple panels. Patent Document 1 discloses a method of connecting a plurality of panels in series, and
しかし、その際、パネルを適当な比率で直列、並列で接続しないと、直列数が大きいと必要な電圧が高くなるため家庭用電源電圧を越えてしまう、輝度ムラや故障の際の輝度変動が大きいという問題があった。
本発明は、上記課題に鑑みなされたものであり、その目的は、家庭用電源が使用可能で、かつ輝度ムラや故障の際の輝度変動を小さく抑えることが可能な有機エレクトロルミネッセンスからなる面光源の照明装置を提供することにある。 The present invention has been made in view of the above problems, and an object of the present invention is to provide a surface light source composed of organic electroluminescence that can use a household power source and can suppress brightness unevenness and brightness fluctuation in the event of a failure. It is in providing the illuminating device.
本発明の上記課題は、以下の構成により達成される。 The above object of the present invention is achieved by the following configurations.
１．複数の発光領域によって形成された有機エレクトロルミネッセンスからなる面光源の照明装置であって、ｍ個の発光領域が直列に接続されてなる発光領域群を形成し、該発光領域群がｎ個並列に接続されており、ｍ、ｎが下記式を満たすことを特徴とする照明装置。 1. An illumination device for a surface light source composed of organic electroluminescence formed by a plurality of light emitting regions, wherein a light emitting region group is formed by connecting m light emitting regions in series, and the n light emitting region groups are arranged in parallel. A lighting device, wherein m and n satisfy the following formula.
９≦ｍ≦２５ かつ ４≦ｎ
（式中、ｍ、ｎは整数を表す。）
２．前記発光領域の一つの面積が５０×５０ｍｍ以下であることを特徴とする前記１に記載の照明装置。
9 ≦ m ≦ 25 and 4 ≦ n
(In the formula, m and n represent integers.)
2. 2. The illumination device according to 1 above, wherein one area of the light emitting region is 50 × 50 mm or less.
３．前記ｍ、ｎが下記式を満たすことを特徴とする前記１または２に記載の照明装置。 3. 3. The lighting device according to 1 or 2, wherein m and n satisfy the following formula.
０．５ｍ≦ｎ≦２ｍ
４．前記ｍ、ｎが下記式を満たすことを特徴とする前記３に記載の照明装置。
0.5m ≦ n ≦ 2m
4). 4. The lighting device according to 3 above, wherein m and n satisfy the following formula.
ｍ×ｎ≦４００ m × n ≦ 400
本発明により、家庭用電源が使用可能で、かつ輝度ムラや故障の際の輝度変動を小さく抑えることが可能な有機エレクトロルミネッセンスからなる面光源の照明装置を提供することができる。 According to the present invention, it is possible to provide an illumination device for a surface light source made of organic electroluminescence that can use a household power source and can suppress luminance variations and luminance fluctuations at the time of failure.
本発明者は、上記課題に鑑み鋭意検討を行った結果、（１）複数のパネルを並べて大面積発光する照明装置において、発光領域を直列、並列で接続する場合の数の範囲を限定する。（２）複数のパネルを並べて大面積発光する照明装置において、発光領域を直列、並列で接続する場合の一つの発光領域の面積を限定することにより、上記課題が達成されることを見出し、本発明に至った次第である。 As a result of intensive studies in view of the above problems, the present inventor (1) limits the number of ranges in the case where light emitting regions are connected in series and in parallel in a lighting device that emits a large area by arranging a plurality of panels. (2) In an illuminating apparatus that emits light in a large area by arranging a plurality of panels, it is found that the above-mentioned problem can be achieved by limiting the area of one light emitting region when the light emitting regions are connected in series and in parallel. It is up to the invention.
以下、本発明を実施するための最良の形態について詳細に説明するが、本発明はこれらに限定されない。 Hereinafter, the best mode for carrying out the present invention will be described in detail, but the present invention is not limited thereto.
前述のように、大面積発光にする場合、単発光領域にすると一つのショート不良で全面が非発光になる問題があるため、発光領域を複数に分割する方が望ましい。複数の発光領域は、直列に接続すると一つの発光領域がショート不良になっても、他の発光領域は発光し続けることができる。しかし、直列数が大きいと必要な電圧が高くなるため、家庭用電源電圧（１００Ｖ）を越えてしまう。 As described above, in the case of light emission with a large area, there is a problem that if the single light emitting region is used, the entire surface does not emit light due to a single short defect. When a plurality of light emitting regions are connected in series, even if one light emitting region has a short circuit failure, the other light emitting regions can continue to emit light. However, if the number of series is large, the necessary voltage increases, and thus exceeds the household power supply voltage (100 V).
従って、ある程度の面積の発光領域を得るには、適度な直列数と並列数を組み合わせることが必要である。また、一つの発光領域の面積が大きすぎると発光領域内の輝度分布が大きくなるため、総発光面積に対して一つの発光領域の面積と直列数、並列数との間に好ましい関係が存在する。 Therefore, in order to obtain a light emitting region having a certain area, it is necessary to combine an appropriate number of series and parallel. In addition, if the area of one light emitting region is too large, the luminance distribution in the light emitting region becomes large, and therefore there is a preferable relationship between the area of one light emitting region, the number in series, and the number in parallel with respect to the total light emitting area. .
直列数の下限は、一つの発光領域にショート不良が発生した場合に、他の発光領域に大きな負担増にならない数である。代表的な有機エレクトロルミネッセンスの性能が、１０００ｃｄ／ｍ2、４Ｖ、電圧変動許容が＋０．５Ｖとすると、直列数は９以上となる。直列数の上限は、総電圧が１００Ｖ以下であることが好ましい。同様の性能の場合、直列数は２５以下となる。 The lower limit of the number of series is a number that does not cause a large increase in burden on other light emitting areas when a short circuit failure occurs in one light emitting area. If the performance of typical organic electroluminescence is 1000 cd / m 2 , 4 V, and the voltage fluctuation tolerance is +0.5 V, the number of series becomes 9 or more. The upper limit of the number of series is preferably a total voltage of 100 V or less. For similar performance, the number of series is 25 or less.
一方、断線不良が発生した際に直列の群は全て消灯してしまうことから、並列に幾つかに分かれている方がよい。断線不良が発生した際に、一時的な輝度変化許容が−２５％とすると、並列数は４以上となる。 On the other hand, when a disconnection failure occurs, all the series groups are extinguished. When the disconnection failure occurs, if the temporary luminance change tolerance is −25%, the parallel number is 4 or more.
上記制限から、総発光面積は、直列数９以上、並列数４以上の３６以上の発光領域に分割する必要がある。 Because of the above limitation, the total light emitting area needs to be divided into 36 or more light emitting regions with 9 or more in series and 4 or more in parallel.
発光面積は、ＩＴＯの電気抵抗による輝度分布によって制限される。例えば、ＩＴＯのシート抵抗が１０Ω／□、電流効率が５０ｃｄ／Ａ、単一の発光パネルが図１に示すような正方形の発光領域の場合、端部（図１の上端及び下端）に対する中央部分の有機エレクトロルミネッセンス層にかかる電圧は、ＩＴＯの抵抗による電圧降下の影響で小さくなる。５０×５０ｍｍの発光面積では発光領域端部と中央で２５ｍｍの距離があり、輝度差は約８３％となり輝度分布は許容幅におさまるが、７５×７５ｍｍの発光面積では３７．５ｍｍとなるため、輝度差は約６８％となり許容されがたい。このことから発光面積の上限は５０×５０ｍｍ程度となる。 The light emitting area is limited by the luminance distribution due to the electrical resistance of ITO. For example, when the sheet resistance of ITO is 10Ω / □, the current efficiency is 50 cd / A, and the single light-emitting panel is a square light-emitting region as shown in FIG. 1, the center portion with respect to the end portions (upper and lower ends in FIG. 1) The voltage applied to the organic electroluminescence layer becomes smaller due to the voltage drop due to the ITO resistance. In the light emission area of 50 × 50 mm, there is a distance of 25 mm at the edge and the center of the light emission region, the luminance difference is about 83% and the luminance distribution is within the allowable range, but the light emission area of 75 × 75 mm is 37.5 mm. The difference in brightness is about 68%, which is not acceptable. Therefore, the upper limit of the light emission area is about 50 × 50 mm.
さらに、好ましくは、直列数と並列数が同じ、または近い数だと配線の長さを短くでき、開口率も大きくできて有利である。例えば直列と並列の数の比が２程度であれば発光領域は行列上に配列し、直列の数は一行に並べることが可能となる。例えば直列数が並列数の４倍であれば、直列接続発光領域を一行に並べると縦横比が大きく異なるし、正方状に配列すれば、配線が複雑になる。 Furthermore, it is preferable that the number of series and the number of parallel are the same or close to each other, which is advantageous because the length of the wiring can be shortened and the aperture ratio can be increased. For example, if the ratio of the number in series and the number in parallel is about 2, the light emitting regions can be arranged on a matrix, and the number in series can be arranged in one line. For example, when the number of series is four times the number of parallel, the aspect ratio is greatly different when the series-connected light emitting regions are arranged in one line, and wiring is complicated when arranged in a square shape.
また、複数の発光領域に分割する場合に、分割数が多すぎると同様に開口率の面から不利である。 In addition, when dividing into a plurality of light emitting regions, if the number of divisions is too large, it is disadvantageous in terms of the aperture ratio.
図２は、本発明の照明装置の一つの発光領域を示す図である。 FIG. 2 is a diagram showing one light emitting region of the illumination device of the present invention.
照明用途の場合、室内照明や、ディスプレイ照明等用途によって発光面積は様々であるが、ユニットとして現在の蛍光灯の明るさ、設置面積等を考えると、有機エレクトロルミネッセンス照明装置の総発光面積は２００ｍｍ×２００ｍｍ〜１０００ｍｍ×１０００ｍｍ程度が必要になる。 In the case of lighting applications, the light emitting area varies depending on the use such as indoor lighting and display lighting. However, considering the current brightness of the fluorescent lamp, installation area, etc. as a unit, the total light emitting area of the organic electroluminescence lighting device is 200 mm. A size of about 200 mm to 1000 mm × 1000 mm is required.
以下、実施例を挙げて本発明を具体的に説明するが、本発明はこれらに限定されるものではない。なお、実施例において「％」の表示を用いるが、特に断りがない限り「質量％」を表す。 EXAMPLES Hereinafter, the present invention will be specifically described with reference to examples, but the present invention is not limited thereto. In addition, although the display of "%" is used in an Example, unless otherwise indicated, "mass%" is represented.
実施例
（実施例１）
ＩＴＯ（１００ｎｍ）付きガラス基板（厚み１．０ｍｍ）を、発光領域が図３の配置となるようにＩＴＯをパターニングした。すなわち、各発光領域が陽極幅と陰極幅で決定され、各発光領域の陽極幅が２５ｍｍになるようにパターニングした。発光領域数は１００で、直列に１０個、並列に１０列、総発光面積が２５０×２５０ｍｍ相当になるように接続されている。
Example (Example 1)
ITO was patterned on a glass substrate (thickness: 1.0 mm) with ITO (100 nm) so that the light emitting region was arranged as shown in FIG. That is, each light emitting region was determined by the anode width and the cathode width, and patterning was performed so that the anode width of each light emitting region was 25 mm. The number of light emitting regions is 100, and 10 are connected in series, 10 are connected in parallel, and are connected so that the total light emitting area is equivalent to 250 × 250 mm.
陽極上に、下記有機エレクトロルミネッセンス層を蒸着により順次積層した。各有機エレクトロルミネッセンス層の構成は以下の通りである。 The following organic electroluminescence layers were sequentially laminated on the anode by vapor deposition. The configuration of each organic electroluminescence layer is as follows.
正孔注入層（ＰＥＤＯＴ：４０ｎｍ）／正孔輸送層（α−ＮＰＤ：２０ｎｍ）／発光層（ＣＢＰ；Ｉｒ（ｐｐｙ）3（６％）：３０ｎｍ）／正孔阻止層（ＢＡｌｑ：１０ｎｍ）／電子輸送層（Ａｌｑ3：３０ｎｍ）／ＬｉＦ（０．５ｎｍ）
なお、ＰＥＤＯＴはＰＥＤＯＴ／ＰＳＳ、Ｂａｙｅｒ社製、Ｂａｙｔｒｏｎ Ｐ Ａｌ ４０８３を表す。
Hole injection layer (PEDOT: 40 nm) / Hole transport layer (α-NPD: 20 nm) / Light emitting layer (CBP; Ir (ppy) 3 (6%): 30 nm) / Hole blocking layer (BAlq: 10 nm) / Electron transport layer (Alq 3 : 30 nm) / LiF (0.5 nm)
PEDOT represents PEDOT / PSS, Baytron P Al 4083, manufactured by Bayer.
有機層を積層した後に陰極としてアルミニウム（１５０ｎｍ）を積層した。陰極は各発光領域に対応する領域が２５ｍｍ幅で、ＩＴＯに対して直交するようにマスク蒸着した。 After laminating the organic layer, aluminum (150 nm) was laminated as a cathode. The cathode was vapor-deposited in a mask so that the area corresponding to each light emitting area was 25 mm wide and orthogonal to ITO.
このようにして作製した照明装置の陽極給電部と陰極給電部の間に４０Ｖの電圧を印加した。並列の各列には２０Ａ／ｍ2の電流密度の電流が流れた。また、各パネルにかかる電圧は４Ｖであった。各パネルは平均約１０００ｃｄ／ｍ2で発光した。各パネル内の輝度分布は、陽極給電部に近い部分が最も明るく、発光領域の中央部が最も暗かったが、その比は９０％以上であった。 A voltage of 40 V was applied between the anode power feeding unit and the cathode power feeding unit of the lighting device thus manufactured. A current with a current density of 20 A / m 2 flowed through each parallel row. The voltage applied to each panel was 4V. Each panel emitted light at an average of about 1000 cd / m 2 . The luminance distribution in each panel was brightest at the portion close to the anode feeding portion and darkest at the center of the light emitting region, but the ratio was 90% or more.
また、このようにして作製したパネルの１枚において、発光領域の一箇所にショート欠陥が発生した（図４）。このとき、ショート欠陥がある発光領域を含む、並列の発光領域群には、４０Ａ／ｍ2の電流が流れ、発光輝度は平均約２０００ｃｄ／ｍ2であった。周りのパネルとの発光輝度の差は視認できるが、大きな不都合が生じないレベルであった。 Further, in one of the panels manufactured in this way, a short defect occurred at one place of the light emitting region (FIG. 4). At this time, a current of 40 A / m 2 flowed through the parallel light emitting region group including the light emitting region having a short defect, and the light emission luminance was about 2000 cd / m 2 on average. Although the difference in light emission luminance from the surrounding panels can be visually recognized, it was at a level where no major inconvenience occurred.
（比較例１）
実施例１と同様にして照明装置を作製した。ただしＩＴＯ、陰極のパターンが異なり、ＩＴＯは各５０ｍｍ幅で発光領域数は２５で、直列に５個、並列に５列、総発光面積が２５０×２５０ｍｍ相当になるように接続されている（図５）。
(Comparative Example 1)
A lighting device was produced in the same manner as in Example 1. However, the ITO and cathode patterns are different. The ITO has a width of 50 mm and the number of light emitting regions is 25, and is connected so that five in series and five in parallel have a total light emitting area equivalent to 250 × 250 mm. 5).
このようにして作製した照明装置の陽極給電部と陰極給電部の間に２０Ｖの電圧を印加した。並列の各列には２０Ａ／ｍ2の電流密度の電流が流れた。各パネル内の輝度分布は、陽極給電部に近い部分が最も明るく、発光領域の中央部が最も暗かったが、その比は約８３％であった。 A voltage of 20 V was applied between the anode feeding part and the cathode feeding part of the lighting device thus manufactured. A current with a current density of 20 A / m 2 flowed through each parallel row. The luminance distribution in each panel was brightest at the portion close to the anode feeding portion and darkest at the center of the light emitting region, and the ratio was about 83%.
また、このようにして作製したパネルの１枚において、発光領域の一箇所にショート欠陥が発生した（図６）。このとき、ショート欠陥がある発光領域を含む、並列の発光領域群には、１００Ａ／ｍ2の電流が流れ、発光輝度は平均約５０００ｃｄ／ｍ2であった。周りのパネルとの発光輝度の差が大きく、輝度ムラが大きく問題が生じた。 Further, in one of the panels manufactured in this manner, a short defect occurred in one place of the light emitting region (FIG. 6). At this time, a current of 100 A / m 2 flowed through the parallel light emitting region group including the light emitting region with a short defect, and the light emission luminance averaged about 5000 cd / m 2 . The difference in emission luminance with the surrounding panels was large, and the luminance unevenness was large, causing problems.
（比較例２）
実施例１と同様にして照明装置を作製した。ただしＩＴＯ、陰極のパターンが異なり、ＩＴＯは各２５ｍｍ幅で発光領域数は４００で、直列に４０個、並列に１０列、総発光面積が５００×５００ｍｍ相当になるように接続されている（図７）。
(Comparative Example 2)
A lighting device was produced in the same manner as in Example 1. However, the ITO and cathode patterns are different, and each ITO is 25 mm wide and has 400 light emitting areas, and 40 are connected in series, 10 are connected in parallel, and the total light emitting area is equivalent to 500 × 500 mm (see FIG. 7).
このようにして作製した照明装置の陽極給電部と陰極給電部の間に１６０Ｖの電圧を印加した。並列の各列には２０Ａ／ｍ2の電流密度の電流が流れた。各パネル内の輝度分布は、陽極給電部に近い部分が最も明るく、発光領域の中央部が最も暗かったが、その比は９０％以上であった。 A voltage of 160 V was applied between the anode feeding portion and the cathode feeding portion of the lighting device thus manufactured. A current with a current density of 20 A / m 2 flowed through each parallel row. The luminance distribution in each panel was brightest at the portion close to the anode feeding portion and darkest at the center of the light emitting region, but the ratio was 90% or more.
また、このようにして作製したパネルの１枚において、発光領域の一箇所にショート欠陥が発生した（図省略）。このとき、ショート欠陥がある発光領域を含む、並列の発光領域群には、４０Ａ／ｍ2の電流が流れ、発光輝度は平均約２０００ｃｄ／ｍ2であった。周りのパネルとの発光輝度の差は視認できるが、大きな不都合が生じないレベルであった。 Further, in one of the panels manufactured in this way, a short defect occurred in one place of the light emitting region (not shown). At this time, a current of 40 A / m 2 flowed through the parallel light emitting region group including the light emitting region having a short defect, and the light emission luminance was about 2000 cd / m 2 on average. Although the difference in light emission luminance from the surrounding panels can be visually recognized, it was at a level where no major inconvenience occurred.
しかし、十分な輝度である１０００ｃｄ／ｍ2程度の発光を得るために１６０Ｖを印加する必要があり、家庭用電源の１００Ｖでは足りなかった。１００Ｖ印加時はほとんど発光しなかった。 However, it was necessary to apply 160 V in order to obtain light emission of about 1000 cd / m 2 with sufficient luminance, and the household power supply of 100 V was not sufficient. Little light was emitted when 100 V was applied.
（実施例２）
実施例１と同様にして照明装置を作製した。ただしＩＴＯ、陰極のパターンが異なり、ＩＴＯは各７５ｍｍ幅で発光領域数は１００で、直列に１０個、並列に１０列、総発光面積が７５０×７５０ｍｍ相当になるように接続されている（図８）。
(Example 2)
A lighting device was produced in the same manner as in Example 1. However, the ITO and cathode patterns are different. The ITO is 75 mm wide and has 100 light emitting areas, and is connected so that the number of light emitting areas is 10 in series, 10 rows in parallel, and the total light emitting area is equivalent to 750 × 750 mm. 8).
このようにして作製した照明装置の陽極給電部と陰極給電部の間に４０Ｖの電圧を印加した。並列の各列には２０Ａ／ｍ2の電流密度の電流が流れた。各パネル内の輝度分布は、陽極給電部に近い部分が最も明るく、発光領域の中央部が最も暗かったが、その比は約６８％となり、許容されがたい輝度分布であった。 A voltage of 40 V was applied between the anode power feeding unit and the cathode power feeding unit of the lighting device thus manufactured. A current with a current density of 20 A / m 2 flowed through each parallel row. The luminance distribution in each panel was brightest in the portion close to the anode feeding portion and darkest in the central portion of the light emitting region, but the ratio was about 68%, which was an unacceptable luminance distribution.
また、このようにして作製したパネルの１枚において、発光領域の一箇所にショート欠陥が発生した（図省略）。このとき、ショート欠陥がある発光領域を含む、並列の発光領域群には、４０Ａ／ｍ2の電流が流れ、発光輝度は平均約２０００ｃｄ／ｍ2であった。周りのパネルとの発光輝度の差は視認できるが、大きな不都合が生じないレベルであった。 Further, in one of the panels manufactured in this way, a short defect occurred in one place of the light emitting region (not shown). At this time, a current of 40 A / m 2 flowed through the parallel light emitting region group including the light emitting region having a short defect, and the light emission luminance was about 2000 cd / m 2 on average. Although the difference in light emission luminance from the surrounding panels can be visually recognized, it was at a level where no major inconvenience occurred.
（実施例３〜７、比較例３、４）
実施例１と同様に照明装置を作製した。ただしＩＴＯ、陰極のパターンが異なり、単発光面積（ＩＴＯ幅）、発光領域数、直列数、並列数、総発光面積が表１になるように接続した。このようにして作製した照明装置の陽極給電部と陰極給電部の間に表１に記載の電圧を印加した。
(Examples 3 to 7, Comparative Examples 3 and 4)
A lighting device was produced in the same manner as in Example 1. However, the patterns of ITO and cathode were different, and the connection was made so that the single light emitting area (ITO width), the number of light emitting regions, the number of series, the number of parallel, and the total light emitting area were as shown in Table 1. The voltages shown in Table 1 were applied between the anode feeding portion and the cathode feeding portion of the lighting device thus manufactured.
（照明装置の評価）
作製した照明装置について、家庭用電源での使用可能性、輝度ムラ及び故障の際の輝度変動の大きさを総合的に判断して◎、○、△、×の４段階で評価した。評価の結果を表１に示す。
(Evaluation of lighting device)
About the produced lighting device, the possibility of use with a household power supply, luminance unevenness, and the magnitude of the luminance fluctuation at the time of failure were comprehensively evaluated and evaluated in four stages of ◎, ○, Δ, and ×. The evaluation results are shown in Table 1.
表より、本発明の照明装置は、家庭用電源が使用可能で、かつ輝度ムラや故障の際の輝度変動を小さく抑えることが可能であることが分かる。 From the table, it can be seen that the lighting device of the present invention can use a household power source, and can suppress luminance unevenness and luminance fluctuation at the time of failure.
１ 発光領域
２ 直列発光領域
３ 総発光領域
４ ショート欠陥パネル
６ 陽極（ＩＴＯ）
７ 有機層
８ 陰極（Ａｌ）
９ 陰極
DESCRIPTION OF SYMBOLS 1
7
9 Cathode
Claims (4)
９≦ｍ≦２５ かつ ４≦ｎ
（式中、ｍ、ｎは整数を表す。） An illumination device for a surface light source composed of organic electroluminescence formed by a plurality of light emitting regions, wherein a light emitting region group is formed by connecting m light emitting regions in series, and the n light emitting region groups are arranged in parallel. A lighting device, wherein m and n satisfy the following formula.
9 ≦ m ≦ 25 and 4 ≦ n
(In the formula, m and n represent integers.)
０．５ｍ≦ｎ≦２ｍ The lighting device according to claim 1, wherein the m and n satisfy the following expression.
0.5m ≦ n ≦ 2m
ｍ×ｎ≦４００ The lighting device according to claim 3, wherein the m and n satisfy the following expression.
m × n ≦ 400
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| JP2007106894A JP2008270248A (en) | 2007-04-16 | 2007-04-16 | Lighting system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011001567A1 (en) * | 2009-07-01 | 2011-01-06 | シャープ株式会社 | Organic el light emitter, organic el lighting device, and process for production of organic el light emitter |
| JPWO2012172879A1 (en) * | 2011-06-14 | 2015-02-23 | コニカミノルタ株式会社 | Organic EL lighting equipment |
| US9088010B2 (en) | 2010-02-10 | 2015-07-21 | Lumiotec Inc. | Organic EL illuminating apparatus |
| JP2016164887A (en) * | 2010-12-24 | 2016-09-08 | 株式会社半導体エネルギー研究所 | Illumination apparatus |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004134359A (en) * | 2002-08-05 | 2004-04-30 | General Electric Co <Ge> | Serially connected oled structure and fabrication method |
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2007
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004134359A (en) * | 2002-08-05 | 2004-04-30 | General Electric Co <Ge> | Serially connected oled structure and fabrication method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011001567A1 (en) * | 2009-07-01 | 2011-01-06 | シャープ株式会社 | Organic el light emitter, organic el lighting device, and process for production of organic el light emitter |
| US9088010B2 (en) | 2010-02-10 | 2015-07-21 | Lumiotec Inc. | Organic EL illuminating apparatus |
| JP5756761B2 (en) * | 2010-02-10 | 2015-07-29 | Ｌｕｍｉｏｔｅｃ株式会社 | Organic EL lighting device |
| JP2016164887A (en) * | 2010-12-24 | 2016-09-08 | 株式会社半導体エネルギー研究所 | Illumination apparatus |
| JPWO2012172879A1 (en) * | 2011-06-14 | 2015-02-23 | コニカミノルタ株式会社 | Organic EL lighting equipment |
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