WO2014006723A1 - Light emitting apparatus - Google Patents
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- WO2014006723A1 WO2014006723A1 PCT/JP2012/067212 JP2012067212W WO2014006723A1 WO 2014006723 A1 WO2014006723 A1 WO 2014006723A1 JP 2012067212 W JP2012067212 W JP 2012067212W WO 2014006723 A1 WO2014006723 A1 WO 2014006723A1
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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
- H10K50/85—Arrangements for extracting light from the devices
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B44/00—Circuit arrangements for operating electroluminescent light sources
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- 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
- H10K59/10—OLED displays
- H10K59/17—Passive-matrix OLED displays
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- 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
- H10K59/10—OLED displays
- H10K59/17—Passive-matrix OLED displays
- H10K59/176—Passive-matrix OLED displays comprising two independent displays, e.g. for emitting information from two major sides of the display
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Abstract
This light emitting apparatus has: a first light emitting section, which has a plurality of first light emitting regions disposed parallel to each other, said first light emitting regions having a long shape, and which has light transmitting characteristics; and a second light emitting section, which overlaps the first light emitting section, and which has a plurality of second light emitting regions disposed parallel to each other in the direction intersecting the first light emitting regions, said second light emitting regions having a long shape.
Description
本発明は、有機ＥＬパネル等の発光パネルを有する発光装置に関する。
The present invention relates to a light emitting device having a light emitting panel such as an organic EL panel.
発光源として有機ＥＬ素子を有する有機ＥＬパネルを用いた発光装置が提案されている。有機ＥＬパネルを用いた発光装置には、面発光で形状に制約がないという特徴があり、そのような特徴はＬＥＤ（発光ダイオード）発光装置等の他の発光装置では得られないので、今後の実用化に向けた更なる開発が期待されている。
A light-emitting device using an organic EL panel having an organic EL element as a light-emitting source has been proposed. A light emitting device using an organic EL panel has a feature that there is no restriction in shape due to surface light emission, and such a feature cannot be obtained in other light emitting devices such as an LED (light emitting diode) light emitting device. Further development for practical application is expected.
一般に、発光装置の発光源としての有機ＥＬパネルは、透明基板上に形成されたＩＴＯ等の透明導電膜からなる陽極と、Ａｌ等の金属からなる陰極と、陽極と陰極との間に挟まれた有機多層構造の有機発光機能層とを有している（特許文献１）。有機発光機能層は有機材料からなり、陽極側から順に例えば、ホール注入・輸送層、発光層、電子輸送層、及び電子注入層の積層からなり、例えば、真空蒸着法又はインクジェット法を用いて積層形成することができる。このような有機ＥＬパネルは、パネル全体で高輝度が得られるようにストライプ状に有機発光機能層を形成している。
In general, an organic EL panel as a light emitting source of a light emitting device is sandwiched between an anode made of a transparent conductive film such as ITO formed on a transparent substrate, a cathode made of a metal such as Al, and the anode and the cathode. And an organic light emitting functional layer having an organic multilayer structure (Patent Document 1). The organic light emitting functional layer is made of an organic material, and is composed of, for example, a hole injection / transport layer, a light emitting layer, an electron transport layer, and an electron injection layer in order from the anode side. Can be formed. In such an organic EL panel, organic light emitting functional layers are formed in stripes so that high luminance can be obtained in the entire panel.
ストライプ状に分布した有機発光機能層を有する有機ＥＬパネルの発光面に現れる明暗や色相による発光パターンは、駆動制御系の構成は簡単であるものの、単一の方向においてのみ輝度、色等の発光特性が変化するだけであるという欠点がある。
The light emission pattern due to light and darkness and hue appearing on the light emitting surface of the organic EL panel having organic light emitting functional layers distributed in stripes, although the configuration of the drive control system is simple, the light emission of luminance, color, etc. only in a single direction There is a drawback that the characteristics only change.
そこで、本発明が解決しようとする課題としては、上記の欠点が一例として挙げられ、駆動制御系の構成は簡単でありかつ複数方向において発光特性が変化する発光パターンを形成し得る発光装置を提供することが本発明の目的である。
Therefore, as a problem to be solved by the present invention, the above-mentioned drawbacks are given as an example, and a light-emitting device capable of forming a light-emitting pattern with a simple drive control system and changing light-emitting characteristics in a plurality of directions is provided. It is an object of the present invention.
請求項１に係る発明の発光装置は、互いに並置された長手形状の複数の第１発光領域を有する透光性の第１発光部と、前記第１発光部に重ね合わされ、前記複数の第１発光領域と交差する方向に互いに並置された長手形状の複数の第２発光領域を有する第２発光部と、を有することを特徴としている。
The light-emitting device according to the first aspect of the present invention includes a light-transmitting first light-emitting unit having a plurality of first light-emitting regions that are arranged in parallel with each other, and the first light-emitting unit. And a second light emitting unit having a plurality of longitudinal second light emitting regions juxtaposed with each other in a direction intersecting with the light emitting region.
以下、本発明の実施例を、図面を参照しつつ詳細に説明する。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
図１及び図２に示された実施例の発光装置中の有機ＥＬパネル１においては、ガラス基板１０上に２つの平板状の発光部１１，１２（第１発光部１１，第２発光部１２）が設けられている。第１及び第２発光部１１，１２の間には透光性樹脂からなる平坦化層１３が挿入されている。第１及び第２発光部１１，１２各々は互いに並置された長手形状の複数の発光領域（ストライプ状の発光領域）を有している。第１発光部１１の各長手形状の発光領域（第１発光領域）と第２発光部１２の各長手形状の発光領域（第２発光領域）とは直交している。各発光領域には有機ＥＬ素子が形成されている。
In the organic EL panel 1 in the light emitting device of the embodiment shown in FIGS. 1 and 2, two flat light emitting portions 11 and 12 (a first light emitting portion 11 and a second light emitting portion 12 are provided on a glass substrate 10. ) Is provided. A planarizing layer 13 made of a translucent resin is inserted between the first and second light emitting units 11 and 12. Each of the first and second light emitting units 11 and 12 has a plurality of longitudinal light emitting regions (striped light emitting regions) juxtaposed with each other. Each longitudinal light emitting region (first light emitting region) of the first light emitting unit 11 and each longitudinal light emitting region (second light emitting region) of the second light emitting unit 12 are orthogonal to each other. An organic EL element is formed in each light emitting region.
第１発光部１１においては、ガラス基板１０上に透明電極２１が第１電極として形成されている。透明電極２１は例えば、スパッタ法により形成され、ＩＴＯ膜からなる。透明電極２１上には長手形状の複数のバンク２２が等間隔で並置されている。バンク２２は透光性（透明を含む）を有する有機絶縁材料からなる。スピンコート法又は印刷法で透明電極２１上に有機絶縁材料を塗布し、乾燥後、フォトリソグラフィ技術によりパターニングを行うことによりバンク２２が形成される。バンク２２は、その長手方向に垂直な方向の断面が台形状であり透明電極２１上において順テーパの側面を有している。
In the first light emitting unit 11, the transparent electrode 21 is formed on the glass substrate 10 as the first electrode. The transparent electrode 21 is formed by sputtering, for example, and is made of an ITO film. On the transparent electrode 21, a plurality of longitudinal banks 22 are juxtaposed at equal intervals. The bank 22 is made of an organic insulating material having translucency (including transparency). A bank 22 is formed by applying an organic insulating material on the transparent electrode 21 by a spin coating method or a printing method, followed by drying and patterning by a photolithography technique. The bank 22 has a trapezoidal cross section in the direction perpendicular to the longitudinal direction, and has a forward tapered side surface on the transparent electrode 21.
隣接するバンク２２間に上記した発光領域が位置している。各発光領域には有機発光構造層として、ホール注入層２３、発光層２４、及び電子注入層２５がその順に形成されている。ホール注入層２３、発光層２４、及び電子注入層２５各々は、その材料を含むインクをインクジェット法等の塗布法を用いて塗布し、塗布後に乾燥処理することにより形成されている。発光層２４については隣接する発光領域で異なる色の発光層が配置されており、赤発光層２４（Ｒ）、緑発光層２４（Ｇ）及び青発光層２４（Ｂ）の順にバンク２２の並置方向に向けて繰り返されている。なお、有機発光構造層は上記した構成に限定されず、ホール注入層２３と発光層２４との間にホール輸送層が形成され、発光層２４と電子注入層２５との間に電子輸送層が形成された構成でも良い。
The light emitting area described above is located between adjacent banks 22. In each light emitting region, a hole injection layer 23, a light emitting layer 24, and an electron injection layer 25 are formed in this order as an organic light emitting structure layer. Each of the hole injecting layer 23, the light emitting layer 24, and the electron injecting layer 25 is formed by applying an ink containing the material using a coating method such as an ink jet method, and drying after the coating. Regarding the light emitting layer 24, light emitting layers of different colors are arranged in adjacent light emitting regions, and the banks 22 are juxtaposed in the order of the red light emitting layer 24 (R), the green light emitting layer 24 (G), and the blue light emitting layer 24 (B). Repeated in the direction. The organic light emitting structure layer is not limited to the configuration described above, a hole transport layer is formed between the hole injection layer 23 and the light emitting layer 24, and an electron transport layer is formed between the light emitting layer 24 and the electron injection layer 25. A formed configuration may be used.
電子注入層２５上には例えば、真空蒸着法にてＡｇが例えば、２０ｎｍの薄膜で真空蒸着され、これにより透光性の金属電極２６が形成されている。金属電極２６は陰極として作用する。金属電極２６は例えば、フォトリソグラフィ技術によりパターニングを行うことにより発光領域毎に設けられている。
On the electron injection layer 25, for example, Ag is vacuum-deposited with a thin film of, for example, 20 nm by a vacuum deposition method, thereby forming a translucent metal electrode 26. The metal electrode 26 acts as a cathode. For example, the metal electrode 26 is provided for each light emitting region by patterning using a photolithography technique.
平坦化層１３は金属電極２６上に形成されており、金属電極２６の上面の凹凸を吸収して平坦な上面を得ている。平坦化層１３の上面はガラス基板１０の透明電極２１の形成面と平行にされている。平坦化層１３の屈折率は例えば、１．８である。
The planarization layer 13 is formed on the metal electrode 26 and absorbs irregularities on the upper surface of the metal electrode 26 to obtain a flat upper surface. The upper surface of the planarizing layer 13 is parallel to the surface on which the transparent electrode 21 of the glass substrate 10 is formed. The refractive index of the planarizing layer 13 is 1.8, for example.
第２発光部１２においては、平坦化層１３上に透明電極３１（第１電極）、長手形状の複数のバンク３２、ホール注入層３３、発光層３４、電子注入層３５、及び金属電極３６（第２電極）が積層されている。透明電極３１、バンク３２、ホール注入層３３、発光層３４、及び電子注入層３５は第１発光部１１の透明電極２１、バンク２２、ホール注入層２３、発光層２４、電子注入層２５と同一であるので、ここでの更なる説明は省略される。電子注入層３５上には例えば、真空蒸着法にてＡｇ又はＡｌが真空蒸着され、これにより金属電極３６が発光領域毎に形成されている。金属電極３６は陰極及び光反射板として作用する。
In the second light emitting unit 12, a transparent electrode 31 (first electrode), a plurality of elongated banks 32, a hole injection layer 33, a light emitting layer 34, an electron injection layer 35 and a metal electrode 36 ( The second electrode) is laminated. The transparent electrode 31, the bank 32, the hole injection layer 33, the light emitting layer 34, and the electron injection layer 35 are the same as the transparent electrode 21, the bank 22, the hole injection layer 23, the light emitting layer 24, and the electron injection layer 25 of the first light emitting unit 11. Thus, further explanation here is omitted. On the electron injection layer 35, for example, Ag or Al is vacuum-deposited by a vacuum vapor deposition method, whereby a metal electrode 36 is formed for each light emitting region. The metal electrode 36 functions as a cathode and a light reflecting plate.
バンク２２の長手方向とバンク３２の長手方向とは直交するので、有機発光構造層である、ホール注入層３３、発光層３４及び電子注入層３５が形成された第２発光部１２の発光領域は第１発光部１１の発光領域と直交する。なお、バンク３２は透光性でなくても良い。
Since the longitudinal direction of the bank 22 and the longitudinal direction of the bank 32 are orthogonal, the light emitting region of the second light emitting unit 12 in which the hole injection layer 33, the light emitting layer 34, and the electron injection layer 35, which are organic light emitting structure layers, are formed. It is orthogonal to the light emitting region of the first light emitting unit 11. The bank 32 may not be translucent.
平坦化層１３を含む第１及び第２発光部１１，１２はガラス基板１０上に設けられた封止部材１５によって封止されている。封止部材１５は金属、樹脂等の封止材料からなり、平坦化層１３を含む第１及び第２発光部１１，１２を覆っている。
The first and second light emitting units 11 and 12 including the planarizing layer 13 are sealed by a sealing member 15 provided on the glass substrate 10. The sealing member 15 is made of a sealing material such as metal or resin, and covers the first and second light emitting units 11 and 12 including the planarizing layer 13.
第１発光部１１の発光層２４が発光すると、その光はホール注入層２３、透明電極２１、そしてガラス基板１０を介して外部に出射される。また、発光層２４で生成した光は電子注入層２５、金属電極２６、平坦化層１３、第２発光部１２の透明電極３１、ホール注入層３３、発光層３４、そして電子注入層３５を経て金属電極３６で反射し、その反射光が金属電極３６を除く第２発光部１２、平坦化層１３、第１発光部１１、そしてガラス基板１０を順に通過して外部に出射される。また、第２発光部１２の発光層３４が発光すると、その光はホール注入層３３、透明電極３１、平坦化層１３、第１発光部１１、そしてガラス基板１０を順に通過して外部に出射される。また、発光層３４で生成した光は電子注入層３５を経て金属電極２６で反射し、その反射光が、金属電極３６を除く第２発光部１２、平坦化層１３、第１発光部１１、そしてガラス基板１０を順に通過して外部に出射される。更に、第２発光部１２の発光層３４から生成された光は第１発光部１１の透光性のバンク２２を通過して外部に出射される場合もある。
When the light emitting layer 24 of the first light emitting unit 11 emits light, the light is emitted to the outside through the hole injection layer 23, the transparent electrode 21, and the glass substrate 10. The light generated in the light emitting layer 24 passes through the electron injection layer 25, the metal electrode 26, the planarization layer 13, the transparent electrode 31 of the second light emitting unit 12, the hole injection layer 33, the light emitting layer 34, and the electron injection layer 35. Reflected by the metal electrode 36, the reflected light passes through the second light emitting unit 12, the planarizing layer 13, the first light emitting unit 11, and the glass substrate 10 except the metal electrode 36 in order, and is emitted to the outside. When the light emitting layer 34 of the second light emitting unit 12 emits light, the light passes through the hole injection layer 33, the transparent electrode 31, the planarizing layer 13, the first light emitting unit 11, and the glass substrate 10 in this order and is emitted to the outside. Is done. The light generated in the light emitting layer 34 is reflected by the metal electrode 26 through the electron injection layer 35, and the reflected light is the second light emitting unit 12, the planarizing layer 13, the first light emitting unit 11, excluding the metal electrode 36, Then, the light passes through the glass substrate 10 and is emitted to the outside. Further, the light generated from the light emitting layer 34 of the second light emitting unit 12 may pass through the translucent bank 22 of the first light emitting unit 11 and be emitted to the outside.
かかる有機ＥＬパネル１を駆動する駆動制御系４０は図３に示すように構成されている。この駆動制御系４０は、交流電源４１の出力電圧を直流電圧に変換するＡＣ－ＤＣコンバータ４２を有している。交流電源４１は例えば、商用電源である。ＡＣ－ＤＣコンバータ４２の出力には２つの駆動回路４３，４４が接続されている。駆動回路４３，４４各々は、図示しないパワートランジスタを発光領域毎に有し、ＡＣ－ＤＣコンバータ４２の出力電圧を用いて発光部１１，１２各々の陽極２１，３１と陰極２６，３７との間に駆動電流を供給する。具体的には、発光部１１，１２各々において全ての発光領域共通の陽極２１，３１各々にはＡＣ－ＤＣコンバータ４２の出力電圧が印加され、一方、陰極２６，３７は発光領域毎に独立して対応するパワートランジスタに接続されており、駆動電流は発光領域毎に制御可能にして供給される。駆動電流の値は発光領域の発光輝度のレベルに対応する。
The drive control system 40 for driving the organic EL panel 1 is configured as shown in FIG. The drive control system 40 includes an AC-DC converter 42 that converts the output voltage of the AC power supply 41 into a DC voltage. The AC power supply 41 is a commercial power supply, for example. Two drive circuits 43 and 44 are connected to the output of the AC-DC converter 42. Each of the drive circuits 43 and 44 has a power transistor (not shown) for each light emitting region, and uses the output voltage of the AC-DC converter 42 to connect between the anodes 21 and 31 and the cathodes 26 and 37 of each of the light emitting units 11 and 12. A drive current is supplied to. Specifically, in each of the light emitting units 11 and 12, the output voltage of the AC-DC converter 42 is applied to each of the anodes 21 and 31 common to all the light emitting regions, while the cathodes 26 and 37 are independent for each light emitting region. Are connected to the corresponding power transistors, and the drive current is supplied in a controllable manner for each light emitting region. The value of the drive current corresponds to the light emission luminance level of the light emitting region.
駆動制御系４０は更に、メモリ４５、制御回路４６、及び操作部４７を有している。メモリ４５には発光部１１，１２の発光パターンについての制御データが予め記憶されている。制御データは第１発光部１１及び第２発光部１２各々の発光領域毎の駆動電流値を表す。制御回路４６はメモリ４５に記憶された制御データに基づいて駆動回路４３，４４各々の駆動動作を制御する。操作部４７はユーザの操作を受け入れ、発光部１１，１２の発光パターンを指定する。
The drive control system 40 further includes a memory 45, a control circuit 46, and an operation unit 47. In the memory 45, control data regarding the light emission patterns of the light emitting units 11 and 12 is stored in advance. The control data represents a drive current value for each light emitting region of each of the first light emitting unit 11 and the second light emitting unit 12. The control circuit 46 controls the drive operation of each of the drive circuits 43 and 44 based on the control data stored in the memory 45. The operation unit 47 accepts a user operation and designates the light emission patterns of the light emitting units 11 and 12.
駆動制御系の駆動によって第１発光部１１では発光層２４が発光して発光領域には例えば、図４(a)に示すようにＲＧＢ（赤緑青）の縦の発光ライン１１Ｒ，１１Ｇ，１１Ｂが生じ、第２発光部１２では発光層３４が発光して発光領域には例えば、図４(b)に示すようにＲＧＢの横の発光ライン１２Ｒ，１２Ｇ，１２Ｂが生じる。有機ＥＬパネル１としては、第１発光部１１と第２発光部とは積層されているので、それら発光ラインは図４(c)に示すように重なり合って示される。
The light emitting layer 24 emits light in the first light emitting unit 11 by driving of the drive control system, and, for example, RGB (red green blue) vertical light emitting lines 11R, 11G, and 11B are formed in the light emitting region as shown in FIG. As a result, the light emitting layer 34 emits light in the second light emitting unit 12 and, for example, RGB horizontal light emitting lines 12R, 12G, and 12B are generated in the light emitting region as shown in FIG. 4B. In the organic EL panel 1, since the first light emitting unit 11 and the second light emitting unit are stacked, the light emitting lines are shown overlapping each other as shown in FIG.
よって、第１発光部１１の縦の発光ライン１１Ｒ，１１Ｇ，１１ＢはＸ軸方向に等間隔で並置され、第２発光部１２の横の発光ライン１２Ｒ，１２Ｇ，１２ＢはＸ軸方向に直交する方向のＹ軸方向に等間隔で並置されているとすることができる。上記の制御データはＸ軸方向の制御データとＹ軸方向の制御データとを含み、制御回路４６はＸ軸方向の制御データに応じて駆動回路４３を制御し、Ｙ軸方向の制御データに応じて駆動回路４４を制御する。Ｘ軸方向の制御データは第１発光部１１の縦の発光ライン各々の駆動電流値を表し、Ｙ軸方向の制御データは第２発光部１２の横の発光ライン各々の駆動電流値を表すので、第１発光部１１の発光ライン（発光領域）１１Ｒ，１１Ｇ，１１Ｂ各々及び第２発光部１２の発光ライン（発光領域）１２Ｒ，１２Ｇ，１２Ｂ各々の輝度を調整することができる。
Therefore, the vertical light emitting lines 11R, 11G, and 11B of the first light emitting unit 11 are juxtaposed at equal intervals in the X axis direction, and the horizontal light emitting lines 12R, 12G, and 12B of the second light emitting unit 12 are orthogonal to the X axis direction. It can be assumed that they are juxtaposed at equal intervals in the Y-axis direction. The control data includes control data in the X-axis direction and control data in the Y-axis direction, and the control circuit 46 controls the drive circuit 43 according to the control data in the X-axis direction, and according to the control data in the Y-axis direction. The drive circuit 44 is controlled. Since the control data in the X-axis direction represents the drive current value of each vertical light-emitting line of the first light-emitting unit 11, the control data in the Y-axis direction represents the drive current value of each horizontal light-emitting line of the second light-emitting unit 12. The brightness of each of the light emitting lines (light emitting regions) 11R, 11G, and 11B of the first light emitting unit 11 and each of the light emitting lines (light emitting regions) 12R, 12G, and 12B of the second light emitting unit 12 can be adjusted.
Ｘ軸方向の制御データ及びＹ軸方向の制御データを操作部４７が選択することにより、Ｘ軸方向の制御データに応じて例えば、図５(a)に示すように、第１発光部１１ではＸ軸の一方向（図５(c)の右方向）で輝度が徐々に上昇するように発光が制御され、Ｙ方向の制御データに応じて図５(b)に示すように、第２発光部１２ではＹ軸の一方向（図５(c)の上方向）で輝度が徐々に低下するように発光が制御されると、ガラス基板１０の光出射面では図５(c)に示すような２次元的な輝度分布（輝度模様）の発光パターンを得ることができる。
When the operation unit 47 selects the control data in the X-axis direction and the control data in the Y-axis direction, for example, as shown in FIG. The light emission is controlled so that the luminance gradually increases in one direction of the X axis (right direction in FIG. 5C), and the second light emission is performed as shown in FIG. 5B according to the control data in the Y direction. When light emission is controlled so that the luminance gradually decreases in one direction of the Y axis (upward direction in FIG. 5C) in the portion 12, the light exit surface of the glass substrate 10 is as shown in FIG. 5C. A light emission pattern having a two-dimensional luminance distribution (luminance pattern) can be obtained.
また、Ｘ軸方向の制御データに応じて例えば、図６(a)に示すように、第１発光部１１ではＸ軸の中央から両方向（図６(c)の左右方向）に輝度が徐々に上昇するように発光が制御され、Ｙ軸方向の制御データに応じて図６(b)に示すように、第２発光部１２ではＹ軸の中央から両方向（図６(c)の上下方向）に輝度が徐々に上昇するように発光が制御されると、ガラス基板１０の光出射面では図６(c)に示すような２次元的な輝度分布の発光パターンを得ることができる。
Further, for example, as shown in FIG. 6A, the luminance of the first light emitting unit 11 gradually increases in both directions (left and right direction in FIG. 6C) from the center of the X axis according to the control data in the X axis direction. As shown in FIG. 6B, the light emission is controlled so as to rise, and as shown in FIG. 6B, in the second light emitting unit 12, both directions from the center of the Y axis (up and down direction in FIG. 6C). If the light emission is controlled so that the luminance gradually increases, a light emission pattern having a two-dimensional luminance distribution as shown in FIG. 6C can be obtained on the light emitting surface of the glass substrate 10.
このように実施例の発光装置においては、駆動制御系の構成は簡単でありかつ複数方向において発光特性が変化する発光パターンを得ることができる。
As described above, in the light emitting device of the embodiment, the configuration of the drive control system is simple, and a light emission pattern whose light emission characteristics change in a plurality of directions can be obtained.
更に、Ｘ軸方向の制御データ及びＹ軸方向の制御データを時間経過に従って変化させるようにしても良い。すなわち、制御回路４６は所定の繰り返しタイミングに同期してＸ軸方向の制御データ及びＹ軸方向の制御データをメモリ４５から各々読み出し、読み出す毎にＸ軸方向の制御データに応じて駆動回路４３を制御し、Ｙ軸方向の制御データに応じて駆動回路４４を制御する。駆動回路４３，４４にＸ軸方向の制御データの変化により例えば、図７(a)に示すように、第１発光部１１のＸ軸方向の輝度が時間ｔ，ｔ＋１，．．．，ｔ＋４の経過に従って変化され、その変化に同期して、Ｙ軸方向の制御データの変化により例えば、図７(b)に示すように、第２発光部１２のＹ軸方向の輝度が時間ｔ，ｔ＋１，．．．，ｔ＋４の経過に従って変化されると、ガラス基板１０の光出射面では時間経過に従って２次元的な輝度分布が反転等の変化となって現れる動的な発光パターンを得ることができる。また、それらの変化が繰り返されるようにしても良い。
Furthermore, the control data in the X-axis direction and the control data in the Y-axis direction may be changed over time. That is, the control circuit 46 reads out control data in the X-axis direction and control data in the Y-axis direction from the memory 45 in synchronization with a predetermined repetition timing, and each time the control circuit 46 reads out the drive circuit 43 according to the control data in the X-axis direction. The drive circuit 44 is controlled according to the control data in the Y-axis direction. For example, as shown in FIG. 7A, the luminance of the first light emitting unit 11 in the X-axis direction is changed to the time t, t + 1,. . . , T + 4, and in synchronism with the change, the brightness of the second light emitting unit 12 in the Y-axis direction changes to the time t as shown in FIG. , T + 1,. . . , T + 4, it is possible to obtain a dynamic light emission pattern in which the two-dimensional luminance distribution appears as a change such as inversion with the passage of time on the light exit surface of the glass substrate 10. Further, these changes may be repeated.
なお、上記した実施例においては、各制御データは発光部１１，１２の輝度を変化させるとして示したが、ＲＧＢの連続する３発光ライン毎に輝度を変化させると白色の明度を変化させることができ、また、ＲＧＢの各発光ラインの輝度を制御データに応じて調整することにより明度と共に色を変化させることができる。
In the above-described embodiment, each control data is shown as changing the luminance of the light emitting units 11 and 12. However, if the luminance is changed every three consecutive RGB light emitting lines, the brightness of white can be changed. In addition, it is possible to change the color together with the brightness by adjusting the luminance of each of the RGB emission lines according to the control data.
また、上記した実施例においては、第１発光部１１と第２発光部１２との間に平坦化層１３が挿入されているが、図８に示すように、第１発光部１１を作製する際に隣接するバンク２２間の凹部にだけ平坦化層１６を形成することにより第１発光部１１の第２発光部１２との結合面の平坦化を行っておき、一方、第２発光部１２をガラス基板（又はフィルム基板）１７上に形成し、第２発光部１２の作製後に第１発光部１１と第２発光部１２とを結合させても良い。
Further, in the above-described embodiment, the planarization layer 13 is inserted between the first light emitting unit 11 and the second light emitting unit 12, but the first light emitting unit 11 is produced as shown in FIG. At this time, the planarization layer 16 is formed only in the recesses between the adjacent banks 22 to planarize the coupling surface of the first light emitting unit 11 with the second light emitting unit 12, while the second light emitting unit 12. May be formed on the glass substrate (or film substrate) 17, and the first light emitting unit 11 and the second light emitting unit 12 may be combined after the second light emitting unit 12 is manufactured.
更に、上記した実施例においては、各発光領域には赤発光層、緑発光層、及び青発光層のいずれか１が形成されているが、赤発光層、緑発光層、及び青発光層の３発光領域を共通に駆動して白発光の発光領域としても良い。
Further, in each of the above-described embodiments, each of the light emitting regions is formed with any one of a red light emitting layer, a green light emitting layer, and a blue light emitting layer. The three light emitting areas may be driven in common to form a white light emitting area.
また、上記した実施例においては、ガラス基板１０側から光を外部に出射するボトムエミッションタイプの有機ＥＬパネルを示したが、本発明は第２発光部１２の金属電極３６を透光性の陰極電極とすることにより第２発光部１２を透過型発光素子とし、またガラス基板１０側に光反射層を設けてトップエミッションタイプの有機ＥＬパネルとして形成しても良い。
In the above-described embodiment, a bottom emission type organic EL panel that emits light from the glass substrate 10 side is shown. However, in the present invention, the metal electrode 36 of the second light emitting unit 12 is used as a translucent cathode. By forming an electrode, the second light emitting unit 12 may be a transmissive light emitting element, and a light reflection layer may be provided on the glass substrate 10 side to form a top emission type organic EL panel.
また、上記した実施例においては、予め用意された制御データを用いて第１発光部１１及び第２発光部１２を駆動しているが、第１発光部１１及び第２発光部１２の各発光領域の輝度をユーザ操作に応じて設定するように操作部４７に輝度設定用の操作子を設けてその操作子による設定輝度に応じて第１発光部１１及び第２発光部１２を駆動して各発光領域の輝度を調整しても良い。
In the above-described embodiment, the first light emitting unit 11 and the second light emitting unit 12 are driven using control data prepared in advance, but each light emission of the first light emitting unit 11 and the second light emitting unit 12 is performed. A luminance setting operation element is provided in the operation unit 47 so as to set the luminance of the area according to the user operation, and the first light emitting unit 11 and the second light emitting unit 12 are driven according to the set luminance by the operation element. You may adjust the brightness | luminance of each light emission area | region.
上記した実施例は、第１発光部１１及び第２発光部１２の各発光領域に有機ＥＬ素子を用いた発光装置であるが、本発明は第１発光部及び第２発光部の各発光領域に有機ＥＬ素子以外のＬＥＤ（発光ダイオード）等の発光素子を用いた発光装置であっても良い。
The above-described embodiment is a light emitting device using an organic EL element in each light emitting region of the first light emitting unit 11 and the second light emitting unit 12, but the present invention is each light emitting region of the first light emitting unit and the second light emitting unit. Alternatively, a light emitting device using a light emitting element such as an LED (light emitting diode) other than the organic EL element may be used.
また、上記した実施例においては、第１発光部１１及び第２発光部１２の各発光領域は等間隔で並置されているが、本発明はこれに限定されず、例えば、間隔が疎な部分と密な部分とが組み合わさっても良い。更に、発光領域は直線的に限らず曲がっていても良い。
Further, in the above-described embodiments, the light emitting regions of the first light emitting unit 11 and the second light emitting unit 12 are juxtaposed at equal intervals. However, the present invention is not limited to this, for example, a portion with a small interval. And dense parts may be combined. Furthermore, the light emitting area is not limited to a straight line, and may be bent.
更に、本発明は第１発光部及び第２発光部の他に、平板状の第３発光部をそれらに第１発光部及び第２発光部に重ね合わせても良い。第３発光部は第１発光部の複数の第１発光領域及び第２発光部の複数の第２発光領域と交差する方向に互いに並置された長手形状の複数の第３発光領域を有する。また、上記した実施例では、第１発光部１１の各長手形状の発光領域と第２発光部１２の各長手形状の発光領域とは直交しているが、交差していれば良い。
Furthermore, in the present invention, in addition to the first light emitting unit and the second light emitting unit, a plate-like third light emitting unit may be superimposed on the first light emitting unit and the second light emitting unit. The third light emitting unit has a plurality of longitudinal third light emitting regions juxtaposed in a direction intersecting with the plurality of first light emitting regions of the first light emitting unit and the plurality of second light emitting regions of the second light emitting unit. Further, in the above-described embodiments, the long light emitting areas of the first light emitting section 11 and the long light emitting areas of the second light emitting section 12 are orthogonal to each other.
なお、上記した実施例では陽極である透明電極のバスラインの記載を省略したが、バスラインはバンクの内部に透明電極に接するように配置されても良い。
In the above-described embodiments, the description of the bus line of the transparent electrode that is an anode is omitted, but the bus line may be arranged inside the bank so as to be in contact with the transparent electrode.
本発明の発光装置は有機ＥＬ照明装置やイルミネーション装置の光源や有機ＥＬディスプレイに利用することができる。
The light-emitting device of the present invention can be used for an organic EL lighting device, a light source of an illumination device, and an organic EL display.
１ 有機ＥＬパネル
１０，１７ ガラス基板
１１ 第１発光部
１２ 第２発光部
１３，１６ 平坦化層
２１，３１ 透明電極
２２，３２ バンク
２３，３３ ホール注入層２４
２４，３４ 発光層
２５，３５ 電子注入層
２６，３６ 金属電極
４０ 駆動制御系 DESCRIPTION OF SYMBOLS 1 Organic electroluminescent panel 10, 17 Glass substrate 11 1st light emission part 12 2nd light emission part 13, 16 Flattening layer 21, 31 Transparent electrode 22, 32 Bank 23, 33 Hole injection layer 24
24, 34 Light emitting layer 25, 35 Electron injection layer 26, 36 Metal electrode 40 Drive control system
１０，１７ ガラス基板
１１ 第１発光部
１２ 第２発光部
１３，１６ 平坦化層
２１，３１ 透明電極
２２，３２ バンク
２３，３３ ホール注入層２４
２４，３４ 発光層
２５，３５ 電子注入層
２６，３６ 金属電極
４０ 駆動制御系 DESCRIPTION OF SYMBOLS 1
24, 34
Claims (8)
- 互いに並置された長手形状の複数の第１発光領域を有する透光性の第１発光部と、
前記第１発光部に重ね合わされ、前記複数の第１発光領域と交差する方向に互いに並置された長手形状の複数の第２発光領域を有する第２発光部と、を有することを特徴とする発光装置。 A translucent first light emitting section having a plurality of longitudinal first light emitting regions juxtaposed with each other;
A second light-emitting unit that has a plurality of longitudinal second light-emitting regions superimposed on the first light-emitting unit and juxtaposed with each other in a direction intersecting the plurality of first light-emitting regions. apparatus. - 前記第１発光部及び前記第２発光部を個別に発光駆動する駆動制御系を有することを特徴とする請求項１記載の発光装置。 The light-emitting device according to claim 1, further comprising a drive control system that individually drives the first light-emitting unit and the second light-emitting unit to emit light.
- 前記駆動制御系は前記複数の第１発光領域各々の輝度及び色の少なくとも一方を個別に調整する第１駆動回路と、前記複数の第２発光領域各々の輝度及び色の少なくとも一方を個別に調整する第２駆動回路と、を有することを特徴とする請求項２記載の発光装置。 The drive control system individually adjusts at least one of luminance and color of each of the plurality of first light emitting regions, and individually adjusts at least one of luminance and color of each of the plurality of second light emitting regions. The light-emitting device according to claim 2, further comprising:
- 前記駆動制御系は前記第１駆動回路及び前記第２駆動回路を制御データに応じて個別に制御する制御回路を有し、前記制御データは前記複数の第１発光領域各々及び前記複数の第２発光領域各々の輝度及び色の少なくとも一方に対応した値を含むことを特徴とする請求項３記載の発光装置。 The drive control system includes a control circuit that individually controls the first drive circuit and the second drive circuit according to control data, and the control data includes the plurality of first light emitting regions and the plurality of second second circuits. 4. The light emitting device according to claim 3, comprising a value corresponding to at least one of luminance and color of each light emitting region.
- 前記第２発光部は前記第１発光部及び前記第２発光部各々が発した光を前記第１発光部に向けて反射する光反射層を有することを特徴とする請求項２記載の発光装置。 3. The light emitting device according to claim 2, wherein the second light emitting unit includes a light reflecting layer that reflects light emitted from each of the first light emitting unit and the second light emitting unit toward the first light emitting unit. .
- 前記第１発光部は前記複数の第１発光領域各々に有機ＥＬ素子を有し、前記第２発光部は前記複数の第２発光領域各々に有機ＥＬ素子を有することを特徴とする請求項５記載の発光装置。 6. The first light emitting unit includes an organic EL element in each of the plurality of first light emitting regions, and the second light emitting unit includes an organic EL element in each of the plurality of second light emitting regions. The light-emitting device of description.
- 前記第１発光部は前記複数の第１発光領域各々を定める透光性の複数のバンクを有することを特徴とする請求項６記載の発光装置。 The light emitting device according to claim 6, wherein the first light emitting unit has a plurality of translucent banks that define the plurality of first light emitting regions.
- 前記第１発光部及び前記第２発光部に重ね合わされ、前記複数の第１発光領域及び前記複数の第２発光領域と交差する方向に互いに並置された長手形状の複数の第３発光領域を有する第３発光部を更に有することを特徴とする請求項１記載の発光装置。 A plurality of third light emitting regions having a longitudinal shape that are superimposed on the first light emitting unit and the second light emitting unit and juxtaposed with each other in a direction intersecting the plurality of first light emitting regions and the plurality of second light emitting regions. The light emitting device according to claim 1, further comprising a third light emitting unit.
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| JP2008277462A (en) * | 2007-04-27 | 2008-11-13 | Sony Corp | Illumination device, and liquid display device |
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| JP2005203352A (en) * | 2004-01-15 | 2005-07-28 | Chi Mei Optoelectronics Corp | El display device and its manufacturing method |
| JP2006302626A (en) * | 2005-04-19 | 2006-11-02 | Semiconductor Energy Lab Co Ltd | Display device |
| JP2008277462A (en) * | 2007-04-27 | 2008-11-13 | Sony Corp | Illumination device, and liquid display device |
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