JP2001203077A - Driving method of organic electroluminescent element and driving device - Google Patents
Driving method of organic electroluminescent element and driving deviceInfo
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- JP2001203077A JP2001203077A JP2000008607A JP2000008607A JP2001203077A JP 2001203077 A JP2001203077 A JP 2001203077A JP 2000008607 A JP2000008607 A JP 2000008607A JP 2000008607 A JP2000008607 A JP 2000008607A JP 2001203077 A JP2001203077 A JP 2001203077A
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- 238000000034 method Methods 0.000 title claims description 22
- 239000012044 organic layer Substances 0.000 claims description 8
- 230000006866 deterioration Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 6
- 230000006378 damage Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 4
- 239000002346 layers by function Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- -1 and the like Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
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Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、陽極と、電流の注
入によって発光する有機化合物層（有機層）と、陰極と
を順次積層した有機ＥＬ素子を駆動する有機ＥＬ素子の
駆動方法および駆動装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and an apparatus for driving an organic EL element for driving an organic EL element in which an anode, an organic compound layer (organic layer) which emits light by current injection, and a cathode are sequentially laminated. About.
【０００２】[0002]
【従来の技術】従来、この種の有機ＥＬ素子の発光原理
は、有機層に対して陰極から電子を注入するとともに陽
極から正孔を注入することにより有機層中の発光体が高
いエネルギ順位に励起され、これが基底状態に戻るとき
に発光現象を呈すというものである。しかし、この有機
ＥＬ素子では有機層に電荷が蓄積するなどして発光寿命
が短くなるという問題がある。2. Description of the Related Art Heretofore, the light emission principle of this type of organic EL device is such that a luminous body in an organic layer has a high energy order by injecting electrons from the cathode and holes from the anode into the organic layer. It is excited and emits light when it returns to the ground state. However, this organic EL device has a problem that the light emission lifetime is shortened due to accumulation of electric charge in the organic layer.
【０００３】そこで、例えば、特開平１０−１７２７６
０号公報、特開平１１−８０６４号公報等に開示されて
いるように、陽極と陰極に印加する駆動電圧として、発
光時の駆動電圧と、この電圧と逆極性となる逆バイアス
電圧を交互に印加するようにしている。For example, Japanese Patent Application Laid-Open No. 10-17276 discloses
No. 0, JP-A-11-8064, etc., as a drive voltage applied to the anode and the cathode, a drive voltage at the time of light emission and a reverse bias voltage having a polarity opposite to this voltage are alternately applied. It is applied.
【０００４】[0004]
【発明が解決しようとする課題】しかし、上記の従来の
技術にあっては、駆動電圧と逆バイアス電圧を交互に印
加するために、インバータ等のパルス発生器や、２つの
定電圧源とこの出力を切り換え制御するスイッチ回路お
よび制御回路を必要としており、回路構成が複雑になる
という問題があった。However, in the above-mentioned conventional technique, a pulse generator such as an inverter, two constant voltage sources and a pulse generator such as an inverter are required to alternately apply a drive voltage and a reverse bias voltage. A switch circuit and a control circuit for switching and controlling the output are required, and there has been a problem that the circuit configuration is complicated.
【０００５】本発明は上記の問題点に鑑みてなされたも
のであり、簡単な構成で、有機ＥＬ素子の発光寿命を延
ばすことを課題とする。The present invention has been made in view of the above problems, and has as its object to extend the emission life of an organic EL element with a simple configuration.
【０００６】[0006]
【課題を解決するための手段】請求項１の有機ＥＬ素子
の駆動方法は、陽極と有機層と陰極が順次積層された有
機ＥＬ素子を駆動する有機ＥＬ素子の駆動方法におい
て、交流電源を受動素子により構成された電圧降下装置
にて降下し、この降下交流電圧を前記陽極と陰極との間
に印加するようにしたことを特徴とする。According to a first aspect of the present invention, there is provided a method of driving an organic EL element in which an anode, an organic layer, and a cathode are sequentially stacked. The voltage is dropped by a voltage drop device composed of elements, and the dropped AC voltage is applied between the anode and the cathode.
【０００７】請求項２の有機ＥＬ素子の駆動方法は、請
求項１の構成を備え、前記交流電源が商用交流電源であ
ることを特徴とする。According to a second aspect of the present invention, there is provided a method of driving an organic EL device, comprising the configuration of the first aspect, wherein the AC power supply is a commercial AC power supply.
【０００８】請求項３の有機ＥＬ素子の駆動方法は、請
求項１の構成を備え、前記電圧降下装置をトランスによ
り構成し、該トランスより前記降下交流電圧を陽極と陰
極との間に印加するようにしたことを特徴とする。According to a third aspect of the present invention, there is provided a method of driving an organic EL element, comprising the configuration of the first aspect, wherein the voltage drop device is constituted by a transformer, and the transformer applies the dropped AC voltage between the anode and the cathode. It is characterized by doing so.
【０００９】請求項４の有機ＥＬ素子の駆動方法は、請
求項１の構成を備え、前記降下交流電圧を前記陽極と陰
極との間に印加するに際して電流制限を施したことを特
徴とする。According to a fourth aspect of the present invention, there is provided a method for driving an organic EL device, comprising the configuration of the first aspect, wherein a current is limited when the falling AC voltage is applied between the anode and the cathode.
【００１０】請求項５の有機ＥＬ素子の駆動方法は、請
求項１の構成を備え、前記降下交流電圧を前記陽極と陰
極との間に印加するに際して正負の印加電圧を異ならし
めるようにしたことを特徴とする。According to a fifth aspect of the present invention, there is provided a driving method of an organic EL device, wherein the positive and negative applied voltages are made different when the falling AC voltage is applied between the anode and the cathode. It is characterized by.
【００１１】請求項６の有機ＥＬ素子の駆動方法は、請
求項１の構成を備え、少なくとも２つの有機ＥＬ素子を
逆並列接続し、前記有機ＥＬ素子の前記陽極と陰極との
間に前記降下交流電圧を印加するようにしたことを特徴
とする。In a sixth aspect of the present invention, there is provided a driving method of the organic EL element, comprising the configuration of the first aspect, wherein at least two organic EL elements are connected in anti-parallel, and the lowering is performed between the anode and the cathode of the organic EL element. An AC voltage is applied.
【００１２】請求項７の有機ＥＬ素子の駆動装置は、陽
極と有機層と陰極が順次積層された有機ＥＬ素子を駆動
する有機ＥＬ素子の駆動装置において、受動素子により
構成された交流電源を電圧降下する電圧降下装置を備
え、前記電圧降下装置にて降下した降下交流電圧を前記
陽極と陰極との間に印加するようにしたことを特徴とす
る。According to a seventh aspect of the present invention, in the organic EL device driving device for driving an organic EL device in which an anode, an organic layer, and a cathode are sequentially laminated, an AC power supply constituted by a passive element is supplied with a voltage. A voltage drop device for dropping is provided, and the alternating voltage dropped by the voltage drop device is applied between the anode and the cathode.
【００１３】請求項８の有機ＥＬ素子の駆動装置は、請
求項７の構成を備え、前記交流電源が商用交流電源であ
ることを特徴とする。According to a eighth aspect of the present invention, there is provided a driving device for an organic EL device having the configuration of the seventh aspect, wherein the AC power supply is a commercial AC power supply.
【００１４】請求項９の有機ＥＬ素子の駆動装置は、請
求項７の構成を備え、前記電圧降下装置はトランスによ
り構成されていることを特徴とする。According to a ninth aspect of the present invention, there is provided a driving device for an organic EL device having the configuration of the seventh aspect, wherein the voltage drop device is constituted by a transformer.
【００１５】請求項１０の有機ＥＬ素子の駆動装置は、
請求項７の構成に加えて電流制限装置を備え、該電流制
限装置により前記降下交流電圧を前記陽極と陰極との間
に印加したとき、前記有機ＥＬ素子に流れる駆動電流を
制限するようにしたことを特徴とする。A driving device for an organic EL element according to claim 10 is
In addition to the configuration of claim 7, a current limiting device is provided, and when the falling AC voltage is applied between the anode and the cathode by the current limiting device, a drive current flowing through the organic EL element is limited. It is characterized by the following.
【００１６】請求項１１の有機ＥＬ素子の駆動装置は、
請求項７の構成に加えて印加電圧設定装置を備え、該印
加電圧設定装置により前記降下交流電圧を前記陽極と陰
極との間に印加したとき、正負の印加電圧を異ならしめ
るようにしたことを特徴とする。A driving device for an organic EL device according to claim 11 is
In addition to the configuration according to claim 7, further comprising an applied voltage setting device, wherein when the applied AC voltage is applied between the anode and the cathode by the applied voltage setting device, positive and negative applied voltages are made different. Features.
【００１７】請求項１２の有機ＥＬ素子の駆動装置は、
請求項７の構成を備え、少なくとも２つの有機ＥＬ素子
を逆並列接続し、前記有機ＥＬ素子の前記陽極と陰極と
の間に前記降下交流電圧を印加するようにしたことを特
徴とする。A driving device for an organic EL element according to claim 12 is
According to a seventh aspect of the present invention, at least two organic EL elements are connected in anti-parallel, and the falling AC voltage is applied between the anode and the cathode of the organic EL element.
【００１８】[0018]
【発明の実施の形態】図４は本発明の実施形態に係る有
機ＥＬ素子の一例を示す断面図であり、この有機ＥＬ素
子は、透明電極２１が形成されたガラス板などの透明基
板２２上に電子輸送層、発光層、正孔輸送層などからな
る有機機能層２３、および金属電極２４が積層されたも
のである。そして、透明電極２１にプラス、金属電極２
４にマイナスの電圧を加えることにより、有機機能層２
３が発光する。このような極性の印加電圧に対して、有
機ＥＬ素子は順方向となる。なお、以下の各実施形態に
おける有機ＥＬ素子２０、２０−１、２０−２は上記の
有機ＥＬ素子である。FIG. 4 is a sectional view showing an example of an organic EL device according to an embodiment of the present invention. This organic EL device is formed on a transparent substrate 22 such as a glass plate on which a transparent electrode 21 is formed. An organic functional layer 23 composed of an electron transporting layer, a light emitting layer, a hole transporting layer, and the like, and a metal electrode 24 are laminated on each other. Then, plus the transparent electrode 21 and the metal electrode 2
4 by applying a negative voltage to the organic functional layer 2
3 emits light. The organic EL element has a forward direction with respect to the applied voltage having such a polarity. Note that the organic EL elements 20, 20-1, and 20-2 in the following embodiments are the above-described organic EL elements.
【００１９】図１は本発明の第１実施形態の有機ＥＬ素
子の駆動装置を示す回路図であり、この第１実施形態の
駆動装置は、電圧降下装置としての変圧器（トランス）
１と電流制限装置としての電流制限用の抵抗２で構成さ
れている。変圧器１はその一次側をＡＣ１００Ｖの商用
交流電源１０に接続され、変圧器１の二次側に対して、
抵抗２と有機ＥＬ素子２０が直列に接続されている。変
圧器１は、一次側のＡＣ１００Ｖの入力に対して、二次
側の出力電圧が６〜１０Ｖ程度の所定の電圧値となるよ
うに構成されている。FIG. 1 is a circuit diagram showing a driving device of an organic EL device according to a first embodiment of the present invention. The driving device according to the first embodiment is a transformer (transformer) as a voltage drop device.
1 and a current limiting resistor 2 as a current limiting device. The transformer 1 has a primary side connected to a commercial AC power supply 10 of AC100V.
The resistor 2 and the organic EL element 20 are connected in series. The transformer 1 is configured such that the output voltage on the secondary side has a predetermined voltage value of about 6 to 10 V with respect to the input of AC 100 V on the primary side.
【００２０】以上の構成により、商用交流電源１０の交
流が変圧器１により電圧降下され、６〜１０Ｖ程度の所
定の電圧が抵抗２および有機ＥＬ素子２０に印加され
る。これにより、有機ＥＬ素子２０には、周期的に降下
交流電源の負電圧が逆バイアス電圧として印加される。
したがって、有機ＥＬ素子の発光寿命が長くなる。な
お、抵抗２の抵抗値Ｒは小さな値であり、この抵抗２に
よる電流制限機能を備えた定電圧駆動となっている。た
だし、抵抗２の抵抗値Ｒを大きくすれば定電流駆動とな
る。With the above configuration, the AC of the commercial AC power supply 10 is dropped by the transformer 1, and a predetermined voltage of about 6 to 10 V is applied to the resistor 2 and the organic EL element 20. Thereby, the negative voltage of the alternating current power supply is periodically applied to the organic EL element 20 as a reverse bias voltage.
Therefore, the emission life of the organic EL element is prolonged. Note that the resistance value R of the resistor 2 is a small value, and a constant voltage drive having a current limiting function by the resistor 2 is performed. However, if the resistance value R of the resistor 2 is increased, a constant current drive is performed.
【００２１】このように、第１実施形態では変圧器１お
よび抵抗２という受動素子で構成されており、また、有
機ＥＬ素子２０を接続する際の極性はどちらでもよく、
簡単な回路構成となっている。また、有機ＥＬ素子２０
が大面積の照明を行うようなものの場合、特に低コスト
とすることができる。また、抵抗２により電流が制限さ
れるので、有機ＥＬ素子２０の劣化や破壊を抑えること
ができる。As described above, in the first embodiment, the passive element such as the transformer 1 and the resistor 2 is used, and the polarity when connecting the organic EL element 20 may be either.
It has a simple circuit configuration. In addition, the organic EL element 20
However, in the case where a large area illumination is performed, the cost can be particularly reduced. In addition, since the current is limited by the resistor 2, the deterioration and destruction of the organic EL element 20 can be suppressed.
【００２２】図２は本発明の第２実施形態の有機ＥＬ素
子の駆動装置を示す回路図であり、この第２実施形態の
駆動装置は、変圧器１と整流ダイオード３−１，３−２
および抵抗４−１，４−２で構成されている。変圧器１
は一次側がＡＣ１００Ｖの商用交流電源１０に接続され
ており、この変圧器１もＡＣ１００Ｖの入力に対して出
力電圧が６〜１０Ｖ程度の所定の電圧値となるように構
成されている。FIG. 2 is a circuit diagram showing a driving device for an organic EL device according to a second embodiment of the present invention. The driving device according to the second embodiment comprises a transformer 1 and rectifier diodes 3-1 and 3-2.
And resistors 4-1 and 4-2. Transformer 1
The primary side is connected to a commercial AC power supply 10 of AC100V, and the transformer 1 is also configured such that an output voltage thereof becomes a predetermined voltage value of about 6 to 10V with respect to an input of AC100V.
【００２３】また、整流ダイオード３−１と抵抗４−１
とが直接接続されたものと、整流ダイオード３−２と抵
抗４−２とが直列接続されたものとが、整流ダイオード
３−１と整流ダイオード３−２の特性が逆方向となるよ
うに、並列接続されている。そして、この並列接続され
た回路と有機ＥＬ素子２０とが、変圧器１の二次側に対
して直列に接続されている。なお、有機ＥＬ素子２０は
図の矢印方向が順方向（発光時に電流が流れる方向）で
ある。The rectifier diode 3-1 and the resistor 4-1
Are directly connected, and the rectifier diode 3-2 and the resistor 4-2 are connected in series, so that the characteristics of the rectifier diode 3-1 and the rectifier diode 3-2 are opposite. They are connected in parallel. The circuit and the organic EL element 20 connected in parallel are connected in series to the secondary side of the transformer 1. In the organic EL element 20, the direction of the arrow in the figure is the forward direction (the direction in which current flows during light emission).
【００２４】ここで、整流ダイオード３−１、抵抗４−
１、整流ダイオード３−２、抵抗４−２は、印加電圧設
定装置を構しており、整流ダイオード３−１と整流ダイ
オード３−２抵抗４−１の抵抗値Ｒ１と抵抗４−２の抵
抗値Ｒ２とは値が異なり、Ｒ１＞Ｒ２に設定されてい
る。これにより、有機ＥＬ素子２０に対する順方向電圧
（正電圧）の絶対値（大きさ）が逆方向電圧（負電圧）
の絶対値より大きくなっている。すなわち、逆バイアス
電圧が発光時の電圧より低く設定されており、逆バイア
ス電圧の印加による有機ＥＬ素子２０の劣化や破壊を抑
えることができる。Here, the rectifier diode 3-1 and the resistor 4-
1, the rectifier diode 3-2 and the resistor 4-2 constitute an applied voltage setting device, and include a resistance value R1 of the rectifier diode 3-1 and the resistor 4-1 and a resistance value of the resistor 4-2. The value is different from the value R2, and R1> R2 is set. Thereby, the absolute value (magnitude) of the forward voltage (positive voltage) with respect to the organic EL element 20 becomes the reverse voltage (negative voltage).
Is greater than the absolute value of That is, the reverse bias voltage is set lower than the voltage at the time of light emission, and the deterioration and destruction of the organic EL element 20 due to the application of the reverse bias voltage can be suppressed.
【００２５】このように、第２実施形態の駆動装置も、
変圧器１、整流ダイオード３−１，３−２および抵抗４
−１，４−２という受動素子で構成されており、簡単な
回路構成となっている。As described above, the driving device of the second embodiment also
Transformer 1, rectifier diodes 3-1 and 3-2, and resistor 4
-1, 4-2, and has a simple circuit configuration.
【００２６】図３は本発明の第３実施形態の有機ＥＬ素
子の駆動装置を示す回路図であり、この第３実施形態の
駆動装置は変圧器１と抵抗５で構成されている。変圧器
１は一次側がＡＣ１００Ｖの商用交流電源１０に接続さ
れており、この変圧器１もＡＣ１００Ｖの入力に対して
出力電圧が６〜１０Ｖ程度の所定の電圧値となるように
構成されている。FIG. 3 is a circuit diagram showing a driving device for an organic EL device according to a third embodiment of the present invention. The driving device according to the third embodiment includes a transformer 1 and a resistor 5. The primary side of the transformer 1 is connected to a commercial AC power supply 10 of AC100V, and the transformer 1 is also configured such that an output voltage thereof becomes a predetermined voltage value of about 6 to 10V with respect to an input of AC100V.
【００２７】この第３実施形態の駆動回路は２つの有機
ＥＬ素子２０−１，２０−２を駆動するものでり、有機
ＥＬ素子２０−１と有機ＥＬ素子２０−２とは特性が逆
方向となるようにして逆並列に接続されている。そし
て、有機ＥＬ素子２０−１，２０−２と抵抗５とが変圧
器１の二次側に対して直列に接続されている。The drive circuit of the third embodiment drives two organic EL elements 20-1 and 20-2, and the characteristics of the organic EL element 20-1 and the organic EL element 20-2 are opposite. And connected in antiparallel. The organic EL elements 20-1 and 20-2 and the resistor 5 are connected in series to the secondary side of the transformer 1.
【００２８】有機ＥＬ素子２０−１，２０−２の電気的
特性はダイオードと類似した特性を持っており、このダ
イオードと類似した特性を利用して、有機ＥＬ素子２０
−１，２０−２印加される逆バイアス電圧を抑えてい
る。The electric characteristics of the organic EL elements 20-1 and 20-2 have characteristics similar to those of the diode.
-1, 20-2 The reverse bias voltage applied is suppressed.
【００２９】この第３実施形態でも、変圧器１および抵
抗５という受動素子で構成されており、また、有機ＥＬ
素子２０−１，２０−２を接続する際の極性はどちらで
もよく、簡単な回路構成となっている。In the third embodiment, the passive element such as the transformer 1 and the resistor 5 is also used.
The polarity when connecting the elements 20-1 and 20-2 may be either, and it has a simple circuit configuration.
【００３０】上記第３実施形態では２つの有機ＥＬ素子
２０−１，２０−２を接続しているが、３つ以上の有機
ＥＬ素子を接続してもよい。In the third embodiment, two organic EL elements 20-1 and 20-2 are connected, but three or more organic EL elements may be connected.
【００３１】なお、以上の各実施形態の駆動装置によ
り、本発明における有機ＥＬ素子の駆動方法が実施され
ていることは明らかである。It is apparent that the driving method of the organic EL element of the present invention is implemented by the driving devices of the above embodiments.
【００３２】[0032]
【発明の効果】以上説明したように、本発明の請求項１
の有機ＥＬ素子の駆動方法または請求項７の有機ＥＬ素
子の駆動装置によれば、交流電源を受動素子により構成
された電圧降下装置にて降下し、この降下交流電圧を前
記陽極と陰極との間に印加するようにしたので、簡単な
構成で、有機ＥＬ素子の発光寿命を延ばすことができ
る。As described above, according to the first aspect of the present invention,
According to the method for driving an organic EL element of the present invention or the driving apparatus for an organic EL element according to claim 7, the AC power supply is dropped by a voltage dropping device constituted by a passive element, and this dropped AC voltage is reduced between the anode and the cathode. Since the voltage is applied during the period, the light emission life of the organic EL element can be extended with a simple configuration.
【００３３】また、請求項２の有機ＥＬ素子の駆動方法
または請求項８の有機ＥＬ素子の駆動装置によれば、請
求項１または請求項７と同様な効果が得られるととも
に、交流電源として商用交流電源を用いるのでさらに構
成が簡単になる。According to the driving method of the organic EL element of the second aspect or the driving device of the organic EL element of the eighth aspect, the same effects as those of the first or seventh aspect can be obtained, and the commercial power supply can be used as an AC power supply. Since an AC power supply is used, the configuration is further simplified.
【００３４】また、請求項３の有機ＥＬ素子の駆動方法
または請求項９の有機ＥＬ素子の駆動装置によれば、請
求項１または請求項７と同様な効果が得られるととも
に、電圧降下装置としてトランスを用いるのでさらに構
成が簡単になる。According to the organic EL element driving method of the third aspect or the organic EL element driving apparatus of the ninth aspect, the same effect as that of the first or seventh aspect can be obtained, and the voltage drop device can be used. Since a transformer is used, the configuration is further simplified.
【００３５】また、請求項４の有機ＥＬ素子の駆動方法
または請求項１０の有機ＥＬ素子の駆動装置によれば、
請求項１または請求項７と同様な効果が得られるととも
に、降下交流電圧を陽極と陰極との間に印加するに際し
て電流制限を施すようにしたので、有機ＥＬ素子の劣化
や破壊を抑えることができる。According to a fourth aspect of the present invention, there is provided a driving method of an organic EL device.
The same effect as that of claim 1 or claim 7 is obtained, and the current limit is applied when the falling AC voltage is applied between the anode and the cathode, so that deterioration and destruction of the organic EL element can be suppressed. it can.
【００３６】また、請求項５の有機ＥＬ素子の駆動方法
または請求項１１の有機ＥＬ素子の駆動装置によれば、
請求項１または請求項７と同様な効果が得られるととも
に、降下交流電圧を陽極と陰極との間に印加するに際し
て正負の印加電圧を異ならしめるようにしたので、逆バ
イアス電圧を低くして有機ＥＬ素子の劣化や破壊を抑え
ることができる。According to a fifth aspect of the present invention, there is provided a driving method of an organic EL element.
The same effect as that of claim 1 or claim 7 can be obtained, and the positive and negative applied voltages are made different when the falling AC voltage is applied between the anode and the cathode. Deterioration and destruction of the EL element can be suppressed.
【００３７】また、請求項６の有機ＥＬ素子の駆動方法
または請求項１２の有機ＥＬ素子の駆動装置によれば、
請求項１または請求項７と同様な効果が得られるととも
に、少なくとも２つの有機ＥＬ素子を逆並列接続し、有
機ＥＬ素子の陽極と陰極との間に降下交流電圧を印加す
るようにしたので、交流の半サイクル毎に２つの素子
（２０−１、２０−２）に交互に電圧が印加され、図１
の場合と同様な効果が得られるとともに、電圧の利用効
率を上げることができる。According to the method of driving an organic EL element of claim 6 or the driving apparatus of an organic EL element of claim 12,
Since the same effects as those of claim 1 or claim 7 are obtained, at least two organic EL elements are connected in anti-parallel, and a falling AC voltage is applied between the anode and the cathode of the organic EL element. A voltage is alternately applied to the two elements (20-1, 20-2) every half cycle of the alternating current, and FIG.
The same effect as in the case (1) can be obtained, and the voltage use efficiency can be increased.
【図１】本発明の第１実施形態の有機ＥＬ素子の駆動装
置を示す回路図である。FIG. 1 is a circuit diagram showing a driving device of an organic EL element according to a first embodiment of the present invention.
【図２】本発明の第２実施形態の有機ＥＬ素子の駆動装
置を示す回路図である。FIG. 2 is a circuit diagram showing a driving device of an organic EL device according to a second embodiment of the present invention.
【図３】本発明の第３実施形態の有機ＥＬ素子の駆動装
置を示す回路図である。FIG. 3 is a circuit diagram showing a driving device of an organic EL element according to a third embodiment of the present invention.
【図４】本発明実施形態における有機ＥＬ素子の一例を
示す断面図である。FIG. 4 is a cross-sectional view illustrating an example of the organic EL element according to the embodiment of the present invention.
１…変圧器 ２，４−１，４−２，５…抵抗 ３−１，３−２…整流ダイオード １０…商用交流電源 ２０，２０−１，２０−２…有機ＥＬ素子 DESCRIPTION OF SYMBOLS 1 ... Transformer 2,4-1, 4-2, 5 ... Resistor 3-1 and 3-2 ... Rectifier diode 10 ... Commercial AC power supply 20, 20-1, 20-2 ... Organic EL element
Claims (12)
機ＥＬ素子を駆動する有機ＥＬ素子の駆動方法におい
て、 交流電源を受動素子により構成された電圧降下装置にて
降下し、この降下交流電圧を前記陽極と陰極との間に印
加するようにしたことを特徴とする有機ＥＬ素子の駆動
方法。1. A method of driving an organic EL element in which an anode, an organic layer, and a cathode are sequentially laminated, wherein the AC power supply is dropped by a voltage drop device constituted by a passive element. A method for driving an organic EL device, wherein a voltage is applied between the anode and the cathode.
を特徴とする請求項１記載の有機ＥＬ素子の駆動方法。2. The method according to claim 1, wherein said AC power supply is a commercial AC power supply.
し、該トランスより前記降下交流電圧を陽極と陰極との
間に印加するようにしたことを特徴とする請求項１記載
の有機ＥＬ素子の駆動方法。3. The drive of an organic EL device according to claim 1, wherein the voltage drop device is constituted by a transformer, and the AC drop voltage is applied between the anode and the cathode by the transformer. Method.
間に印加するに際して電流制限を施したことを特徴とす
る請求項１記載の有機ＥＬ素子の駆動方法。4. The driving method of an organic EL device according to claim 1, wherein a current is limited when the falling AC voltage is applied between the anode and the cathode.
間に印加するに際して正負の印加電圧を異ならしめるよ
うにしたことを特徴とする請求項１記載の有機ＥＬ素子
の駆動方法。5. The method of driving an organic EL device according to claim 1, wherein when the falling AC voltage is applied between the anode and the cathode, positive and negative applied voltages are made different.
接続し、前記有機ＥＬ素子の前記陽極と陰極との間に前
記降下交流電圧を印加するようにしたことを特徴とする
請求項１記載の有機ＥＬ素子の駆動方法。6. The organic EL device according to claim 1, wherein at least two organic EL devices are connected in anti-parallel, and the alternating current voltage is applied between the anode and the cathode of the organic EL device. A method for driving an organic EL element.
機ＥＬ素子を駆動する有機ＥＬ素子の駆動装置におい
て、 受動素子により構成された交流電源を電圧降下する電圧
降下装置を備え、 前記電圧降下装置にて降下した降下交流電圧を前記陽極
と陰極との間に印加するようにしたことを特徴とする有
機ＥＬ素子の駆動装置。7. An organic EL element driving apparatus for driving an organic EL element in which an anode, an organic layer, and a cathode are sequentially stacked, comprising: a voltage dropping device for dropping a voltage of an AC power supply constituted by a passive element; A driving device for an organic EL element, wherein a falling AC voltage dropped by a dropping device is applied between the anode and the cathode.
を特徴とする請求項７記載の有機ＥＬ素子の駆動装置。8. The driving device for an organic EL device according to claim 7, wherein the AC power supply is a commercial AC power supply.
されていることを特徴とする請求項７記載の有機ＥＬ素
子の駆動装置。9. The driving device for an organic EL device according to claim 7, wherein the voltage drop device is constituted by a transformer.
により前記降下交流電圧を前記陽極と陰極との間に印加
したとき、前記有機ＥＬ素子に流れる駆動電流を制限す
るようにしたことを特徴とする請求項７記載の有機ＥＬ
素子の駆動装置。10. A current limiting device, wherein a drive current flowing through the organic EL element is limited when the falling AC voltage is applied between the anode and the cathode by the current limiting device. The organic EL according to claim 7,
Device driving device.
設定装置により前記降下交流電圧を前記陽極と陰極との
間に印加したとき、正負の印加電圧を異ならしめるよう
にしたことを特徴とする請求項７記載の有機ＥＬ素子の
駆動装置。11. An apparatus for setting an applied voltage, wherein the applied voltage setting apparatus causes positive and negative applied voltages to be different when the falling AC voltage is applied between the anode and the cathode. A driving device for an organic EL device according to claim 7.
列接続し、前記有機ＥＬ素子の前記陽極と陰極との間に
前記降下交流電圧を印加するようにしたことを特徴とす
る請求項７記載の有機ＥＬ素子の駆動装置。12. The organic EL device according to claim 7, wherein at least two organic EL devices are connected in anti-parallel, and the falling AC voltage is applied between the anode and the cathode of the organic EL device. Driving device for organic EL element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000008607A JP2001203077A (en) | 2000-01-18 | 2000-01-18 | Driving method of organic electroluminescent element and driving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000008607A JP2001203077A (en) | 2000-01-18 | 2000-01-18 | Driving method of organic electroluminescent element and driving device |
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| Publication Number | Publication Date |
|---|---|
| JP2001203077A true JP2001203077A (en) | 2001-07-27 |
Family
ID=18536852
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000008607A Pending JP2001203077A (en) | 2000-01-18 | 2000-01-18 | Driving method of organic electroluminescent element and driving device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001203077A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003303683A (en) * | 2002-04-09 | 2003-10-24 | Semiconductor Energy Lab Co Ltd | Luminous device |
| JP2003323988A (en) * | 2002-02-28 | 2003-11-14 | Semiconductor Energy Lab Co Ltd | Light emitting device and electric equipment using the same |
| JP2005071752A (en) * | 2003-08-22 | 2005-03-17 | Konica Minolta Holdings Inc | Lighting system and its driving method |
| JP2005078828A (en) * | 2003-08-28 | 2005-03-24 | Konica Minolta Holdings Inc | Illumination device and driving method of illumination device |
| JP2005149744A (en) * | 2003-11-11 | 2005-06-09 | Konica Minolta Holdings Inc | Lighting system |
| JP2005251398A (en) * | 2004-03-01 | 2005-09-15 | International Manufacturing & Engineering Services Co Ltd | Organic electroluminescent element |
| JP2006243313A (en) * | 2005-03-03 | 2006-09-14 | Hitachi Displays Ltd | Method of driving organic el device and display device |
| JP2007122982A (en) * | 2005-10-26 | 2007-05-17 | Matsushita Electric Works Ltd | Illumination device |
| JP2007122979A (en) * | 2005-10-26 | 2007-05-17 | Matsushita Electric Works Ltd | Lighting device and illumination device |
| JP2009152011A (en) * | 2007-12-19 | 2009-07-09 | Panasonic Electric Works Co Ltd | Planar light-emitting module lighting circuit, and illuminating device |
| KR101849786B1 (en) * | 2009-03-18 | 2018-04-17 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Lighting device |
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2000
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003323988A (en) * | 2002-02-28 | 2003-11-14 | Semiconductor Energy Lab Co Ltd | Light emitting device and electric equipment using the same |
| US7535440B2 (en) | 2002-04-09 | 2009-05-19 | Semiconductor Energy Laboratory Co., Ltd. | Light emitting device |
| JP2003303683A (en) * | 2002-04-09 | 2003-10-24 | Semiconductor Energy Lab Co Ltd | Luminous device |
| JP2005071752A (en) * | 2003-08-22 | 2005-03-17 | Konica Minolta Holdings Inc | Lighting system and its driving method |
| JP2005078828A (en) * | 2003-08-28 | 2005-03-24 | Konica Minolta Holdings Inc | Illumination device and driving method of illumination device |
| JP2005149744A (en) * | 2003-11-11 | 2005-06-09 | Konica Minolta Holdings Inc | Lighting system |
| JP2005251398A (en) * | 2004-03-01 | 2005-09-15 | International Manufacturing & Engineering Services Co Ltd | Organic electroluminescent element |
| JP2006243313A (en) * | 2005-03-03 | 2006-09-14 | Hitachi Displays Ltd | Method of driving organic el device and display device |
| JP2007122982A (en) * | 2005-10-26 | 2007-05-17 | Matsushita Electric Works Ltd | Illumination device |
| JP2007122979A (en) * | 2005-10-26 | 2007-05-17 | Matsushita Electric Works Ltd | Lighting device and illumination device |
| JP4665715B2 (en) * | 2005-10-26 | 2011-04-06 | パナソニック電工株式会社 | Lighting equipment |
| JP2009152011A (en) * | 2007-12-19 | 2009-07-09 | Panasonic Electric Works Co Ltd | Planar light-emitting module lighting circuit, and illuminating device |
| KR101849786B1 (en) * | 2009-03-18 | 2018-04-17 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | Lighting device |
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