JPH06302383A - El element and liquid crystal display device - Google Patents
El element and liquid crystal display deviceInfo
- Publication number
- JPH06302383A JPH06302383A JP5090199A JP9019993A JPH06302383A JP H06302383 A JPH06302383 A JP H06302383A JP 5090199 A JP5090199 A JP 5090199A JP 9019993 A JP9019993 A JP 9019993A JP H06302383 A JPH06302383 A JP H06302383A
- Authority
- JP
- Japan
- Prior art keywords
- light emitting
- voltage
- transparent electrode
- emitting element
- power supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000004973 liquid crystal related substance Substances 0.000 title claims abstract description 64
- 239000000758 substrate Substances 0.000 claims abstract description 51
- 239000000470 constituent Substances 0.000 claims description 11
- 238000009413 insulation Methods 0.000 abstract description 7
- 238000010276 construction Methods 0.000 abstract 1
- 239000010408 film Substances 0.000 description 15
- 239000003086 colorant Substances 0.000 description 12
- 238000004519 manufacturing process Methods 0.000 description 12
- 239000000463 material Substances 0.000 description 9
- 238000000034 method Methods 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 4
- 230000001360 synchronised effect Effects 0.000 description 4
- 239000010409 thin film Substances 0.000 description 4
- 238000005566 electron beam evaporation Methods 0.000 description 3
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 description 3
- 239000011159 matrix material Substances 0.000 description 3
- 238000004544 sputter deposition Methods 0.000 description 3
- 239000004988 Nematic liquid crystal Substances 0.000 description 2
- 229910004298 SiO 2 Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000012190 activator Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 239000009719 polyimide resin Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Landscapes
- Illuminated Signs And Luminous Advertising (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、多色発光可能なＥＬ素
子およびこれを用いてカラー表示を行う液晶表示装置に
関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an EL element capable of emitting multicolor light and a liquid crystal display device for color display using the EL element.
【０００２】[0002]
【従来の技術】従来、液晶素子中の液晶分子の配向状態
を電気的に制御し、入射光を透過／遮断して表示を行う
液晶表示装置には、白色の平面バックライトとカラーフ
ィルタとが用いられてカラー表示が実施される。しかし
ながら、このカラーフィルタは光の透過率が低く、かつ
高価である。このため、表示の明るさ向上や装置の価格
低減を目的として多色発光可能な平面バックライトが使
用される。2. Description of the Related Art Conventionally, a liquid crystal display device which electrically controls the alignment state of liquid crystal molecules in a liquid crystal element and transmits / blocks incident light to perform display has a white flat backlight and a color filter. Used for color display. However, this color filter has low light transmittance and is expensive. Therefore, a planar backlight capable of emitting multicolor is used for the purpose of improving display brightness and reducing the cost of the device.
【０００３】表示装置の表示品質を向上するためには、
高性能な多色発光バックライトが望まれ、特開平４−１
２１７１０には、ＥＣＢ（Electrically ControlledBir
efingence）型液晶素子を用いた多色発光バックライト
が提案されている。また、特開平４−１１０８８９に
は、ＥＬ（Electroluminescent）素子を用いた多色発光
バックライトが提案されている。このようなバックライ
トを用いた液晶表示装置は、時間的にバックライトの発
光色を変化させ、この変化に合わせて液晶素子の表示パ
ターンを変化させるものであり、ＴＦＴ（Thin Film Tr
ansistor）駆動の液晶表示装置や、強誘電性液晶を用い
た液晶表示装置のように表示パターンが走査に従って順
次切換わるものに対応したものではない。In order to improve the display quality of the display device,
A high-performance multicolor light-emitting backlight is desired, and therefore, Japanese Patent Application Laid-Open No. 4-1.
21710 includes an ECB (Electrically ControlledBir).
A multicolor light emitting backlight using an efingence type liquid crystal device has been proposed. Further, Japanese Patent Application Laid-Open No. 4-110889 proposes a multicolor light emitting backlight using an EL (Electroluminescent) element. A liquid crystal display device using such a backlight changes the emission color of the backlight with time and changes the display pattern of the liquid crystal element in accordance with this change.
anistor) drive liquid crystal display device, or a liquid crystal display device using a ferroelectric liquid crystal display pattern does not correspond to those that are sequentially switched according to scanning.
【０００４】[0004]
【発明が解決しようとする課題】上述したＴＦＴ駆動の
液晶表示装置や強誘電性液晶表示装置では、液晶素子の
表示パターンに従ってバックライトの色を順次変化させ
ると、色むらが生じないので、よい表示特性が得られ
る。しかしながら、従来の多色発光バックライトを用い
た液晶表示装置で、液晶素子の表示パターンに従ってバ
ックライトの色が順次変化するような構成は提案されて
おらず、多色発光バックライトを用い、表示パターンに
従ったカラー表示は実現されていなかった。In the above-mentioned TFT-driven liquid crystal display device or ferroelectric liquid crystal display device, if the color of the backlight is sequentially changed according to the display pattern of the liquid crystal element, color unevenness does not occur, which is preferable. Display characteristics are obtained. However, in a liquid crystal display device using a conventional multicolor light emitting backlight, a structure in which the colors of the backlight sequentially change according to the display pattern of the liquid crystal element has not been proposed. Color display according to the pattern was not realized.
【０００５】また、前述したＥＬ素子はバックライトと
して輝度、信頼性、均一性などの点で優れた性能を有し
ているが、ＥＬ素子を多色発光バックライトとして用
い、カラー表示を行う場合、たとえば赤、緑、青の色彩
光を発する３枚のＥＬ素子が必要であり、またそれぞれ
の素子に帯状電極を形成して、この帯状電極に独立に電
圧を印加する必要がある。このため、製造に時間や費用
がかかるなどの不都合が生じ、製造コスト的に問題とな
る。Further, although the above-mentioned EL element has excellent performance as a backlight in terms of brightness, reliability, uniformity, etc., when the EL element is used as a multicolor emission backlight, color display is performed. For example, three EL elements that emit red, green, and blue color light are required, and strip electrodes are formed on each element, and a voltage must be independently applied to the strip electrodes. For this reason, inconvenience such as time and cost being required for manufacturing occurs, which causes a problem in manufacturing cost.
【０００６】本発明の目的は、比較的安価に製造するこ
とができ、多色発光が可能で、かつ新規なＥＬ素子およ
びこれを用いた液晶表示装置を提供することである。An object of the present invention is to provide a novel EL element which can be manufactured at a relatively low cost, can emit multicolor light, and a liquid crystal display device using the same.
【０００７】[0007]
【課題を解決するための手段】本発明は、絶縁性を有す
る基板上に互いに異なる色彩光を発する第１〜第３発光
素子がこの順に積層して形成され、各発光素子は、第１
透明電極、絶縁層、ＥＬ発光層、絶縁層および複数の帯
状の第２透明電極をそれぞれこの順に積層して成り、前
記第２発光素子の各構成部材の積層順位が第１および第
３発光素子の各構成部材の積層順位とは逆であり、前記
第１〜第３発光素子のそれぞれ近接する透明電極が共有
されていることを特徴とするＥＬ素子である。According to the present invention, first to third light emitting elements which emit different colored lights are laminated in this order on a substrate having an insulating property, and each light emitting element is composed of the first light emitting element.
The transparent electrode, the insulating layer, the EL light emitting layer, the insulating layer, and the plurality of strip-shaped second transparent electrodes are laminated in this order, and the stacking order of each constituent member of the second light emitting element is the first and third light emitting elements. The reverse of the stacking order of the respective constituent members, the EL element is characterized in that the transparent electrodes adjacent to each of the first to third light emitting elements are shared.
【０００８】また本発明は、前記第１および第２発光素
子が共有する第１透明電極に、前記ＥＬ発光層が発光す
る閾値電圧以下の交流電圧を印加する第１電源と、前記
第３発光素子の第１透明電極に、前記閾値電圧以下の交
流電圧であって、前記第１電源の交流電圧の位相とは逆
の位相を有する交流電圧を印加する第２電源と、前記第
２および第３発光素子が共有する第２透明電極に、前記
閾値電圧の交流電圧を、前記第１および第２電源による
交流電圧の印加タイミングと同期させて印加する第３電
源と、前記第１発光素子の第２透明電極に、前記閾値電
圧の交流電圧であって、前記第１電源の交流電圧の位相
とは逆の位相を有する交流電圧を印加する第４電源とを
備えることを特徴とするＥＬ素子である。Further, according to the present invention, the first transparent electrode shared by the first and second light emitting elements is applied with a first power supply for applying an alternating voltage equal to or lower than a threshold voltage at which the EL light emitting layer emits light, and the third light emission. A second power supply for applying an AC voltage having an AC voltage equal to or lower than the threshold voltage and having a phase opposite to a phase of the AC voltage of the first power supply to the first transparent electrode of the element; A third power source for applying the AC voltage of the threshold voltage to the second transparent electrode shared by the three light emitting elements in synchronization with the application timing of the AC voltage by the first and second power sources, and the first light emitting element. An EL element comprising: a second transparent electrode; and a fourth power supply for applying an AC voltage having the AC voltage of the threshold voltage and having a phase opposite to the phase of the AC voltage of the first power supply. Is.
【０００９】さらに本発明は、一対の絶縁性基板の一方
基板上に、互いに異なる色彩光を発する第１および第２
発光素子がこの順に積層して形成され、前記一対の絶縁
性基板の他方基板上に、前記第１および第２発光素子と
は異なる色彩光を発する第３発光素子が形成され、各発
光素子は、第１透明電極、絶縁層、ＥＬ発光層、絶縁層
および複数の帯状の第２透明電極をそれぞれこの順に積
層して成り、前記第２発光素子の各構成部材の積層順位
が第１発光素子の各構成部材の積層順位とは逆であり、
前記第１および第２発光素子の近接する透明電極が共有
されており、前記一対の絶縁性基板の発光素子が形成さ
れた側の表面が、互いに対向するようにして貼り合わせ
られていることを特徴とするＥＬ素子である。Further, according to the present invention, first and second color lights emitting mutually different color lights are provided on one of the pair of insulating substrates.
Light emitting elements are stacked in this order, and a third light emitting element that emits colored light different from that of the first and second light emitting elements is formed on the other substrate of the pair of insulating substrates. , A first transparent electrode, an insulating layer, an EL light emitting layer, an insulating layer, and a plurality of strip-shaped second transparent electrodes, which are stacked in this order, and the order of stacking the respective constituent members of the second light emitting element is the first light emitting element. It is the reverse of the stacking order of each component of,
The transparent electrodes adjacent to the first and second light emitting elements are shared, and the surfaces of the pair of insulating substrates on the side where the light emitting elements are formed are bonded so as to face each other. It is a characteristic EL element.
【００１０】さらにまた本発明は、前記第２発光素子の
第１透明電極に、前記ＥＬ発光層が発光する閾値電圧以
下の交流電圧を印加する第１電源と、前記第３発光素子
の第１透明電極に、前記第１電源と同様の交流電圧を印
加する第２電源と、前記第１発光素子の第１透明電極
に、前記閾値電圧以下の交流電圧であって、前記第１お
よび第２電源の交流電圧の位相とは逆の位相を有する交
流電圧を印加する第３電源と、前記第１および第２発光
素子が共有する第２透明電極に、前記閾値電圧の交流電
圧を、前記第１および第３電源による交流電圧の印加タ
イミングと同期させて印加する第４電源と、前記第３発
光素子の第２透明電極に、前記閾値電圧の交流電圧であ
って、前記第２電源の交流電圧の位相とは逆の位相を有
する交流電圧を印加する第５電源とを備えることを特徴
とするＥＬ素子である。Still further, according to the present invention, a first power source for applying an alternating voltage equal to or lower than a threshold voltage at which the EL light emitting layer emits light to the first transparent electrode of the second light emitting element, and the first light emitting element for the third light emitting element. A second power supply that applies the same AC voltage as the first power supply to the transparent electrode, and an AC voltage that is equal to or lower than the threshold voltage to the first transparent electrode of the first light emitting element, and the first and second The third AC power supply for applying an AC voltage having a phase opposite to the AC voltage of the power supply and the second transparent electrode shared by the first and second light emitting elements are provided with the AC voltage of the threshold voltage as the first voltage. A fourth power supply which is applied in synchronism with the application timing of the AC voltage by the first and third power supplies, and an AC voltage of the threshold voltage, which is the AC voltage of the second power supply, applied to the second transparent electrode of the third light emitting element. Apply an AC voltage that has the opposite phase to the voltage phase That an EL element; and a fifth power source.
【００１１】さらにまた本発明は、透明電極と配向膜と
がこの順にそれぞれ形成された一対の透光性基板間に液
晶層が介在され、前記一対の透光性基板のいずれか一方
基板側に、上述のＥＬ素子が配置されていることを特徴
とする液晶表示装置である。Furthermore, according to the present invention, a liquid crystal layer is interposed between a pair of translucent substrates each having a transparent electrode and an alignment film formed in this order, and one of the pair of translucent substrates is provided on the substrate side. A liquid crystal display device, in which the above-mentioned EL element is arranged.
【００１２】[0012]
【作用】本発明に従えば、絶縁性基板上に第１〜第３発
光素子がこの順に積層して形成されてＥＬ素子とされ
る。各発光素子は、第１透明電極、絶縁層、ＥＬ発光
層、絶縁層および複数の帯状の第２透明電極をこの順に
積層して成り、互いに異なる色彩光を発する。また、第
２発光素子の各構成部材の積層順位は、第１および第３
発光素子の各構成部材の積層順位とは逆であり、前記第
１〜第３発光素子のそれぞれ近接する透明電極が共有さ
れる。According to the present invention, the first to third light emitting elements are laminated in this order on the insulating substrate to form an EL element. Each light emitting element is formed by laminating a first transparent electrode, an insulating layer, an EL light emitting layer, an insulating layer and a plurality of strip-shaped second transparent electrodes in this order, and emits different colored lights. In addition, the stacking order of the respective constituent members of the second light emitting element is the first and the third.
The stacking order of the respective constituent members of the light emitting device is opposite, and the transparent electrodes adjacent to each of the first to third light emitting devices are shared.
【００１３】したがって、第１〜第３発光素子の電極間
に電圧を印加してＥＬ発光層を発光させると、異なる色
彩光が得られる。また、第１〜第３発光素子のそれぞれ
近接する第１および第２透明電極が共有されるので、Ｅ
Ｌ素子の厚みが薄くなる。さらに、形成する電極数が減
少し、帯状電極の数は少なくとも２層となるので、製造
工程の短縮化が図れ、製造コストが低減する。Therefore, when a voltage is applied between the electrodes of the first to third light emitting elements to cause the EL light emitting layer to emit light, different colored light is obtained. In addition, since the first and second transparent electrodes of the first to third light emitting elements which are close to each other are shared, E
The thickness of the L element becomes thin. Furthermore, since the number of electrodes to be formed is reduced and the number of strip electrodes is at least two layers, the manufacturing process can be shortened and the manufacturing cost can be reduced.
【００１４】また本発明に従えば、たとえば前記第１お
よび第２発光素子が共有する第１透明電極に第１電源が
接続され、前記第３発光素子の第１透明電極に第２電源
が接続され、前記第２および第３発光素子が共有する第
２透明電極に第３電源が接続され、前記第１発光素子の
第２透明電極に第４電源が接続される。According to the invention, for example, the first power source is connected to the first transparent electrode shared by the first and second light emitting elements, and the second power source is connected to the first transparent electrode of the third light emitting element. A third power source is connected to the second transparent electrode shared by the second and third light emitting elements, and a fourth power source is connected to the second transparent electrode of the first light emitting element.
【００１５】第１電源からは、前記ＥＬ発光層が発光す
る閾値電圧以下の交流電圧が印加され、第２電源からは
前記閾値電圧以下の電圧であって、前記第１電源の交流
電圧の位相とは逆の位相を有する交流電圧が印加され
る。また、第３電源からは、前記閾値電圧の電圧であっ
て、たとえば前記第１電源による交流電圧の印加タイミ
ングと同期させた交流電圧が印加される。An AC voltage below the threshold voltage for emitting light from the EL light emitting layer is applied from the first power supply, and a voltage below the threshold voltage from the second power supply, the phase of the AC voltage of the first power supply. An alternating voltage having a phase opposite to that of is applied. Further, from the third power source, an AC voltage having the threshold voltage, which is synchronized with the application timing of the AC voltage from the first power source, is applied.
【００１６】このとき、第３発光素子には、閾値電圧以
上の電圧が印加されるので、第３発光素子のＥＬ発光層
が発光する。また、第２発光素子には、閾値電圧以下の
電圧しか印加されないので、第２発光素子のＥＬ発光層
は発光しない。一方、第３電源から、前記閾値電圧の電
圧であって、前記第２電源による交流電圧の印加タイミ
ングと同期させた交流電圧を印加すると、第３発光素子
に印加される電圧と第２発光素子に印加される電圧とが
逆になり、第３発光素子のＥＬ発光層は発光せず、第２
発光素子のＥＬ発光層が発光する。At this time, since a voltage equal to or higher than the threshold voltage is applied to the third light emitting element, the EL light emitting layer of the third light emitting element emits light. Further, since only the voltage equal to or lower than the threshold voltage is applied to the second light emitting element, the EL light emitting layer of the second light emitting element does not emit light. On the other hand, when an AC voltage, which is the threshold voltage and is synchronized with the application timing of the AC voltage from the second power supply, is applied from the third power supply, the voltage applied to the third light emitting element and the second light emitting element. The voltage applied to the LED is reversed, and the EL light emitting layer of the third light emitting element does not emit light.
The EL light emitting layer of the light emitting element emits light.
【００１７】第４電源からは、前記閾値電圧の電圧であ
って、前記第１電源の交流電圧の位相とは逆の位相を有
する交流電圧が印加される。このため、第１発光素子に
閾値電圧以上の電圧が印加されて、第１発光素子のＥＬ
発光層が発光する。An AC voltage having the threshold voltage and having a phase opposite to the AC voltage of the first power supply is applied from the fourth power supply. Therefore, a voltage equal to or higher than the threshold voltage is applied to the first light emitting element, and the EL of the first light emitting element is
The light emitting layer emits light.
【００１８】したがって、第２および第３発光素子が共
有する帯状の第２透明電極に印加する交流電圧の位相を
切換える、および第１発光素子の帯状の第２透明電極に
電圧を印加することによって、異なる色彩光を順次発光
させることが可能となる。また、それぞれの発光素子の
発光色を、たとえば赤、緑、青とし、液晶表示装置のバ
ックライトとして用いることが可能となる。Therefore, by switching the phase of the AC voltage applied to the strip-shaped second transparent electrode shared by the second and third light emitting elements, and by applying the voltage to the strip-shaped second transparent electrode of the first light emitting element. It is possible to sequentially emit different colored lights. Further, the emission colors of the respective light emitting elements can be set to, for example, red, green, and blue, and can be used as a backlight of a liquid crystal display device.
【００１９】さらに本発明に従えば、第１および第２発
光素子がこの順に積層して形成された絶縁性を有する一
方基板と、第３発光素子が形成された絶縁性を有する他
方基板とが、互いの基板の発光素子が形成された側の表
面が対向するようにして貼り合わせられて、ＥＬ素子と
される。各発光素子は、前述した発光素子と同様にして
成り、互いに異なる色彩光を発する。また、第２発光素
子の各構成部材の積層順位は、第１発光素子の各構成部
材の積層順位とは逆であり、前記第１および第２発光素
子の近接する透明電極が共有される。Further, according to the present invention, there is provided an insulating one substrate in which the first and second light emitting elements are laminated in this order and an insulative other substrate in which the third light emitting element is formed. Then, the substrates are attached so that the surfaces of the substrates on which the light emitting elements are formed face each other to form an EL element. Each light emitting element is formed in the same manner as the above light emitting element, and emits different colored light. The stacking order of the constituent members of the second light emitting element is opposite to the stacking order of the constituent members of the first light emitting element, and the transparent electrodes adjacent to the first and second light emitting elements are shared.
【００２０】したがって、第１〜第３発光素子の電極間
に電圧を印加して、ＥＬ発光層を発光させると、異なる
色彩光が得られる。また、第１〜第３発光素子が外気か
ら遮断されるので、湿気の影響が低減される。このた
め、ＥＬ発光層の安定性が向上し、信頼性を向上するこ
とが可能となる。さらに、第１発光素子と第２発光素子
との近接する透明電極が共有されるので、製造工程が短
縮して製造コストが低減する。Therefore, when a voltage is applied between the electrodes of the first to third light emitting elements to cause the EL light emitting layer to emit light, different colored light is obtained. Moreover, since the first to third light emitting elements are shielded from the outside air, the influence of moisture is reduced. Therefore, the stability of the EL light emitting layer is improved, and the reliability can be improved. Further, since the transparent electrodes adjacent to the first light emitting element and the second light emitting element are shared, the manufacturing process is shortened and the manufacturing cost is reduced.
【００２１】さらにまた本発明に従えば、第２発光素子
の第１透明電極に第１電源が接続され、第３発光素子の
第１透明電極に第２電源が接続され、第１発光素子の第
１透明電極に第３電源が接続され、第１および第２発光
素子が共有する第２透明電極に第４電源が接続され、第
３発光素子の第２透明電極に第５電源が接続される。Furthermore, according to the present invention, the first power source is connected to the first transparent electrode of the second light emitting element, the second power source is connected to the first transparent electrode of the third light emitting element, and the first light emitting element of the third light emitting element is connected. A third power source is connected to the first transparent electrode, a fourth power source is connected to the second transparent electrode shared by the first and second light emitting elements, and a fifth power source is connected to the second transparent electrode of the third light emitting element. It
【００２２】第１および第２電源からは、前記ＥＬ発光
層が発光する閾値電圧以下の交流電圧がそれぞれ印加さ
れ、第３電源からは、前記閾値電圧以下の交流電圧であ
って、前記第１および第２電源の交流電圧の位相とは逆
の位相を有する交流電圧が印加される。また、第４電源
からは、前記閾値電圧の電圧であって、たとえば前記第
１電源による交流電圧の印加タイミングと同期させた交
流電圧が印加される。From the first and second power supplies, an AC voltage below the threshold voltage at which the EL light emitting layer emits light is applied, respectively, and from the third power supply, an AC voltage below the threshold voltage, which is the first voltage. And an AC voltage having a phase opposite to the phase of the AC voltage of the second power supply is applied. Further, from the fourth power supply, an AC voltage, which is the voltage of the threshold voltage and is synchronized with the application timing of the AC voltage from the first power supply, is applied.
【００２３】このとき、第１発光素子には閾値電圧以上
の電圧が印加されるので、第１発光素子のＥＬ発光層が
発光する。また、第２発光素子には閾値電圧以下の電圧
しか印加されないので、第２発光素子のＥＬ発光層は発
光しない。一方、第４電源から、前記閾値電圧の電圧で
あって、前記第３電源による交流電圧の印加タイミング
と同期させた交流電圧を印加すると、第１発光素子に印
加される電圧と第２発光素子に印加される電圧とが逆に
なり、第１発光素子のＥＬ発光層は発光せず、第２発光
素子のＥＬ発光層が発光する。At this time, since a voltage higher than the threshold voltage is applied to the first light emitting element, the EL light emitting layer of the first light emitting element emits light. Further, since only the voltage equal to or lower than the threshold voltage is applied to the second light emitting element, the EL light emitting layer of the second light emitting element does not emit light. On the other hand, when an AC voltage, which is the threshold voltage and is synchronized with the AC voltage application timing by the third power source, is applied from the fourth power source, the voltage applied to the first light emitting element and the second light emitting element are applied. The voltage applied to the LED is reversed, the EL light emitting layer of the first light emitting element does not emit light, and the EL light emitting layer of the second light emitting element emits light.
【００２４】第５電源からは、前記閾値電圧の電圧であ
って、第２電源の交流電圧の位相とは逆の位相を有する
交流電圧が印加される。このため、第３発光素子に閾値
電圧以上の電圧が印加されて、第３発光素子のＥＬ発光
層が発光する。From the fifth power supply, an AC voltage having the threshold voltage and having a phase opposite to the phase of the AC voltage of the second power supply is applied. Therefore, a voltage equal to or higher than the threshold voltage is applied to the third light emitting element, and the EL light emitting layer of the third light emitting element emits light.
【００２５】したがって、第１および第２発光素子が共
有する帯状の第２透明電極に印加する交流電圧の位相を
切換える、および第３発光素子の帯状の第２透明電極に
電圧を印加することによって、異なる色彩光を順次発光
させることが可能となる。また、それぞれの発光素子の
色彩光を、たとえば赤、緑、青とし、液晶表示装置のバ
ックライトとして用いることが可能となる。さらに、第
１電源から第２発光素子の第１透明電極に印加する電圧
と、第２電源から第３発光素子の第１透明電極に印加す
る電圧とは等しいので、第１電源と第２電源とを共有し
て用いることも可能である。Therefore, by switching the phase of the AC voltage applied to the strip-shaped second transparent electrode shared by the first and second light emitting elements, and by applying the voltage to the strip-shaped second transparent electrode of the third light emitting element. It is possible to sequentially emit different colored lights. Further, the color lights of the respective light emitting elements can be red, green and blue, for example, and can be used as a backlight of a liquid crystal display device. Furthermore, since the voltage applied from the first power supply to the first transparent electrode of the second light emitting element is equal to the voltage applied from the second power supply to the first transparent electrode of the third light emitting element, the first power supply and the second power supply It is also possible to share and use.
【００２６】さらにまた本発明に従えば、一対の透光性
基板間に液晶層が介在され、前記透光性基板の液晶層側
表面に透明電極と配向膜とがそれぞれこの順に形成され
る。また、前記一対の透光性基板のいずれか一方基板側
に、前記ＥＬ素子が形成される。Furthermore, according to the present invention, a liquid crystal layer is interposed between a pair of transparent substrates, and a transparent electrode and an alignment film are formed in this order on the liquid crystal layer side surface of the transparent substrate. Further, the EL element is formed on the substrate side of either one of the pair of translucent substrates.
【００２７】したがって、液晶分子の配向状態を電気的
に制御して入射光を透過／遮断し、また第１〜第３発光
素子に電圧を印加して異なる色彩光を順次発光させるこ
とによって、異なる色彩の表示を行うことができる。ま
た、それぞれの発光素子の色彩光を赤、緑、青として画
像信号に基づくカラー表示を行うことが可能となる。こ
の場合、従来から用いられるカラーフィルタが不要とな
るので、比較的低価格な液晶表示装置を提供することが
できる。Therefore, the alignment state of the liquid crystal molecules is electrically controlled to transmit / block the incident light, and a voltage is applied to the first to third light emitting elements to sequentially emit different colored lights, thereby making different. Color can be displayed. Further, it is possible to perform color display based on an image signal by setting the color light of each light emitting element to red, green and blue. In this case, since the color filter used conventionally is unnecessary, it is possible to provide a relatively low-priced liquid crystal display device.
【００２８】[0028]
【実施例】図１は、本発明の第１の実施例であるＥＬ素
子１の構成を示す断面図である。ＥＬ素子１は、透光性
基板２、透明電極３，７，１１，１５、絶縁層４，６，
８，１０，１２，１４、ＥＬ発光層５，９，１３および
電源１６〜１９を含んで構成される。前記透明電極３，
７、絶縁層４，６およびＥＬ発光層５は第１発光素子を
構成し、透明電極７，１１、絶縁層８，１０およびＥＬ
発光層９は第２発光素子を構成し、透明電極１１，１
５、絶縁層１２，１４およびＥＬ発光層１３は第３発光
素子を構成している。すなわち、第１〜第３発光素子の
それぞれ近接する透明電極は、共有されている。1 is a cross-sectional view showing the structure of an EL element 1 which is a first embodiment of the present invention. The EL element 1 includes a transparent substrate 2, transparent electrodes 3, 7, 11, 15 and insulating layers 4, 6,
8, 10, 12, 14, EL light emitting layers 5, 9, 13 and power supplies 16 to 19. The transparent electrode 3,
7, the insulating layers 4 and 6 and the EL light emitting layer 5 constitute the first light emitting element, and the transparent electrodes 7 and 11, the insulating layers 8 and 10 and the EL
The light emitting layer 9 constitutes the second light emitting element, and the transparent electrodes 11 and 1
5, the insulating layers 12 and 14 and the EL light emitting layer 13 constitute a third light emitting element. That is, the transparent electrodes adjacent to each of the first to third light emitting elements are shared.
【００２９】たとえばガラスで実現される透光性基板２
の一方表面２ａには、たとえば膜厚が１０００ÅのＩＴ
Ｏ（Indium Tin Oxide）膜から成る透明電極３が高周波
スパッタリング法によって形成される。透明電極３上に
は、たとえば膜厚が１５００Å〜２０００ÅのＳｉ3Ｎ4
あるいはＳｉＯ2から成る絶縁層４が高周波スパッタリ
ング法によって形成される。絶縁層４上には、たとえば
膜厚が７０００Å〜１００００Åの青色の色彩光を発す
るＥＬ発光層５が電子ビーム蒸着法によって形成され
る。ＥＬ発光層５上には前記絶縁層４と同様に絶縁層６
が形成され、絶縁層６上には前記透明電極３と同様に透
明電極７が形成され、透明電極７上には前記絶縁層４と
同様に絶縁層８が形成される。絶縁層８上には、たとえ
ば膜厚が７０００Å〜１００００Åの緑色の色彩光を発
するＥＬ発光層９が電子ビーム蒸着法によって形成され
る。ＥＬ発光層９上には、前記絶縁層４と同様に絶縁層
１０が形成され、絶縁層１０上には前記透明電極３と同
様に透明電極１１が形成され、透明電極１１上には前記
絶縁層４と同様に絶縁層１２が形成される。絶縁層１２
上には、たとえば膜厚が７０００Å〜１００００Åの赤
色の色彩光を発するＥＬ発光層１３が電子ビーム蒸着法
によって形成される。ＥＬ発光層１３上には前記絶縁層
４と同様に絶縁層１４が形成され、絶縁層１４上には前
記透明電極３と同様に透明電極１５が形成される。A transparent substrate 2 made of glass, for example.
On one surface 2a, for example, IT with a film thickness of 1000 Å
The transparent electrode 3 made of an O (Indium Tin Oxide) film is formed by a high frequency sputtering method. On the transparent electrode 3, for example, Si 3 N 4 having a film thickness of 1500Å to 2000Å
Alternatively, the insulating layer 4 made of SiO 2 is formed by the high frequency sputtering method. On the insulating layer 4, for example, an EL light emitting layer 5 which emits blue color light having a film thickness of 7,000 Å to 10,000 Å is formed by an electron beam evaporation method. An insulating layer 6 is formed on the EL light emitting layer 5 similarly to the insulating layer 4.
The transparent electrode 7 is formed on the insulating layer 6 similarly to the transparent electrode 3, and the insulating layer 8 is formed on the transparent electrode 7 similar to the insulating layer 4. On the insulating layer 8, for example, an EL light emitting layer 9 that emits green color light having a film thickness of 7,000 Å to 10,000 Å is formed by an electron beam evaporation method. An insulating layer 10 is formed on the EL light emitting layer 9 similarly to the insulating layer 4, a transparent electrode 11 is formed on the insulating layer 10 similar to the transparent electrode 3, and the insulating layer 11 is formed on the transparent electrode 11. An insulating layer 12 is formed similar to layer 4. Insulating layer 12
An EL light emitting layer 13 that emits red color light having a film thickness of 7,000 Å to 10,000 Å, for example, is formed thereon by an electron beam evaporation method. An insulating layer 14 is formed on the EL light emitting layer 13 similarly to the insulating layer 4, and a transparent electrode 15 is formed on the insulating layer 14 similar to the transparent electrode 3.
【００３０】前記透明電極３，７，１１，１５は、電極
３，１１あるいは電極７，１５のいずれか一方が複数の
帯状電極とされ、本実施例では電極３，１１を複数の帯
状電極とした。帯状電極３，１１は、互いに同じ方向と
なるように形成される。また、電極３，７，１１，１５
には、交流電圧を発生する電源１６〜１９がそれぞれ接
続される。第１電源である電源１７からは、ＥＬ発光層
５，９，１３が発光する閾値電圧Ｖｔｈ以下の交流電圧
が印加され、第２電源である電源１９からは前記閾値電
圧Ｖｔｈ以下の交流電圧であって、前記電源１７の交流
電圧の位相とは逆位相の交流電圧が印加される。また、
第３電源である電源１８からは、前記閾値電圧Ｖｔｈの
交流電圧が、前記電源１７あるいは電源１９の交流電圧
の印加タイミングと同期させて印加される。さらに、第
４電源である電源１６からは、前記閾値電圧Ｖｔｈの交
流電圧であって、前記電源１７の交流電圧の位相とは逆
位相の交流電圧が印加される。In the transparent electrodes 3, 7, 11 and 15, either one of the electrodes 3 and 11 or the electrodes 7 and 15 is a plurality of strip electrodes. In this embodiment, the electrodes 3 and 11 are a plurality of strip electrodes. did. The strip electrodes 3 and 11 are formed in the same direction. In addition, the electrodes 3, 7, 11, 15
Power sources 16 to 19 that generate an AC voltage are connected to the respective. An AC voltage equal to or lower than the threshold voltage Vth at which the EL light emitting layers 5, 9 and 13 emit light is applied from the power source 17 which is the first power source, and an AC voltage equal to or lower than the threshold voltage Vth is applied from the power source 19 which is the second power source. Therefore, an AC voltage having a phase opposite to that of the AC voltage of the power source 17 is applied. Also,
The AC voltage having the threshold voltage Vth is applied from the third power supply 18 in synchronization with the application timing of the AC voltage of the power supply 17 or the power supply 19. Further, from the power supply 16 which is the fourth power supply, an AC voltage having the threshold voltage Vth and having an opposite phase to the AC voltage of the power supply 17 is applied.
【００３１】なお、本発明ではＥＬ発光層５，９，１３
の発光色をそれぞれ青、緑、赤とする例について説明し
たけれども、発光色はこれに限る必要はなく、他の発光
色とする例も本発明の範囲に属するものである。また、
青、緑、赤の発光色を有するＥＬ発光層５，９，１３の
積層順位はこれに限るものではなく、他の順位で積層し
てもかまわない。In the present invention, the EL light emitting layers 5, 9, 13 are used.
Although the examples in which the emission colors are blue, green, and red have been described, the emission colors are not limited to these, and examples in which other emission colors are included are also within the scope of the present invention. Also,
The stacking order of the EL light emitting layers 5, 9, and 13 having the blue, green, and red emission colors is not limited to this, and they may be stacked in other orders.
【００３２】図２は、一般的な二重絶縁層構造の薄膜Ｅ
Ｌ素子２１の構成を示す断面図である。ＥＬ素子２１
は、透光性基板２２、透明電極２３、絶縁層２４、ＥＬ
発光層２５、絶縁層２６および金属電極２７を含み、こ
れらをこの順番に積層して構成される。透光性基板２２
は、たとえばガラスで実現され、透明電極２３は、たと
えば１０００ÅのＩＴＯで実現される。また、絶縁層２
４，２６は、たとえば１５００Å〜２０００ÅのＳｉ3
Ｎ4やＳｉＯ2で実現され、金属電極２７は、たとえばＡ
ｌで実現される。前記透明電極２３と、絶縁層２４，２
６とは、たとえば高周波スパッタリング法によって作成
される。FIG. 2 shows a thin film E having a general double insulating layer structure.
3 is a cross-sectional view showing the configuration of an L element 21. EL element 21
Is a transparent substrate 22, transparent electrode 23, insulating layer 24, EL
The light emitting layer 25, the insulating layer 26, and the metal electrode 27 are included, and these are laminated in this order. Translucent substrate 22
Is realized, for example, with glass, and the transparent electrode 23 is realized with, for example, 1000 Å ITO. In addition, the insulating layer 2
4, 26 are, for example, 1500 Å to 2000 Å Si 3
It is realized by N 4 or SiO 2 , and the metal electrode 27 is made of, for example, A
It is realized by l. The transparent electrode 23 and the insulating layers 24 and 2
6 is created by, for example, a high frequency sputtering method.
【００３３】発光層２５は、７０００Å〜１００００Å
の膜厚となるように、たとえば電子ビーム蒸着法によっ
て作成される。たとえば、発光色を赤色とする場合、母
材としてのＣａＳに付活剤としてのＥｕを添加した発光
層材料が用いられる。また、発光色を青色とする場合、
ＳｒＳにＣｅを添加した発光層材料が用いられ、発光色
を緑色とする場合、ＺｎＳにＴｂを添加した発光層材料
が用いられる。前述したＥＬ発光層５，９，１３とし
て、たとえばこのような発光層材料が用いられる。The light emitting layer 25 has a thickness of 7,000 Å to 10000 Å
Is formed by, for example, an electron beam vapor deposition method. For example, when the emission color is red, a light emitting layer material in which Eu as an activator is added to CaS as a base material is used. Also, when the emission color is blue,
A light emitting layer material obtained by adding Ce to SrS is used. When the emission color is green, a light emitting layer material obtained by adding Tb to ZnS is used. As the above-mentioned EL light emitting layers 5, 9 and 13, for example, such a light emitting layer material is used.
【００３４】本実施例のＥＬ素子１は、前記ＥＬ素子２
１を三層積層したものであるが、互いの層間で近接する
電極形状を等しくし、共有して用いる構造となってい
る。二重絶縁構造の薄膜ＥＬ素子の発光輝度は、駆動交
流電圧周波数にほぼ比例して変化する。前記ＥＬ素子２
１では、１ｋＨｚの周波数の交流電圧を印加すると、赤
色、青色および緑色の発光色の場合で、それぞれ５００
０ｃｄ／ｍ2〜１０００ｃｄ／ｍ2の発光輝度が得られ
る。なお、ＥＬ素子２１は、上述した材料や作成方法を
用いなくとも作成することが可能であり、したがって本
実施例のＥＬ素子１においても上述した材料や作成方法
に限らず、その他の材料や作成方法を用いて作成するこ
とも可能である。The EL element 1 of this embodiment is the same as the EL element 2 described above.
Although three layers of No. 1 are laminated, the adjacent electrodes have the same shape and are used in common. The emission brightness of the double-insulation thin-film EL element changes substantially in proportion to the driving AC voltage frequency. The EL element 2
In No. 1, when an AC voltage with a frequency of 1 kHz is applied, red, blue, and green emission colors are 500, respectively.
A light emission luminance of 0 cd / m 2 to 1000 cd / m 2 is obtained. The EL element 21 can be manufactured without using the above-described materials and manufacturing methods. Therefore, the EL element 1 of the present embodiment is not limited to the above-described materials and manufacturing methods, and other materials and manufacturing methods can be used. It is also possible to create using the method.
【００３５】図３は、前記ＥＬ素子１に印加する交流電
圧を示す波形図である。図３（１）は電極１５に印加す
る交流電圧波形を示し、図３（２）は電極７に印加する
交流電圧波形を示し、図３（３）は電極１１に印加する
交流電圧波形を示し、図３（４）は電極３に印加する交
流電圧波形を示す。また、図３（５）は、発光層１３，
５に印加される交流電圧波形を示し、図３（６）は発光
層９に印加される交流電圧波形を示す。FIG. 3 is a waveform diagram showing an AC voltage applied to the EL element 1. 3 (1) shows an AC voltage waveform applied to the electrode 15, FIG. 3 (2) shows an AC voltage waveform applied to the electrode 7, and FIG. 3 (3) shows an AC voltage waveform applied to the electrode 11. 3 (4) shows an AC voltage waveform applied to the electrode 3. Further, FIG. 3 (5) shows that the light emitting layer 13,
5 shows an AC voltage waveform applied to No. 5, and FIG. 3 (6) shows an AC voltage waveform applied to the light emitting layer 9.
【００３６】電極１５，７には、図３（１）および図３
（２）に示される、互いに逆位相の電圧Ｖ１が、電源１
９，１７からそれぞれ印加される。また、電極１１に
は、図３（３）に示される、たとえば電極１５に印加し
た電圧Ｖ１とは逆位相の電圧Ｖ２（＞Ｖ１）が、電源１
８から印加される。このとき発光層１３には、図３
（５）に示される電圧Ｖ１＋Ｖ２が印加され、発光層９
には図３（６）に示される電圧Ｖ２−Ｖ１が印加され
る。発光層５，９，１３が発光し始める閾値電圧をＶｔ
ｈとし、Ｖ１＋Ｖ２＞Ｖｔｈ＞Ｖ２−Ｖ１となるように
印加電圧を設定すると、前記発光層１３が赤色に発光す
る。The electrodes 15 and 7 have a structure shown in FIG.
The voltages V1 having opposite phases shown in (2) are applied to the power source 1
It is applied from 9 and 17, respectively. Further, a voltage V2 (> V1) shown in FIG. 3C, which has a phase opposite to the voltage V1 applied to the electrode 15, for example, is applied to the electrode 11 at the power source 1.
8 is applied. At this time, the light emitting layer 13 has a structure shown in FIG.
The voltage V1 + V2 shown in (5) is applied, and the light emitting layer 9
Is applied with the voltage V2-V1 shown in FIG. The threshold voltage at which the light emitting layers 5, 9 and 13 start to emit light is Vt
When the applied voltage is set to h and V1 + V2>Vth> V2-V1, the light emitting layer 13 emits red light.
【００３７】一方、電極１１に印加する電圧Ｖ２の極性
を切換えて、電極７に印加した電圧Ｖ１とは逆位相の電
圧Ｖ２（＞Ｖ１）を印加すると、発光層１３には図３
（６）に示される電圧Ｖ２−Ｖ１が印加され、発光層９
には図３（５）に示される電圧Ｖ１＋Ｖ２が印加される
ので、発光層９が緑色に発光する。また、電極３には、
図３（４）に示される、電極７に印加した電圧Ｖ１とは
逆位相の電圧Ｖ２（＞Ｖ１）が、電源１６から印加され
る。このとき発光層５には図３（５）に示される電圧Ｖ
１＋Ｖ２が印加されるので、発光層５が青色に発光す
る。On the other hand, when the polarity of the voltage V2 applied to the electrode 11 is switched and a voltage V2 (> V1) having a phase opposite to that of the voltage V1 applied to the electrode 7 is applied, the light emitting layer 13 is applied to the light emitting layer 13 as shown in FIG.
The voltage V2-V1 shown in (6) is applied, and the light emitting layer 9
3 is applied with the voltage V1 + V2 shown in FIG. 3 (5), the light emitting layer 9 emits green light. In addition, the electrode 3 has
A voltage V2 (> V1) having a phase opposite to the voltage V1 applied to the electrode 7 shown in FIG. 3 (4) is applied from the power supply 16. At this time, the voltage V shown in FIG.
Since 1 + V2 is applied, the light emitting layer 5 emits blue light.
【００３８】このように本実施例のＥＬ素子１では、選
択的に電極１１に印加する電圧の位相を切換える、ある
いは電極３に電圧を印加することによって、ＥＬ発光層
５，９，１３を選択して発光させることが可能となる。
なお、本実施例では電圧Ｖ１を５０Ｖとし、電圧Ｖ２を
それぞれのＥＬ発光層５，９，１３の閾値電圧Ｖｔｈに
相当する１８０Ｖとした。As described above, in the EL element 1 of the present embodiment, the EL light emitting layers 5, 9 and 13 are selected by selectively switching the phase of the voltage applied to the electrode 11 or applying the voltage to the electrode 3. It becomes possible to emit light.
In this example, the voltage V1 was set to 50V, and the voltage V2 was set to 180V corresponding to the threshold voltage Vth of the EL light emitting layers 5, 9, and 13.
【００３９】図４は、本発明の第２の実施例であるＥＬ
素子４１の構成を示す断面図である。ＥＬ素子４１は、
透光性基板４２，５２、透明電極４３，４７，５１，５
３，５７、絶縁層４４，４６，４８，５０，５４，５
６、ＥＬ発光層４５，４９，５５、接着剤５８およびオ
イル５９を含んで構成される。たとえばガラスで実現さ
れる透光性基板４２の一方表面４２ａには、第１の実施
例と同様にして透明電極４３、絶縁層４４、ＥＬ発光層
４５、絶縁層４６、透明電極４７、絶縁層４８、ＥＬ発
光層４９、絶縁層５０、および透明電極５１がこの順に
積層して形成される。また、同じくたとえばガラスで実
現される透光性基板５２の一方表面５２ａにも、第１の
実施例と同様にして、透明電極５３、絶縁層５４、ＥＬ
発光層５５、絶縁層５６、および透明電極５７がそれぞ
れこの順に積層して形成される。FIG. 4 shows an EL which is a second embodiment of the present invention.
6 is a cross-sectional view showing the structure of the element 41. FIG. The EL element 41 is
Transparent substrate 42, 52, transparent electrode 43, 47, 51, 5
3, 57, insulating layers 44, 46, 48, 50, 54, 5
6, EL light emitting layers 45, 49, 55, an adhesive 58 and an oil 59. For example, the transparent electrode 43, the insulating layer 44, the EL light emitting layer 45, the insulating layer 46, the transparent electrode 47, and the insulating layer are formed on the one surface 42a of the transparent substrate 42 made of glass in the same manner as in the first embodiment. 48, the EL light emitting layer 49, the insulating layer 50, and the transparent electrode 51 are laminated in this order. In addition, similarly to the first embodiment, the transparent electrode 53, the insulating layer 54, and the EL are also formed on the one surface 52a of the translucent substrate 52 which is also made of glass.
The light emitting layer 55, the insulating layer 56, and the transparent electrode 57 are laminated in this order.
【００４０】前記透明電極４３，４７、絶縁層４４，４
６およびＥＬ発光層４５は第１発光素子を構成し、透明
電極４７，５１、絶縁層４８，５０およびＥＬ発光層４
９は第２発光素子を構成し、透明電極５３，５７、絶縁
層５４，５６およびＥＬ発光層５５は第３発光素子を構
成している。すなわち、第１および第２発光素子の近接
する透明電極は、共有されている。The transparent electrodes 43 and 47, the insulating layers 44 and 4
6 and the EL light emitting layer 45 constitute the first light emitting element, and the transparent electrodes 47, 51, the insulating layers 48, 50 and the EL light emitting layer 4 are formed.
Reference numeral 9 constitutes a second light emitting element, and the transparent electrodes 53 and 57, the insulating layers 54 and 56, and the EL light emitting layer 55 constitute a third light emitting element. That is, the transparent electrodes adjacent to the first and second light emitting elements are shared.
【００４１】ＥＬ発光層４５，４９，５５が形成された
それぞれの基板４２，５２の一方表面４２ａ，５２ａ
は、互いに対向するように配置され、エポキシ樹脂など
で実現される接着剤５８で貼り合わせられた後、基板４
２，５２間に透光性を有するオイル５９が注入される。
前記透明電極４７，５３は、複数の帯状電極とされ、互
いに同じ方向となるように形成される。また、前記ＥＬ
発光層４５，４９，５５の発光色は、それぞれ赤色、緑
色、青色とされる。One surface 42a, 52a of each of the substrates 42, 52 on which the EL light emitting layers 45, 49, 55 are formed
Are arranged so as to face each other, and are bonded together with an adhesive 58 made of an epoxy resin or the like, and then the substrate 4
A light-transmitting oil 59 is injected between the two and 52.
The transparent electrodes 47 and 53 are a plurality of strip electrodes and are formed so as to have the same direction. In addition, the EL
The emission colors of the light emitting layers 45, 49 and 55 are red, green and blue, respectively.
【００４２】このような構成のＥＬ素子４１の透明電極
４３，４７，５１，５３，５７には、第１の実施例と同
じようにそれぞれの電極に図示しない電源が接続され
る。この際、電極５１，５７には同一の交流電圧が印加
されるので、同一の交流電圧を発生する電源をそれぞれ
接続してもよいし、１つの電源を共用して接続してもよ
い。The transparent electrodes 43, 47, 51, 53, 57 of the EL element 41 having such a structure are connected to respective power sources (not shown) as in the first embodiment. At this time, since the same AC voltage is applied to the electrodes 51 and 57, power supplies that generate the same AC voltage may be connected to each other, or one power supply may be shared and connected.
【００４３】前述した一般的なＥＬ素子２１は、図５に
示されるように基板２１の発光層が形成された表面２２
ａと、たとえば透光性を有する基板６１の一方表面とが
接着剤６２で貼り合わせられる。これは、ＥＬ素子２１
を機械的影響から保護し、また信頼性を確保するために
発光層を湿気から保護するためのものである。本実施例
のようなＥＬ素子４１の構成では、機械的影響から保護
することもできるし、またＥＬ発光層４５，４９，５５
を湿気から保護することも可能である。As shown in FIG. 5, the general EL element 21 described above has a surface 22 on which the light emitting layer of the substrate 21 is formed.
a and one surface of the substrate 61 having translucency, for example, are attached to each other with an adhesive 62. This is the EL element 21
To protect the light emitting layer from mechanical influences and to protect the light emitting layer from moisture in order to ensure reliability. In the structure of the EL element 41 as in this embodiment, it is possible to protect it from mechanical influences, and the EL light emitting layers 45, 49, 55.
It is also possible to protect the from moisture.
【００４４】ＥＬ素子４１の電極４３は、前記ＥＬ素子
１の電極１５に対応し、電極４７は電極１１に対応し、
電極５１，５７は電極７に対応し、電極５３は電極３に
対応している。このため、前記ＥＬ素子１と同様にし
て、電圧を印加することによって、ＥＬ発光層４５，４
９，５５を選択して発光させることが可能となる。The electrode 43 of the EL element 41 corresponds to the electrode 15 of the EL element 1, the electrode 47 corresponds to the electrode 11,
The electrodes 51 and 57 correspond to the electrode 7, and the electrode 53 corresponds to the electrode 3. Therefore, similarly to the EL element 1, by applying a voltage, the EL light emitting layers 45, 4
It is possible to select 9,55 to emit light.
【００４５】なお、本実施例でもＥＬ発光層４５，４
９，５５の発光色をそれぞれ赤、緑、青とする例につい
て説明したけれども、発光色はこれに限る必要はなく、
他の発光色とする例も本発明の範囲に属するものであ
る。また、積層順位もこれに限る必要はなく、他の順位
で積層してもかまわない。In this embodiment also, the EL light emitting layers 45, 4
The example in which the emission colors of 9, 55 are red, green, and blue has been described, but the emission colors are not limited to these.
Examples of other emission colors also belong to the scope of the present invention. Further, the stacking order is not limited to this, and the stacking may be performed in another order.
【００４６】図６は、前記ＥＬ素子１をバックライトと
して用いた液晶表示装置７１の構成を示す断面図であ
る。液晶表示装置７１は、バックライトであるＥＬ素子
１と液晶素子７８とを含んで構成される。ＥＬ素子１の
基板２であって、ＥＬ発光層５，９，１３が形成された
側の表面２ａとは反対側表面２ｂには、液晶素子７８が
形成される。液晶素子７８は、透光性基板２，７２と、
透明電極７３，７６と、配向膜７４，７７と、液晶層７
５とを含む。FIG. 6 is a sectional view showing the structure of a liquid crystal display device 71 using the EL element 1 as a backlight. The liquid crystal display device 71 includes an EL element 1 which is a backlight and a liquid crystal element 78. A liquid crystal element 78 is formed on the surface 2b of the substrate 2 of the EL element 1 which is opposite to the surface 2a on the side where the EL light emitting layers 5, 9, 13 are formed. The liquid crystal element 78 includes transparent substrates 2 and 72,
Transparent electrodes 73 and 76, alignment films 74 and 77, and liquid crystal layer 7
Including 5 and.
【００４７】基板２の表面２ｂには、たとえばＩＴＯで
実現される透明電極７３が形成される。透明電極７３
は、たとえばマトリクス状の複数の画素電極とされ、図
示しないＴＦＴ素子がそれぞれの画素に形成される。透
明電極７３上には、たとえばポリイミド樹脂で実現され
る配向膜７４が形成され、その表面はラビング処理など
によって配向処理されている。一方、基板７２の表面７
２ａのほぼ全面には、たとえばＩＴＯで実現される透明
電極７６が形成され、さらにその上には前記配向膜７４
と同様の配向膜７７が形成される。このような基板２の
表面２ｂと基板７２の表面７２ａとは対向するように配
置され、基板２，７２間には、たとえばネマティック液
晶で実現される液晶層７５が介在される。A transparent electrode 73 made of, for example, ITO is formed on the surface 2b of the substrate 2. Transparent electrode 73
Is a plurality of pixel electrodes in a matrix, for example, and TFT elements (not shown) are formed in each pixel. An alignment film 74 made of, for example, a polyimide resin is formed on the transparent electrode 73, and the surface thereof is subjected to alignment treatment by rubbing treatment or the like. On the other hand, the surface 7 of the substrate 72
A transparent electrode 76 made of, for example, ITO is formed on almost the entire surface of 2a, and the alignment film 74 is further formed thereon.
An alignment film 77 similar to the above is formed. The surface 2b of the substrate 2 and the surface 72a of the substrate 72 are arranged to face each other, and a liquid crystal layer 75 made of, for example, a nematic liquid crystal is interposed between the substrates 2 and 72.
【００４８】このような液晶素子７８の１画素には、Ｅ
Ｌ素子１の３本の帯状電極３，１１が対応し、３本の帯
状電極３，１１で分割されるＥＬ素子１の領域は、画像
信号に基づいてそれぞれ赤色、緑色、青色に発光する。
また、画像信号に基づいて、液晶素子７８の液晶層７５
の液晶分子の配向状態が制御され、図示しない偏光板に
よって入射光が透過／遮断される。このため、画像信号
に基づいたカラー表示を実施することが可能となる。One pixel of such a liquid crystal element 78 has E
Regions of the EL element 1 corresponding to the three strip-shaped electrodes 3 and 11 of the L element 1 and divided by the three strip-shaped electrodes 3 and 11 emit red, green and blue light based on the image signal, respectively.
Further, based on the image signal, the liquid crystal layer 75 of the liquid crystal element 78
The alignment state of the liquid crystal molecules is controlled, and incident light is transmitted / blocked by a polarizing plate (not shown). Therefore, it is possible to perform color display based on the image signal.
【００４９】図７は、前記ＥＬ素子４１をバックライト
として用いた液晶表示装置８１の構成を示す断面図であ
る。液晶表示装置８１は、バックライトであるＥＬ素子
４１と液晶素子８８とを含んで構成される。ＥＬ素子４
１の基板４２であって、ＥＬ発光層４５，４９，５５が
形成された側の表面４２ａとは反対側表面４２ｂには、
液晶素子８８が形成される。液晶素子８８は透光性基板
４２，８２と、透明電極８３，８６と、配向膜８４，８
７と、液晶層８５とを含み、これらの部材は、前記液晶
表示装置７１の透光性基板２，７２、透明電極７３，７
６、配向膜７４，７７および液晶層７５にそれぞれ対応
し、同様にして形成される。このような液晶素子８８の
１画素には、ＥＬ素子４１の１本の帯状電極４７，５３
が対応するように形成されている。FIG. 7 is a sectional view showing the structure of a liquid crystal display device 81 using the EL element 41 as a backlight. The liquid crystal display device 81 includes an EL element 41 which is a backlight and a liquid crystal element 88. EL element 4
In the substrate 42 of No. 1, the surface 42a opposite to the surface 42a on the side where the EL light emitting layers 45, 49, 55 are formed,
The liquid crystal element 88 is formed. The liquid crystal element 88 includes transparent substrates 42 and 82, transparent electrodes 83 and 86, and alignment films 84 and 8.
7 and a liquid crystal layer 85, these members being a transparent substrate 2 and 72, transparent electrodes 73 and 7 of the liquid crystal display device 71.
6, the alignment films 74 and 77, and the liquid crystal layer 75, respectively, and are formed in the same manner. One pixel of the liquid crystal element 88 has one strip electrode 47, 53 of the EL element 41.
Are formed to correspond.
【００５０】また、ＥＬ素子４１の電極５１，５７に
は、電源９１が接続され、電極４３には電源９３が接続
され、電極４７には電源９２が接続され、さらに電極５
３には電源９０が接続される。電源９０〜９３は、電源
１６〜１９に対応した交流電圧をそれぞれ発生する。A power supply 91 is connected to the electrodes 51 and 57 of the EL element 41, a power supply 93 is connected to the electrode 43, a power supply 92 is connected to the electrode 47, and the electrode 5 is further connected.
A power source 90 is connected to 3. The power supplies 90 to 93 generate AC voltages corresponding to the power supplies 16 to 19, respectively.
【００５１】続いて、液晶表示装置８１の領域Ｒを赤色
表示し、領域Ｇを緑色表示し、領域Ｂを青色表示する場
合について説明する。図８は、液晶表示装置８１のＥＬ
素子４１に印加する交流電圧を示す波形図である。図８
（１）は電極４３に印加する交流電圧波形を示し、図８
（２）は電極５１，５７に印加する交流電圧波形を示
す。また、図８（３）は領域Ｒの電極４７に印加する交
流電圧波形を示し、図８（４）は領域Ｇの電極４７に印
加する交流電圧波形を示し、図８（５）は領域Ｂの電極
４７に印加する交流電圧波形を示す。さらに、図８
（６）は領域Ｒの電極５３に印加する交流電圧波形を示
し、図８（７）は領域Ｇの電極５３に印加する交流電圧
波形を示し、図８（８）は領域Ｂの電極５３に印加する
交流電圧波形を示す。Next, the case where the region R of the liquid crystal display device 81 is displayed in red, the region G is displayed in green, and the region B is displayed in blue will be described. FIG. 8 shows an EL of the liquid crystal display device 81.
7 is a waveform diagram showing an AC voltage applied to the element 41. FIG. Figure 8
(1) shows an AC voltage waveform applied to the electrode 43.
(2) shows an AC voltage waveform applied to the electrodes 51 and 57. 8 (3) shows an AC voltage waveform applied to the electrode 47 in the region R, FIG. 8 (4) shows an AC voltage waveform applied to the electrode 47 in the region G, and FIG. 8 (5) shows a region B. 5 shows an AC voltage waveform applied to the electrode 47 of FIG. Furthermore, FIG.
8 (6) shows an AC voltage waveform applied to the electrode 53 in the region R, FIG. 8 (7) shows an AC voltage waveform applied to the electrode 53 in the region G, and FIG. The AC voltage waveform to apply is shown.
【００５２】このような電圧を印加すると、ＥＬ素子４
１の領域Ｒに対応する発光層４５には、Ｖ１＋Ｖ２の電
圧が印加されるので、発光層４５が赤色に発光する。ま
た、領域Ｇに対応する発光層４９にはＶ１＋Ｖ２の電圧
が印加されるので、発光層４９が緑色に発光する。さら
に、領域Ｂに対応する発光層５５にはＶ１＋Ｖ２の電圧
が印加されるので、発光層５５が青色に発光する。した
がって、ＥＬ素子４１に上記電圧を印加し、かつ液晶素
子８８の液晶層８５の液晶分子の配向状態を制御して入
射光が液晶層８５を透過するようにすれば、液晶表示装
置８１の領域Ｒ、Ｇ、Ｂをそれぞれ赤色、緑色、青色と
して表示することができる。When such a voltage is applied, the EL element 4
Since the voltage V1 + V2 is applied to the light emitting layer 45 corresponding to the region R of 1, the light emitting layer 45 emits red light. Further, since the voltage V1 + V2 is applied to the light emitting layer 49 corresponding to the region G, the light emitting layer 49 emits green light. Further, since the voltage V1 + V2 is applied to the light emitting layer 55 corresponding to the region B, the light emitting layer 55 emits blue light. Therefore, when the above voltage is applied to the EL element 41 and the alignment state of the liquid crystal molecules of the liquid crystal layer 85 of the liquid crystal element 88 is controlled so that the incident light passes through the liquid crystal layer 85, the area of the liquid crystal display device 81. R, G, and B can be displayed as red, green, and blue, respectively.
【００５３】また、液晶表示装置８１は、前記液晶表示
装置７１と同様にして液晶素子８８の１画素と、ＥＬ素
子４１の３本の帯状電極４７，５３とが対応するように
形成して画像信号に基づいたカラー表示を実施すること
も可能である。Similarly to the liquid crystal display device 71, the liquid crystal display device 81 is formed so that one pixel of the liquid crystal element 88 and three strip electrodes 47 and 53 of the EL element 41 correspond to each other. It is also possible to implement a color display based on the signal.
【００５４】なお、本実施例ではＴＦＴ素子を用いたア
クティブマトリクス駆動の場合について説明したけれど
も、これに限る必要はなく、たとえば単純マトリクス駆
動の場合も本発明の範囲に属するものである。また、液
晶層材料としてネマティック液晶を用いる例について説
明したけれども、これに限る必要はなく、たとえば強誘
電性液晶を用いる例も本発明の範囲に属するものであ
る。さらに、本実施例では製造が容易である帯状電極と
全面電極とを用いる例について説明したけれども、全て
の電極を帯状としても同様の効果が得られる。In the present embodiment, the case of active matrix driving using TFT elements has been described, but the present invention is not limited to this and, for example, simple matrix driving also falls within the scope of the present invention. Further, although the example in which the nematic liquid crystal is used as the liquid crystal layer material has been described, the invention is not limited to this, and an example in which the ferroelectric liquid crystal is used, for example, also belongs to the scope of the present invention. Further, although the example in which the strip electrode and the whole surface electrode which are easy to manufacture are used is described in the present embodiment, the same effect can be obtained even when all the electrodes are strip-shaped.
【００５５】[0055]
【発明の効果】以上のように本発明によれば、第１〜第
３発光素子の電極間に電圧を印加することによって異な
る色彩光が得られる。また、第１および第２発光素子の
近接する電極と、第２および第３発光素子の近接する電
極とが共有されるので、ＥＬ素子の厚みが薄くなる。さ
らに、近接する電極が共有されることによって、第１〜
第３発光素子をそのまま積層した場合と比べると、形成
する電極数が減少し、帯状電極の数は少なくとも２層と
なるので、製造工程が短縮化して製造コストが低減す
る。さらに、前記ＥＬ素子の電極には電源が接続され、
帯状電極に印加する交流電圧を切換えることによって異
なる色彩光を順次発光させることが可能となる。As described above, according to the present invention, different colored lights can be obtained by applying a voltage between the electrodes of the first to third light emitting elements. Further, since the adjacent electrodes of the first and second light emitting elements and the adjacent electrodes of the second and third light emitting elements are shared, the thickness of the EL element becomes thin. Furthermore, by sharing the adjacent electrodes,
Compared to the case where the third light emitting element is stacked as it is, the number of electrodes to be formed is reduced and the number of strip electrodes is at least two layers, so that the manufacturing process is shortened and the manufacturing cost is reduced. Further, a power source is connected to the electrodes of the EL element,
It is possible to sequentially emit different colored lights by switching the AC voltage applied to the strip electrodes.
【００５６】また本発明によれば、第１および第２発光
素子が形成された基板と、第３発光素子が形成された基
板とが、対向して貼合せられるので、第１〜第３発光素
子が外気から遮断されて湿気の影響が低減され、ＥＬ発
光層の安定性が向上して信頼性が向上する。また、前述
したのと同様に、ＥＬ素子の電極には電源が接続され、
帯状電極に印加する交流電圧を切換えることによって異
なる色彩光を順次発光させることが可能となる。Further, according to the present invention, the substrate on which the first and second light emitting elements are formed and the substrate on which the third light emitting element is formed are bonded so as to face each other. The element is shielded from the outside air, the influence of moisture is reduced, the stability of the EL light emitting layer is improved, and the reliability is improved. Further, similarly to the above, a power source is connected to the electrodes of the EL element,
It is possible to sequentially emit different colored lights by switching the AC voltage applied to the strip electrodes.
【００５７】さらに本発明によれば、液晶分子の配向状
態を制御して光を透過／遮断し、第１〜第３発光素子を
順次発光させることによって、異なる色彩の表示を行う
ことが可能となる。また、画像信号に基づいて第１〜第
３発光素子を選択的に発光させてカラー表示を行うこと
が可能となる。このため、カラーフィルタが不要とな
り、比較的低価格で表示装置を提供することが可能とな
る。Further, according to the present invention, it is possible to display different colors by controlling the alignment state of liquid crystal molecules to transmit / block light and sequentially emit light from the first to third light emitting elements. Become. Further, it is possible to perform color display by selectively causing the first to third light emitting elements to emit light based on the image signal. Therefore, a color filter is not required, and it is possible to provide a display device at a relatively low price.
【図１】本発明の第１の実施例であるＥＬ素子１の構成
を示す断面図である。FIG. 1 is a cross-sectional view showing a configuration of an EL element 1 which is a first embodiment of the present invention.
【図２】二重絶縁層構造の薄膜ＥＬ素子２１の構成を示
す断面図である。FIG. 2 is a cross-sectional view showing a configuration of a thin film EL element 21 having a double insulating layer structure.
【図３】前記ＥＬ素子１に印加する交流電圧を示す波形
図である。FIG. 3 is a waveform diagram showing an AC voltage applied to the EL element 1.
【図４】本発明の第２の実施例であるＥＬ素子４１の構
成を示す断面図である。FIG. 4 is a cross-sectional view showing a configuration of an EL element 41 which is a second embodiment of the present invention.
【図５】前記薄膜ＥＬ素子２１を示す断面図である。5 is a cross-sectional view showing the thin film EL element 21. FIG.
【図６】前記ＥＬ素子１をバックライトとして用いた液
晶表示装置７１の構成を示す断面図である。FIG. 6 is a cross-sectional view showing a configuration of a liquid crystal display device 71 using the EL element 1 as a backlight.
【図７】前記ＥＬ素子４１をバックライトとして用いた
液晶表示装置８１の構成を示す断面図である。FIG. 7 is a sectional view showing a configuration of a liquid crystal display device 81 using the EL element 41 as a backlight.
【図８】前記液晶表示装置８１のＥＬ素子４１に印加す
る交流電圧を示す波形図である。8 is a waveform diagram showing an AC voltage applied to an EL element 41 of the liquid crystal display device 81. FIG.
１，４１ ＥＬ素子 ２，４２，５２，７２，８２ 透光性基板 ３，７，１１，１５，４３，４７，５１，５３，５７，
７３，７６，８３，８６ 透明電極 ４，６，８，１０，１２，１４，４４，４６，４８，５
０，５４，５６ 絶縁層 ５，９，１３，４５，４９，５５ ＥＬ発光層 １６，１７，１８，１９，９０，９１，９２，９３ 電
源 ５８ 接着剤 ７１，８１ 液晶表示装置 ７４，７７，８４，８７ 配向膜 ７５，８５ 液晶層 ７８，８８ 液晶素子1,41 EL element 2,42,52,72,82 Translucent substrate 3,7,11,15,43,47,51,53,57,
73,76,83,86 transparent electrodes 4,6,8,10,12,14,44,46,48,5
0,54,56 Insulating layer 5,9,13,45,49,55 EL light emitting layer 16,17,18,19,90,91,92,93 Power supply 58 Adhesive 71,81 Liquid crystal display device 74,77, 84,87 Alignment film 75,85 Liquid crystal layer 78,88 Liquid crystal element
Claims (5)
彩光を発する第１〜第３発光素子がこの順に積層して形
成され、 各発光素子は、第１透明電極、絶縁層、ＥＬ発光層、絶
縁層および複数の帯状の第２透明電極をそれぞれこの順
に積層して成り、 前記第２発光素子の各構成部材の積層順位が第１および
第３発光素子の各構成部材の積層順位とは逆であり、前
記第１〜第３発光素子のそれぞれ近接する透明電極が共
有されていることを特徴とするＥＬ素子。1. A first to a third light emitting element which emits different colored lights are laminated in this order on an insulating substrate, and each light emitting element comprises a first transparent electrode, an insulating layer and an EL light emitting layer. , An insulating layer and a plurality of strip-shaped second transparent electrodes are stacked in this order, and the stacking order of the constituent members of the second light emitting element is the stacking order of the constituent members of the first and third light emitting elements. Reversely, the transparent electrodes adjacent to the first to third light emitting elements are shared, respectively.
第１透明電極に、前記ＥＬ発光層が発光する閾値電圧以
下の交流電圧を印加する第１電源と、 前記第３発光素子の第１透明電極に、前記閾値電圧以下
の交流電圧であって、前記第１電源の交流電圧の位相と
は逆の位相を有する交流電圧を印加する第２電源と、 前記第２および第３発光素子が共有する第２透明電極
に、前記閾値電圧の交流電圧を、前記第１および第２電
源による交流電圧の印加タイミングと同期させて印加す
る第３電源と、 前記第１発光素子の第２透明電極に、前記閾値電圧の交
流電圧であって、前記第１電源の交流電圧の位相とは逆
の位相を有する交流電圧を印加する第４電源とを備える
ことを特徴とする請求項１記載のＥＬ素子。2. A first power supply for applying an alternating voltage equal to or lower than a threshold voltage at which the EL light emitting layer emits light to a first transparent electrode shared by the first and second light emitting elements, and a third transparent electrode of the third light emitting element. A second power source for applying to the transparent electrode, an alternating voltage having an alternating voltage equal to or lower than the threshold voltage and having a phase opposite to a phase of the alternating voltage of the first power source; and the second and third light emitting elements. A third power source for applying the AC voltage of the threshold voltage to the second transparent electrode shared by the first and second power sources in synchronization with the application timing of the AC voltage by the first and second power sources; and the second transparent electrode of the first light emitting element. The fourth power supply for applying an AC voltage, which is the AC voltage of the threshold voltage and has a phase opposite to the phase of the AC voltage of the first power supply, to the electrode. EL element.
に異なる色彩光を発する第１および第２発光素子がこの
順に積層して形成され、前記一対の絶縁性基板の他方基
板上に、前記第１および第２発光素子とは異なる色彩光
を発する第３発光素子が形成され、 各発光素子は、第１透明電極、絶縁層、ＥＬ発光層、絶
縁層および複数の帯状の第２透明電極をそれぞれこの順
に積層して成り、 前記第２発光素子の各構成部材の積層順位が第１発光素
子の各構成部材の積層順位とは逆であり、前記第１およ
び第２発光素子の近接する透明電極が共有されており、 前記一対の絶縁性基板の発光素子が形成された側の表面
が、互いに対向するようにして貼り合わせられているこ
とを特徴とするＥＬ素子。3. A first light emitting element and a second light emitting element which emit different colored lights are laminated in this order on one substrate of the pair of insulating substrates, and on the other substrate of the pair of insulating substrates, A third light emitting element that emits different colored light from the first and second light emitting elements is formed, and each light emitting element includes a first transparent electrode, an insulating layer, an EL light emitting layer, an insulating layer and a plurality of strip-shaped second transparent electrodes. The electrodes are stacked in this order, and the stacking order of the constituent members of the second light emitting device is opposite to the stacking order of the constituent members of the first light emitting device, and the first and second light emitting devices are close to each other. The EL element is characterized in that the transparent electrodes are shared, and the surfaces of the pair of insulating substrates on the side where the light emitting elements are formed are bonded so as to face each other.
記ＥＬ発光層が発光する閾値電圧以下の交流電圧を印加
する第１電源と、 前記第３発光素子の第１透明電極に、前記第１電源と同
様の交流電圧を印加する第２電源と、 前記第１発光素子の第１透明電極に、前記閾値電圧以下
の交流電圧であって、前記第１および第２電源の交流電
圧の位相とは逆の位相を有する交流電圧を印加する第３
電源と、 前記第１および第２発光素子が共有する第２透明電極
に、前記閾値電圧の交流電圧を、前記第１および第３電
源による交流電圧の印加タイミングと同期させて印加す
る第４電源と、 前記第３発光素子の第２透明電極に、前記閾値電圧の交
流電圧であって、前記第２電源の交流電圧の位相とは逆
の位相を有する交流電圧を印加する第５電源とを備える
ことを特徴とする請求項３記載のＥＬ素子。4. A first power supply for applying an alternating voltage equal to or lower than a threshold voltage at which the EL light emitting layer emits light to a first transparent electrode of the second light emitting element, and a first transparent electrode of the third light emitting element, A second power supply that applies the same AC voltage as the first power supply, and a first transparent electrode of the first light emitting element, which has an AC voltage that is equal to or lower than the threshold voltage and that is the AC voltage of the first and second power supplies. Applying an alternating voltage having a phase opposite to that of
A fourth power supply for applying an AC voltage of the threshold voltage to a power supply and a second transparent electrode shared by the first and second light emitting elements in synchronization with the application timing of the AC voltage by the first and third power supplies. And a fifth power supply for applying to the second transparent electrode of the third light-emitting element an AC voltage having an AC voltage of the threshold voltage and having a phase opposite to the phase of the AC voltage of the second power supply. The EL device according to claim 3, further comprising:
形成された一対の透光性基板間に液晶層が介在され、 前記一対の透光性基板のいずれか一方基板側に、請求項
１または３記載のＥＬ素子が配置されていることを特徴
とする液晶表示装置。5. A liquid crystal layer is interposed between a pair of translucent substrates each having a transparent electrode and an alignment film formed in this order, and one of the pair of translucent substrates is provided on the substrate side. Alternatively, a liquid crystal display device, in which the EL element described in 3 is arranged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5090199A JPH06302383A (en) | 1993-04-16 | 1993-04-16 | El element and liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5090199A JPH06302383A (en) | 1993-04-16 | 1993-04-16 | El element and liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH06302383A true JPH06302383A (en) | 1994-10-28 |
Family
ID=13991820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5090199A Pending JPH06302383A (en) | 1993-04-16 | 1993-04-16 | El element and liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH06302383A (en) |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0905672A1 (en) * | 1997-09-30 | 1999-03-31 | Sharp Kabushiki Kaisha | Stacked display device and method of driving the same |
| US6264805B1 (en) | 1994-12-13 | 2001-07-24 | The Trustees Of Princeton University | Method of fabricating transparent contacts for organic devices |
| US6358631B1 (en) | 1994-12-13 | 2002-03-19 | The Trustees Of Princeton University | Mixed vapor deposited films for electroluminescent devices |
| US6365270B2 (en) | 1994-12-13 | 2002-04-02 | The Trustees Of Princeton University | Organic light emitting devices |
| KR100873220B1 (en) * | 2008-07-11 | 2008-12-10 | (주)탑나노시스 | A lighting display apparatus |
| JP2009229975A (en) * | 2008-03-25 | 2009-10-08 | Shinyosha:Kk | Electric bulletin display |
| JP2011023359A (en) * | 2010-09-07 | 2011-02-03 | Semiconductor Energy Lab Co Ltd | Light emitting device |
| US8368298B2 (en) | 2005-04-19 | 2013-02-05 | Semiconductor Energy Laboratory Co., Ltd. | Display device with multiple OLEDS |
| KR101407579B1 (en) * | 2007-09-17 | 2014-06-13 | 삼성디스플레이 주식회사 | Organic light emitting device and method of driving the same |
-
1993
- 1993-04-16 JP JP5090199A patent/JPH06302383A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6264805B1 (en) | 1994-12-13 | 2001-07-24 | The Trustees Of Princeton University | Method of fabricating transparent contacts for organic devices |
| US6358631B1 (en) | 1994-12-13 | 2002-03-19 | The Trustees Of Princeton University | Mixed vapor deposited films for electroluminescent devices |
| US6365270B2 (en) | 1994-12-13 | 2002-04-02 | The Trustees Of Princeton University | Organic light emitting devices |
| EP0808244B1 (en) * | 1994-12-13 | 2002-07-03 | The Trustees Of Princeton University | Multicolor organic light emitting devices |
| US6596134B2 (en) * | 1994-12-13 | 2003-07-22 | The Trustees Of Princeton University | Method of fabricating transparent contacts for organic devices |
| EP0905672A1 (en) * | 1997-09-30 | 1999-03-31 | Sharp Kabushiki Kaisha | Stacked display device and method of driving the same |
| US6278417B1 (en) | 1997-09-30 | 2001-08-21 | Sharp Kabushiki Kaisha | Method of driving a display device, and a display device |
| US8368298B2 (en) | 2005-04-19 | 2013-02-05 | Semiconductor Energy Laboratory Co., Ltd. | Display device with multiple OLEDS |
| KR101407579B1 (en) * | 2007-09-17 | 2014-06-13 | 삼성디스플레이 주식회사 | Organic light emitting device and method of driving the same |
| JP2009229975A (en) * | 2008-03-25 | 2009-10-08 | Shinyosha:Kk | Electric bulletin display |
| KR100873220B1 (en) * | 2008-07-11 | 2008-12-10 | (주)탑나노시스 | A lighting display apparatus |
| JP2011023359A (en) * | 2010-09-07 | 2011-02-03 | Semiconductor Energy Lab Co Ltd | Light emitting device |
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