JPS62200326A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPS62200326A JPS62200326A JP61043606A JP4360686A JPS62200326A JP S62200326 A JPS62200326 A JP S62200326A JP 61043606 A JP61043606 A JP 61043606A JP 4360686 A JP4360686 A JP 4360686A JP S62200326 A JPS62200326 A JP S62200326A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- substrate
- layer
- light
- crystal cell
- 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 56
- 239000000758 substrate Substances 0.000 claims abstract description 48
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 25
- 239000011521 glass Substances 0.000 abstract description 12
- 239000010409 thin film Substances 0.000 abstract description 8
- 210000004027 cell Anatomy 0.000 abstract description 3
- 239000004988 Nematic liquid crystal Substances 0.000 abstract description 2
- 239000010408 film Substances 0.000 description 6
- XOLBLPGZBRYERU-UHFFFAOYSA-N tin dioxide Chemical compound O=[Sn]=O XOLBLPGZBRYERU-UHFFFAOYSA-N 0.000 description 5
- 239000005083 Zinc sulfide Substances 0.000 description 4
- 239000011572 manganese Substances 0.000 description 4
- 229910052984 zinc sulfide Inorganic materials 0.000 description 4
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 3
- 230000005684 electric field Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- BPUBBGLMJRNUCC-UHFFFAOYSA-N oxygen(2-);tantalum(5+) Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[Ta+5].[Ta+5] BPUBBGLMJRNUCC-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000005286 illumination Methods 0.000 description 2
- 229910052748 manganese Inorganic materials 0.000 description 2
- 230000005693 optoelectronics Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 125000006850 spacer group Chemical group 0.000 description 2
- PBCFLUZVCVVTBY-UHFFFAOYSA-N tantalum pentoxide Inorganic materials O=[Ta](=O)O[Ta](=O)=O PBCFLUZVCVVTBY-UHFFFAOYSA-N 0.000 description 2
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005669 field effect Effects 0.000 description 1
- 230000005283 ground state Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- -1 polarizing plate Substances 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 229910001887 tin oxide Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/1336—Illuminating devices
- G02F1/133602—Direct backlight
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本光明は、液晶表示装置に係り、特に、Ｅ １，１子と
液晶セルとを一体化した構造の液晶表示装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid crystal display device, and particularly to a liquid crystal display device having a structure in which an E1,1 element and a liquid crystal cell are integrated.
オプトエレクトロニクスの技術が急速に進むにつれて、
アクティブディスプレイのＬＥＤ素子に対応して、パッ
シブディスプレイの液晶が注目を浴びており、時計や電
卓等の小型電子橢器用表示素子として急速にその需要を
伸ばしてきている。As optoelectronic technology advances rapidly,
In response to LED elements in active displays, liquid crystal passive displays are attracting attention, and demand is rapidly increasing as display elements for small electronic devices such as watches and calculators.
液晶の電気光学効果には、いろいろな型があるが、例え
ば現在最も普及しているものの１つにねじれ角がほぼ９
０°のネマティック構造における電気光学効果を利用し
たいわゆる”Ｉｌｌ−ＦＥＭ（ｔｗｉｓｔｅｄ ｎｅＩ
Ｉａｔｉｃ ｆｉｅｌｄ ｅｆｆｅｃｔ ｍｏｄｅ ）
がある。There are various types of electro-optical effects in liquid crystals, but one of the most popular types at present is one with a twist angle of approximately 9.
The so-called "Ill-FEM (twisted neI
Iatic field effect mode)
There is.
これは、ねじれ配向させた液晶セルに対して外場（電界
あるいは磁場等）を印加又は除去するに際して、液晶分
子に配列変化が起こり、これによって光に対する趨光性
の有無が生じめ現象を利用したものである。This method utilizes the phenomenon that when an external field (electric field, magnetic field, etc.) is applied to or removed from a twistedly oriented liquid crystal cell, alignment changes occur in the liquid crystal molecules, which causes the light to have a focusing property or not. It is.
実際には、ＴＮ−ＦＥＭ構造の液晶セルを用いた表示装
置は、例えば、第３図に示す如く、スペ−サＳによって
所定の間隔を形成するように相対向して配設されたｆｆ
１１および第２のガラス基板１２．１３上に、夫々配置
層１１と互いにラビング方向が直交するようにｇＪ５１
および第２の配向層１４．１５が形成され、この第１お
よび第２の配向層１４．１５の間に液晶層１６が配され
ている。In actuality, a display device using a liquid crystal cell having a TN-FEM structure is, for example, as shown in FIG.
11 and the second glass substrate 12 and 13, gJ51 is placed on the arrangement layer 11 and the second glass substrate 12, 13 so that the rubbing directions are perpendicular to each other.
and a second alignment layer 14.15 are formed, and a liquid crystal layer 16 is arranged between the first and second alignment layers 14.15.
またこの第１および第２のガラス基板の外側に１対の偏
光板が配されることもある。Further, a pair of polarizing plates may be arranged outside the first and second glass substrates.
そして、通常バックライト１０と称されているＥＥＬ素
子等からなる照明手段が裏面側の第２のガラス基板１３
の後方に配され、このバックライト旦からの光が、配４
１層１１を通して印加される電場に′よる液晶層の配向
性の変化に起因して液晶セルを透過するか否かによって
表示がなされる訳である。Illumination means consisting of an EEL element or the like, which is usually called a backlight 10, is provided on a second glass substrate 13 on the back side.
The light from this backlight is placed behind the
Display is performed depending on whether or not the light passes through the liquid crystal cell due to changes in the orientation of the liquid crystal layer due to the electric field applied through the first layer 11.
このＥＬ素子としては、通常、透光性の基板１８上に酸
化錫（ＳｎＯ２）層等からなる透明電極１９と、第１の
誘電体層２ｏと、硫化亜鉛（ＺｎＳ）：マンガン（Ｍｎ
）ｉＪ膜からなる発光層２１と、第２の誘電体層２２と
、アルミニウム（Ａｊ）層等からなる背面電極２３とが
順次１層せしめられた２重誘電体構造をとるものが多い
。This EL element usually includes a transparent electrode 19 made of a tin oxide (SnO2) layer or the like on a transparent substrate 18, a first dielectric layer 2o, and a zinc sulfide (ZnS):manganese (MnS) layer.
) Many of them have a double dielectric structure in which a light emitting layer 21 made of an iJ film, a second dielectric layer 22, and a back electrode 23 made of an aluminum (Aj) layer or the like are sequentially formed.
このようなＥＬ素子では、該透明電極と該背面電極との
間に電圧を印加することによって発光層内に誘起された
電界により界面準位にトラップされていた電子が引き出
されて加速され充分なエネルギーを得、この電子が発光
中心（Ｍｎ）の軌道電子に衝突しこれを励起し、この励
起された発光中心が基底状態に戻る際に発光が起る。In such an EL element, by applying a voltage between the transparent electrode and the back electrode, electrons trapped in the interface state are extracted and accelerated by an electric field induced in the light emitting layer, and a sufficient amount of energy is generated. Energy is obtained, and these electrons collide with orbital electrons of the luminescent center (Mn) to excite them, and light emission occurs when the excited luminescent center returns to its ground state.
このような従来の液晶表示装置では、液晶セルの裏面側
に、別体として、ＥＬ素子等のバックライトを配置した
構造であるため、液晶セルとバンクライトとの１１に空
間およびガラス基板の中間層等がある。偏光板を介在さ
せたような場合には更に空間および中間層が増えること
にもなる。このような空間および中間層の存在は、発光
層からの光を散乱、吸収、反射するため光の減衰が大き
く、バックライトからの光を十分に利用することができ
ずコントラストが十分でないという問題があった。In such a conventional liquid crystal display device, a backlight such as an EL element is placed separately on the back side of the liquid crystal cell, so there is a space between the liquid crystal cell and the bank light and a space between the glass substrate. There are layers, etc. If a polarizing plate is interposed, the number of spaces and intermediate layers will further increase. The existence of such spaces and intermediate layers scatters, absorbs, and reflects light from the light-emitting layer, resulting in large attenuation of light, which makes it impossible to fully utilize the light from the backlight, resulting in insufficient contrast. was there.
本発明は前記実情に鑑みてなされたもので、コントラス
トの高い液晶表示装置を提供することを目的とする。The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide a liquid crystal display device with high contrast.
そこで本発明では、液晶セルの背面側の基板上にＥＬ素
子を配設し、液晶セルと照明用のＥＬ素子を一体化する
ようにしている。Therefore, in the present invention, an EL element is disposed on a substrate on the back side of a liquid crystal cell, so that the liquid crystal cell and the EL element for illumination are integrated.
（作 用）
すなわち、ＥＬ素子の発光層と液晶層との間には例えば
１枚の基板が存在するのみであり、液晶セルとバックラ
イト（ＥＬ素子）との間に介在していた空間、ガラス等
を全て省くことができ、ＥＬ素子の発光層からの光は液
晶セルに直接入光する。(Function) That is, for example, only one substrate exists between the light emitting layer of the EL element and the liquid crystal layer, and the space that was interposed between the liquid crystal cell and the backlight (EL element) Glass and the like can be completely omitted, and light from the light emitting layer of the EL element directly enters the liquid crystal cell.
従って光の減衰が大幅に低減され、コントラストが高め
られ表示品質の高い液晶表示装置を得ることができる。Therefore, it is possible to obtain a liquid crystal display device in which light attenuation is significantly reduced, contrast is increased, and display quality is high.
（実施例）
以下、本発明の実施例について図面を参照しつつ訂細に
説明する。(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
第１図は、本発明実施例の液晶表示装置を示す図である
。FIG. 1 is a diagram showing a liquid crystal display device according to an embodiment of the present invention.
この液晶表示装置は、ガラスからなる裏面基板１の表面
側に形成された液晶セル１００と裏面側に形成された薄
膜ＥＬ素子２００とから構成されている。This liquid crystal display device includes a liquid crystal cell 100 formed on the front side of a back substrate 1 made of glass and a thin film EL element 200 formed on the back side.
該液晶セル１００は表面に配線層１０２ａおよび配向Ｗ
Ｊ１０３ａの形成された裏面基板１と、同様に表面に配
置層１０２ｂ１配向ＩＩ １０３ ｂの形成されたガラ
スからなる表面基板１０４とがスペーサ１０５を介して
所定の間隔で相対向して配設されてなり、これらの間に
形成された空間にネマティック型液晶層１０６が注入さ
れている。The liquid crystal cell 100 has a wiring layer 102a and an orientation W on the surface.
The back substrate 1 on which J103a is formed and the front substrate 104 made of glass on which the arrangement layer 102b1 orientation II 103b is similarly formed are arranged facing each other at a predetermined interval with a spacer 105 in between. A nematic liquid crystal layer 106 is injected into the space formed between them.
また、前記薄膜ＥＬ素子２００は、前記裏面基板１上に
膜厚０．３μｍの酸化＠（ＳｎＯ２）層からなる透明電
極２０１、膜厚０．５μｍの五酸化タンタル（Ｔａ２０
５）層からなる第１の誘電体層２０２、膜厚０．５層ｍ
の硫化亜鉛（ＺｎＳ）：マンガン（Ｍｎ）層からなる発
光層２０３、膜厚０．５μｍの五酸化タンタル層からな
る第２の誘電体層２０４、膜厚０．５μｍのアルミニウ
ム薄膜からなる背面電極０５とが順次Ｖ４層ゼしめられ
て構成されており、発光層２０３で生起された光は表面
基板１を介して液晶層に入射し、液晶層の配向性に応じ
て、表面基板１０４へと光が導かれるようになっている
。２０６は保護膜である。The thin film EL element 200 also includes a transparent electrode 201 made of a 0.3 μm thick oxide@(SnO2) layer on the back substrate 1, a tantalum pentoxide (Ta20) layer of 0.5 μm thick,
5) First dielectric layer 202 consisting of layers, film thickness 0.5 m
A light emitting layer 203 made of a zinc sulfide (ZnS):manganese (Mn) layer, a second dielectric layer 204 made of a tantalum pentoxide layer with a thickness of 0.5 μm, and a back electrode made of a thin aluminum film with a thickness of 0.5 μm. The light generated in the light emitting layer 203 enters the liquid crystal layer via the front substrate 1, and is transmitted to the front substrate 104 according to the orientation of the liquid crystal layer. Light is being guided. 206 is a protective film.
製造に際しては、まず裏面基板１の裏面側に通常の薄膜
テクノロジーによって薄膜ＥＬ素子２００を形成する。In manufacturing, first, the thin film EL element 200 is formed on the back side of the back substrate 1 using normal thin film technology.
次いで、該裏面基板の表面側に透光性の配線層１０２ａ
および配向層１０３ａを形成すると共に、表面基板１０
４としてのガラス基板上に透光性の配線層１０２ｂおよ
びおよび配向１！１０３ｂを形成した後、各配向層に対
し夫々ラビングを行なう。Next, a transparent wiring layer 102a is formed on the front side of the back substrate.
and the alignment layer 103a, and the surface substrate 10
After forming the transparent wiring layer 102b and the orientation 1!103b on the glass substrate No. 4, each orientation layer is rubbed.
続いてスペーサ１０５を介して、前記裏面基板１と前記
表面基板１０４とを貼着する。Subsequently, the back substrate 1 and the front substrate 104 are attached to each other with spacers 105 interposed therebetween.
そして最後に、液晶１０６を注入し、注入孔を封止して
第１図に示した液晶表示装置が形成される。Finally, liquid crystal 106 is injected and the injection hole is sealed to form the liquid crystal display device shown in FIG.
このようにして形成された液晶表示装置では、バックラ
イトとしての薄膜ＥＬｊｌ子２００からの光が直接液晶
セルに入射するようになっているため光の減衰が楊めて
小さく抑制され、良好に外側に導かれるため、コントラ
ストが高く表示品質の高いものとなっている。In the liquid crystal display device formed in this manner, the light from the thin film EL device 200 serving as a backlight is directly incident on the liquid crystal cell, so that the attenuation of light is suppressed to a very small level, and the outside , the contrast is high and the display quality is high.
なお、実施例では、ネマチック型液晶を用いたが、これ
ら限定されることなく他の型のものを用いてもよいこと
はいうまでもない。また、表示モードについても何ら実
施例に限定されるものではない。In the embodiment, a nematic type liquid crystal was used, but it goes without saying that other types of liquid crystals may be used without being limited to these. Furthermore, the display mode is not limited to the embodiment.
また、液晶セルを形成する表面基板および裏面基板を偏
光板で構成するようにしてもよい。これは、薄膜ＥＬ素
子と一体化することなく液晶を独立して形成する場合に
も有効である。Further, the front substrate and the back substrate forming the liquid crystal cell may be constructed of polarizing plates. This is also effective when forming the liquid crystal independently without integrating it with the thin film EL element.
例えば、第２図に示す如く、裏面基板３０１および表面
基板３０２を、夫々第１の偏光板と第１の偏光板に対し
て所定の角度をもつ偏光軸を有する第２の偏光板とで構
成するようにしてもよい。For example, as shown in FIG. 2, the back substrate 301 and the front substrate 302 are each composed of a first polarizing plate and a second polarizing plate having a polarization axis at a predetermined angle with respect to the first polarizing plate. You may also do so.
かかる構成をとることにより、裏面基板および表面基板
に夫々偏光板を貼着したＩＩ４造の液晶セルに比べて、
製造が容易となる。By adopting this configuration, compared to the II4 type liquid crystal cell in which polarizing plates are attached to the back substrate and the front substrate, respectively,
Manufacturing becomes easier.
また、従来のセルの不良原因であった表面基板および裏
面基板と偏光板の富者不良および接着剤の劣化による不
良がなくなり信頼性が向上する上、基板面での光の散乱
、反射、吸収がなくなり表示品質が向上する。In addition, reliability is improved by eliminating defects in the front substrate, back substrate, polarizing plate, and adhesive deterioration, which were causes of defects in conventional cells. The display quality is improved.
更にまた、実施例の裏面基板および表示基板に代えて、
ガラス基板と所望の偏光軸を有する偏光板とを重ね合わ
せてなる二層構造の基板を用いてもよい。この場合は裏
面基板の後方に被着された偏光板上にｉ［ＥＬ素子が作
り込まれることになる。製造に際しては、出発材料を裏
面基板上に偏光板を貼着したものとし実施例と同様に形
成してもよいが、偏光板上にＩｌ膜ＥＬ素子を形成する
一方で、裏面基板上に液晶セルを形成し、＠後に裏面基
板と偏光板とを貼着するようにしてもよい。Furthermore, instead of the back substrate and display substrate of the embodiment,
A substrate with a two-layer structure formed by laminating a glass substrate and a polarizing plate having a desired polarization axis may be used. In this case, the i[EL element will be built on the polarizing plate attached to the rear of the back substrate. In manufacturing, the starting material may be a polarizing plate adhered to the back substrate and formed in the same manner as in the example, but while the Il film EL element is formed on the polarizing plate, the liquid crystal A cell may be formed, and then the back substrate and the polarizing plate may be attached.
以上説明してきたように、本発明によれば、液晶セルと
εＬ素子とを同一基板の両面に形成し、一体化している
ため、Ｅし素子からの光が有効に液晶セルに導かれ、表
示品質の高い液晶表示＠置を提供することができる。As explained above, according to the present invention, the liquid crystal cell and the εL element are formed on both sides of the same substrate and are integrated, so that light from the εL element is effectively guided to the liquid crystal cell and displayed. It is possible to provide a high quality liquid crystal display.
第１図は、本発明実施例の液晶表示装置を示す図、第２
図は、液晶セルを示す図、第３図は、従来例の液晶表示
装置を示す図である。
１．１２・・・裏面基板、１１，１０２ａ、１０２ｂ−
・・配置１ＡＭ１１４．１５，１０３ａ、１０３ｂ・・
・配向層、１３，１０４・・・表面基板、１６．１０６
・・・液晶層、１００・・・液晶セル、−り旦、２００
・・・薄膜ＥＬ素子、１８・・・ガラス基板、１９．２
０１・・・透明電極、２０，２０２・・・第１の誘電体
層、２１゜２０３・・・発光層、２２，２０４・・・第
２の誘電体層、２３，２０５・・・背面電極、２０６・
・・保護膜、３０１．３０２・・・偏光板。FIG. 1 is a diagram showing a liquid crystal display device according to an embodiment of the present invention, and FIG.
This figure shows a liquid crystal cell, and FIG. 3 shows a conventional liquid crystal display device. 1.12... Back substrate, 11, 102a, 102b-
...Arrangement 1AM114.15, 103a, 103b...
・Orientation layer, 13,104...Surface substrate, 16.106
...Liquid crystal layer, 100...Liquid crystal cell, -ritan, 200
...Thin film EL element, 18...Glass substrate, 19.2
01...Transparent electrode, 20,202...First dielectric layer, 21°203...Light emitting layer, 22,204...Second dielectric layer, 23,205...Back electrode , 206・
...Protective film, 301.302...Polarizing plate.
Claims (2)
に形成されていることを特徴とする液晶表示装置。(1) A liquid crystal display device comprising: a liquid crystal cell; and a light emitting means made of an EL element, wherein the EL element is integrally formed on a substrate on the back side of the liquid crystal cell. Display device.
の基板が偏光板から構成されていることを特徴とする特
許請求の範囲第１項記載の液晶表示装置。(2) The liquid crystal display device according to claim 1, wherein the display side and back side substrates sandwiching the liquid crystal layer of the liquid crystal cell are composed of polarizing plates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61043606A JPS62200326A (en) | 1986-02-28 | 1986-02-28 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61043606A JPS62200326A (en) | 1986-02-28 | 1986-02-28 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62200326A true JPS62200326A (en) | 1987-09-04 |
Family
ID=12668485
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61043606A Pending JPS62200326A (en) | 1986-02-28 | 1986-02-28 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62200326A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2666676A1 (en) * | 1990-09-12 | 1992-03-13 | Smiths Industries Plc | LIQUID CRYSTAL DISPLAY DEVICE WITH FLUORESCENT LAMP. |
| JPH07301799A (en) * | 1994-05-10 | 1995-11-14 | Seikosha Co Ltd | El for back light of liquid crystal |
| US5703666A (en) * | 1991-08-29 | 1997-12-30 | Canon Kabushiki Kaisha | Electroluminescent device for illuminating a liquid crystal display |
| JP2001166301A (en) * | 1999-12-06 | 2001-06-22 | Seiko Epson Corp | Liquid crystal display device with built-in back light and method of manufacture |
-
1986
- 1986-02-28 JP JP61043606A patent/JPS62200326A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2666676A1 (en) * | 1990-09-12 | 1992-03-13 | Smiths Industries Plc | LIQUID CRYSTAL DISPLAY DEVICE WITH FLUORESCENT LAMP. |
| US5703666A (en) * | 1991-08-29 | 1997-12-30 | Canon Kabushiki Kaisha | Electroluminescent device for illuminating a liquid crystal display |
| JPH07301799A (en) * | 1994-05-10 | 1995-11-14 | Seikosha Co Ltd | El for back light of liquid crystal |
| JP2001166301A (en) * | 1999-12-06 | 2001-06-22 | Seiko Epson Corp | Liquid crystal display device with built-in back light and method of manufacture |
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