JPS63247722A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPS63247722A JPS63247722A JP62079748A JP7974887A JPS63247722A JP S63247722 A JPS63247722 A JP S63247722A JP 62079748 A JP62079748 A JP 62079748A JP 7974887 A JP7974887 A JP 7974887A JP S63247722 A JPS63247722 A JP S63247722A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- cell
- light
- display device
- 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 69
- 210000002858 crystal cell Anatomy 0.000 claims abstract description 35
- 239000000758 substrate Substances 0.000 claims abstract description 14
- 239000004988 Nematic liquid crystal Substances 0.000 claims abstract description 9
- 238000005286 illumination Methods 0.000 claims description 10
- 210000004027 cell Anatomy 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 229910052736 halogen Inorganic materials 0.000 abstract description 3
- 150000002367 halogens Chemical class 0.000 abstract description 3
- 230000000007 visual effect Effects 0.000 abstract 1
- 230000010287 polarization Effects 0.000 description 9
- 239000010410 layer Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 5
- 239000003566 sealing material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 238000002834 transmittance Methods 0.000 description 3
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004642 Polyimide Substances 0.000 description 1
- 239000004372 Polyvinyl alcohol Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 229920000620 organic polymer Polymers 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 229920001721 polyimide Polymers 0.000 description 1
- 229920002451 polyvinyl alcohol Polymers 0.000 description 1
- 229920002050 silicone resin Polymers 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 229910052724 xenon Inorganic materials 0.000 description 1
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
Description
【発明の詳細な説明】
し産業上の利用分野］
本発明は、投影型表示を行なう液晶表示装置に関するも
のである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a liquid crystal display device that performs projection display.
［従来の技術］
従来、自動車の計器類、あるいはオーバーへッドブロジ
ェクタ用に液晶セルを光シヤツターとして用いて、投影
型表示装置を作る試みは多くなされてきた。しかし、従
来のネガ型液晶セルにおいては背は部分では液晶層に電
圧が印加されていないため、液晶分子がねじれており、
これに沿って光の偏光面がねじれ、一対の偏光膜の偏光
軸を並行させて配置することにより、背景部分で光が透
過しないようにされている。しかし、通常のこのネガ型
液晶表示装置の背景部分では、光は偏光面がねじれて進
むが、光の色によって屈折率が異なるため、ある程度特
定の色の光が透過してきてしまう問題点があった。単に
一対の偏光膜でその偏光軸を直交して配置した時と、偏
光軸を平行に配置した時との比（コントラスト比）は１
０００以上にもなる。しかし、通常のネガ型液晶表示装
置で、この間に液晶層を挟持した場合には、前述のごと
く、背景部分では光は偏光面がねじれて進むため、全て
の色で充分な偏光が得られなく、背景部分での光の漏れ
を生じ、これが問題となっていた。[Prior Art] Many attempts have been made to create projection-type display devices for automobile instruments or overhead projectors using liquid crystal cells as light shutters. However, in conventional negative-tone liquid crystal cells, no voltage is applied to the liquid crystal layer at the back, so the liquid crystal molecules are twisted.
The polarization plane of the light is twisted along this, and by arranging the polarization axes of the pair of polarizing films in parallel, light is prevented from passing through the background portion. However, in the background area of a normal negative-type liquid crystal display device, light travels with a twisted plane of polarization, but since the refractive index differs depending on the color of the light, there is a problem that a certain amount of light of a certain color may be transmitted through it. Ta. The ratio (contrast ratio) between simply placing a pair of polarizing films with their polarization axes perpendicular to that of placing them parallel is 1.
000 or more. However, in a normal negative type liquid crystal display device, when a liquid crystal layer is sandwiched between them, as mentioned above, the plane of polarization of the light propagates in the background area is twisted, making it impossible to obtain sufficient polarization for all colors. , which caused light leakage in the background area, which was a problem.
このため、この背景部分に遮光膜を形成し、背景部分の
光の漏れを防止することが提案されている。For this reason, it has been proposed to form a light shielding film on this background portion to prevent light leakage from the background portion.
しかし、単に背景部分の光の漏れをなくすために遮光膜
を設けた場合には、背景部分は暗くなるが、表示パター
ンの部分のうち、光が透過してこないようにされる非表
示パターンの部分では、光がある程度漏れてくるため前
述の背景部分と同じ問題を生じ、背景部分とこの非表示
パターン部分との暗さの比が大きくなると１本来光が透
過していないはずの部分を光が透過していると表示を見
誤゛る恐れが出てきた。However, if a light-shielding film is provided simply to eliminate light leakage from the background area, the background area will become dark, but the non-display pattern area, which prevents light from passing through the display pattern area, will darken the background area. The same problem as the background area mentioned above occurs because some light leaks through the area, and when the ratio of darkness between the background area and this non-display pattern area increases, 1. If the display was transparent, there was a risk of misreading the display.
［発明の解決しようとする問題点］
このように従来のネガ型液晶セルを用いて、前述のよう
な投影型表示装置を構成した場合、背景及び非表示パタ
ーン部分での光の漏れが目立ち、コントラストが充分で
ないという問題をも有していた。[Problems to be Solved by the Invention] When a projection type display device as described above is constructed using a conventional negative type liquid crystal cell, light leakage in the background and non-display pattern parts is noticeable. Another problem was that the contrast was insufficient.
［問題点を解決するための手段］
本発明は、かかる問題点を解決すべくなされたものであ
り、電極を設けた基板間にネマチック液晶層を挟持し、
表示パターンに対応する部分以外には遮光膜を設け、所
望の表示パターン以外の表示パターン部分の電極に前記
ネマチック液晶が励起する以上０電圧を印加する液晶セ
ルの両面に偏光膜の偏光軸を電圧無印加部分で光が透過
してくるように一対の偏光膜を配置し、さらにその後方
に照明手段を配置し、この照明手段と液晶セルとにより
作られる表示像を投影する面を前記液晶セルの前方に配
置したことを特徴とする液晶表示装置を提供するもので
ある。[Means for Solving the Problems] The present invention has been made to solve these problems, and includes a nematic liquid crystal layer sandwiched between substrates provided with electrodes,
A light-shielding film is provided in areas other than the areas corresponding to the display pattern, and a voltage of 0 voltage is applied to the electrodes of the display pattern area other than the desired display pattern so that the nematic liquid crystal is excited. A pair of polarizing films are arranged so that light passes through the non-applied area, and an illumination means is arranged behind them, and the surface on which the display image created by the illumination means and the liquid crystal cell is projected is the liquid crystal cell. The present invention provides a liquid crystal display device characterized in that it is disposed in front of a computer.
本発明は、背景部にすべて遮光膜を設け、表示パターン
部分でポジ表示型の駆動を行った液晶セルを投影型表示
装置として用いることにより、高コントラスト、高品位
かつ視野角依存性のない表示を生せしめることができる
。The present invention provides high-contrast, high-quality, and viewing-angle-independent display by using a liquid crystal cell as a projection display device, in which a light-shielding film is provided on all the background parts and positive display type driving is performed on the display pattern part. can be produced.
本発明を図面を参照しつつ説明する。The present invention will be explained with reference to the drawings.
第２図は、本発明の投影型液晶表示装置に用いる。ネガ
型表示のねじれネマチック液晶セルの基本的な例の断面
図を示す。FIG. 2 is used for the projection type liquid crystal display device of the present invention. 1 shows a cross-sectional view of a basic example of a twisted nematic liquid crystal cell with a negative tone display.
第２図において、ＩＡは基板であり、２Ａはその上に形
成された電極であり、さらにその上には配向膜３Ａが形
成されている。一方、他方の基板ＩＢには、その上に電
極２Ｂ、表示パターン以外の部分に遮光膜４、それらの
上に配向膜３Ｂが形成されている。これらの２枚の基板
の電極面が相対向するように配置して、周辺をシール材
５でシールし、内部にネマチック液晶を注入して液晶層
６を形成して液晶セルを形成する。In FIG. 2, IA is a substrate, 2A is an electrode formed thereon, and an alignment film 3A is further formed thereon. On the other hand, on the other substrate IB, an electrode 2B is formed, a light shielding film 4 is formed on a portion other than the display pattern, and an alignment film 3B is formed thereon. These two substrates are arranged so that their electrode surfaces face each other, their peripheries are sealed with a sealing material 5, and nematic liquid crystal is injected inside to form a liquid crystal layer 6 to form a liquid crystal cell.
この液晶セルの両面には、一対の偏光膜７Ａ、７Ｂが配
置され、その偏光軸は、通常のポジ型表示の液晶表示素
子の場合と同様に電圧を印加した部分で光が遮断される
ようにされている。A pair of polarizing films 7A and 7B are arranged on both sides of this liquid crystal cell, and the polarizing axis is set so that light is blocked at the part to which a voltage is applied, as in the case of a normal positive type liquid crystal display element. is being used.
具体的には、はぼ９０′のねじれになるように配向膜を
形成し、液晶の分子が電圧を印加しない状態でほぼ９０
°ねじれた状態にし、偏光膜の偏光軸は、それぞれの配
向方向と平行または直交するように配置すれば良い。即
ち、偏光膜の偏光軸は相互にほぼ９０°になるように配
置される。Specifically, the alignment film is formed so that it has a 90' twist, and the liquid crystal molecules twist approximately 90' when no voltage is applied.
The polarizing film may be placed in a twisted state so that the polarization axes of the polarizing films are parallel or perpendicular to the respective orientation directions. That is, the polarizing axes of the polarizing films are arranged at approximately 90° to each other.
もっとも、この配向方向を９０＠としても、液晶のねじ
れを９０＠でなく、２７０”や４５０’ としてもよい
し、配向方向を正確に９０°とせずに、８５°とか １
００°とかしてもよい。また、偏光軸と配向方向との角
度も平行または直交に限られなく、それから少しずらせ
て５°とか８５°とかしてもよい。However, even if this alignment direction is set to 90@, the twist of the liquid crystal may be set to 270'' or 450' instead of 90@, or the alignment direction may not be exactly 90° but 85° or 1
It may be 00°. Further, the angle between the polarization axis and the alignment direction is not limited to being parallel or perpendicular, but may be slightly shifted from that, such as 5° or 85°.
本発明で使用される基板は、ガラス、プラスチック等の
透明基板であれば良く、その内面には、ＩｎａＯ３−Ｓ
ｎＱａ （Ｉ Ｔ Ｏ） 、 ５ｎＯａ等の透明導電膜
による透明電極が形成されている。なお。The substrate used in the present invention may be a transparent substrate made of glass, plastic, etc., and the inner surface thereof is made of InaO3-S.
A transparent electrode is formed using a transparent conductive film such as nQa (ITO) or 5nOa. In addition.
この透明電極には、このほか金属や導電ペースト等によ
る低抵抗の導電性材料の膜が細線状、格子状等に形成さ
れていてもよい。In addition, a film of a low-resistance conductive material such as metal or conductive paste may be formed on the transparent electrode in the form of thin lines, a grid, or the like.
配向膜は、ポリイミド、ポリアミド、ポリビニルアルコ
ール等の有機高分子、ＳｉＯ□、ＴｉＯ２、Ａｌ２Ｏ５
等のＳ機材料による膜をラビングしたり、斜め蒸着した
りした液晶を配向させる配向膜であればよく、必要に応
じて、１層でも良いし、２層としてもよい。The alignment film is made of organic polymers such as polyimide, polyamide, polyvinyl alcohol, SiO□, TiO2, Al2O5
The alignment film may be any alignment film that aligns the liquid crystal, such as by rubbing a film made of an S-type material such as or diagonally depositing the film, and it may be one layer or two layers as required.
本発明の遮光膜は、液晶セルの内面に設けてもよいし、
外面に設けてもよく、その光透過率は０．０２〜１．０
％とされる。もつとも、液晶セルの内面側に遮光膜を形
成する方が斜め方向から見た場合に表示パターンと遮光
膜との位置ずれを生じにくく好ましい。The light shielding film of the present invention may be provided on the inner surface of the liquid crystal cell, or
It may be provided on the outer surface, and its light transmittance is 0.02 to 1.0.
%. However, it is preferable to form a light-shielding film on the inner surface of the liquid crystal cell because it is less likely to cause misalignment between the display pattern and the light-shielding film when viewed from an oblique direction.
シール材は、通常のエポキシ樹脂、シリコン樹脂等のシ
ール材でよく、通常はその一部に開口部を形成しておき
、セル化して後、その開口部から液晶を注入し、その開
口部を封止すればよい。The sealing material may be an ordinary sealing material such as epoxy resin or silicone resin. Usually, an opening is formed in a part of the sealing material, and after forming a cell, liquid crystal is injected through the opening. Just seal it.
注入する液晶は１通常のネマチック液晶でよく、通常は
ほぼ９０°のねじれを有しているが、前述の如く、２７
０°や４５０°ねじれとなるようにカイラル物質を添加
してあってもよい。The liquid crystal to be injected may be a normal nematic liquid crystal, which usually has a twist of about 90 degrees, but as mentioned above,
A chiral substance may be added to give a twist of 0° or 450°.
このほか、カラーフィルタ一層を基板の内面または外面
に形成したり、基板を偏光膜基板としたり、基板の外面
にタッチスイッチ、紫外線カツトフィルター、無反射フ
ィルターを積層したりしてもよく、本発明の効果を損し
ない範囲内で通常の液晶表示素子に適用しつる技術を適
用してもよい。In addition, a single layer of color filter may be formed on the inner or outer surface of the substrate, the substrate may be a polarizing film substrate, a touch switch, an ultraviolet cut filter, or a non-reflection filter may be laminated on the outer surface of the substrate. The technique applied to ordinary liquid crystal display elements may be applied within a range that does not impair the effects of the invention.
本発明では、全体としてはネガ型表示であるが、電極へ
の電圧の印加は、ポジ型表示と同様に行う。Although the present invention is a negative type display as a whole, voltage is applied to the electrodes in the same way as a positive type display.
即ち、液晶の光透過をさせたい部分には、電圧を印加し
なく、光を遮断したい部分に電圧な印加する。That is, no voltage is applied to the portions of the liquid crystal where it is desired to transmit light, but a voltage is applied to the portions where it is desired to block light.
第１図は本発明の液晶表示装置の基本的な全体的構成図
を示す。FIG. 1 shows a basic overall configuration diagram of a liquid crystal display device of the present invention.
第１図において１１は、第２図に示した液晶セルであり
、Ｉ２は照明手段、１３．１４は補助レンズ、１５は反
射鏡、１６は投影面である。In FIG. 1, 11 is the liquid crystal cell shown in FIG. 2, I2 is an illumination means, 13 and 14 are auxiliary lenses, 15 is a reflecting mirror, and 16 is a projection surface.
照明手段はハロゲンランプ、タングステンランプ、キセ
ノンランプ等の点光源、熱陰極放電管、冷陰極放電管等
の線光源、Ｅ Ｌ、ＣＲＴ等の面光源のいずれでもよい
し、レーザー光を用いてもよい。反射鏡は平面鏡、凸面
鏡、凹面鏡でもよいし、半透過反射鏡でもよい。The illumination means may be a point light source such as a halogen lamp, a tungsten lamp, or a xenon lamp, a line light source such as a hot cathode discharge tube or a cold cathode discharge tube, a surface light source such as an E L or CRT, or a laser beam may be used. good. The reflecting mirror may be a plane mirror, a convex mirror, a concave mirror, or a semi-transparent reflecting mirror.
このように反射鏡で投影面に反射表示させることにより
、狭い視角であっても充分使用でき、かつ液晶セルの配
置の自由度が増大する。In this way, by reflecting the display onto the projection surface using a reflecting mirror, it can be used satisfactorily even at a narrow viewing angle, and the degree of freedom in arranging the liquid crystal cell increases.
投影面は不透明な白色面、鏡面でもよいし、半透過反射
面でもよい。さらに特定方向からの特定波長入射光のみ
を効率よく反ｑ−１シ、他の光は透過するように処理し
たホログラム面でもよい。The projection surface may be an opaque white surface, a mirror surface, or a transflective surface. Furthermore, it may be a hologram surface that has been treated to efficiently reflect only incident light of a specific wavelength from a specific direction and transmit other light.
このように投影面に半透過反射面またはホログラムを用
いることにより、この液晶セルによる表示と他の表示若
しくは背景とを合成して表示することができる。このた
め自動用、航空機、船舶等のヘットアップディスプレー
等の外部も見え、表示も見える必要がある用途等に好適
である。By using a transflective surface or a hologram on the projection surface in this way, the display by this liquid crystal cell and other display or background can be combined and displayed. Therefore, it is suitable for applications such as head-up displays for automobiles, aircraft, ships, etc., where the outside can be seen and the display needs to be visible.
液晶セルと照明手段、反射鏡、投影面との位置関係は、
液晶セルの表示パターン部と非表示パターン部との光透
過重比が最も良くなる向きに光軸と液晶セルを傾ければ
よい。The positional relationship between the liquid crystal cell, illumination means, reflector, and projection surface is as follows:
The optical axis and the liquid crystal cell may be tilted in a direction that maximizes the light transmission weight ratio between the display pattern portion and the non-display pattern portion of the liquid crystal cell.
［作用］
本発明では液晶セルに任意の表示パターンが表示され、
この表示パターンが後方の照明手段により照明される。[Function] In the present invention, an arbitrary display pattern is displayed on the liquid crystal cell,
This display pattern is illuminated by rear illumination means.
従って液晶セルの前方には非常にコントラストの高い透
過表示像が生じ、これが反射鏡、補助レンズを通して投
影面にコントラストの高い像として投影される。Therefore, a very high-contrast transmission display image is generated in front of the liquid crystal cell, and this is projected as a high-contrast image onto the projection plane through the reflecting mirror and the auxiliary lens.
非常にコントラストの高い像が得られるのは液晶セルか
ら見て比較的狭い角度であるが、照明光から投影面への
光軸がこの角度内に入ってさえいれば投影像自体はどの
角度からもコントラストの高い像として観察できる。An extremely high contrast image can be obtained at a relatively narrow angle when viewed from the liquid crystal cell, but as long as the optical axis from the illumination light to the projection surface falls within this angle, the projected image itself can be viewed from any angle. can also be observed as a high-contrast image.
即ち、背景部分に遮光膜を設けるとともに、偏光膜をポ
ジ型液晶表示装置の場合と同様に、液晶に電圧を印加し
ない部分で光が透過してくるように配置し、表示パター
ンの駆動を光が透過しないようにする部分の液晶に電圧
を印加するようにすることにより、液晶に電圧を印加し
た部分では、液晶が立ち上がっているため、色による影
響がなく、一対の偏光膜をその偏光軸が直交するように
配置しておけば１、はぼ偏光膜の有する偏光性能を充分
に生かして高い遮光性が得られ、コントラスト比ｔｏｏ
ｏ以上というように高いものが得られる。In other words, a light-shielding film is provided in the background area, and a polarizing film is placed so that light passes through the areas where no voltage is applied to the liquid crystal, as in the case of positive-type liquid crystal display devices, and the drive of the display pattern is controlled by light. By applying a voltage to the liquid crystal in the part where the liquid crystal is not transmitted, the liquid crystal stands up in the part where the voltage is applied to the liquid crystal, so there is no effect of color, and the pair of polarizing films is aligned with its polarization axis. If they are arranged so that they are perpendicular to each other, the polarizing performance of the polarizing film can be fully utilized to obtain high light-shielding properties, and the contrast ratio is too high.
A high value such as o or more can be obtained.
このような液晶表示装置は斜め方向からみると非表示パ
ターン部分からの光のもれが発生しやすく、コントラス
トが低下しやすい。When such a liquid crystal display device is viewed from an oblique direction, light tends to leak from the non-display pattern portion, and the contrast tends to deteriorate.
しかし、本発明のように投影して表示させることにより
、液晶セルから投影面への光軸を狭くすることができ、
この液晶セルの有する狭視角という欠点を生じさせなく
、高いコントラストの表示ができることとなる。However, by projecting and displaying as in the present invention, the optical axis from the liquid crystal cell to the projection surface can be narrowed.
High contrast display can be achieved without the drawback of the narrow viewing angle of this liquid crystal cell.
［実施例］
実施例１
使用する液晶セルは第２図に示すような構成で、液晶と
してメルク社製ＺＬＩ−２９７８−０００，偏光膜とし
て日東電工社製Ｇ−１２２０Ｄｕ、セル間隙は ５．７
μｍとした。遮光膜はセル内面に形成し、カーボンイン
クによる印刷で光の透過率的０．３％とした。また、駆
動電圧はＩＯＶとした。[Example] Example 1 The liquid crystal cell used had a configuration as shown in Fig. 2, the liquid crystal was ZLI-2978-000 manufactured by Merck, the polarizing film was G-1220Du manufactured by Nitto Denko, and the cell gap was 5.7.
It was set as μm. A light shielding film was formed on the inner surface of the cell and printed with carbon ink to give a light transmittance of 0.3%. Further, the driving voltage was set to IOV.
全体構成は第１図に示すが、照明手段はハロゲンランプ
、反射鏡は平面鏡、投影面は反射率２５％、透過率７５
％の半透過反射面、補助レンズ１３．１４は凸レンズで
ある。The overall configuration is shown in Figure 1, where the illumination means is a halogen lamp, the reflecting mirror is a plane mirror, and the projection surface has a reflectance of 25% and a transmittance of 75%.
% transflective surface and auxiliary lenses 13 and 14 are convex lenses.
この実施例では、半透過反射面上に３００対１をこえる
コントラスト比を示す表示像が得られている。この例で
は、液晶セル上の表示情報とともに投影面後方も見通せ
るため、自動車、航空機のヘットアップディスプレイと
して応用可能である。In this example, a displayed image exhibiting a contrast ratio exceeding 300:1 is obtained on the transflective surface. In this example, since the information displayed on the liquid crystal cell and the rear of the projection surface can be seen, it can be applied as a head-up display for automobiles and aircraft.
実施例２
実施例１での構成を第３図のように変え、オーバーヘッ
トプロジェクタとして構成する。Embodiment 2 The configuration of Embodiment 1 is changed as shown in FIG. 3, and an overhead projector is constructed.
２１の投影面は不透明な白色面である。The projection surface 21 is an opaque white surface.
この実施例でも投影面において、視野角依存性のない、
高コントラストの表示が得られた。In this embodiment as well, on the projection plane, there is no viewing angle dependence.
A high contrast display was obtained.
［発明の効果］
本発明では、背景部に遮光膜を設け、かつ表示パターン
部分でポジ表示型の駆動をする液晶セルを用いて、投影
型の表示を行うことにより、視野角依存性のない非常に
高いコントラストの表示が実現できる。[Effects of the Invention] In the present invention, a light-shielding film is provided in the background part, and a projection type display is performed using a liquid crystal cell that drives a positive display type in the display pattern part, thereby eliminating viewing angle dependence. A very high contrast display can be achieved.
さらに液晶セルの内面あるいは外面に色フィルタを形成
することにより、カラー表示を行うことも可能である。Furthermore, by forming a color filter on the inner or outer surface of the liquid crystal cell, it is also possible to perform color display.
本発明による構成とすれば、表示像作成部としてＣＲＴ
等他の表示体を用いた場合に比べ、構成全体を小さくで
きる効果がある。If the configuration according to the present invention is adopted, a CRT is used as a display image creating section.
This has the effect that the entire configuration can be made smaller compared to the case where other display bodies such as the like are used.
本発明は、本発明の効果を損しない範囲内で公知の液晶
表示素子に使用されている種々の構成を付加してもよく
、今後柱々の応用が可能なものである。Various configurations used in known liquid crystal display elements may be added to the present invention within a range that does not impair the effects of the present invention, and various applications can be made in the future.
第１図は、本発明の基本的構成図である。
第２図は、本発明の表示装置に用いる液晶セルの基本的
例の断面図である。
第３図は、実施例２の構成図である。
基板： ＩＡ、ＩＢ 、 電極： ２Ａ、２Ｂ 。
配向膜： ３Ａ、３Ｂ 、 遮光膜：４゜シール材＝
５、 液晶層：６゜
偏光膜： ７Ａ、７Ｂ、 液晶セル＝１１照明手段：１
２、 補助レンズ： １３．１４．２２゜反射鏡＝１５
、 投影面： １６，２＋第１図
第２図
第 ３ 図
費−＼ノ″FIG. 1 is a basic configuration diagram of the present invention. FIG. 2 is a sectional view of a basic example of a liquid crystal cell used in the display device of the present invention. FIG. 3 is a configuration diagram of the second embodiment. Substrate: IA, IB, electrode: 2A, 2B. Alignment film: 3A, 3B, light shielding film: 4゜Sealing material =
5. Liquid crystal layer: 6° Polarizing film: 7A, 7B, Liquid crystal cell = 11 Lighting means: 1
2. Auxiliary lens: 13.14.22° reflector = 15
, Projection plane: 16,2 + Figure 1 Figure 2 Figure 3 Expenses -\ノ''
Claims (5)
、表示パターンに対応する部分以外には遮光膜を設け、
所望の表示パターン以外の表示パターン部分の電極に前
記ネマチック液晶が励起する以上の電圧を印加する液晶
セルの両面に偏光膜の偏光軸を電圧無印加部分で光が透
過してくるように一対の偏光膜を配置し、さらにその後
方に照明手段を配置し、この照明手段と液晶セルとによ
り作られる表示像を投影する面を前記液晶セルの前方に
配置したことを特徴とする液晶表示装置。(1) A nematic liquid crystal layer is sandwiched between substrates provided with electrodes, and a light-shielding film is provided in areas other than those corresponding to the display pattern.
A voltage higher than that which excites the nematic liquid crystal is applied to the electrodes of display pattern parts other than the desired display pattern.A pair of polarizing films are attached to both sides of the liquid crystal cell so that the polarizing axis of the polarizing film is set so that light passes through the part where no voltage is applied. A liquid crystal display device comprising: a polarizing film; an illumination means behind the polarizing film; and a surface onto which a display image formed by the illumination means and the liquid crystal cell is projected in front of the liquid crystal cell.
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 a mirror is disposed between the liquid crystal cell and the projection surface.
る特許請求の範囲第１項記載の液晶表示装置。(3) The liquid crystal display device according to claim 1, wherein a projection lens is disposed between the liquid crystal cell and the projection surface.
項記載の液晶表示装置。(4) Claim 1 in which the projection surface is a transflective surface
The liquid crystal display device described in Section 1.
記載の液晶表示装置。(5) The liquid crystal display device according to claim 1, wherein the projection surface is a hologram.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62079748A JPS63247722A (en) | 1987-04-02 | 1987-04-02 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62079748A JPS63247722A (en) | 1987-04-02 | 1987-04-02 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63247722A true JPS63247722A (en) | 1988-10-14 |
Family
ID=13698844
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62079748A Pending JPS63247722A (en) | 1987-04-02 | 1987-04-02 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63247722A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52122494A (en) * | 1976-04-08 | 1977-10-14 | Casio Comput Co Ltd | Display unit |
| JPS558947B2 (en) * | 1976-04-06 | 1980-03-06 | ||
| JPS60162227A (en) * | 1984-02-02 | 1985-08-24 | Asahi Glass Co Ltd | Twisted nematic liquid-crystal display device |
| JPS60169832A (en) * | 1984-02-15 | 1985-09-03 | Hitachi Ltd | Transmission type liquid-crystal display element |
| JPS6052775B2 (en) * | 1983-04-27 | 1985-11-21 | 石原水産株式会社 | Method for producing soft smoked fish products |
| JPS60249179A (en) * | 1984-05-25 | 1985-12-09 | 旭硝子株式会社 | Twisted nematic liquid crystal display |
| JPS6264638A (en) * | 1985-09-10 | 1987-03-23 | サン−ゴバン・ヴイトラ−ジユ | Front glass with reflector reflecting optical signal in visual field of driver |
-
1987
- 1987-04-02 JP JP62079748A patent/JPS63247722A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS558947B2 (en) * | 1976-04-06 | 1980-03-06 | ||
| JPS52122494A (en) * | 1976-04-08 | 1977-10-14 | Casio Comput Co Ltd | Display unit |
| JPS6052775B2 (en) * | 1983-04-27 | 1985-11-21 | 石原水産株式会社 | Method for producing soft smoked fish products |
| JPS60162227A (en) * | 1984-02-02 | 1985-08-24 | Asahi Glass Co Ltd | Twisted nematic liquid-crystal display device |
| JPS60169832A (en) * | 1984-02-15 | 1985-09-03 | Hitachi Ltd | Transmission type liquid-crystal display element |
| JPS60249179A (en) * | 1984-05-25 | 1985-12-09 | 旭硝子株式会社 | Twisted nematic liquid crystal display |
| JPS6264638A (en) * | 1985-09-10 | 1987-03-23 | サン−ゴバン・ヴイトラ−ジユ | Front glass with reflector reflecting optical signal in visual field of driver |
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