JPS5819719B2 - liquid crystal display device - Google Patents

liquid crystal display device

Info

Publication number
JPS5819719B2
JPS5819719B2 JP4537873A JP4537873A JPS5819719B2 JP S5819719 B2 JPS5819719 B2 JP S5819719B2 JP 4537873 A JP4537873 A JP 4537873A JP 4537873 A JP4537873 A JP 4537873A JP S5819719 B2 JPS5819719 B2 JP S5819719B2
Authority
JP
Japan
Prior art keywords
liquid crystal
crystal display
display device
homeotropic
homeotropic structure
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.)
Expired
Application number
JP4537873A
Other languages
Japanese (ja)
Other versions
JPS49130378A (en
Inventor
森山明男
深井正一
浅井公明
竜田博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Priority to JP4537873A priority Critical patent/JPS5819719B2/en
Priority to CA197,164A priority patent/CA1029940A/en
Priority to GB1601574A priority patent/GB1441541A/en
Priority to US460874A priority patent/US3919106A/en
Priority to FR7413533A priority patent/FR2226718B1/fr
Priority to DE742419011A priority patent/DE2419011C3/en
Publication of JPS49130378A publication Critical patent/JPS49130378A/ja
Publication of JPS5819719B2 publication Critical patent/JPS5819719B2/en
Expired legal-status Critical Current

Links

Classifications

    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00Liquid crystal materials
    • C09K19/04Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06Non-steroidal liquid crystal compounds
    • C09K19/08Non-steroidal liquid crystal compounds containing at least two non-condensed rings
    • C09K19/10Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings
    • C09K19/22Non-steroidal liquid crystal compounds containing at least two non-condensed rings containing at least two benzene rings linked by a chain containing carbon and nitrogen atoms as chain links, e.g. Schiff bases
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00Liquid crystal materials
    • C09K19/04Liquid crystal materials characterised by the chemical structure of the liquid crystal components, e.g. by a specific unit
    • C09K19/06Non-steroidal liquid crystal compounds
    • C09K19/062Non-steroidal liquid crystal compounds containing one non-condensed benzene ring
    • CCHEMISTRY; METALLURGY
    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K19/00Liquid crystal materials
    • C09K19/52Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
    • C09K19/54Additives having no specific mesophase characterised by their chemical composition

Landscapes

  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Liquid Crystal Substances (AREA)
  • Devices For Indicating Variable Information By Combining Individual Elements (AREA)

Description

【発明の詳細な説明】 本発明は液晶を用いた表示装置に関するもので、特にネ
マチック液晶にホメオトロピック組織を与えるための新
規な添加剤に関する。
DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a display device using a liquid crystal, and more particularly to a novel additive for imparting a homeotropic structure to a nematic liquid crystal.

第1図はこの種液晶表示装置の概略の構造を示すもので
ある。
FIG. 1 shows a schematic structure of this type of liquid crystal display device.

図において、1,2はガラス基板で、基板1と2との間
隙は電気絶縁性スペーサ3を介して、数ミクロン−数1
0ミクロンに保たれている。
In the figure, 1 and 2 are glass substrates, and the gap between the substrates 1 and 2 is from several microns to several 1 through an electrically insulating spacer 3.
It is maintained at 0 microns.

ガラス基板1の内面には、例えば酸化スズ、酸化インジ
ウムを主体とした薄膜状透明導電膜4、ガラス基板2の
内面には導電性薄膜5、例えば酸化スズ、酸化インジウ
ムを主体とした薄膜状透明導電膜、もしくは金属蒸着薄
膜、もしくは誘電体ミラーを伴った薄膜状透明導電膜、
またはそれらの変形された導電膜がそれぞれ設けられて
いる。
The inner surface of the glass substrate 1 is coated with a thin transparent conductive film 4 mainly made of tin oxide or indium oxide, and the inner surface of the glass substrate 2 is coated with a conductive thin film 5 such as a thin transparent film mainly made of tin oxide or indium oxide. Conductive film, metal vapor deposited thin film, or thin transparent conductive film with dielectric mirror,
Alternatively, modified conductive films thereof are provided.

ガラス基板1と2の間、換言すれば薄膜状電極4と5の
間に液晶6が介在している。
A liquid crystal 6 is interposed between the glass substrates 1 and 2, in other words, between the thin film electrodes 4 and 5.

液晶6には外部電源7より電極4と5を通じて電圧を印
加し、外部光8を変調して表示するものである。
A voltage is applied to the liquid crystal 6 from an external power supply 7 through the electrodes 4 and 5, and external light 8 is modulated for display.

第2図にはガラス基板1,2と液晶分子9および本発明
による添加剤10との相対的位置関係を示している。
FIG. 2 shows the relative positional relationship between the glass substrates 1 and 2, the liquid crystal molecules 9, and the additive 10 according to the invention.

この添加剤を加えることにより、第2図に示すように液
晶分子の長軸はガラス基板1および2の表面に垂直に配
列するようになる。
By adding this additive, the long axes of liquid crystal molecules are aligned perpendicular to the surfaces of glass substrates 1 and 2, as shown in FIG.

この液晶の組織はホメオトロピック組織として知られて
いる。
This liquid crystal structure is known as a homeotropic structure.

ホメオトロピック組織になっているかどうかは液晶表示
装置の前面および後面に直線偏光板11゜12を置き、
これら直線偏光板の偏光方向を直交して配置すると、液
晶表示装置内の液晶組織がホメオトロピック組織である
と、入射光13は観測者14にはほとんど到達しないこ
とで判断できる。
To check whether the liquid crystal display has a homeotropic structure, place linear polarizing plates 11 and 12 on the front and rear surfaces of the liquid crystal display.
When the polarization directions of these linear polarizers are arranged perpendicularly to each other, it can be determined that the liquid crystal structure in the liquid crystal display device is a homeotropic structure because the incident light 13 hardly reaches the observer 14.

ホメオトロピック組織を用いる液晶表示の方法としては (1)電圧印加によるイオン流によって動的光散乱をお
こさせる方式(動的光散乱)。
Liquid crystal display methods using homeotropic structures include (1) a method in which dynamic light scattering is caused by ion flow caused by voltage application (dynamic light scattering);

(2)電圧印加により分子の配列方向をかえ複屈折の現
象を利用して光変調を行なう方式(DAP)。
(2) A method (DAP) that modulates light by changing the orientation of molecules by applying a voltage and utilizing the phenomenon of birefringence.

(3)多色素を含む液晶に電圧を閉力口し、色素分子を
横臥し、色調を変1ヒさせる方式等である。
(3) A method in which a voltage is applied to a liquid crystal containing multiple dyes to cause the dye molecules to lie down and change the color tone.

液晶表示において、ホメオトロピック組織を採用するこ
との長所は前記方式の1においては印n+>電圧零の場
合の、および電極がなく電圧が印加できない部分の透明
度を改良rるのに役立つ。
In the liquid crystal display, the advantage of adopting a homeotropic structure is that in method 1, it is useful for improving the transparency when n+>voltage is zero, and in areas where there are no electrodes and no voltage can be applied.

また2、3の方式はホメオトロピック組織にしてはじめ
て効果的な表示が可能になる。
Furthermore, in the methods 2 and 3, effective display becomes possible only when a homeotropic structure is used.

本発明は液晶自体に添加剤を添加するこみによってホメ
オトロピック組織を呈せしめるもので、本発明に用いる
添加剤1.ま下記の一般式で表わされる。
The present invention provides a homeotropic structure by adding additives to the liquid crystal itself.Additives used in the present invention: 1. It is expressed by the following general formula.

但しn== 1 、2 : 15>m>10 。However, n== 1, 2: 15>m>10.

−ORはメトキシ基で、 きパラ位、n−2のときメタ位とする。-OR is a methoxy group, When it is n-2, it is the para position, and when it is n-2, it is the meta position.

これらの1ヒ金物の1種または数種、または他のホメオ
トロピック組織を与える添、?J瞳l]との組合せで、
液晶材料に0.5〜5重量重量節囲で添加される。
One or more of these metals, or other additives that provide homeotropic organization? In combination with J Hitomi L],
It is added to the liquid crystal material in a weight range of 0.5-5.

さらに多量源fly、でもホメオトロピック組織を与え
るが、液晶状態の温度範囲の上限が下ってくる場合が多
く、シかもホメオトロピック組織の程度がより完全にな
ることもなく、実用的ではない。
Furthermore, even a large amount of fly gives a homeotropic structure, but the upper limit of the temperature range of the liquid crystal state is often lowered, and the degree of homeotropic structure may not become more complete, making it impractical.

本発明の添加剤に対して使用される液晶は限定されるも
のではナク、シッフ塩基、アゾベンゼン、アゾキンベン
ゼン、アルコキシ安息香酸、安息香酸フェニルエステル
等の各系統の液晶に適用できる。
The liquid crystal used for the additive of the present invention is not limited, but liquid crystals of various types such as NAC, Schiff base, azobenzene, azoquinbenzene, alkoxybenzoic acid, and benzoic acid phenyl ester can be applied.

次Qこ実帷例を説明する。Next, I will explain an example of a Q-book.

液晶材料として下記の1ヒ合物を重量比で1:1:1の
割合で混合したものを用い、第2図の観測者14のとこ
ろに受光器をおき、光量を測定したときの1重量幅の添
加剤を含むものと含まないものとの光量比 を測定したところ次表の如くであった。
As a liquid crystal material, a mixture of the following compounds in a weight ratio of 1:1:1 was used, and a light receiver was placed at the observer 14 in Figure 2 to measure the amount of light. The light intensity ratios of the samples containing and not including the width additive were measured, and the results were as shown in the following table.

なおこの場合、液晶層の厚さは10ミクロンとし、室温
(20℃)で測定した。
In this case, the thickness of the liquid crystal layer was 10 microns, and the measurement was performed at room temperature (20° C.).

受光器にはホトダイオードを用い、液晶層の測定面積1
平方センナメートルの領域内でのXの値の分布を求めた
A photodiode is used as the receiver, and the measurement area of the liquid crystal layer 1
The distribution of the values of X within an area of square centimeters was determined.

上記の表において、m二3では添加剤の効果が若干現わ
れてくるが、ホメオトロピック組織の形成は、測定面積
の大部分に及ぶに至らず、実用レベルのものではなかっ
た。
In the above table, in m23, the effect of the additive appears to some extent, but the formation of the homeotropic structure did not reach the majority of the measured area, and was not at a practical level.

m〉10では添加剤の効果は顕著であり、測定面積の大
部分の領域で、Xの値は小さな値となり、実用的なホメ
オトロピック組織を呈している。
When m>10, the effect of the additive is remarkable, and the value of X becomes small in most of the measurement area, indicating a practical homeotropic structure.

以上のように本発明によればネマチック液晶にホメオト
ロピック組織を呈せしめることができるので、これを用
いて効果的な表示が可能となる。
As described above, according to the present invention, a nematic liquid crystal can be made to exhibit a homeotropic structure, so that effective display can be performed using this.

【図面の簡単な説明】[Brief explanation of drawings]

第1図は液晶表示装置の縦断面略図、第2図は液晶がホ
メオトロピック組織を呈しているか否かを判定する装置
の略図である。
FIG. 1 is a schematic vertical cross-sectional view of a liquid crystal display device, and FIG. 2 is a schematic view of an apparatus for determining whether or not liquid crystal exhibits a homeotropic structure.

Claims (1)

【特許請求の範囲】 1 下式の一般式で表わされるfヒ合物を添加してホメ
オトロピック組織を呈せしめたネマチック液晶材料を備
えたことを特徴とする液晶表示装置。 但しn= 1 、2 : 15〉m>10−ORはメト
キシ基で パラ位、n=2のときメタ位とする。
[Scope of Claims] 1. A liquid crystal display device comprising a nematic liquid crystal material which is made to exhibit a homeotropic structure by adding an f-hybrid compound represented by the following general formula. However, when n=1, 2:15>m>10-OR is a methoxy group and the para position is set, and when n=2, the meta position is set.
JP4537873A 1973-04-20 1973-04-20 liquid crystal display device Expired JPS5819719B2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP4537873A JPS5819719B2 (en) 1973-04-20 1973-04-20 liquid crystal display device
CA197,164A CA1029940A (en) 1973-04-20 1974-04-09 Liquid crystal display device
GB1601574A GB1441541A (en) 1973-04-20 1974-04-10 Liquid crystal display device
US460874A US3919106A (en) 1973-04-20 1974-04-15 Liquid crystal display device
FR7413533A FR2226718B1 (en) 1973-04-20 1974-04-18
DE742419011A DE2419011C3 (en) 1973-04-20 1974-04-19 Liquid crystal display element

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4537873A JPS5819719B2 (en) 1973-04-20 1973-04-20 liquid crystal display device

Publications (2)

Publication Number Publication Date
JPS49130378A JPS49130378A (en) 1974-12-13
JPS5819719B2 true JPS5819719B2 (en) 1983-04-19

Family

ID=12717595

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4537873A Expired JPS5819719B2 (en) 1973-04-20 1973-04-20 liquid crystal display device

Country Status (1)

Country Link
JP (1) JPS5819719B2 (en)

Also Published As

Publication number Publication date
JPS49130378A (en) 1974-12-13

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