JPS62231943A - Liquid crystal display device - Google Patents
Liquid crystal display deviceInfo
- Publication number
- JPS62231943A JPS62231943A JP7481686A JP7481686A JPS62231943A JP S62231943 A JPS62231943 A JP S62231943A JP 7481686 A JP7481686 A JP 7481686A JP 7481686 A JP7481686 A JP 7481686A JP S62231943 A JPS62231943 A JP S62231943A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- display device
- crystal display
- thickness
- range
- 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 89
- 239000000203 mixture Substances 0.000 claims abstract description 20
- 239000013543 active substance Substances 0.000 claims abstract description 6
- 150000001875 compounds Chemical class 0.000 claims description 9
- 239000004988 Nematic liquid crystal Substances 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 125000003545 alkoxy group Chemical group 0.000 claims description 3
- 239000000758 substrate Substances 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims 2
- AUXIEQKHXAYAHG-UHFFFAOYSA-N 1-phenylcyclohexane-1-carbonitrile Chemical compound C=1C=CC=CC=1C1(C#N)CCCCC1 AUXIEQKHXAYAHG-UHFFFAOYSA-N 0.000 abstract description 2
- WLPATYNQCGVFFH-UHFFFAOYSA-N 2-phenylbenzonitrile Chemical group N#CC1=CC=CC=C1C1=CC=CC=C1 WLPATYNQCGVFFH-UHFFFAOYSA-N 0.000 abstract description 2
- 238000002834 transmittance Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- 230000007704 transition Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000000007 visual effect Effects 0.000 description 3
- 230000005684 electric field Effects 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 241000272201 Columbiformes Species 0.000 description 1
- 240000003473 Grevillea banksii Species 0.000 description 1
- CYTYCFOTNPOANT-UHFFFAOYSA-N Perchloroethylene Chemical compound ClC(Cl)=C(Cl)Cl CYTYCFOTNPOANT-UHFFFAOYSA-N 0.000 description 1
- 230000003466 anti-cipated effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は液晶表示装置に係り、特にパーソナルコンピュ
ータやワードプロセッサ等に用いられる大型液晶表示装
置の具現化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, and particularly to the implementation of a large-sized liquid crystal display device used in personal computers, word processors, and the like.
（発明の概要）
本発明は、正の誘電異方性を有するネマティック液晶組
成物が、対向配置された上下一対の透明電極に挟持され
、その厚さ方向に１８０°〜２７０°の範囲でねじれた
ら旋構造を形成し、■つこのら旋構造を挟んで設けられ
た一対の偏光板の透過軸、或は吸収軸が液晶分子の界面
近傍の液晶分子配列方向に対して、それぞれ４５°±３
ｏ°。(Summary of the Invention) In the present invention, a nematic liquid crystal composition having positive dielectric anisotropy is sandwiched between a pair of upper and lower transparent electrodes arranged opposite each other, and is twisted in the thickness direction in a range of 180° to 270°. A spiral structure is formed, and the transmission axes or absorption axes of the pair of polarizing plates provided on both sides of the spiral structure are respectively 45°±with respect to the liquid crystal molecule alignment direction near the interface of the liquid crystal molecules. 3
o°.
或は３５゛±３０°の角度で配置され、液晶層の厚みｄ
（ｍ）と、液晶の屈折率異方性Δｎの積Δｎ−ｄｔｆ
ｉ０．７〜１．２趨の範囲内になるように構成された電
界制御複屈折効果を応用した液晶表示装置（以下ＮｅＷ
ＴＮ型液晶表示装置と呼ぶ）において、該液晶表示
装置の内部に封入される液晶組成物として、一般式
Ｒ−弱一〇Ｎ で表わされる液晶化合物（Ｒはｎ−ア
ルキル基）を５〜４０重品パーセント、一般式 Ｒ−■
◎−ＣＮで表わされる液晶化合物（０はトランスシクロ
ヘキシル基）を５〜４０重患パーセント、一般式Ｒ−！
Ｒ’ で表わされる液晶化合物（Ｒ’はｎ−アル
キル塁、アルコキシ塁、又はＦ）を１０〜５０重量パー
セント含有し、且つ液晶層の厚みｄ （＃）と液晶の固
有ら旋ピッチＰ（趨）との比ｄ／Ｐが０．５〜１．０の
範囲になる様に旋光物質を含有する液晶組成物を用いる
事により、時分割特性の優れた人容吊液晶表示装置を提
供づ−る事ができるようにしたものである。Or arranged at an angle of 35° ± 30°, the thickness of the liquid crystal layer d
(m) and the refractive index anisotropy Δn of the liquid crystal, Δn−dtf
A liquid crystal display device (hereinafter referred to as NeW) that applies the electric field controlled birefringence effect and is configured so that the i is within the range of 0.7 to 1.2.
(referred to as a TN type liquid crystal display device), the liquid crystal composition sealed inside the liquid crystal display device has the general formula
A liquid crystal compound represented by R-weak 10N (R is an n-alkyl group) in a weight percent of 5 to 40%, and the general formula R-■
◎ Liquid crystal compound represented by -CN (0 is transcyclohexyl group) with 5 to 40 percent of cases, general formula R-!
It contains 10 to 50 weight percent of a liquid crystal compound represented by R'(R' is an n-alkyl group, an alkoxy group, or F), and has a liquid crystal layer thickness d (#) and an inherent helical pitch P (trend) of the liquid crystal layer. ) By using a liquid crystal composition containing an optically active substance such that the ratio d/P is in the range of 0.5 to 1.0, it is possible to provide a human suspension liquid crystal display device with excellent time division characteristics. It was designed so that it was possible to
（従来の技術）
近年は表示情報ｍの増大に伴い、Ｘ−Ｙマトリクス状に
’；１極を構成した請るドツトマトリクス液晶表示装置
が、薄型軽量コンパクトな表示端末として注目を集めて
いる。(Prior Art) In recent years, as the amount of display information m has increased, dot matrix liquid crystal display devices configured with one pole in an X-Y matrix are attracting attention as thin, lightweight, and compact display terminals.
第２図に示す様な９０”のら旋構造を持つツイストネマ
ティック液晶表示装置（以下９０°ＴＮと呼ぶ）は、液
晶分子に印加された電圧に対する光透過率（反射率〉変
化が急峻でない為時分割駆動特性が悪く、表示コントラ
ストの悪さ、クロストークの発生に伴う視野角の狭さ等
、大型表示端末装置としては重大な欠点を有しており、
広く市場に受は入れられる迄には至っていない。弾性理
論からの解析により、液晶パネル内に封入される正の誘
電異方性を右するネマティック液晶組成物としては、ス
プレーの弾性定数に１とベンドの弾性定数に３との比に
？／に３の小ざいちのの方が、液晶分子に印加される電
圧に対する光透過率く反射率）変化が急峻になる事が知
られているが、実際にはその様な材料を作り出す事は困
難であり、今のところ十分な成果は１１られていない。Twisted nematic liquid crystal display devices (hereinafter referred to as 90°TN) with a 90" spiral structure as shown in Figure 2 are characterized by the fact that the change in light transmittance (reflectance) in response to the voltage applied to the liquid crystal molecules is not steep. It has serious drawbacks as a large display terminal device, such as poor time-division drive characteristics, poor display contrast, and narrow viewing angle due to crosstalk.
It has not reached the point where it has been widely accepted by the market. According to an analysis based on elasticity theory, for a nematic liquid crystal composition that has positive dielectric anisotropy sealed in a liquid crystal panel, the elastic constant of spray is 1 and the elastic constant of bend is 3. It is known that the change in light transmittance (reflectance) with respect to the voltage applied to the liquid crystal molecules is steeper for small-size materials of /3, but it is actually difficult to create such materials. It is difficult, and so far no sufficient results have been achieved.
最近では、第１図に示す様に、正の誘電異方性を有する
ネマティック液晶組成物（６）を、１８０〜２７０°の
大きなら旋構造を持たせるように、対向配置された一対
の透明［１３板（２ａ）。Recently, as shown in Fig. 1, a nematic liquid crystal composition (6) having positive dielectric anisotropy has been developed by combining a pair of transparent liquid crystals facing each other so as to have a large helical structure of 180 to 270 degrees. [Plate 13 (2a).
（２ｂ）で挟持し、このら旋構造を挟んで設けられた一
対の偏光板（ｌａ）、（１ｂ）の透過軸（８ａ）、（８
ｂ）、或は吸収軸が、液晶配向膜（４ａ）、（４ｂ）の
界面近傍の液晶分子配列方向に対してそれぞれ４５°±
３ｏ°、或は１３５°±３０”の角度になる様に配置し
、液晶層の厚みｄ（趨）と、液晶の屈折率異方性Δｎの
積Δｎ・ｄｈ（０，７〜１．２趨になる様なパネル構造
をとる、電界制御複屈折効果（Ｉｔ、 Ａ、 ５ｏｒｅ
ｆ ａｎｄ Ｈ，Ｊ、Ｒａｆｕｓｅ、 Ｊ、 ＡＩ）Ｄ
ｌ、 Ｐｈｙｓ、 ４３．２０２９ （１９７２））
を応用した。Ｎｅｗ ＴＮ表示装置が提案されており
、従来の９０″ＴＮ表示装置の表示特性を大幅に、ヒ回
る事が確認され、大容量液晶表示装置への応用が大いに
期待されている。しかしながら、この新しい表示方式に
対してどの様な液晶材料が適しているのか現状では殆ん
ど解叫されていない。(2b) and a pair of polarizing plates (la) and (1b) provided with the spiral structure on both sides of the transmission axes (8a) and (8
b), or the absorption axis is 45°±with respect to the liquid crystal molecule alignment direction near the interface of the liquid crystal alignment films (4a) and (4b), respectively.
The product of the thickness d (trend) of the liquid crystal layer and the refractive index anisotropy Δn of the liquid crystal is Δn・dh (0.7 to 1.2 Electric field controlled birefringence effect (It, A, 5ore
f and H, J, Rafuse, J, AI) D
I, Phys, 43.2029 (1972))
was applied. A new TN display device has been proposed, and it has been confirmed that the display characteristics of the conventional 90" TN display device are significantly improved, and its application to large-capacity liquid crystal display devices is highly anticipated. However, this new At present, it is hardly clear what kind of liquid crystal material is suitable for the display method.
（発明が解決しようとする問題点）
第３図は、液晶分子に印加された電圧に対する光透過率
変化を示したものであり、図中３１は、９０°ねじれの
ツイストネマティック表示装置の電圧−透過率特性、図
中３２は、２００”の液晶分子のら旋構造を有するＮｅ
ｗ ＴＮの電圧−透過率特性を示したものである。第
４図において、液晶パネルに、各々１０％、９０％の透
過率をＭえる為に必要な印加電圧を、Ｖ 、Ｖｔｈと
するＳａ（
と、液晶表示装置をマルチブレクス駆動する場合には、
■ ／Ｖ、ｈの比が小さいものの方が、良ａｔ
好む表示特性を与える事が出来る。第２表は、最適バイ
アス法を用いてマルチプレツクレックス駆動した場合の
デユーティ比と駆動マージン〈選択画素に印加される実
効電圧／非選択画素に印加される実効電圧）を示したも
のである。(Problems to be Solved by the Invention) FIG. 3 shows the change in light transmittance with respect to the voltage applied to liquid crystal molecules. In the figure, 31 indicates the voltage - In the transmittance characteristics, 32 in the figure is Ne having a helical structure of 200" liquid crystal molecules.
w This shows the voltage-transmittance characteristics of TN. In FIG. 4, the voltages applied to the liquid crystal panel to obtain a transmittance of 10% and 90%, respectively, are represented by V and Vth (Sa), and when the liquid crystal display device is driven by multiplex,
(2) The smaller the ratio of /V and h, the better the desired display characteristics can be provided. Table 2 shows the duty ratio and drive margin (effective voltage applied to selected pixels/effective voltage applied to non-selected pixels) when multiplex driving is performed using the optimal bias method.
〈第２表〉
デユーティ比と駆動マージン
６４０Ｘ４００画素（１／２００デユーテイ）の大容量
表示装置では、最適バイアス法を用いても駆動マージン
は１．０７３と極めて小さく、従って正面から良好な表
示コントラストを得る為には、■、８ｔ／■ｔｈが、駆
動マージンと同程度か、それ以下にならなければい番プ
ないが、これに対して９０°ＴＮ型液晶表示装置では、
■Ｓａｔ／■ｔｈが１．２５〜１．４０程度とかなり大
きな値となり、殆んど正面からは判読できない様な表示
コントラストしか得られない。又、従来のツイスト型液
晶表示装置用のハイデユーティ液晶材料に所定Ｇの旋光
物質を添加したＮｅｗ−ＴＮ用液晶材料を、ＮｅＷ Ｔ
ＮＮ型液晶表示装置適用した場合でも、Ｖ／Ｖｔｈが１
．１０〜１．２０と、従ａｔ
来のものに比べればかなり大幅な改善ができるものの、
表示装置としては十分な特性を与えるには至っていない
。<Table 2> Duty ratio and drive margin In a large-capacity display device with 640 x 400 pixels (1/200 duty), the drive margin is extremely small at 1.073 even when using the optimal bias method, so it is difficult to obtain good display contrast from the front. In order to obtain this, 8t/■th must be equal to or less than the drive margin, but on the other hand, in a 90° TN type liquid crystal display device,
(2)Sat/(3)th is a fairly large value of about 1.25 to 1.40, and a display contrast that is almost unreadable from the front is obtained. In addition, a liquid crystal material for New-TN, which is a high-duty liquid crystal material for a conventional twist type liquid crystal display device and an optically active substance of a predetermined G, is used as a liquid crystal material for New-TN.
Even when applying a NN type liquid crystal display device, V/Vth is 1
．． 10 to 1.20, which is a considerable improvement compared to the conventional one, but
It has not yet been able to provide sufficient characteristics as a display device.
（問題点を解決するための手段）
これまで述べてきた問題点を解決する為には、液晶層の
厚みｄ （趨）と、液晶のら族ピッチＰ（＊）の比ｄ／
Ｐが０．５〜１．０の範凹内になるように所定量の旋光
物質を含み、一般式Ｒ−倒トＣＮ で表わされるシア
ノビフェニル系液晶化合物（Ｒはｎ−アルキル基）を５
〜４０１ｍパーセント、一般式 Ｒ−■◎−ＣＮ
で表わされるシアノフェニルシクロヘキサン系液晶化合
物（Ｒはｎ−アルキル基、■ はトランスシクロヘキシ
ル基）を、５〜４０重量パーセント、一般式Ｒ−（ト）
函トＲ’ で表わされる液晶化合物（Ｒ’はｎ−ア
ルキル基、アルコキシＷ、Ｆ）を１０〜５０重量パーセ
ント含有した液晶組成物を、ＮｅｗＴＮ型液晶表示装置
に用いる事によって、■ｓａｔ／■ｔｈの小さい、即ち
時分割特性の良い優れた表示品位を持つ大容量液晶表示
装置を実現する事ができるようになる。(Means for solving the problem) In order to solve the problems described so far, the ratio d/
A cyanobiphenyl liquid crystal compound (R is an n-alkyl group) containing a predetermined amount of optically active substance such that P is within the range of 0.5 to 1.0 and represented by the general formula R-inverted CN (R is an n-alkyl group) is
~401m percent, general formula R-■◎-CN
5 to 40% by weight of a cyanophenylcyclohexane liquid crystal compound represented by (R is an n-alkyl group, ■ is a transcyclohexyl group), and the general formula R-(t)
By using a liquid crystal composition containing 10 to 50 weight percent of a liquid crystal compound represented by box R'(R' is an n-alkyl group, alkoxy W, F) in a NewTN type liquid crystal display device, ■sat/■ It becomes possible to realize a large-capacity liquid crystal display device with a small th, that is, with good time division characteristics and excellent display quality.
（実施例）
第１表は、実施例として用いた液晶組成物の成分表であ
る。使用したＮｅＷ ＴＮ型液晶表示装置の基本構造
は第１図に示したものであり、具体的には、液晶分子の
ら旋の角度（５）は２００゜液晶配向１ｉ！Ｊ （４ａ
） 、 （４ｂ ） （７）界１１ｔｌｌＲ（７）
分子配列方向（７ａ）、（７ｂ）と偏光板（１ａ） 。(Example) Table 1 is a list of ingredients of a liquid crystal composition used as an example. The basic structure of the NeW TN type liquid crystal display device used is shown in FIG. 1. Specifically, the helical angle (5) of the liquid crystal molecules is 200°, and the liquid crystal orientation is 1i! J (4a
), (4b) (7)Kai11tllR(7)
Molecular alignment directions (7a), (7b) and polarizing plate (1a).
（１ｂ）の透過軸（８ａ）、（８ｂ）と為す角度は４５
°とした。又、液晶層の厚みとしてはｄ／Ｐが０．６５
となる様にし、屈折率異方性Δｎと液晶層の厚みΔｎ−
ｄは０．９５とした。The angle between (1b) and the transmission axis (8a) and (8b) is 45
°. Also, as for the thickness of the liquid crystal layer, d/P is 0.65.
The refractive index anisotropy Δn and the liquid crystal layer thickness Δn−
d was set to 0.95.
実施例１の組成による混合ネマティック液晶では、Ｎ−
１転移温度は９０℃、Ｓ−Ｎ転移温度は〉−４０℃、ｌ
１ｌｉ！折率異方性Δｎは、０．１１５であった。使用
したＮｅＷ ＴＮ表示パネルの液晶層の厚みは８．２
鳩である。この様にして構成したＮｅＷ ＴＮ型液晶
表示パネルを、キ１！ノン製のフＡトメータＬＣ−３Ｐ
型で、５５０ｎｍの波長により、３２１１７のスタティ
ック駆動時の、■ｓａｔ’ｖｔｈを測定したところ、Ｖ
−２，３２２Ｖ、 Ｖｔ。In the mixed nematic liquid crystal having the composition of Example 1, N-
1 transition temperature is 90℃, S-N transition temperature is 〉-40℃, l
1li! The refractive index anisotropy Δn was 0.115. The thickness of the liquid crystal layer of the New TN display panel used was 8.2
It's a pigeon. The New TN type liquid crystal display panel constructed in this way is made of Non-manufactured foot meter LC-3P
When 32117 was statically driven with a wavelength of 550 nm, ■sat'vth was measured with a mold, and it was found that V
-2,322V, Vt.
ａｔ
＝２．３０４Ｖであり、Ｖ／Ｖｔｈは１．００７８でａ
ｔ
あった。又、１／２００デユーテイ、１／１．５゜１４
バイアス、フレーム周波数６４ Ｈ２の条件で、ＯＮ、
ＯＦＦ時の透過率の比、即ちコントラスト比（以下Ｃ−
Ｒと記す）の最大値を測定したところ、第４図に示すよ
うに、Ｃ−Ｒ＝４・２とかなり大きな値を示した。又、
最大Ｃ−Ｒを与える角度し１５°と、かなり正面の方に
最大視覚方向が立ってさている。更に、視覚範囲に関し
ても、Ｃ−Ｒ＞２を与える角度の範囲が、−８°から４
０°と４８°もあり、極めて時分割特性の良い、視認性
の高い表示装置となっている事がわかる。at = 2.304V, V/Vth is 1.0078 and a
There was. Also, 1/200 duty, 1/1.5゜14
Bias, frame frequency 64 Under the conditions of H2, ON,
The ratio of transmittance when OFF, that is, the contrast ratio (hereinafter referred to as C-
When the maximum value of C-R (denoted as R) was measured, as shown in FIG. 4, it showed a considerably large value of C-R=4.2. or,
The angle that gives the maximum C-R is 15 degrees, and the maximum visual direction is quite far in front. Furthermore, regarding the visual range, the range of angles that give C-R>2 is from -8° to 4°.
There are also 0 degrees and 48 degrees, and it can be seen that the display device has extremely good time division characteristics and high visibility.
実施例２の組成による混合ネマティック液晶の本発明に
用いた液晶混合物の組成
第１表
場合は、温度変化による液晶の屈折率異方性Δｎの変化
に伴う表示パネルの色変化を防止する目的の為に、基本
的には実施例１の組成をもとに、液量組成物のＮ−Ｉ転
移温度を引き上げた乙のである。Ｎ−１転移は１００℃
、Ｓ−Ｎ転移温度は〉−４０℃、Δｎは０．１２０であ
った。Mixed nematic liquid crystal according to the composition of Example 2 Table 1 shows the composition of the liquid crystal mixture used in the present invention. Therefore, the N-I transition temperature of the liquid composition was basically raised based on the composition of Example 1. N-1 transition is 100℃
, the S-N transition temperature was >-40°C, and Δn was 0.120.
実施例１の場合と同様に電気光学特性を測定したところ
、Ｖ −２，３８４Ｖ、 Ｖｔｈ−２，２０５ａｔ
５Ｖ、Ｖ ／Ｖ、ｈ−１，０８１であった。又１ａ
ｔ
／２００デユーティ駆動下での最大Ｃ−Ｒは３．８０゜
最大視覚方向は１７．５°、Ｃ−Ｒ＞２の範囲は、−６
°から３８°の４４°であった。When the electro-optical characteristics were measured in the same manner as in Example 1, the results were V-2,384V, Vth-2,205at 5V, V/V, and h-1,081. Also 1a
The maximum CR under t/200 duty drive is 3.80°, the maximum visual direction is 17.5°, and the range of CR>2 is -6
It was 44°, which is 38° from °.
（効果）
以上述べてきた様に、本発明を用いれば、極めて視認性
の高い、大容量大型液晶表示装置を具現化する事ができ
るものである。(Effects) As described above, by using the present invention, it is possible to realize a large-capacity, large-sized liquid crystal display device with extremely high visibility.
第１図は、本発明を用いた液晶表示装置の構成を示す斜
視断面図。
１ａ、ｌｂは偏光板、２ａ、 ２’ｏは透明ガラス基板
、３ａ、３ｂは透１！１’ｌ極、４ａ、４ｂは液晶配向
膜、５は液晶のねじれ角、６は液晶、７ａ。
７ｂは配向膜近傍の液晶分子の配列方向、Ｂａ。
８ｂは偏光板の透過軸を示す。
第２図は、９０°ＴＮ型液晶表示装置の構成を示す断面
図。
図中、２１ａ、２１ｂは偏光板、２２ａ、２２ｂは透明
ガラス基板、２３は液晶を示す。
第３図は、液晶パネルに印加された電圧に対する透過率
変化を示１特性図。
図中 ３１は９０°ＴＮ型液晶表示装置の場合の透過率
変化特性、３２は、Ｎｅｗ ＴＮ型表示装置の場合の
透過率変化特性を示す。
＃ｌＡ年り１；凝山東元褒混ｎフ〉トラストう存剪１夜
存、匝に示寸磨櫨ａマ・ある、 ■
上山願人 セイコー電子工業株式会社
；２ｂ表序着昭！の不琴〃辷乏かＴ余午後勤−面２第１
図
９０８郭れネマ１．ｙ７二う良品ｐホ装置め１ｚ第２図
打力０電斥とｔｉ！Ｌ！Ｐ″Ｎ５係
第３図
誉見旦貝り１句 （度）
）ミ晶碧Ｕｉ訝距１のフントウストの劣【角４４％＃Ｊ
鷹をホ７ｆ、＝）乞已第４図FIG. 1 is a perspective sectional view showing the configuration of a liquid crystal display device using the present invention. 1a and lb are polarizing plates, 2a and 2'o are transparent glass substrates, 3a and 3b are transparent 1!1'l poles, 4a and 4b are liquid crystal alignment films, 5 is a twist angle of liquid crystal, 6 is a liquid crystal, and 7a. 7b is the alignment direction of liquid crystal molecules near the alignment film, Ba. 8b indicates the transmission axis of the polarizing plate. FIG. 2 is a sectional view showing the configuration of a 90° TN type liquid crystal display device. In the figure, 21a and 21b are polarizing plates, 22a and 22b are transparent glass substrates, and 23 is a liquid crystal. FIG. 3 is a characteristic diagram showing changes in transmittance with respect to voltage applied to the liquid crystal panel. In the figure, 31 shows the transmittance change characteristic in the case of a 90° TN type liquid crystal display device, and 32 shows the transmittance change characteristic in the case of the New TN type display device. ＃lA year 1; Kozan Higashi Genpo mix nfu> Trust Uzonsai 1st night, there is a picture of size in the box, there is a, ■
Ganto Ueyama Seiko Electronics Industries Co., Ltd.; 2b top ranking! No-Koto, Lack of T, Afternoon Shift - Side 2, No. 1
Figure 908 Nema 1. y7 2 quality products pho device me 1z Figure 2 batting force 0 electricity and ti! L! P″N5 Section 3 Homamidankairi 1 haiku (degrees)) Mishyouheki Ui 1st Huntoust inferiority [angle 44% #J
Hawk 7f, =) Beggar Figure 4
Claims (1)
が、対向配置された上下一対の透明電極基板間に挟持さ
れ、その厚さ方向に１８０°から２７０°の範囲内でね
じれたら旋構造を形成し、且つこのら旋構造を挟んで設
けられた一対の偏光板の透過軸、或は吸収軸が、液晶配
向膜の界面近傍の液晶分子配列方向に対して、それぞれ
４５°±３０°、１３５°±３０°の角度で配置され、
液晶層の厚みｄ（μｍ）と、液晶の屈折率異方性Δｎの
積Δｎ・ｄが、０．７〜１．２μｍの範囲内にある液晶
表示装置において、該液晶表示装置内に封入される液晶
組成物として、一般式 ▲数式、化学式、表等があります▼で表わされる液晶化
合物（Ｒはｎ −アルキル基）を５〜４０重量パーセント、一般式▲数
式、化学式、表等があります▼で表わされる液晶化合物 （■は、トランスシクロヘキシル基）を５〜４０重量パ
ーセント、一般式▲数式、化学式、表等があります▼で 表わされる液晶化合物（Ｒ′はｎ−アルキル基、アルコ
キシ基、Ｆ）を１０〜５０重量パーセント含有し、且つ
、液晶層の厚みｄ（μｍ）と、液晶の固有ピッチＰ（μ
ｍ）との比ｄ／Ｐの値が０．５から１．０の範囲になる
様に旋光物質を含有する液晶組成物を用いた事を特徴と
する液晶表示装置。(1) A nematic liquid crystal composition having positive dielectric anisotropy is sandwiched between a pair of upper and lower transparent electrode substrates arranged opposite each other, and has a spiral structure twisted within a range of 180° to 270° in the thickness direction. , and the transmission axes or absorption axes of the pair of polarizing plates provided with this helical structure sandwiched therebetween are each at 45°±30° with respect to the liquid crystal molecule alignment direction near the interface of the liquid crystal alignment film. , arranged at an angle of 135°±30°,
In a liquid crystal display device in which the product Δn·d of the thickness d (μm) of the liquid crystal layer and the refractive index anisotropy Δn of the liquid crystal is within the range of 0.7 to 1.2 μm, the liquid crystal display device is sealed in the liquid crystal display device. As a liquid crystal composition, 5 to 40% by weight of a liquid crystal compound (R is an n-alkyl group) represented by the general formula▲Mathematical formula, chemical formula, table, etc.▼ A liquid crystal compound represented by (■ is a transcyclohexyl group) 5 to 40% by weight, a liquid crystal compound represented by the general formula ▲ Numerical formula, chemical formula, table, etc. ▼ (R' is an n-alkyl group, an alkoxy group, F ), and the thickness d (μm) of the liquid crystal layer and the specific pitch P (μm) of the liquid crystal layer are 10 to 50% by weight.
A liquid crystal display device characterized in that a liquid crystal composition containing an optically active substance is used so that the ratio d/P with m) is in the range of 0.5 to 1.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7481686A JPS62231943A (en) | 1986-04-01 | 1986-04-01 | Liquid crystal display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7481686A JPS62231943A (en) | 1986-04-01 | 1986-04-01 | Liquid crystal display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62231943A true JPS62231943A (en) | 1987-10-12 |
Family
ID=13558212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7481686A Pending JPS62231943A (en) | 1986-04-01 | 1986-04-01 | Liquid crystal display device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62231943A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62260886A (en) * | 1986-05-07 | 1987-11-13 | Hitachi Ltd | Liquid crystal display element |
| JPH01106020A (en) * | 1987-10-20 | 1989-04-24 | Toshiba Corp | Liquid crystal display element |
| US4856875A (en) * | 1986-12-29 | 1989-08-15 | Sharp Kabushiki Kaisha | Liquid-crystal display devices of twisted nematic type |
| JPH02274794A (en) * | 1989-04-17 | 1990-11-08 | Chisso Corp | Liquid crystal composition and liquid crystal display element prepared therefrom |
-
1986
- 1986-04-01 JP JP7481686A patent/JPS62231943A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62260886A (en) * | 1986-05-07 | 1987-11-13 | Hitachi Ltd | Liquid crystal display element |
| US4856875A (en) * | 1986-12-29 | 1989-08-15 | Sharp Kabushiki Kaisha | Liquid-crystal display devices of twisted nematic type |
| JPH01106020A (en) * | 1987-10-20 | 1989-04-24 | Toshiba Corp | Liquid crystal display element |
| JPH02274794A (en) * | 1989-04-17 | 1990-11-08 | Chisso Corp | Liquid crystal composition and liquid crystal display element prepared therefrom |
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