JPS604859B2 - Nematic liquid crystal composition - Google Patents
Nematic liquid crystal compositionInfo
- Publication number
- JPS604859B2 JPS604859B2 JP678875A JP678875A JPS604859B2 JP S604859 B2 JPS604859 B2 JP S604859B2 JP 678875 A JP678875 A JP 678875A JP 678875 A JP678875 A JP 678875A JP S604859 B2 JPS604859 B2 JP S604859B2
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- nematic liquid
- formulas
- crystal composition
- tables
- 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
Links
- 239000004988 Nematic liquid crystal Substances 0.000 title claims description 14
- 239000000203 mixture Substances 0.000 title claims description 10
- 150000001875 compounds Chemical class 0.000 claims description 9
- 239000000126 substance Substances 0.000 claims description 8
- 239000004973 liquid crystal related substance Substances 0.000 description 24
- 239000012071 phase Substances 0.000 description 8
- 125000005337 azoxy group Chemical group [N+]([O-])(=N*)* 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 239000012769 display material Substances 0.000 description 3
- 230000005669 field effect Effects 0.000 description 3
- 239000004990 Smectic liquid crystal Substances 0.000 description 2
- 238000000149 argon plasma sintering Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000007791 liquid phase Substances 0.000 description 2
- 239000007790 solid phase Substances 0.000 description 2
- 230000007704 transition Effects 0.000 description 2
- 239000004986 Cholesteric liquid crystals (ChLC) Substances 0.000 description 1
- 239000002262 Schiff base Substances 0.000 description 1
- 150000004753 Schiff bases Chemical class 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 239000002585 base Substances 0.000 description 1
- 230000003098 cholesteric effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002148 esters Chemical class 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 150000002894 organic compounds Chemical class 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Liquid Crystal (AREA)
- Liquid Crystal Substances (AREA)
Description
【発明の詳細な説明】 本発明は新規なネマチック液晶組成物に関する。[Detailed description of the invention] The present invention relates to novel nematic liquid crystal compositions.
さらに詳しくは、温度範囲が広く、非常に安定性の良い
ネマチツク液晶組成物に関する。近年、エレクトロニク
ス等の技術の進歩により、低電圧駆動が出釆、かつ低消
費電力で安価な表示体が要求されている。この要求を満
す表示体として、現在液晶を用いた表示体が有望視され
ており、すでに一部では実用化がなされている。前記の
液晶は、有機化合物であり、通常の化合物が固相→液相
→気相と相変化するのに対して、液晶は固相→液相間に
、固体と液体の性質を併せ持つ相を示す。前記の液晶だ
けが持つ相には、その分子配列の相違により、現在コレ
ステリック相、スメクチツク相、ネマチック相の３相が
見いだされており、それぞれコレステリツク液晶、スメ
クチック液晶、ネマチック液晶と呼ばれている。表示体
として、現在ネマチツク液晶が使用されており、その表
示方式には、光散乱方式と電界効果型方式の２種類が一
般に広く使われている。特に後者の電界効果型表示方式
は、前者の光散乱表示方式に比べ、消費電力が少なく、
かつ駆動電圧も低いという利点を有する。本発明による
ネマチツク液晶組成物は、電界効果型表示方式の表示体
に用いられる。従来の液晶材料には次に述べる欠点があ
った。More specifically, the present invention relates to a nematic liquid crystal composition that has a wide temperature range and is extremely stable. 2. Description of the Related Art In recent years, advances in electronics and other technologies have created a need for low-voltage drive, low-power consumption, and inexpensive display bodies. Display bodies using liquid crystals are currently seen as promising displays that meet this requirement, and have already been put into practical use in some cases. The above-mentioned liquid crystal is an organic compound, and while ordinary compounds change phase from solid phase to liquid phase to gas phase, liquid crystal has a phase that has both solid and liquid properties between solid phase and liquid phase. show. Due to differences in molecular arrangement, three phases have been found that are unique to liquid crystals: a cholesteric phase, a smectic phase, and a nematic phase, and are called cholesteric liquid crystal, smectic liquid crystal, and nematic liquid crystal, respectively. Currently, nematic liquid crystals are used as display materials, and two types of display methods are generally widely used: a light scattering method and a field effect method. In particular, the latter field-effect display method consumes less power than the former light scattering display method.
It also has the advantage of low driving voltage. The nematic liquid crystal composition according to the present invention is used in a field effect type display. Conventional liquid crystal materials have the following drawbacks.
液晶は本来有機物質であるが故に、種々の環境下におい
ては、劣化、分解は余儀ないことであった。−Ｃ−Ｎ−
たとえば、分子中に ｌ （シツフ塩日基）の様
な分子構造を有する液晶（以下シッフ液晶と略す）が、
通常表示体の材料として使用されていた。Since liquid crystals are originally organic substances, they inevitably deteriorate and decompose under various environments. -C-N- For example, a liquid crystal (hereinafter abbreviated as Schiff liquid crystal) having a molecular structure such as l (Schiff base and base) in its molecule,
Usually used as a display material.
しかし、この液晶は水分に対して非常に弱く、劣化しや
すかった。また、湿度の高い室内での取り扱いは出来な
いため、特別に湿気を取り除いた装置内で作業を行なう
などの配慮が必要であった。一方、湿度にはかなり強く
取り扱いも楽Ｎな、分子中に−↓−Ｎ （アゾキシ基）
の様な○分子構造を有する液晶（以下アゾキシ液晶と略
す）も使用されていたが、この液晶は特有な色を有する
ため、可視光及び可視光寄りの紫外線、また、それ以下
の短波長を吸収するために、アゾキシ液晶は吸収した光
により劣化を起こす。However, this liquid crystal was extremely sensitive to moisture and easily deteriorated. Furthermore, since it cannot be handled indoors with high humidity, consideration must be given to working in a device that has been specially designed to remove moisture. On the other hand, it has -↓-N (azoxy group) in the molecule, which is quite resistant to humidity and easy to handle.
Liquid crystals with a ○ molecular structure (hereinafter referred to as azoxy liquid crystals) were also used, but because this liquid crystal has a unique color, it is sensitive to visible light, ultraviolet rays near visible light, and shorter wavelengths. Due to the absorption of light, azoxy liquid crystals deteriorate due to the absorbed light.
それを防ぐためアゾキシ液晶が光を吸収しないフィル夕
一を表示体前面に掛け、保護してやらなければならなか
った。それにより、表示体全体が暗くなり、見やすさが
損なわれてしまう欠点があった。本発明は、かかる欠点
を有することのない液晶を提供することができる。本発
明による液晶は白色であり、湿気に対しては上記のァゾ
キシ液晶と同程度の強さを持つものである。以下に本発
明による液晶を説明する。To prevent this, it was necessary to protect the azoxy liquid crystal by covering the front of the display with a filter that does not absorb light. This has the disadvantage that the entire display becomes dark, impairing visibility. The present invention can provide a liquid crystal that does not have such drawbacks. The liquid crystal according to the present invention is white and has the same strength against moisture as the above-mentioned Azoxy liquid crystal. The liquid crystal according to the present invention will be explained below.
本発明による液晶は、分子中に
↑−い（エス別基）の様な分子構造を有
〇
する液晶（以下ェステル液晶と略す）であり、前述した
ように湿気には強いため取り扱いは容易である。The liquid crystal according to the present invention is a liquid crystal (hereinafter referred to as ester liquid crystal) that has a molecular structure like ↑- (S group) in its molecules, and as mentioned above, it is resistant to moisture and is easy to handle. be.
また、この液晶もある波長以下の紫外線及び紫外寄りの
可視光を吸収するため、アゾキシ液晶と同様にフィルタ
ーを掛けてやるが、このフィルターはほとんど無色透明
なため見やすさが損なわれることはない。本発明は特に
表１に示す７種のネマチック液晶を混合することにより
、すぐれた特性を有するネマチック液晶組成物が得られ
ることを見出したものである。Also, since this liquid crystal absorbs ultraviolet rays below a certain wavelength and visible light close to ultraviolet, it is filtered in the same way as azoxy liquid crystal, but this filter is almost colorless and transparent, so visibility is not impaired. The present invention is based on the discovery that by mixing the seven types of nematic liquid crystals shown in Table 1, a nematic liquid crystal composition having excellent properties can be obtained.
これら７種のネマチック液晶の温度特性を表１に示す。
．表１
表１において、Ｃ−Ｎ、Ｎ−１はそれぞれ、固体−ネマ
チック転移温度、ネマチックー等方性液体転移温度を示
す。Table 1 shows the temperature characteristics of these seven types of nematic liquid crystals.
．． Table 1 In Table 1, CN and N-1 indicate the solid-nematic transition temperature and nematic-isotropic liquid transition temperature, respectively.
以下の表においても同様である。表１の液晶化合物を用
いて調合した本発明のネマチック液晶組成物の成分と、
その割合と、温度特性の一例を表２に示す。本発明によ
るネマチック液晶組成物は、上記の． 表から分るよう
に−４℃から５７０と広い範囲にわたるネマチック相を
有するものである。The same applies to the table below. Components of the nematic liquid crystal composition of the present invention prepared using the liquid crystal compounds shown in Table 1,
Table 2 shows the ratio and an example of temperature characteristics. The nematic liquid crystal composition according to the present invention is as described above. As can be seen from the table, it has a nematic phase over a wide range from -4°C to 570°C.
また、本発明によるネマチック液晶組成物は過冷却がか
なり利くため、表示体として使用した場合の温度範囲は
広くなり、一ｌｙｏくらいから十６０℃程度は確保出来
る。Further, since the nematic liquid crystal composition according to the present invention can be supercooled considerably, the temperature range when used as a display material is wide, and can secure a temperature range of about 100° C. to about 160° C.
そのため、寒冷地でも異状−１なく使用出釆るものであ
る。Therefore, it can be used even in cold regions without any abnormalities.
本発明によるネマチック液晶組成物は白色であるため、
表示体として場合、コントラストが良く表示能力が高い
ものである。Since the nematic liquid crystal composition according to the present invention is white,
When used as a display, it has good contrast and high display ability.
Claims (1)
ク液晶組成物。[Claims] 1. A compound whose structural formula is ▲There are mathematical formulas, chemical formulas, tables, etc.▼ ▲There are mathematical formulas, chemical formulas, tables, etc.▼ Compounds whose structural formula is represented by ▲There are mathematical formulas, chemical formulas, tables, etc.▼ Compounds represented by ▲ There are mathematical formulas, chemical formulas, tables, etc.▼ Compounds represented by ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ Compounds represented by ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ Compounds represented by and ▲There are mathematical formulas, chemical formulas, tables, etc.▼ A nematic liquid crystal composition characterized by consisting of a compound represented by the following.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP678875A JPS604859B2 (en) | 1975-01-14 | 1975-01-14 | Nematic liquid crystal composition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP678875A JPS604859B2 (en) | 1975-01-14 | 1975-01-14 | Nematic liquid crystal composition |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5181794A JPS5181794A (en) | 1976-07-17 |
| JPS604859B2 true JPS604859B2 (en) | 1985-02-07 |
Family
ID=11647904
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP678875A Expired JPS604859B2 (en) | 1975-01-14 | 1975-01-14 | Nematic liquid crystal composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS604859B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62176659U (en) * | 1986-04-30 | 1987-11-10 | ||
| JPH0313742A (en) * | 1989-06-12 | 1991-01-22 | Matsushita Electric Ind Co Ltd | water heater |
-
1975
- 1975-01-14 JP JP678875A patent/JPS604859B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62176659U (en) * | 1986-04-30 | 1987-11-10 | ||
| JPH0313742A (en) * | 1989-06-12 | 1991-01-22 | Matsushita Electric Ind Co Ltd | water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5181794A (en) | 1976-07-17 |
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