JPS63146985A - Chiral smectic liquid crystal composition - Google Patents
Chiral smectic liquid crystal compositionInfo
- Publication number
- JPS63146985A JPS63146985A JP62094512A JP9451287A JPS63146985A JP S63146985 A JPS63146985 A JP S63146985A JP 62094512 A JP62094512 A JP 62094512A JP 9451287 A JP9451287 A JP 9451287A JP S63146985 A JPS63146985 A JP S63146985A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- formula
- formulas
- tables
- crystal composition
- 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
- 239000000203 mixture Substances 0.000 title claims abstract description 22
- 239000004990 Smectic liquid crystal Substances 0.000 title claims abstract description 12
- 150000001875 compounds Chemical class 0.000 claims abstract description 16
- 125000003545 alkoxy group Chemical group 0.000 claims abstract description 7
- 125000000217 alkyl group Chemical group 0.000 claims description 7
- 125000004432 carbon atom Chemical group C* 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims 13
- 125000005843 halogen group Chemical group 0.000 claims 1
- 239000004973 liquid crystal related substance Substances 0.000 abstract description 17
- 230000004044 response Effects 0.000 abstract description 8
- 238000000151 deposition Methods 0.000 abstract 1
- 230000005684 electric field Effects 0.000 description 9
- 230000007334 memory performance Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 3
- 239000004988 Nematic liquid crystal Substances 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005262 ferroelectric liquid crystals (FLCs) Substances 0.000 description 1
- 230000005621 ferroelectricity Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000010287 polarization Effects 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
Landscapes
- Liquid Crystal Substances (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はカイラルスメクチック液晶組成物に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a chiral smectic liquid crystal composition.
近年、液晶ディスプレイは、薄型・軽量・低消費電力な
どの特徴をいかして、表示装置として幅広く用いられる
ようになった。しかし、これらの表示装置は殆んどは、
ネマティック液晶を用いたＴ−Ｎ型表示装置であり、高
マルチプレツクス化を必要とする応用分野でまだまだ応
答が遅く、改善の必要か迫られている。このような現状
の中で注目されているのが、光学活性部位を仔するカイ
ラルスメクチック液晶である。このカイラルスメクチッ
ク液晶の示すカイラルスメクチックＣ相（以下ＳｍＣ”
相とする）は、強誘電性を示し、その自発分極と電界の
結合力が大きいため、ネマティック液晶を用いたＴ−Ｎ
型表示装置では達成し得ない高速応答性を示す事が可能
である。In recent years, liquid crystal displays have come to be widely used as display devices, taking advantage of their characteristics such as thinness, light weight, and low power consumption. However, most of these display devices are
This is a T-N type display device using nematic liquid crystal, and its response is still slow in application fields that require high multiplexing, so improvements are needed. Under these circumstances, chiral smectic liquid crystals containing optically active sites are attracting attention. This chiral smectic liquid crystal exhibits a chiral smectic C phase (hereinafter referred to as “SmC”)
phase) exhibits ferroelectricity and has a large coupling force between its spontaneous polarization and electric field, so T-N using nematic liquid crystal
It is possible to exhibit high-speed response that cannot be achieved with type display devices.
さらにＳｍＣ“相は充分に薄いセルで適切な配向制御を
施す事によりメモリー性を示す（Ｃ１ａｒｋら：Ａｐｆ
）ｌｉｅｄ Ｐｈｙｓ、 １ｅｔｔ、 ３６，
８９９．１９８０）事かわっており、高速液晶シャッタ
ーや、高マルチプレツクス表示装置への材料として盛ん
に開発が進められている。Furthermore, the SmC phase exhibits memory properties when properly controlled in a sufficiently thin cell (C1ark et al.: Apf
)lied Phys, 1ett, 36,
899.1980), and active development is underway as a material for high-speed liquid crystal shutters and high-multiplex display devices.
しかし、従来のカイラルスメクチック液晶は２μｍ程度
のセルでは充分なメモリー性が得られず、従って表示時
のコントラストも充分には得られていなかった。ここで
メモリー性とは、電界を印加した時の液晶分子、即ち表
示状態が、電界を切った時に維持される事を示す。However, in the conventional chiral smectic liquid crystal, sufficient memory performance could not be obtained with a cell of about 2 μm, and therefore, sufficient contrast during display could not be obtained. Here, the term "memory property" refers to the fact that the liquid crystal molecules, ie, the display state when an electric field is applied, are maintained when the electric field is turned off.
そこで、本発明の目的は、応答スピードが速く２μｍ程
度のセルでも充分なメモリー性を有し、表示時のコント
ラストの良好なカイラルスメクチック液晶組成物を提供
する事にあたる。Therefore, an object of the present invention is to provide a chiral smectic liquid crystal composition that has a fast response speed, has sufficient memory properties even in a cell of about 2 μm, and has good contrast during display.
本発明のカイラルスメクチック液晶組成物は一般式
％式％
Ｒ１は炭素数２〜２０のアルキル基又はアルコ（ｍは０
〜８、ｎは１〜１５の整数）
Ｒ２、Ｒ２’は（ＣＨｚｍＣＨＣｎＨ２ｎ−＋−＋、
０（ＣＨ２ｋＣＨＣｎＨ２ｎ−＋（ｍは０〜８、ｎは１
〜１５の整数）又は炭素数２〜２０のアルキルもしくは
アルコキシ基。The chiral smectic liquid crystal composition of the present invention has the general formula % formula % R1 is an alkyl group or alkyl group having 2 to 20 carbon atoms (m is 0
~8, n is an integer of 1 to 15) R2, R2' are (CHzmCHCnH2n-+-+,
0(CH2kCHCnH2n-+(m is 0 to 8, n is 1
-15 integer) or an alkyl or alkoxy group having 2 to 20 carbon atoms.
Ｒ３’は一４ＣＨ２＆ＣＨＣｎＨ２ｎ＋を又は−〇ｎＣ
ＨＣｏＨ２ｏ−ｘ鼎
（ｍは０〜８、ｎは１〜１５整数）
で表される各群（１）、（２）及び（３）の化合物を少
なくとも一成分含有する事を特徴とする。R3' is -4CH2&CHCnH2n+ or -〇nC
It is characterized by containing at least one component of each group (1), (2), and (3) represented by HCoH2o-x (m is an integer of 0 to 8, n is an integer of 1 to 15).
化合物（１）の割合が２重量％こえるとＳｍＡ／５ｒｎ
Ｃ”相範囲が狭くなるため好ましくない。When the proportion of compound (1) exceeds 2% by weight, SmA/5rn
This is not preferable because the C'' phase range becomes narrower.
化合物（２）の割合が２重量％未溝では高温での液晶性
が悪くなる。If the proportion of compound (2) is 2% by weight without grooves, the liquid crystallinity at high temperatures will deteriorate.
また５０重重景をこえると、析出する可能性がある。Moreover, if the density exceeds 50, there is a possibility of precipitation.
又、化合物（３）、（４）、（５）に関しては、化合物
（２）と同様の理により、化合物（３）、（４）は２〜
５０景重％が、又化合物（５）は１〜３０ｆｆｉ量％が
好ましい。Regarding compounds (3), (4), and (5), based on the same principle as compound (2), compounds (3) and (4) are
It is preferably 50% by weight, and 1 to 30% by weight of compound (5).
〔実施例〕 第１表は本発明の液晶組成物の具体例である。〔Example〕 Table 1 shows specific examples of liquid crystal compositions of the present invention.
化合物（１）の例を １〜３
” （２） ／７ ４〜８
〃 （３） 〃 ９〜１１）／ （
４） ）ｌ １２〜）） （５）
）） １３〜次にこれら（１）〜（５）の
化合物を混合させた本発明の液晶組成物の実施例を示す
。Examples of compound (1) 1-3'' (2) /7 4-8 〃 (3) 〃 9-11)/ (
4) )l 12~)) (5)
)) 13~ Next, examples of liquid crystal compositions of the present invention in which these compounds (1) to (5) are mixed will be shown.
実施例１ 第２表に、本発明の液晶組成物実施例１の組成を示す。Example 1 Table 2 shows the composition of liquid crystal composition Example 1 of the present invention.
この液晶組成物を表面にラビング処理を施した透明電極
を存する２枚の基板に加熱封入し、セル厚が約２μｍと
なるように組みたてた電気字素子を、互いに直交する２
枚の偏光板の間に挟持し、±１５Ｖの交流電界を印加す
ると、電界の向きに応じて応答した。この時、温度は２
５＠Ｃ（室温）であり、応答速度は４００μｓｃｃ。This liquid crystal composition was heat-sealed into two substrates with transparent electrodes whose surfaces had been subjected to a rubbing treatment, and an electrical element was assembled so that the cell thickness was approximately 2 μm.
When it was sandwiched between two polarizing plates and an AC electric field of ±15 V was applied, it responded depending on the direction of the electric field. At this time, the temperature is 2
5@C (room temperature), and the response speed is 400 μscc.
と速く、コントラストも１：８以上と良好、また、メモ
リー性も充分であった。It was fast, the contrast was good at 1:8 or more, and the memory performance was also sufficient.
第２表 実施例２ 第３表に、本発明の液晶組成物実施例２の組成を示す。Table 2 Example 2 Table 3 shows the composition of liquid crystal composition Example 2 of the present invention.
この液晶組成物を表面にラビング処理を施した透明電極
を有する２枚の基板に加熱封入し、セル厚が約２μｍと
なるよに組みたてた電気光学素子を、互いに直交する２
枚の偏光板の間に挟持し、±１５Ｖの交流電界を印加す
ると、電界の向きに応じて応答した。この時、温度は２
５゜Ｃ（室温）であり、応答速度は８００μｓｃｃ。This liquid crystal composition was heat-sealed between two substrates having transparent electrodes whose surfaces had been subjected to rubbing treatment, and an electro-optical element was assembled so that the cell thickness was approximately 2 μm.
When it was sandwiched between two polarizing plates and an AC electric field of ±15 V was applied, it responded depending on the direction of the electric field. At this time, the temperature is 2
The temperature is 5°C (room temperature), and the response speed is 800μscc.
と速くコントラストも１：１０以上と良好、また、メモ
リー性も充分であった。The contrast was good at 1:10 or higher, and the memory performance was also sufficient.
第３表 実施例３ 第４表に、本発明の液晶組成物実施例３の組成を示す。Table 3 Example 3 Table 4 shows the composition of Example 3 of the liquid crystal composition of the present invention.
この液晶組成物を表面にラビング処理を施した透明電極
を有する２枚の基板に加熱封入し、セル厚が約２μｍと
なるように組みたてた電気字素子を、互いに直交する２
枚の偏光板の間に挾持し、±１５Ｖの交流電界を印加す
ると、電界の向きに応じて応答した。この時、温度は２
５゜Ｃ（室温）であり、応答速度は８００μＳＣＣ。This liquid crystal composition was heat-sealed into two substrates having transparent electrodes whose surfaces had been subjected to a rubbing treatment, and an electrical element was assembled so that the cell thickness was approximately 2 μm.
When it was held between two polarizing plates and an AC electric field of ±15V was applied, it responded depending on the direction of the electric field. At this time, the temperature is 2
The temperature is 5°C (room temperature) and the response speed is 800μSCC.
と速く、コントラストも１：１０以上と良好、また、メ
モリー性も充分であった。It was fast, the contrast was good at 1:10 or more, and the memory performance was also sufficient.
第４表
〔発明の効果〕
このように、本発明の強誘電性液晶組成物は、応答が従
来のＴ−Ｎ液晶に比べてケタ違いに速くコントラスト比
が高く、２μｍ程度のセルでも良好な光学特性を示すこ
とができる。Table 4 [Effects of the Invention] As described above, the ferroelectric liquid crystal composition of the present invention has an order of magnitude faster response than conventional T-N liquid crystals, has a high contrast ratio, and has good performance even in cells of about 2 μm. It can exhibit optical properties.
本発明の応用としては、光液晶シャッター、高マルチプ
レツクス液晶ディスプレイなどがあげられる。Applications of the invention include optical liquid crystal shutters, high multiplex liquid crystal displays, etc.
以 上that's all
Claims (5)
を少なくとも一成分含有する事を特徴とするカイラルス
メクチック液晶組成物。 但し、 Ｒ＿１、は炭素数２〜２０のアルキル基又はアルコキシ
基。Ｒ＿１′は、▲数式、化学式、表等があります▼又
は▲数式、化学式、表等があります▼ （ｍは０〜８、ｎは１〜１５の整数） Ｒ＿２、Ｒ＿２′は▲数式、化学式、表等があります▼
又は▲数式、化学式、表等があります▼、 （ｍは０〜８、ｎは１〜１５の整数） 又は炭素数２〜２０のアルキル基又はアルコキシ基。 Ｒ＿３は炭素数２〜２０のアルキル基又はアルコキシ基
。 Ｒ＿３′は▲数式、化学式、表等があります▼又は▲数
式、化学式、表等があります▼ （ｍは０〜８、ｎは１〜１５の整数）(1) General formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (1) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (2) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (3) Each group represented by ( A chiral smectic liquid crystal composition containing at least one component of the compounds 1), (2) and (3). However, R_1 is an alkyl group or an alkoxy group having 2 to 20 carbon atoms. R_1' has ▲ a mathematical formula, chemical formula, table, etc. ▼ or ▲ has a mathematical formula, chemical formula, table, etc. ▼ (m is an integer from 0 to 8, n is an integer from 1 to 15) R_2, R_2' is ▲ a mathematical formula, chemical formula, There are tables, etc.▼
Or ▲There are mathematical formulas, chemical formulas, tables, etc.▼, (m is an integer of 0 to 8, n is an integer of 1 to 15) or an alkyl group or alkoxy group having 2 to 20 carbon atoms. R_3 is an alkyl group or alkoxy group having 2 to 20 carbon atoms. R_3' has ▲ mathematical formulas, chemical formulas, tables, etc. ▼ or ▲ mathematical formulas, chemical formulas, tables, etc. ▼ (m is an integer from 0 to 8, n is an integer from 1 to 15)
くとも一成分含有する特徴とする特許請求の範囲第一項
記載のカイラルスメクチック液晶組成物。 但し、 Ｒ＿４、Ｒ＿５、は炭素数２〜２０のアルキル基もしく
はアルコキシ基。 Ｒ＿４′Ｒ＿５′は▲数式、化学式、表等があります▼
又は▲数式、化学式、表等があります▼ （ｍは０〜８、ｎは１〜１５の整数） Ｘは−Ｃｌ等のハロゲン原子。(2) General formula ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (4) ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (5) At least one of the compounds of each group (4) and (5) represented by A chiral smectic liquid crystal composition according to claim 1, characterized in that it contains a component. However, R_4 and R_5 are an alkyl group or an alkoxy group having 2 to 20 carbon atoms. R_4'R_5' has ▲mathematical formulas, chemical formulas, tables, etc.▼
Or ▲ There are mathematical formulas, chemical formulas, tables, etc. ▼ (m is an integer from 0 to 8, n is an integer from 1 to 15) X is a halogen atom such as -Cl.
５０ （３）２〜５０(3) The proportion of compound (1) is 2 to 80% by weight (2) 2 to 80% by weight
50 (3) 2-50
ラルスメクチック液晶組成物。(5) The chiral smectic liquid crystal composition according to claim 2, characterized in that the composition has a molecular weight of 1 to 30.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61-88747 | 1986-04-17 | ||
| JP8874786 | 1986-04-17 | ||
| JP61-108265 | 1986-05-12 | ||
| JP61-174248 | 1986-07-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63146985A true JPS63146985A (en) | 1988-06-18 |
Family
ID=13951499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62094512A Pending JPS63146985A (en) | 1986-04-17 | 1987-04-17 | Chiral smectic liquid crystal composition |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63146985A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63126844A (en) * | 1986-11-14 | 1988-05-30 | Kanto Kagaku Kk | Biphenylcarboxylic acid derivative |
| JPH02142750A (en) * | 1988-11-22 | 1990-05-31 | Adeka Argus Chem Co Ltd | Liquid crystal composition containing optically active compound |
-
1987
- 1987-04-17 JP JP62094512A patent/JPS63146985A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63126844A (en) * | 1986-11-14 | 1988-05-30 | Kanto Kagaku Kk | Biphenylcarboxylic acid derivative |
| JPH02142750A (en) * | 1988-11-22 | 1990-05-31 | Adeka Argus Chem Co Ltd | Liquid crystal composition containing optically active compound |
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