JPH0227323A - Electrochromic liquid crystal cell - Google Patents
Electrochromic liquid crystal cellInfo
- Publication number
- JPH0227323A JPH0227323A JP63177545A JP17754588A JPH0227323A JP H0227323 A JPH0227323 A JP H0227323A JP 63177545 A JP63177545 A JP 63177545A JP 17754588 A JP17754588 A JP 17754588A JP H0227323 A JPH0227323 A JP H0227323A
- Authority
- JP
- Japan
- Prior art keywords
- liquid crystal
- crystal cell
- electrochromic liquid
- electrochromic
- weight
- 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 45
- 210000002858 crystal cell Anatomy 0.000 title claims abstract description 30
- RUOJZAUFBMNUDX-UHFFFAOYSA-N propylene carbonate Chemical compound CC1COC(=O)O1 RUOJZAUFBMNUDX-UHFFFAOYSA-N 0.000 claims abstract description 10
- 238000004040 coloring Methods 0.000 claims description 16
- 239000003792 electrolyte Substances 0.000 claims description 7
- 239000011521 glass Substances 0.000 claims description 4
- 239000000758 substrate Substances 0.000 claims description 4
- 230000007704 transition Effects 0.000 abstract description 7
- 229920002799 BoPET Polymers 0.000 abstract description 3
- 239000005041 Mylar™ Substances 0.000 abstract description 3
- 125000006850 spacer group Chemical group 0.000 abstract description 3
- 238000007789 sealing Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 238000002834 transmittance Methods 0.000 description 2
- BPMBNLJJRKCCRT-UHFFFAOYSA-N 4-phenylbenzonitrile Chemical group C1=CC(C#N)=CC=C1C1=CC=CC=C1 BPMBNLJJRKCCRT-UHFFFAOYSA-N 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- AMGQUBHHOARCQH-UHFFFAOYSA-N indium;oxotin Chemical compound [In].[Sn]=O AMGQUBHHOARCQH-UHFFFAOYSA-N 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Landscapes
- Electrochromic Elements, Electrophoresis, Or Variable Reflection Or Absorption Elements (AREA)
- 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、少量の電解質を混合してなるとともに、電圧
の印加により着色・消色特性を呈するエレクトロクロミ
ック液晶セルに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an electrochromic liquid crystal cell which is formed by mixing a small amount of electrolyte and which exhibits coloring and decoloring characteristics upon application of voltage.
（従来の技術）
少量の電解質を混合した４−ｎ−ｈｅｐｔｙｌｏｘｙ−
４’ −ｃｙａｎｏｂｉｐｈｅｎｙｌ（略称、７ＣＯＢ
）の液晶セル、４−ｎ−ｏｃｔｙｌｏｘｙ−４’ −ｃ
ｙａｎｏｂｉｐｈｅｎｙｌ（略称、８ＣＯＢ）の液晶セ
ル、４−ｎｈｅｐｔｙｌ−４’ −ｃｙａｎｏｂｉｐｈ
ｅｎｙｌ（略称、７ＣＢ）の液晶セル、４−ｎ−ｏｃｔ
ｙｌ−４’ −ｃｙａｎｏｂｉｐｈｅｎｙｌ（略称、８
ｃＢ）の液晶セル等（以下、エレクトロクロミック液晶
セルという）は、外部電圧を印加していないときにおい
ては無色の状態にあるのが、外部電圧を印加することに
よりその外部電圧の大きさに対応した色に着色変化する
′という、いゆわる着色・消色特性というエレクトロク
ロミック現象を呈することが知られている。なお、この
エレクトロクロミック現象については、Ｋ、Ｎａｋａｍ
ｕｒａ、Ｙ、ＩＴＯ，Ｈ，Ｈｉｒａｂａｙａｓｈｉ ａ
ｎｄＫ、Ｏｇｕｒａ、”Ｅｌｅｃｔｒｏｃｈｅｍｉｃａ
ｌｌｙ １ｎｄｕｃｅｄ ｃｏｌｏｒａｔｉ。(Prior art) 4-n-heptyloxy- mixed with a small amount of electrolyte
4'-cyanobiphenyl (abbreviation, 7COB
) liquid crystal cell, 4-n-octyloxy-4'-c
yanobiphenyl (abbreviation, 8COB) liquid crystal cell, 4-nheptyl-4'-cyanobiph
enyl (abbreviation, 7CB) liquid crystal cell, 4-n-oct
yl-4'-cyanobiphenyl (abbreviation, 8
cB) liquid crystal cells (hereinafter referred to as electrochromic liquid crystal cells) are colorless when no external voltage is applied, but when an external voltage is applied, they respond to the magnitude of the external voltage. It is known that it exhibits an electrochromic phenomenon called coloring/decoloring property, in which the color changes to a specific color. Regarding this electrochromic phenomenon, K. Nakam
ura, Y., ITO, H., Hirabayashi a.
ndK, Ogura, “Electrochemica
lly 1 reduced colorati.
ｎ ｏｆ １ｉｑｕｉｄ ｃｒｙｓｔａｌ ｍａｔｅｒ
ｉａｌｓ”、Ｊ、Ａｐｐｌ、Ｐｈｙｓ、５３、 （Ｍａ
ｒｃｈ、 １９８２）の定期刊行物の１７９２〜１７９
６ページ参照。n of 1quid crystal mater
ials”, J, Appl, Phys, 53, (Ma
rch, 1982) periodicals 1792-179.
See page 6.
（発明が解決しようとする課題）
上記エレクトロクロミック液晶セルにおいて、そのいず
れもが液晶の相転移温度（ＴＮＩ）が高いことから、例
えば８ＣＢおよび７ＣＢのものは４０℃以上の雰囲気中
においてのみ着色・消色特性を、また、８ＣＯＢおよび
７ＣＯＢのものは７０℃以上の雰囲気中においてのみ着
色・消色特性を示すだけで、ｌＯ℃〜４０°Ｃの室温で
着色・消色特性を示すものはなかった。(Problems to be Solved by the Invention) In the electrochromic liquid crystal cells mentioned above, since the phase transition temperature (TNI) of the liquid crystal is high, for example, 8CB and 7CB cells can only be colored in an atmosphere of 40°C or higher. In addition, 8COB and 7COB only exhibit coloring and decoloring properties in an atmosphere of 70°C or higher, and none exhibit coloring and decoloring properties at room temperature between 10°C and 40°C. Ta.
本発明は、室温で着色・消色特性を示すエレクトロクロ
ミック液晶セルを提供することを目的としている。An object of the present invention is to provide an electrochromic liquid crystal cell that exhibits coloring and decoloring properties at room temperature.
（課題を解決するための手段）
このような目的を達成するために、本発明のエレクトロ
クロミック液晶セルにおいては、少量の電解質を混合し
てなるものにおいて、少量のプロピレンカーボネイトを
添加したことを特徴としている。(Means for Solving the Problem) In order to achieve such an object, the electrochromic liquid crystal cell of the present invention is characterized in that a small amount of propylene carbonate is added to the electrochromic liquid crystal cell mixed with a small amount of electrolyte. It is said that
（作用）
少量のプロピレンカーボネイトを混合したことにより、
液晶の相転移温度が低下し、その結果、室温で着色・消
色特性を呈するようになった。(Action) By mixing a small amount of propylene carbonate,
The phase transition temperature of liquid crystals has decreased, and as a result, they now exhibit coloring and decoloring properties at room temperature.
（実施例）
以下、本発明の実施例を図面を参照して詳細に説明する
。(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
第１図は本発明の実施例に係るエレクトロクロミック液
晶セルの構造断面図である。第１図において、２．２は
ネサコートされた、長さが２５ｍｍで、かつ厚さが１．
１ｍｍ〜３ｍ＋＋ｎの２枚のガラス基板である。この２
枚のガラス基板２．２の間の対向内面には、電圧印加電
極としてのＩＴＯ電極（酸化インジウム・スズ）４．４
が数千オングストロームの厚さで形成されている。その
ＩＴＯ電極４，４間には、２５μｍの厚さのマイラース
ペーサ６．６を介してエレクトロクロミック液晶８が封
入されている。FIG. 1 is a structural sectional view of an electrochromic liquid crystal cell according to an embodiment of the present invention. In Figure 1, 2.2 is Nesa coated, 25 mm long and 1.2 mm thick.
These are two glass substrates of 1 mm to 3 m++n. This 2
An ITO electrode (indium tin oxide) 4.4 as a voltage application electrode is provided on the opposing inner surface between the glass substrates 2.2.
is formed with a thickness of several thousand angstroms. An electrochromic liquid crystal 8 is sealed between the ITO electrodes 4, 4 with a Mylar spacer 6.6 having a thickness of 25 μm interposed therebetween.
本実施例におけるエレクトロクロミック液晶８は、基本
的には８ＣＨのエレクトロクロミック液晶中に少量の、
具体的には２重量％〜５重景％の濃度のｔｅｔｒａ−ｎ
−ｂｕｔｙｌ−ａｍｍｏｎｉｕｍ １ｏｄｉｄｏ（以下
、ＴＢＡ＋という。The electrochromic liquid crystal 8 in this embodiment is basically an 8CH electrochromic liquid crystal containing a small amount of
Specifically, tetra-n with a concentration of 2% by weight to 5% by weight
-butyl-ammonium 1odido (hereinafter referred to as TBA+).
）の電解液が混合されてなるものに、０．１重量％〜１
゜０重量％のプロピレンカーボネイト（以下、ＰＣとい
う。）が混合されて構成されている。) is mixed with an electrolyte of 0.1% by weight to 1% by weight.
It is composed of a mixture of 0% by weight of propylene carbonate (hereinafter referred to as PC).
上記構造を有する本実施例のエレクトロクロミック液晶
セルによれば、下記の表に示すような着色・消色特性が
得られた。According to the electrochromic liquid crystal cell of this example having the above structure, coloring and decoloring characteristics as shown in the table below were obtained.
上記の着色・消色特性の表から明らかなように、ＰＣを
混合しない従来のエレクトロクロミック液晶セルでは、
室温を越えた４０℃が相転移温度、つまり着色・消色特
性を呈する温度となるが、本実施例のエレクトロクロミ
ック液晶セルではＰＣ濃度が０゜１重Ｍ％〜１重量％の
範囲ではいずれも相転移温度が室温の範囲となって、そ
の室温で着色・潤色特性を呈することが判明した。As is clear from the table of coloring and decoloring characteristics above, in conventional electrochromic liquid crystal cells that do not contain PC,
40°C, which exceeds room temperature, is the phase transition temperature, that is, the temperature at which coloring and decoloring properties are exhibited, but in the electrochromic liquid crystal cell of this example, when the PC concentration is in the range of 0°1% by weight to 1% by weight, It was also found that the phase transition temperature was within the room temperature range, and that it exhibited coloring and embellishing properties at that room temperature.
第２図はＰＣを混合しない従来例のエレクトロクロミッ
ク液晶セルの特性と、ＰＣを混合した場合の本実施例の
エレクトロクロミック液晶セルの特性とをそれぞれ対比
して示す図である。すなわち、第２図は縦軸を光透過率
（％）に、横軸を可視光波長（ｎｉ＋）にそれぞれとっ
て、従来例のものを実線のカーブ曲線（０重量％）で、
本実施例のものを破線のカーブ曲線（０，１重量％）で
それぞれ表したものである。FIG. 2 is a diagram showing a comparison between the characteristics of a conventional electrochromic liquid crystal cell in which PC is not mixed and the characteristics of the electrochromic liquid crystal cell of this embodiment in which PC is mixed. That is, in FIG. 2, the vertical axis is the light transmittance (%) and the horizontal axis is the visible light wavelength (ni+), and the conventional example is shown as a solid curve (0% by weight).
The results of this example are respectively represented by broken curves (0 and 1% by weight).
そして、破線で表された本実施例のエレクトロクロミッ
ク液晶セルにおけるＰＣの濃度は０．１重量％であり、
それに対応するＴＢＡ ｌ濃度は３重量％である。The concentration of PC in the electrochromic liquid crystal cell of this example, represented by a broken line, is 0.1% by weight,
The corresponding TBAl concentration is 3% by weight.
また、測定温度はそれぞれ従来例では４２℃、本実施例
では２０℃である。Further, the measurement temperature is 42° C. in the conventional example and 20° C. in the present example.
第２図から明らかなように本実施例のエレクトロクロミ
ック液晶セルにおいては、光波長が６４０ｎｍ付近にお
いて従来例と対比してみて、着色・消色特性が顕著に現
れている。As is clear from FIG. 2, in the electrochromic liquid crystal cell of this example, the coloring and decoloring characteristics are remarkable when compared with the conventional example at a light wavelength of around 640 nm.
（発明の効果）
以上説明したことから明らかなように本発明によれば、
少蛍のプロピレンカーボネイトを添加した結果、液晶の
相転移温度が低下し、その結果、室温でエレクトロクロ
ミック現象を呈する液晶セルを提供することができるよ
うになった。(Effects of the Invention) As is clear from the above explanation, according to the present invention,
As a result of adding a small amount of propylene carbonate, the phase transition temperature of the liquid crystal is lowered, and as a result, it has become possible to provide a liquid crystal cell that exhibits an electrochromic phenomenon at room temperature.
第１図は本発明の一実施例に係るエレクトロクロミック
液晶セルの構造断面図、第２図は従来例と本実施例との
着色・潤色特性を対比する光透過率に対する可視光波長
の特性図である。
２・・・ガラス基板、４・・・ＩＴＯ電極、６・・・マ
イラースペサ、８・エレクトロクロミック液晶。FIG. 1 is a cross-sectional view of the structure of an electrochromic liquid crystal cell according to an embodiment of the present invention, and FIG. 2 is a characteristic diagram of visible light wavelength versus light transmittance, comparing the coloring and coloring characteristics of the conventional example and this embodiment. It is. 2... Glass substrate, 4... ITO electrode, 6... Mylar spacer, 8... Electrochromic liquid crystal.
Claims (4)
加により着色・消色特性を呈するエレクトロクロミック
液晶セルにおいて、 少量のプロピレンカーボネイトを添加したことを特徴と
するエレクトロクロミック液晶セル。(1) An electrochromic liquid crystal cell that is made by mixing a small amount of electrolyte and exhibits coloring and decoloring properties when voltage is applied, and is characterized by adding a small amount of propylene carbonate.
重量％添加したことを特徴とする請求項（１）に記載の
エレクトロクロミック液晶セル。(2) 0.1% to 1.0% by weight of propylene carbonate
The electrochromic liquid crystal cell according to claim 1, wherein the electrochromic liquid crystal cell is added in an amount of % by weight.
枚のガラス基板の間に、少量の電解質を混合してなると
ともに電圧の印加により着色・消色特性を呈するエレク
トロクロミック液晶を封入してなるエレクトロクロミッ
ク液晶セルにおいて、前記エレクトロクロミック液晶は
、少量のプロピレンカーボネイトを添加したことを特徴
とするエレクトロクロミック液晶セル。(3) 2 arranged with the electrode forming surfaces facing each other
In an electrochromic liquid crystal cell in which a small amount of electrolyte is mixed between two glass substrates and an electrochromic liquid crystal that exhibits coloring and decoloring properties is sealed when a voltage is applied, the electrochromic liquid crystal is filled with a small amount of electrolyte. An electrochromic liquid crystal cell characterized by the addition of propylene carbonate.
００重量％を添加したことを特徴とする請求項（３）に
記載のエレクトロクロミック液晶セル。(4) 0.1% to 1% by weight of the propylene carbonate
3. The electrochromic liquid crystal cell according to claim 3, wherein the electrochromic liquid crystal cell contains 0.00% by weight of the electrochromic liquid crystal cell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63177545A JPH0227323A (en) | 1988-07-15 | 1988-07-15 | Electrochromic liquid crystal cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63177545A JPH0227323A (en) | 1988-07-15 | 1988-07-15 | Electrochromic liquid crystal cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0227323A true JPH0227323A (en) | 1990-01-30 |
Family
ID=16032823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63177545A Pending JPH0227323A (en) | 1988-07-15 | 1988-07-15 | Electrochromic liquid crystal cell |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0227323A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5311702A (en) * | 1991-07-03 | 1994-05-17 | Jaguar Cars Limited | Door seals |
| US5319883A (en) * | 1990-12-07 | 1994-06-14 | Hutchinson | Sealing device for window frame with sliding or fixed pane |
-
1988
- 1988-07-15 JP JP63177545A patent/JPH0227323A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5319883A (en) * | 1990-12-07 | 1994-06-14 | Hutchinson | Sealing device for window frame with sliding or fixed pane |
| US5311702A (en) * | 1991-07-03 | 1994-05-17 | Jaguar Cars Limited | Door seals |
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