JPH04502486A - 液晶パラメータの温度補償 - Google Patents
液晶パラメータの温度補償Info
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- JPH04502486A JPH04502486A JP2514211A JP51421190A JPH04502486A JP H04502486 A JPH04502486 A JP H04502486A JP 2514211 A JP2514211 A JP 2514211A JP 51421190 A JP51421190 A JP 51421190A JP H04502486 A JPH04502486 A JP H04502486A
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/133382—Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
- C09K19/52—Liquid crystal materials characterised by components which are not liquid crystals, e.g. additives with special physical aspect: solvents, solid particles
- C09K19/58—Dopants or charge transfer agents
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K19/00—Liquid crystal materials
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B5/00—Optical elements other than lenses
- G02B5/30—Polarising elements
- G02B5/3016—Polarising elements involving passive liquid crystal elements
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/0009—Materials therefor
- G02F1/0063—Optical properties, e.g. absorption, reflection or birefringence
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/137—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering
- G02F1/139—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent
- G02F1/1396—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells characterised by the electro-optical or magneto-optical effect, e.g. field-induced phase transition, orientation effect, guest-host interaction or dynamic scattering based on orientation effects in which the liquid crystal remains transparent the liquid crystal being selectively controlled between a twisted state and a non-twisted state, e.g. TN-LC cell
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N9/00—Details of colour television systems
- H04N9/12—Picture reproducers
- H04N9/31—Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
- H04N9/3141—Constructional details thereof
- H04N9/315—Modulator illumination systems
- H04N9/3167—Modulator illumination systems for polarizing the light beam
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133536—Reflective polarizers
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/1333—Constructional arrangements; Manufacturing methods
- G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
- G02F1/133528—Polarisers
- G02F1/133543—Cholesteric polarisers
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- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Nonlinear Science (AREA)
- Crystallography & Structural Chemistry (AREA)
- Optics & Photonics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Mathematical Physics (AREA)
- Multimedia (AREA)
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- Liquid Crystal (AREA)
- Liquid Crystal Substances (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるため要約のデータは記録されません。
Description
【発明の詳細な説明】
液晶パラメータの温度補償
小さな螺旋ピッチを有するコレステリック液晶は、近年益々様々な新しい応用分
野、例えば偏光光源として〔例えば、ベレイエフ(Velayev)、 S、V
、等の論文: Jpn、J、 Appl、 Phys、、 1990.29゜N
o、 4.1634参照〕あるいはコレステリック被膜の色変化による温度表示
のために利用されるようになってきた。後者の応用では、コレステリック液晶の
螺旋ピッチの大きな温度依存性、その結果としてのその選択反射の色が利用され
ていることが知られている。
これにより、0.1℃の数倍程度の温度変化を、コレステリック被膜の選択反射
波長のシフトにより表示することが可能となる。
しかしながら、大きな温度依存性が所定の効果の達成を妨害もしくは不可能とす
る恐れがあることから、コレステリック液晶の選択反射の温度依存性がまったく
許されないか、あるいはほんの僅かしか許されないような用途もある。
キラルネマチック混合物の場合における螺旋ピッチの温度依存性が、右旋性並び
に左旋性の添加物をドープした場合には、低下する可能性があることが既に知ら
れている〔例えば、ゴブルーブンシx (Gobl−1!1unsch)、 A
、等の論文: Zeitschr、 Naturforsch。
1979、34a、 p、 594;ゲルペール(Gerber)、 P、、
Phys、Lett、。
1980、 No、 3.9.285を参照のこと〕。大きなピッチのコレステ
リック液晶を与えるこれらの公知の方法は、ネマチック電界効果の電気−光学的
特性の温度依存性の補償をもたらす。
小さなピッチのコレステリック液晶の選択反射バンドの平均値λ。の温度依存性
を補償する同様な方法は、従来未°知であったドーパントおよびその利用法が使
用し得る場合にのみ、適用可能であろう。
従って、本発明の目的は小さな螺旋ピッチを有するコレステリック被膜の選択反
射の温度補償法並びに該方法に適した混合物またはキラルドーパントを提供する
ことにある。
そのために、本発明によればネマチック液晶を、以下の条件を満足する少なくと
も2種のキラルドーパントと混合する:(1) a(cJ+ + Cd5) =
b(ctA+ +c*As) :および<2> 1/λ*(T) = a(C
+A+ + CJi) + aT(cJ+ + C11B2) + b’Ncl
A1十CJ*)
ここでA0は該選択反射の波長バンドの平均値を表し、CI+ C!+・・・は
該キラルドーバントの濃度を表し、かつまたAIおよびB1は以下の数列の係数
を表す。
n
(3) −= Ect [At +Bi (T−22℃)+Ct (T−22℃
)2〕λ。(T) i=1
・ [a+b (T−22℃)]
近似式(1)は以下のようにして導かれる。即ち、濃度Ctのn個のキラル添加
物をドープしたネマチック混合物のねじれ1/pの温度依存性は以下の式で表す
ことができる。
1 n
(4) −=Σct [At +8+ (T−22℃)+Ct (T−22℃)
’+−−−− 〕p(T) i=1
ここで、−次の項における係数B+は実質的に該ねじれの温度依存性を表す。平
均の屈折率1(T)の温度依存性(これはネマチック秩序度5(T)の温度値
浮性に比例する)を以下の関係:2no(T)+Δn (T)
(5) n(T) = = a + b (T−22℃)(ここで、Δnは光学
異方性を表し、noは該液晶の正則屈折率を表す)に従って考慮すると、n種の
キラル添加物をドープしたネマチック液晶からなる平坦なコレステリック被膜の
平均波長λ。
の温度依存性につき、以下の関係式が得られる:n
(6) −=ΣC+ [At +Bt (T−22℃)+CI (T−22℃)
2〕λ。(T) i=1
・[a+b (T−22℃月
2次以上の高次の項を無視すれば、この式は2種のキラル添加物を含む場合に対
して以下のようになる。
(2) 1/λo(T) = a(c+A++czAi) + aT(c+B+
+cJz) + bT(c、A++czA2)この場合においては、該2種のキ
ラル添加物のピッチは加法的作用を有していて、可視領域における選択反射に必
要とされる小さなピッチを与えなければならないので、係数A1およびA2は同
一の符号を有する、即ち以下の式を満足するものでなければならない:
(7) lc+A+ + C2A2 l≠0かくして、式(2)から、2種以上
のキラル添加物が以下の条件を満足する場合においてのみ、λ。の温度補償が可
能となることが導かれる。
(1) A(c+8. + C2B2) = b(c+A+ + C2A2)r
i(T)の温度依存性が無視し得る特殊な場合、即ちコレステリック相−等方性
相関の相転移温度よりも著しく低い温度T<<Teにおいては、式(])から、
2種のキラル添加物の場合の一次温度係数B、が逆の符号を有し、かつ条件:
c+8+= CJiを満足しなければならないことが導かれる。また、同様に、
螺旋ピッチの温度依存性が小さいか、あるいはn(↑)の温度依存性を丁度補償
するような性質のキラル添加物を使用することも可能である。このようにして、
λ。≠f(T)を得ることも可能であ乞。
以下に上記の2者のいずれかを満足する混合物の例2つを記載する。
混合物lは以下に詳細に記載されかつ以下の26種の成分から調合されたネマチ
ック液晶を76.0重量%で含み、以下のような右旋性のコレステリック添加物
でドープされている。
5、.0wt% ジエチル (4S、5S)−2−[trans−4−(p−シ
アノ7 x ニル)シクロヘキシル)−1,3−ジオキソラン−4,5−ジカル
ボキシレート
5、1wt% (R)−1−メチルヘプチル p−[(2S、 4R,5S)−
5−デシル−4−メチル−m−ジオキサン−2−イル〕ベンゾエート7、5wt
% 2.2’−p−フェニレンビス[(2S、 4R,5S)−4−メチル−5
−オクチル−m−ジオキサン〕
6、4wt% (R)−α−メチルヘプチル4’ −[: (2S、 4R,5
S)−4−メチル−5−オクチル−m−ジオキサン−2−イル]−4−ビフェニ
ルカルボキシレート
該ネマチック液晶は以下のように調合する。
2.0wt% 4−エチル−4−ビフェニルカルボニトリル2.0wt% 4′
−プロピル−4−ビフェニルカルボニトリル?、 0wt% 4−ペンチル−4
−ビフェニルカルボニトリル7、0wt% p−[trans−4−[(E)−
1+プレンテニル(plentenyl) )シクロヘキシル〕ベンゾニトリル
4、0wt% p−[trans−[(E)−プロペニル]シクロヘキシル〕ベ
ンゾニトリル
3、0wt% trans−4−(3−ブテニル)−trans−4’−(p−
フルオロフェニル) 〔ビシクロヘキシル〕
3、Qwt% trans−4−(p−フルオロ 7 x ニル) −tran
s−4’ −[(E)−プロペニル) [1,1°−ビシクロヘキシル]3、0
wt% 41−ペンチルCp−ターフェニル〕−4−カルボニトリル3、0wt
% 4’ −[transへ4−(3−ブテニル)シクロヘキシルクー4−ビフ
ェニルカルボニトリル
2、0wt% 4’ −[trans−4−C([1)−3−ペンテニルコシク
ロへキシルゴー4−ビフェニルカルボニトリル
2、0wt% 4’ −[trans−4−C(E)−プロペニルコシクロヘキ
シル〕=4−ビフェニルカルボニトリル
6.0wt% 1− [2−(trans−4−ブチルシクロヘキシル)エチル
〕−4−(trans−4−ペンチルシクロヘキシル)ベンゼン4、0wt%
1− [2−(trans−4−ブチルシクロヘキシル)エチル〕−4−[tr
ans−4−(4−ペンテニル)シクロヘキシル〕ベンゼン
3、0wt% 4−[2−(trans−4−ブチルシクロヘキシル)エチル]
−4゜−(trans−4−ペンチル−シクロヘキシル)−1,1°−エチレン
ジベンゼン
5、0wt% エチルp−[2−(trans−4−プロピルシクロヘキシル)
エチル〕フェニル エーテル
6.0wt% 、エチルpp−[2−(trans−4−ペンチルシクロヘキシ
ル)エチル〕フェニル エーテル
5.0wt% 4−trans−ペンチル−4’−trans−ビニル〔1,1
°−ビシクロヘキシル〕
6、0wt% メチルC4’ −trans−[(E)−プロペニル) [1,
1’−ビシクロヘキシル)−4−trans−イル〕メチル エーテル4.0w
t% 4’−trans−3−ブテニル[1,1’−ビシクロヘキシル〕−4−
trans−イル エチル エーテル3、0wt% trans−4−メトキシ
−trans−4’ −[(E)−3−ペンテニル〕〔ビシクロヘキシル〕
2.0wt% 1−エトキシ−4−[trans−4−[(E)−3−ペンテニ
ル]シクロヘキシル〕ベンゼン
3、0wt% (E)−2−ブテニル p−(trans−4−プロピルシクロ
ヘキシル)フェニル エーテル
4.0wt% (E)−2−ブテニル p−(trans−4−ペンチルシクロ
ヘキシル)フェニル エーテル
3.0wt% 1−エチル−4’−[trans−4−[(E)−3−ペンテニ
ル]シクロヘキシル〕ビフェニル
4、0wt% 1− [trans−4−[(E)−3−ペンテニルコシクロヘ
キシル〕−4′−プロピルビフェニル
3、0wt% p−[trans−4−(3−ペンテニル)シクロへキシル〕フ
ェニルtrans−4−プロピル−シクロヘキサンカルボキシレート
混合物IIは以下に詳細に記載されかつ以下の24種の各成分からなるネマチッ
ク液晶を75.1重量%で含み、以下の左旋性のコレステリック添加物でドープ
されている。
3、9wt% 16β−メチル−17−オキファントロスト−5−エン−3β−
イル アセテート
7、3wt% ビス1.(S)−1−メチルへブチル〕p−ターフェニル−4,
4”−ジカルボキシレート
6、9wt% ジブチル(4R,5R)−2−[trans−4−(p−シアノ
フェニル)シクロヘキシル:l−1,3−ジオキソラン−4,5−ジカルボキシ
レート
6.8wt% ジエチル(4R,5R)−2−[trans−4−(p−シアノ
フェニル)シクロヘキシル]−I、3−ジオキソラン−4,5−ジカルボキシレ
ート
このネマチック液晶は以下のようにして調合する。
3.0wt% 4−エチル−4−ビフェニルカルボニトリル3.0wt% 4′
−プロピル−4−ビフェニルカルボニトリル5、0wt% 4′−ペンチルー4
−ビフェニルカルボニトリル4、 0wt% p− [trans−4−(3−
ブテニル)シクロヘキシル〕ベンゾニトリル
8、 0wt% p− [trans−4− [(E)−1+ペンテニル]シク
ロへキシル〕ベンゾニトリル
3、 0wt% 4゛′−ペンチル−〈p−ターフェニル〉−4−カルボニトリ
月7
3、 0wt% 4’− [trans−4−(3−ブテニル)シクロヘキシル
〕−4ービフェニル力ルポニトリル
2、0wt% 4’− Ctrans−4− C(ε)−3−ペンテニルコシク
ロヘキシル〕−4−ビフェニルカルボニトリル
8、 0wt% l− C2−(tranS−4−ブチルシクロヘキシル)エチ
ル〕−4−(trans−4−ペンチルシクロヘキシル)ベンゼン2、 0wt
% 5− (trans−4−ペンチルシクロヘキシル)−2 [p−(tra
ns−4−プロピルシクロヘキシル)フェニル〕ピリミジン3、 ht% 4−
1 〔2−(trans−4−ブチルシクロヘキシル)エチル〕−4°−(t
rans−4−ペンチルシクロヘキシル)−1. 1’−エチレンジベンゼン
3、 0wt% p−シアノフェニルtrans−4− [2−(trans−
4−プロピルシクロヘキシル)エチルコシクロヘキサンカルボキシレート
7、 0wt% エチルp− [2−(trans−4−プロピルシクロヘキシ
ル)エチル〕フェニル エーテル
10、ht% エチルp− [:2−(trans−4−ペンチルシクロヘキシ
ル)エチル〕フェニル エーテル
6、0wt% 4−trans−ペンチル−4’−trans−ビニル〔1.1
’−ビシクロヘキシル〕
5、 0wt% 4’ −trans− (3−ブテニル) [:1.1’−ビ
シクロヘキシル〕−4−trans−イル エチル エーテル3、0wt% 4
’ −trans− (4−ペンテニル) [1,1’−ビシクロヘキシル〕−
4−trans −イル エチル エーテル3、 0wt% trans−4−
メトキシ−trans−4°−[(E)−3−ペンテニル]〔ビンクロヘキシル
〕
2、 0wt% 1−エトキシ−4− [trans−4− [:(E)−3−
ペンテニル〕シクロヘキシル〕ベンゼン
3、 0wt% (E)−2−ブテニルp− (trans−4−プロピルシク
ロヘキシル)フェニルエーテル
4、 0wt% (E)−2−ブテニルp− (trans−4−ペンチルシク
ロヘキシル)フェニルエーテル
3、 0wt% l−エチル−4’ − [trans−4− C (E)−3
−ペンテニル〕シクロヘキシル〕ビフェニル ・
4、 0wt% 1− [trans−4− [(E)−3−ペンテニルコシク
ロヘキシル〕−4′−プロピルビフェニル
3、 0wt% p− [trans−4−(3−ペンテニル)シクロヘキシル
〕フェニルtrans−4−プロピル−シクロヘキサンカルボキシレート
これら2種の混合物IおよびI+の測定した諸特性を以下の表に与える。
パラメータ 混合物I 混合物II
λ、 [run) 470 470
ΔλvwHs [nm〕35 35
dλ。/dT [no+/ ’ C) 0.10 −0.1OA [nm7wt
%) 6.02 6.02no 1.498 1.496
Δn O,1200,110
温度範囲[” C) O−500−50この表において、λ。は選択反射の平均
波長を表し、ΔA Flllll+4は該選択反射のバンド幅(FW)IMは半
最大値(half maximum)における全幅)を表し、dλ。/dTは動
作温度範囲におけるλ。の温度依存性を表し、Aは係数であって、ネマチック「
ホスト」物質で該コレステリック混合物をドープしたことによる、次式:λ。(
C): λ。+Aeに従うλ。(c)の増加を示し、Tcはコレステリック相−
等方性相聞の相転移温度である。
国際調査報告
m−^−自−−−PCT/C)! 90/i’1fl)Rn国際調査報告
Claims (1)
- 【特許請求の範囲】 1.温度補償された選択反射を有するコレステリック液晶混合物であって、以下 の条件: (1)a(c1B1+c2B2)=b(c1A1+c2A2);および(2)1 /λo(T)=a(C1A1+c2A2)+aT(c1B1+c2B2)+bT (C1A1+c2A2)(ここでλoは該選択反射の波長バンドの平均値を表し 、c1,c2,・・・は該キラルドーパントの濃度を表し、かつまたAiおよび Biは以下の数列: (3)▲数式、化学式、表等があります▼における係数を表す)を満足する少な くとも2種の添加物でドープしたネマチック液晶を含み、かつdλo/dT<0 .5nm/℃なる条件が該液晶混合物の動作温度範囲にわたり適合することを特 徴とする上記コレステリック液晶混合物。 2.コレステリック液晶の波長−選択反射の温度補償法であって、少なくとも2 種のドーパントが該液晶に添加され、該ドーパントが以下の条件: (1)a(c1B1+c2B2)=b(c1A1+c2A2);および(2)1 /λo(T)=a(c1A1+c2A2)+aT{c1B1+c2B2)+bT (c1A1+c2A2)(ここでλoは該選択反射の波長バンドの平均値を表し 、c1,c2,・・・は該キラルドーパントの濃度を表し、かつまたAiおよび Biは以下の数列: (3)▲数式、化学式、表等があります▼における係数を表す) を満足し、かつdλo/dT<0.5nm/°Cなる条件が該液晶混合物の動作 温度範囲にわたり適合することを特徴とする上記温度補償法。
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH3948/89-4 | 1989-11-01 | ||
CH394889 | 1989-11-01 |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH04502486A true JPH04502486A (ja) | 1992-05-07 |
JP2831463B2 JP2831463B2 (ja) | 1998-12-02 |
Family
ID=4266932
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2514212A Expired - Lifetime JP2809877B2 (ja) | 1989-11-01 | 1990-10-26 | 液晶を備えた光制御装置 |
JP2514211A Expired - Fee Related JP2831463B2 (ja) | 1989-11-01 | 1990-10-26 | 液晶パラメータの温度補償 |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2514212A Expired - Lifetime JP2809877B2 (ja) | 1989-11-01 | 1990-10-26 | 液晶を備えた光制御装置 |
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---|---|
US (1) | US5319478A (ja) |
EP (2) | EP0450025B1 (ja) |
JP (2) | JP2809877B2 (ja) |
KR (2) | KR100203549B1 (ja) |
DE (1) | DE59008313D1 (ja) |
HK (1) | HK17897A (ja) |
SG (1) | SG50560A1 (ja) |
WO (2) | WO1991006889A1 (ja) |
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WO2011153214A2 (en) | 2010-06-01 | 2011-12-08 | Ravenbrick Llc | Multifunctional building component |
EP2399972B1 (en) | 2010-06-25 | 2015-11-25 | Merck Patent GmbH | Liquid-crystalline medium and liquid-crystal display having high twist |
WO2013033608A2 (en) | 2011-09-01 | 2013-03-07 | Wil Mccarthy | Thermotropic optical shutter incorporating coatable polarizers |
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JPS6146030A (ja) * | 1984-08-10 | 1986-03-06 | Fujitsu Ltd | 加熱炉 |
JPS6281355A (ja) * | 1985-09-30 | 1987-04-14 | ヘキスト アクチェンゲゼルシャフト | メソゲニツク−カルボン酸の対掌性エステル、その製造方法および液晶相においてのド−ピング剤としてのその用途 |
JPS6281484A (ja) * | 1985-09-30 | 1987-04-14 | ヘキスト アクチェンゲゼルシャフト | 温度補整効果のあるド−ピング剤を含有する液晶相およびその用途 |
JPS6322893A (ja) * | 1985-08-02 | 1988-01-30 | Chisso Corp | 液晶組成物 |
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CH573126A5 (ja) * | 1974-06-07 | 1976-02-27 | Bbc Brown Boveri & Cie | |
US4073571A (en) * | 1976-05-05 | 1978-02-14 | Hughes Aircraft Company | Circularly polarized light source |
US4780240A (en) * | 1985-08-02 | 1988-10-25 | Chisso Corporation | Liquid crystal composition |
JPS6325626A (ja) * | 1986-07-18 | 1988-02-03 | Stanley Electric Co Ltd | 液晶表示素子 |
DE3824902A1 (de) * | 1988-07-22 | 1990-02-15 | Hoechst Ag | Optisch aktive, in 4-stellung einen mesogenen rest tragende 1,3-dioxolan-derivate, ein verfahren zu ihrer herstellung und ihre verwendung als dotierstoffe in fluessigkristallmischungen |
US5243451A (en) * | 1989-05-15 | 1993-09-07 | Ricoh Company, Ltd. | DAP type liquid crystal device with cholesteric liquid crystal birefringent layer |
US5235443A (en) * | 1989-07-10 | 1993-08-10 | Hoffmann-La Roche Inc. | Polarizer device |
DE59010516D1 (de) * | 1989-07-10 | 1996-10-31 | Hoffmann La Roche | Polarisator |
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- 1990-10-26 WO PCT/CH1990/000251 patent/WO1991006889A1/de not_active Application Discontinuation
- 1990-10-26 JP JP2514212A patent/JP2809877B2/ja not_active Expired - Lifetime
- 1990-10-26 KR KR1019910700666A patent/KR100203549B1/ko not_active IP Right Cessation
- 1990-10-26 EP EP90915403A patent/EP0450025B1/de not_active Expired - Lifetime
- 1990-10-26 US US07/690,894 patent/US5319478A/en not_active Expired - Lifetime
- 1990-10-26 DE DE59008313T patent/DE59008313D1/de not_active Expired - Fee Related
- 1990-10-26 WO PCT/CH1990/000250 patent/WO1991006613A1/de active IP Right Grant
- 1990-10-26 KR KR1019910700667A patent/KR920701862A/ko active IP Right Grant
- 1990-10-26 SG SG1996004990A patent/SG50560A1/en unknown
- 1990-10-26 JP JP2514211A patent/JP2831463B2/ja not_active Expired - Fee Related
- 1990-10-26 EP EP90915402A patent/EP0452438A1/de not_active Ceased
-
1997
- 1997-02-13 HK HK17897A patent/HK17897A/xx not_active IP Right Cessation
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Publication number | Priority date | Publication date | Assignee | Title |
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JPS6146030A (ja) * | 1984-08-10 | 1986-03-06 | Fujitsu Ltd | 加熱炉 |
JPS6322893A (ja) * | 1985-08-02 | 1988-01-30 | Chisso Corp | 液晶組成物 |
JPS6281355A (ja) * | 1985-09-30 | 1987-04-14 | ヘキスト アクチェンゲゼルシャフト | メソゲニツク−カルボン酸の対掌性エステル、その製造方法および液晶相においてのド−ピング剤としてのその用途 |
JPS6281484A (ja) * | 1985-09-30 | 1987-04-14 | ヘキスト アクチェンゲゼルシャフト | 温度補整効果のあるド−ピング剤を含有する液晶相およびその用途 |
Also Published As
Publication number | Publication date |
---|---|
KR100203549B1 (ko) | 1999-06-15 |
HK17897A (en) | 1997-02-13 |
KR920701862A (ko) | 1992-08-12 |
WO1991006889A1 (de) | 1991-05-16 |
EP0450025B1 (de) | 1995-01-18 |
KR920701393A (ko) | 1992-08-11 |
JP2809877B2 (ja) | 1998-10-15 |
US5319478A (en) | 1994-06-07 |
EP0452438A1 (de) | 1991-10-23 |
DE59008313D1 (de) | 1995-03-02 |
JP2831463B2 (ja) | 1998-12-02 |
WO1991006613A1 (de) | 1991-05-16 |
JPH04502524A (ja) | 1992-05-07 |
SG50560A1 (en) | 2000-10-24 |
EP0450025A1 (de) | 1991-10-09 |
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