DD139867A1 - APPLICATION OF LIQUID CRYSTALS - Google Patents

APPLICATION OF LIQUID CRYSTALS Download PDF

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Publication number
DD139867A1
DD139867A1 DD20970778A DD20970778A DD139867A1 DD 139867 A1 DD139867 A1 DD 139867A1 DD 20970778 A DD20970778 A DD 20970778A DD 20970778 A DD20970778 A DD 20970778A DD 139867 A1 DD139867 A1 DD 139867A1
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Prior art keywords
liquid crystals
reproduction
characters
light
modulation
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DD20970778A
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German (de)
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DD139867B1 (en
Inventor
Horst Zaschke
Hans-Matthias Vorbrodt
Dietrich Demus
Horst Kresse
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Horst Zaschke
Vorbrodt Hans Matthias
Dietrich Demus
Horst Kresse
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Application filed by Horst Zaschke, Vorbrodt Hans Matthias, Dietrich Demus, Horst Kresse filed Critical Horst Zaschke
Priority to DD20970778A priority Critical patent/DD139867B1/en
Priority to DE19792944905 priority patent/DE2944905A1/en
Priority to CH1003279A priority patent/CH642651A5/en
Priority to GB7941214A priority patent/GB2041354B/en
Priority to US06/102,944 priority patent/US4348324A/en
Priority to JP16091679A priority patent/JPS5585583A/en
Priority to FR7930612A priority patent/FR2444071A1/en
Priority to HU79FE1062A priority patent/HU184629B/en
Publication of DD139867A1 publication Critical patent/DD139867A1/en
Publication of DD139867B1 publication Critical patent/DD139867B1/en
Priority to US06/405,677 priority patent/US4565881A/en

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  • Heterocyclic Compounds That Contain Two Or More Ring Oxygen Atoms (AREA)

Abstract

Die Erfindung betrifft die Anwendung nematischer fluessiger Kristalle in optoelektronischen Anordnungen zur Modulation des durchgehenden oder auffallenden Lichtes sowie zur Wiedergabe von Ziffern, Zeichen und Bildern. Die bisher eingesetzten fluessigen Kristalle besitzen gewisse Nachteile, die in zu hohen Schmelzpunkten, zu niedrigen Klaerpunkten oder zu geringen Stabilitaeten gegenueber thermischer Belastung, Einwirkung von Licht, Chemikalien oder elektrischen Feldern oder stoerender Eigenfaerbung bestehen. Ziel der Erfindung sind nematische fluessige Kristalle mit guenstigen Eigenschaften hinsichtlich Schmelz- und Klaerpunkt, Stabilitaet gegenueber aeusseren Einfluessen sowie Farblosigkeit. Es wurde gefunden, dass kristallin-fluessige 2,5-disubstituierte Derivate des 1,3-Dioxans der allgemeinen Formel geeignet sind fuer den Einsatz in optoelektronischen Bauelementen zur Modulation des durchgehenden oder reflektierten Lichtes sowie zur Wiedergabe von Ziffern, Zeichen und Bildern. FormelThe invention relates to the use of nematic liquid crystals in optoelectronic arrangements for the modulation of continuous or incident light and for the reproduction of numbers, characters and images. The liquid crystals used hitherto have certain disadvantages which consist in too high melting points, too low Klaerpunkten or too low stability against thermal stress, exposure to light, chemicals or electric fields or disturbing self-staining. The aim of the invention are nematic liquid crystals with favorable properties in terms of melting and Klaerpunkt, stability against external influences and colorlessness. It has been found that crystalline-liquid 2,5-disubstituted derivatives of 1,3-dioxane of the general formula are suitable for use in optoelectronic components for the modulation of the transmitted or reflected light and for the reproduction of numbers, characters and images. formula

Description

Anwendung flüssiger KristalleApplication of liquid crystals

derthe

Die Erfindung betrifft die Anwendung nematischer flüssiger Kristalle in optoelektronischen Anordnungen zur Module lation des durchgehenden oder auffallenden Lichtes sowie zur Wiedergabe you Ziffern, Zeichen und Bildern«The invention relates to the application of nematic liquid crystals in optoelectronic arrangements for the module lation of continuous or striking light and to reproduce you numerals, signs and images «

Charakteristik der bekannten technischen LösungenCharacteristics of the known technical solutions

Es ist bekannt, daß in neraatisohen flüssigen Kristallen auf Grund ihrer optischen und dielektrischen Anisotropie verschiedene elektrooptisch Effekte auftreten, die zur Herstellung von optoelektronischen Bauelementen genutzt werden können /G» Meier, E. Sackmann, J0G. Grabraaier, Applications of Liquid Crystals, Springer--Verlag Berlin-Heid.elberg-New York 197,5; M. Tobias, International Handbook of Liquid Crystal Displays 1975-76, Ovum Ltd. London 1976/.Due to their optical and dielectric anisotropy, it is known that in electrochemical liquid crystals different electro-optical effects occur which can be used for the production of optoelectronic components. G Meier, E. Sackmann, J 0 G. Grabraaier, Applications of Liquid Crystals, Springer - Verlag Berlin-Heid.elberg-New York 197.5; M. Tobias, International Handbook of Liquid Crystal Displays 1975-76, Ovum Ltd. London 1976 /.

Von besonderem Interesse sind dabei Bauelemente auf der Basis verdrillter nematischer Schichten, deren Verdrillung unter Einwirkung des .elektrischen Feldes aufgehoben wira und infolge dessen Hell-Dunkel-Effekte auftreten. Voraussetsung für derartige Bauelemente ist der Einsatz nematische** Substanzen mit positiver dielektrischer Anisotropie, die sich an Verbindungen mit starker Längskomponente des Dipolmoisents findet« An Substanzen mit negativer dielektrischer Anisotropie tritt der dynamische Streueffekt aufj äeT ebenfalls für optoelektronische Bauelemente geeignet ist« . . .Of particular interest are components based on twisted nematic layers, whose twist is reversed under the influence of the electric field and as a result light-dark effects occur. The prerequisite for such components is the use of nematic substances with positive dielectric anisotropy, which can be found on compounds with a strong longitudinal component of the dipole monomer. On substances with negative dielectric anisotropy, the dynamic scattering effect is also suitable for optoelectronic devices. , ,

Die "bisher für optoelektronische Bauelemente eingesetzten Substanzen "besitzen sämtlich gewisse Nachteile, die in einem zu hohen Schmelzpunkt oder zu geringen Klärpunkt - oder geringer Stabilität gegenüber thermischer Belastung, Einwirkung von Licht und Chemikalien sowie elektrischen Feldern oder einer störenden Eigenfäxbung bestehen·The "substances hitherto used for optoelectronic components" all have certain disadvantages which consist in too high a melting point or too low clearing point or low stability to thermal stress, exposure to light and chemicals as well as electric fields or a disturbing self-fogging.

Ziel dergoal of

Das Ziel der Erfindung sind nematische flüssige Kristalle mit günstigen Eigenschaften hinsichtlich Schmelz- und Klärpunkt, Stabilität gegenüber thermischer Belastung, Einwirkung von Licht und Chemikalien sowie elektrischen Feldern und Farblosigkeit.The object of the invention are nematic liquid crystals with favorable properties in terms of melting and clearing point, stability to thermal stress, exposure to light and chemicals and electric fields and colorlessness.

Darlegung des Wesens der Erfindung Explanation of the essence of the invention

Es wurde gefunden, daß kristallin-flüssige 2,5-disubstituierte Derivate des 1,3-Dioxans der allgemeinen FormelIt has been found that crystalline liquid 2,5-disubstituted derivatives of 1,3-dioxane of the general formula

O-O-

wobeiin which

X =X =

oder X = ίΓ oder X « R-.or X = ίΓ or X «R-.

- und Y « R , und Y = R3- < <3) - ,- and Y «R, and Y = R 3 - <<3) -,

τ>3τ> 3

— und Y- and Y

- bedeuten.- mean.

sowiesuch as

CnH2n+1 C n H 2n + 1

»5 CnH2n+1CO°5 R ~ OCOO; c uH2n+1S; Cn"»5 C n H 2n + 1 CO ° 5 R ~ OCOO; c u H 2n + 1s; C n "

; CN; NO2; F; Cl; Br; NC-CH*=CH; NC-CH2-CH2; NC-CH2;; CN; NO 2 ; F; Cl; Br; NC-CH * = CH; NC-CH 2 -CH 2 ; NC-CH 2 ;

4-4- 4.4-4- 4.

UW J UK j UUUK J UUUUK JUW J UK J UUUK J UUUUK J

-R4 -R 4

5. mit η = 1 bis 105. with η = 1 to 10

bedeuten, geeignet sind für den Einsatz in optoelektronischen Bauelementen zur Modulation des durchgehenden oder reflektierten Lichtes sowie zur Wiedergabe von Ziffern, Zeichen und Bildern. ·mean suitable for use in optoelectronic components for the modulation of the transmitted or reflected light and for the reproduction of numbers, characters and images. ·

Die Substanzen besitzen relativ niedrige Schmelzpunkte bei hinreichend hohen Klärpunkten, sind stabil gegenüber Einwirkung von Wärme", Licht, Chemikalien und elektrischen Feldern* Di© Substanzen werden besonders vorteilhaft verviendet in Geraischen untereinander sowie in Gemischen mit anderen kristallin-flüssigen oder nicht kristallin-»flüssigen Substanzen. Die Substanzen mit 3 Ringen besitzen dabei die günstige Eigenschaft, die Klärpunkte von Gemischen erheblich zu erhöhen.The substances have relatively low melting points at sufficiently high clearing points, are stable to the action of heat, light, chemicals and electric fields. The substances are particularly advantageously used in mixtures with one another and in mixtures with other crystalline-liquid or non-crystalline liquids Substances The substances with 3 rings have the favorable property of significantly increasing the clearing points of mixtures.

für die entsprechend der Erfindung zu verwenden aen Substanzen sind in den folgenden Tabellen 1 bis 3 enthalten* aen to be used for substances according to the invention are contained in the following Tables 1 to 3 *

In üen Tabellen bedeuten: K= kristallin-fest, S^, Sß = smektisch A bzvi« B, N = nematiseh, I « isotrop-flüssig.Mean in ueen tables: K = crystalline-solid, S ^, S ß = smectic A bzvi "B, N = nematiseh, I" isotropic liquid.

Tabelletable R1 R 1 B1·B 1 · K2 K 2 KK / \ " \ // \ "\ / -- -- »5»5 ' · '· -R2 -R 2 NN 28,5) .28.5). ii II -- 40,540.5 -  - HOHO C7H15 C 7 H 15 \q—/\ Q / -- -- ** — —- - — »- » 25)25) 5353 Verb.Verb. C4H9 C 4 H 9 C3H7 C 3 H 7 SA S A -- 2626 29)29) 40)40) 50,550.5 1.11.1 C3H7OC 3 H 7 O . 107r-109 -, 107r-109 - -- ,5 (., 5 (. - (.- (. 22)22) 35,5) .35.5). 5656 1.21.2 C4H9 C 4 H 9 .'-.'- (.(. (.(. 34) .34). 43) .43). 5555 1.31.3 C5H41OC 5 H 41 O C4H9 C 4 H 9 « 43«43 (.(. '-'- — C·- C · 41) (.41) (. 41.5)41.5) 56,5) .56.5). 1.41.4 C6H13° C 6 H 13 ° C4H9 C 4 H 9 . 44, 44 . G., G. -  - - (.- (. (.(. 45)45) 48)48) illill C7H15OC 7 H 15 O C4H9 C 4 H 9 . 49, 49 - (.- (. 49 .-49 .- 35,5) .35.5). 1.61.6 C9H19OC 9 H 19 O 0A 0A . 31, 31 (.(. ~ (.~ (. 40-4 -40-4 - * -* - 1.71.7 CNCN . 45, 45 -- 38,5 -38.5 - 1.81.8 'C5H11 'C 5 H 11 4H114 H 11 . 47, 47 3B 3 B 34 (.34 (. 48)48) 1.91.9 C3H7OC 3 H 7 O f\ TT f \ TT . 42, 42 SrSr 45,5 -45.5 - 1.101.10 C4H9OC 4 H 9 O C5H11 C 5 H 11 . 38, 38 4444 5050 1.111.11 C5H11OC 5 H 11 O C5HC 5 H * · 1* · 1 ## 4646 4949 1.121.12 C6H13° C 6 H 13 ° C5H11 C 5 H 11 . 40, 40 ' · .'·. 4545 5353 1.131.13 C7H15OC 7 H 15 O C5H11 C 5 H 11 . 38, 38 50,5 .50.5. 5555 1.141.14 C9H19OC 9 H 19 O C5H11 C 5 H 11 . 44, 44 53,5 .53.5. 56,556.5 1.151.15 CNCN C5H11 C 5 H 11 . 45, 45 39)39) 1.161.16 C3H7 C 3 H 7 e6H13 e 6 H 13 . 48, 48 . «. · ~, ". · ~ 1*171 * 17 C4H9 C 4 H 9 C6H13 C 6 H 13 . 55, 55 40s5)40 s 5) 1.181.18 C6H13 C 6 H 13 C6H13 C 6 H 13 . 35, 35 1.191.19 C2H5OC 2 H 5 O C6H13 C 6 H 13 ..32..32 1.201.20 C3H7 C 3 H 7 C, H., 6 13C, H., 6 13 • 36 j• 36 y 1.2I1 1.2I 1 C4H9OC 4 H 9 O C6H13 C 6 H 13 . 48, 48 1.221.22 C5H11OC 5 H 11 O C6H13 C 6 H 13 . 40, 40 1.231.23 C6H13° C 6 H 13 ° C6H13 C 6 H 13 . 35,, 35, 1.241.24 C7H15 C 7 H 15 C6H13 C 6 H 13 . 37, 37 °9H19°° 9 H 19 ° G6H13 G 6 H 13 . 34, 34 1.261.26 Brbr C6H13 C 6 H 13 . 45, 45 1.271.27 HO2 HO 2 C6H13 C 6 H 13 .. 4848 1.281.28 GMGM C£H j. _. 6 13C £ H j. _. 6 13 . 56, 56 1.291.29 . 56, 56 1.301.30 . 47, 47

Fortsetzung TabelleContinued table

Verb. S,Verb S,

1.31 1.32 1.31 1.32

1.34 1.351.34 1.35

C6H13 C 6 H 13

CNCN

G6H13 C2H5O G 6 H 13 C 2 H 5 O

1,38 Br 1o39 CN1.38 Br 1o39 CN

C7H15 . 49 . 59,5 - -C 7 H 15 . 49. 59.5 - -

C7H15 . 37,5. 62 - -C 7 H 15 . 37.5. 62 - -

CA*„ . 54 - - (.52) C A * ". 54 - - (.52)

C8H17 . 38 . 60 - -C 8 H 17 . 38. 60 - -

C 55) . 43 . 62C 55). 43. 62

C8H17 .38 .60 . - -C 8 H 17 .38 .60. - -

C8H17 . 48,5(.44,5) - -C 8 H 17 . 48.5 (.44.5) - -

C8H17 . 60 - - (.51)C 8 H 17 . 60 - - (.51)

C8H17 . 55 - -C 8 H 17 . 55 - -

1.421:42

C4H9COO C5H11OCOOC 4 H 9 COO C 5 H 11 OCOO

-cooCOO

CH3G-(O)-COOCH 3 G- (O) -COO

id± CA, Q-(O) -cooid ± CA, Q- (O) -coo

-COOCOO

-COOCOO

1.46 NC1.46 NC

±*£L m2± * £ L m 2

1_«48 C6H15O C7H15 . -34 SB 68 C7H15 . 27 SA 301_ «48 C 6 H 15 OC 7 H 15 . -34 S B 68 C 7 H 15 . 27 S A 30

C7H15 . 80,5 - -C 7 H 15 . 80.5 - -

C7H15 C 7 H 15

i5"i5 "

C6H1-C 6 H 1 -

85 - 103 - -85 - 103 - -

C7H15 . 113 SA 166S5C 7 H 15 . 113 S A 166 S 5

. 143 - -, 143 - -

02N»<g)-C000 2 N »<g) -C00

. 132 - - , 132 - -

4242

148,5 193 174148.5 193 174

129 S. 182,5 . 221129 p. 182,5. 221

. 159, 159

Tabelle 2: R4-/")-^-R3 Table 2: R 4 - / ") - ^ - R 3

Vert».Vert ». R4 R 4 R5 R 5 KK 4444 8B 8 B NN II 2.1 2.22.1 2.2 C3H7 C6H13C 3 H 7 C 6 H 13 C4H9O C4H9OC 4 H 9 OC 4 H 9 O .26 .- 50'.26 .- 50 ' - '-- '- # •# •

. -0—. , -0-.

Tabelle 3: R -O-( ->- Table 3: R -O- (-> -

X)—' X) - '

Verb. R1 : ' R3 K S Sß NComp. R 1 : 'R 3 KSS ß N

C6H13° C4H9° * 136 ^* i24^ .166 - -3u C 6 H 13 ° C 4 H 9 ° * 136 ^ * i24 ^ .166 - -

3*2 CN C.HqO . 121 - . - - - . 202 .3 * 2 CN C.HqO. 121 -. - - -. 202.

3.3 CN C6H13 . 83 - - - - . 152 .3.3 CN C 6 H 13. 83 - - - -. 152.

Ausführungsbeispieleembodiments

Beispiel 1 5-n-Hexyl-2-i/~4~cyan-phenylJ7-1 ,3-Dioxan (Verbindung Nr. 1.30) Example 1 5-n-hexyl-2- i / 4-cyano-phenyl-J7-1,3-dioxane (Compound No. 1.30)

ist für optoelektronische Bauelemente auf der Basis verdrillter nematische! Schichten geeignet und zeigt folgende Ί5 Kenndaten:is for optoelectronic devices based on twisted nematic! Layers and shows the following Ί5 characteristics:

Meßtemperatur: 350C ·Measuring temperature: 35 0 C ·

Schwellspannung: 0,65 V/50 HzThreshold voltage: 0.65 V / 50 Hz

Anklingzeit tE (50 #) » 376 ms bei U « 1,3 V/50 HzOnset time t E (50 #) »376 ms at U« 1.3 V / 50 Hz

Abk3,ingzeit tA (50 95) = 190 ms, Schichtdicke 21yümAbk3 ing ing t A (50 95) = 190 ms, layer thickness 21yüm

Beispiel 2Example 2

Die Substatrz Kr. 1«33 (Tab. 1) besitzt 100C unter äem.Kläipunkt eine starke positive DK-Anisotropie νοηΛ£ = + 11.The substrate Kr. 1 «33 (Table 1) has a strong positive DK anisotropy νοηΛ £ = + 11 at 10 0 C below the apex point.

Claims (1)

Er f lud ungsans pr u c hHe f udans pr u c h 1. Substanzen für optoelektronische Bauelemente zur Modulation des durchgehenden oder reflektierten Lichtes sowie zur Wiedergabe von Ziffern, Zeichen . und Bildern,1. substances for optoelectronic components for the modulation of the transmitted or reflected light and for the reproduction of numbers, characters. and pictures, gekennzeichnet dadurch, daß kristallin-flüssige 2,5-disubstituierte Derivate des 1,3-Dioxans der allgemeinen Formelcharacterized in that crystalline liquid 2,5-disubstituted derivatives of 1,3-dioxane of the general formula —Y-Y wobei X.« R-1-^))- und Y = R2,where X.sup.R -1 - ^)) - and Y = R 2 , oder X = R4 und Y = R3~\^/- ,or X = R 4 and Y = R 3 ~ \ ^ / -, oder X * κ1~@- un<a Y = r5·"© " bedeutei1 sowieor X * κ1 ~ @ - un <a Y = r5 · "©" meaning and ; R4-(h)-C00;; R 4 - (h) -C00; Bx, NC-CH=CHj NC-CH2-CH2J NC-CH2; R2 « c n H2ü+i5 0H5 °N> 0h4; OCOR4; OCOOR4;Bx, NC-CH = CHj NC-CH 2 -CH 2 J NC-CH 2; R 2 "c n H 2 + u i 5 0H 5 ° N>0h4; OCOR 4 ; OCOOR 4 ; mit η - 1 bis 10with η - 1 to 10 bedeuten, eingesetzt werden.mean to be used.
DD20970778A 1978-12-13 1978-12-13 APPLICATION OF LIQUID CRYSTALS DD139867B1 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
DD20970778A DD139867B1 (en) 1978-12-13 1978-12-13 APPLICATION OF LIQUID CRYSTALS
DE19792944905 DE2944905A1 (en) 1978-12-13 1979-11-07 CRYSTALLINE-LIQUID SUBSTITUTED 1,3-DIOXANES AND MIXTURES CONTAINING THEM
CH1003279A CH642651A5 (en) 1978-12-13 1979-11-09 CRYSTALLINE-LIQUID SUBSTITUTED 1,3-DIOXANES AND MIXTURES CONTAINING THEM.
GB7941214A GB2041354B (en) 1978-12-13 1979-11-29 Liquid-crystalline 2,5-di substituted 1.3-dioxanes and mixtures containing these
US06/102,944 US4348324A (en) 1978-12-13 1979-12-12 Liquid crystalline substituted 1,3-dioxanes and mixtures containing these
JP16091679A JPS5585583A (en) 1978-12-13 1979-12-13 Substituted liquid crystal 1*33dioxane*its manufacture and liquid crystal composition containing it for photoelectric element
FR7930612A FR2444071A1 (en) 1978-12-13 1979-12-13 LIQUID CRYSTALS OF SUBSTITUTED 1,3-DIOXANES AND MIXTURE CONTAINING THEM
HU79FE1062A HU184629B (en) 1978-12-13 1979-12-13 Process for producing liquide-crystalline substituted 1,3-dioxanes
US06/405,677 US4565881A (en) 1978-12-13 1982-08-06 Liquid crystal substituted 1,3-dioxanes and mixtures containing them

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DD20970778A DD139867B1 (en) 1978-12-13 1978-12-13 APPLICATION OF LIQUID CRYSTALS

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US4273929A (en) * 1979-02-05 1981-06-16 Hoffmann-La Roche Inc. Heterocyclic compounds
US4298528A (en) 1980-03-28 1981-11-03 Timex Corporation Cyclohexyl-dioxane liquid crystalline compounds
US4313878A (en) 1980-12-03 1982-02-02 Timex Corporation 4-Substituted phenyl 4'-(5-n-alkyl-1,3-dioxan-2-yl)benzoates
US4322354A (en) 1979-03-05 1982-03-30 Timex Corporation 5-Substituted-2-(4-cyanophenyl)-1,3,-dioxanes
US4323471A (en) * 1980-12-11 1982-04-06 Timex Corporation Liquid crystal composition
US4323504A (en) * 1980-03-28 1982-04-06 Timex Corporation Cyclohexyl cyclohexyl dioxane liquid crystalline compounds and admixture containing same
US4323472A (en) * 1980-12-11 1982-04-06 Timex Corporation Liquid crystal admixture
US4323473A (en) * 1980-03-28 1982-04-06 Timex Corporation Cyclohexyl cyclohexyl dioxane liquid crystalline compounds and admixture containing same
US4325830A (en) 1980-12-24 1982-04-20 Timex Corporation Three ring dioxane liquid crystalline compounds
US4335012A (en) * 1980-04-03 1982-06-15 Timex Corporation 5-Substituted-2-(4-cyanophenyl)-1,3-dioxanes
US4335011A (en) * 1980-03-28 1982-06-15 Timex Corporation Cyclohexyl-dioxane liquid crystalline compounds
US4364838A (en) * 1979-11-14 1982-12-21 Hoffmann-La Roche Inc. Liquid crystal mixtures
US4450094A (en) * 1979-12-28 1984-05-22 Chisso Corporation Nematic liquid crystal compositions for display apparatuses
US4486332A (en) * 1981-08-18 1984-12-04 Veb Werk Fur Fernsehelektronik Im Veb Kombinat Mikroelektronik Liquid crystalline nematic substances

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JPS5695979A (en) * 1979-12-28 1981-08-03 Chisso Corp Nematic liquid crystal composition for display device
JPS56100886A (en) * 1980-01-18 1981-08-13 Chisso Corp Liquid crystal composition
DE3022818C2 (en) * 1980-06-19 1986-11-27 Merck Patent Gmbh, 6100 Darmstadt Liquid crystal display element
JPS5785881A (en) * 1980-11-14 1982-05-28 Seiko Epson Corp Liquid crystal composition
JPS57139074A (en) * 1981-02-20 1982-08-27 Chisso Corp P-(trans-5-alkyl-1,3-dioxane-2-yl)phenyl p- halogenobenzoate
DD204102A1 (en) * 1982-02-17 1983-11-16 Dietrich Demus APPLICATION OF NEMATIC LIQUID CRYSTALS
JPS58192878A (en) * 1982-05-07 1983-11-10 Chisso Corp 4-(trans-5-alkyl-1,3-dioxa-2-yl)benzoic acid trans-4'- alkylcyclohexyl ester
JPS59219382A (en) * 1983-05-27 1984-12-10 Chisso Corp Liquid crystal material

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US4273929A (en) * 1979-02-05 1981-06-16 Hoffmann-La Roche Inc. Heterocyclic compounds
US4389329A (en) * 1979-02-05 1983-06-21 Hoffmann-La Roche Inc. Meterocyclic compounds
US4322354A (en) 1979-03-05 1982-03-30 Timex Corporation 5-Substituted-2-(4-cyanophenyl)-1,3,-dioxanes
FR2450862A1 (en) * 1979-03-05 1980-10-03 Timex Corp DIOXANNYLPHENYL BENZOATES USEFUL AS LIQUID CRYSTALS AND ELECTRO-OPTICAL DISPLAY DEVICE CONTAINING THEM
US4364838A (en) * 1979-11-14 1982-12-21 Hoffmann-La Roche Inc. Liquid crystal mixtures
US4450094A (en) * 1979-12-28 1984-05-22 Chisso Corporation Nematic liquid crystal compositions for display apparatuses
US4323504A (en) * 1980-03-28 1982-04-06 Timex Corporation Cyclohexyl cyclohexyl dioxane liquid crystalline compounds and admixture containing same
US4323473A (en) * 1980-03-28 1982-04-06 Timex Corporation Cyclohexyl cyclohexyl dioxane liquid crystalline compounds and admixture containing same
US4335011A (en) * 1980-03-28 1982-06-15 Timex Corporation Cyclohexyl-dioxane liquid crystalline compounds
US4298528A (en) 1980-03-28 1981-11-03 Timex Corporation Cyclohexyl-dioxane liquid crystalline compounds
US4335012A (en) * 1980-04-03 1982-06-15 Timex Corporation 5-Substituted-2-(4-cyanophenyl)-1,3-dioxanes
US4313878A (en) 1980-12-03 1982-02-02 Timex Corporation 4-Substituted phenyl 4'-(5-n-alkyl-1,3-dioxan-2-yl)benzoates
US4323471A (en) * 1980-12-11 1982-04-06 Timex Corporation Liquid crystal composition
US4323472A (en) * 1980-12-11 1982-04-06 Timex Corporation Liquid crystal admixture
US4325830A (en) 1980-12-24 1982-04-20 Timex Corporation Three ring dioxane liquid crystalline compounds
US4486332A (en) * 1981-08-18 1984-12-04 Veb Werk Fur Fernsehelektronik Im Veb Kombinat Mikroelektronik Liquid crystalline nematic substances

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DD139867B1 (en) 1982-04-28
JPS6232193B2 (en) 1987-07-13
JPS5585583A (en) 1980-06-27

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