DD158480A3 - APPLICATION OF CRYSTALLINE LIQUID SUBSTANCES - Google Patents

Abstract

The invention relates to the use of nematic crystalline liquid substances in optoelectronic arrangements for the modulation of the transmitted or incident light and for the display of numbers, characters and images. The object of the invention is the use of new crystalline liquid substances in optoelectronic devices, d. have low threshold voltages at high Klaerpunkten. The object of the invention is the use of novel crystalline liquid biphenyl or terphenylanaloger heterocyclic compounds in optoelectronic devices. It has been found that novel nematic crystalline liquid 2,5-disubstituted 1,3-dithiane d. general formula alone, in mixtures with each other and with other crystalline liquid or non-crystalline liquid compounds, in particular dyes, are used in optoelectronic arrangements.

Description

227952 O

Title of the invention

Application of crystalline-liquid substances

Field of application of the invention

The invention relates to the use of nematic] 'crystalline substances in optoelectronic arrangements for the modulation of the transmitted or incident light and for the representation of numerals, characters and images.

Characteristic of the known technical solutions

Nematic liquid crystals have been used as dielectrics for several years in opto-electronic devices. Mo 'Tobias, International Handbook of Liquid Crystal Displays 1975-76 Ovum Ltd. London 1976; G-. Meier, E. Sackmann, J ₀ Go G-rahmaier, Applications of Liquid Crystals Springer-Verlag, Berlin-Heidelberg-lJew York 1975 / ·

There are already a large number of crystalline-liquid substances known / D. Has already been proposed for use in optoelectronic devices Liquid crystals' tables YEB Yerlag for basic industries Leipzig _1974/5 and many of them are / D: Demus, H. Demus, H. Zaschke. Demus in: "ITemissive Electrooptic Displays ¹¹ , Ed, by RoA ₀ ICmet" and F ₉ K. v. Willisen, Plenum Press Hew York-London 197o ρ _o 83-117; G ₀ -v / eber, P, del Pino, L For the technical application in optoelectronic components, the liquid crystals must have certain properties with regard to melting and clearing point, dielectric and optical anisotropy, viscosity and chemical and thermal stability so far no pure connection,

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which has all the required properties. Therefore, mixtures of substances are always used. In order to adapt the mixtures to the requirements, one constantly looks for new compounds with specific properties that can be used as components.

Object of the invention

The goal of the "invention is the application of new crystalline-liquid substances" in optoelectronic devices, which at high clearing points on low threshold voltages on v / iron.

Explanation of the invention's W

The invention has for its object to use new crystalline biphenyl or "terphenylanaloge heterocyclic compounds in optoelectronic devices,

It has been found that novel nematic crystalline liquid 2,5-disubstituted 1,3-dithiane of the general formula

where or or or or s owi e

_Ώ 4

= Xi -

A. -

and Y = R ² ,

r and Y = R,

and Y =

> -R ⁴ ,

- and Y =

- and Y

- and Y =

- ^ ³

^R = ^C n ^H 2n ₊ r>

₊ 1 ° -> ^C n ^H 2n ₊ 1 ^C0 ° - '

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-COO-, R-YH) -COO-, -CH ₅ -ITO ₉₅ -Cl, -Br, -CH = CH-CK-, -CH ₂ -CH ₂ -ClT,

^r2 = ^C n ^H 2n ₊ r> - ^0Η '- ^CW ' ° η ^Η 2η ₊ 1 ° - ' ^C n ^H 2n-M ^G0 ° ^C n ^H 2n ₊ 1 ^0G00 ' ^C n ^{R =} ° η ^Η 2η + Γ

^r4 = ^η Η 2η ° ₊ Γ '° ^η Η 2η ₊ 1 ° -'^{C1> Bl>> OT> m} 2 with η = 1 to 10

mean,

can be used alone, in mixtures with one another and with other crystalline liquid or non-crystalline liquid compounds, in particular "dyes, in optoelectronic arrangements for modulation of the continuous or incident light and for the representation of numerals, characters and images chemically and thermally stable, colorless and, depending on the type of special molecule construction, have particularly high clearing points or, low threshold voltages in optoelectronic components »

Execution examples

example 1

Table 1 contains the conversion terms of compounds according to the invention. It means: K = crystalline-solid

ίί = nematic

S-o = smectic B

ID

I = isotropic-liquid

Table 1 :

2ο br 3ο HC 5 4th NC 5 = NC 6th NC 7th ITC 8th. NU 10 9 o C.

11o 12.

13. HO

£> 6 ^Η 13

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K 57 S _B 146 IK 96 I

K 84 I

K 99 I

K 156 Έ 245 IK 155 IT 232 IK 160 N. 251 I i: 127 H 215 1 K 111 IT 164 IC 140 N 184 IK 134 H 178 IK 134 Ii 221/222 IK 127-128 I

Example 2

A "binary His RECOVERY lir of 60 mol / S compound. 6 and 40% m.ol- ΈΤο 12 melts su isotropic a nematic liquid crystal and s v / ill be at 200 ⁰ C at 103 ⁰ C. The binary I.iischung v / ird is filled in an optoelectronic cell, which

20 ^{consists of} , for example, obliquely vapor-deposited transparent electrodes (glass panes steamed with tin dioxide and silicon oxide) arranged at a distance of 10 μm from each other in parallel

ind. The

In the case of an overflow, a homogeneous orientation of the nematic liquid is present. As a result of the positive dielectrics

See Anisotropie finds when applying electric fields of

~

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Ji'reedericksz effect instead. At 90 ^° C., the threshold voltage of the dielectric reorientation is 1.4 volts. When observed between crossed polarizers, the array becomes opaque at about 3V.

Claims (1)

• χ - 6'- 227952 invention claim 1. Application of new nematic crystalline liquid substances for optoelectronic arrangements for the modulation of the transmitted or incident light and for the display of numerals, characters and images, characterized in that new crystalline liquid 2,5-disubstituted 1,3-dithiane of the general formula where Σ = H ¹ -> - and Y = R ² , and Y = R ² , and Y = R ⁴ - and 'Y = R 0; - and Y = R ³ , or X = R ⁴ - / uN- and Y = R ⁴ . ^C n ^H 2n ₊ 1 ^0C00 - ' R ⁴ - <f5> -GOO-, R-ZJN-COO-, -ClI-, -ITO ₂ , -Cl, -Br, -CH = CH-CH, -CH ₂ -CH ₂ -CN, R ^r2 = ^CH - ' ^0H ' ^CN ' ^C n ^H 2n-M ° -> ^C n ^H 2n-M ^G0 ° -' d> _, ι η _ x. - V ^ _{2n +} I ^r4 - ^C n ^H 2n ₊ r> ^C n ^H 2n ₊ 1 ⁰ - ^ ^{C1 '3} ^ ^{GiT' IT0} 2 mean with n = 1 "to 10, alone, in mixtures with one another and with v / ei t he s kristallin- liquid or non-crystalline liquid compounds, in particular dyes, are used, - 7 -