摘要:
An electrooptic device (2), and the methods for manufacturing, including a liquid crystal material (12) disposed between electroded flat glass or polymer substrates (4, 20) which have been precoated with a e.g. a chiral smectic surface layer (10, 14) in such way that the surface layer is able to mediate switching of the liquid crystal (12) between different optical states. The chiral smectic surface layer can be a polymer, oligomer or monomer liquid crystal with paraelectric, ferroelectric, ferrielectric or antiferroelectric response, which is insoluble in the liquid crystal used for the bulk (12) between the electroded substrates (4, 20). the switchable surface director enforces a certain orientation of the optic axis in the bulk liquid crystal (12), which can be a conventional non-chiral or chiral nematic or smectic in a twisted or non-twisted configuration.
摘要:
Compounds of the general formula C.sub.m H.sub.2m+2, wherein m signifies 10 to 35, are added to liquid crystalline nematic substances to shorten the switching time of the substances when used in opto-electronic components.
摘要:
Nematic liquid crystalline mixtures, which can be used in optoelectronic components. Compounds are provided which influence the characteristics of mixtures in the direction of high clarification temperatures at simultaneous favorable switching times. It has been found that compounds of the general formula ##STR1## wherein n, m=1 to 10 in nematic mixtures in quantities of 5 to 40% considerably increase the clarification points without significantly increasing the viscosity, so that favorable switching times are obtained. The new mixtures can be used for the production of optoelectronic components (displays) for watches, computers and other devices.
摘要:
A nematic liquid crystal mixture for modulation of the transmitted or incident light and for rendition of colored numerals, symbols and images in electro-optical devices, the said mixture comprising(a) a nematic liquid crystal adapted for reorientation in an electrical field due to its dielectric anisotropy and(b) a dichroic dyestuff adapted for simultaneous orientation changes together with the said nematic liquid crystal between a light absorption and a light transmission position based on the guest-host effect, the said dyestuff being an s-tetrazine derivative having an elongate molecular structure and having the formula ##STR1## wherein X is ##STR2## R.sup.1 and Y is R.sup.2 -- or ##STR3## R.sup.1 being H--, F--, Cl--, Br--, J--, O.sub.2 N--, NC--, HO--, H.sub.2 N--, C.sub.n H.sub.2n+1 NH--, C.sub.n H.sub.2n+1 (CH.sub.3)N--, C.sub.n H.sub.2n+1" --, C.sub.n H.sub.2n+1 O--, C.sub.n H.sub.2n+1 S--, C.sub.n H.sub.2n+1 COS--, C.sub.n H.sub.2n+1 COO--, C.sub.n H.sub.2n+1 OOC--, C.sub.n H.sub.2n+1 CO-- or C.sub.n H.sub.2n+1 OCOO--, andR.sup.2 being H--, F--, Cl--, Br--, J--, O.sub.2 N--, NC--, HO--, H.sub.2 N--, C.sub.n H.sub.2n+1 NH--, C.sub.n H.sub.2n+1 (CH.sub.3)N--, C.sub.n H.sub.2n+1 --, C.sub.n H.sub.2n+1 O--, C.sub.n H.sub.2n+1 S--, C.sub.n H.sub.2n+1 COS--, C.sub.n H.sub.2n+1 COO--, C.sub.n H.sub.2n+1 OOC--, C.sub.n H.sub.2n+1 CO-- or C.sub.n H.sub.2n+1 OCOO--, andR.sup.3 being H--, F--, Cl--, Br--, J--, CH.sub.3 -- or CF.sub.3 --, andR.sup.4 being H--, F--, Cl--, Br--, J--, CH.sub.3 --, or CF.sub.3 --,n is a positive integer.
摘要翻译:一种向列型液晶混合物,用于调制透光或入射光,并用于在电光装置中再现有色数字,符号和图像,所述混合物包括(a)适于由于其电场而在电场中重新取向的向列型液晶 介电各向异性和(b)适于与所述向列型液晶同时取向改变的二色性染料在基于客体主效应的光吸收和透光位置之间,所述染料是具有细长的四 分子结构并具有下式的化合物,其中X为R 1,Y为R 2,或者R 1为H,F-,Cl-,Br-,J-,O 2 N-,NC-,HO- ,CnH2n + 1NH-,CnH2n + 1(CH3)N,CnH2n + 1“,CnH2n + 10,CnH2n + 1S-,CnH2n + 1COS-,CnH2n + 1COO-,CnH2n + CnH2n + 1CO-或CnH2n + 1OCOO-,R2为H,F-,Cl-,Br-,J-,O2N-,NC-,HO-,H2N-,CnH2n + 1NH-,CnH2n + )N,C n H 2n + 1,C n H 2n + 10,C n H 2n + 1S-,C n H 2n + ,CnH2n + 1COO-,CnH2n + 10OC-,CnH2n + 1CO-或CnH2n + 10COOO-,R3为H,F-,Cl-,Br-,J-,CH3-或CF3-,R4为H- ,F-,Cl-,Br-,J-,CH 3 - 或CF 3 - ,n是正整数。
摘要:
The invention relates to the application of nematic liquid-crystalline substances in electro-optical device elements for the display of numbers, symbols and images.Such nematic liquid crystals having low melting points and extremely high temperatures of transparency.The nematic liquid-crystalline substances are 5-alkyl-2-[4-acyloxyphenyl]-pyrimidines having the general formula ##STR1## wherein ##STR2## R.sup.1 =C.sub.n H.sub.2n+1, C.sub.n H.sub.2n+1 O, C.sub.n H.sub.2n+1 OCOO, C.sub.n H.sub.2n+1 COO, C.sub.n H.sub.2n+1 S, F, Cl, Br, NO.sub.2, CN CF.sub.3R.sup.2 =C.sub.n H.sub.2n+1n denotes any of the numbers between 1 and 10.These substituted pyrimidines are used in electro-optical device elements singly or as mixtures of each other, as well as mixtures with other liquid-crystalline or non liquid-crystalline components.
摘要:
Devices useful for storage of information which comprises mixtures of suitable chiral materials with nematic liquid crystals and in which by irradiation with light of two different wavelengths the chirality of the mixture can be reversibly switched between two stable states of different chirality, corresponding to two states of different optical properties.
摘要:
A nematic liquid crystal composition having a low viscosity is provided, which composition is obtained by mixing two kinds of liquid crystal compositions having a difference of evaporation heats of 800 cal/mol or more and forming no complex; and by notably reducing its viscosity as compared with its ideal viscosity, improvement in the response speed of display element has become possible.
摘要:
Nematic liquid crystalline substances as additives in mixtures for electro-optical systems for the rendition of numbers, symbols and images. The additives provide new liquid crystalline substances of broad mesophase ranges which improve the chemical stability of the substance mixtures. It has been found that liquid crystalline 5-alkyl-pyridine-2-carboxylic acid esters of the general formula ##STR1## are suitable for utilization in mixtures for electro-optical displays for the rendition of numbers, symbols and images.
摘要翻译:向列液晶物质作为电子光学系统的混合物中的添加剂,用于数字,符号和图像的再现。 这些添加剂提供了广泛的中间相范围的新的液晶物质,可改善物质混合物的化学稳定性。 已经发现,具有通式为:图像的液晶5-烷基 - 吡啶-2-羧酸酯,R1 = OCnH2n + 1,CN ,C n H 2n + 1其中m,n = 1至8适用于电光显示器用于再现数字,符号和图像的混合物中。
摘要:
A mixing component for nematic liquid-crystalline substances used in optoelectronic components for the rendition of numbers, symbols and images. The object of the invention is to reduce, in components for nematic liquid crystal substances, the threshold and operating voltages. It has been found, that the addition of one or more 1-oxa-2,6,7-trioxane-1-phospha-bicyclo-derivatives having the general formula ##STR1## wherein ##STR2## with R.sup.1 =C.sub.n H.sub.2n+1 --, C.sub.n H.sub.2n+1 O--, C.sub.n H.sub.2n+1 COO--, C.sub.n H.sub.2n+1 OCOO--, R.sup.2 +C.sub.n H.sub.2n=1 --with n=an integer from 1 to 10to nematic liquid crystal substances, considerably reduces the operating voltage.
摘要:
The invention relates to liquid crystal nematic substances for electro-optical devices for the modulation of light, for the reproduction of numerals, signs and images as well as an orienting medium for spectroscopy and gas chromatography.It was found that compounds containing two or three rings, connected by carboxyl groups are new liquid crystal nematic substances of the general formula ##STR1## where R.sup.1 =C.sub.n H.sub.2n+1, CN; R.sup.2 =C.sub.m H.sub.2m+1, CN;R.sup.3 =H, CH.sub.3, C.sub.2 H.sub.5 Cl, Br; x=0 or 1; m,n=numbers from 1 to 10 are suitable for electro-optical arrangements for the modulation of transmitted or reflected light as well as for the reproduction of numeral signals and images, and further, as an orienting medium for spectroscopy and gas chromotography.Other liquid crystal substances or non-liquid crystalline substances, particularly dyes, may be added to the substances according to the invention.