摘要:
Arylazo and poly(arylazo) dyes having at least one core radical selected from naphthyl or anthracyl and having at least one 2,3-dihydro-1,3-dialkyl perimidine substituent, a guest-host composition comprising a liquid crystal host solvent and the arylazo or poly(arylazo) dichroic dye, and a liquid crystal display comprising the guest-host composition, are disclosed.
摘要:
This invention is a polymerizable nematic monomer composition comprising (A) 20 to 80 weight % of at least one monomer having the following general formula wherein n is 10, 12 or 14, and (B) 80 to 20 weight % of at least one monomer having the following general formula wherein n is 4, 6 or 8: ##STR1## wherein R is CH.sub.3 or H and Y is covalent bond or --CO.sub.2 --.
摘要:
A liquid crystal polymer film or fiber comprising polymeric liquid crystals having aligned multiple oriented mesogens and a process for preparing such a polymeric liquid crystal film or fiber comprising aligning in a multi-oriented state a nematic or smectic monomeric mesophase (liquid crystal monomer) and photopolymerizing the mesophase, are disclosed. The film or fiber may be adhered to a substrate, part of a liquid crystal display cell, or a free standing polymeric film or fiber. According to a preferred process, the mesophase is aligned in a multi-oriented state using linearly polarized light.
摘要:
The present invention provides a process for preparing an optical alignment layer for aligning liquid crystals and liquid crystal displays comprising exposing polyimide layers with polarized light. The invention further describes optical alignment layers, liquid crystal displays incorporating optical alignment layers and novel polymer compositions within the class of polyimide, polyamic acids and esters thereof.
摘要:
The present invention provides a process for preparing an optical alignment layer for aligning liquid crystals and liquid crystal displays comprising exposing polyimide layers with polarized light. The invention further describes optical alignment layers, liquid crystal displays incorporating optical alignment layers and novel polymer compositions within the class of polyimide, polyamic acids and esters thereof.
摘要:
The present invention relates to amine compositions and the preparation of polyimides. The polyimides can be used for inducing alignment of a liquid crystal medium with polarized light in liquid crystal display elements.
摘要:
A process for inducing pre-tilt in alignment of a liquid crystal medium comprising exposing at least one optical alignment layer, comprising anisotropically absorbing molecules and hydrophobic moieties, to polarized light; the polarized light having a wavelength within the absorption band of said anisotropically absorbing molecules; wherein the exposed anisotropically absorbing molecules induce alignment of the liquid crystal medium at an angle + and -.theta. with respect to the direction of the polarization of the incident light beam and along the surface of the optical alignment layer, and induce a pre-tilt at an angle .PHI. with respect to the surface of the optical alignment layer and applying a liquid crystal medium to said optical alignment layer, is described. The invention also is directed to liquid crystal display elements made by the process of the invention and to novel polyimide compositions that are useful as optical alignment layers in the invention.
摘要:
Organosilicon polymers, including crosslinked polymers and crosslinkable prepolymers, of cyclic polysiloxanes, organic dyes, and, optionally, polyenes. The dyes include those with delocalized Pi electron systems linking electron donor groups and electron acceptor groups, and with at least two carbon-carbon double bond-containing pendant groups attached to at least two different sites from among the indicated delocalized Pi electron systems, donor groups, and acceptor groups. Also disclosed are optical substrates coated with the organosilicon crosslinked polymers exhibiting second order non-linear optical susceptibility.
摘要:
Organosilicon polymers, including crosslinked polymers and crosslinkable prepolymers, of cyclic polysiloxanes, organic dyes, and, optionally, polyenes. The dyes include those with delocalized Pi electron systems linking electron donor groups and electron acceptor groups, and with at least two carbon-carbon double bond-containing pendant groups attached to at least two different sites from among the indicated delocalized Pi electron systems, donor groups, and acceptor groups.
摘要:
The present invention is directed to liquid cyrstalline polyesters which are soluble and have low melting points. Preferably the solubility in halogenated solvent is greater than 10 wt. % and the crystalline melting point is less than 125.degree. C. The polyesters are thermotropic and nematic, and preferably have a number average molecular weight from 1,000 to 25,000. The polyesters include a cyclohexane ring in the backbone and are more particularly main-chain thermotropic polyester which contain trans-1,4 cyclohexane dicarboxylate mesogens and flexible spacer groups. These compositions are useful in coating applications including floor coverings.