摘要:
The invention relates to the field of optical toys and amusement devices. More specifically, the invention is directed to specific immiscible liquid and semi-liquid compositions of different specific gravities and viscosities and their placement in enclosed spaces or chambers of various toy or entertainment devices thereby creating a multi phase liquid system having enhanced or dynamic visual effect. The invention employs a novel immiscible liquid mixture of hydrophobic alkane hydrocarbons and polar organic esters. In operation, as the two phase liquid system is agitated or otherwise energy stressed, the liquid of the heavier specific gravity flows through the liquid of the lighter specific gravity in distinct spaced apart beads or droplets under the influence of gravity.
摘要:
The invention relates to a combination of optical elements comprising at least one optical retardation film and at least one broadband reflective polarizer, characterized in that the optical retardation film is comprising at least one layer of an anisotropic polymer material having an optical symmetry axis substantially parallel to the plane of the layer, said optical retardation film being obtainable by polymerization of a mixture of a polymerizable mesogenic material comprising: a) at least one reactive mosogen having at least one polymerizable functional group; b) an initiator; c) optionally a non-mesogenic compound having two or more polymerizable functional groups; and d) optionally a stabilizer, and relates to an optical retardation film used in said combination of optical elements and to a liquid crystal display comprising said combination of optical elements.
摘要:
The invention provides a color-developing composition without using a pigment or dye and capable of being colored sustainably and stably after mixing two liquid phases which are colorless before mixing. The composition consists of two discrete liquid phases, wherein the refractive index of each liquid phase is identical to each other at a point within the wavelength range from 400 nm to 800 nm, wherein a continuous layer and a dispersion layer are formed by mixing and dispersing said two phases whereby developing a color. Alternatively, the composition is a powder dispersion consisting of a liquid phase and a silica powder-containing solid phase, wherein said liquid phase has a refractive index n1 and said silica has a refractive index n2, which satisfy Equation (1): nulln1-n2null
摘要:
The invention relates to polymerisable monocyclic compounds, their use in liquid crystal mixtures, polymers and polymer films, and the use of the compounds, mixtures, polymers and polymer films in optical, electrooptical and electronic devices, for decorative and security applications.
摘要:
A process for producing a liquid crystalline polymer with increased polymerization rate and reduced deposition of monomer-derived substances to the reaction vessel during production is provided. A liquid crystalline polymer having a constituent unit derived from 4-hydroxybenzoic acid in an amount 8 mol % or less is produced by conducting reaction at the presence of a catalytic amount of a catalyst comprising a potassium compound and a trivalent cobalt compound in combination.
摘要:
The present invention provides a liquid crystal composition comprising a liquid crystal compound having at least one polymerizable group, a photoreactive chiral compound, and a polymerization initiator, wherein a number average molecular weight of the photoreactive chiral compound is from 1,000 to 30,000. The present invention further provides a selectively reflective film including the liquid crystal composition as well as a liquid crystal color filter including the selectively reflective film.
摘要:
This invention provides a polymerizable liquid crystal compound having a large value of An/n, excellent in coating properties on an alignment film and easily aligned. Disclosed is a polymerizable liquid crystal compound having at least one polymerizable reactive group and showing nematic liquid crystal properties, having a nulln/n value of 0.14 or more wherein n is average refractive index and nulln is extraordinary light refractive index (ne) minus ordinary light refractive index (no), and being aligned by application onto an alignment film.
摘要:
To improve switching times, especially at low temperatures, one or more reactive liquid crystalline compounds is added to a liquid crystal mixture used in an electrooptical system. The electrooptical system comprises a PDLC film comprising a liquid crystal mixture forming micro-droplets in an optically isotropic, transparent polymer matrix between 2 electrode layers. The reactive liquid crystalline compounds are of formula II, RnullnullGnullnullRnull, wherein Rnull, Gnull and Rnull are as defined herein. The liquid crystal mixture comprises one or more compounds of the formula I 1 wherein R, A1, A2, Z1, Z2, X1, X2, Q, Y and n are as defined herein.
摘要:
Disclosed is a guest-host liquid crystal composition, comprising a host liquid crystal material and a dichroic dye mixed as a guest in the host liquid crystal material. The liquid crystal material has a condensed ring in its molecular structure, and the dichroic dye is a compound having a condensed ring bonded to the basic skeleton as a substituent.
摘要:
A method for making broadband cholesteric liquid crystals with improved bandwidth. The method includes the main steps of: (a) preparing a polymerization mixture containing first and second chiral liquid crystals, wherein the first chiral liquid crystal possesses a cholesteric liquid crystal phase and the second chiral liquid crystal possesses a helix-inversion characteristic, and at least one of the first or second chiral liquid crystals contains a polymerizable functional group; and (b) subjecting the polymerization mixture to a polymerization reaction, wherein the polymerization reaction is conducted such that the first chiral liquid crystal will go through a helix-inversion phenomenon. In a preferred embodiment, the second chiral liquid crystal has a temperature-dependent helicity which exhibits a helix inversion characteristic at a helix inversion temperature.