36results about "Liquid crystal compositions" patented technology

This invention relates to cholesteric liquid crystal (LC) displays comprising cells of well-defined shape, size and aspect ratio which cells are filled with a liquid crystal composition preferably containing dichroic dye(s), and novel processes for their manufacture.

The present invention relates to a liquid crystal alignment layer composition showing excellent adhesive strength to a substrate and a liquid crystal layer and excellent homeotropic alignment of liquid crystals, a liquid crystal alignment layer prepared with the same, a preparation method of the liquid crystal alignment layer, an optical film including the liquid crystal alignment layer, and a display device including the same. According to the present invention, provided are a liquid crystal alignment layer composition which comprises 1-50 wt % of a photocurable resin binder, 0.01-5 wt % of an amine compound selected from the group consisting of primary and secondary amino-based coupling agents, 0.1-5 wt % of a photoinitiator, and the remainder solvent; a method for preparing a liquid crystal alignment layer by coating the substrate with the liquid crystal alignment layer composition, removing the solvent, and curing the liquid crystal alignment layer composition; an alignment layer which is prepared with the liquid crystal alignment layer composition of the present invention; an optical film which comprises the substrate, the alignment layer, and a liquid crystal layer formed on the alignment layer; and a display device including the optical film. The liquid crystal alignment layer formed with the liquid crystal alignment layer composition of the present invention has excellent adhesive strength to the substrate and to an upper liquid crystal layer, and provides excellent homeotropic alignment to liquid crystals. The optical film of the present invention can be applied to a polarizer by itself and can be very helpfully used as a retardation film or a view angle compensation film in various types of LCD modes such as IPS mode and the like.

High molecular liquid crystal obtained by photopolymerizing a liquid crystal composition which comprises CH2=CHCOO-X-OC6H4-C6H4CN (X is an alkylene group) and CH2=CHCOOC6H4-C6H4CN. An optical element which is a polarized hologram element made by using the high molecular liquid crystal and an optical head having the polarized hologram element as a beam splitter.

A red-colored film in which when an elliptically polarized light is incident on the film in a direction 45° aslant from a normal line direction with respect to a surface of the film, a light transmitted through the film has an average amplitude transmittance ratio (av. tan Ψ) in a wavelength region of 575 to 635 nm, which satisfies the following equation (1):

0.960<av. tan Ψ<1.040   (1).

A red-colored composition contains a red pigment A having a BET specific surface area in the range from 90 to 140 m²/g, a red pigment B having a BET specific surface area in the range from 70 to 85 m²/g, and a pigment carrier formed of a transparent resin, a precursor of the transparent resin or a mixture of the tarns parent resin and precursor thereof. A color filter has the red-colored film as a red color filter segment. The liquid crystal display device includes the color filter.

The present invention provides: a composition for forming a liquid crystal alignment film capable of forming a liquid crystal alignment film excellent in evenness; and a liquid crystal display device. The present invention provides a composition for forming a liquid crystal alignment film, wherein the composition comprises: a material for forming a liquid crystal alignment film; 4,6-dimethyl-2-heptanone; diisobutyl ketone; and at least one of γ-butyrolactone and N-methyl-2-pyrrolidone as solvents.

A polymerizable monomer adopted to a display panel is represented as following chemical formula:

wherein, m≧0; “Z” is selected from oxygen, sulfur, carbonyl, caroboxyl, methyoxy, methylthio, thio, ethenylcarbonyl, carbonylethenyl, difluoromethoxy, difluoro methylthio, ethyl, difluoroethane, 1,2 difluoroethane, vinylene, difluoroethenylene, ethynyl, or single bond. “X₁” and “X₂” are independently selected from oxygen, sulfur, methyoxy, carbonyl, caroboxyl, -carbamoyl, methylthio, ethenylcarbonyl, carbonylethenyl, or single bond. “Sp₁” and “Sp₂” are independently a spacer or single bond. “P₁” and “P₂” are independently a polymerizable group.

The present invention restricts the fluctuation of a gap among individual display devices. The display device includes two substrates which are arranged to face each other in an opposed manner with a liquid crystal material therebetween, an annular sealing material which is arranged on peripheries of the substrates, a first region which includes an image display region, and a second region which is separated from the first region by the partition member.

A display system includes: a screen in which, in an area on which invisible light is incident, a scattering state where visible light is scattered and a transmission state where visible light is transmitted are switched; an image projection system to project an image of the visible light onto the screen; and an invisible light projection system to project the invisible light onto the screen and to cause an area of the screen onto which a desired portion of the image is projected to have the scattering state.

The invention relates to a perovskite quantum dot-doped polymer dispersed liquid crystal and a preparation method thereof. The perovskite quantum dot-doped polymer dispersed liquid crystal is preparedfrom the following components, in parts by mass: 1-10 parts of perovskite quantum dots, 20-74 parts of a photosensitive polymer, 20-78 parts of a nematic liquid crystal, and 1-5 parts of a photoinitiator. The obtained perovskite quantum dot-doped polymer dispersed liquid crystal is applied to a random laser. The raw materials of the dispersed liquid crystal are simple and easy to obtain, the costs are low, and the obtained random laser has the characteristics of a short preparation period, a simple preparation process, low production costs, higher emission light intensity and a low thresholdvalue, so that the dispersed liquid crystal has broad application prospects.

To provide a liquid crystal composition having at least one or a suitable balance regarding at least two of characteristic such as high maximum temperature of a nematic phase, low minimum temperature thereof, small viscosity, suitable optical anisotropy, large dielectric anisotropy, large specific resistance, high stability to ultraviolet light or heat; an AM device having short response time, a large voltage holding ratio, a large contrast ratio, long service life and so forth. The liquid crystal composition has positive dielectric anisotropy and contains a specific compound having high maximum temperature and large refractive index anisotropy as a first component, and may contain a specific compound having large positive dielectric anisotropy as a second component, a specific compound having high maximum temperature or small viscosity as a third component or a specific compound having negative dielectric anisotropy as a fourth component, and a liquid crystal display device includes the composition.

The present invention relates to a liquid crystal composition and application thereof. The liquid crystal composition provided by the present invention comprises at least one or more compounds represented by a general formula I and one or more compounds represented by a general formula II. The liquid crystal composition has a low rotational viscosity, can effectively improve the response time ofa liquid crystal display, in addition, has the function of chelation ions, is extremely effective for improving afterimages and Flicker performance of the liquid crystal display, improving the displayeffect of the liquid crystal display and improving the quality of the liquid crystal display, and is suitable for VA/MVA/PVA/PSVA and other VA liquid crystal display devices and IPS and FFS mode liquid crystal display device.

The invention provides a temperature-sensitive color-developing liquid crystal microcapsule. The liquid crystal microcapsule comprises a core material and a wall material, the core material is cholesteric liquid crystal, and the wall material is formed by interfacial polymerization of a polyacyl chloride compound and a polyamine compound. The invention also discloses a preparation method of the temperature-sensitive color-developing liquid crystal microcapsule. According to the temperature-sensitive color-developing liquid crystal microcapsule, different colors can be displayed along with temperature changes in different temperature ranges according to different liquid crystal formulas used as core materials, and the solvent resistance can be greatly improved while the reflectivity is notinfluenced, so that the stability of the liquid crystal microcapsule is improved, and the application range of the liquid crystal microcapsule is expanded.

A manufacturing method of a display device is provided, which includes applying first electric charges on a surface of a printing drum to form an electric charge film, patterning the electric charge film to form an electric charge film pattern, applying development material having second electric charges to the electric charge film pattern to form a printing pattern, and adhering the printing pattern to a substrate to form a patterned film of the display device. In one embodiment, the printing pattern is a color filter pattern and the patterned film is color filters of the display device.

The invention discloses a preparation method of a liquid crystal material of an aromatic metal polymer of which the main chain contains ferrocenyl. The preparation method comprises the following steps of 1, mixing 1,1-ferrocenyl diformyl chloride and an aromatic monomer, 2, orderly adding an organic solvent and a catalyst into the mixture in an inert gas protective atmosphere, 3, carrying out a stirring reflux reaction process at a temperature of 0 to 75 DEG C for 4 to 16 hours, 4, after the reaction, carrying out filtration, 5, carrying out reduced pressure distillation of the filtrate, 6, carrying out extraction or dissolution of the concentrate by dichloromethane, 7, washing the extract or the solution by water, or precipitating the extract or the solution by methanol, 8, collecting the organic phase, and carrying out distillation or pumping filtration to obtain precipitates, and 9, carrying out vacuum drying to obtain the aromatic metal polymer of which main chain contains ferrocenyl. The preparation method has simple processes. The product obtained by the preparation method has excellent heat stability and liquid crystal performances.

A liquid crystal display device includes a display element with a pair of substrates, a liquid crystal layer between the substrates, and an alignment film on a surface of at least one substrate facing the layer; a pair of polarizers on both surfaces of the liquid crystal element to sandwich the liquid crystal element; and at least one optical phase element between at least one of the polarizers and the liquid crystal element, wherein an optical refractive ellipsoid of the optical phase element is tilted clockwise or counterclockwise from the normal of a surface of the optical phase element, wherein at least one of rates of variation of an ordinary refractive index and an extraordinary refractive index of a liquid crystal material of the liquid crystal layer with respect to a wavelength is set in a range where viewing angle dependent coloring does not occur on a screen.

The invention relates to the field of functional polyimide materials, and particularly discloses a liquid crystal orientation agent and application thereof. The liquid crystal orientation agent comprises polyimide, wherein a repeating structural unit of polyimide is shown as a general formula (I) in the description. The preparation method of polyimide comprises the steps of prepolymerization, ring formation, spinning, washing and the like. The liquid crystal orientation agent can be used for preparing a liquid crystal orientation film and a liquid crystal element, and the prepared liquid crystal element has the characteristics of high voltage retention rate under high-temperature work and low charge accumulation under long-time work.

The invention discloses a 2-methyl-1,3-dioxepane derivative. The structural general formula of the compound is as shown in the formula I. The compound is stable in structure, has a wide liquid crystal state temperature range, good low-temperature intersolubility and large dielectric anisotropy delta epsilon, can be used for realizing a low threshold voltage and low rotary viscosity gamma 1 when being used in an optical device, can be used for improving the performances of a liquid crystal composition material and a display device, and has great significance in quick response of the display device. A liquid crystal composition containing the compound can be applied to preparation of liquid crystal display devices with low driving voltage, wide temperature range and quick response speed. The formula I is as shown in the specification.

The invention belongs to the technical field of optical film materials, and relates to a preparation method of a distorted grain boundary phase-A liquid crystal mixed material with a wide temperaturerange. The method comprises the following steps: mixing phase-A-cholest-N*phase transformed liquid crystal molecules, nematic phase micromolecular liquid crystals and nematic phase-smectic phase liquid crystal molecules to obtain a distorted grain boundary phase A, obtaining a wide-temperature-range distorted grain boundary phase A by controlling a mixing ratio of the molecules in the mixing process, thus obtaining the wide-temperature-range TGBA phase; and adding chiral additives into the proportioned TGBA phase to adjust an initial reflection wave site when the liquid crystal mixed materialis in the TGBA phase. The liquid crystal mixed material provided by the invention has wider TGBA phase temperature range, the initial (cooling process) reflection wave site when the liquid crystal mixed material is in TGBA phase can be adjusted at the same time, and the experimental process is simple and easy to operate.

The invention discloses a photo-orientation material, a liquid crystal display panel and a preparation method thereof. A chemical structural formula of the material comprises a first group, a second group, a third group and a fourth group, which are connected in sequence, wherein the first group is a group with an orientation anchoring function; the second group is a chaining group; the third group is a group with one or multiple light-sensitive cyclohexanone structural formulas; the fourth group is an alignment group with linear-chain type or branched-chain type alkyl with 3 to 15 carbon atoms. With the adoption of the manner, a preparation technology flow of the liquid crystal display panel can be simplified and the quality of a product is improved.