1772results about "Liquid crystal compositions" patented technology

The invention provides a liquid crystal composite for an active-matrix-addressed electro-optical display device and application of the liquid crystal composite. The liquid crystal compound comprises a compound with a general formula (I) which occupies 10 percent to 30 percent of the total weight of the liquid crystal composite, a compound with a general formula (II) which occupies 5 percent to 30 percent of the total weight of the liquid crystal composite, a compound with a general formula (III) which occupies 10 percent to 40 percent of the total weight of the liquid crystal composite, and a compound with a general formula (IV) which occupies 10 percent to 60 percent of the total weight of the liquid crystal composite. The liquid crystal composite provided by the invention has a relatively high response speed and good low temperature storage stability. The invention further provides the active-matrix-addressed electro-optical display device comprising the liquid crystal composite.

Embodiments of improved methods are provided to form ordered structures on a surface of a substrate using direct self-assembly (DSA) of ionic liquid crystals (ILCs). More specifically, various embodiments of methods are provided to control the pitch of a layered structure formed on a substrate surface via self-assembly of ILCs having cation head groups, alkyl tail groups and anions. In the embodiments disclosed herein, the pitch of the layered structure is controlled by: (a) controlling the cation / anion charge ratio of the cation head groups and anions included within the ILCs, and / or (b) adding an ionic liquid to a solution comprising the ILCs.

The invention belongs to the technical field of optical materials, and discloses a holographic polymer dispersed liquid crystal composition, a holographic grating and a preparation method. The composition comprises the following components in parts by mass: 0.5-1.5 parts of a photoinitiator, 2-5 parts of a co-initiator, 15-20 parts of a first monomer, 15-20 parts of a second monomer, 10-15 parts of a third monomer, 10-15 parts of a solvent and 10-20 parts of mixed liquid crystal. Wherein the first monomer is a monofunctional acrylic monomer, the second monomer is a bifunctional acrylic monomer, the third monomer is a polyfunctional acrylic monomer, the mixed liquid crystal comprises 10-25 wt% of a monomer liquid crystal and 75-90 wt% of a nematic liquid crystal, and the monomer liquid crystal contains fluorine as a benzene ring substituent and contains cyano or isothiocyano as an end group. Through cooperation of the monomer liquid crystal and the nematic liquid crystal in the mixed liquid crystal and cooperation of fluorine atoms and cyano / isothiocyano groups in the monomer liquid crystal, the holographic grating prepared from the composition has the characteristics of low haze and high diffraction efficiency, and the grating can be thinner, so that the requirements of light weight and clearness of AR glasses can be met.

A liquid crystal element includes two substrates with a transparent conductive film, the substrates being arranged such that transparent conductive films face each other, and a liquid crystal-polymer composite film which is sandwiched between the two substrates with a transparent conductive film, in which the liquid crystal-polymer composite film contains an acetylene alcohol.

Disclosed is a liquid crystal composition. The liquid crystal composition includes liquid crystal molecules including at least one of a liquid crystal compound having an alkenyl group and a liquid crystal compound having an alkoxy group, and a first stabilizer including a compound having a structure represented by Formula 1:where n is 0 or 1; m is 0 or 1; k is 0 or 1; Z1, Z2, and Z3 are each independently a single bond, —C═C—, —OCO—, —COO—, —CF2O—, or a C1 to C5 alkylene group; X1, X2, X3, and X4 are each independently hydrogen or halogen; Y is hydrogen, an alkylene group, an alkoxy group, a hydroxyl group, —NHCOCH3, or ═O; and A and B are cyclic compounds.

Provided is a liquid crystal alignment film which suppresses AC afterimage at a high level and which reduces charge accumulation and flicker due to backlight. The liquid crystal aligning agent contains the following polymer (A) and polymer (B). The polymer (A) is selected from the group consisting of polyimide precursors having formula (A1) and polyimides that are imides of the polyimide precursors. The polymer (B) is selected from the group consisting of polyimide precursors of formula (B1) and polyimides that are imides of the polyimide precursors, and the proportion of tetravalent organic groups represented by formula (X-10) is 40 mol% or more with respect to the total of 1 mol of tetracarboxylic acid residues of the polymer (B). # imgabs0 # (wherein the meaning of each symbol in the formula is as defined in the description. ) # imgabs1 # (* represents a bond).

The present invention relates to a liquid-crystal (LC) medium (as a subcategory of liquid crystal material), based on a mixture of polar compounds, to its use for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the vertically aligned mode, to an LC display of the vertically aligned mode comprising the LC medium, especially an energy-saving LC display and to a process of manufacturing the LC display.

The invention provides a liquid crystal aligning agent, a liquid crystal alignment film, a liquid crystal display element and a manufacturing method of the liquid crystal aligning agent. The liquid crystal aligning agent can obtain a liquid crystal alignment film which has excellent adhesion and can inhibit AC ghosting at a high level. A liquid crystal aligning agent containing a polymer component P containing one or more polymers, a compound C1, and a compound C2, the polymer component P containing at least one polymer p selected from the group consisting of polyimide precursors and polyimides that are imides of the polyimide precursors. Compound C1 is a compound having two or more structures represented by formula (c-1). The compound C2 is a compound represented by formula (c-2).

The invention discloses a preparation method of a 3MDT dimming film and application of the 3MDT dimming film to automobile glass, and relates to the technical field of dimming films. The preparation method of the 3MDT dimming thin film comprises the following steps: uniformly mixing isobornyl acrylate, a cross-linking agent and a photoinitiator, adding a functional filler, stirring and uniformly mixing, adding micromolecular nematic liquid crystal, and stirring to obtain a liquid crystal composite system; injecting the liquid crystal composite system into a liquid crystal box, and performing ultraviolet irradiation to obtain an interlayer film; two PET plastic films serve as substrates, the inner surfaces of the substrates are coated with ITO conductive coatings, the interlayer film is arranged between the two substrates, and the 3MDT dimming film is obtained. The prepared 3MDT dimming film has good heat insulation performance and mechanical performance, the interlayer film of the 3MDT dimming film has excellent hydrophobic performance, and the 3MDT dimming film is suitable for being applied to the aspect of automobile glass.

The invention provides a photo-thermal response T-type liquid crystal molecule, a preparation method thereof and application of the photo-thermal response T-type liquid crystal molecule to an intelligent window. The structural formula of the T-type liquid crystal molecule is shown in the formula (1). According to the technical scheme, the liquid crystal molecule is in a T type, an azobenzene structure in the liquid crystal molecule is subjected to reversible conversion of cis and trans under switching of ultraviolet light and visible light, and meanwhile, a molecular structure of 8CB and a butylene adipate structure can be subjected to phase change at room temperature, so that the molecule has a light response function, and meanwhile, the light response effect of the molecule is improved. The material also has a thermal response function at room temperature; besides passive control through light and heat, after electrification, liquid crystal molecules are arranged in order, an electric response function is achieved, and the intelligent window can be actively recovered to be transparent. The molecule not only has multiple responses, but also is a low-carbon environment-friendly material. According to the technical scheme, the alkoxy chain is linked to the side chain of the liquid crystal molecule, asymmetry is increased, the liquid crystal molecule has a richer phase structure, and the liquid crystal molecule has a huge development prospect in the field of intelligent windows.

The invention relates to the technical field of building energy-saving intelligent windows, and discloses a sunlight and heat radiation multi-adjustment intelligent window and a preparation method and application thereof. The intelligent window comprises an outer surface layer, a middle layer and an inner surface layer which are stacked in sequence. The outer surface layer comprises an infrared transparent layer, and an infrared reflecting layer and a doped vanadium dioxide layer which are respectively arranged on two opposite surfaces of the infrared transparent layer; the inner surface layer comprises a transparent substrate and a conductive layer attached to the surface of one side of the transparent substrate; the middle layer is a liquid crystal / polymer dimming layer, one side of the liquid crystal / polymer dimming layer is bonded with the infrared reflecting layer, and the other side of the liquid crystal / polymer dimming layer is bonded with the conductive layer. According to the intelligent window, multiple cooperative regulation and control of sunlight and heat radiation can be achieved, the regulation and control wave band is wide, the response speed is high, and the energy-saving effect is good. The regulation and control wave band covers visible light, near infrared and middle and far infrared ranges, reversible change can be realized along with the change of environment temperature, and all-year-round and all-weather energy saving is realized.

The present invention relates to an indene derivative of formula D as specified in claim 1, to a liquid crystal medium comprising a compound of formula D and to high- frequency components comprising these media, especially microwave components for high-frequency devices, such as devices for shifting the phase of microwaves, tunable filters, tunable metamaterial structures, and electronic beam steering antennas, e.g. phased array antennas.

Embodiments of improved methods and processes are provided for patterning a semiconductor substrate using direct self-assembly (DSA) of ionic liquid crystals (ILCs). In the disclosed embodiments, an ILC solution comprising ILCs is deposited on a variety of substrate surfaces. An upper surface of the ILC solution is exposed to a gas phase, non-polar solvent (such as, e.g., hexane gas). The gas phase, non-polar solvent provides an ambient environment that promotes self-assembly of the ILCs into vertically layered ILC structures.

Provided are: a liquid crystal aligning agent which contains two or more polyamic acids and in which deterioration in liquid crystal aligning properties when stored at room temperature is suppressed; a liquid crystal alignment film obtained from the liquid crystal aligning agent; and a liquid crystal display element. The liquid crystal aligning agent is characterized by containing the following polymer (A) and polymer (B). Polymer (A): a polyamic acid (A) having a structural unit derived from a tetracarboxylic acid derivative and a structural unit derived from a diamine, the polyamic acid containing, as the structural unit derived from the tetracarboxylic acid derivative, a structural unit (a-1Ta) represented by formula (1Ta), and containing, as the structural unit derived from the diamine, a structural unit (a-1Da) represented by formula (1Da), at least a part of the terminal of the polyamic acid (A) contains a non-amino group, the non-amino group is a functional group represented by structural formula (E), and the presence rate of the terminal amino group in the polyamic acid (A) is 60% or less based on the total terminal of the polyamic acid (A). Polymer (B): a polyamic acid (B) having a structural unit derived from a tetracarboxylic acid derivative and a structural unit derived from a diamine, the polyamic acid including a structural unit (b-1Tb) represented by formula (1Tb) as the structural unit derived from the tetracarboxylic acid derivative, and including a structural unit (b-1Db) represented by formula (1Db) as the structural unit derived from the diamine. (Definition of each symbol is as defined in the specification) (Definition of each symbol is as defined in the specification) (Definition of each symbol is as defined in the specification) (Definition of each symbol is as defined in the specification)

The invention provides a high-weather-resistance liquid crystal dimming film which is provided with a first conducting film, a liquid crystal dimming layer and a second conducting film, the liquid crystal dimming layer is located between the first conducting film and the second conducting film, the liquid crystal dimming layer contains liquid crystal, a polymer, a photoinitiator and a light stabilizer, the liquid crystal is nematic liquid crystal, and the polymer is a polymer. The polymer comprises at least one radical-initiated resin and at least one cation-initiated resin, the radical-initiated resin comprises at least one of acrylic resin or allyl resin, and the cation-initiated resin comprises at least one epoxy resin; the photoinitiator comprises at least one radical initiator and at least one cationic initiator, the mass percentage of the total mass of the photoinitiator and the liquid crystal dimming layer is 0.01-5%, the proportion of the cationic initiator is smaller than that of the radical initiator, and the weight percentage of the light stabilizer and the liquid crystal dimming layer is not higher than 0.05%. The liquid crystal dimming film disclosed by the invention is high in weather resistance.

The invention discloses a near-infrared dichroic dye, a liquid crystal composition and application of the near-infrared dichroic dye and the liquid crystal composition. The structural general formula of the disclosed dichroic dye is as shown in formula I in the specification. According to the invention, a hydrogenated quinoline ring, a hydrogenated benzopyran ring and a hydrogenated naphthalene ring are introduced into a molecular skeleton, so that the novel near-infrared dichroic dye with high light stability, high solubility, high order parameter and high light modulation capability is obtained. Compared with the near-infrared dichroic dye disclosed in the prior art, the absorption band is further subjected to red shift, and the light modulation capability is remarkably improved; ordering parameters are greatly improved, and the application bottleneck is solved.

The invention belongs to the technical field of liquid crystal alignment agents, and particularly relates to a liquid crystal alignment agent, a liquid crystal alignment film and a liquid crystal display element. The liquid crystal alignment agent comprises polyamic acid, a main chain of the liquid crystal alignment agent contains short side chain diamine and carbonate bonds, the short side chain diamine can slow down direct collision between film surfaces, carbonyl on a short side chain enhances absorption of ultraviolet light, and the compressive strength of a liquid crystal alignment film and the cracking alignment performance of the liquid crystal alignment film are improved; the carbonic ester bond can improve the voltage holding rate thermal stability of the liquid crystal alignment film and can improve the anchoring force of the liquid crystal alignment film and liquid crystals, the liquid crystal alignment agent with high compressive strength, voltage holding rate, high thermal stability and low linear polarization ultraviolet exposure is finally obtained, the stability of the high voltage holding rate improves the residual image of a display device, and the display effect is improved. And due to high compressive strength, the undesirable phenomenon of ZARA of the liquid crystal display device can be reduced.

The embodiment of the invention provides a liquid crystal composition and application thereof. The liquid crystal composition comprises an additive and three compounds with specific structures, and the liquid crystal composition is high in birefringence, appropriate in clearing point, not prone to crystallization at low temperature, good in high-temperature-resistant stability and anti-ultraviolet stability and beneficial to application in liquid crystal devices.

The invention refers in a first aspect to self-supporting film comprising green luminescent crystals (1), red luminescent crystals (2), and a polymer (3). The green luminescent crystals (1) are perovskite crystals. The red luminescent crystals (2) are zincblende or wurzite, preferably zincblende, crystals. A second aspect of the invention refers to a solid polymer composition (100). A third aspect of the invention refers to a light emitting device comprising either the solid polymer composition (100) or the self-supporting film.

The invention belongs to the technical field of high polymer materials, and particularly relates to a fluorescent liquid crystal polyurethane material as well as a preparation method and application thereof. According to the invention, hydroxyl and a flexible spacer-CH2-are introduced to cyanostilbene to synthesize a dihydroxyl-containing cyanostilbene compound as a dihydroxyl fluorescent liquid crystal monomer. A linear polyurethane material is prepared by taking a dihydroxyl fluorescent liquid crystal monomer and diisocyanate as raw materials, and a structural unit of cyanostilbene is directly introduced into a main chain structure of polyurethane in a chemical bonding manner, so that fluorescent / liquid crystal units are uniformly and stably distributed in a polymer main chain; the fluorescent liquid crystal polyurethane material integrating high mechanical property, good processability and stable fluorescence characteristic is obtained. The fluorescent liquid crystal polyurethane material can provide a multifunctional solution in wider fields of data storage, coding anti-counterfeiting, intelligent sensing, flexible electronics, shape memory materials, photoelectric display devices, optical fiber communication, biomedicine and the like.

LC media exhibiting a ferroelectric nematic phase at ambient temperature, comprising at least one or more compounds of formula IA having at least five rings,The mixtures are useful for electro-optics, electronics, electro-mechanic and other applications for materials with very high dielectric permittivity.

A liquid-crystal (LC) medium (as a subcategory of liquid crystal material), based on a mixture of polar compounds, its use for optical, electro-optical and electronic purposes, in particular in LC displays, especially in LC displays of the vertically aligned mode, an LC display of the vertically aligned mode comprising the LC medium, especially an energy-saving LC display, and a process of manufacturing the LC display.

The invention provides a high-reliability dye PDLC composition, a PDLC dimming film and a preparation method of the PDLC dimming film. The dye PDLC composition comprises the following components in percentage by weight: 35 to 67 percent of liquid crystal composition, 1 to 8 percent of dichroic dye, 30 to 60 percent of polymer precursor, 0.05 to 3 percent of photoinitiator and 0.2 to 1 percent of spacer particles. The dichroic dye comprises at least one kind of dichroic yellow dye, at least one kind of dichroic red dye, at least one kind of dichroic purple dye and at least one kind of dichroic blue dye. By selecting the specific dichroic dye, the PDLC dimming film is rich and changeable in color and particularly good in black display effect, has the high optical performance that the on-state haze is smaller than 4%, the off-state haze is larger than 95% and the contrast ratio is larger than 5, has excellent UV resistance and heat-resistant stability and is not prone to fading, and therefore the actual requirement for long-term use in various application scenes can be met.

The invention discloses a flexible PDLC (Polymer Dispersed Liquid Crystal) dimming film based on dichroic dye as well as a preparation method and application thereof, and belongs to the technical field of photoelectric materials. The problems that the current PDLC dimming film preparation process is not environment-friendly, the operation is complicated, the flexibility is poor and the like are solved. The preparation method of the flexible PDLC dimming film comprises the following steps: (1) mixing an ultraviolet curing adhesive, a nematic phase mixed crystal, a rigid spacer and a dichroic dye to obtain a mixture; (2) substrate treatment; and (3) filling the mixture between two flexible substrates, and curing with ultraviolet light. Volatile resin and ester plasticizers in a traditional formula are replaced with the ultraviolet curing adhesive, toxic and harmful substances are prevented from being used, the preparation process is environmentally friendly and safe, meanwhile, the conductive flexible substrate is combined with the ultraviolet curing adhesive, the limitation of a rigid substrate is broken through by means of high toughness of the ultraviolet curing adhesive, and the conductivity of the conductive flexible substrate is improved. By introducing the dichroic dye, the off-state transmittance is reduced, the contrast ratio is improved, and the long-term stability of the PDLC dimming film is enhanced.

A liquid crystal composition contains a side chain type polymer liquid crystalline compound which can form a light absorption anisotropic film having a high alignment degree and has excellent solubility in a general-purpose solvent, a light absorption anisotropic film obtained using the composition, a laminate, and an image display device. The composition includes: a side chain type polymer liquid crystalline compound; and a dichroic substance, in which the compound is a copolymer having a repeating unit (1) containing a mesogenic group with a molecular weight of greater than 280 and a repeating unit (2) with a molecular weight of 280 or less, a content of the repeating unit (2) is less than 14% by mass with respect to a total mass of the compound, and a content of the dichroic substance is greater than 2% by mass with respect to a total solid content of the composition.

Liquid-crystalline compounds with a terminal 5,6-difluoro-benzo[b]thiophene ring as provided by formula I, liquid crystal mixtures using the compounds, the use of the compounds in an electro-optical display, particularly in an active-matrix display based on the IPS or FFS effect, and liquid crystal displays that contain a liquid crystal material of this type.

The present invention provides: a liquid crystal alignment film which has good liquid crystal alignment properties, while having excellent pretilt angle developability; a liquid crystal display element which is provided with this liquid crystal alignment film; and a liquid crystal aligning agent which enables the achievement of this liquid crystal alignment film. The present invention provides a liquid crystal aligning agent which contains: as a component (A), a compound that has a thermally crosslinkable group and a photo-alignment group represented by formula (pa-1), wherein the thermally crosslinkable group is capable of forming a covalent bond by being reacted with a carboxy group; and as a component (B), a polyamic acid and a solvent. (In formula (pa-1), A represents a phenylene group or the like; R1 represents —COO— or —OCO—; R2 represents a cyclohexane-1,4-diyl group; R3 represents a cyclohexane-1,4-diyl group; R4 represents a linear or branched alkyl group having 1 to 40 carbon atoms, and some or all of the hydrogen atoms in this alkyl group may be substituted by fluorine atoms; D represents an oxygen atom, a sulfur atom or —NRd-; a represents an integer of 0 to 3; and * denotes a bonding position.)

The invention discloses an anionic surfactant and a preparation method and application thereof.The anionic surfactant has a double-wedge-shaped molecular structure, alkaline earth metal benzene sulfonate serves as a polar hydrophilic wedge tip, a long-chain alkoxy flexible chain segment serves as a hydrophobic wedge group, the surface tension of water can be remarkably reduced in an aqueous solution, and the anionic surfactant has excellent emulsifying capacity. The molecular structure is based on alkaline earth metal benzene sulfonate and has good thermotropic and lyotropic liquid crystallinity, the liquid crystal phase temperature range of the molecular structure exceeds 140 DEG C, and the phase transition temperature and the mesogenic state temperature range can be controlled by adjusting the number of carbon atoms of an alkoxy substituent. When in a mesogenic state, the molecules can form a supramolecular columnar phase through self-assembly aggregation, and the columnar structure can form a transmission channel with ion recognition in the column center direction. By utilizing the characteristic, a novel bionic ion selective conduction membrane can be constructed, and the biomimetic ion selective conduction membrane has wide application potential in the aspects of preparation of ion selective electrodes and chemical sensors and the like.

The invention discloses a liquid crystal composition, a display panel and a display device. The liquid crystal composition comprises a liquid crystal compound, a self-alignment compound and a polymerizable compound, the polymerizable compound comprises a first compound, and the first compound has a structural formula I shown as a formula I; the liquid crystal composition provided by the invention has the polymerizable compound, and a dibenzo five-membered ring containing X exists in the polymerizable compound, so that a rigid conjugated skeleton is formed, and the stability and migration rate of free radicals in the polymerizable compound in the ultraviolet irradiation process are enhanced; in addition, the rigid skeleton optimizes the molecular arrangement and reaction site accessibility of the polymerizable compound, so that the ultraviolet light irradiation efficiency is effectively improved, the residual quantity of the polymerizable compound is reduced, and the reliability of the display panel is improved.

Described herein are inhibitors of lipoprotein(a) (Lp(a)) assembly, methods of making such inhibitors, pharmaceutical compositions and medicaments comprising such inhibitors, and methods of using such compounds in the treatment of conditions, diseases, or disorders that would benefit from inhibition of Lp(a) assembly.