352 results about "Liquid crystalline" patented technology

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.

The invention provides a driving method of a display panel, a driving circuit and a display device.In the driving method of the display panel, reference voltage and environment temperature form a first mapping table, target electrical parameters of the display panel and the environment temperature form a second mapping table, and a temperature sensing module is adopted to detect the environment temperature of the display panel; the method comprises the following steps: acquiring a corresponding detection voltage, comparing the detection voltage with a changing reference voltage, acquiring a target reference voltage according to an overturning state of a level signal obtained by comparison, and acquiring a current environment temperature according to the target reference voltage; various target electrical parameters of the display panel are determined according to the environment temperature and the second mapping table, parameter adjustment of the display panel is carried out, linkage adjustment of the multiple different electrical parameters is achieved, it is guaranteed that the display panel obtains different voltage setting and driving voltages at the current environment temperature, the effectiveness of low-temperature compensation is improved, and the user experience is improved. The deflection consistency of the liquid crystal is realized, and the display effect is improved.

The invention relates to the technical field of wireless communication and sensing, and particularly discloses a holographic amplitude weighting-based two-dimensional antenna array multi-beam scanning method, which comprises the following steps of: determining the position information of each radiation unit in a two-dimensional antenna array, including calculating the interval and the arrangement mode of the units; an amplitude weighted value of each radiation unit is generated according to the target wave direction, a two-dimensional multi-beam holographic amplitude weighting technology is used, and the radiation unit amplitude weighted values are determined through the two-dimensional multi-beam holographic amplitude weighting technology; generating a corresponding binary discretization coding sequence based on the amplitude weighted value so as to control the excitation amplitude of each radiation unit; and designing a liquid crystal-based Ka-band two-dimensional holographic beam scanning leaky-wave antenna square array, and regulating and controlling a radiation pattern of a two-dimensional antenna array through the coding sequence to realize multi-beam scanning.

Provided is a liquid crystalline polyester fiber capable of achieving improved weatherability without kneading a UV absorber into the fiber or attaching a weatherable UV absorber after fiber spinning. The liquid crystalline polyester is a fiber that consists essentially only of a liquid crystalline polyester, in which the amount of UV absorber used is 5 mass % or less, and the strength retention in the weather fastness test with xenon arc lamp light in accordance with JIS L 0891 is 60% or more.

The present disclosure relates to a laundry treating apparatus for positioning a liquid crystal at the center of a manipulation portion when a display including a liquid crystal is installed inside a rotating manipulation portion.

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.

The invention discloses a control method of a micro light-emitting unit array display, electronic equipment of the micro light-emitting unit array display and a computer program product. In the display process of the current frame, the micro light-emitting unit array display adopts a preset scanning time sequence to sequentially scan the backlight of each pre-divided partition; and when the target partition backlight is scanned, backlight control is performed based on the response stage of the liquid crystal corresponding to the partition: the target partition backlight is closed when the liquid crystal is in the turnover stage, and the target partition backlight is opened based on the target brightness when the liquid crystal is in the stable stage. By means of accurate matching of the backlight switch and the response state of the liquid crystal, smear and ghosting generated when the liquid crystal is displayed in the overturning process can be avoided, and therefore dynamic blurring is effectively reduced, and the definition of a moving picture is improved. Meanwhile, the method does not need a complicated frame insertion frequency multiplier circuit or whole-screen black frame insertion, so that the excellent dynamic display performance can be realized with lower cost on the premise of keeping higher brightness output.

The invention discloses a liquid crystal performance prediction method and device based on molecular dynamics and a liquid crystal theory, and relates to the technical field of liquid crystal performance prediction.The method comprises the steps that the molecular structure of liquid crystal to be simulated is confirmed, and the molecular structure of the liquid crystal is obtained; generating a coarse graining molecular structure and a coarse graining force field parameter through a coarse graining scheme; constructing a nematic phase initial structure of the volume phase system; performing molecular dynamics simulation at a set temperature to obtain molecular dynamics simulation trajectory data, calculating to obtain a molecular director of liquid crystal molecules, and determining an overall director; a second-order-sequence parameter and a fourth-order-sequence parameter are obtained through calculation; constructing a correlation function and fitting to obtain the rotation relaxation time of the system; according to a Nemtsov-Zakharov formula or a Fialkowski formula, the rotary viscosity of the liquid crystal is obtained through calculation; constructing a change relation of the second-order-sequence parameter along with the temperature; and performing fitting analysis through a Maier-Saupe theory or a critical index formula to determine a phase change point. The liquid crystal performance prediction efficiency can be improved, the cost is reduced, and the prediction precision is improved.

The present invention relates to a reprocessable or recyclable cured liquid crystal epoxy resin that can be reprocessed or recycled, a re-cured product thereof, and a method for producing same. More specifically, provided are: a cured liquid crystalline epoxy resin which is obtained by reacting an epoxy compound and in which a plurality of thermotropic liquid crystal materials are bound each other with a curing agent; a re-cured product thereof; and a method for producing same. The liquid crystalline epoxy resin cured material according to the present invention has excellent physical properties and thermal conductivity, can be reprocessed and recycled through eco-friendly processes while maintaining said properties, and thus can be used as an eco-friendly polymer material in various fields.

The liquid crystal temperature control structure comprises an air channel, a wind power unit and an adjusting plate, the air channel is provided with a first end and a second end which communicate with each other, the first end is used for air entering, and the second end is used for outputting air to liquid crystal; the wind power unit is arranged at the first end; the adjusting plate is arranged between the first end and the second end, is in sliding connection with the air duct, and can slidably move along the cross section of the air duct to adjust the cross section area of air capable of passing through the air duct. The position of the adjusting plate can be correspondingly adjusted according to the liquid crystal temperature height, the air flow in the air channel is changed, when the liquid crystal temperature is high, the adjusting plate moves to the position away from the air channel, the air flow in the air channel is increased, and liquid crystal heat dissipation is accelerated; when the liquid crystal temperature is low, the adjusting plate moves towards the position close to the air channel, the air flow in the air channel is reduced, even the air channel is completely closed by the adjusting plate, no air in the air channel flows to the second end, the liquid crystal generates heat, and the temperature of the liquid crystal is gradually increased, so that the temperature of the liquid crystal is controlled.

The present invention relates to an energy-efficient light valve comprising an LC material which is switchable between an optically transparent state and an opaque state and to the use of the light valve in spatial light modulators for handling occlusion in near-eye displays.

Disclosed herein are to peptide bundlemers that possess one or more hydrophobic groups on the surface that are capable of assembling into lattice nanostructures, amorphous networks and liquid crystalline structures in solution. Methods of creating these structures and articles formed from these structures are also disclosed.

The present invention relates to an injectable pre-formulation comprising:a) at least one of a mono-, di- or tri-acyl lipid and / or a tocopherol;b) optionally at least one phospholipid;c) at least one biocompatible, organic solvent; andd) at least one prostacyclin analogue or a salt thereof;wherein the pre-formulation forms, or is capable of forming, at least one liquid crystalline phase structure upon contact with excess aqueous fluid. Such compositions may additionally comprise polar co-solvents. Methods of treatment, particularly for management of pulmonary artery hypertension (PAH), severe PAH, Raynaud's disease, ischemia and related conditions are provided, as well as corresponding uses of the compositions. Administration devices comprising the formulations and kits comprising the devices are also provided.

The invention discloses supramolecular liquid crystal cream and a preparation method thereof, and relates to the technical field of cosmetic preparation. Comprising 0.3%-2% of supramolecular 10-hydroxydecanoic acid-alpha-bisabolol, 1.5%-5% of an emulsifier, 0.5%-3% of behenyl alcohol, 6.8%-23% of an emollient, 1.5%-6% of an emulsion stabilizer, 0.95%-2.85% of a thickener, 5%-14% of a humectant, 0.6%-1.8% of a preservative and a proper amount of water. Wherein the emulsion stabilizer comprises cetostearyl alcohol, and the mass ratio of the cetostearyl alcohol to the behenyl alcohol is (0.5-2): (0.5-3); the thickening agent comprises at least one of xanthan gum, microcrystalline cellulose / cellulose gum and bentonite. The specific thickening agent and the long-chain fatty alcohol emulsion stabilizer are added into the supramolecular system, so that ordered arrangement of liquid crystals in the supramolecular system is remarkably promoted, the mechanical strength of the lamellar liquid crystals is improved, and the stability of the supramolecular liquid crystal system is further improved.

The phase-patterned liquid crystal elastomer according to an embodiment of the present invention includes: a first region including liquid crystals; and a second region which is adjacent to the first region, includes liquid crystals, and includes a phase different from that of the first region.

The application relates to the field of wireless communication and sensing technology, and particularly discloses a two-dimensional antenna array multi-beam scanning method based on holographic amplitude weighting, which comprises the following steps: determining the position information of each radiation unit in the two-dimensional antenna array, including calculating the unit spacing and arrangement mode; generating the amplitude weighting value of each radiation unit according to the target wave direction; using the two-dimensional multi-beam holographic amplitude weighting technology, the amplitude weighting value of the radiation unit is determined through the two-dimensional multi-beam holographic amplitude weighting technology; generating the corresponding binary discretization coding sequence based on the amplitude weighting value to control the excitation amplitude of each radiation unit; designing a Ka-band two-dimensional holographic beam scanning leaky-wave antenna square array based on liquid crystals, and the radiation pattern of the two-dimensional antenna array is regulated and controlled through the coding sequence to realize multi-beam scanning.

Provided are: a liquid crystalline resin composition having good flowability, which provides a molded body having good and excellent balance between low dust generation, low sliding wear, low warpage, and mechanical strength; and a camera module using the liquid crystalline resin composition. This liquid crystalline resin composition contains (A) a liquid crystalline resin, (B) a plate-like filler, and (C) an olefin polymer, the component (B) having a median diameter of 8-50 [mu] m, the component (C) containing an epoxy group-containing olefin polymer, the content of the component (A) being 54-87% by mass, the content of the component (B) being 10-40% by mass, and the content of the component (C) being 2.75-6.00% by mass with respect to the entire liquid crystalline resin composition, the content of the epoxy group is at least 0.003 mass% and less than 0.048 mass%.

The application discloses a method for detecting small molecules based on an aggregation-induced emission liquid crystal-polymer composite film, and applies the method to the detection of parathyroid hormone. The method introduces TPE-PPE molecules on the basis of traditional liquid crystal detection, prepares luminescent liquid crystals for the detection of substances, and compares the detection results of the fluorescence optical double channel. The optical image can only detect parathyroid hormone above 10 ug / mL, while the sensitivity of the fluorescence to the orientation of the liquid crystal molecules realizes the change of the aggregation state of the AIE, so that the fluorescence detection of the AIE liquid crystal (AIE-LCs) can realize the detection of 1 ng / mL. In addition, 5wt% of the prepolymer is introduced, and ultraviolet irradiation is performed for 8 s. Since the amorphous structure is formed on the surface of the protein, the detection signal is amplified, and the optical and fluorescence detection limits are simultaneously reduced to 0.01 ug / mL and 50 pg / mL respectively.

This invention discloses a semi-continuous uniform heat treatment control method and equipment for liquid crystal polyarylate fibers. After being unwound from a yarn rack, the liquid crystal polyarylate precursor fibers sequentially pass through a first drive roller group, a first heat treatment tunnel, a second drive roller group, a second heat treatment tunnel, a third drive roller group, a third heat treatment tunnel, and a fourth drive roller group, finally being wound up by a take-up machine. By controlling the fiber path length between heat treatment tunnels, the length of each heat treatment tunnel, the heat treatment temperature, the heat treatment tension, and the equipment operation program, the static residence and intermittent transmission of the fibers in each heat treatment tunnel are achieved. This invention achieves static residence heat treatment and transmission of liquid crystal polyarylate fibers using the above control method, ensuring uniformity of fiber heating and tension. It can handle a wide range of precursor fibers, with linear densities of 5–110 tex and breaking strengths of 6–12 cN / dtex. Furthermore, the operation is simple and easy to control, and it can simultaneously process multiple fiber bundles with high efficiency.

This invention discloses a liquid crystal filter-based lidar chopping device for atmospheric wind and temperature detection, comprising a digitally controlled voltage output module, a liquid crystal module, a light guide module, a timing control module, a polarization beam splitter module, a frequency discriminator module, a reference channel photodetector, a frequency discriminator channel photodetector, a photon counting and acquisition card, a computer, a pulsed laser, a telescope, and a collimation module. This invention also discloses a liquid crystal filter-based lidar chopping method for atmospheric wind and temperature detection. This invention solves the problem of atmospheric wind and temperature detection being limited by the dynamic range of the photodetector; the received signal attenuation amplitude can be adaptively adjusted in real time, better adapting to weather changes. Furthermore, although liquid crystal filtering introduces some signal loss, wind and temperature detection typically uses the ratio of the reference channel and frequency discriminator channel signals for inversion, so the final result is independent of the liquid crystal's transmittance, thus avoiding the negative impact of liquid crystal filtering.

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 phase of an ordered structure formed on a substrate surface via self-assembly of ILCs having cation head groups, alkyl tail groups having a plurality of hydrocarbons and anions. In the embodiments disclosed herein, the phase of the ordered structure is controlled by replacing the hydrogen (H) atoms of the hydrocarbons included the alkyl chain with larger sized functional groups. Adding larger sized functional groups to the alkyl chain changes the phase of the ordered structure by: (a) increasing the separation between the hydrophilic (cation) and hydrophobic (alkyl tail) groups of the ILCs, and (b) changing the orientation of alkyl tails within the tail groups of the self-assembled ILCs.

The present invention addresses the problem of providing a cured film-forming composition for forming a cured film for forming an alignment material which has excellent solvent resistance, can align polymerizable liquid crystals with high sensitivity, and has little liquid crystal rejection. [Solution] A composition for forming a cured film, an alignment material, and a phase difference material. The composition for forming a cured film contains (A) a compound having a photo-alignment group, (B) a polymer having a structural unit having an N-hydroxymethyl group or an N-alkoxymethyl group, and (C) a cyclodextrin derivative in which some or all of hydroxyl groups are modified.

The present application provides a liquid crystal compound, a liquid crystal composition, and an application and an element thereof. The liquid crystal compound has at least one property of stability to heat, a high clearing point, a low lower limit temperature of a liquid crystal phase, a small viscosity, a very large refractive index anisotropy, and excellent compatibility with other liquid crystal compounds, as a material used in an element for controlling electromagnetic waves in a range of 1 GHz to 10 THz. The liquid crystal composition contains the compound, and the element uses the composition, and electromagnetic wave control can be performed in a wide temperature range. A compound is represented by formula (1). For example, R 1 is an alkyl group having 1 to 12 carbon atoms; L 1 is fluorine; L 2 is hydrogen; L 3 is fluorine; L 4 is methyl; Y 1 is hydrogen; Y 2 is hydrogen; and n is 0.

The invention discloses a liquid crystal light deflector and a driving method of the liquid crystal light deflector. The liquid crystal light deflector comprises a liquid crystal light deflection panel and a controller. The liquid crystal light deflection panel includes a liquid crystal and an electrode that applies an electric field to the liquid crystal. The controller applies a predetermined electric field to the liquid crystals for driving the liquid crystals in a direction orthogonal to an initial alignment direction of the liquid crystals, thereby converting the liquid crystal light deflection panel to a first state causing deflection. The controller applies a uniform electric field to the liquid crystals for driving at least some of the liquid crystals in a direction orthogonal to the initial alignment direction, thereby transitioning the liquid crystal light deflection panel from the first state to a second state without causing deflection.

The invention discloses a display panel, a preparation method and a display device, and relates to the technical field of display. The display panel comprises a first substrate and a second substrate which are oppositely arranged; the liquid crystal layer is arranged between the first substrate and the second substrate, the liquid crystal layer comprises a plurality of sub-pixels arranged in an array mode, each sub-pixel comprises at least one cholesteric liquid crystal unit reflecting light of the corresponding color, and each cholesteric liquid crystal unit comprises a single-color cholesteric liquid crystal and a capsule wall wrapping the single-color cholesteric liquid crystal. In every two adjacent sub-pixels, under the condition that the cholesteric liquid crystal unit belonging to one sub-pixel is adjacent to the cholesteric liquid crystal unit belonging to the other sub-pixel, the two cholesteric liquid crystal units are in contact with each other. According to the display panel, self-isolation of the single-color cholesteric liquid crystals can be achieved through the capsule wall, the flowability of the single-color cholesteric liquid crystals reflecting different colors is effectively restrained, and then the problems of cross color and pressure points caused by flowing of the single-color cholesteric liquid crystals are fundamentally solved.

This application discloses a pixel and its configuration method, as well as a display panel, relating to the field of display technology. The pixel includes multiple strip-shaped transparent electrodes disposed within the pixel and multiple edge-sealing transparent electrodes disposed at the edge of the pixel. The pixel configuration method includes: for at least one edge-sealing transparent electrode, detecting whether the deflection angle of the liquid crystal near the edge-sealing transparent electrode in the strip-shaped transparent electrodes intersecting with the edge-sealing transparent electrode is within a preset penetration range; if the deflection angle is not within the preset penetration range, adjusting the edge-sealing transparent electrode to change the angle between the edge-sealing transparent electrode and the intersecting strip-shaped transparent electrodes, so that the deflection angle of the liquid crystal near the edge-sealing transparent electrode in the intersecting strip-shaped transparent electrodes approaches a preset optimal penetration angle; wherein the preset optimal penetration angle is within a preset penetration range. This application solves the technical problem of uneven display in display devices.

The present application aims to provide a liquid crystalline resin composition for a fan impeller, which is excellent in vibration damping characteristics and fluidity, can be favorably formed into a fan impeller in which noise is suppressed, a fan impeller formed from the aforementioned composition, and a fan provided with the aforementioned fan impeller. The present application is achieved by a liquid crystalline resin composition for a fan impeller, which comprises (A) a specific liquid crystalline resin and (B) a fibrous filler, the content of the aforementioned (B) fibrous filler being 5 to 40 mass% relative to the entire aforementioned liquid crystalline resin composition, and the loss coefficient at a temperature of 23°C and a frequency of 10,000 Hz measured in accordance with JIS G0602 being 0.05 or more.

This invention provides a liquid crystal alignment agent, a liquid crystal alignment film, and a liquid crystal display element that can suppress image retention caused by long-term AC driving and reduce the deviation of the torsion angle of liquid crystal within the liquid crystal alignment film surface. One liquid crystal alignment agent is characterized by comprising at least one polymer (A) selected from the group consisting of a polyimide precursor having a repeating unit (a1) shown in formula (1) and an imide derivative of the polyimide precursor. (R1 to R4 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 6 carbon atoms, an alkenyl group having 2 to 6 carbon atoms, an alkynyl group having 2 to 6 carbon atoms, a monovalent organic group having 1 to 6 carbon atoms containing a fluorine atom, or a phenyl group; at least one of R1 to R4 represents a group other than a hydrogen atom as defined above. R and Z each independently represent a hydrogen atom or a monovalent organic group. Y1 represents a divalent organic group as shown in the following formula (H).) (R a This indicates a monovalent organic group consisting of a hydroxyl group, a halogen atom, or 1 to 3 carbon atoms. a is 1 to 4. In the presence of multiple R... a In this case, they may be the same or different. * indicates a bond.

The present invention relates to a novel method for the preparation of photoaligning polymer materials comprising aryl acrylic acid ester groups, to photoalignment compositions obtained by this process, to the use of the composition as orienting layer for liquid crystals and to non-structured and structured optical elements, electro-optical elements, multi-layer systems or in nanoelectronics comprising the compositions.