820 results about "Liquid crystalline" patented technology

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 new media exhibit a ferroelectric nematic phase preferably at ambient temperature. They preferably comprise one or more compounds selected from the group of compounds of formulae IA, IB and IC,in which the variable groups have the meanings indicated in the text and in the claims. Use of the media for providing ferroelectric nematic materials and a method of operation of an electro-optical device are presented. The media may be useful for energy-saving displays and electrical appliances.

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 optical system includes a variable polarization electro-switchable device forming a variable polarizer, the variable polarizer including first and second transparent electrodes with an electric field between the first and second electrodes, the first and second electrodes are coplanar, forming an alternation of first and second electrically conductive strips—at distinct potentials, and an electroactive layer made of a material including liquid crystals which are nematic and dichroic dyes.

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.

The invention relates to a polarization spectrometer, in particular to a pitch-adjustable polarization spectrometer based on cholesteric cellulose chiral liquid crystal. The polarization spectrometer is prepared by adopting the following method: step 1, regulating and controlling the screw pitch of cholesteric cellulose chiral liquid crystal; step 2, preparing a flexible PDMS film; step 3, preparing a patterned PDMS through hole film; 4, treating the surface of the glass sheet; step 5, filling cholesteric cellulose chiral liquid crystals; and step 6, orienting the cholesteric cellulose chiral liquid crystal to obtain the pitch-adjustable polarization spectrometer with the film-shaped patterned cholesteric cellulose chiral liquid crystal. The problems that a traditional small-molecule liquid crystal chiral agent is difficult to regulate and control the screw pitch of the cholesteric phase cellulose chiral liquid crystal and easy to agglomerate can be solved, and simple preparation of the screw pitch-adjustable cholesteric phase cellulose chiral liquid crystal is achieved; and meanwhile, transmission of right-handed circularly polarized light and selective reflection of left-handed circularly polarized light are realized by utilizing the patterned cholesteric cellulose chiral liquid crystal.

New compounds and their mixtures enable the formation of the ferroelectric nematic liquid crystalline phase at ambient temperature. Compounds of the formula I are presented,in which the variable groups have the meanings indicated in claim 1. Liquid crystal media comprise at least one compound of the formula I.

The invention discloses a circularly polarized dielectric resonator two-dimensional beam scanning phased-array antenna based on liquid crystal, and belongs to the technical field of microwave antennas. The antenna comprises an elliptic cylindrical dielectric resonator radiation structure, a sequential rotation feed network and a liquid crystal phase shifter structure based on a glass plate, wherein the elliptic cylindrical dielectric resonator radiation structure and the sequential rotation feed network are arranged on a flexible printed circuit board (FPC); the radiation structure and the feed network which are arranged on the FPC comprise a radiation unit, an FPC layer and a feed network; the liquid crystal phase shifter comprises a glass dielectric substrate, a liquid crystal layer, an inverted spiral microstrip line and a bias network; the elliptic cylindrical dielectric resonator radiation structure realizes wide impedance bandwidth and wide axial ratio bandwidth; the antenna array also uses a sequential rotation method, the axial ratio characteristic of the phased-array antenna is further improved, and the coupling feed structure is simplified by using the design that the L-shaped microstrip line is connected with the inverted spiral microstrip line after sequential rotation.

A liquid crystal elastomer (LCE) formed from liquid crystalline monomers having 4-(6-(acryloyloxy)n-oxy)phenyl-4-(6-(acryloyloxy)m-oxy)benzoate (CnBAPE) as the mesogenic core. The LCEs have improved thermotropic characteristics, including lower thermotropic activation temperatures. The LCEs may also incorporate azobenzene to thereby also enhance the phototropic properties of the LCE.

The invention relates to the technical field of reconfigurable communication antenna equipment, and particularly discloses a liquid crystal-based high-aperture efficiency low-profile reconfigurable folding transmission array antenna design. The invention aims to solve the problems of insufficient aperture efficiency and high profile height in the existing reconfigurable folding array. The invention designs a novel transmission unit, and the unit integrates upper and lower layers of radiation and receiving patches with a polarization selection function, and a strip line-based liquid crystal phase shifter for realizing phase compensation. In order to minimize the profile height, the main transmission array is composed of a novel transmission unit, the auxiliary reflection array adopts a polarization conversion unit, and the interaction between the main transmission array and the auxiliary reflection array is used for folding the transmission path of electromagnetic waves. Meanwhile, the microstrip patch antenna replaces a traditional horn antenna to serve as an array feed source, so that the overall profile is reduced. In order to improve the aperture efficiency, the liquid crystal phase shifter is elaborately optimized to meet the requirement of 2-bit phase quantization, so that the phase modulation precision and the accuracy of array plane phase distribution are improved. Compared with a traditional space feed antenna and a folding array, the overall outline of the design is reduced by 2 / 3, meanwhile, the aperture efficiency is remarkably improved, and excellent two-dimensional beam scanning performance is kept.

A light emitting device is described. The light emitting device includes a single light emitting photonic crystal having an electroluminescent material disposed in the single light emitting photonic crystal. The single light emitting photonic crystal includes a series of layers of chiral liquid crystalline polymer. The electroluminescent material is localized in one of the layers of chiral liquid crystalline polymer. At least one of the series of layers of chiral liquid crystalline polymer includes a chiral liquid crystalline, charge carrier transporting polymer. The single light emitting photonic crystal further includes a second luminescent material, where energy emanating from the electroluminescent material stimulates the second luminescent material into light emission, and the light emitted by the light emitting device is a mixture of light emitted by the electroluminescent material and light emitted by the second luminescent material.

The invention discloses a method and a device for determining liquid crystal phase compensation of silicon-based liquid crystal. The method comprises the following steps: respectively representing a first polarization state and a second polarization state according to a first Mueller matrix of the silicon-based liquid crystal in a modulation state, a second Mueller matrix of the silicon-based liquid crystal in a non-modulation state and a Mueller matrix of the liquid crystal phase compensation unit; establishing a first contrast evaluation function according to the first polarization component in the first polarization state and the second polarization component in the second polarization state; converting independent variables in the first contrast evaluation function from the azimuth angle and the ellipsometry into the optical axis azimuth angle and the phase delay degree according to the characterization relation to obtain a second contrast evaluation function; and obtaining a target optical axis azimuth angle and a target phase delay degree according to the second contrast evaluation function, so that liquid crystal phase compensation parameters are quickly determined, and the contrast of an LCOS light machine in a bright field and a dark field is improved.

The invention provides a display panel and a display device, relates to the technical field of display, and aims to improve the light emitting gain of a near-to-eye display device.The display panel comprises a plurality of sub-pixels, each sub-pixel comprises a liquid crystal, a color film layer and a driving structure layer, and the color film layer and the driving structure layer are located on the two opposite sides of the liquid crystal respectively; wherein the sub-pixel further comprises an optical structure, the optical structure is located on a light emitting path from a backlight source of the display panel to a light emitting surface of the display panel, the optical structure comprises at least one lens, and the lens is at least used for converging light emitted by the backlight source; the orthographic projection of the lens on the plane of the display panel is overlapped with the opening area of the sub-pixel; the shading structure comprises a part located on the driving structure layer and a part located on the color film layer, and the orthographic projection of the shading structure on the plane of the display panel is overlapped with the edge of the opening area.

A light-adjusting glass is provided to include: a first toughened glass layer, a first adhesive layer, a first substrate, a second substrate, a second adhesive layer, a second toughened glass layer and supporting spacers between the first and second substrates, which are sequentially stacked; materials of the first and second adhesive layers are melted under the conditions that a temperature is in a range of 130° C. to 150° C. and a pressure is in a range of 12 bar to 14 bar, and are solidified after being cooled; the light-adjusting glass further includes an edge sealing structure around the first and second substrates, and the edge sealing structure, the first and second substrates are enclosed to form a gap filled with a liquid crystal; the edge sealing structure includes a liquid crystal pouring port therein; a sealing glue is at an opening of the liquid crystal pouring port and seals the opening.

The invention discloses a transmission type liquid crystal terahertz spatial light modulator with a large switch ratio. The transmission type liquid crystal terahertz spatial light modulator structurally comprises an upper-layer quartz substrate, an upper-layer metal structure, a liquid crystal layer, a lower-layer metal structure and a lower-layer quartz substrate in sequence from top to bottom, the upper-layer metal structure is adhered to the back surface of the upper-layer quartz substrate and is a four-opening square ring reverse structure array, and the lower-layer metal structure is adhered to the top surface of the lower-layer quartz substrate; and the liquid crystal layer is filled between the upper-layer metal structure and the lower-layer metal structure to form a metal-medium-metal structure. The electro-optical effect of the liquid crystal is utilized, the FPGA is communicated with the electrodes corresponding to the metal structures, voltage is applied between the upper-layer metal structure and the lower-layer metal structure, the effective dielectric constant of the liquid crystal can be changed by adjusting the voltage, and therefore on-off of terahertz waves is achieved. And the upper computer controls the FPGA to output voltage through an instruction so as to realize programmable regulation and control of the device.

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.

Disclosed herein is a frame buffer pixel circuit having a first data pass gate transistor G1, first storage capacitor C1, a voltage boosting line Vb, source follower transistor F, pull-down transistor P, and second data pass gate transistor G2. The pull-down transistor P is connected to the drain of transistor F and source of transistor G2 and the storage capacitor C1 is connected to a voltage boosting line Vb. In the operation, Vb is set to zero volt when data is transferring to C1 capacitor through G1 gate. After the frame data are loaded onto C1 capacitors in all pixels, Vb is set to designed voltage and G2 gates in all pixels are opened to charge Clcd capacitors. Vb is then set to zero volt again before starting to load next frame data onto pixels. Such process is iterated in the liquid crystal on silicon (LCOS) working time.

Lipid-based nanoparticles containing lipids, phenolic compounds, and, optionally, metal ions are provided. In certain forms, the nanoparticles adopt non-lamellar, lyotropic, liquid crystalline structures. Bioactive lipid-based nanoparticles containing one or more active agents are also provided as are methods of treating diseases or conditions with said bioactive lipid-based nanoparticles and formulations thereof.

The present disclosure relates to a liquid crystal device. The device comprises a first portion and a second portion, each portion comprising a respective substrate, and a liquid crystal layer arranged in between the first portion and the second portion, wherein said liquid crystal layer comprises a mixture of a non-polar nematic liquid crystal and at least one ferroelectric nematic liquid crystal dopant, wherein the ferroelectric nematic liquid crystal dopant is provided as phase-separated nano-sized domains surrounded by the non-polar nematic liquid crystal molecules, said liquid crystal layer having a polar nematic phase characterized by ferroelectric polarization, and flexoelectric polarization, wherein the sum of said ferroelectric polarization and flexoelectric polarization has a magnitude larger than the magnitude of said ferroelectric polarization and said flexoelectric polarization taken separately, and wherein at least one of the respective substrates, on an inner surface thereof facing the liquid crystal layer, is provided with an electrode pattern for generating an electric field within the liquid crystal layer, wherein the electric field is configured to couple with the flexoelectric polarization and the ferroelectric polarization of the liquid crystal layer to perform switching of said liquid crystal layer.

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 invention discloses a head-up display device, an electronic device and a vehicle, the head-up display device comprises a display module, the display module comprises a liquid crystal lens array, the liquid crystal lens array comprises a lens, a liquid crystal, a first electrode and a second electrode, the liquid crystal and the lens are arranged between the first electrode and the second electrode, and the liquid crystal is arranged between the first electrode and the second electrode. Under the condition that the first electrode and the second electrode are not electrified, the refractive indexes of the lens and the liquid crystal are the same, and under the condition that the first electrode and the second electrode are electrified, the refractive indexes of the lens and the liquid crystal are different. The refractive index of the liquid crystal is flexibly adjusted by changing the power-on and power-off of the first electrode and the second electrode, so that the optical characteristics of the display module are controlled, and 2D-HUD and 3D-HUD display can be achieved on one display module at the same time.

A camera module containing a molded part (e.g., generally planar base, lens barrel mounted on the base, etc.) that is formed form a polymer composition is provided. The polymer composition includes a liquid crystalline polymer and inorganic particles that have a hardness value of about 2.5 or more based on the Mohs hardness scale.

The invention provides a display panel. The display panel comprises a first substrate, a second substrate and a liquid crystal layer, wherein the first substrate and the second substrate are oppositely arranged, and the liquid crystal layer is arranged between the first substrate and the second substrate. The first substrate comprises a plurality of data lines and a plurality of scanning lines which are arranged at intervals, the data lines and the scanning lines are arranged in a crossed mode to define a plurality of pixel opening areas, the first electrode layer comprises first electrode patterns arranged in the pixel opening areas in a patterned mode, and the second electrode layer comprises a plurality of first electrode wires arranged corresponding to the first electrode patterns. The extension directions of the multiple first electrode wires corresponding to the same first electrode pattern are the same, the liquid crystal layer is arranged on the sides, close to the second substrate, of the first electrode layer and the second electrode layer, the liquid crystal layer comprises multiple chiral liquid crystal molecules arranged in a spiral structure, the twisting force of the liquid crystal molecules is increased, the twisting elastic constant can be improved, and the stability of the liquid crystal display panel is improved. Therefore, the response speed of the liquid crystal is improved.

According to one embodiment, a display device includes a display panel having a liquid crystal layer containing a polymer dispersion liquid crystal, and a light guide element. The light guide element includes a base, a transparent layer having a refractive index lower than a refractive index of the base. A plurality of light emitting elements are arranged adjacent to a first side surface of the base, the first thickness of the transparent layer decreases from the first side surface towards a second side surface on an opposite side to the first side, and the second thickness of the transparent adhesive layer increasing from the first side surface towards the second side surface.

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.

The invention provides a composition for promoting formation of a cosmetic liquid crystal structure and a preparation method and application thereof, and belongs to the technical field of cosmetic preparations. According to the invention, squalane, hydrogenated lecithin with a specific model, cholesterol, glycerol and water are used as raw materials, and a composition, namely squalane liposome, for promoting formation of a liquid crystal structure of cosmetics is prepared by a high-pressure homogenization method. According to the squalane liposome and the preparation method thereof, the proportion of the components is investigated, and the squalane liposome which is good in stability and can keep stable for a long time under different extreme conditions is prepared; the whole process does not introduce organic reagents, is environment-friendly and safe, is simple to operate, and can realize large-scale production. The prepared squalane lipidosome can change the oil solubility of squalane, is suitable for various cosmetic systems, and improves the skin feeling experience and the moisturizing performance; in addition, the composition can promote the formation of liquid crystals in cosmetics and increase the number of liquid crystal states, so that the liquid crystal state structures in skin care products can stably exist for a long time, and the liquid crystal promotion effect presents dosage dependence.

A battery module that comprises an electrochemical cell is provided. The battery module includes a polymer composition that comprises a polymer matrix that includes a thermotropic liquid crystalline polymer and a thermally conductive filler distributed within the polymer matrix. The polymer composition exhibits an in-plane thermal conductivity of about 3 W / m-K or more as determined in accordance with ASTM E1461-13 (2022) and a deflection temperature under load of about 230° C.) or more as determined in accordance with ISO 75:2013 at a load of 1.8 MPa.

The invention discloses a liquid crystal-based Ka-band broadband circularly polarized phased-array antenna, and belongs to the technical field of microwave antennas. The antenna comprises a radiation structure and a feed structure. The radiation structure comprises a radiation unit, a liquid crystal layer, a grounding plate, a control circuit, a bias network and a radio frequency direct current isolation structure. The control circuit is realized by an FPGA (Field Programmable Gate Array) and is connected with the radiation unit through a bias network; the radio frequency direct current isolation structure is used for isolating direct current and radio frequency signals; the feed structure adopts a waveguide feed mode and forms a wave beam in a specified direction through phase compensation of the array units; the bandwidth of the antenna array is increased by using a sequential rotation feed mode, the offset line arrangement of the array is designed, and the radio frequency direct current isolation design is added, so that the technical problem that the circularly polarized bandwidth of the liquid crystal phased-array antenna is relatively narrow is solved.