427 results about "Liquid Crystalline Materials" patented technology

The invention provides a liquid crystal dopant with thermal-photoelectric triple response and an application of the liquid crystal dopant on intelligent glass. The molecular formula of the liquid crystal dopant is shown as a formula (1). The liquid crystal dopant is doped in a liquid crystal material, can respond to temperature, illumination and an electric field at the same time by combining the unique optical and electrical characteristics of the liquid crystal material, and adapts to various environment requirements; a plurality of optical states can be provided to meet energy-saving requirements in different scenes; the light modulation rate is high, the haze is large, and the privacy protection function is strong; the material is simple in preparation process, few in synthesis steps, good in stability and low in raw material cost, can be applied to the fields of residences, commercial buildings, automobiles, airplane windows and the like, and has a wide application prospect.

This disclosure provides systems, methods, and apparatuses for transparent displays that support two-way viewing angles. A transparent display may include one or more organic light-emitting diode (OLED) pixels configured for directional display in multiple directions. The pixel configuration may include an OLED, a set of switchable mirrors converging at an angle and configured to reflect an emission from the OLED, and a polymer dispersed liquid crystal (PDLC) material bisecting the angle between the set of switchable mirrors. The pixel configuration may display a first color in a first direction in accordance with the set of switchable mirrors being in a transparent state and the PDLC material being in an opaque state. The pixel configuration may additionally display a second color in a second direction in accordance with the set of switchable mirrors being in a mirrored state and the PDLC material being in a second transparent state.

The invention belongs to the technical field of display screens, and particularly relates to a liquid crystal display screen response speed optimization method based on temperature compensation, which can accurately measure and compensate phase change point offset of a liquid crystal material. Specifically, the accurate temperature control of the liquid crystal material in the extremely low temperature environment is realized through gradually refining the steps of measuring the current environment temperature, determining a basic compensation value, adjusting the output of a heating element, detecting a phase change point, calculating a temperature offset, updating a compensation strategy, executing independent temperature control on each pixel point and the like. Therefore, the response speed of the liquid crystal display screen is improved, the color accuracy is ensured, the equipment can stably operate under the condition of extremely low temperature, and a high-quality display effect is provided; through the dynamic compensation mechanism, the adaptability and the stability of the liquid crystal display screen under different temperature conditions are remarkably improved.

Eyeglasses may include left and right adjustable lenses. Each adjustable lens may include a stack of liquid crystal cells that are interconnected using vertical interconnect structures such as through-substrate-vias, conductive beads in a liquid crystal sealant, anisotropic conductive adhesive, conductive epoxy, diffusion bonds, eutectic bonds, and / or other suitable interconnect structures. Each liquid crystal cell in the stack may include liquid crystal material sandwiched between first and second substrates. A sealant may surround the liquid crystal material and may include conductive beads that form intra-cell connections between the first and second substrates of that liquid crystal cell. Through-substrate-vias may be formed in the substrate and may be coupled to the conductive beads in the sealant. Anisotropic adhesive, conductive epoxy, or other conductive material may be located between the liquid crystal cells and may be used to form inter-cell connections in the stack.

A light turning element 850 comprises a layer of liquid crystal (LC) material 852 which defines a plane. The layer of liquid crystal material could comprise LC molecules 855 and is configured such tha

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 invention relates to a head-up display, a use method thereof, electronic equipment and a vehicle comprising the same. The head-up display comprises a backlight system, a liquid crystal display screen, a temperature sensor and a controller, the clear temperature of a liquid crystal material used by the liquid crystal display screen ranges from 105 DEG C to 150 DEG C, and the temperature sensor is arranged on the liquid crystal display screen and used for detecting the temperature of the liquid crystal display screen; the backlight system, the liquid crystal display screen and the temperature sensor are all electrically connected with the controller. The clear temperature of the liquid crystal material in the liquid crystal display screen included in the head-up display is 105 DEG C or above, even if the display screen in the head-up display is overheated due to the fact that sunlight flows backwards, the local concentrated temperature cannot exceed the clear temperature of liquid crystal molecules, then the liquid crystal molecules can be prevented from being dissolved, the liquid crystal display screen can be prevented from losing efficacy, and therefore the user experience is improved. The head-up display provided by the invention can avoid the problem of local non-display caused by sunlight backflow.

The invention relates to polymerizable liquid crystal formulations (as a subcategory of liquid crystal material), especially to polymerizable ink formulations for inkjet printing, which are preferably PFAS-free (for enabling the reduction of perfluorocarbons and providing an environment friendly material), and which are comprising one or more polymerizable mesogenic compounds, also known as reactive mesogens (RMs), and one or more organic solvents selected from the group of aromatic ester and aromatic or aliphatic diester solvents, to polymers and polymer films obtained from such formulations, and to the use of the formulations, polymers and polymer films in optical or electrooptical components or devices, especially for digital optics or augmented reality or virtual reality (AR / VR) applications like polarizers, optical compensators, reflective films, diffraction or surface gratings, Bragg polarization gratings (Bragg PG), polarization volume gratings (PVG), polarization volume holograms (PVH), Pancharatnam Berry (PB) gratings, nonmechanical beam steering elements, optical waveguides, optical couplers, optical combiners, polarization beam splitters, partial mirrors, lenses or PB lenses.

According to the liquid crystal composition, all components (general formulas I-IV) contain F atoms, and the limitation that only part of components of a traditional liquid crystal material contain F atoms is broken through. The problems of high transparent haze and slow low-temperature response of a negative dielectric liquid crystal material are effectively solved. A traditional fluorinated compound is easy to separate from a polycyclic structure due to non-uniform F distribution, so that the optical uniformity is poor, and low-temperature viscosity drastic increase and high-temperature molecule out-of-order are difficult to improve at the same time. Through all-component F-containing design, the dielectric anisotropy is reduced, and the negative dielectric property is endowed; meanwhile, a special space structure and uniform distribution of F atoms synergistically enhance the stability of an intermolecular interaction network, maintain a low-viscosity characteristic in a wide temperature range, inhibit abnormal rise of low-temperature viscosity so as to accelerate response and reduce delay, inhibit out-of-order arrangement of high-temperature molecules, remarkably reduce the decreasing amplitude of fog-state light transmittance and improve the fog-state light transmittance. And collaborative optimization of optical uniformity, response speed and high-temperature stability is realized.

The invention discloses a preparation method of a PNLC film and application of the PNLC film in an automobile intelligent dimming awning, and belongs to the technical field of liquid crystal materials for intelligent awning glass and preparation of the liquid crystal materials. The problems that an existing automobile intelligent dimming awning cannot meet the rapid dimming requirement and is poor in reliability and durability and the like are solved. A bifunctional liquid crystal monomer RM82 and a nematic liquid crystal E7 are compounded, acrylate end group polymerization of the RM82 is realized under the initiation of ultraviolet light, meanwhile, a biphenyl core structure and E7 can form a strong pi-pi conjugation effect, a phase separation energy barrier of the PNLC film is remarkably reduced, GQDs serve as a scattering enhancer, the PNLC film is endowed with a dynamic luminescence capability by utilizing the fluorescence characteristic of the GQDs, and the PNLC film has a good application prospect. The orientation of liquid crystal molecules is regulated and controlled through an electric field or temperature, the light scattering state is changed, switching of light transmitting, light scattering and light emitting is achieved, and the starry sky effect is simulated.

The invention relates to the technical field of flexible sensors, and particularly discloses breathable ion skin which comprises water, a polymer, a liquid crystal and a conductive ion active substance. The material with unique soft elasticity is prepared by combining the orderly-oriented liquid crystal material and the polymer elastomer, the excellent adhesion stability can be kept under the cyclic load, and the stripping interface toughness is high. The composite fiber membrane of a liquid crystal elastomer core-ion skin shell structure is prepared through coaxial electrostatic spinning, the liquid crystal elastomer core provides good structural stability and adhesion stability, the ion skin shell provides good signal detection capacity, and meanwhile, the porous membrane structure prepared through electrostatic spinning has the ultrahigh water vapor permeability and can be used for preparing the composite fiber membrane of the liquid crystal elastomer core-ion skin shell structure. Sweat generated at the contact site of the ion skin and the human skin can be quickly volatilized, sweat accumulation is reduced, and the human skin does not have inflammatory response after the ion skin is worn for a long time.

The present invention discloses a liquid crystal composition with high transmittance and a liquid crystal display device thereof. The liquid crystal composition of the present invention comprises: at least one compound of general formula I, at least one compound of general formula II, and at least one compound of general formula III. The present invention also discloses a liquid crystal display device comprising the liquid crystal composition. While maintaining appropriate rotational viscosity, optical anisotropy, and clearing point, the liquid crystal composition of the present invention also has a large average elastic constant. The liquid crystal molecules of the liquid crystal composition exhibit good order, a large perpendicular dielectric to dielectric ratio, and high transmittance. As a result, the liquid crystal display device comprising the composition has a faster response speed, higher contrast and transmittance, a lower threshold voltage, and reduced energy consumption of the liquid crystal display device. The composition is a liquid crystal material with better overall performance and is particularly suitable for liquid crystal display devices in display modes such as IPS. #imgabs0#

The present invention relates to dichroic dye compounds of formula I, as defined in claim 1, which are based on the donor-acceptor structure wherein the donor moiety comprises a polycyclic heteroaromatic group consisting of at least four fused rings, to mesogenic media comprising one or more compounds of formula I, the present invention relates to novel compounds, mesogenic media and liquid crystal materials, and to the use of these compounds, mesogenic media and liquid crystal materials in optical, electronic and electro-optical applications, in particular in devices for regulating energy through external spaces into internal spaces, for example in switchable windows for solar control in smart buildings and vehicles, with energy conservation and improved comfort.

The invention relates to a novel liquid crystal material and application thereof, a double five-membered heteroaromatic ring is used as a core structure unit of a liquid crystal molecule, so that the liquid crystal material keeps high dielectric anisotropy, and meanwhile, the rotary viscosity of the liquid crystal molecule is remarkably reduced. A polar substituent group is introduced at the tail end of a molecule, so that the electro-optical performance is further optimized, particularly, the dimming contrast ratio and the response speed are obviously improved, and the compound also has excellent damp-heat stability and can meet the requirements of application scenes such as large-area intelligent dimming windows and vehicle-mounted anti-dazzle rearview mirrors. The liquid crystal material provided by the invention not only provides excellent electro-optical performance, but also has low-voltage driving, high dimming contrast and excellent environmental stability, provides an innovative material solution for a next-generation high-speed and low-power-consumption liquid crystal display device, and has wide application prospects and good industrialization potential.

A display driver drives a color sequential liquid crystal display. The display driver obtains pixel intensity data for a pixel of the display, including a first color sub frame (CSF) pixel intensity value and a second CSF pixel intensity value for a second CSF following the first CSF. Selection logic is applied to the pixel intensity data to select a start time for a modulation pulse: for a given second CSF pixel intensity value, in response to a first first CSF pixel intensity value, a first start time is selected from a plurality of predefined potential start times; and in response to a second first CSF pixel intensity value greater than the first first CSF pixel intensity value, a second start time later than the first start time is selected. The liquid crystal material of the pixel is driven with a modulation pulse starting at the selected start time.

This invention relates to the field of holographic polymer-dispersed liquid crystal materials technology, providing liquid crystal functionalized nanoparticles, their preparation method, and materials. The liquid crystal functionalized nanoparticles include a nanoparticle core, a surface-modified layer bonded to the nanoparticle core, and a liquid crystal functionalized layer bonded to the surface-modified layer. Advantages: Liquid crystal transformation is achieved by chemically bonding small-molecule liquid crystal building blocks to the nanoparticles. By limiting the types of liquid crystal building blocks, the compatibility between the nanoparticles and the HPDLC system is improved, effectively solving the aggregation problem of traditional nanoparticle-doped HPDLC. Furthermore, this invention utilizes the inductive effect of the liquid crystal building blocks bonded to the nanoparticles and the high diffusion coefficient of the small-molecule liquid crystal building blocks, combined with the chemical potential gradient driving the holographic photopolymerization process and the excellent compatibility between the nanoparticles and the liquid crystal, to achieve directional enrichment of nanoparticles into liquid crystal microregions, further improving phase separation regularity.

The invention discloses a dye liquid crystal composition and application thereof, and belongs to the technical field of liquid crystal materials. The dye liquid crystal composition is composed of a liquid crystal main body, a dichroic dye and a chiral agent, and the liquid crystal main body is composed of at least one compound represented by a general formula I, at least one compound represented by a general formula II and at least one compound represented by a general formula III: I, II and III. The dye liquid crystal composition has the beneficial effects that the dye liquid crystal composition is relatively high in response speed, relatively low in driving power consumption, relatively high in contrast ratio and good in photo-thermal stability.

The invention discloses an organic compound and application thereof. The organic compound has a structure as shown in a formula I. In the formula I, R1 and R2 represent C1-C15 straight-chain, branched-chain alkyl or alkoxy in a same or different manner at each occurrence, and R1 and R2 represent C1-C15 straight-chain, branched-chain alkyl or alkoxy at each occurrence. Wherein any one or more disconnected-CH2-can be replaced by cyclopropylidene, cyclobutyl, cyclopentadiene or cyclopentadiene,-CH = CH-,-N (Re)-,-O-,-S-,-CO-,-CO-O-and-O-CO-in a form that O-or S-is not connected with each other, and at least one-CH2-in R1 and R2 is replaced by cyclopropylidene, cyclobutyl, cyclopentadiene or cyclopentadiene. The organic compound structure has the characteristics of low melting point, good low-temperature solubility and small normal temperature-high temperature contrast change rate. The liquid crystal material can be uniformly mixed with mixed crystals and completely dissolved at a relatively low processing temperature, and the risk of thermal decomposition or phase change of the liquid crystal material can be reduced. # imgabs0 #

The invention discloses an ABX3 type perovskite material stabilized by a liquid crystal material and a preparation method of the ABX3 type perovskite material, and belongs to the field of semiconductor photoelectric materials and energy materials. The preparation method comprises the following steps: (1) uniformly mixing lead iodide and dodecyl dimethyl benzyl ammonium bromide, and carrying out heat treatment reaction to obtain a liquid crystal material solid; (2) dissolving the obtained liquid crystal material solid in an organic solvent to obtain a precursor solution; and (3) coating the surface of the ABX3 type perovskite thin film with the obtained precursor solution to obtain the ABX3 type perovskite material stabilized by the liquid crystal material. The ABX3 type perovskite which is high in quality and ultrahigh in stability is prepared through the method, the stability and the photoelectric property of the perovskite material are improved in order of magnitude, and the ABX3 type perovskite can be widely applied to the photoelectric fields of batteries, light emitting, detectors and the like; the preparation method has the characteristics of simplicity, easiness in control, convenience in operation, lower cost and the like, and is convenient for large-scale production in factories.

A reflecting device in an embodiment according to the present invention includes common electrodes arranged in a matrix at a distance in a first direction and a second direction intersecting the first direction, bias electrodes arranged overlapping the common electrodes in a planar view, a liquid crystal layer between the common electrodes and the bias electrodes, and common wirings connecting adjacent common electrodes among the common electrodes. Each of the common wirings has a length of half an effective wavelength λg when a radio wave of a specific wavelength λ propagates through the liquid crystal layer.

This invention discloses an optical lens device comprising: a liquid crystal material housed between two half-cell components; wherein one or more of the two half-cell components include a first concentric electrode pattern and a second concentric electrode pattern, the first concentric electrode pattern and the second concentric electrode pattern being electrically operable in parallel to at least switch the liquid crystal material to a first state and switch out of the first state; wherein the first state includes a cooperative refractive index distribution in adjacent first and second regions centered on an optical axis; wherein at least one of the two half-cell components includes at least one annular solid wall structure located in a reset region between a first edge of the first region and a second edge of the second region; and wherein the solid wall structure is positioned closer to the first region than to the second region; and when the liquid crystal material is in the first state, the refractive index of unpolarized light propagating in a direction perpendicular to the half-cell components is more closely matched with the liquid crystal material at the first edge of the first region than the liquid crystal material at the second edge of the second region.

The invention provides a micro display screen light field control structure and a preparation method thereof, and relates to the technical field of micro display. Comprising a substrate, a silicon-based OLED device, a thin film packaging layer and a liquid crystal control layer, wherein a pixel definition layer with a specific inverted trapezoidal structure is arranged on the substrate; the silicon-based OLED device is evaporated on the substrate; the thin film packaging layer covers the silicon-based OLED device and forms a water vapor isolation layer; the cover plate glass is carved into a strip-shaped conductive thin film and distributed with a strip-shaped cathode of the silicon-based OLED device in a crossed mode, the driving circuit is used for controlling the deflection state of liquid crystal molecules, and the silicon-based OLED device comprises a chiral OLED device film layer structure and is used for emitting circularly polarized light. According to the invention, the light field distribution can be stably regulated and controlled, the high-quality naked-eye 3D display effect is realized, and the stable operation of the silicon-based OLED device is effectively ensured.

The application relates to a fluorine-containing ferroelectric nematic liquid crystal molecule and application thereof, relates to the technical field of photoelectric materials, and solves the problem of low dielectric constant of traditional liquid crystal materials which restricts the application of the liquid crystal materials in photoelectric functional devices. The molecule adopts a unique non-chiral V-shaped configuration design, takes a benzene ring as a core skeleton, and realizes performance optimization through meta-connection of differentiated functional side chains. In the molecular structure design, a strong electron-withdrawing trifluoromethyl substituent is introduced into the benzene ring 2, 4 of one end of the side chain, the intermolecular interaction force is enhanced, and the long-range order of the material is maintained; the other end adopts an alkoxy flexible chain structure, which not only improves the solubility of the material, but also enhances the thermal stability. The raw material is easy to obtain, the preparation is simple, the fluorine-containing ferroelectric liquid crystal molecule is in a nematic phase, the dielectric constant can be as high as 1.4 x 10 4 (1 kHz), and has a wide ferroelectric nematic phase transition temperature, high polarization intensity and nonlinear optical response, and has important application value in the field of photoelectric functional materials.

The present application relates to ferroelectric nematic liquid crystal (FNLC) compounds characterized by chemical structures having electron donor–acceptor chromophores connected via linkers. The compounds have a general structure of A1–L1–A2–L2–(Ax–Ly)n–B, where A and B are aryl or heteroaryl groups, and L are linkers selected to promote spontaneous polar alignment in the nematic phase. The FNLCs enable enhanced second-order nonlinear optical properties and electro-optic coefficients (r33), with values exceeding, e.g., 30 pm / V in some embodiments. The FNLC compounds also exhibit absorption maxima above 400 nm, indicating extended π-conjugation and strong intramolecular charge transfer. The present application also includes compositions and mixtures of such compounds, which may form glassy ferroelectric nematic phases suitable for integration into nonlinear optical devices.

The invention discloses a liquid crystal composition and a liquid crystal display panel. The liquid crystal composition comprises a liquid crystal material, a polymerizable compound or a polymer containing a polymerized form of the polymerizable compound, and a self-alignment additive, the liquid crystal material comprises a first liquid crystal compound, a second liquid crystal compound, a third liquid crystal compound and a fourth liquid crystal compound; the first liquid crystal compound is selected from at least one of a formula I-1 and a formula I-2; the second liquid crystal compound is selected from at least one of compounds represented by a formula II; the third liquid crystal compound is selected from at least one of a formula III-1 and a formula III-2; the fourth liquid crystal compound is selected from at least one of a formula IV-1 and a formula IV-2; the chemical structural formula of the polymerizable compound is shown as a formula V; the chemical structural formula of the self-alignment additive is shown as a formula VI. The liquid crystal composition provided by the invention has the advantages of high response speed, high stability, high penetration rate and the like, and can realize vertical alignment of a liquid crystal material under the condition that a polyimide alignment layer is not needed.

The utility model discloses a visual PVC baggage tag for baggage identification relates to baggage tag related field, including PVC baggage tag, visualization mechanism and protective layer, the front of PVC baggage tag right lower end adheres and is connected with the visualization mechanism, the left end adheres and is connected with the protective layer, the visualization mechanism is provided, the visual mechanism is connected with the protective layer, the visual mechanism is connected with the protective layer, the visual mechanism is connected with the protective layer, the visual mechanism is connected with the protective layer, and the protective layer is connected with the protective layer. Visual management of luggage is achieved through the RFID chip, then abrasion resistance and corrosion resistance of the RFID chip are enhanced through the multiple protective layers, the probability that the RFID chip is imitated and replaced is reduced, meanwhile, the two-dimensional code serves as an auxiliary means for visualization of the RFID chip, and management efficiency is further improved; the protective layer is arranged, the ultraviolet resistance, the flexibility, the tear resistance and the flame retardance of the PVC luggage tag are improved through the multiple material layers, visual display of the temperature is achieved through the liquid crystal material layer, and articles in a luggage case are prevented from going bad and being damaged due to too high or too low temperature.

The invention discloses a magnetic element modified potassium niobate-based spiral electric polarization ceramic and a preparation method thereof. The chemical composition is (1-x) KNbO3-xFe2O3, wherein x is more than or equal to 0.0005 and less than or equal to 0.002. The preparation method comprises the following steps: weighing K2CO3, Nb2O5 and Fe according to a stoichiometric ratio, grinding, pre-sintering and ball-milling to obtain raw material powder, pressing the powder into sheets by using a mold, and sintering at 1030-1040 DEG C for 2 hours to obtain the iron element modified potassium niobate-based ceramic. The preparation method disclosed by the invention is simple in preparation steps, green, friendly and high in repeatability, has a spiral electric polarization characteristic similar to that of a liquid crystal material, and has the comprehensive performance ranges of high energy storage efficiency of 96.60-97.87% and breakdown field strength of 110-440kV / cm under different proportions. The lead-free functional inorganic material has great commercial application value.

A ferroelectric liquid crystal (FLC) material for the deformed helix FLC (DHFLC) electro-optical mode devices and shows optimum electro-optical properties including high tilt angle (>38°), and short helix pitch (<120 nm), and spontaneous polarization (>100 nC / cm2) comprising at least two components, wherein at least one FLC component is a chiral compound of Formula (I):particularly:wherein W1 and W2 are chiral groups with polar substituent at chiral centre, A and B are independently N atom or CH groups providing that at least one of A or B is N atom. Other various groups are as defined herein.

Liquid-crystal composition comprising (A) dye compounds and(B) a liquid crystal material, wherein the dye compounds (A) include an anthraquinone compound represented by general formula (1) and an anthraquinone compound represented by general formula (2) in a specific proportion and further include a dye compound which is neither the anthraquinone compound represented by general formula (1) nor the anthraquinone compound represented by general formula (2), The liquid-crystal composition also may include the (A) and (B) components and further containing (C) a photocurable compound and (D) a photopolymerization initiator A cured object obtained from the liquid-crystal composition, and a light-modulating element in which the liquid-crystal composition or the cured object is sandwiched therein are also set forth.

A liquid crystal display device includes a first substrate, a liquid crystal layer, a second substrate, a retardation layer, and a polarizer in this order from a back face side, and includes a plurality of pixels arrayed in a matrix shape, in which the first substrate includes a reflective layer that reflects light, a first electrode and a second electrode that are capable of generating a transverse electrical field in the liquid crystal layer, and a first horizontal alignment film that is in contact with the liquid crystal layer, the second substrate includes a second horizontal alignment film in contact with the liquid crystal layer, the retardation layer includes a λ / 4 plate and a λ / 2 plate, the liquid crystal layer includes a positive-type liquid crystal material or a negative-type liquid crystal material, and has a twist alignment when no voltage is applied, and an angle formed by a polarization axis of the polarizer and an alignment direction of liquid crystal molecules defined by the first horizontal alignment film is within a predetermined range.