63 results about "Liquid crystalline" patented technology

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 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.

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 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.

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 application provides a driving method for a silicon-based liquid crystal, a silicon-based liquid crystal, and a wavelength selective switch, relating to the field of optical switching engine technology. This driving method for the silicon-based liquid crystal can reduce the risk of instantaneous excessive power while shortening the switching time. The driving method includes: dividing the area of ​​the silicon-based liquid crystal that receives a single-wavelength optical signal into M sub-regions, where M is a positive integer greater than or equal to 2, and each sub-region includes at least one row of pixels; sequentially refreshing the M sub-regions to form a first grating pattern, wherein at least two sub-regions have different overshoot power outputs of optical signals based on the first grating pattern; sequentially refreshing the M sub-regions to form a second grating pattern, the second grating pattern being determined by the output angle of the single-wavelength optical signal and the steady-state power of the single-wavelength optical signal; the difference between the overshoot power and the steady-state power of the single-wavelength optical signal output from the area covered by the light spot is less than a preset value.

This invention discloses a method and system for detecting liquid crystal displays (LCDs) in electricity meters based on image recognition, belonging to the field of electricity meter testing technology. This invention combines deep learning, traditional methods, and LCD specifications to detect the LCD in electricity meters while ensuring recognition accuracy. It accurately identifies deep and edge features of the LCD, replacing manual inspection of LCDs during R&D and production processes. This reduces the iteration cycle of programs in R&D, improves efficiency in the production process, reduces human intervention in each step, enhances the intelligence of production, eliminates anomalies caused by human error, and improves detection accuracy. Furthermore, it saves images and detection data from the entire detection process, facilitating subsequent traceability and querying.

This invention provides a resin composition and a liquid crystal alignment agent with high reworkability of resin films and liquid crystal alignment films. Furthermore, it provides a liquid crystal alignment agent that yields a liquid crystal alignment film with high stability in liquid crystal alignment and without producing alignment inhomogeneity of the liquid crystal, the liquid crystal alignment film, and a liquid crystal display element using the liquid crystal alignment film. A polymer is also provided, which is at least one selected from polyimide precursors and polyimides having the structure of the following formula [1]. (R) 1 Indicates a thermally detachable group. R 2 * Represents a hydrogen atom or a monovalent organic group. * Represents a bonded bond.

The present invention provides a liquid crystal polymer composition which maintains mechanical strength and heat resistance possessed by a liquid crystal polymer, and which is excellent in thin-wall flowability and blister resistance. The present invention relates to a liquid crystal polymer composition which contains 0.1 to 150 parts by mass of talc having a quartz content of 0 to 0.25% by mass, relative to 100 parts by mass of a liquid crystal polymer.

This invention provides a multi-channel receiving SLM partition-controlled adaptive optics alignment system and method. The method includes: a beam to be aligned in a perturbed channel is decomposed into a target beam and a reference beam after passing through a beam splitter; a wavefront sensor receives the reference beam, acquires the intensity distribution and phase distribution of the reference beam, and inputs them into a processor; the processor uses a preset SLM multi-zone control algorithm to partition the liquid crystal of the phase-type SLM, and matches each selected zone with each optical receiver one by one, generating a phase hologram for each selected zone and inputting it into the liquid crystal controller; each selected zone of the SLM liquid crystal performs partition alignment and outputs the received target beam; this invention can achieve multi-point focusing, dynamic alignment, and power allocation of the received beam through a single SLM, supports multi-point simultaneous alignment and arbitrary power allocation of a multi-channel receiving UOWC system under dynamic conditions, and has outstanding advantages such as high flexibility, good real-time performance, and strong scalability.

The application relates to a high-isolation liquid-crystal-based power-division phase shifter, belonging to the technical field of communication, which comprises a power-division phase-shifting layer, a liquid crystal layer and a bias control layer, an upper ground is arranged above the power-division phase-shifting layer, the liquid crystal layer is arranged below the power-division phase-shifting layer, and a lower ground is arranged between the liquid crystal layer and the bias control layer; the two ends of the power-division phase-shifting layer are respectively connected with an input end and an output end, the bias control layer is connected with a PFGA control, the forward voltage of the bias control layer is fed to the liquid crystal in the liquid crystal layer by being applied to the lower ground, the voltage size of the bias control layer is controlled by the FPGA, then the effective dielectric constant of the bias control liquid crystal is controlled, the capacitance value is changed, then the phase shift constant of the electromagnetic wave is changed, and the phase shift purpose is achieved. The application applies the bias voltage below the microstrip transmission line, not only reduces the wave beam leakage problem caused by the coupling and the direct-current blocking capacitor, but also omits the choke and the direct-current blocking capacitor design, and realizes the miniaturization of the overall structure.

This invention belongs to the field of liquid crystal photonic device fabrication technology, and discloses a method for fabricating liquid crystal geometric phase devices based on PDMS thin film substrates. It aims to overcome the shortcomings of traditional rigid substrate liquid crystal geometric phase devices, such as large weight, non-stretchability, functional fixation, and difficulty in large-scale fabrication. The technology first prepares a PDMS thin film using a template method and performs elastic screening. Qualified films are then attached to a glass substrate. Next, alignment layer preparation, DMD exposure to fix the liquid crystal molecule orientation, and spin-coating and exposure curing of the liquid crystal layer are sequentially completed. Finally, the PDMS thin film is peeled off to obtain a complete device, which is then characterized using a polarizing microscope. This invention adopts an innovative strategy of "preparing the PDMS thin film first and then compositing the liquid crystal," maximizing device integrity. The fabricated device has advantages such as lightweight, flexible stretchability, and good liquid crystal molecule alignment, enabling dynamic zoom and efficient light field control. It is suitable for wearable photonic devices, flexible optical communication, and other scenarios, providing an efficient and controllable fabrication route, and promoting the practical application and multifunctionality of flexible liquid crystal optical devices.

This document describes the crystalline and liquid crystalline forms of sodium 25HC3S. This disclosure includes sodium 25HC3S in forms I, II, III, V, IX, XI, and XIII, and combinations thereof. Pharmaceutical formulations of the said forms or combinations thereof are further disclosed herein, as well as methods for treating or preventing diseases such as hypercholesterolemia, hypertriglyceridemia, and conditions associated with fat accumulation and inflammation (e.g., non-alcoholic fatty liver disease (NAFLD), non-alcoholic steatohepatitis (NASH), alcoholic hepatitis, acute kidney injury (AKI), psoriasis, and atherosclerosis). Methods for preparing 25HC3S are also provided.

A bobbin comprising a body portion around which a coil is capable of being wound is disclosed. The body portion comprises a polymer composition containing a polymer matrix that includes a thermotropic liquid crystalline polymer. The polymer composition exhibits a melt viscosity of about 300 Pa-s or less and a deflection temperature under load of about 170° C. or more.

This invention relates to compounds of formula (I), and preferably to liquid crystal media having a nematic phase and negative dielectric anisotropy, comprising a) one or more compounds of formula (I) and b) one or more compounds selected from formulas (II) and (III), wherein the parameters have the meaning given in claim 1, their use in electro-optic displays, particularly in active matrix displays based on VA, ECB, PALC, FFS or IPS effects, displays of this type comprising liquid crystal media, and the use of compounds of formula (I) in stabilizing liquid crystal media comprising one or more compounds of formula (II) and one or more compounds selected from formulas (III-1) to (III-4) and B.

An imaging device includes: a mount portion on which an interchangeable lens is mounted; a liquid crystal dimming element that performs dimming of incident light incident through a lens system in an interchangeable lens when the interchangeable lens is mounted on the mount portion; an imaging element that photoelectrically converts the incident light through the liquid crystal dimming element to generate a captured image signal; a signal processing unit that performs signal processing on the captured image signal output from the imaging element; and a control unit that causes the signal processing unit to execute shading correction processing of correcting shading caused by the liquid crystal dimming element with a correction coefficient set on the basis of a characteristic of an inclination of a liquid crystal of the liquid crystal dimming element.

This invention discloses a circularly polarized luminescent material, its preparation method, and its applications. The circularly polarized luminescent material comprises a polymer matrix, quantum dots, and a hand-shaped liquid crystal; the quantum dots are uniformly physically distributed within the hand-shaped liquid crystal, forming a quantum dot-liquid crystal composite structure, which is uniformly solidified within the polymer matrix. Alternatively, the circularly polarized luminescent material has a layered structure, including a liquid crystal layer and a polymer matrix layer encapsulating quantum dots; or, the circularly polarized luminescent material has a layered structure, including a quantum dot layer and a polymer matrix layer containing liquid crystal. The three structures of the circularly polarized luminescent materials provided by this invention all possess both high luminous quantum efficiency and a large luminous asymmetry factor, with a luminous quantum efficiency greater than 60% and an absolute value of the luminous asymmetry factor greater than 1, and can be widely used in three-dimensional display, information encryption, and anti-counterfeiting fields.

The application discloses a display system and a display method. The display system comprises a liquid crystal modulation assembly and an image processor. The liquid crystal modulation assembly is used for modulating first light source light based on a digital modulation signal to obtain image light. The frame period of each frame of digital modulation signal comprises a plurality of pixel frame periods. The pixel frame period comprises a plurality of PWM periods. Each frame of digital modulation signal comprises a plurality of pixel frame modulation signals corresponding to the pixel frame periods. Each pixel frame modulation signal comprises a plurality of PWM signals, and each PWM signal corresponds to a PWM period. The image processor is used for determining the waveform of the pixel frame modulation signal of the current pixel frame period based on the image data of the previous pixel frame period and the image data of the current pixel frame period in the two continuous pixel frame periods. In the above manner, the application can shorten the switching time of the liquid crystal, improve the display quality, and avoid the problems of liquid crystal durability and system complexity caused by voltage overdrive.

This invention relates to an optical structure comprising a linearly polarizing layer (6) and a twisted liquid crystal retarder layer (4) disposed at a polarizer interface (8). A first orientation direction of the liquid crystal within the twisted liquid crystal retarder layer (4) immediately adjacent to the polarizer interface (8) is set by the polarization direction of the polarizing layer (6). Furthermore, the optical structure includes an alignment layer (3) defining an alignment direction and an alignment interface (7) between the alignment layer (3) and the polarizing layer (6) or the twisted liquid crystal retarder layer (4). Furthermore, this invention relates to an anti-reflective device comprising such an optical structure and a method for manufacturing such an optical structure.

Embodiments of improved process flows and methods are provided to use directed self-assembly (DSA) of metallate ion liquid crystals (ILC) with metallate anions to pattern a semiconductor substrate. After the metallate ILC is self-assembled into an ordered structure, an oxidation process is used to remove organic components of the ordered structure and convert the metallate anions into a metal oxide pattern. In addition to providing a robust metal oxide pattern that can be transferred to an underlying substrate, the process flows and methods disclosed herein enable ILC to be used as a pitch multiplication means in advanced patterning techniques.

According to one embodiment, a display device includes a transparent substrate having a first main surface and a second main surface, a display element, a first optical element facing the display element, and a second optical element spaced apart from the first optical element. Each of the first optical element and the second optical element includes a first liquid crystal layer containing a first cholesteric liquid crystal and a second liquid crystal layer containing a second cholesteric liquid crystal. The second liquid crystal layer overlaps the first liquid crystal layer in the first optical element. In the second optical element, the first liquid crystal layer and the second liquid crystal layer are arranged on the second main surface.

The application provides a low driving voltage fast response intelligent dimming film, and belongs to the technical field of liquid crystal dimming films.The ferroelectric nematic liquid crystal DIO, liquid crystal monomer RM257, non-liquid crystal monomer EHA and photoinitiator IRG 651 are uniformly mixed in a certain proportion, then are poured into a liquid crystal cell with an indium tin oxide electrode at a certain temperature, wires are connected to the electrode and an alternating electric field with a certain intensity is applied, at the same time, ultraviolet irradiation is adopted to polymerize to complete curing, and thus an intelligent film based on polymer-restrained ferroelectric nematic liquid crystal with super-low driving voltage and fast response speed is obtained.The intelligent film has simple preparation, high yield, low driving voltage and stable performance, and can greatly reduce the energy consumption of building materials and improve the use safety.

The present invention relates to enzymatic methods for producing a stable lipid-based liquid crystalline phase of Fd3m or Hll space group, compositions comprising such phases, and uses thereof, wherein the starting mixture comprises 30-65 wt% polar lipids and 35-70 wt % oil which are well dispersed and triacylglycerol lipase is added to produce oil hydrolysate which in presence of aqueous solvent results in liquid crystal formation.

A composition comprising a specific amount of a liquid crystalline polymer; a thermoplastic polymer comprising a polyetherimide, a polyarylate, or a poly(arylene ether-sulfone); and a compatibilizing agent comprising a polyepoxide or a poly(ester-carbonate). Methods for making the composition and articles comprising the composition are also provided.

The application provides a tunable phase shifter and an electronic device. The tunable phase shifter comprises a dielectric layer between a first substrate and a second substrate; a first electrode arranged on the first substrate; and a second electrode arranged on the second substrate. The second electrode comprises at least one patch electrode arranged on the second substrate. A projection of the first electrode on the second substrate covers at least part of a projection of the dielectric layer on the second substrate and at least part of a projection of the patch electrode on the second substrate. The first electrode, the dielectric layer and the at least one patch electrode form at least one variable capacitor. This structure facilitates voltage application, does not require additional electrodes and has little effect on the performance of the phase shifter. The capacitance of the variable capacitor can be increased by changing the thickness of the first electrode and / or the patch electrode. When the dielectric constant of the liquid crystal in the variable capacitor changes, the phase shifter can obtain a larger phase shift.