235 results about "Liquid crystal cell" patented technology

The invention relates to the technical field of wireless communication, and discloses a liquid crystal antenna and communication equipment, and the liquid crystal antenna comprises a liquid crystal box and a metal waveguide; the liquid crystal box at least 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 located between the first substrate and the second substrate. The metal waveguide is located on the side, away from the second substrate, of the first substrate. The liquid crystal box further comprises a first metal layer which is located on the side, away from the metal waveguide, of the first substrate. The first metal layer is grounded, and the first metal layer comprises two hollow grooves; the length direction of the metal waveguide is the same as that of the hollow groove; in the direction perpendicular to the plane where the first substrate is located, the metal waveguide and the two hollowed-out grooves are at least partially overlapped. The communication equipment comprises the liquid crystal antenna. According to the invention, insertion loss can be effectively reduced, antenna bandwidth is improved, and antenna gain is ensured.

The utility model discloses a kind of super twist nematic liquid crystal displays, and the display includes surface polarizer, liquid crystal box and bottom polarizer. Among them, liquid crystal box is composed of surface ITO glass, upper PI alignment film, sealing rubber edge, plastic ball rubber edge powder, liquid crystal layer, plastic ball center powder, lower PI alignment film and bottom ITO glass;ITO common electrode is etched on surface ITO glass, and it is distributed on surface ITO glass with wiring, forms separate ITO step and connects drive IC;ITO segment electrode is etched on bottom ITO glass, and it is distributed on bottom ITO glass with wiring, forms separate ITO step and connects drive IC. The present application is separated by setting common electrode and segment electrode on different glass substrate, using independent ITO step and drive IC, optimize the driving mode and structure layout, effectively improve the display performance of super twist nematic liquid crystal display.

A method and system for optical switching with integrated polarization diversity control comprising a beam displacer to receive an input beam and split the input beam into a first beam and a second beam with linear polarization. The first and second beams may be received on a liquid crystal cell that may rotate the first or second beam so that both beams have the same polarization after traversing the liquid crystal cell. Based on the polarization, the output beam may be switched to a port.

An electronic mirror comprises a liquid crystal cell, wherein the liquid crystal cell comprises a first transparent electrode, a second transparent electrode, a liquid crystal layer comprising liquid crystal molecules arranged between the first transparent electrode and the second transparent electrode, and an AC voltage source configured to apply an alternating voltage across the liquid crystal layer between the first transparent electrode and the second transparent electrode, wherein, when a voltage is applied across the liquid crystal layer, the liquid crystal molecules in the liquid crystal layer change their orientation, and the electronic mirror is configured to apply a varying voltage across the liquid crystal layer which gradually decreases from outer areas towards the center of the liquid crystal layer such that the refraction index of the liquid crystal layer gradually varies from outer areas towards the center of the liquid crystal layer.

The application provides an image generating unit and a display device. The image generating unit comprises a backlight module, a first liquid crystal panel, a second liquid crystal panel and a first polarizer; the first liquid crystal panel comprises a linear polarization structure, a first liquid crystal cell and a second polarizer arranged along the transmission direction of the outgoing light rays of the backlight module; the second liquid crystal panel comprises a second liquid crystal cell and a color filter; at least one of the components in the first liquid crystal panel, the first liquid crystal panel and the second liquid crystal panel, the components in the second liquid crystal panel and the second liquid crystal panel and the first polarizer is provided with an air gap with a preset width. The application uses a double-screen structure, the black-and-white first liquid crystal panel realizes regional dimming, which is beneficial to improving the contrast ratio; the color second liquid crystal panel removes the lower polarizer and is provided with a higher resolution, which is beneficial to improving the display effect; the structures are separated by a distance, the heat can circulate in the air, thereby enhancing the heat dissipation effect and reducing the heat.

Provided is a weak anchoring liquid crystal alignment agent which is used for forming a liquid crystal alignment film of a liquid crystal cell that has liquid crystals and the liquid crystal alignment film, and which comprises: at least one polymer (A) that is selected from the group consisting of polyamic acids, polyamic acid esters, polyimides, polyamides, and polyuria; and a polymer (B) that is compatible with the liquid crystals and that exhibits weak anchoring properties, said weak anchoring liquid crystal alignment agent containing a graft copolymer in which the polymer (A) and the polymer (B) are bonded.

Provided are an optical element, a variable-focus element, and a head-mounted display, the optical element comprising: a first liquid crystal cell having first liquid crystal molecules and a first electrode; and a second liquid crystal cell having second liquid crystal molecules and a second electrode, the first electrode and the second electrode being configured to be capable of switching between a first state and a second state, the first state being a state in which the second liquid crystal molecules are twisted and the first liquid crystal molecules are vertically aligned, the second state being a state in which the first liquid crystal molecules are twisted and the second liquid crystal molecules are vertically aligned, the azimuthal angle of the alignment direction of the second liquid crystal molecules on the third substrate side in the first state and the azimuthal angle of the alignment direction of the second liquid crystal molecules on the fourth substrate side being, respectively, an angle obtained by rotating the azimuthal angle of the alignment direction of the first liquid crystal molecules on the first substrate side in the second state and the azimuthal angle of the alignment direction of the first liquid crystal molecules on the second substrate side in the second state by 1 / 4 in the same direction.

An electronic eyewear device including a spatial dimming pixel panel within an optical assembly that delivers improved backlighting conditions for displayed images. The spatial dimming pixel panel is spatially dimmed where an image is positioned on a display, and the unoccupied area of the display is not dimmed (undimmed), thereby unaltering the real-world view through that portion of the display. The spatial dimming pixel panel is made of multiple liquid crystal cells arranged in a gridded orientation with a dye-doped or guest-host liquid crystal system having a phase change mode with homeotropic alignment. The spatial dimming pixel panel absorbs nonpolarized light when a voltage is applied across the cells and passes nonpolarized light in the absence of a voltage across the cells.

The application relates to the technical field of optical elements, in particular to a volume polarization grating and a preparation method thereof, an optical waveguide and a display device, which comprises the following steps: step 100: obtaining a liquid crystal cell; step 200: irradiating a photoalignment agent coating layer on the liquid crystal cell with light of a first wavelength to induce patterned orientation; and step 300: irradiating a premix in the liquid crystal cell with light of a second wavelength to make reactive mesogenic monomers polymerize and solidify, thereby forming a volume polarization grating. The application realizes time sequence decoupling and synergistic optimization of "orientation writing-structure locking" in a single processing flow, realizes process simplification and time sequence decoupling, has comprehensive advantages such as a more complete structure and more stable performance, and can effectively solve technical problems in existing PVG patterning processing, such as complex flow, mutual interference between orientation and solidification, and limited efficiency and consistency.

A viewing angle control system includes sequentially: a first polarizer, a first optical compensation layer, a first TN-mode liquid crystal cell, a second polarizer, a second TN-mode liquid crystal cell, a second optical compensation layer, and a third polarizer. The first and second optical compensation layers each exhibit minimum retardation in a tilted direction rather than in a normal direction. The system provides high brightness in a front direction and low brightness in an oblique direction at a specific azimuthal angle when applied to a light source.

The present invention addresses the problem of providing a viewing angle control system capable of switching between a light-blocking mode and a transmission mode when viewing from a tilt direction at a prescribed azimuth angle, and making it easier to view an image in the light-blocking mode and in the transmission mode. This viewing angle control system has a light-absorbing anisotropic layer, a liquid crystal cell, and a polarizer in this order, and is characterized in that: the angle formed by the transmittance center axis of the light-absorbing anisotropic layer and the normal line of the light-absorbing anisotropic layer is 0-45 degrees; an optical compensation layer is provided between the light-absorbing anisotropic layer and the liquid crystal cell and / or between the liquid crystal cell and the polarizer, and no other light-absorbing anisotropic layer or other polarizer is provided between the light-absorbing anisotropic layer and the polarizer.

An optical device includes an optical element including a liquid crystal cell configured to distribute light emitted from a light source, a power supply part configured to generate first and second potentials, a control signal generation circuit part configured to generate a control signal that controls a pulse width of each of the first and second potentials, and a switch circuit part configured to output a first potential signal including the first potential with a first pulse width and the second potential with a second pulse width based on the control signal. The liquid crystal cell includes a first substrate on which first and second transparent electrodes are alternately arranged in a first direction, and a second substrate on which third and fourth transparent electrodes are alternately arranged in a second direction. The first potential signal is input to the first transparent electrode.

A display device having a rear surface includes: a first polarizer having a first main surface; a second polarizer disposed closer to the rear surface than the first polarizer, the second polarizer to be opposed to the first main surface of the first polarizer; a liquid crystal cell between the first polarizer and the second polarizer; and a touch function layer between the first polarizer and the liquid crystal cell, the touch function layer having an electrode that detects a touch input, the touch function layer being disposed on the first main surface of the first polarizer.

The invention relates to the technical field of polymer dispersed liquid crystal, and discloses a perovskite quantum dot / polymer dispersed liquid crystal film and a preparation method thereof, and the method comprises the following steps: preparing a toluene solution of perovskite quantum dots, and adding dithiol as a ligand to carry out surface modification on the perovskite quantum dots to obtain a perovskite quantum dot / polymer dispersed liquid crystal film; cleaning by using a mixed solvent of toluene and ethyl acetate in a volume ratio of 1: 2-2: 1, and centrifuging to obtain surface-modified perovskite quantum dots; uniformly mixing the surface-modified perovskite quantum dots with an ultraviolet polymerizable monomer, a cross-linking agent, liquid crystal and an ultraviolet initiator, injecting the mixture into a liquid crystal box, and performing ultraviolet curing to obtain the perovskite quantum dot / polymer dispersed liquid crystal film. The perovskite quantum dot / polymer dispersed liquid crystal film with enhanced long-wave infrared emissivity, fluorescent pattern and information encryption, provided by the invention, has wide application prospects in liquid crystal display, intelligent glass, energy-saving building materials, automobile decoration and related fields.

An electrically switchable liquid crystal cell (10) is provided together with a lens (50) having this liquid crystal cell, and a method for manufacturing the liquid crystal cell. The liquid crystal cell (10) has a diffractive optical element (12) and a liquid crystal material (14) that can be switched between a mismatched (unswitched) state and a matched (switched) state. In the mismatched state, the effective refractive index of the liquid crystal material (14) is different from the effective refractive index of the substrate (18) of the diffractive optical element (12). In the matched state, the effective refractive index of the liquid crystal material (14) matches the effective refractive index of the substrate (18). In the matched state, the diffractive optical element does not contribute to the focal power of the lens. The diffractive optical element (12) has a number of peaks (20) and valleys (30) with rounded corners.

The invention provides a liquid crystal cell thickness detection method, device, equipment and medium based on coherence tomography, and the method comprises the following steps: generating an incident light beam by using a wide-spectrum low-coherence light source, and dividing the incident light beam into reference light and sample light of which the propagation directions are perpendicular to each other by using a beam splitter; the reference light is reflected back to the beam splitter after being vertically incident to the reflective mirror, and is propagated to an acquisition end along an original propagation direction; enabling the sample light to vertically enter the to-be-detected silicon-based liquid crystal device, then reflecting the sample light back to the beam splitter, changing the direction through the beam splitter, and propagating the sample light to an acquisition end; the interference signals of the reference light and the sample light are collected at the collection end, and the depth information of the to-be-measured silicon-based liquid crystal device is obtained after FFT processing is carried out on the interference signals, so that the problem that the thickness of a small-size liquid crystal box is difficult to accurately measure is solved.

A quantitative phase contrast imaging system comprises a light source configured to generate light and to direct the light to a sample, wherein the light comprises nonlinearly polarized light; a first lens configured to receive light from the sample; a phase filter, wherein the first lens is configured to focus the light from the sample onto the phase filter, and the phase filter is configured to modulate multiple components of the nonlinearly polarized light simultaneously (e.g., geometric phase interferometry); a second lens configured to receive light from the phase filter; and a polarized camera, wherein the second lens is configured to collimate the light beam from the phase filter to the polarized camera and the polarized camera is configured to image the sample in response to the light from the phase filter. In absence of the second lens, the camera can be placed at the image plane.

The invention relates to a method for preparing a lenticular lens on a conductive surface of a transparent support, the method comprising imprinting a curable resin on the support with a lenticular mold, followed by curing the resin and removing the mold to yield a lenticular device comprising the transparent support and a lenticular lens provided thereon. A small part of the curable resin comprises conductive particles, which after curing provide the lenticular lens with a conductive path between the conductive support surface and the lenticular lens surface. The conductive support surface is in this way easily and directly electrically accessible as a planar electrode, when the lenticular device is incorporated in an electrically switchable liquid crystal cell. Accordingly, the invention further relates to such lenticular device, to a liquid crystal cell comprising such lenticular device, and to an autostereoscopic display device comprising such liquid crystal cell.

To visually distinguish switchable information or decoration and to perform this without increasing the thickness of an LCD cell, with less complexity and without taking up space.SOLUTION: The display device comprises a liquid crystal cell (2) formed from two transparent plates (4, 6), defines a useful zone (12) so as to define a visible zone of the liquid crystal cell, and incorporates electrodes forming a switchable display of an item of information and / or of a decoration. The liquid crystal cell comprises, in the useful zone, a plurality of polarisers 16, 18 arranged in a plurality of distinct zones 17, 19, respectively, on the external face 5 of one of the two transparent plates, each partially forming a switchable display. The two polarizers have different optical properties or different polarization directions between them and are configured to visually create a difference between the respective portions of the two polarizers and / or the respective portions of the switchable display in the respective discrete zones.SELECTED DRAWING: Figure 1

The illumination device includes a light emitting module; and an optical element in which a first liquid crystal cell and a second liquid crystal cell are stacked to transmit light from the light emitting module, the first liquid crystal cell and the second liquid crystal cell including a first substrate in which a first transparent electrode and a second transparent electrode are alternately arranged in a first direction, and a second substrate in which a third transparent electrode and a fourth transparent electrode are alternately arranged in a second direction intersecting the first direction, the light emitting module including a light source, a light guide plate including an end surface on which light from the light source is incident and a first surface from which the incident light is emitted, and a prism sheet arranged opposite the first surface, the second substrate of the first liquid crystal cell being adjacent to the first substrate of the second liquid crystal cell, the first surface including a plurality of first grooves extending in a third direction intersecting the first direction and the second direction.

This application belongs to the field of display technology, specifically relating to a display panel and its manufacturing method, and a display device. The display panel includes a first substrate, a second substrate, and a spacer. The second substrate is disposed on one side of the first substrate. One of the first substrate and the second substrate is an array substrate, and the other is an opposing substrate. The spacer is disposed between the first substrate and the second substrate. The spacer includes spacer pillars and balls. The spacer pillars are disposed on the first substrate, and the balls are disposed on the top of the spacer pillars away from the first substrate. The balls are capable of rolling under the force applied by the second substrate. Because the balls are rotatably disposed in the receiving groove, the friction between the spacer and the second substrate is rolling friction. The rate at which the top of the spacer shortens due to wear is significantly reduced, improving the display uniformity caused by changes in the thickness of the liquid crystal cell, thereby improving the display effect of the display panel.

The application discloses a display device with switchable viewing angle and a driving method thereof. The display device comprises a backlight module and a display panel, and the display panel can be switched between a wide viewing angle and a narrow viewing angle. The backlight module comprises a backlight source and a first liquid crystal box, and the first liquid crystal box is used for controlling the astigmatic range of the backlight module. The first liquid crystal box comprises a first substrate, a second substrate and a polymer liquid crystal layer between the first substrate and the second substrate. When the display device displays in the wide viewing angle, the display panel is switched to the wide viewing angle mode, and the astigmatic range of the backlight module is adjusted to control the viewing angle range of the wide viewing angle display. When the display device displays in the narrow viewing angle, the display panel is switched to the narrow viewing angle mode, and the astigmatic range of the backlight module is adjusted to control the viewing angle range of the narrow viewing angle display. By arranging the first liquid crystal box in the backlight module, the astigmatic range of the backlight module can be adjusted arbitrarily, so that the display device has a large adjustable viewing angle range when displaying in the wide viewing angle and the narrow viewing angle.

The present application relates to a liquid crystal elastomer microstructure preparation method based on photopolymerization phase separation, the method comprising S1, for a first liquid crystal cell with a specified thickness, filling a mixture of photopolymer monomers and liquid crystals between the first substrate and the second substrate of the first liquid crystal cell, the first substrate being a substrate without an alignment layer, and the second substrate being coated with an alignment layer; S2, covering a gray-tone mask on the first surface of the first substrate of the first liquid crystal cell; the first surface of the first substrate being the surface away from the mixture; S3, performing ultraviolet exposure on the gray-tone mask to separate the photopolymer monomers and the liquid crystals, and obtaining a composite structure; S4, based on a pre-configured liquid crystal elastomer prepolymer, processing the composite structure according to a preset liquid crystal elastomer microstructure preparation strategy, and obtaining a liquid crystal elastomer microstructure. The liquid crystal elastomer microstructure film prepared by the method has a thickness ranging from several microns to tens of microns, good alignment, and simple manufacturing process, low cost and high precision.

An in-plane switching liquid crystal display, comprising a MiniLED backlight (101), a first polarizer (102), a liquid crystal cell (103) and a second polarizer (104), wherein the liquid crystal cell (103) is located between the first polarizer (102) and the second polarizer (104); the directions of the absorption axes of the first polarizer (102) and the second polarizer (104) are perpendicular to each other; the direction of the optical axis of the liquid crystal cell (103) is parallel to the absorption axis of the first polarizer (102); a first protective film (105) on the second polarizer (104) comprises a negative biaxial retardation film and a positive C-plate, the negative biaxial retardation film having an in-plane retardation value of 50-250 nm and a thickness-direction retardation value of 60-260 nm at a wavelength of 550 nm; and the positive C-plate has an in-plane retardation value of -20-20 nm and a thickness-direction retardation value of -300-0 nm at a wavelength of 550 nm. In this way, the problem of halos caused by using the MiniLED backlight (101) to perform local dimming can be solved.

There are provided an optical computing method and system for inspecting in through light a container. The container is illuminated by elementary emitting areas each emitting a polarized emitted light with an emitted polarization property of interest that varies according to a law of periodic variation which, over a primary period, follows a triangular variation as a function of the position of the elementary emitting area along the primary direction. Digital images are acquired, with at least one camera, with interposition of a linear analyzer having a given axis of polarization for a partial digital image. At least one primary raw refraction image is calculated, each pixel of which is representative of the refraction undergone by the light. The system advantageously includes a two-dimensional matrix of liquid crystal cells.

The invention relates to an illuminable laminated vehicle glazing comprising a guiding layer, a liquid crystal cell with variable light absorption and diffusion, the liquid crystal cell containing an electroactive layer (93) comprising liquid crystals, a polymer phase and dichroic dyes, and an optical insulating coating on a non-fluoropolymer carrier film or on the liquid crystal cell. Figure 1

The application discloses a preparation method of a flexible intelligent liquid crystal polymer driver and relates to the technical field of liquid crystal polymer materials, and comprises the following steps: step one, configuring a liquid crystal mixture: one or more liquid crystal polymer monomers and a photoinitiator are mixed, and after being heated and melted, the mixture is uniformly shaken and stirred to obtain the liquid crystal mixture; step two, preparing a liquid crystal box: a liquid crystal box with a main body 90-degree twist orientation and one end structured orientation is prepared; step three, preparing a long-strip liquid crystal polymer film driver; and step four, driving and optically regulating the long-strip liquid crystal polymer film driver; the liquid crystal polymer driver prepared by the method has optical microstructures, can be bent and deformed under thermal field stimulation, and can also be regulated for light beam deflection to generate self-driven, self-feedback and self-sustaining dynamic optical function effects.

This invention relates to the field of cholesteric liquid crystal display technology. The invention discloses a cholesteric liquid crystal display device and its fabrication method. By using a dam structure to divide a single-layer liquid crystal cell into multiple pixel regions, and by injecting liquid crystal material containing a photosensitive chiral agent, selective exposure processing can form multiple cholesteric liquid crystals with different pitches in situ within a single liquid crystal layer, each reflecting different colors of light. This achieves full-color display in a single-layer structure, significantly simplifying the device structure, reducing overall thickness and manufacturing costs, and minimizing light loss due to light penetration through multiple layers. Furthermore, during processing, only two liquid crystal injections are required, along with illumination processing, to obtain three pixel regions reflecting different colors, greatly reducing the number of device processing steps.

The application discloses a reflective display device and a driving method. The reflective display device comprises a first liquid crystal box and a second liquid crystal box, and has a first color pixel unit, a second color pixel unit and a third color pixel unit. A color film substrate of the first liquid crystal box is transparent in a region corresponding to the first color pixel unit, is provided with a second color color resistance layer in a region corresponding to the second color pixel unit, and is provided with a third color color resistance layer in a region corresponding to the third color pixel unit. One of first cholesteric liquid crystal molecules of the first liquid crystal box and second cholesteric liquid crystal molecules of the second liquid crystal box reflects first color light when in a reflective state, and the other reflects complementary color light of the first color light when in the reflective state. The filtering wavelength of the second color color resistance layer and the filtering wavelength of the third color color resistance layer both partially overlap with the wavelength of the complementary color light. Thus, the reflective display device can realize color display by adopting double liquid crystal boxes.

The invention belongs to the technical field of display, and particularly relates to a spacer preparation method, a substrate and a display panel, and the preparation method comprises the steps: providing a photoresist layer mixed with a supporting material on a substrate; patterning processing is carried out on the photoresist layer to form a plurality of spacers, and part of the supporting material is exposed on the outer surfaces of the spacers; a part of the supporting material is removed, and the part of the supporting material comprises the supporting material exposed on the surface of the spacer and the internal supporting material communicated with the outside through the exposed part, so that the spacer forms a pore structure. According to the liquid crystal cell, the pore structure is formed in the spacer, the number of liquid crystal molecules contained in the liquid crystal cell is increased, and the problem of touch Mura caused by insufficient liquid crystal amount is effectively solved; moreover, the proportion of the organic material in the spacer can be reduced through the internal supporting material, the generation of low-temperature bubbles is inhibited, and the display quality and reliability of the display panel are improved.