712 results about "Liquid crystal cell" patented technology

The invention 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 the reflective display device is provided with 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 in a transparent state in an area corresponding to a first color pixel unit, and a second color resistance layer and a third color resistance layer corresponding to a third color pixel unit are arranged in an area corresponding to a second 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 in a reflection state, and the other one reflects complementary color light of the first color light in the reflection state; and the filtering wavelength of the second color resistance layer and the filtering wavelength of the third color resistance layer are partially overlapped with the wavelength of the complementary color light. Therefore, the reflective display device can realize color display by adopting the double liquid crystal boxes.

The invention discloses a liquid crystal image recognizer, a preparation method thereof and an image recognition device. The liquid crystal image recognizer comprises a liquid crystal box and a reflecting mirror; the liquid crystal box comprises a first substrate and a second substrate which are oppositely arranged; the first rotation cholesteric liquid crystal layer and the second rotation cholesteric liquid crystal layer are located between the first substrate and the second substrate in a stacked mode; the first rotation cholesteric liquid crystal layer and the second rotation cholesteric liquid crystal layer are provided with a plurality of orientation structures which are distributed at equal intervals and are optimized by a deep learning algorithm; the reflector is located on the side, away from the second substrate, of the first substrate, and a preset distance is arranged between the reflector and the first substrate, so that a light beam turn-back framework is formed between the reflector and the liquid crystal box. The liquid crystal image recognizer provided by the invention can realize an independent image recognition function on circular polarization incident light with two kinds of chirality, and can also realize multifunctional image recognition of wavelength multiplexing through liquid crystal box cascading of devices, so that the functional diversity and multiplexing dimension of the all-optical image recognizer are improved.

The purpose of the present invention is to provide a device and method for testing the millimeter wave dielectric properties of liquid crystal materials under electrical orientation, which belongs to the field of microwave testing technology. In the dielectric constant test of liquid crystal materials, the present invention designs a liquid crystal box composed of multiple layers of dielectrics, and innovatively uses multiple layers of dielectrics to form a top-bottom symmetrical TM 0n0 The mode double-sided circular patch resonator, and the electric field distribution inside it passes through the multi-layer medium to be tested and is perpendicular to the metal disc. Therefore, by utilizing its internal field distribution characteristics, the structure can use a mode with a higher resonant frequency, greatly broadening the test frequency range, and the test frequency can reach 110GHz. Therefore, the dielectric property test device of the present invention can realize the wide-band dielectric property test of liquid crystal materials in the millimeter wave frequency band, and the test device is simple and easy to implement.

The utility model provides a display panel and a display device, relates to the technical field of display, and solves the problem of light leakage at four corners of a curved surface display product during display due to bending stress in the bending process of the curved surface display product. The display panel comprises a liquid crystal box, a first polaroid and a second polaroid. The liquid crystal box 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 first polaroid is located on the side, back on to the liquid crystal box, of the first substrate. The second polaroid is located on the side, back on to the liquid crystal box, of the second substrate. The thickness of the second polaroid is greater than that of the first polaroid; and the display panel is a curved display panel which is bent towards the second polaroid.

The embodiment of the utility model discloses a display panel and a display device, the display panel comprises a first liquid crystal box, a second liquid crystal box and a third liquid crystal box which are stacked, and the first liquid crystal box, the second liquid crystal box and the third liquid crystal box reflect light of different colors respectively; a plurality of first data lines, a plurality of second data lines and a plurality of third data lines, the plurality of first data lines are connected with the first liquid crystal box, the plurality of second data lines are connected with the second liquid crystal box, and the plurality of third data lines are connected with the third liquid crystal box; the plurality of first data lines are connected with one ends of the plurality of second data lines in a one-to-one correspondence manner through the first circuit board, and the other ends of the plurality of second data lines are connected with one ends of the plurality of third data lines in a one-to-one correspondence manner through the second circuit board; and corresponding data voltages are written into the first liquid crystal box, the second liquid crystal box and the third liquid crystal box in a time-sharing manner. According to the scheme, the number of used driving chips can be reduced, and the manufacturing cost can be reduced.

An augmented reality display having a world side and a user side includes a world side optical structure including a geometric-phase lens, an eyepiece waveguide, and a user side optical device. A dimming structure having a linear polarizer, a liquid crystal cell, and a quarter-wave plate provides attenuation. A second geometric-phase lens may be part of the user side optical device.

An optical element includes a first liquid crystal cell, a second liquid crystal cell, a third liquid crystal cell, and a fourth liquid crystal cell arranged in this order to overlap one another. Each of the first liquid crystal cell, the second liquid crystal cell, the third liquid crystal cell, and the fourth liquid crystal cell includes a plurality of first electrodes arranged in a stripe form and extending in a first extending direction, a first orientation film over the plurality of first electrodes, a liquid crystal layer over the first orientation film, a second orientation film over the liquid crystal layer, and a plurality of second electrodes located over the second orientation film, arranged in a stripe form, and extending in a second extending direction intersecting the first extending direction. More detailed structures will be explained in the specification.

The invention provides a volume holographic grating preparation method, a volume holographic grating, an optical waveguide and a display device, and the method comprises the steps: obtaining a to-be-exposed holographic material which comprises a thermosetting liquid crystal material; providing a liquid crystal box, and filling the liquid crystal box with the holographic material to be exposed; based on a preset light source, performing exposure treatment on the holographic material to be exposed in the liquid crystal box to obtain a grating to be treated; and applying a preset electric field to the to-be-processed grating and heating the to-be-processed grating to which the preset electric field is applied so as to cure the thermosetting liquid crystal molecules oriented by the preset electric field in the to-be-processed grating, thereby obtaining the volume holographic grating. According to the volume holographic grating, the arrangement state stability of the liquid crystal molecules of the volume holographic grating at a relatively high temperature can be improved, so that the diffraction efficiency of the volume holographic grating is ensured, and the optical performance degradation of the volume holographic grating in a high-temperature state is avoided.

A lighting device includes a light source including at least two types of light emitting elements with different color temperatures, an optical element including a plurality of liquid crystal cells and configured to control a distribution of light emitted from the light source, and a control unit configured to control the light source. The control unit controls the optical element to change from a first light distribution state to a second light distribution state different from the first light distribution state. The control unit controls the light source so that a color temperature of light emitted in a direction perpendicular to a surface of the optical element is the same in the first light distribution state and the second light distribution state.

The invention provides a double-sided reflection display panel. The double-sided reflection display panel comprises a first dimming liquid crystal box, a first transflective layer, a second transflective layer and a second dimming liquid crystal box which are arranged in sequence. A first transflective layer and a second transflective layer are arranged between a first dimming liquid crystal box and a second dimming liquid crystal box, a first light transmitting shaft of the first transflective layer is parallel to a second light reflecting shaft of the second transflective layer, and a second light transmitting shaft of the second transflective layer is parallel to a first light reflecting shaft of the first transflective layer; when the double-sided reflection display panel is used for picture display, light with the polarization direction parallel to the first reflection axis can be reflected and utilized by the first transmission and reflection layer, light with the polarization direction parallel to the second reflection axis can be reflected and utilized by the second transmission and reflection layer, and therefore the utilization rate of ambient light is increased, and the display brightness and the display effect are improved.

The invention discloses a liquid crystal polymer film based on a covalent organic framework photo-thermal agent and a preparation method and application thereof, and the method comprises the following steps: preparing COF powder by using tetra (4-aminophenyl) porphyrin and an aldehyde monomer as raw materials; the preparation method comprises the following steps: adding COF powder and aniline into tetrahydrofuran, and carrying out ultrasonication to obtain COF nanoparticles; the COF nanoparticles and a liquid crystal mixture are evenly mixed and then heated, an evenly-mixed precursor solution is obtained, and the liquid crystal mixture is composed of liquid crystal monomers HCM 021, HCM 020 and C6M and an initiator Irgacure 651; and pouring the precursor solution into a hybridized and oriented liquid crystal box, and polymerizing under ultraviolet light to obtain the hybridized and oriented COF-liquid crystal polymer film. According to the invention, COF nanoparticles are added into a liquid crystal substrate as a photo-thermal agent, so that the COF-liquid crystal polymer film can actuate the liquid crystal polymer substrate to generate reversible curling and bending movement under the condition of volatile solvent steam or near-infrared illumination; the method has a good application prospect in the fields of mechanical execution robots, near-infrared light sensors, solvent vapor sensors and the like.

The invention provides a polarization body holographic grating, a preparation method thereof and display equipment, and relates to the technical field of grating preparation. The preparation method comprises the following steps: preparing a first liquid crystal mixture, and filling a first liquid crystal box with the first liquid crystal mixture; ultraviolet curing treatment is carried out on the first liquid crystal box, so that the first photopolymerization liquid crystal is subjected to photopolymerization reaction, and a polymer template is formed; removing the inert nematic liquid crystal in the polymer template to obtain a second liquid crystal box; a second liquid crystal mixture is prepared and added into the second liquid crystal box, and the second liquid crystal mixture at least comprises a second photopolymerization liquid crystal and a second chiral agent; and carrying out ultraviolet curing treatment on the second liquid crystal box, so that the second photopolymerization liquid crystal is subjected to photopolymerization reaction, and the polarizer holographic grating is prepared. The invention aims to realize preparation of the polarization body holographic grating with wide reflection bandwidth and adjustable grating thickness and polarized light rotation direction.

The utility model discloses a reflective display panel and a display device. The reflective display panel comprises a backlight module, a first liquid crystal box, a second liquid crystal box and a third liquid crystal box, wherein the first liquid crystal box, the second liquid crystal box and the third liquid crystal box are sequentially stacked on the backlight module; the first liquid crystal box comprises a first array substrate, a first opposite substrate and a first cholesteric liquid crystal layer; the first cholesteric liquid crystal layer is used for reflecting light of a first color in a reflection state; the second liquid crystal box comprises a second array substrate, a second opposite substrate and a second cholesteric liquid crystal layer; the second cholesteric liquid crystal layer is used for reflecting light of a second color in a reflection state; the third liquid crystal box comprises a third array substrate, a third opposite substrate and a third cholesteric liquid crystal layer; the third cholesteric liquid crystal layer is used for reflecting light of a third color in a reflection state; the backlight module emits backlight from the backlight surface of the first liquid crystal box to the first liquid crystal box. The reflective display panel not only can display when ambient light is dark, but also does not have the problem of depth of field.

The invention provides a liquid crystal antenna and a communication device, and relates to the technical field of antennas. The liquid crystal antenna comprises a first substrate, a second substrate and a liquid crystal box, the first substrate and the second substrate are oppositely arranged, and the liquid crystal box is located between the first substrate and the second substrate; the first substrate comprises a plurality of first radiation units, the plurality of first radiation units are arranged at intervals, and the liquid crystal box comprises a liquid crystal phase shifter arranged opposite to the first radiation units; a first heating wire is further embedded in the first substrate or on the surface of the first substrate, the first heating wire is configured to generate heat to heat the liquid crystal box when powered on, and the orthographic projection of a part of the structure of the first heating wire in the liquid crystal box is located between the orthographic projections of two adjacent first radiation units in the liquid crystal box. And the response speed of the liquid crystal antenna is 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.

The invention discloses a display device and a manufacturing method thereof. The display device comprises a display panel, a liquid crystal box and a linearly polarized light rotating structure arranged between the display panel and the liquid crystal box, the liquid crystal box is arranged on the light emitting side of the display panel, and the liquid crystal box comprises a first substrate, a second substrate, a lens set, a first orientation layer, a liquid crystal layer and a second orientation layer, the lens group is located between the first substrate and the second substrate, a plurality of lenses of the lens group extend in the first direction, the orientation direction of the first orientation layer and the orientation direction of the second orientation layer are parallel to the first direction, and an included angle is formed between the polarization direction of linearly polarized light emitted from the display panel and the first direction. The linearly polarized light rotating structure is configured to rotate the polarization direction of the emergent light to be parallel to the first direction. Due to the fact that the arrangement direction of the liquid crystal molecules needs to be parallel to the polarization direction, the arrangement direction of the liquid crystal molecules can be parallel to the first direction, arrangement of the liquid crystal molecules has better consistency, and occurrence of liquid crystal molecule misalignment is reduced to a great extent.

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.

An XR display system includes a near-eye optical see-through XR display having an image presentation component with an eye-facing side and a world-facing side and configured to present virtual visual content to a user's eye from locations across an image presentation surface of the eye-facing side. A dynamic push lens positioned on the world-facing side and a dynamic pull lens positioned on the eye-facing side each include a liquid crystal cell dynamically switchable by an electrical stimulus between an inactive state and an active state. In the active state, the dynamic push lens converges environmental light approaching the image presentation component from the world-facing side by applying a positive optical power, and the dynamic pull lens diverges light passing out of the eye-facing side of the image presentation component toward the user's eye by applying a negative optical power.

The utility model discloses a display panel and a display device, the display panel is provided with a main display area and a virtual key area located at the edge of the main display area, the display panel comprises a first liquid crystal box and a second liquid crystal box, the projection of the first liquid crystal box on the display panel at least covers the virtual key area, and the projection of the second liquid crystal box on the display panel at least covers the virtual key area. The projection of the second liquid crystal box on the display panel coincides with the main display area. The first liquid crystal box comprises an opposed substrate, a first array substrate and a cholesteric liquid crystal layer located between the opposed substrate and the first array substrate, a first pixel electrode is arranged on the first array substrate, and a first common electrode is arranged on the opposed substrate; the first pixel electrode and the first common electrode are used for controlling the cholesteric liquid crystal layer to be switched between a reflection state and a scattering state; the second liquid crystal box is used for controlling gray scale display of pictures in the main display area. The first liquid crystal box adopting the cholesteric liquid crystal is arranged in the virtual key area, so that the key icons can be displayed by utilizing ambient light, and the backlight power consumption of the virtual key area is reduced.

The invention discloses a reflective display device and a control method, the reflective display device comprises a liquid crystal box and an electronic ink screen stacked on the lower side of the liquid crystal box, and first pixel units of the liquid crystal box are in one-to-one correspondence with second pixel units of the electronic ink screen; the liquid crystal box comprises a first opposed substrate, a first array substrate and a cholesterol liquid crystal layer; the electronic ink screen comprises a second opposite substrate, a second array substrate and an ink capsule, a second pixel electrode is arranged on the second array substrate, an auxiliary electrode is arranged on the second opposite substrate, and the second pixel electrode comprises a first sub-pixel electrode block and a second sub-pixel electrode block which are independent from each other. The electronic ink screen is arranged below the cholesterol liquid crystal box, and the second pixel electrode of the electronic ink screen is divided into the first sub-pixel electrode block and the second sub-pixel electrode block which are mutually independent, so that the electronic ink screen can control at least three kinds of brightness, and the gray scale brightness of the cholesterol liquid crystal box is richer.

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 viewed from an oblique direction at a predetermined azimuth angle, wherein an image is more difficult to view in the light-blocking mode and easier to view in the transmission mode.　A viewing angle control system (10a) according to the present invention has a light absorption anisotropic layer (12), a liquid crystal cell (14), and a polarizer (16) in this order. The angle formed by the transmittance central axis of the light absorption anisotropic layer (12) and the normal of the light absorption anisotropic layer (12) is 0-45°. The viewing angle control system has an optical compensation layer (18) between the light absorption anisotropic layer (12) and the liquid crystal cell (14) and / or between the liquid crystal cell (14) and the polarizer (16), and does not include another light absorption anisotropic layer or another polarizer between the light absorption anisotropic layer (12) and the polarizer (16).

A laminated glass capable of suppressing an appearance defect of a liquid crystal cell includes: a first transparent substrate; a second transparent substrate disposed oppositely to the first transparent substrate; a liquid crystal cell provided between the first transparent substrate and the second transparent substrate; a first intermediate layer composed of an OCR and provided between the first transparent substrate and the liquid crystal cell; a second intermediate layer composed of an OCA and provided between the second transparent substrate and the liquid crystal cell; and a covering member provided between the liquid crystal cell and the first transparent substrate. The dimmer cell has a region overlapping the covering member and a region not overlapping the covering member.

A pair of eyeglasses may include one or more adjustable lenses. An adjustable lens may include a stack of liquid crystal cells with passive matrix electrode arrays. Each passive matrix electrode array may include a pair of orthogonal electrodes that are rotated relative to other pairs of orthogonal electrodes in the stack. Control circuitry may apply different voltage profiles to the passive matrix electrode arrays to create the desired lens characteristics in the adjustable lens. The voltage profiles may be based on a stored look-up table that maps different target lens characteristics to different voltage profiles for the passive matrix electrode arrays. The target lens characteristics may include at least one of a target lens power and a target optical aberration correction. The look-up table may be based on information gathered during design and manufacturing using numerical optimization techniques.

The present invention discloses a beam divergence angle electrically controllable nematic liquid crystal device, which includes stacked liquid crystal cells. The liquid crystal cell includes two stacked liquid crystal cells. The liquid crystal cell includes upper and lower substrates, a nematic liquid crystal layer is provided between the upper and lower substrates, an upper ITO electrode is plated on one side of the upper substrate, a lower ITO electrode is plated on one side of the lower substrate, and openings are provided on the upper ITO electrode and / or the lower ITO electrode. Looking from the direction perpendicular to the upper ITO electrode, the openings on the upper and lower ITO electrodes complement each other to form a regular array, and the upper and lower substrates and the nematic liquid crystal layer form a micro liquid crystal lens through the openings. The outgoing light beams emitted by adjacent micro liquid crystal lenses of the incident light beam overlap with each other in a divergent shape, and the divergence angle size is controllable. The present invention realizes the effective control and adjustment of the divergence angle size of the outgoing light beam, is easy to implement, has a low cost, and is suitable for popularization and popularization.

An optical element is provided that can control the light distribution or light distribution pattern. An optical element includes two stacked liquid crystal cells (120, 110), wherein each liquid crystal cell includes: a first substrate (111-1, 121-1) having a first transparent electrode (112-1, 122-1) and a second transparent electrode (112-2, 122-2) alternately disposed along a first direction; a second substrate (111-2, 121-2) having a third transparent electrode (112-3, 122-3) and a fourth transparent electrode alternately disposed along a second direction intersecting the first direction; and a liquid crystal layer (113, 123) located between the first substrate and the second substrate, wherein the second substrate (111-2) of one liquid crystal cell is adjacent to the first substrate (121-1) of the other liquid crystal cell.

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.

The invention provides a display module and a display device, and relates to the technical field of display, the display module comprises a backlight module, a light control liquid crystal box and a display liquid crystal box, the light control liquid crystal box and the display liquid crystal box are arranged on the light emitting side of the backlight module, and the light control liquid crystal box is located between the display liquid crystal box and the backlight module; the light control liquid crystal box is at least configured to control the transmission area and light intensity of light rays emitted by the backlight module to the display liquid crystal box; at least one of the display liquid crystal box and the light control liquid crystal box is in a normally white mode. Therefore, the overall transmittance of a display product can be improved, and power consumption can be saved.

A lighting device includes a light source, a first liquid crystal cell over the light source, and a second liquid crystal cell over the first liquid crystal cell. The light source includes light-emitting elements arranged in a matrix shape with m rows and n columns. The first and second liquid crystal cells each include: a first substrate; first electrode groups located over the first substrate and arranged in a matrix shape with m rows and n columns; a liquid crystal layer over the first electrode groups; and a second substrate over the liquid crystal layer. In each of the first and the second liquid crystal cells, the first electrode groups each have first electrodes extending in a row direction, and the light-emitting elements in a jth row and a kth column overlaps the first electrode group located in the jth row and the kth column.

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.