477 results about "Liquid crystal cell" patented technology

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.

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 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 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.

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.

The invention discloses a liquid crystal rapid injection device for LCD production, and relates to the technical field of LCD production. The top of a box body is movably connected with a box door, the side face of the box body is fixedly connected with a transparent plate, the side face of the box body is fixedly connected with an air pressure booster pump, and the side, close to the air pressure booster pump, of the box body is fixedly connected with an atmosphere inflation pipeline; one side, close to the air pressure booster pump, of the box body is fixedly connected with a vacuum pump, and when the air pressure of an inner cavity of the box body reaches 1kgf / cm consistent with the external atmospheric pressure, the valve on the atmosphere inflation pipeline is closed, the valve on the air pressure booster pump is opened, and the air pressure booster pump is started; the air pressure in the cavity of the box body is increased to be 2-10 kgf / cm through the air pressure booster pump, at the moment, the difference between the pressure in the cavity in the box body and the pressure in the empty liquid crystal box is higher, the pressure difference is approximately equal to the pressure in the cavity in the box body, and under the higher pressure difference, the liquid crystal injection speed is greatly increased by 10%-200%.

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 liquid crystal microlens array includes m1 first electrode bars and m2 second electrode bars. The orthographic projections of the second electrode bars on the liquid crystal layer intersect the orthographic projections of the first electrode bars on the liquid crystal layer respectively. The m1 first electrode bars are respectively fed with 1-n1 voltage signals, and the m2 second electrode bars are respectively fed with 1-n2 voltage signals. By controlling the voltage values of the voltage signals, the rotation angle of the liquid crystal molecules at this position in the liquid crystal cell can be changed to form an annular phase delay distribution, so as to form a curved microlens at each n1×n2 intersection point. The first electrode bars and the second electrode bars are in a strip structure, which is relatively simple to manufacture. By controlling the sizes of n1 and n2, the shape and size of the curved microlens can be controlled, and the regulation accuracy is relatively high. A driving method for the liquid crystal microlens array and a near-eye display system including the liquid crystal microlens array are also provided.

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.

Provided is an article which transitions from a first state to a second state in response to actinic radiation. The article includes an indolenaphthopyran, wherein in the first state the article exhibits a percent transmission of greater than 80 percent, and in the second state the article exhibits a percent transmission of between 35 and 75 percent, and a τSB value of less than 20 percent. The article can be a photochromic article selected from ophthalmic articles, display articles, windows, mirrors, active liquid crystal cell articles, and passive liquid crystal cell articles.

The present invention relates to the technical field of liquid crystal display screens, and specifically to a VA liquid crystal display screen, which includes a surface polarizer, a liquid crystal cell, and a bottom polarizer; the liquid crystal cell includes a surface ITO glass, an upper alignment film, a sealant edge, a liquid crystal layer, a lower alignment film, and a bottom ITO glass; the surface ITO glass and the bottom ITO glass are bonded by the sealant edge to form a closed space; the liquid crystal layer is arranged between the upper alignment film connected to the segmented electrode and the lower alignment film connected to the common electrode. By increasing the thickness of the liquid crystal layer and using a high-density friction cloth, the friction alignment ability is increased, and the reliability is improved. Since the cell thickness is increased, adjustments of liquid crystal and optical sheet compensation are required, and the best blackness effect is achieved at each non-selected state viewing angle. The VA liquid crystal display screen product with a newly designed combination of the present invention can achieve a better display effect and eliminate the problems of display black spots and haze.