16 results about "Liquid crystal devices" patented technology

This invention provides a liquid crystal device. The liquid crystal device includes one or more pixel elements, each pixel element including a first substrate, a second substrate, a liquid crystal layer between the first and second substrates, a first plurality of electrodes and a second plurality of electrodes formed between the first substrate and the liquid crystal layer, and a third plurality of electrodes and a fourth plurality of electrodes formed between the second substrate and the liquid crystal layer; wherein the electrodes of the first plurality of electrodes and the second plurality of electrodes are respectively electrically driven, the electrodes of the third plurality of electrodes and the fourth plurality of electrodes are respectively electrically driven, an in-plane electric field is formed between the first and second plurality of electrodes, and between the third and fourth plurality of electrodes, and an out-of-plane electric field is generated between the first electrode and the third or fourth electrode, and between the second electrode and the third or fourth electrode, and the in-plane electric field and the out-of-plane electric field form an electric field in an orthogonal direction.

The invention provides an optical display module and a head-mounted display device, the optical display module comprises a display assembly, and the display assembly is used for displaying an image; the refraction assembly is arranged on the surface of the light-emitting side of the display assembly, and the refraction assembly comprises a substrate and a refraction element arranged on the surface of the substrate; the reflection assembly is used for reflecting part of light rays emitted by the display assembly into human eyes; the adjusting assembly is used for adjusting the focal power of the optical display module, the refractive index of the refraction assembly is adjusted in an electric control mode by using the holographic lens with the light weight as the reflection assembly or using the liquid crystal device or the metasurface device, and therefore under the condition that the focal power of the optical display module can be adjusted, the focal power of the optical display module can be adjusted. And the weight and the size of the optical display module are reduced.

The application discloses a kind of liquid crystal device drive control method and liquid crystal drive controller, it is related to liquid crystal device technical field.Judgment is received amplitude specified value and whether the change of received amplitude specified value is generated in which method, and amplitude specified value is used to set the amplitude of liquid crystal drive signal for setting the liquid crystal device to drive;When amplitude specified value changes, the amplitude change amount between current received amplitude specified value and the amplitude specified value received at previous time and amplitude increasing or decreasing direction are determined, and signal adjustment duration and adjustment voltage are determined according to amplitude change amount and increasing or decreasing direction;In signal adjustment duration, the amplitude of liquid crystal drive signal sent to liquid crystal device is adjusted according to amplitude increasing or decreasing direction and amplitude change amount, and after signal adjustment duration ends, the liquid crystal drive signal of changed amplitude specified value is sent to liquid crystal device.The above scheme can improve the driving ability of liquid crystal device.

A liquid crystal device is provided having at least two opposing transparent substrates, at least one liquid crystal switching layer sandwiched between the opposing substrates. The liquid crystal layer contains one or more polymerized photoreactive mesogens of formula I,R11-Sp11-X11[-A-Z]o-A11-CY11—CY12[—C—O]x[—O]y-A[-Z-A]p-X21-Sp21-R21  Iwherein R11, R21, A11, A, Z, X11, X21, Y11, Y12, Sp11, Sp21, o, p, x and y are as defined herein, and one or more nematogenic compounds. An electrode structure is provided on one or both of the opposing substrates, and one or more of the substrates are additionally provided with an optical grating or a lens structure adjacent to the liquid crystal switching layer.

The invention discloses an apparatus comprising: a material having a switchable refractive index; an electrode array for inducing an electric field in the material having a switchable refractive index wherein the electrode array comprises one or more concentric shape sets, each concentric shape set comprising an array of concentric shape electrodes electrically connected in series; and an electrical conductor for activating the one or more concentric shape sets in parallel; the radial width and pitch of the concentrically shaped electrodes are substantially uniform across at least one of the set of concentric shapes.

A vehicle windscreen is proposed, comprising a windscreen body arrangement with at least one windscreen body and a liquid crystal arrangement comprising a liquid crystal layer (36), a first carrier film (28), and a second carrier film (30), wherein the liquid crystal layer (36) is arranged between the first carrier film (28) and the second carrier film (30), and the first carrier film (28) has a first electrode layer (32) on its side facing the liquid crystal layer (36), and the second carrier film (30) has a second electrode layer (34) on its side facing the liquid crystal layer (36), wherein the first carrier film (28) is free of the liquid crystal layer and the second carrier film in a surface area, and the first electrode layer (32) forms a contact zone in this surface area. An electrical connecting element (52) is electrically connected to the first electrode layer (32) in the region of the contact zone.On the side of the first carrier film (28) facing away from the liquid crystal layer (36) a conductor track (50-1, 50-2, 50-2, 50-4) is printed, which is electrically connected to the electrical connecting means (52) and leads to an electrical connection area (44) of the liquid crystal arrangement.

The application relates to a resolution improvement control method and device of a liquid crystal device and the liquid crystal device. The method comprises the following steps: S1, acquiring a high-resolution image to be displayed, and decomposing the high-resolution image to obtain a plurality of low-resolution images; S2, judging whether a current high-resolution image display period is a positive display period or a negative display period; S31, in the positive display period, controlling an array of display units to display the plurality of low-resolution images in a first order in time, and simultaneously controlling the direction of a galvanometer to offset the position of the plurality of low-resolution images; S32, in the negative display period, controlling the array of display units to display the plurality of low-resolution images in a second order in time, and simultaneously controlling the direction of the galvanometer to offset the position of the plurality of low-resolution images; and S4, returning to step S1 to acquire a new high-resolution image. The application changes the display order of the plurality of low-resolution images, thereby reducing the risk of image sticking and screen burning of the liquid crystal device when the resolution is improved.

Provided is a dichroic dye, which has a structure shown in the following formula 1 by design, formula 1: the molecular skeleton structure shown in formula 1 is long rod linear conjugation, can be oriented along an electric field in a liquid crystal, makes the dye molecules synchronous directional arrangement along with the arrangement orientation of the host liquid crystal molecules, and has a high dichromatic ratio; in addition, the dichroic dye has good low-temperature compatibility with liquid crystal molecules.

A camera module includes a liquid crystal panel that has an incident light control area, a lens, an imaging device that acquires information of light transmitted through the incident light control area and the lens, and a control circuit. The liquid crystal panel includes a first guest-host liquid crystal cell that has a black state and a transparent state, a second guest-host liquid crystal cell that has a black state and a transparent state, and a liquid crystal device that is provided between the first guest-host liquid crystal cell and the second guest-host liquid crystal cell and has the incident light control area. The control circuit sets the first guest-host liquid crystal cell and the second guest-host liquid crystal cell to the black state to use the first guest-host liquid crystal cell and the second guest-host liquid crystal cell as polarizing plates.

A liquid crystal device according to the present disclosure comprises: a plurality of data lines provided corresponding to columns of a plurality of pixels; a shift register unit for sequentially capturing video signals by the number of columns of the plurality of pixels; a latch unit for simultaneously outputting the plurality of captured video signals; a plurality of comparators for comparing each of the plurality of video signals with a gray-scale signal and activating a corresponding match signal when the video signal matches the gray-scale signal; a plurality of first switch elements that are provided between common wiring through which a ramp signal propagates and the plurality of data lines, that turn on at a timing when the potential of the ramp signal starts to change linearly, and turn off individually at a timing when the match signal of each of the plurality of comparators is activated; and a plurality of second switch elements that are provided between initialization wiring on a path different from the common wiring and the plurality of data lines, and initialize the potentials of the plurality of data lines.

To provide a liquid crystal device that can suppress the occurrence of liquid crystal unevenness. [Solution] The dimming device (10) comprises a first transparent substrate (11), a second transparent substrate (12), a dimming cell (20) disposed between the first transparent substrate (11) and the second transparent substrate (12), a first bonding layer (13) disposed between the first transparent substrate (11) and the dimming cell (20), and a second bonding layer (14) disposed between the second transparent substrate (12) and the dimming cell (20). The first bonding layer (13) and the second bonding layer (14) are bonding bodies containing non-pressure adhesive components. The first bonding layer (13) is OCR, and the second bonding layer (14) is OCA.

The utility model relates to optical super-structured surface technical field especially, and it is a kind of polarization-insensitive silicon-based liquid crystal device.The silicon-based liquid crystal device: first transparent electrode receives incident light and output polarization conversion and phase modulation light beam, and incident light includes polarization state orthogonal first polarization direction linearly polarized light and second polarization direction linearly polarized light;First layer liquid crystal cooperates first transparent electrode and carries out phase modulation to first polarization direction linearly polarized light;Second layer liquid crystal cooperates second transparent electrode and carries out phase modulation to first polarization direction linearly polarized light;Super-structured surface quarter-wave plate cooperates silica dielectric layer, metal reflection layer and converts first polarization direction linearly polarized light into second polarization direction linearly polarized light, and second polarization direction linearly polarized light is converted into first polarization direction linearly polarized light, to realize a kind of polarization-insensitive silicon-based liquid crystal technical scheme that can realize polarization conversion and can carry out phase modulation.

Embodiments of the present application provide a liquid crystal device, an optical modulation device and a system, which are applied in the fields of wavelength selective switch, laser radar, unmanned driving, laser display and the like. The liquid crystal device comprises a silicon-based backplane, a liquid crystal layer, a transparent cover plate, a super-structured surface structure and a cladding layer. The liquid crystal layer is located between the transparent cover plate and the cladding layer, the cladding layer is located between the super-structured surface structure and the liquid crystal layer, and the super-structured surface structure is located between the cladding layer and the silicon-based backplane. The device disclosed in the present application produces a pre-tilt angle by preparing a super-structured surface structure, and combines the modulation range of the liquid crystal layer of a traditional LCoS device to improve the overall beam angle scanning range, that is, to realize large-angle deflection of the liquid crystal device (for example, LCoS) while maintaining low insertion loss.

The application provides a spectral image sensor and system and a preparation method of a pixelated liquid crystal device, the spectral image sensor comprises: an image detection array and a spectral filter array, the image detection array and the spectral filter array are arranged in a stack, the spectral filter array comprises a pair of polarizers and a pixelated liquid crystal device arranged between the pair of polarizers, and liquid crystals in each pixel region of the pixelated liquid crystal device have a fixed out-of-plane rotation angle. The spectral image sensor and system and the preparation method of the pixelated liquid crystal device provided by the embodiment of the application have simple and stable pixelated liquid crystal device structures, and the cost of the spectral image sensor is reduced.

This invention discloses a liquid crystal composition composed of pyrrole-positive liquid crystals, comprising 1-80% by weight of general formula I pyrrole liquid crystals and 20%-99% by weight of general formula II liquid crystal compounds. The core of the general formula I pyrrole liquid crystal compound is a pyrrole group, which helps improve the dielectric anisotropy and response speed of the liquid crystal material. General formula II includes terminal olefin liquid crystal monomers with extremely low rotational viscosity, effectively reducing the viscosity of the liquid crystal composition and improving the response speed; it also includes polyfluorinated difluoromethoxy bridge liquid crystal monomers, which help enhance dielectric anisotropy and reduce the voltage required for liquid crystal formation; and it includes tetracyclic liquid crystal compositions, which improve the clearing point of the liquid crystal. The liquid crystal composition provides the required dielectric and optical properties, achieving high-definition clearing points above 120°C, which helps ensure the working performance of liquid crystal devices under high-temperature conditions. When applied to automotive LCOS reflective liquid crystal display devices, the response speed is improved to within 4ms.

The application discloses an electrically adjustable polymer stabilized cholesteric liquid crystal device and a preparation method thereof, relates to the technical field of polymer stabilized cholesteric liquid crystal, and the preparation method of the liquid crystal device is as follows: negative nematic liquid crystal, reactive chiral monomer, chiral agent, ultraviolet radical polymerizable monomer, thiol monomer, a photoinitiator and an ultraviolet absorber are uniformly mixed by heating and stirring, and then filled into a liquid crystal cell composed of two layers of conductive transparent ITO glass substrates; the liquid crystal cell is irradiated by ultraviolet light under an alternating current electric field to perform a polymerization reaction, a pitch gradient is formed; and a direct current electric field is applied to the sample after the polymerization reaction, the pitch gradient is further increased, and a reflection band gap is wider. The application solves the technical problems of a very narrow initial bandwidth, high haze and high working voltage of a traditional electrically adjustable PSCLC.