170 results about "Liquid crystal devices" patented technology

The invention relates to the technical field of liquid crystal devices, and particularly discloses a normally-on flexible liquid crystal dimming film and a preparation method thereof. The structure of the normally-on flexible liquid crystal dimming film sequentially comprises a first flexible transparent substrate, a first vertical alignment layer, a dye liquid crystal layer, a second vertical alignment layer and a second flexible transparent substrate from top to bottom, wherein the materials of the first vertical alignment layer and the second vertical alignment layer are selected from side chain type transparent polyimide materials; the dye liquid crystal layer comprises black dichroic dye and negative phase liquid crystal. By accurately controlling the orientation arrangement of liquid crystal molecules, a high-precision pretilt angle is realized, the light modulation amplitude in a visible light broadband range reaches 45% or above, and the photoelectric property is equivalent to that of a normally dark (forward) mode liquid crystal dimming film.

The embodiment of the invention provides a liquid crystal composition and application thereof. The liquid crystal composition comprises an additive and three compounds with specific structures, and the liquid crystal composition is high in birefringence, appropriate in clearing point, not prone to crystallization at low temperature, good in high-temperature-resistant stability and anti-ultraviolet stability and beneficial to application in liquid crystal devices.

An automated visual inspection (AVI) system may include at least one profile view imager having an optical axis that passes through an inspection object, a proximal polarizing film axially aligned with the optical axis, a liquid crystal device axially aligned with the optical axis, a distal polarizing film axially aligned with the optical axis, and at least one light source oriented to emit illumination toward the distal polarizing film. Alternatively, or additionally, an AVI system may include a profile view imager having an optical axis that enters a container through a side wall of the container, and a ring light that is coaxially aligned with a central axis of the container, below the container, and oriented to emit light toward a bottom of the container. The AVI system may also include a bottom imager coaxially aligned with the central axis and oriented to view the bottom of the container.

The invention discloses an automatic focusing system and a thickness measuring system suitable for a semitransparent wafer, and the automatic focusing system comprises the semitransparent wafer, an objective lens to be focused, a reflector, a laser light source, a first lens, a small-hole diaphragm, a programmable liquid crystal device, a collimating lens, a second lens, a third lens, a first detector, a second detector, and a motor. Accurate focusing of the objective lens is achieved through detection light spots of two detectors, and the thickness measuring system comprises a semitransparent wafer, a dispersion objective lens, a reflecting mirror, a white light source, an achromatic lens, a small-hole diaphragm, a programmable liquid crystal device, a collimating lens, a convergent lens, a slit, a lens and the detectors. According to the mapping relation between the transverse displacement on the detector and the thickness of the semitransparent wafer, the unknown thickness of the semitransparent wafer is measured, a spectrograph is not needed, and the cost is low.

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.

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.

This liquid crystal panel comprises a first substrate, a second substrate, a liquid crystal layer, and an electrode layer. An insulating layer is formed on the electrode layer of at least one substrate, from among the first substrate and the second substrate, provided with the electrode layer. The direction of the transmission axis of a first polarizing plate provided on the first substrate side and the direction of the transmission axis of a second polarizing plate provided on the second substrate side are perpendicular or parallel to each other. Light emitted from the light source passes through the second polarizing plate, the second substrate, the liquid crystal layer, and the first substrate, in this order, provided on the second substrate side. While the electrode layer is applying an electric field to the liquid crystal layer, the transmittance of the light emitted from the first polarizing plate is modulated to an impulse type between a low transmittance and a high transmittance.

To provide a sealing agent for a liquid crystal device which is excellent in storage stability, low temperature curability, insertion prevention, and low liquid crystal contamination.SOLUTION: A sealing agent for a liquid crystal device contains a curable resin, an acid anhydride, and a base generator, wherein the base generator generates a tertiary amine compound by heating or irradiation with active energy rays.SELECTED DRAWING: None

A liquid crystal device and an electronic apparatus. An impurity generated in a display area of the liquid crystal device is removed from the display area based on a polarity of the impurity. A liquid crystal device according to an embodiment includes: a common electrode to which a common potential is applied; a pixel electrode to which a signal potential is applied and which is disposed in the display region; a first electrode to which a first potential having positive polarity with respect to the common potential is applied, the first electrode being disposed outside the display region in plan view; a second electrode to which a second potential having a negative polarity with respect to the common potential is applied, the second electrode being disposed outside the display region in plan view; and a liquid crystal layer disposed between the pixel electrode and the common electrode, between the first electrode and the common electrode, and between the second electrode and the common electrode. In plan view, the first electrode has a first portion and a second portion having a longer distance from the display region than the first portion. The second electrode is disposed between the display region and the second portion in plan view.

The application relates to an exposure device based on a spatial phase modulator and a liquid crystal device, which comprises a light source control module, a light intensity and polarization control module, a focusing servo module, a sample setting module, a voltage control module and a monitoring module, the light source control module comprises a first switchable mirror and a light source switching assembly, the light intensity and polarization control module comprises a light intensity modulation assembly for receiving a light beam output by the light source control module and modulating the light intensity of each pixel point in the light beam, and a polarization modulation assembly for modulating the polarization state of each pixel point in the light beam emitted by the light intensity modulation assembly; the first switchable mirror is used for switching the light path between the light intensity modulation assembly and the polarization modulation assembly; the focusing servo module and the sample setting module are both switched to face the polarization modulation assembly or the first switchable mirror. Compared with the prior art, the exposure device has more degrees of freedom, the exposure process is simple and efficient, and the needs of experimental teaching and scientific research engineering can be met.

The invention provides a light guide plate fixing structure for reinforcing a liquid crystal display, and relates to the technical field of displayers, the light guide plate fixing structure comprises a light guide plate, one side of the light guide plate is provided with a first positioning protrusion, and the opposite side of the first positioning protrusion is provided with a second positioning protrusion; the limiting frame is provided with a positioning groove, the positioning groove corresponds to the first positioning bulge and the second positioning bulge, the limiting frame is provided with a placing step, the placing step corresponds to the light guide plate, and an expansion space is reserved between the placing step and the light guide plate; and the sealant is filled in an expansion space where the first positioning bulge and the second positioning bulge intersect with the placement step, plays a role in positioning and buffering, and is used for solving the problem that the existing light guide plate is extremely easy to deform due to high-temperature expansion when being used in an environment with a relatively large temperature difference. The optical film assembly is easily scratched, and the display effect of the military liquid crystal device is influenced.

A liquid crystal device according to the present disclosure comprises: a shift register unit that, in synchronization with a clock signal, sequentially captures video signals the number of which corresponds to the number of columns of a plurality of pixels; a latch unit that, in synchronization with a trigger signal, simultaneously outputs the plurality of video signals captured by the shift register unit; a plurality of comparators that, when each of the plurality of video signals outputted from the latch unit and a gradation signal are compared and match each other, activate respective match signals; an analog switch unit that supplies a plurality of analog voltages corresponding to timings at which the respective match signals of the plurality of comparators are activated to a plurality of data lines; and a failure detection circuit that captures the respective match signals of the plurality of comparators in synchronization with the trigger signal and outputs a failure detection result in synchronization with the clock signal.

Disclosed is an imaging system including an image sensor with a plurality of photo-sensitive cells arranged on a photo-sensitive surface of the image sensor; a light valve device with an array of light valves, wherein the array of light valves is arranged on an optical path of the photo-sensitive surface of the image sensor; and at least one processor configured to: control an exposure of photo-sensitive cells of at least a first region in the photo-sensitive surface by utilising respective light valves of said array; read out image data from the photo-sensitive cells of the image sensor; and process the image data to generate an image.

The present invention relates to an automatic detection device, which includes a support module (1), a detection platform module (2) supported on the support module (1), and a line scan module (3) located on one side of the detection platform module (2). The device further includes: a PCB board positioning module (4) located above the line scan module (3); a detection shaft (5) arranged in parallel with the PCB board positioning module; a silver paste detection module (6) slidably mounted on the detection shaft (5); and a PCB board detection module (7) slidably mounted on the detection shaft (5) in parallel with the silver paste detection module (6). The automatic detection device of the present invention can simultaneously detect the number of conductive particles of a liquid crystal panel, the pressing device and the liquid crystal panel, the silver paste coating condition of the liquid crystal panel, and the pressing state of the PCB board, improving the detection efficiency and accuracy. In addition, the automatic detection device of the present invention can be embedded in the assembly line of liquid crystal devices, retaining the original product production line.

To provide a liquid crystal alignment film capable of forming a liquid crystal display element having favorable afterimage characteristics and excellent display quality, and liquid crystal alignment agent for alignment.SOLUTION: There are provided a liquid crystal alignment agent and liquid crystal alignment film, and a liquid crystal element using the same. The liquid crystal alignment agent contains a polymer (K) which is at least one polymer selected from a group consisting of a polyamic acid, a polyamic acid ester and a polyimide, where a raw material composition of the polymer (K) contains at least one tetracarboxylic acid derivative represented by formula (I) and at least one diamine having a specific structure.SELECTED DRAWING: None

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 liquid crystal device (400) is provided comprising: a liquid crystal layer having a thickness and comprising: a liquid crystal material; and a plurality of polymer structures (414a, 414b) comprising polymerised liquid crystal material. Each polymer structure (414a, 414b) is located at a different depth in the thickness of the liquid crystal layer. Electrodes are provided configured to apply an electric field to the liquid crystal layer. Each polymer structure (414a, 414b) has a different selected locked-in liquid crystal state.

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 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 invention provides a method for manufacturing a liquid crystal alignment film, a method for repairing defects of the liquid crystal alignment film, a method for manufacturing a liquid crystal device, and a photo-alignment agent for repairing, which can simply and accurately repair defects in the liquid crystal alignment film and can obtain a liquid crystal device with fully suppressed display defects. A liquid crystal alignment film is manufactured by a method including: a film forming step of forming a liquid crystal alignment film by applying a liquid crystal alignment agent on a substrate; a detection step for detecting defects existing in the liquid crystal alignment film; a coating step in which, when the defect is detected in the detection step, a region including the defect in the liquid crystal alignment film is partially coated with a light alignment agent for repair; and an irradiation step for irradiating a region including the application site of the repair photo-alignment agent with radiation.

According to one embodiment, each of a first liquid crystal to a fourth liquid crystal cell includes a first strip electrode, a second strip electrode, a third strip electrode, and a fourth strip electrode, the first strip electrode to the fourth strip electrode of the first liquid crystal cell and the first strip electrode to the fourth strip electrode of the third liquid crystal cell have a first shape, and the first strip electrode to the fourth strip electrode of the second liquid crystal cell and the first strip electrode to the fourth strip electrode of the fourth liquid crystal cell have a second shape that is different from the first shape.

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 includes: a first electrode; a second electrode; a liquid crystal layer; and a measurement circuit configured to supply a potential to the first electrode and the second electrode and measure a first electrode potential, wherein the measurement circuit supplies a potential to the first electrode and the second electrode so that a potential difference between the first electrode and the second electrode becomes a first potential difference during a first period, supplies a potential to the first electrode and the second electrode so that the potential difference becomes a second potential difference having a polarity different from that of the first potential difference during a second period after the first period, and stops supplying the potential to the first electrode and supplies the same potential as during the second period to the second electrode during a third period after the second period.

The present invention relates to the technical field of liquid crystal device preparation, and in particular to a preparation method for a self-assembled vertical alignment film, comprising: preparation of self-assembly solutions: dissolving poly(diallyldimethylammonium chloride) in deionized water to prepare a self-assembly solution A with a concentration of 0.5-10%, and dissolving long-chain alkyl sodium sulfonate in deionized water to prepare a self-assembly solution B with a concentration of 0.02-0.2 mg / mL; cleaning a substrate, and immersing same in the self-assembly solution A for 20-30 h; taking out the substrate, washing with deionized water, and blow-drying with high-purity nitrogen; then immersing the substrate in the self-assembly solution B for 5-100 min; taking out the substrate, washing with deionized water, and blow-drying with high-purity nitrogen; and when a film is prepared, carrying out surface alignment by using a rubbing method, to obtain the self-assembled vertical alignment film. The present invention has the advantages that a self-assembled film can be formed by immersing, in self-assembly solutions, a substrate modified with specific chemical materials, the preparation method is simple, and the stability is good.

This invention relates to a liquid crystal electrically controlled reflector capable of breaking the reflectivity limit, comprising, from front to back, a first liquid crystal device, a second liquid crystal device, a first reflective polarizer, and a second reflective polarizer. The main body of the first liquid crystal device is a first liquid crystal cell sandwiched with a first liquid crystal layer. The first liquid crystal layer is composed of negative liquid crystal doped with dichroic dyes. In its natural state, the negative liquid crystal molecules and the dichroic dye molecules are perpendicularly aligned, while in the driven state, the negative liquid crystal molecules drive the dichroic dye molecules to deflect along a second axis. The second liquid crystal device has a 90° optical rotation function in its natural state, but no optical rotation function in the driven state. This invention not only achieves efficient reflection of two beams of orthogonally polarized states simultaneously in its high-reflectivity operating mode, significantly improving the overall reflectivity, but also reduces the reflectivity to a minimum level in its low-reflectivity operating mode.

The present application relates to a kind of liquid crystal electrically controlled mirrors, including the absorption polarizer, first liquid crystal device, first reflective polarizer, second liquid crystal device, second reflective polarizer arranged in order from front to back;Define first axial, second axial as two axial parallel to mirror surface and mutually orthogonal, absorption polarizer has first transmittance T1 to first axial polarized light, and second transmittance T2 to second axial polarized light, T2 <T1;First liquid crystal device, second liquid crystal device have 90 ° optical rotation function in natural state, and no optical rotation function in the state of applying driving voltage;First reflective polarizer, second reflective polarizer can transmit first axial polarized light and reflect second axial polarized light.This kind of liquid crystal electrically controlled mirror not only can have higher reflectivity in high reflection state operating mode, but also can improve overall transmittance in its low reflection state operating mode.

A display apparatus includes a data generation circuit, a source driver circuit, and a pixel. The source driver circuit is electrically connected to the pixel through first and second wirings. The pixel includes a display device that is a liquid crystal device, a potential of one electrode of the display device can be a potential of the first wiring, and a potential of the other electrode of the display device can be a potential of the second wiring. The image data generation circuit has a function of generating digital image data including first and second data. One of the first and second wirings is made to have a potential corresponding to first data, and the other of the first and second wirings is made to have a potential corresponding to the second data. The potential of the first wiring and the potential of the second wiring are interchanged.

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 a ferroelectric nematic phase liquid crystal device based on array electrode regulation and control and an electric field orientation method. The device comprises an upper glass substrate, an upper grid electrode, a ferroelectric nematic phase liquid crystal layer, a lower grid electrode and a lower glass substrate which are sequentially arranged in a laminated mode. By calculating the projection of the expected electric field direction in the cell thickness direction and based on the geometric position relation of the electrodes in the plane, the magnitude of the electric potential which should be applied to each electrode is calculated, electric field distribution with specific directions and angles is formed in the liquid crystal layer, ferroelectric nematic phase liquid crystal molecules are guided to generate directional arrangement in the electric field direction, and the liquid crystal display effect is improved. The controllable inclination of a molecule director is realized, the characteristics of high sensitivity and quick response of ferroelectric nematic liquid crystal to the electric field direction are fully utilized, the active regulation and control of the orientation state of liquid crystal molecules in a three-dimensional space are realized by accurately designing the potential gradient, and the ferroelectric nematic liquid crystal can be widely applied to the scenes of spatial light modulators, electro-optical scanning devices, phase regulators and the like.

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.