237 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 present disclosure relates to a liquid crystal device. The device comprises a first portion and a second portion, each portion comprising a respective substrate, and a liquid crystal layer arranged in between the first portion and the second portion, wherein said liquid crystal layer comprises a mixture of a non-polar nematic liquid crystal and at least one ferroelectric nematic liquid crystal dopant, wherein the ferroelectric nematic liquid crystal dopant is provided as phase-separated nano-sized domains surrounded by the non-polar nematic liquid crystal molecules, said liquid crystal layer having a polar nematic phase characterized by ferroelectric polarization, and flexoelectric polarization, wherein the sum of said ferroelectric polarization and flexoelectric polarization has a magnitude larger than the magnitude of said ferroelectric polarization and said flexoelectric polarization taken separately, and wherein at least one of the respective substrates, on an inner surface thereof facing the liquid crystal layer, is provided with an electrode pattern for generating an electric field within the liquid crystal layer, wherein the electric field is configured to couple with the flexoelectric polarization and the ferroelectric polarization of the liquid crystal layer to perform switching of said liquid crystal layer.

A vehicle windscreen comprises a liquid crystal arrangement consisting of a liquid crystal layer, a first carrier film, and a second carrier film. The first carrier film has a first electrode layer. The second carrier film has a second electrode layer. In a first surface area, the first carrier film is free of the liquid crystal layer and the second carrier film, forming a first contact area with the first electrode layer. In a second surface area, the second carrier film is free of the liquid crystal layer and the first carrier film, forming a second contact area with the second electrode layer. The first electrode layer is provided with an electrical contact element in the first contact area. The second electrode layer is provided with an electrical contact element in the second contact area.The second carrier film has a hole in the second contact area, which is penetrated by an electrical connecting material that is in contact with the second contact element.

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.

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.

This photosensitive composition contains: a polymer derived from a monomer having a C1-C3 halogenated alkyl group containing at least one hydrogen atom, and including a structural unit (a1) having a hydroxyl group; and a photosensitive compound.

A vehicle pane includes a liquid crystal arrangement having a liquid crystal layer and first and second carrier films having, respectively, first and second electrode layers. In a first panel section, the first carrier film is free of the liquid crystal layer and the second carrier film, the first carrier film forming a first contact area with the first electrode layer. In a second panel section, the second carrier film is free of the liquid crystal layer and the first carrier film, the second carrier film forming a second contact area with the second electrode layer. The first and second electrode layers are respectively equipped with an electric contact element in the first contact area and in the second contact area. The second carrier film has a hole in the second contact area, an electric connective material passing through the hole and being in contact with the second contact element.

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.

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.

A liquid crystal device 1 comprises a liquid crystal cell 2 and heating means 3, wherein the liquid crystal cell comprises a first substrate 4 and a second substrate 5 facing each other and a liquid c

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.

A vehicle pane includes a liquid crystal device having a liquid crystal layer, a first carrier film, and a second carrier film. The first carrier film has a first electrode layer. The second carrier film has a second electrode layer. In the first panel section, the first carrier film is not provided with the liquid crystal layer and the second carrier film, and the first carrier film forms a first contact area with the first electrode layer. In the second panel section, the second carrier film is not provided with the liquid crystal layer and the first carrier film, and the second carrier film forms a second contact area with the second electrode layer. The first electrode layer is equipped with an electrical contact element in the first contact region. The second electrode region is equipped with an electrical contact element in the second contact region. The second carrier film has a hole in the second contact region, through which the electrical connection material passes and is in contact with the second contact element.

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.