146 results about "Polymeric liquid crystal" patented technology

The present invention relates to a marking of polymeric liquid crystal material having determined optical characteristics allowing its authentication and reading by a machine and its authentication by the human eye. The marking is applied onto an item, good or article by a variable information printing process. The marking is in the form of indicia representing a unique code which allows for an easy authentication by the human eye and a secure tracking and tracing of the marked item, good or article throughout its life cycle.

A device (100, 140, 150) for differentially absorbing light, depending on the state of linear polarization of the light, is disclosed. This polarizing effect is induced and controllable by the level of ambient light impinging on the device. The device (100, 140) may be used as an anti-glare vision protection device which selectively absorbs specularly reflected sunlight in brightly lit environments while permitting all light to pass in dimly lit environments. The device (100) includes a carrying medium which may be a film (142) or opposed substrates (112) that are sealed. A film or the opposed substrates carry a mixture (120) of fluid material (124) and photochromic dyestuffs (122), wherein the photochromic material is activated upon the detection of ultraviolet light so as to absorb some of the light and wherein the energization of the photochromic material effects the material so as to simultaneously selectively absorb the specularly reflected sunlight. The material (124) may be any fluid that dissolves the photochromic dyestuff material (122). The fluid is preferably a liquid crystal material such as nematic or chiral nematic. Alternatively, the material (124) may be a polymer liquid crystal. The device (150) may allow for electrical control of the absorptive properties.

The present invention relates to a marking of polymeric liquid crystal material having determined optical characteristics allowing its authentication and reading by a machine and its authentication by the human eye. The marking is applied onto an item, good or article by a variable information printing process. The marking is in the form of indicia representing a unique code which allows for an easy authentication by the human eye and a secure tracking and tracing of the marked item, good or article throughout is life cycle.

A composite of an organic monomer compound and an organic or inorganic salt, wherein the organic monomer compound comprises an ion-complexing moiety, a mesogen moiety that expresses a liquid crystalline phase and a polymerizable moiety in its molecular structure, is polymerized at the polymerizable moiety of the organic monomer compound, thereby forming an anisotropic ion-conductive polymeric liquid crystalline composite as a novel material having high ion conductivity characteristic of polymeric electrolytes, anisotropy due to orientation of a liquid crystal, and self-supporting properties characteristic of polymeric compounds.

The invention discloses an electric control dimming film, which comprises an upper electrode layer, a polymer dispersion liquid crystal layer, an electrochromic layer and a lower electrode layer from top to bottom, wherein the electric control dimming film simultaneously comprises the polymer dispersion liquid crystal layer and the electrochromic layer. Compared with the prior art adopting a measure of adding dye into the polymer dispersion liquid crystal layer, the electric control dimming film has the advantages that the polymer dispersion liquid crystal layer and the electrochromic layer are respectively adopted, and the problems of too high driving voltage and too low on-state transmission rate due to dye introduction into the polymer dispersion liquid crystal layer can be solved. Meanwhile, the electrochromic layer is applied to the electric control dimming film, the stable and invertible color change can occur under the effect of an extra electric field, and the electric control dimming film can show the colored and transparent invertible change on the appearance. On the basis of the special color change mechanisms of the electrochromic layer, the electric control dimming film provided by the invention realizes the true sense of electric control color change.

Process comprising the following steps: (a) preparation of liposomes (bilayers) by extrusion from lipids, such as dimiristoylphosphatidylcholine; (b) preparation of polymers (-) PTOBEE (C26H20O8)n, both being liquid crystals of the cholesteric type; ( ) addition of the polymers to the suspension of liposomes. These systems have biomedical and pharmacologic applications such as "stealth liposomes', or "ghost liposomes', for the encapsulation of drugs with, as a result, an extension of their average life in the blood flow."

The invention discloses polymer and liquid crystal composition and liquid crystal handwriting display device using the same. The polymer and liquid crystal composition comprises a polymer and a liquid crystal which are mutually soluble, wherein the polymer comprises 30-70 parts of an oligomer monomer, 0.5-3 parts of a photoinitiator, 30-70 parts of an oligomer, 0.1-1 part of an adhesion promoter and 5-50 parts of a diluent. The invention further discloses a preparation method of the liquid crystal handwriting display device. The liquid crystal handwriting display device adopting the polymer and the bi-stable cholesteric liquid crystal has high display contrast, low driving voltage and sensitivity in handwriting, furthermore, electricity is not consumed in a handwriting displaying process and is only consumed at a refresh moment, handwriting refresh can be performed for millions of times, and the handwriting display device is environment-friendly.

A process for producing an optical element which comprises a polymeric liquid crystal layer having a helically twisted molecular structure and has satisfactory thickness precision and satisfactory optical properties. The process comprises applying a mixed solution containing a polymerizable nematic liquid crystal compound and a polymerizable chiral reagent to an oriented substrate, followed by drying, to orient the liquid crystal compound; and irradiating the mixed solution applied with radiation from the oriented substrate side while maintaining the mixed solution in contact with a gas comprising oxygen to thereby polymerize and cure the mixed solution.

The present invention provides a polymer-dispersed liquid crystal device which has excellent binding performance with a film substrate, can sustain white turbidance in being bended and can be driven with a low voltage, and a liquid crystal composition used for the polymer-dispersed liquid crystal device. The liquid crystal composition for polymer-dispersed liquid crystal device according to the invention contains the following components: at least one compound represented by a general formula (I-1) as a first component; at least one polymer compound selected from a compound represented by a general formula (II-1), multifunctional(methyl) acrylate compound and (methyl)methacrylate low polymer as a second component; and at least one non-polymeric liquid crystal compound as a third component, and at least one photopolymerization initiator as a fourth component. The invention also provides a light adjusting film which uses the liquid crystal composition for the polymer-dispersed liquid crystal device, and light adjusting glass with the light adjusting film which is clamped by two glass substrates.

A segmented, rigid-rod aromatic polyimide mixed with a UV curable acrylate photopolymer material comprises an alignment layer for aligning nematic polymeric liquid crystal compensator films. The material may also provide an out-of-plane retardation. The segmented, rigid-rod aromatic polyimide-based UV curable acrylate alignment layer, when applied in appropriate thickness, functions as a negative uniaxial C-plate compensator and causes alignment of the nematic liquid crystal molecules. The combination of the retardation provided by the alignment layer and the compensator film deposited on it provides a significant improvement in the contrast and color stability of liquid crystal displays (LCDs) at large viewing angles.

A liquid crystal composition for forming a polymer/liquid crystal composite in which disorder of an orientation state is reduced is provided. The liquid crystal composition includes a liquid crystal material exhibiting a blue phase and a liquid crystalline monomer represented by the following general formula (G1). Note that the liquid crystal composition may include a non-liquid-crystalline monomer and a polymerization initiator. In the general formula (G1), X represents a mesogenic skeleton; and Y₁ and Y₂ individually represent an alkylene group having a sum of carbon atoms and/or oxygen atoms of 1 to 20. Also in the general formula (G1), the alkylene group and the alkyl group may include a carbonyl group and may have an ether bond. In addition, the carbonyl group and the ether bond may form an ester structure. In the general formula (G1), Z₁ and Z₂ individually represent an acryloyl group or a methacryloyl group.

The invention discloses a cholesteric liquid crystal and a reflective-type circular polarization sheet thereof, and a manufacturing method. In the invention, a base material is coated with a guiding layer and the cholesteric liquid crystal. Under an effect of an intermolecular hydrogen bond, a hydrogen bond acceptor is migrated to an interface of the guiding layer and the cholesteric liquid crystal so as to generate a concentration gradient of a chiral molecule. Through polymerization, a thread pitch gradient is fixed so as to realize wide wave reflection of the reflective-type circular polarization sheet. By using the manufacturing method in the invention, a traditional liquid crystal orientation technology is omitted; through forming the hydrogen bond, efficiency of realizing the thread pitch gradient is increased; the thread pitch gradient is realized without slow polymerization, which is good for realizing industrialization and scalization. In the invention, a polymerizable monomer material is preferably used; through the polymerization, a crosslinking polymer network is formed; and good thermal mechanical stability and good weather resistance are possessed; by using the manufacturing method in the invention, through repeated multilayer coating, a selection reflection bandwidth of the cholesteric liquid crystal can be greatly widened and a circular polarization sheet of ultra wide wave reflection can be manufactured.

A phase plate having a reduced size and a reduced weight and having accurately parted regions while it has the same function as a conventional two-parted optical rotation plate and an optical data recording/reproducing device capable of stably recording and reproducing are presented.

A phase plate P1 comprising a polymer liquid crystal film 2 held between transparent substrates 1, 4, wherein the polymer liquid crystal film 2 is parted spatially in the region into which an incident light enters, so that the light transmitting the phase plate assumes a different state of polarization depending on an aligning direction of the molecules of the polymer liquid crystal film 2. The phase plate is located as a two-parted optical rotation plate in an optical data recording/reproducing device.

The invention discloses a lateral entry type field order liquid crystal displayer and a liquid crystal display device. The lateral entry type field order liquid crystal displayer comprises a display panel and a backlight source. The display panel comprises an upper substrate, a lower substrate and a polymer liquid crystal; one of the first substrate and the second substrate is a light guiding plate; the backlight source is arranged on the side edge of the light guiding plate, comprises a plurality of sub light sources of different light emitting colors and is used for emitting out incident light alternately in a field order mode to be emitted into the light guiding plate at a set angle; when the polymer liquid crystal is in a transparent state, the incident light is totally reflected on the first side face; or the polymer liquid crystal is in a scattering state, and the incident light is scattered on the second side face so that the incident light is transmitted out from the first sideface. In this way, the transmitting rate of the liquid crystal display panel can be increased, and meanwhile the power of the liquid crystal display can be lowered.

Projection systems having o-plate compensation elements are described. The compensation elements may be negative, positive or biaxial anisotropic element and may have a homogeneous tilt or a splayed tilt. The compensation elements may be formed from a polymer liquid crystal. The compensation elements are designed to maximize azimuth-averaged contrast. The compensation elements may be placed on the same side of a liquid crystal panel when a micro-lens array is used to improve the ease of manufacture.

A process for fabricating passive plastic displays, comprising the steps of: adopting a roll-to-roll coating machine for fabricating a bottom substrate having a fist patterned conducting line, fabricating a top substrate having a second patterned conducting line and an active area of polymeric liquid crystal on the surface of the top substrate by means of a roll-to-roll coating machine, and sealing the top and the bottom substrates by means of a roll-to-roll coating machine to form a plurality of display panels. Due to the continuous fabrication of the present invention with the low-cost apparatuses, applications of the plastic displays in the low-end products can be accelerated.

The invention provides a liquid crystal composition, polymer dispersion liquid crystals, a display panel and a preparation method, belongs to the technical field of display and can solve the problems that an existing polymer liquid crystal membrane can only achieve two states, namely the transparent state or the non-transparent state, and cannot present color. The liquid crystal composition comprises a twisted grain boundary phase liquid crystal system with a wide temperature range, two or more types of polymerizable monomers different in polymerization rate and nano particles; due to the fact that the different polymerizable monomers are different in polymerization rate, the polymer dispersion liquid crystals formed by the polymerizable monomers have polymer networks which are distributed in a gradient mode. When the liquid crystal composition is added to a liquid crystal cell for display, under the condition that voltage is applied, the colored frame state or transparent/non-transparent state can be presented. The display panel is wide in raw material source, low in cost, simple in preparation method and suitable for various display devices.

The invention discloses a display device, whichcomprises a first substrate and a second substrate arranged under the first substrate. The second substrate is further provided with a common electrode on the side facing the first substrate, each of first pixel units is provided with a pixel electrode and a first thin film transistor, the pixel electrode is electrically connected to a first scan lineand a data line adjacent to the first thin film transistor through the first thin film transistor, a third substrate and a polymer liquid crystal layer located between the second substrate and the third substrate are arranged under the second substrate, the third substrate is provided with a first electrode on the side facing the polymer liquid crystal layer, and the electric field in the polymerliquid crystal layer in a region corresponding to each of the first pixel units is separately controlled so that the polymer liquid crystal layer and the region corresponding to each of the first pixel units are individually switchable between a transparent state and a hazy state; and light leakage of the display device in a dark state can be reduced, and contrast is increased.

A circuit board capable of indicating the temperature of hot elements thereon is disclosed. The circuit board includes a substrate, a hot element and a thermochromic material. The hot element may be a chip set or a CPU. The thermochromic material may be inorganic thermochromic materials, or organic thermochromic materials, such as polymers, liquid crystals, dyes, or combinations thereof.

The invention provides tetracarboxylic dianhydride containing triazole, a polymer, a liquid crystal aligning agent, a liquid crystal aligning membrane, and a display element. The tetracarboxylic dianhydride is represented by the formula (1); wherein in the formula (1), the X represents a divalent organic group containing at least one triazole ring, the R1 and R2 individually represent one of trivalent groups, which are represented in the description; and at least one hydrogen atom of these groups can be replaced by a methyl group, an ethyl group, or a phenyl group. The liquid crystal aligning agent can form a liquid crystal aligning membrane that is hard to peel off or eliminate.

The invention relates to a method and device for vehicle intelligent anti-dazzle treatment. The device comprises an intelligent headlamp, intelligent front windshields/intelligent back windshields andthe like. The intelligent headlamp is characterized in that a TFT array drives polymer liquid crystal glass to conduct pixel-grade light shielding, and it can be achieved that high beams do not illuminate passers-by and vehicles in front. The intelligent front windshields can stop the high beams illuminated from the front and prevent dazzling; the intelligent rear windshields stop the high beamsilluminated from the back and make driving a little more comfortable. The device mainly comprises a deep camera module of front vision, and the deep camera module of the front vision is used for observing the passers-by and the vehicles in front; the vehicle is internally provided with a deep camera module for back vision, and the deep camera module for the back vision is used for observing pupilsof a driver; the device comprises the front windshields/back windshields made of polymer liquid crystal and driven by the TFT array, light can be shielded in a pixel-grade grey scale, and the transparency larger than or equal to 75%, as is required by a vehicle safety technical standard, can be satisfied.

The invention discloses a display panel and a display device. The display panel comprises a first dimming box and a display liquid crystal box. The first dimming box comprises a first substrate, a second substrate and a first selective polarization layer located between the first substrate and the second substrate. The polarization direction of the first selective polarization layer can be selectively changed, a refraction layer and a polymer liquid crystal layer are arranged on the first substrate; a groove for accommodating the polymer liquid crystal layer is formed in the refraction layer;the long axis of liquid crystal molecules in the polymer liquid crystal layer is parallel to the first substrate and the second substrate, the polarization direction of the first selective polarization layer is parallel to the long axis of the liquid crystal molecules in the polymer liquid crystal layer at a wide viewing angle, and at the moment, the refractive index of the polymer liquid crystallayer is larger than that of the refraction layer and has a light scattering effect. At a narrow viewing angle, the polarization direction of the first selective polarization layer is parallel to theshort axis of liquid crystal molecules in the polymer liquid crystal layer, and the refractive index of the polymer liquid crystal layer is smaller than or equal to the refractive index of the refraction layer.