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401 results about "Dichroic dye" patented technology
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Currently dichroic dyes are used in switchable windows and in some special purpose displays and consumer novelty goods. 'Exemplary synthesis of one dichroic dye :' US4695131 (Patent now expired, all words in the patent are now public domain and available for use worldwide without restriction.)
Transmissive or reflective liquid crystal display and novel process for its manufacture
InactiveUS20020126249A1Improve contrast ratioImprove color saturationLiquid crystal compositionsNon-linear opticsCrystallographyLiquid-crystal display
This invention relates to liquid crystal (LC) displays comprising cells of well-defined shape, size and aspect ratio which cells are filled with a liquid crystal composition preferably containing dichroic dye(s), and novel processes for their manufacture.
Owner:E INK CALIFORNIA
Liquid crystal mixture with low negative dielectric
ActiveCN101698802ALow negative dielectric anisotropyReduce the driving voltageLiquid crystal compositionsSolubilityDisplay contrast
The invention relates to a liquid crystal mixture for a display, which comprises the following compounds in percentage by weight: 70 to 90 percent of compound in a general formula I, 0 to 20 percent of compound in a general formula II, 5 to 25 percent of compound in a general formula III, 0 to 10 percent of compound in a general formula IV and 1 to 15 percent of compound in a formula V. Through optimal combination and optical proportioning, the anisotropyenergy of the negative dielectric of the liquid crystal mixture reaches -9.5, a clearing point is between 95 and 110DEG C, the driving voltage is very low, the energy consumption can be effectively reduced, and a liquid crystal display (hereinafter referred to as LCD) powered by a battery is powered more durably. The mixture has good intersolubility between monomers, and the solubility of the mixture for dichroic dyes is good; and various single dichroic dyes with different colors can be added to the liquid crystal mixture, so the liquid crystal mixture has good absorbance and dichroic ratio to well realize darker dark state and greatly improve display contrast in the displaying process.
Owner:JIANGSU HECHENG DISPLAY TECHCO
Light polarizing film with melanin
A dichroic dye can be blended with a non-dichroic dye (melanin and melanin derivatives) and still maintain a commercially acceptable level of polarizing efficiency. Efficient polarizers exhibit polarizing efficiencies of greater or equal to 95% and the best are even greater than or equal to 98%. Since melanin has unique features with respect to absorption of wavelengths of light, melanin is very useful to have in combination with a polarizer that takes advantage of this absorption. The blending can be done by a mixture (preferably an aqueous mixture) of melanin and a dichroic dye in a ratio sufficient to achieve the desired color and polarizing effect.
Owner:HOYA OPTICAL LABS OF AMERICA INC
Light source device, display device, terminal device, and transparent/scattering state switching element
ActiveUS20070268427A1Change colorAvoid changePlanar/plate-like light guidesNon-linear opticsDisplay deviceTerminal equipment
A light source device has a transparent / scattering state switching element for switching the range of irradiation angles, and liquid crystal molecules and dichroic dye molecules are dispersed in a polymer matrix in the PDLC layer of the transparent / scattering state switching element. The range of irradiation angles can thereby be switched, and the color can be prevented from changing when the radiation angle is switched.
Owner:BEIHAI HKC OPTOELECTRONICS TECH CO LTD
Transmissive or reflective liquid crystal display and process for its manufacture
InactiveUS7095477B2Absence of hysteresisReduce scatterLiquid crystal compositionsNon-linear opticsCrystallographyLiquid-crystal display
This invention relates to liquid crystal (LC) displays comprising cells of well-defined shape, size and aspect ratio which cells are filled with a liquid crystal composition preferably containing dichroic dye(s), and novel processes for their manufacture.
Owner:E INK CALIFORNIA
Polarizing optical element comprising a polarizing film and method for manufacturing such element
ActiveUS20070195422A1Easy to implementSmall thicknessOptical articlesPolarising elementsEngineeringDichroic dye
A polarizing optical element comprises a transparent optical base element and a layered structure that incorporates a polarizing film. The polarizing film is of the dichroic dye type and is oriented uniaxially. The layered structure is bonded to the optical base element by means of a layered structure that includes at least one layer of a pressure-sensitive adhesive. Thanks to the use of pressure-sensitive adhesive, the polarizing film during the bonding operation maintains a high polarization efficiency and an optical quality compatible with many applications of the optical element, especially ophthalmic applications.
Owner:ESSILOR INT CIE GEN DOPTIQUE
Light modulating material
The invention provides a light modulating material capable of supplying a predetermined light modulating property over a long period of time regardless of an incident light condition. The light modulating material includes at least: a first liquid crystal layer which has at least a dichroic dye and changes from a colorless transparency state to a colored transparency state when voltage is applied thereto; and a second liquid crystal layer which changes from a colorless transparency state to a white light-scattering state when voltage is applied thereto. The second liquid crystal layer is provided closer to a surface of the light modulating material on which light is incident compared to the first liquid crystal layer.
Owner:FUJIFILM CORP
Liquid-crystal composition and liquid-crystal display element
InactiveUS6033598ABetter dichroismLiquid crystal compositionsPolycyclic compoundLiquid-crystal display
PCT No. PCT / JP96 / 03300 Sec. 371 Date Jul. 10, 1997 Sec. 102(e) Date Jul. 10, 1997 PCT Filed Nov. 11, 1996 PCT Pub. No. WO97 / 17415 PCT Pub. Date May 15, 1997The present invention provides a guest-host liquid-crystal composition comprising a host liquid-crystal composition containing one or more dichroic dyes, characterized in that the host liquid-crystal composition comprises as the main component a polycyclic compound having three or more rings and having no cyano group in the direction of the molecular axis, the proportion of the polycyclic compound component having three or more rings in the host liquid-crystal composition being 75% by mole or higher, and that the guest-host liquid-crystal composition has an order parameter (S value) of 0.76 or higher. The invention further provides a liquid-crystal display element employing the composition. This guest-host liquid-crystal composition shows excellent dichroism or a high order parameter.
Owner:MITSUBISHI CHEM CORP
Photocurable adhesive agent, polarizing plate using the photocurable adhesive agent, method for production of the polarizing plate, optical member, and liquid crystal display device
ActiveCN101636672AImprove reliabilityPrevent discolorationNon-macromolecular adhesive additivesFilm/foil adhesivesEpoxyTectorial membrane
The invention provides a photocurable adhesive agent which has excellent storage stability, can prevent the discoloration of the adhesive agent itself or a material to be adhered during curing, has a high curing rate, and can provide good adhesion; a polarizing plate using the photocurable adhesive agent; a method for producing the polarizing plate; an optical member; and a liquid crystal displaydevice. Specifically, the invention discloses a photocurable adhesive agent for adhering a protective film to a polarizer comprising a polyvinyl alcohol resin film having iodine or a dichroic dye adsorbed and oriented thereon. The photocurable adhesive agent comprises: 100 parts by mass of an epoxy resin (A) having two or more epoxy groups in the molecule, wherein at least one of the epoxy groupsis an alicyclic epoxy group; 5 to 1000 parts by mass of an epoxy resin (B) having two or more epoxy groups in the molecule and containing substantially no alicyclic epoxy group; and 0.5 to 20 parts by mass of a photo-cationic polymerization initiator (C).
Owner:SUMITOMO CHEM CO LTD +1
Method and apparatus for forming sunglass lenses with a predetermined gradient
InactiveUS20150253465A1Accurate locationCharacteristic is differentLamination ancillary operationsLaminationEngineeringSolar mirror
A method for forming sunglass lenses with a predetermined optical gradient, namely a polarized gradient, transmissivity gradient or color gradient in which an ink jet printer is used to print a gradient pattern on an oriented sheet, with the ink jet printer being provided with a dye, in one embodiment a dichroic dye and in another embodiment an iodine dye. The printed oriented sheet is incorporated into a lens to provide the lens with the associated gradient.
Owner:DISTRIBUTED POLARIZATION
Light Controlling Apparatus and Transparent Display Including the Same
ActiveUS20160026026A1High light transmittanceDecrease index differenceNon-linear opticsDisplay deviceDichroic dye
A light controlling apparatus includes a first electrode on a first substrate; a first alignment film on the first electrode; a second electrode on a second substrate facing the first substrate; a second alignment film on the second electrode; and a guest-host liquid crystal layer having cholesteric liquid crystals and dichroic dyes between the first and second alignment films. The first and second electrodes provide a vertical electric field, and at least one of the first and second electrodes provides a horizontal electric field. The cholesteric liquid crystals have a homeotropic state when an electric field in a first direction is applied to the guest-host liquid crystal layer to realize a transparent mode. The cholesteric liquid crystals have a focal conic state when an electric field in a second direction is applied to realize a light shielding mode. A same state is maintained when no electric field is applied.
Owner:LG DISPLAY CO LTD
Liquid crystal electro-optical device and method of driving the same
InactiveUS7511776B2Improve viewing angle characteristicsLight utilization efficiencyLiquid crystal compositionsStatic indicating devicesDichroic dyeElectric field
An electric field that is parallel with a TFT substrate is formed by a pair of electrodes formed on the TFT substrate. Liquid crystal molecules in a light modulating layer are caused to respond electro-optically to the electric field. The light modulating layer is constituted of a liquid crystal material, an optically active substance, and a dichroic dye. The spiral pitch p [μm] of the light modulating layer, the cell thickness d [μm], the twist angle n of liquid crystal molecules, and the interelectrode interval L [μm] are set in ranges of 1≦p≦15, 1≦d≦10, n≦300°, and L<25.
Owner:SEMICON ENERGY LAB CO LTD
Light controlling apparatus, method of fabricating the light controlling apparatus, and transparent display device including the light controlling apparatus
ActiveUS20150378189A1Low costSimplify the manufacturing processStatic indicating devicesSolid-state devicesReady to useDichroic dye
A light controlling apparatus, a method of fabricating the light controlling apparatus, and a transparent display device including the light controlling apparatus are disclosed, in which light may be transmitted or shielded using a polymer dispersed liquid crystal (PDLC) layer and a guest-host liquid crystal (GHLC) layer, where the guest-host liquid crystal layer includes dichroic dyes. The light controlling apparatus includes first and second substrates facing each other; a first electrode on the first substrate; a second electrode on the second substrate; and a polymer dispersed liquid crystal (PDLC) layer and a guest-host liquid crystal (GHLC) layer between the first electrode and the second electrode, wherein the PDLC layer includes first liquid crystals having droplets, and the GHLC layer includes second liquid crystals and dichroic dyes.
Owner:LG DISPLAY CO LTD
Wide band variable transmittance optical device and mixture
ActiveUS20130258266A1Wide absorptionLiquid crystal compositionsNon-linear opticsTransmittanceLength wave
We describe a wide band variable transmission optical device, mixtures for use in such a device, and methods of making the same. The wide band optical device includes a cell comprising a guest-host mixture of a liquid crystal host and a dichroic guest dye material contained between a pair of plastic substrates. The optical device does not use polarizers. The liquid crystal host has an axis orientation that is alterable between a clear state orientation and a dark state orientation perpendicular thereto and the dichroic guest dye material includes one or more dichroic dyes. The optical device is characterized in that it exhibits a wide absorption band that is greater than 175nm within a visible wavelength range of 400-700nm and has a clear state transmission equal to or above 30% and a dark state transmission equal to or below 40%.
Owner:ALPHAMICRON INC
Light Controlling Apparatus and Transparent Display Including the Same
Owner:LG DISPLAY CO LTD
Process for preparing optical orientation film
InactiveCN1356585AImprove stabilityThin material handlingNon-linear opticsPolymer scienceOptical orientation
A process for preparing optical orientation film include coating the raw material containing dichroic dye whose molecule has more than 2 polymeric groups on a substrate, radiating it with polarized light to make it have orientation function, and heating of light radiating to polymerizing said groups. It has high and durable optical or thermal stability.
Owner:THE HONG KONG UNIV OF SCI & TECH +1
Azo Compounds And Dye-Type Polarizing Films Or Plates Containing The Same
InactiveUS20080094549A1Improve polarization performanceImprove staminaLiquid crystal compositionsMonoazo dyesHydrogenLCD projector
Azo compounds whose free acid forms are represented by the general formula (1) are extremely useful as the dichroic dye to be used in polarizing plates which are excellent in polarization performance and endurance and reduced in the color cross-talk within the visible light region or in polarizers for liquid crystal projectors made by using them; (1) wherein R1 is sulfo, carboxy, or lower alkoxy and R2 is sulfo, carboxy, lower alkyl, or lower alkoxy, with the proviso that a case wherein both R1 and R2 are each sulfo is excepted; R3 to R6 are each independently hydrogen, lower alkyl, or lower alkoxy; and R7 and R8 are each independently hydrogen, amino, hydroxy, sulfo, or carboxy.
Owner:NIPPON KAYAKU CO LTD +1
Liquid crystal panel and display including dichroic dye for absorbing yellow component of incident light
InactiveUS6147740AEasy to displayIncrease contrastLiquid crystal compositionsNon-linear opticsColor compensationDielectric anisotropy
A liquid crystal panel has a pair of substrates disposed almost parallel to each other. On each of the substrates, an electrode and an alignment film are formed. A liquid crystal layer having a negative dielectric anisotropy is sandwiched by the substrates. In the absence of voltage applied across the electrodes, the molecules of the liquid crystal layer align almost perpendicular to the substrates. In this liquid crystal layer, a dichroic dye, preferably a blue dichroic dye, is added to absorb the yellow component of an incident light. Instead of adding the dye into the liquid crystal layer, a color compensation layer containing the dye is formed on or adjacent to at least one of the substrates. The yellow component of an incident light to the liquid crystal panel is absorbed by the color compensation layer. As a result, the liquid crystal panel and the liquid crystal display using the panel do not show yellow coloring when the panel is observed from oblique directions.
Owner:SHARP KK
Compound and dichroic dye, and polarizing film
ActiveCN103333083AHigh dichroic ratioLiquid crystal compositionsOrganic chemistryWavelengthDichroic dye
The subject of the invention provides a polarizing film novel compound with largest absorption and capable of forming high dichroism ratio in a wave length scope of 400-520 nm, and a polarizing film including the novel compound. The invention provides a compound, a composition including the compound and a liquid crystal compound and a polarizing film formed by the composition represented by the formula (1). In the formula (1), Y is a perssad represented by (Y1) or (Y2). R1 is a perssad represented by any one of formula (R1-1)- formula (R1-3). R2 is a perssad represented by any one of formula (R2-1)-formula (R2-6).
Owner:SUMITOMO CHEM CO LTD
Composition for polarizing film, polarizing film, and display device including the polarizing film
A composition for a polarizing film including a polymer, a dichroic dye, and a liquid crystal oligomer, wherein the liquid crystal oligomer includes a mesogen unit and a kink-forming arylene unit, a polarizing film including the composition, and a display device including the polarizing film.
Owner:SAMSUNG ELECTRONICS CO LTD
Dichromatic dyestuff composition, and liquid crystal composition and liquid crystal element containing the same
Owner:SONY GRP CORP
Microencapsulated liquid crystal and a method and system for using same
InactiveUS6120701AIncrease display contrastExtended service lifeLiquid crystal compositionsThin material handlingCrystallographyLiquid-crystal display
Briefly, according to one aspect of the invention, liquid crystal material is microencapsulated by a method utilizing an interfacial polymerization reaction which creates a combination of polyurethane and polyurea polymers which form the capsule walls surrounding the discrete liquid crystal droplets. The formed capsule walls are designed to have an adjustable refractive index so as to allow for the matching of the refractive index to that of the liquid crystal and polymeric binder materials. This allows for the production of a liquid crystal droplet surrounded by polymer film, which is optically clear when the liquid crystal director is aligned with the electric field. The microencapsulated liquid crystal droplets improves the dye stability of a dichroic dye and enhances the contrast of a liquid crystal display.
Owner:HSU YING YEN
Method of manufacturing polarizing member
ActiveUS20110268874A1Increased durabilityQuality improvementPretreated surfacesCoatingsWater basedSolvent
An aspect of the present invention relates to a method of manufacturing a polarizing member comprising: forming a polarizing film by coating a dichroic dye-containing solution on a substrate; subjecting the polarizing film that has been formed to a treatment to immobilize the dichroic dye in the film; coating a waterborne resin composition containing a resin component and a water-based solvent on the polarizing film after the immobilization treatment, and drying the composition to form a primer layer; and forming a functional film on the primer layer that has been formed; wherein after the immobilization treatment but before the coating of the waterborne resin composition, an article to be coated is subjected to heat treatment.
Owner:HOYA CORP
Polarizer, polarizing plate, circular polarizing filter, image display system, and method of producing polarizer
InactiveUS20080112049A1Avoid absorptionAvoid lightOptical articlesPolarising elementsUltraviolet lightsDichroic dye
A polarizer of the present invention is characterized by containing at least one species of a photochromic dye in a resin. Preferably, the photochromic dye is used as a dichroic dye and aligned in one direction in the resin. A circular polarizing filter of the present invention has the polarizer and a retardation plate.In the polarizer of the present invention, the photochromic dye is colored by ultraviolet light irradiation and discolored by visible light irradiation or heat after being colored. By this photochromic property, the polarizer takes out linearly polarized light in being used in an environment of intense ultraviolet light, and on the other hand, the polarizer transmits light in an environment of weak ultraviolet light.
Owner:NITTO DENKO CORP
Dichroic dye and microencapsulated liquid crystal composition thereof
ActiveUS20060147652A1Good light fastnessImprove solubilityLiquid crystal compositionsAnthraquinone-azo dyesCrystallographySolubility
Dichroic dyes, compositions thereof, and liquid crystal compositions, microencapsulated liquid crystal compositions and liquid-crystal display elements employing the same. The dichroic dyes have high photostability in addition to excellent solubility. Furthermore, the liquid crystal composition employing the above dichroic dyes can have an orientational order parameter more than 0.7.
Owner:IND TECH RES INST
Polarizing plate, optical member, and liquid crystal display device
ActiveCN101932960AHigh hardnessHigh mechanical strengthPolarising elementsNon-linear opticsLiquid-crystal displayMeth-
Owner:SUMITOMO CHEM CO LTD
Electronic control light adjusting film based on liquid crystal and dichroic dye and preparing method thereof
ActiveCN107085327AAnti-peeping effect is goodEasy to prepareNon-linear opticsDisplay deviceIndium tin oxide
The invention relates to an electronic control light adjusting film based on liquid crystal and dichroic dye. The film comprises a first transparent indium tin oxide plastic conductive film layer, a composite material film layer and a second transparent indium tin oxide plastic conductive film layer; the composite material film layer comprises liquid crystal molecules, dichroic dye molecules and a macromolecule network, wherein a first composite material region is formed by the liquid crystal molecules and the dichroic dye molecules, a second composite material region is formed by the liquid crystal molecules, the dichroic dye molecules and the macromolecule network, and the first composite material region and the second composite material region are alternately arrayed in the composite material film layer in the direction perpendicular to incident light in a periodicity mode. The electronic control light adjusting film has the advantage that the angle range of transmission light can be adjusted. The electronic control light adjusting film is hopeful to be applied to display devices, and an electric field is opened and closed so that the display devices can be switched between a peeping preventing state and a non-peeping preventing state.
Owner:PEKING UNIV
Polarizing element and method of producing the same
ActiveUS20100134726A1Liquid crystal compositionsRadiation applicationsLiquid crystallineHydrogen atom
A polarizing element, containing: a transparent support; a light absorption anisotropic layer formed of a dichroic dye composition; and a transparent resin cured layer, with the layers being laminated in this order on the support, and with the composition containing at least one dichroic dye of formula (I) which has nematic mesomorphism but containing no liquid crystalline achromatic compound:wherein R1 to R4 are a hydrogen atom or a substituent; R5 and R6 are a hydrogen atom or an alkyl group; L1 represents —N═N—, —CH═N—, —N═CH—, —C(═O)O—, —OC(═O)— or —CH═CH—; A1 represents a phenyl, naphthyl or aromatic heterocyclic group; B1 represents a divalent aromatic hydrocarbon or divalent aromatic heterocyclic group; and n is an integer from 1 to 5.
Owner:FUJIFILM CORP
Guest-host liquid crystal display device and guest-host liquid crystal composition
A guest-host liquid crystal display device comprises a pair of substrates opposing each other with a space therebetween, a guest-host liquid crystal held in the space, the guest-host liquid crystal containing a dichroic dye mixture exhibiting a black color as a whole, and electrodes provided on the substrates for applying a voltage to the guest-host liquid crystal. The dichroic dye mixture comprises a bis-azo blue dye having a thienothiazole ring represented by the following chemical formula (1) and a tris-azo bluish purple dye having a benzothiazole ring represented by the following chemical formula (2): wherein R1 is a hydrogen or halogen atom, CnH2n+1, COCnH2n+1, OCOCnH2n+1, COOCnH2n+1, or CH2COOCnH2n+1, wherein n is an integer from 1 to 8; each of R2 and R3 is a hydrogen atom or CnH2n+1; R3 may be or and a combination of R2 and R3 may form wherein n is an integer from 1 to 8, and m is an integer from 1 to 5; and R4 is a hydrogen or halogen atom, or CnH2n+1, wherein n is an integer from 1 to 8.
Owner:SONY CORP
Novel light polarizing film with melanin
A dichroic dye can be blended with a non-dichroic dye (melanin and melanin derivatives) and still maintain a commercially acceptable level of polarizing efficiency. Efficient polarizers exhibit polarizing efficiencies of greater or equal to 95% and the best are even greater than or equal to 98%. Since melanin has unique features with respect to absorption of wavelengths of light, melanin is very useful to have in combination with a polarizer that takes advantage of this absorption. The blending can be done by a mixture (preferably an aqueous mixture) of melanin and a dichroic dye in a ratio sufficient to achieve the desired color and polarizing effect.
Owner:HOYA OPTICAL LABS OF AMERICA INC
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