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58results about How to "Improve electro-optic performance" patented technology
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Method for preparing polymer dispersion liquid crystal material by ultraviolet-heating step-polymerization process
ActiveCN101225308AIncrease crosslink densityImprove interfacial adhesionLiquid crystal compositionsUltraviolet lightsPolymer network
The invention in particular relates to a preparation method of polymer dispersing liquid crystal film by an ultraviolet irradiating-heating plus stepwise initiated polymerization and phase separation method, belonging to the functional material field, which is applied in the preparation of electric controlled intelligent glass. The preparation method is characterized in that: the nematic liquid crystal, the monomer which can be polymerized under ultraviolet light, the light initiator, the thermal polymerized monomer and the glass microsphere is blended and then are clipped between two pieces of transparent conductive film plated with indium tin oxide, and then film with the thickness of 20 Mum if formed and is irradiated by the ultraviolet light with the wavelength of 365nm at 0 to 25 degrees; the intensity of the ultraviolet light is 20.0mW / m<2> and the illumination time is 1 to 10 minutes; the thermal polymerization temperature is 60 to 100 degrees, the holding time is 5 to 8 hours, at last the PDLC film is prepared by solidification. The polymer dispersing liquid crystal film has the advantages that: because of the stepwise polymerization crosslinking reaction which is carried out by selecting the monomer polymerized by ultraviolet and thermal polymerized monomer and irradiating and heating under ultraviolet light, the electro-optic performance the PDLC film is improved, the network strength of the polymer is enhanced, meanwhile, the bonding force of the interface between the polymer network and the ITO film are reinforced.
Owner:UNIV OF SCI & TECH BEIJING
Laminated conductive film, electro-optical display device and production method of same
InactiveUS20090108264A1Improve electro-optic performanceVacuum evaporation coatingSolid-state devicesElectricityOptical property
The present invention provides a laminated conductive film, comprising a transparent conductive film and Al-based film, that is capable of realizing a high-quality film with superior electro-optical properties, without providing a buffer layer or protective layer. A laminated conductive film according to one aspect of the present invention is provided with a transparent conductive film having optical transmissivity, and a metal conductive film laminated directly on the transparent conductive film and electrically connected to the transparent conductive film. The metal conductive film is made of Al or has Al as a main component thereof and contains at least one of nitrogen atom and oxygen atom at least in the vicinity of the interface with the transparent conductive film.
Owner:MITSUBISHI ELECTRIC CORP
Triazine ring based polymers for photoinduced liquid crystal alignment, liquid crystal alignment layer containing the same, liquid crystal element using the alignment layer and method of manufacturing the same
InactiveUS20040039150A1Easy alignmentImprove stabilityLiquid crystal compositionsOrganic chemistryCrystallographyPhotoisomerization
Triazine ring based polymers for photoinduced liquid crystal alignment introduces photoactive groups for inducing, reinforcing, improving and preserving liquid crystal alignment, for example photoreactor such as cinnamate, coumarin, chalcone and maleimide, as a chain to have at least one photoactive group. One of the photoactive groups can experience Fries rearrangement which induces liquid crystal alignment, and other groups can experience photodimerization, photoisomerization, photocrosslinking or photodegradation to reinforce, change or preserve the generated alignment.
Owner:LS MTRON LTD
Secondary electro-optic crystal with gradient refractive index effect as well as preparation method and application method of secondary electro-optic crystal
ActiveCN105220232ALarge refractive index gradientRealize functional compoundPolycrystalline material growthBy pulling from meltRefractive indexCrystal growth
The invention specifically relates to a secondary electro-optic crystal with a gradient refractive index effect as well as a preparation method and an application method of the secondary electro-optic crystal. The secondary electro-optic crystal is an ion doped electro-optic crystal with a general formula of M: KTa[1-x]NbxO3, and has a perovskite structure, wherein M=Cu<2+>, Fe<3+>, Sn<4+>, Ni<2+>, Ti<4+>, Na<+> and Li<+>, and the content of M is 0-5at%; the content x of Nb in a crystal component is more than or equal to 0 and less than or equal to 5, a curie point is positioned between -241 and 90 DEG C, the crystal above the curie point is a cubic phase and an m3m point group; and the crystal below the curie point becomes a tetragonal phase and a 4mm point group, a matrix component Ta / Nb is uniformly distributed in the crystal, doped ions M are in non-uniform distribution in the crystal, and the concentration distribution changes linearly along the growth direction of the crystal. The invention realizes functional combination of an electro-optic effect and a gradient refractive index effect of the crystal, and respectively realizes modulation of propagation direction and intensity of laser in different directions of the same modulation sample.
Owner:山东山科智晶光电科技有限公司
Encapsulated Polymer Network Liquid Crystal Material, Device and Applications
ActiveUS20120162596A1Improve mechanical propertiesImprove electro-optic performanceLiquid crystal compositionsNon-linear opticsPolymer scienceEmulsion
Polymer network liquid crystal materials have improved mechanical properties such as rigidity and hardness and substantially improved electro-optical performance. The PNLC material can be manufactured with an emulsion process so as to simplify substantially the manufacturing process. Each LC droplet can be configured with the polymer network extending substantially across the LC droplet, and the polymer network may comprise a material to lower substantially the switching voltage, such as a fluorinated acrylate that may interact with the liquid crystal so as to lower the surface tension of the LC droplet. The PNLC material may comprise an interfacial layer combined with the polymer network so as to decrease substantially the driving voltage.
Owner:ORBOTECH LTD
Nanoparticle-doped polymer dispersed liquid crystal thin film and preparation method thereof
ActiveCN109324433ALow viscosityReduce volatilityLiquid crystal compositionsNon-linear opticsInfraredLow voltage
The invention discloses a nanoparticle-doped polymer dispersed liquid crystal (PDLC) thin film and a preparation method thereof. A driving voltage V<sat> and contrast ratio CR of the thin film are adjusted by adjusting a mesh size of a polymer network, the transmittance T of near-infrared band of the thin film is adjusted by adjusting doping quantity of nanoparticle, the driving voltage of the PDLC thin film can be reduced by appropriate doping of the nanoparticle, so that the thin film which has excellent photoelectric performance and can be used for shielding infrared ray and ultraviolet rayis obtained, an atomized scattering state is converted to a transparent state under a relatively low voltage, and the thin film has wide application prospect in the correlated field of liquid crystaldisplay, intelligent glass, energy-saving building materials and automobile decoration.
Owner:PEKING UNIV +1
Polymer-dispersed blue-phase liquid crystal films
ActiveUS20160085095A1Fabrication can be reducedSimple processLiquid crystal compositionsStatic indicating devicesCrystallographyPhase separation process
A polymer-dispersed blue-phase (PDBP) liquid crystal film is formed from a polymer-based latex and blue-phase liquid crystals that are combined using an emulsification process or a polymerization-induced phase separation process. The resultant PDBP liquid crystal film includes droplets formed by the polymer-based latex that encapsulate the blue-phase liquid crystals therein, so as to allow the blue-phase liquid crystals to have a blue phase at room temperature. As such, the PDBP liquid crystal film is conducive for use in manufacturing processes, such as LCD (liquid crystal display) manufacturing processes, while providing desirable optical features, such as field-induced birefringence at low switching voltages.
Owner:KENT STATE UNIV
Method for enhancing electro-optical performance of liquid crystals by Cu2O nano-particles
ActiveCN105623675AImprove electro-optic performanceLower threshold voltageLiquid crystal compositionsCrystallographyLiquid-crystal display
The invention discloses a method for enhancing the electro-optical performance of liquid crystals by Cu2O nano-particles and belongs to the technical field of liquid crystal display. The method is characterized in that Cu2O nano mesoporous spheres and Cu2O nanospheres of the same size are doped with cholesteric liquid crystals N*-LCs at the mass fraction of 0.10-0.50% to form a nano material and liquid crystal compound, Cu2O MPS and Cu2O NS of the same size are doped with nematic liquid crystals 5CB at the mass fraction of 0.001-0.200% to form a nano material and liquid crystal compound, and prepared liquid crystal baths are adopted for electro-optical performance test. As a small quantity of Cu2O nano material is doped with the liquid crystals, the driving voltage of both the cholesteric liquid crystals and the nematic liquid crystals can be greatly reduced, and the voltage decreasing amplitude of the liquid crystals doped with the mesoporous spheres is larger than that of the liquid crystals doped with the nanospheres.
Owner:BEIHANG UNIV
Liquid crystal display panel, manufacturing method thereof and display device
ActiveCN103278976AReduce the driving voltageIncrease contrastNon-linear opticsElectricityDisplay device
The invention provides a liquid crystal display panel, a manufacturing method of the liquid crystal display panel and a display device and belongs to the technical field of liquid crystal display. The liquid crystal display panel comprises a first substrate, a second substrate, a PDLC layer, a first transparent electrode unit, a second transparent electrode unit and a third transparent electrode unit. The first substrate, the second substrate and the PDLC layer are arranged oppositely. The first transparent electrode unit is arranged on the face, facing the second substrate, of the first substrate and is connected with a TFT. The second transparent electrode unit is arranged on the face, facing the first substrate, of the second substrate and connected with a first voltage. The third transparent electrode unit is arranged on the first substrate and the second substrate, has a preset height and is connected with a second voltage and the polarity of the first voltage is opposite to that of the second voltage. When electricity is supplied, the same polarity is generated by the first transparent electrode unit and the second transparent electrode unit and the polarity of the first transparent electrode unit and the polarity of the second transparent electrode are opposite to that of the third transparent electrode unit; when the electricity is not supplied, liquid crystal molecules of the PDLC layer are arranged perpendicular to the substrates. According to the liquid crystal display panel, the driving voltage of an inversed type PDLC film can be reduced and the contrast ratio of the inversed type PDLC film can be improved.
Owner:BOE TECH GRP CO LTD
Organic second-order nonlinear optical chromophore with D-pi-A structure and its synthesis method and use
ActiveCN104558004AIncrease the lengthEasy transferGroup 4/14 element organic compoundsNon-linear opticsFuranSynthesis methods
The invention relates to the field of organic second-order nonlinear optical materials and especially relates to an organic second-order nonlinear optical chromophore which has a D-pi-A structure and utilizes julolidine or its derivative as an electron donor, a thiophene ring or a cyclic polyene structure as a conjugate electron bridge and tricyano-dihydro furan or trifluoro-substituted tricyano-dihydro furan as an electron acceptor, and its synthesis method and use. Through combination of the used electron donor, conjugate pi electron bridge and electron acceptor, the organic second-order nonlinear optical chromophore can improve an intramolecular electron transfer capability and improve intermolecular steric hindrance. The organic second-order nonlinear optical chromophore can effectively improve a chromophore molecule first-order hyperpolarization rate (beta) and can effectively reduce intermolecular interaction. The organic second-order nonlinear optical chromophore adopted with amorphous polycarbonate can be used for preparation of a polarized polymer film. The polarized polymer film can be used as a material in the optical signal modulation field. The organic second-order nonlinear optical chromophore has a structure shown in the following description.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Preparation method of light modulation film based on liquid crystal/polymer composite material
The invention provides a preparation method of a light modulation film based on a liquid crystal / polymer composite material. The method comprises the following steps that: after a liquid crystal, a photopolymerizable monomer and a photoinitiator are uniformly mixed according to a certain mass ratio, the mixture is in a clear state at a room temperature; on the basis of the siphon principle, the mixture is poured into a liquid crystal box, wherein the thickness of the liquid crystal box is controlled between 10 to 30 microns by a plastic spacer; irradiation under the ultraviolet light having the light intensity of 5 to 25 mw / cm<2> and the wavelength of 365 nm is performed for 5 to 20 minutes at a room temperature, so that a polymer dispersed liquid crystal film is formed. According to the invention, with introduction of the functional thiol monomer, the refractive index is high, the water resistance performance is excellent, the heat insulation effect is good, the oxidation resistance performance is excellent, the initiator amount is small, and the photoelectric property of the prepared PDLC film is improved substantially. Moreover, the size of the polymer mesh and the size of the liquid crystal droplet are adjusted by adjusting the mass ratio of acrylate to thiol to liquid crystal. The prepared polymer dispersed liquid crystal film has advantages of small driving voltage, highcontrast, and stable performance.
Owner:PEKING UNIV +1
Polymer dispersed liquid crystal (PDLC) membrane preparation method and PDLC membrane
InactiveCN109324434AImprove toughnessImprove stabilityLiquid crystal compositionsNon-linear opticsMicrosphereIrritation
The invention discloses a preparation method of a polymer dispersed liquid crystal (PDLC) membrane material and the prepared PDLC membrane. The preparation method comprises the steps that polymerizable monomers and a liquid crystal material are mixed according to the mass ratio of (3:7) to (7:3), and an ultraviolet initiating agent is added, wherein the ultraviolet initiating agent accounts for 3-5% of the total mass of the polymerizable monomers, and the adopted liquid crystal material is matched with the selected polymerizable monomers in refractive index; and a mixture is poured into a liquid crystal cell and irradiated under ultraviolet light, and thus the PDLC membrane is prepared. The adopted polymerizable monomers are not prone to volatizing, low in toxicity and small in irritation;a system is high in stability and easy to preserve; through a polymerization crosslinking reaction of ultraviolet light and acrylate and mercaptan monomers, a formed polymer matrix has a unique composite structure, namely, the composite structure is provided with the dense surface and a hole-type internal structure with attached microspheres, the polymer matrix is good in toughness, fast in deformation recovery and good in stability, the electro-optical performance of the PDLC membrane is greatly improved, and thus the PDLC membrane has the lower driving voltage, the high response speed and the high contrast.
Owner:PEKING UNIV +1
Second-order nonlinear optical chromophore having D-pi-A structure and treating julolidine derivative as donor, and synthetic method and use thereof
InactiveCN102875546AReduce the interaction forceIncreased hyperpolarizabilityGroup 4/14 element organic compoundsNon-linear opticsElectron donorMethyl group
The invention relates to the organic second-order nonlinear optical material field, and especially relates to an organic second-order nonlinear optical chromophore having a D-pi-A structure, and a synthetic method and a use thereof, wherein the organic second-order nonlinear optical chromophore is prepared through treating a 1,1,7,7-tetramethyljulolidine derivative as an electron donor and tricyanodihydrofuran or tricyanopyrroline as an electron acceptor. The alkyl group on the julolidine donor N used in the synthetic method and a phenyl ring form a closed six-membered ring, and the upper surface and the lower surface of the six-membered ring are respectively connected with a methyl group, so the spatial steric hindrance structure can effectively reduce the interaction force among molecules and improve the first-order molecular hyperpolarizability (beta) of the molecules of the chromophore. The organic second-order nonlinear optical chromophore having the D-pi-A structure can be doped with an amorphous polycarbonate to prepare a polarized polymer film, and the prepared film can be used as a material in the optical signal modulation field. The structures of the organic second-order nonlinear optical chromophore are represented by formulas in the specification.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
On-chip cascaded MZI reconfigurable quantum network based on lithium niobate
PendingCN111898741ABreakthrough computing efficiencyBreak through limitationsNeural architecturesOptical light guidesNetwork outputDetector array
The invention discloses on-chip cascaded MZI reconfigurable quantum network architecture based on lithium niobate. The on-chip cascaded MZI reconfigurable quantum network architecture comprises an input waveguide array serving as a neural network input layer, a plurality of MZIs which are optically connected with the input waveguide array and serve as a neural network hidden layer, a saturable absorber array, a nonlinear optical unit and a detector array serving as a neural network output layer. The MZIs are connected with each other and linearly converted into second array optical signals according to the first array optical signals; each saturable absorber in the saturable absorber array receives a corresponding optical signal in the second array optical signal and nonlinearly converts the optical signal into a third array optical signal, and the third array optical signal is detected by the detector array. According to the invention, the technical problem of on-chip coherent opticalneuromorphic calculation based on a photon integrated circuit is solved, and the limitation of calculation efficiency and power consumption in micro-electronic and hybrid optical electronic implementation is eliminated by a universal and reconfigurable quantum optical neural network.
Owner:SHANGHAI JIAODA INTELLECTUAL PORPERTY MANAGEMENT CO LTD
Biphenyl acetylene blue phase liquid crystal composite material and production method
ActiveCN102827615ASimple structureImprove solubilityLiquid crystal compositionsSolubilityDielectric anisotropy
The invention relates to a biphenyl acetylene blue phase liquid crystal composite material, which comprises at least a biphenyl acetylene liquid crystal compound and a chiral compound, wherein the range of the mass percentage Pc of at least one chiral compound is greater than 0 and less than or equal to 30%. The biphenyl acetylene blue phase liquid crystal composite material has wide blue phase temperature range, simple structure, good solubility, large optical anisotropy and dielectric anisotropy, and has good electrooptic performance. The invention also relates to a method for producing the biphenyl acetylene blue phase liquid crystal composite material.
Owner:KUSN INFOVISION OPTOELECTRONICS +1
Preparation method of polymer dispersed liquid crystal film
ActiveCN102585168AReduce viscosityIncrease viscosityLiquid crystal compositionsNon-linear opticsLiquid-crystal displayPolymer network
The invention provides a preparation method of a polymer dispersed liquid crystal film, is applied to preparation of electronic control intelligent glass and belongs to the field of liquid crystal material application. The method comprises the steps of: uniformly mixing thermal polymerizable monomers, curing agents, nematic liquid crystal and glass microbeads in certain mass ratio; subsequently clamping the mixture between two conductive films plated with indium tin oxide at the temperature 0.5-20.0 DEG C higher than the clearing temperature of the liquid crystal phase of the thermal polymerizable monomers / curing agents / liquid crystal composite materials; compressing with a roll shaft uniformly so as to form a film layer of 10.0-15.0 microns in thickness; heating for 5.0-7.0 hours at 70.0-90.0 DEG C; and finally curing so as to form the polymer dispersed liquid crystal film. The preparation method provided by the invention has the advantages that the thermal stability of a polymer network is enhanced; the flexibility of a PDLC (Polymer Dispersed Liquid Crystal) film is improved; and the mesh size of a macromolecule network is regulated by selecting the optimal ratio of two monomers, so that the purpose of improving the thermal stability and contrast ratio of polymer dispersed liquid crystal film materials and the binding force between the macromolecule network and an ITO (Indium-Tin Oxide) film is reached.
Owner:UNIV OF SCI & TECH BEIJING
Encapsulated polymer network liquid crystal material, device and applications
ActiveUS8801964B2Improve electro-optic performanceReduce surface tensionLiquid crystal compositionsNon-linear opticsPolymer scienceEmulsion
Polymer network liquid crystal materials have improved mechanical properties such as rigidity and hardness and substantially improved electro-optical performance. The PNLC material can be manufactured with an emulsion process so as to simplify substantially the manufacturing process. Each LC droplet can be configured with the polymer network extending substantially across the LC droplet, and the polymer network may comprise a material to lower substantially the switching voltage, such as a fluorinated acrylate that may interact with the liquid crystal so as to lower the surface tension of the LC droplet. The PNLC material may comprise an interfacial layer combined with the polymer network so as to decrease substantially the driving voltage.
Owner:ORBOTECH LTD
Methods and apparatus for driving electro-optic displays
InactiveUS9530363B2Shorten the overall cycleReduce data volumeStatic indicating devicesNon-linear opticsGray levelDisplay device
The performance of an electro-optic display, for example, a bistable electro-optic display, can be improved by modifying the frame rate of a base waveform used to drive a transition between gray states. Such modifications permit fine control of gray levels with reduced artifacts. The described methods additionally require less memory to store all of the waveforms needed to achieve good performance of an electro-optic display over a range of temperatures.
Owner:E INK CORPORATION
Nematicliquid crystal electrooptical element and device
InactiveCN1439113AEnhance bistabilityImprove electro-optic performanceNon-linear opticsTO-18Engineering
A liquid crystal electrooptical element comprises a pair of substrates (20, 21) positioned between a pair of polarising plates, electrodes defining pixel areas (1) and alignment layers disposed on the respective opposing inside surfaces of said substrates (20, 21) and a chiral nematic liquid crystal sandwiched between said pair of surfaces. At least one of the alignment layers is patterned in such a way that the azimuth or pretilt or both alignment directions (14 to 17, 16 to 18) are different at the substrate interfaces suppressing the growth of the ground state of the liquid crystal. When an initial electrical pulse is applied, one of the at least two bistable states is reached, wherein the contrast ratio between said bistable states is two or greater. A device with these elements is long-term bistable and does not require electronic refreshing as long as the displayed information is not changed. Therefore, the power consumption of this bistable device is minimal.
Owner:ROLIC AG
Polymer for electrooptical material, dispersed liquid crystal film and method for preparing polymer
InactiveCN102746443AReduce the interaction forceReduce volatilityLiquid crystal compositionsNon-linear opticsBenzoyl peroxidePolymer science
A polymer for an electrooptical material is composed of 0.025-0.085 part of benzoyl peroxide, 0.1-0.35 part of chain transfer agent, 5-15 parts of styrene derivatives and 20-60 parts of acrylic ester I by weight. The polymer is prepared from a living radical polymerization method, and can be used as a macroinitiator to be applied in the basis material of a polymer dispersed liquid crystal film material so as to prepare a polymer dispersed liquid crystal (PDLC) film. The prepared PDLC film has the driving voltage of no more than 25V and the On-state transmittance of above 65% at the same time, so the comprehensive electro-optic performance of the PDLC film can be obviously improved.
Owner:常州市弘可利办公用品有限公司
Method of making a long wavelength indium gallium arsenide nitride (InGaAsN) active region
InactiveUS7033938B2Minimise concentrationConcentration maximizationPolycrystalline material growthLaser detailsIndiumLight emission
The active region of a long-wavelength light emitting device is made by providing an organometallic vapor phase epitaxy (OMVPE) reactor, placing a substrate wafer capable of supporting growth of indium gallium arsenide nitride in the reactor, supplying a Group III–V precursor mixture comprising an arsenic precursor, a nitrogen precursor, a gallium precursor, an indium precursor and a carrier gas to the reactor and pressurizing the reactor to a sub-atmospheric elevated growth pressure no higher than that at which a layer of indium gallium arsenide layer having a nitrogen fraction commensurate with light emission at a wavelength longer than 1.2 μm is deposited over the substrate wafer.
Owner:AVAGO TECH WIRELESS IP SINGAPORE PTE
Preparation method of polymer dispersed liquid crystal film
PendingCN113980274AExcellent mechanical propertiesGood electro-optical performanceLiquid crystal compositionsNon-linear opticsPhotoinitiatorElectro-optics
The invention discloses a preparation method of a polymer dispersed liquid crystal film. The preparation method comprises the steps of S1, mixing the following raw materials in percentage by mass to obtain a liquid crystal mixed solution: 30-80% of a liquid crystal material, 5-50% of a thiol monomer, 5-50% of an acrylate monomer, 5-50% of an alkene polymerizable monomer, 0-15% of a cross-linking agent and 0-10% of a photoinitiator; S2, taking two transparent substrates coated with a conductive ITO coating, andoppositely arranging the surfaces with the conductive ITO coating to form a liquid crystal box; S3, pouring the prepared liquid crystal mixed solution into the liquid crystal box, and solidifying the liquid crystal mixed solution through polymerization reaction; and S4, respectively connecting the conductive ITO coatings of the two transparent substrates with two electrodes of a power supply assembly. According to the preparation method of the polymer dispersed liquid crystal film, liquid crystal molecules are converted into an isotropic state on the basis of a polymerization reaction of thiol-alkene monomers, and the finally prepared polymer dispersed liquid crystal film is excellent in mechanical property, good in electro-optical property and longer in service life.
Owner:PEKING UNIV
Preparation method of polymer dispersed liquid crystal film
ActiveCN102585168BReduce viscosityIncrease viscosityLiquid crystal compositionsNon-linear opticsLiquid-crystal displayPolymer network
Owner:UNIV OF SCI & TECH BEIJING
Photoelectric monolithic integration system based on multi-material system
ActiveCN111474745ASmall sizeReduce adverse effectsCoupling light guidesOptical waveguide light guideHemt circuitsRefractive index
The invention provides a photoelectric monolithic integration system based on a multi-material system. According to the system, an indium phosphide-silicon laser, a silicon passive photonic device, asilicon nitride passive photonic device, a silicon nitride-lithium niobate electro-optical modulator, a germanium-silicon detector and an electronic circuit are integrated on the same substrate, so that the size of a photoelectric system is reduced, the electrical and optical interconnection distance is reduced, and the adverse effect of parasitic parameters on the integrated system is greatly reduced. The packaging between the optical path module and the circuit module is avoided, and the packaging cost is reduced. The advantages of excellent electro-optical performance of the lithium niobatematerial, low loss, low polarization sensitivity and high process tolerance of the silicon nitride material and high refractive index of the silicon material are exerted, and a monolithic photoelectric integrated system with excellent performance is realized.
Owner:SHANGHAI JIAO TONG UNIV
Methods and apparatus for driving electro-optic displays
InactiveUS20160171935A1Improve electro-optic performanceImprove performanceCathode-ray tube indicatorsNon-linear opticsGray levelDisplay device
The performance of an electro-optic display, for example, a bistable electro-optic display, can be improved by modifying the frame rate of a base waveform used to drive a transition between gray states. Such modifications permit fine control of gray levels with reduced artifacts. The described methods additionally require less memory to store all of the waveforms needed to achieve good performance of an electro-optic display over a range of temperatures.
Owner:E INK CORPORATION
Organic nonlinear optical crystal material DOBT and preparation method thereof
PendingCN113293439AImprove the degree of non-central symmetryEasy to preparePolycrystalline material growthFrom normal temperature solutionsNonlinear optical crystalMeth-
The invention belongs to the technical field of functional materials and preparation thereof, and relates to an organic nonlinear optical crystal material DOBT and a preparation method thereof. The method comprises the following steps: firstly, preparing methyl p-toluenesulfonate and 2-methylbenzothiazole solutions with equal molar weight by taking methanol as a solvent, and then mixing the two prepared solutions for reaction; adding 3,4-dimethoxybenzaldehyde with equal molar weight, and adding a catalyst for reaction to obtain a crystal growth raw material; and then carrying out DOBT crystal growth by adopting a spontaneous nucleation method. The obtained crystal belongs to a nonlinear optical crystal, and molecules with benzothiazole rings are contained in the structure, so that the non-centrosymmetric degree of the crystal is further improved, and the generation of a relatively large second-order nonlinear optical coefficient is facilitated; the second-order nonlinear optical property of the material is about 6 times that of KDP, and the material also has good electro-optical performance. The preparation method of the crystal is simple and convenient, the nonlinear performance is better, and the crystal has a higher application prospect.
Owner:QINGDAO UNIV
Inverted structure OLED device based on strong electron injection layer and manufacturing method thereof
InactiveCN111211249AInjection helpsExcellent short wavelength emissionSolid-state devicesSemiconductor/solid-state device manufacturingElectron injectionMolybdenum trioxide
The invention discloses an inverted structure OLED device based on a strong electron injection layer and a manufacturing method thereof. The inverted structure OLED device comprises an ITO transparentcathode, a strong electron injection layer, a BPhen electron transport layer, a TAZ light-emitting layer, a CBP hole transport layer, a molybdenum trioxide hole injection layer and an Al anode from left to right. The strong electron injection layer comprises one or two of a zinc oxide layer and a cesium carbonate layer or a zinc oxide-cesium carbonate layer. The manufacturing method comprises thesteps of preparation of a cesium carbonate-ethanol solution and a zinc oxide-methanol solution, preparation of a mixed solution, treatment of the ITO transparent cathode and preparation of the inverted-structure OLED device. In the invention, cesium carbonate and zinc oxide are preferably selected to be compounded so as to serve as the strong electron injection layer; based on a TAZ light emitting layer, the OLED device shows excellent short wavelength emission, a maximum radiance is 2.42 mW / cm<2>, EQE is 0.85%, working durability is improved, and XPS analysis shows that s-ZnO+Cs2CO3 shows excellent electronic performance and is beneficial to electron injection so that electro-optical performance of the OLED device with the inverted structure is improved.
Owner:GUILIN UNIV OF ELECTRONIC TECH +2
Organic second-order nonlinear optical chromophore, synthetic method and application
InactiveCN106279133AEasy transferReduce the interaction forceOrganic chemistryLuminescent compositionsSolubilityOrganic solvent
The invention discloses an organic second-order nonlinear optical chromophore, a synthetic method and an application. The organic second-order nonlinear optical chromophore is provided with a structure of a Formula (CL) or Formula (HCL): FORMULA, wherein G is H, para-alkoxyphenyl, thienyl, or para-dialkyl aminophenyl; R1 is alkyl, benzyl, and halogenated alkyl; R2 is methyl or trifluoromethyl; R3 is alkyl, phenyl, replaced phenyl, replaced thienyl or hydroxyalkyl. The organic second-order nonlinear optical chromophore with D-Pi-A structure has simple synthetic step and high preparation yield; besides, it has good solubility in the most organic solvent and high thermal stability; the organic second-order nonlinear optical chromophore can be widely applied to the field of optical information material.
Owner:TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Inverted-structure OLED device based on strong electron injection layer and preparation method thereof
InactiveCN111584764AExcellent short wavelength emissionImprove work durabilitySolid-state devicesSemiconductor/solid-state device manufacturingElectron injectionMolybdenum trioxide
The invention discloses an inverted-structure OLED device based on a strong electron injection layer and a preparation method thereof. The inverted-structure OLED device comprises an ITO transparent cathode, a strong electron injection layer, a BPhen electron transport layer, a TAZ light-emitting layer, a CBP hole transport layer, a molybdenum trioxide hole injection layer and an Al anode from left to right. The strong electron injection layer comprises one or two of a zinc oxide layer and a cesium carbonate layer or a zinc oxide-cesium carbonate layer. The preparation method comprises the steps of preparation of a cesium carbonate-ethanol solution and a zinc oxide-methanol solution, preparation of a mixed solution, treatment of the ITO transparent cathode and preparation of the inverted-structure OLED device. According to the invention, the cesium carbonate and zinc oxide are compounded as the strong electron injection layer; based on the TAZ light-emitting layer, the OLED device shows excellent short wavelength emission, has the maximum radiance of 2.42 mW / cm<2> and EQE of 0.85%, and improves the working durability; and XPS analysis shows that the zinc oxide-cesium carbonate layer shows excellent electronic performance and is beneficial to electron injection, so that the electro-optical performance of the inverted-structure OLED device is improved.
Owner:GUILIN UNIV OF ELECTRONIC TECH +2
A preparation method of nano-doped intelligent dimming film
ActiveCN105238112BImprove electro-optic performanceEvenly dispersedCoatingsNon-linear opticsSynthesis methodsUltraviolet lights
The invention discloses a method for preparing a nano-doped intelligent light-adjusting film. The method comprises the steps of preparing nano metal-oxide particle crystal gel by using a hydrothermal-method or solvothermal-method synthesis method, mixing the gel nanoparticles with relatively high dispersion activity with a prepolymer, adding a small amount of coupling agent into the mixture, mixing the nanoparticles and the prepolymer, dispersing the nanoparticles by using stirring and ultrasonic waves so as to form prepolymer nano sol, mixing the prepolymer nano sol with acrylate and nematic liquid crystals, adding a spacer into the mixture, coating the surface of a PET (Polyethyleneglycol Terephthalate) conductive film with the spacer added mixture by a roll coating process, and initiating photopolymerization under the condition of ultraviolet light, thereby preparing the intelligent light-adjusting film with excellent electro-optic characteristics. According to the method, parameters such as dielectric constant and refractive index of a polymeric matrix are changed through carrying out nano modification on the polymeric matrix, the electro-optic properties of the intelligent light-adjusting film are improved, the operating voltage is 30V, and the light transmittance of the intelligent light-adjusting film is about 70%; and meanwhile, the nano metal oxide particles synthesized by using the hydrothermal or solvent method are dispersed in the polymeric matrix, and the nanoparticles are good in dispersion activity and are not prone to agglomeration, so that the homogeneous dispersion of the nanoparticles in the polymeric matrix is guaranteed.
Owner:浙江鼎昇新材料科技股份有限公司
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