43results about How to "Stable transmittance" patented technology

The invention discloses a preparation method of methyl phenyl vinyl silicone resin. The preparation method comprises the following steps: firstly mixing and agitating organic solvent, deionized water and strong acid, then dropwise adding a mixture for hydrolysis reaction, and increasing temperature and reflowing to obtain mixed solution, wherein the mixture consists of difunctional alkoxy silane, trifunctional alkoxy silane, monofunctional alkoxy silane and tetraethoxysilane; standing the mixed solution, cooling to room temperature, separating out an organic layer, washing the organic layer with deionized water till the organic layer becomes neutral, then adding an alkaline catalyst into the organic layer, increasing the temperature for azeotropic reflowing for a certain time to obtain azeotropic reflowing solution; cooling the azeotropic reflowing solution to 50 DEG C below, then adding solid acidic neutralizer, stirring for neutralizing, filtering, and conducting vacuum purification to obtain the methyl phenyl vinyl silicone resin. According to the preparation method, the process is easy to control, the labor intensity is low, the whole process has small toxicity, and the preparation method has the advantages that monomer sources are wide, cost is low, and the prepared methyl phenyl vinyl silicone resin has stable storage performance.

The invention discloses a high-transmittance touch screen, including a substrate and at least a multi-layer reflection configuration which is a four-layer structure coated on the front surface of the substrate with designed refractive index of high, low, high and low calculated from the side adjacent to the substrate, wherein the outer layer is a protection layer with protecting function provided with a reflective index laid between 1.3~1.5, a thickness of at least 0.1micrometre, and the hardness accorded with ASTM-D3363 international inspection standard, and due to the design of the protecting layer, the transmittance of the touch screen reaches ASTM-D1003 92% or more, and also strengthens the antiware performance of the surface.

An array substrate of a liquid crystal display device and a method for fabricating the array substrate are provided. The array substrate includes: a gating line and a data line crossing each other to define a pixel region on the substrate; data line shielding common electrodes arranged at both sides of the data line; a thin film transistor formed at a crossing of the gating line and the data line; a black matrix arranged on a region including the data line and a part of data line shielding common electrodes; a color filter arranged at the pixel region defined by the gating line and the data line crossing each other; and a common electrode and a pixel electrode arranged at the pixel region defined by the gating line and the data line crossing each other.

A spinel sintered body has a composition of MgO·nAl₂O₃ (1.05≦n≦1.30) containing 20 ppm or less of Si element. A production method thereof includes the steps of: forming a compacted body from a spinel powder containing 50 ppm or less of Si element and having a purity of not less than 99.5 mass %; a first sintering step of forming a sintered body having a density of not less than 95% by sintering the compacted body at 1500° C. to 1700° C. in a vacuum; and a second sintering step of subjecting the sintered body to pressurized sintering at 1600° C. to 1800° C.

A driving method is cooperated with a blue phase liquid crystal display (LCD) apparatus having a first substrate and a second substrate opposite to the first substrate. The first substrate has a first electrode layer, and the second substrate has a pixel electrode and a second electrode layer. The driving method includes the steps of: transmitting a first gray level voltage to the pixel electrode; transmitting a first black frame insertion voltage to the pixel electrode; and transmitting a first voltage to the first electrode layer, thereby providing a voltage gap between the first electrode layer and the second electrode layer. Accordingly, the dark-state light-leakage of the blue phase LCD apparatus can be improved.

The objects of the present invention is to provide an infrared shielding film, a method for producing same, and an infrared shielding body provided with the infrared shielding film, whereby it is possible to maintain stable infrared shielding property, visible light transmittance, flexibility, and transparency over time. This infrared shielding film having at least one unit consisting of a high refractive index layer having metal oxide particles and a low refractive index layer on a substrate is achieved when (i) at least one layer of the high refractive index layer and the low refractive index layer contains a temperature responsive polymer as a binder component or (ii) the high refractive index layer has any one of a cellulose compound or polyvinyl acetal resin as a binder component, and the low refractive index layer contains a binder component different from that of the high refractive index layer.

The invention provides an atomic gas chamber of a compound eye-type stacked dense multi-bubble structure. The atomic gas chamber comprises a glass shell and a filled medium, a plurality of micro-atomic air bubbles configured by glass walls are also arranged in the glass shell, and the micro-atomic air bubbles are filled with alkali metal atoms and a buffer gas. The atomic gas chamber of the compound eye-type stacked dense multi-bubble structure provided by the invention can stabilize the temperature coefficient and suppress the frequency shift, and solve the constrain of the bubble-type germanium atomic frequency standard and the rubidium atomic magnetometer on the long-term frequency stability index due to the changes of the temperature and pressure of the atomic chamber, thereby solvingthe problem of long-term frequency drift. The technical scheme of the invention provides atomic gas chambers with lower temperature coefficients, temperature fluctuation and less pressure shift for applications requiring higher demands such as atomic clocks, atomic magnetometers, atomic filters, and Faraday active light clocks, etc.

A resin composition for an optical semiconductor, a manufacturing method thereof, and an optical semiconductor device for encapsulating a semiconductor element by using the composition, the resin composition for the optical semiconductor being characterized by comprising (A) an epoxy resin containing a solid epoxy resin, (B) a liquid acid anhydride, (C) a curing accelerator and (D) carbon black having an average primary particle diameter of 1 to 50 nm, the content of the (D) carbon black being 0.01-0.05 % by mass of the whole composition.

The invention relates to the field of agricultural mulch films, in particular to a black mulch film for tobaccos and a preparation method of the black mulch film. The black mulch film is prepared from, by weight, 50-90 parts of first linear low-density polyethylene, 10-40 parts of second linear low-density polyethylene and 1-10 parts of black masterbatch. The black masterbatch is prepared from, byweight, 5-50 parts of third linear low-density polyethylene, 5-50 parts of low-density polyethylene, 20-90 parts of carbon black and 1-30 parts of an auxiliary agent. The black mulch film for tobaccos is high in mechanical strength and convenient to recover mechanically and manually, the recovery rate is increased, and recovery cost reduction is realized; the transmittance of the black mulch filmis in a range of 25%-30%, the grass control rate reaches 90% or above, soil heat can be better preserved, adverse effects of extreme high temperature on tobacco growth can be avoided, and the dry tobacco yield of a tobacco field mulched with the black mulch film is 1.57% higher than that of a tobacco field mulched with a transparent mulch film.

The invention discloses a method for improving the cycling stability of a prussian-blue electrochromic film in a LiClO4/PC electrolyte, and belongs to the field of function-material technology application. Weak acid (acetic acid, oleic acid, oxalic acid and the like can be selected) is dropped into the configured LiClO4/PC electrolyte, the prussian-blue electrochromic film is put into the electrolyte and subjected to electrochromism. The cycling stability can be improved, and the service life is prolonged.

The invention discloses a thermal-infrared-spectrum atmospheric extinction measurement method and device. The device comprises a normal-temperature surface source black body. A plane mirror is disposed right ahead the normal-temperature surface source black body in a light transmission direction; and a Fourier spectrometer is disposed at the right side of the plane mirror in a light transmission direction. An aperture diaphragm is arranged between the normal-temperature surface source black body and the plane mirror in the light transmission direction and is arranged at an optical chopper. A chopper plate of the optical chopper is arranged in front of the normal-temperature surface source black body; and the center of the chopper plate is located at the right side of the normal-temperaturesurface source black body. A neutral infrared attenuation sheet is also arranged on the chopper plate. According to the invention, the atmospheric extinction is inverted by measuring atmospheric radiation spectra at different zenith angles, so that the dependence on standard satellites is eliminated and the infrared atmospheric extinction spectral distribution can be obtained simply, convenientlyand efficiently. The high-precision measurement of spectral atmospheric extinction can be realized; and a problem that the calibration black body and atmospheric radiance exceed the linear dynamic range of a measuring instrument is solved.

The invention relates to a potassium citrate mother liquor deironing purification process, which comprises the following specific steps: (1) adding pure water into potassium citrate last mother liquorto dilute the potassium citrate last mother liquor, and then heating to 60-80 DEG C to obtain a solution A; (2) adding citric acid into the solution A, and adjusting the pH value to 6.5-8.0 to obtaina solution B; (3) adding a certain amount of hydrogen peroxide into the solution B, and oxidizing ferrous iron in the solution B into ferric iron to obtain a solution C; (4) enabling the solution C to pass through an ion exchange column filled with cationic resin according to the flow rate of 150L/h-200L/h to obtain a solution D; (5) enabling the solution D to pass through an activated carbon column at the flow rate of 150L/h-200L/h, and removing readily carbonizable compounds to obtain a solution E; and (6) carrying out evaporative crystallization, centrifugal separation and drying on the solution E to obtain a potassium citrate product. According to the potassium citrate mother liquor purification process, iron and readily carbonizable compounds in the potassium citrate mother liquor can be effectively removed, the yield of potassium citrate is increased by about 5%, zero emission of the potassium citrate mother liquor is achieved, and economic benefits and environmental protectionbenefits are remarkable.

A multi-domain LCD device and a method for manufacturing the same are provided, in which it is possible to prevent an opening from being asymmetrical due to the bonding of margins of two substrates, thereby stabilizing peak transmittance characteristics and obtaining a wide viewing angle. The multi-domain LCD device includes first and second substrate being opposite to each other, a color filter layer having an opening on the first substrate, an insulating layer on the entire surface of the first substrate including the color filter layer, a first alignment layer on the insulating layer, a protrusion on the second substrate and corresponding to the opening of the first substrate, a second alignment layer on the entire surface of the second substrate including the protrusion, and a liquid crystal layer between the first and second substrates.

A transmission mechanism for a remote-controlled model simulation helicopter includes a body frame which is orderly provided with a main rotor holder, a main rotor shaft, and a main reduction gear provided with a plurality of washout holes which are evenly distributed about an axis thereof. The body frame is provided with a swashplate module and a servo arrangement at a middle portion thereof. Since the main reduction gear is provided with washout holes and the introduction of internally installed swashplate module together with taking advantage of self structural features of the body frame, it enables the elimination of the commonly used swashplate guide board. The servo devices are provided in a same plane within the body frame and provide a triangular configuration, so that the structure is reasonable and the transmittance of motion is stable.

The invention relates to a PC resin material with a neutral filtering effect as well as a preparation method and application of the PC resin material. The PC resin material with the neutral filtering effect comprises polycarbonate, an antioxidant, a dispersing agent and an additive. The PC resin material with the neutral filtering effect, provided by the invention, has a flat transmittance curve at a spectral band of 400-1000nm, has a better neutral filtering effect, has the advantages of easiness in processing and low cost, and can be widely applied to preparation of optical products.

The invention discloses a photovoltaic panel film layer for river regulation and a production process, the film layer is used for the surface of a photovoltaic panel, and the film layer comprises the following raw materials in parts by weight: 50-70 parts of epoxy modified polyacrylic resin, 1-5 parts of a curing agent, 2-8 parts of an infrared reflection filler, 1-5 parts of a heat dissipation filler, 1-10 parts of a self-cleaning filler, 0.2-0.6 part of a leveling agent and 15-30 parts of a solvent. According to the film layer for protecting the antireflection layer of the photovoltaic glass, the antireflection layer of the antireflection glass can be well protected, the service life of the antireflection layer is effectively prolonged, and the stability of the power generation power of a component is ensured. By reasonably selecting the raw materials and proportion of the components, the components of the film layer have a synergistic effect, the light transmittance of the photovoltaic panel is maintained, meanwhile, the passing rate of infrared rays is greatly reduced, the heat dissipation filler is cooperated, the temperature of the inner layer can be greatly reduced, the efficiency of a component in the actual use process is improved, meanwhile, the surface hardness of the coating is high and is 2H or above, and the service life of the coating is prolonged. And the coating is scratch-resistant and good in weather resistance.

The present disclosure relates to an apparatus and a method for measuring miscibility in oil using back titration. The apparatus includes: a flocculation solution storage unit; a flow cell including a UV transmitting member; a dissolving agent storage unit; a UV irradiation unit; and a measurement unit, wherein: a flocculation solution is stored in the flocculation solution storage unit; the flocculation solution circulates between the flocculation solution storage unit and the flow cell; the measurement unit measures the UV transmittance of the flocculation solution while the dissolving agent in the dissolving agent storage unit is supplied to the flocculation solution storage unit; the miscibility in the oil is calculated from the amount of dissolving agent supplied and a change in the UV transmittance measured by the measurement unit; and the miscibility is calculated based on a time point when the slope of increase in the UV transmittance changes.