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248results about How to "Improve transmittance" patented technology

Array substrate, preparation method thereof, display panel and display device

The embodiment of the invention discloses an array substrate, a preparation method thereof, a display panel and a display device. The array substrate comprises a first underlayer substrate, a fingerprint identification unit, a driving circuit layer and a transparent film layer, and is characterized in that the fingerprint identification unit comprises a photosensitive diode, and the fingerprint identification unit is used for performing fingerprint identification according to light reflected to the fingerprint identification unit via a touch main body; the driving circuit layer is located at the side, which is away from the fingerprint identification unit, of the first underlayer substrate, at least one opening structure is formed in the driving circuit layer and the first underlayer substrate, and the vertical projection of the opening structure on the first underlayer substrate and the vertical projection of the photosensitive diode on the first underlayer substrate have an overlapping area; and the transparent film layer at least fills the opening structure. According to the invention, the photosensitive diode is provided with the transparent film layer above, so that the transmittance of the film layer above the photosensitive diode is improved, the fingerprint identification unit can well receive the light reflected to the fingerprint identification unit via the touch main body, and the detection sensitivity of the fingerprint identification unit is ensured.
Owner:SHANGHAI TIANMA MICRO ELECTRONICS CO LTD

Infrared-radar compatible stealthy material and preparation method thereof

The invention discloses an infrared-radar compatible stealthy material and a preparation method thereof. The material sequentially comprises a low infrared emissivity layer, a radar wave transmission layer, a radar wave absorbing layer and a radar reflecting layer from top to bottom, wherein the low infrared emissivity layer takes an inorganic adhesive capable of bearing high temperature of 1000K or above as a matrix material, takes fibers with infrared emissivity not higher than 0.8 at a wave band of 8 to 15mu m as a reinforcing material, and takes metal or a semiconductor as an auxiliary material; the radar wave transmission layer takes resin as a matrix material and takes continuous fibers with high transmissivity to radar wave of 2 to 18GHz, and high strength as a reinforcing material; the radar wave absorbing layer takes resin containing a nitrile functional group as a matrix material, takes basalt fibers as a reinforcing material and takes a ferrite radar wave absorber as an auxiliary material; the radar reflecting layer takes resin as a matrix material and takes carbon fibers as a reinforcing material. The stealthy material disclosed by the invention is excellent in infrared and radar stealthy performance and is simple in preparation process.
Owner:SICHUAN AEROSPACE TUOXIN BASALT IND +1

Method for preparing YAG transparent ceramics based on improved Isobam gel system

ActiveCN108516818AHigh solid contentImprove transmittanceBall millTransparent ceramics
The invention discloses a method for preparing YAG transparent ceramics based on an improved Isobam gel system. The method comprises the following steps that (1) grinding balls, an organic solvent, adispersing agent A, a sintering additive and ceramic powder are placed into a ball mill tank, ball milling and mixing are carried out to obtain mixed slurry A; (2) the mixed slurry A is dried, sievedand calcined to obtain raw material powder conducted with gel injection molding; (3) deionized water, an Isobam solution, an epoxy resin cross-linking agent, a pH conditioning agent, a dispersing agent B and the grinding balls are added into the ball mill tank, lastly, the raw material powder is added, after preliminary stirring is carried out, and then ball milling and mixing are carried out to obtain mixed slurry B with high solid content; (4) vacuum degassing, injection molding, gel drying and curing and gel discharging are carried out; (5) vacuum sintering, annealing and polishing are carried out on biscuit after gel discharging, and the YAG transparent ceramics are obtained. The provided method for preparing the YAG transparent ceramics based on the improved Isobam gel system has theadvantages that the solid content of the ceramic slurry is improved, the density of the biscuit is improved, the permeability of the YAG transparent ceramics prepared by vacuum sintering is greatly improved, the technology is simple, and the method is conductive to industrialized production.
Owner:XUZHOU NORMAL UNIVERSITY

Dielectric metasurface collimating lens matched with terahertz photoconductive antenna in use

InactiveCN107317117AImprove transmittanceReduce complexity and cumbersomenessAntennasMicrostructurePhason
The invention relates to a terahertz waveband dielectric metamaterial, and aims to design and produce a device with a small size, easy integration and higher transmission efficiency for improving the flexibility of a photoconductive antenna-based terahertz time-domain spectral system, so as to replace a silicon lens and a paraboloidal mirror or a silicon lens and a terahertz lens. A technical scheme is adopted as follows: a dielectric metasurface collimating lens matched with a terahertz photoconductive antenna in use consists of two parts: a substrate layer and a two-dimensional microstructure layer, wherein the substrate layer is an isotropous high-resistance silicon layer with uniform thickness; the substrate layer is used for providing mechanical support for the two-dimensional microstructure layer, and the two-dimensional microstructure layer is also made from high-resistance silicon; the two-dimensional microstructure layer is formed by tetragonal lattices of cylindrical structures in arrangement similar to a concentric annulus way; and the cylindrical structures of different diameters have different modulation depths on phases, and the cylindrical structures on the same ring of the concentric annulus are the same in diameters. The dielectric metasurface collimating lens is mainly applied to design and manufacturing of the device with higher transmission efficiency.
Owner:TIANJIN UNIV

Dye based circularly polarizing film for organic light emitting diodes

The present invention relates to a dye based circularly polarizing film for organic light emitting diodes, which includes a polarized light film made of polyvinyl alcohol and 1/4 wave plate, characterized in that, the polarized light film is color dyeing and spreading through configuring a high dichroism dye. In the absorption wavelength region 500-640 nm, the principal absorption wavelength bandwidth is 80-120 nm and the average monolithic transmittance is 53 -59% in the visible wavelength 380-780 nm. Utilizing the characteristic of the photopic vision phenomena and the green light having the highest luminous efficiency in the OLED tricolor, the color polarized light film is used to confine the wavelength 500-640 nm and replaces the film with no reflection that restrains the full wavelength of the visible light, so the circular polarization sheet which has the contrast with no evident depress is produced and the external quantum efficiency is improved by 25-37%. Jointed on one side of the cellulose triacetated film of the two sides of the polarized light film, anti dazzle or low reflective coating or the film having the two functions, is used to improve the contrast. The invention can improve the luminous efficiency, reduce the electric power consumption and advance the life of the OLED.
Owner:SHINWHA OPLA

Frequency selective surface-based polarization-adjustable terahertz filter

The invention provides a frequency selective surface-based polarization-adjustable terahertz filter. The frequency selective surface-based polarization-adjustable terahertz filter is characterized bycomprising a substrate and at least one frequency selective surface unit, wherein the at least one frequency selective surface unit is fixed on the substrate, is periodically arranged in a two-dimensional way and is used for filtering an incident terahertz wave, the frequency selection unit has a wire in a spiral line shape, and the wire is used for generating resonance with the incident terahertzwave. In the frequency selective surface-based polarization-adjustable terahertz filter, the frequency selection unit has an asymmetric structure due to the wire being in the spiral line shape, so that the characteristic parameters in different polarization directions are different, the central frequency of the filter can deflect, and the problem that the central frequency of an existing symmetric frequency selective filter cannot be adjusted according to a polarization direction of the incident electromagnetic wave is solved; and moreover, the frequency selective surface-based polarization-adjustable terahertz filter has the advantages of high central frequency transmittance, low loss, high selectivity, low cost and the like, and is convenient to fabricate and process, and the central frequency can be adjusted.
Owner:UNIV OF SHANGHAI FOR SCI & TECH

Novel ITO crossover integrated capacitive touch screen and manufacturing method thereof

Disclosed are a novel ITO crossover integrated capacitive touch screen and a manufacturing method thereof. The novel ITO crossover integrated capacitive touch screen comprises a transparent substrate, and a silicon dioxide layer, a niobium pentoxide layer, a black resin layer, an ITO crossover electrode, a first insulation layer, an ITO electrode, a metal electrode, and a second insulation layer sequentially stacked on the transparent substrate. The silicon dioxide layer covers the glass completely, and the niobium pentoxide layer covers the silicon dioxide layer completely. The ITO electrode comprises a capacitive screen driver and a sensing electrode, and is provided with a patterned graphic structure. The capacitive screen driver and the sensing electrode are on the same layer, mutually independent, mutually insulated, and vertical in design. By the reasonable design for the stacked structure and the crossover conductive mode of the capacitive touch screen, the present invention can effectively improve the transmittance of the capacitive touch screen and reduce the visibility of the ITO pattern, and the reliability of the touch screen is further improved. novel ITO crossover integrated capacitive touch screen.
Owner:SHENZHEN BAOMING TECH
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