1580 results about "Reflective layer" patented technology

The invention belongs to the technical field of radar wave-absorbing materials, and discloses a double-sided wave-absorbing broadband stealth composite material and a preparation method thereof. The broadband stealth composite material with the double-sided wave absorbing function comprises a non-metal-based composite material body and at least five metamaterial layers arranged in the thickness direction of the non-metal-based composite material body at intervals. The number of the metamaterial layers is an odd number, a middle metamaterial layer is arranged in the middle of the metamaterial layers in the thickness direction, and the rest metamaterial layers are symmetrically distributed on the two sides of the middle metamaterial layer; the metamaterial layer comprises conductive pattern units which are periodically arranged; the relative dielectric constant of the nonmetal-based composite material body is not greater than 10; the double-sided wave-absorbing broadband stealth composite material does not contain a metal reflecting layer. When electromagnetic waves with the frequency of 1-18 GHz vertically enter the material, the transmissivity of the material is small (smaller than-13 dB, namely smaller than 5%), and meanwhile the material has low reflectivity in a broadband. And the preparation method is simple to operate and easy to realize large-scale production.

Provided in the present invention are a flip light-emitting diode chip and a manufacturing method therefor. The flip light-emitting diode chip comprises: a substrate, and an N-type semiconductor layer, an active light-emitting layer, a P-type semiconductor layer, a current spreading layer, a first insulating layer, a Bragg reflective layer, a metal reflective layer, a second insulating layer, a connection metal layer, a third insulating layer and a bonding pad layer, which are sequentially deposited on the substrate. The connection metal layer comprises a reflective layer and a protective layer that are sequentially arranged from bottom to top; the protective layer comprises a first protective parent layer, a second protective parent layer, and a third protective parent layer that are sequentially arranged from bottom to top, the second protective parent layer comprising n first protective sublayers and second protective sublayers that are periodically stacked, the thicknesses of the first protective sublayers gradually increasing linearly toward the third insulating layer, and the thicknesses of the second protective sublayers gradually decreasing linearly toward the third insulating layer.

The invention discloses double-sided coated glass. The double-sided coated glass comprises a glass substrate, a first coating layer and a second coating layer, the first coating layer is arranged on the front surface of the glass substrate and sequentially comprises an anti-reflection layer, an ultraviolet reflection layer and a middle and far infrared reflection layer from the glass substrate to the outside; the second coating layer is arranged on the back surface of the glass substrate and sequentially comprises a near-infrared reflecting layer and a near-infrared regulation and control layer from the glass substrate to the outside, and the near-infrared regulation and control layer is used for regulating and controlling the reflectivity of the near-infrared reflecting layer. According to the design of the front anti-reflection layer of the double-sided coated glass, through continuous transition of the particle size and the refractive index of nanoparticles, the visible light reflectivity is remarkably reduced, and the light transmittance of the glass is kept to be 85% or above and is superior to that of existing composite coated glass; meanwhile, through the synergistic effect of the ultraviolet reflecting layer, the middle and far infrared reflecting layer and the back near-infrared reflecting layer, the ultraviolet blocking rate can be larger than or equal to 99%, the comprehensive infrared blocking rate can be larger than or equal to 90%, and the technical problem that light transmission and blocking performance of traditional glass are difficult to consider at the same time is solved.

The invention discloses a composite heat insulation coating structure and method for a high-temperature component of an unmanned aerial vehicle. The structure comprises a heat insulation base material layer made of a high silica glass fiber material and a reflecting layer made of metal foil, and the heat insulation base material layer and the reflecting layer are compounded into a whole. The reflecting layer is used for reflecting heat radiation, and the heat insulation base material layer is used for blocking heat conduction. The problems that a traditional ceramic fiber material is prone to embrittlement and short in service life in a high-temperature vibration environment are effectively solved through a double heat insulation mechanism of reflection-blocking. The coating structure has excellent heat-resistant cyclicity, good flexibility and process adaptability, can perfectly fit special-shaped structures such as a bulkhead and a tail cover of the unmanned aerial vehicle, and remarkably improves the reliability and prolongs the service life of a thermal management system of the unmanned aerial vehicle.

The utility model discloses an optical waveguide assembly, a near-to-eye display device and an optical device, the optical waveguide assembly comprises a composite layer, a grating and a reflecting layer, the composite layer comprises a plurality of dielectric layers, the dielectric layers comprise a first dielectric layer located on the surface layer, and a total reflection area is at least formed in the first dielectric layer; the gratings are arranged on the same side of the first dielectric layer, the coupling-in grating is used for coupling incoming light into the total reflection area to form total reflection propagation, and the coupling-out grating is used for coupling at least one part of the light in the total reflection area out of the composite layer; the reflecting layers are selectively arranged in a plurality of areas on the outer side surface of the first dielectric layer and used for reflecting light rays of the total reflection area so that the light rays can continue to be transmitted along a total reflection path, and the reflecting layers of at least one area are arranged at intervals. According to the optical waveguide assembly disclosed by the utility model, external light can be transmitted to the composite layer on the premise that light can be propagated in a total reflection manner through the reflecting layers arranged at intervals, so that the lighting effect and the contrast display effect are ensured.

The invention relates to a reflective panel 1 comprising a carrier element 10 and a reflective element 20. The carrier element 10 and the reflective element 20 are connected to each other by means of an adhesive layer 30. The reflective element 20 has a reflective layer 21 facing the adhesive layer 30 and a transparent cover layer 22 facing away from the adhesive layer 30.

The invention relates to the technical field of layered products, and particularly discloses a skin material for wave-absorbing hiding and a preparation method. The skin material is of a layered structure and comprises a bionic micro-forest wave-transparent layer, a gradient transition layer, a wave-absorbing layer with a'skeleton-matrix 'dual-network structure, a reflecting layer and a heat-insulating layer which are sequentially arranged from top to bottom. A micro-cone array is arranged on the surface of the bionic micro-forest wave-transparent layer, so that broadband impedance matching is realized; the wave-absorbing layer comprises a three-dimensional ceramic skeleton and a magnetic-dielectric composite matrix filled in pores of the skeleton, and magnetic absorbents in the wave-absorbing layer are directionally arranged in the layer plane direction through a magnetic field auxiliary technology. The skin material prepared by the invention has excellent comprehensive performance of ultra-wideband wave absorption, high mechanical strength, light weight and high temperature resistance, and is particularly suitable for stealth requirements in the field of aerospace.

The utility model relates to the technical field of visible light communication, and discloses a visible light communication emission head, which comprises a reflection cup, the reflection cup comprises an inner cavity with a gradually increased opening, and the surface of the inner cavity is provided with a reflection layer; the light source is arranged at one end, with a narrower opening, of the inner cavity; the first convex lens is arranged at one end of the reflection cup and covers the light source; the second convex lens is arranged at the other end of the reflection cup; light emitted by the light source sequentially penetrates through the first convex lens, the inner cavity and the second convex lens and then irradiates outwards. The utility model aims to provide the visible light communication transmitting head which is compact in structure, low in cost, long in transmission distance and suitable for long-time operation.

The utility model discloses a wear-resistant reflective zipper, which relates to the technical field of reflective zippers, and comprises a base cloth, the base cloth comprises a lining body cloth and a reflective part, the lining body cloth and the reflective part are interlaced and woven with each other, the reflective part consists of a plurality of reflective fibers, and the reflective fibers further comprise matrix fibers and bonding layers coated on the outer surfaces of the matrix fibers. The reflective effect is achieved through the high refractive index of the polymer type reflective glass beads, and the tin film layer arranged at the bottom of the polymer type reflective glass beads can further reflect external light and diffused light generated by the polymer type reflective glass beads, so that the reflective effect of the zipper is further improved; the polymer type reflective glass beads are tightly combined with the reflective layer through strong electrostatic attraction force, the reinforcing layer and the wear-resistant layer which are arranged in a matched mode have a good wear-resistant effect, the service life of the reflective zipper can be further prolonged, the falling speed of the polymer type reflective glass beads is greatly delayed, and the service life of the zipper is prolonged. And the reflective zipper can have a good reflective effect for a long time.

A reflective display panel including a first substrate, a second substrate, a liquid crystal layer, a pixel driving layer, a color filter layer, and a polarizer. The pixel driving layer is provided with a reflective layer overlapping the color filter layer. Absorbance of a first filter pattern of the color filter layer is greater than or equal to 0.25 and less than or equal to 0.9 in a wavelength range between 530 nm and 580 nm. Absorbance of a second filter pattern of the color filter layer is greater than or equal to 0.8 and less than or equal to 1.25 in a wavelength range between 630 nm and 680 nm. Absorbance of a third filter pattern of the color filter layer is greater than or equal to 0.95 and less than or equal to 1.3 in a wavelength range between 580 nm and 630 nm.

The invention discloses a polarization sensitive type broadband absorber based on metal-medium stacking, and relates to the technical field of micro-nano photonic devices and infrared detection. The absorber sequentially comprises a bottom-layer high-loss metal reflecting layer, a multi-layer stacked composite dielectric cavity structure and a top-layer sub-wavelength metal grating from bottom to top, according to impedance matching and interference resonance theories, a broadband absorption substrate is constructed through a multi-layer film structure at the bottom, and light energy is converted into heat energy by utilizing the high loss characteristic of bottom layer metal; plasmon resonance is excited through the top metal grating, the coupling efficiency of TM polarized light is enhanced, and TE polarized light is cut off; the above structural design successfully realizes efficient broadband absorption and high polarization extinction ratio in an infrared band. The structure is simple in design, is compatible with a CMOS technology, and has excellent wide-angle stability. And meanwhile, polarization screening can be realized without an external polaroid, and miniaturization and integration of an infrared detection system are facilitated.

The invention discloses an infrared and ultraviolet flame detector with multiple safety redundancy and an anti-explosion control method, and relates to the technical field of flame detection, and the anti-explosion control method comprises the steps: S1, obtaining the multi-source fire data of a target object through a signal obtaining module; s2, analyzing the multi-source fire data through a dynamic coupling adjustment module; s3, performing time domain association verification on the first monitoring data through a time domain continuity verification module, and generating second monitoring data; and S4, the grading execution module sends an alarm signal according to the second monitoring data and adopts grading execution processing. Through ultraviolet polarization degree and dielectric constant dual-threshold triggering, interference of the metal reflective layer is stripped, so that the smoldering detection rate of a covered scene is increased from less than or equal to 60% to more than or equal to 95%; and moreover, the smoldering authenticity is subjected to cross validation through the bidirectional verification module, so that the problem of missing report of a traditional flame detector caused by a covering effect of'reflective interference 'on'smoldering monitoring' is avoided.

A display panel includes first and second light-emitting elements including a first electrode including a reflection layer and a metal oxide layer, an emission unit configured to generate first, second, and third color light, and a second electrode above the emission unit, the metal oxide layer of the second light-emitting element being thicker than the metal oxide layer of the first light-emitting element, wherein a difference between respective distances from an upper surface of the reflection layer of the first electrode to a lower surface the second electrode in the first and second light-emitting elements is substantially equal to a difference between a thickness of the metal oxide layer of the first light-emitting element and a thickness of the metal oxide layer of the second light-emitting element.

A reflective optical element (101) for grazing incidence of radiation with a working wavelength from the EUV wavelength range is proposed, comprising a reflective layer (107) on a substrate (103), wherein a filter layer (105) is arranged between the reflective layer (107) and the substrate (103), the filter layer (105) having a larger real part of the refractive index in the DUV wavelength range than the reflective layer (107).

An optical communication receiver system for a mobile platform includes: a surface having an entrance aperture for entry of an optical communication signal from a remote source; an optical receiver to receive the optical communication signal through the entrance aperture; a reflective layer over at least a portion of the surface to at least partially reflect an alignment beam that is substantially coincident with the optical communication signal; a camera positioned to detect the reflected alignment beam; a processor to determine alignment information about the alignment beam relative to the entrance aperture based on the reflected alignment beam detected by the camera; and a transmitter to transmit the alignment information to the remote source to enable the remote source to center the optical communication signal in the entrance aperture.

A light-emitting diode includes an epitaxial stack, a dielectric layer, a metal reflective layer, a substrate, and an oxide protective layer. The epitaxial stack sequentially includes a first semiconductor layer, a light-emitting layer, and a second semiconductor layer along a direction from an upper surface to a lower surface. The dielectric layer is disposed on the lower surface of the epitaxial stack and has multiple through-holes. The metal reflective layer is disposed on a side of the dielectric layer facing away from the epitaxial stack and electrically connected to the epitaxial stack through the through-holes. The substrate is disposed on a side of the metal reflective layer facing away from the epitaxial stack. The oxide protective layer covers a sidewall of the metal reflective layer. Thus, metal migration of the metal reflective layer can be effectively prevented, leakage current can be avoided, and the product quality can be improved.

The invention discloses a flexible laser backlight plate and a preparation method, and relates to the technical field of laser display, the flexible laser backlight plate comprises a volume scattering particle composite layer, a reflecting layer, a light guide main body layer and a connecting end, and an optical fiber side light leakage optical fiber group is arranged in the light guide main body layer; the connecting end is arranged at one end of the backlight plate and provided with a light inlet end face corresponding to the light inlet end of the optical fiber side light leakage optical fiber set. In the optical fiber side light leakage optical fiber group, the side leakage structures of the optical fibers are non-uniformly distributed along the length direction of the optical fibers, and preset brightness distribution can be formed in the light guide main body layer, so that the preset brightness distribution can be formed and kept on the light emitting surface of the flexible laser backlight plate in a bent or flattened state; the problems of light path change and uneven brightness caused by flexible deformation are effectively solved.

The invention provides a display device and a preparation method thereof, and belongs to the technical field of semiconductors. The display device comprises a driving back plate, an insulating reflecting layer, an electrode layer and a plurality of pixel units, the plurality of pixel units are respectively bonded on the driving backboard, the plurality of pixel units are arranged at intervals, each pixel unit comprises an epitaxial layer and a passivation layer, the epitaxial layer comprises a first semiconductor layer, an active layer and a second semiconductor layer which are stacked in sequence, and the passivation layer covers the side surface of the epitaxial layer; the insulating reflecting layer covers one side, far away from the epitaxial layer, of the passivation layer, and a groove is formed between every two adjacent pixel units; the electrode layer is located in the groove. According to the invention, the problem of low occupation ratio of small-angle light extraction efficiency of a single pixel unit can be effectively solved.

A backlight module, including a light-emitting unit, emergent light of which passes through a packaging layer and then is transmitted to a surface of a first reflective layer, then passes through the surface of the first reflective layer and passes through the packaging layer again, enters a light-transmitting substrate from the packaging layer, and is emitted from the side of the light-transmitting substrate distant from the light-emitting unit. The thicknesses of the packaging layer and the light-transmitting substrate are effectively utilized to increase an optical path, thereby reducing the thickness of the backlight module. The first reflective layer is Lambertian. The side of the first reflective layer near the light-transmitting substrate and the side distant from the light-transmitting substrate allow the emergent light transmitted to the surface thereof to be scattered and homogenized to increase the optical path again, and can also function as diffusor plates.

The utility model relates to the technical field of backlight of display equipment, and provides a CSP backlight source and a display device. The CSP backlight comprises: a substrate comprising a light emitting circuit; the light-emitting packaging part is arranged on the substrate, electrically connected with the light-emitting circuit and comprises a blue light chip and a red-green fluorescence conversion layer which are sequentially stacked from bottom to top, and the red-green fluorescence conversion layer at least covers the blue light chip and is used for converting and mixing light emitted by the blue light chip so as to emit white light; the light-emitting packaging piece is manufactured through a chip scale package (CSP) technology; the diffusion reflection layer covers the light-emitting packaging piece in a gapless mode, the diffusion reflection layer comprises a cup-shaped diffusion part and a reflection part arranged on the periphery of the diffusion part, and the diffusion powder concentration of the central area of the diffusion part is larger than that of the edge area of the diffusion part; and the lens covers the diffusion reflection layer in a gapless manner.

An organic light-emitting apparatus includes a pixel including a first sub-pixel and a second sub-pixel, each sub-pixels including: a reflective layer and a first electrode. covering the reflective layer. In the first sub-pixel, the drive circuit and the first electrode are electrically connected to each other via a conductive plug. The first electrode of the first sub-pixel is different in thickness from the first electrode of the second sub-pixel.

The application provides a kind of laminated glass and vehicle, can ensure that the appearance color difference of laminated glass is smaller under different observation angles, ensure the consistency of the overall appearance color of vehicle.Laminated glass includes outer sheet glass, inner sheet glass, infrared reflection layer and adhesive layer, adhesive layer is arranged between outer sheet glass and inner sheet glass, outer sheet glass includes oppositely arranged first surface and second surface, inner sheet glass includes oppositely arranged third surface and fourth surface, third surface faces second surface, infrared reflection layer is arranged on second surface;Laminated glass has the maximum chromatic aberration C max ≤3.5 in the range of incident angle θ 10°≤θ≤80°.

The invention belongs to the technical field of magnetic field shielding, and discloses an electromagnetic wave absorbing material and device. The electromagnetic wave absorbing material provided by the invention comprises a first skin glass fiber reinforced plastic, a core layer medium, an impedance metamaterial, a second skin glass fiber reinforced plastic and a reflecting layer which are sequentially arranged from top to bottom, the impedance metamaterial comprises a dielectric film and two hollowed-out surface impedance metamaterial layers with different periodic structures, wherein the two hollowed-out surface impedance metamaterial layers are located on the front face and the back face of the dielectric film. The electromagnetic wave absorbing device provided by the invention comprises the electromagnetic wave absorbing material. The high-strength wave-absorbing material has high structural strength and also has relatively good wave-absorbing performance.

The present disclosure provides an omnidirectional ceiling antenna and an electronic device, and belongs to the technical field of communication. The omnidirectional ceiling antenna comprises a reflecting plate and a radiation structure arranged on the reflecting plate; the plane where the reflecting layer and the radiation structure are located has a certain included angle; the radiation structure comprises a first dielectric substrate and a radiation component arranged on the first dielectric substrate, and the radiation component comprises a radiation part; wherein the radiation part has at least one first slot part, and the orthographic projection of the first slot part on the first dielectric substrate is in a spiral shape; and / or the radiation component further comprises at least one first stub arranged on the first dielectric substrate and coupled with the radiation part.

The invention relates to the technical field of semiconductor packaging, in particular to a Micro-LED packaging structure and a manufacturing method thereof, and the packaging structure comprises a substrate, a color filter layer, a color conversion layer, an inorganic layer, a chip bonding layer, a micro light-emitting diode layer, a first filling layer, a reflecting layer and a second filling layer from bottom to top. And grinding, thinning, cutting and splitting the substrate to form an independent discrete device. By arranging the reflecting layer covering the packaging structure and the discontinuous chip bonding layer, light emitted by the quantum dots and the micro light-emitting diodes is reflected by the reflecting layer, and light crosstalk between the packaging structures is avoided. The first filling and leveling layer with the slope surface is arranged between the reflecting layer and the micro light-emitting diode, so that the side light-emitting path is kept away from the micro light-emitting diode body, and the light-emitting efficiency is improved. The micro light-emitting diodes are arranged in an offset mode, so that top damage is prevented when the packaging structure is transferred. The packaging structure has the advantages of preventing optical crosstalk and facilitating mass production of laser cutting while improving the lighting effect and preventing damage.

The invention discloses a high-efficiency ultraviolet light source and a packaging method thereof. The ultraviolet light source comprises a substrate, an ultraviolet LED chip and a light window, an inner electrode layer and a welding layer are arranged on the upper surface of the substrate, and the ultraviolet LED chip is welded on the inner electrode layer; the light window comprises a lens and an integrated tube shell; the integrated tube shell comprises a surrounding shell arranged around the ultraviolet LED chip and a reflection cup located on the inner side of the surrounding shell and arranged around the ultraviolet LED chip. A horizontal part extending outwards is arranged at the lower end of the surrounding shell, and the bottom surface of the horizontal part and the welding layer of the substrate are sealed and welded together; the upper surface of the reflection cup is constructed to be a reflection surface which is gradually raised from inside to outside, and a reflection layer is arranged on the reflection surface; the surrounding shell and the reflection cup are integrally formed, a downward-concave welding flux groove is formed in the connecting position of the surrounding shell and the reflection cup, a welding flux ring is arranged in the welding flux groove, and the edge of the lower surface of the lens is pressed on the welding flux ring and welded and fixed. The invention has the advantages of low light loss and high light extraction efficiency.

The application provides a transparent antenna, a scheduling method of automobile glass and a vehicle. The transparent antenna comprises a signal circuit and a first protective layer, an antenna oscillator, a base layer, a reflecting layer and a second protective layer which are sequentially stacked. The material of the base layer is fluororesin. The material of the antenna oscillator is graphene. The antenna oscillator is formed by arranging a plurality of etched antenna components. The reflecting layer covers at least the antenna components. Each antenna component has a lead-out part which is electrically connected to the signal circuit. The application realizes the arrangement of the transparent antenna in the automobile glass, facilitates the assembly of the vehicle signal line and does not affect the driving field of vision of the vehicle driver.

The invention relates to a pane (101) for an illuminable glazing element (102), comprising: - an optical waveguide (4) for guiding visible light (5), having an inner surface (IV) and an outer surface (III), and - a layer stack (100) comprising - an optically clear adhesive layer (1) having an outer side (1.1) and an inner side (1.2), and - a reflective structure (2) having an inner side (2.1) facing the adhesive layer (1) and an outer side (2.2) facing away from the adhesive layer (1), wherein the reflective structure (2) is applied with its inner side (2.1) flat on the inner side (1.2) of the adhesive layer (1), and - a reflective layer (3), wherein the reflective structure (2) has a multiplicity of sloping surfaces (F) on its outer side (2.2), and the reflective layer (3) is applied to the sloping surfaces (F), and wherein the layer stack (100) is applied with the outer side (1.1) of the adhesive layer (1) on the outer surface (III) of the optical waveguide (4), characterized in that the refractive index of the adhesive layer (1) is greater by 0.005 to 0.040 than the refractive index of the optical waveguide (4).

The invention provides a real-time dark light enhancement method for an unmanned subway train, and the method comprises the steps: collecting operation and maintenance scene data of the unmanned subway train, so as to obtain an original image; training a dark light enhancement model based on deep learning; a reflection layer and an illumination layer are iteratively optimized for multiple times by training a deep neural network, and image enhancement in a low-light environment is performed on the unmanned subway operation and maintenance scene data so as to acquire an image after dark light enhancement; and comparing the original image with the image subjected to dark light enhancement by adopting an RGB (Red, Green and Blue) search mode, and extracting a corresponding relation of R, G and B channels. Compared with a dark light enhancement model based on deep learning, the real-time dark light enhancement method for the unmanned subway train provided by the invention learns a mapping rule of dark light enhancement through an RGB lookup table mode, realizes real-time dark light enhancement by reducing the calculation amount, and improves the real-time dark light enhancement efficiency. Therefore, the method can efficiently operate on a subway train computer system with limited computing resources.

The invention belongs to the technical field of light emitting, and particularly relates to a side-in type backlight module which comprises a circuit substrate, lamp panels, a light emitting chip, a light uniformizing piece and a light uniformizing unit, the lamp panels are arranged on one side of the circuit substrate and are perpendicular to the circuit substrate, a plurality of grids are defined by the multiple lamp panels on the surface of the circuit substrate, and the light emitting chip is arranged on the light uniformizing piece. One surface of the circuit substrate close to the lamp panel is coated with a reflecting layer; the light-emitting chips are arranged on the surface of the lamp panel, at least one light-emitting chip is arranged in each grid, and the circuit substrate and the light-emitting chips are electrically connected through the lamp panel; the grids are wrapped and clamped by the dodging sheet and the circuit substrate, a plurality of dodging units are arranged on the side, close to the circuit substrate, of the dodging sheet, the dodging units and the grids are embedded into the grids in a one-to-one correspondence mode, and the dodging sheet is positioned. The backlight module has the effect that positioning between the dodging sheet and the backlight source is more stable and accurate.