138results about How to "Reduce reflective effect" patented technology

A light-emitting device includes a substrate, a first nitride semiconductor stack formed on the substrate, a nitride light-emitting layer formed on the first nitride semiconductor stack, a second nitride semiconductor stack formed on the nitride light-emitting layer, and a first transparent conductive oxide layer formed on the second nitride semiconductor stack. The second nitride semiconductor stack includes a plurality of hexagonal-pyramid cavities formed in an upper surface of the second nitride semiconductor stack. The plurality of hexagonal-pyramid cavities of the second nitride semiconductor stack are filled with the first transparent conductive oxide layer, and a low-resistance ohmic contact is generated at the inner surfaces of the plurality of hexagonal-pyramid cavities so as to decrease the operation voltage and improve light-emitting efficiency of the light-emitting device.

The invention discloses a vehicle video identification and speed measuring method. The concrete steps are as follows: (a). obtain a vehicle picture; (b). search the partial threshold value of vehicle license plate on the vehicle picture to obtain the license picture; (c). redress the inclination of the license picture; (d). search the frame of the license plate on the redressed picture and calculate the height of characters; (e). standardize characters on the license plate to obtain a number of partial blocks; (f). carry out the binary system for the partial blocks of each character to obtain two-digit pictures; (g). identify characters on the two-digit pictures to obtain characters on the license plate; (h). track the moving route of the license plate through results of step b and d; (i). calculate the moving distance of the vehicle body; and (j). calculate the running speed. The invention has the advantages of high precision of identifying vehicle licenses and low impact on light reflection of license plate, easy realization, and high practical value.

The present invention provides power saving methods by replacing termination resistors used to support SSTL DRAM interfaces with RC termination circuits; the RC termination circuits consumes significant less power relative to prior art termination resistors at low frequency and behave as a matching impedance at high frequency. Similar methods and structures are also applicable for PCIe, SATA, or MIPI differential interfaces.

Apparatus and methods for shaping a surface of a material are described. An example method comprises providing one or more shaping elements, softening the material, and urging the one or more shaping elements against the material so as to form one or more grooves in the material. The configuration of shaping elements can be adjusted to provide a desired pattern of grooves in the surface. The method can be applied to inorganic crystals in a high temperature plastic state, avoiding the problems associated with conventional sawing techniques.

The invention relates to a method for making fog face release paper, which mainly comprises the following steps of: a first step of laminating a laminated layer on one lateral surface of body paper of the release paper by a laminating machine and cooling; a second step of coating a layer of fog face release agent on the laminated layer; and a third step of drying the fog face release agent. A rawmaterial formula of the fog face release agent comprises 25 to 35 percent of hydroxyl silicone oil, 0.5 to 4 percent of curing agent, 2 to 8 percent of catalyst, 15 to 55 percent of polyurethane adhesive, 0.3 to 5 percent of fumed silica and 10 to 50 percent of filler, wherein the curing agent is methyl hydrogen silicone fluid; the catalyst is platinum; and the filler is talcum powder of which the practical diameter is less than or equal to 15 microns. The method disclosed by the invention has simple production process and is convenient to operate. The cost is reduced. The concave-convex surface of laminated paper is filled and leveled up by the release agent mixed with a fog agent. The fog face release paper which has stable stripping strength and ensures the adhesive surface of a pressure sensing adhesive to have a good haze effect can be produced, so that the adhesive surface has a low-reflection effect.

A method of detecting an unknown signal and estimating a source location of the unknown signal using aircraft based on an automatic dependent surveillance-broadcast (ADS-B) system is provided. The method includes a first step (S100) for obtaining from a plurality of airborne aircrafts provided with a network system, aircraft signals transmitted to an air traffic control (ATC) and a second step (S200) for detecting, by the ATC, a presence of an unknown signal in the aircraft signals based on one of a time difference of arrival (TDOA) method, a time of arrival (TOA) method, and an angle of arrival (AOA) method. The method further includes a third step (S300) for estimating the source location of the unknown signal and a fourth step (S400) for transmitting unknown signal generation information associated with the unknown signal and the source location of the unknown signal to neighboring aircraft and the ATC.

The invention, which belongs to the vacuum electronic technology field, relates to an input / output structure of a broadband phase shift travelling wave tube. The structure comprises six parts of waveguide type elements: a first double-ridge loading rectangular wave guide; a double-ridge loading rectangular wave guide, which is in a bending state of 90 degrees; a second double-ridge loading rectangular wave guide; a double-ridge gradient double-ridge loading rectangular wave guide; a first rectangular wave guide and a second rectangular wave guide. The first double-ridge loading rectangular wave guide and the second double-ridge loading rectangular wave guide are respectively connected with two ends of the double-ridge loading rectangular wave guide that is in a 90 degree bending; the double-ridge gradient double-ridge loading rectangular wave guide is connected between the second double-ridge loading rectangular wave guide and the first rectangular wave guide; and the second rectangular wave guide is connected with an outboard curved surface window of the double-ridge loading rectangular wave guide that is in a 90 degree bending, wherein a central axis of the double-ridge loading rectangular wave guide that is in a 90 degree bending is superposed with a central axis of the first rectangular wave guide. According to the invention, broadband microwave signal energy and a band shape electronic beam can be well introduced and a sine wave guide structure can be lead out; besides, the input / output structure is simple and is easy to process and realize.

A light emitting device with optical enhancement structure. The light emitting device includes a light emitting element and an optical enhancement structure. Some of the light from the light emitting element is emitted in a diverging manner. The optical enhancement structure is optically coupled to the light emitting element, said optical enhancement structure having a light emerging surface that includes a central surface that is orthogonal to the normal and corner surfaces having profiles that are not orthogonal to the normal. The optical enhancement structure is a single structure for changing the normal angle of the first light emerging surface to increase light output efficiency. The optical enhancement structure have an optical characteristic that directs diverging light from the light emitting element along a path within the optical enhancement structure in a direction towards a normal of the pixel.

The invention provides a method for reducing the influence of base reflection through an exposure auxiliary graph. The method comprises the following steps: classifying ion implanted layer layout graphic boundaries according to the distances from a photoresist boundary to a front layer active region layer and a polysilicon layer within a photoresist opened region, classifying the ion implanted layer layout graphic boundaries with the distance smaller than or equal to a distance threshold as a first class, and classifying the ion implanted layer layout graphic boundaries with the distance greater than the distance threshold as a second class; adding an auxiliary graph with a second size to the second class of ion implanted layer layout graphic boundaries, which can expose a graph on a silicon wafer; adding an auxiliary graph with a first size on the first class of ion implanted layer layout graphic boundaries, which cannot expose a graph on the silicon wafer.

The invention discloses a wireless positioning and protection method for a railway worker. Through a positioning label worn by the worker and the flying time of ultra narrow pulse electromagnetic waves transmitted between positioning base stations arranged at two sides of a railway in the air, the position of the positioning label is solved through a positioning solution server, coordinates of the worker are thus positioned, and the coordinates are displayed in real time; and once the coordinates of the worker deviate from an operation area and enter an alarming area, the positioning solution server instantly outputs early warning signals, the positioning label gives an alarm, and the worker timely receives the alarm and quickly leaves the alarming area. The accurate position coordinates of the worker can be acquired in real time; once the worker enters the alarming area, the positioning solution server instantly transmits control signals automatically, the positioning label timely gives an alarm, the worker entering the alarming area can obtain the safety alarm at the first time and leaves instantly, and the safety is high.

The luminous element includes following parts: a base plate; a semiconductor lamination of first nitride formed on the base plate; luminous layer of nitride formed on the semiconductor lamination of first nitride; a semiconductor lamination of second nitride formed on the luminous layer of nitride. There is a structure of cone-shaped cavity in form of hexagonal socket on surface of luminous layer of nitride opposite to semiconductor lamination of second nitride. Through the said structure, the enucleation efficiency of luminous element is raised.

The invention provides an array antenna structure for a millimeter wave imaging system. The array antenna structure for the millimeter wave imaging system comprises a metal cavity, a transmitting antenna array and a receiving antenna array, wherein the transmitting antenna array and the receiving antenna array are located on the same side of the metal cavity in a spaced mode. The array antenna structure further comprises a U-shaped metal isolation structure. The U-shaped metal isolation structure is fixed to the portion, between the transmitting antenna array and the receiving antenna array, of the metal cavity. According to the array antenna structure for the millimeter wave imaging system, the absorptive metal isolation structure is utilized, so that the coupling between a receiving channel and a transmitting channel is obviously reduced, the imaging quality of the imaging system is good, the structure is stable, cost is low, and implementation is easy.

Disclosed is a film material for PE coated paper. Raw material formula of the film material is composed of 71.2-90.8% of a polymer, 0.2-1.2% of a lubricant and 9-27.6% of a fogging filler, wherein the polymer is selected from the group consisting of polyethylene, polypropylene, PVC and PET; and the filler is solid particles with the particle size being 3-20 micrometers. A fogging-surface release film with stable release force and good pressure-sensitive adhesive surface fogging effect can be produced, thus reaching low reflection effect of transfer adhesive surface. The production technology is simple, equipment investment cost is low and equipment is convenient to operate.

A luminous element with high luminous efficiency includes a substrate, a first nitride semiconductor lamina formed on said substrate, a nitride luminous layer formed on it, a second nitride semiconductor lamina formed on the nitride luminous layer, among which, said second nitride semiconductor lamina has multiple downward socket taper holes corresponding to the surface of the nitride luminous layer, an oxide transparent conductive layer formed on the second lamina and the inside surfaces of the socket taper holes of said oxide layer and the second lamina form low resistance ohm contact to reduce the operation voltage of the luminous element and increase the luminous efficiency.

Provided are a content detection method and a content detection device of an image highlight area, and a detection method and a detection device of the image highlight area. The content detection method of the image highlight area comprises confirming a highlight impact factor of each pixel in the highlight area, wherein the highlight impact factor indicates intensity of influence of the highlight area to pixel content; and detecting content in the image highlight area based on the highlight impact factor of the pixel in the image highlight area. The detection method of the image highlight area comprises obtaining a diffuse reflection image from an original image; obtaining intensity difference between each pixel in the original image and each pixel of the diffuse reflection image; confirming an intensity difference threshold value in a self-adaption mode; and detecting the image highlight area according to the intensity difference threshold value and the intensity difference of each pixel.

The invention discloses a double-end traveling wave method-based medium-voltage distribution network cable short circuit fault positioning method. The method comprises the following steps of: 1, acquiring grounding current of an M end and an N end of a faulty cable; 2, extracting time tM and tN of two fault feature current traveling waves for correspondingly reaching the M end and the N end of thefaulty cable, and extracting arrival time tMr and tNr of first reflection waves at the M end and the N end of the two fault feature current traveling waves; and 3, calculating a distance normalization value dpu of a monitoring point from a fault point to the M end or N end of the faulty cable, and obtaining a position of the fault point on the faulty cable according to the size of the dpu. The method is capable of overcoming the synchronization problem of existing double-end traveling wave ranging and decreasing dependence on correct electric parameters of cable circuits, so as to greatly decrease the positioning error and reduce the influences, on refraction and reflection of fault feature current, of impedance-mismatched positions of circuits.

The invention relates to matte release paper, comprising a substrate, wherein coating material is coated on the surface of at least one side of the substrate, raw material formula of the coating material comprises 71.2-90.8% of polymer, 0.2-1.2% of lubricating agent and 9-27.6% of fogging filler; the polymer is selected from polyethylene, polypropylene, PVC (polyvinyl chloride) and PET (polyethylene terephthalate); and the filler is solid particles with particle size of 3-20 microns. According to the invention, the matte release paper with stable release force and a pressure sensitive adhesive surface having a good haze effect can be produced, thus an adhesive moving surface can achieve low reflective effect. The matte release paper has the advantages that the production process is simple, equipment investment cost is low and operation is easy to carry out.

The invention discloses a mist-surface release agent, which consists of the following components: 25 to 35 percent of hydroxy silicone oil, 0.5 to 4 percent of curing agent, 2 to 8 percent of catalyst, 15 to 55 percent of polyurethane adhesive, 0.3 to 5 percent of aerosol and 10 to 50 percent of filler. The curing agent is methyl hydrogen polysiloxane oil; the catalyst is platinum; and the filler is talcpowder of which the particle diameter is less than or equal to 15 micrometers. The mist-surface release agent has stable stripping strength and makes the adhesive surface of a pressure sensitive adhesive have a good haze effect, and the adhesive surface has a low reflection effect.

The invention relates to an RCS evaluation carrier for vertical polarized waves. The RCS evaluation carrier is composed of a metal frame structure and a metal skin wrapping the metal frame structure. The overall appearance of the RCS evaluation carrier is in a flat cone shape, and the RCS evaluation carrier comprises a top face and a bottom face. The top surface adopts a rhombic design; the bottom surface is a smooth arc-shaped curved surface; the head part and the tail part of the RCS evaluation carrier are pointed cones, and the middle part of the RCS evaluation carrier is an arc-shaped transition section; and the pointed cone at the tail part of the RCS evaluation carrier is designed to be bent downwards. The RCS evaluation carrier solves the problem of RCS evaluation of aircraft parts under the irradiation of the vertical polarized waves; the RCS evaluation carrier can have very low backscattering within the azimuth angle of 0-50 degrees, the mean value reaches the magnitude of-50 dBm < 2 >, and in the angular domain, the low-backscattering carrier is combined with a component for use, so that the accurate vertical polarization RCS of the component can be obtained.

The invention relates to a waterproofing membrane (1) comprising a structure incorporating a fiber layer (10) and carrying a bituminous mass (15) on one side, the other side carrying a layer (20) of a first substance comprising between 10% and 40% by dry weight of an acrylic polymer mixed with between 4% and 40%, preferably between 20% and 40%, by dry weight of titanium dioxide and at least 1% by dry weight of a transparent or translucent hydrophobic material, said layer (20) defining a surface (S) of said membrane (1).

The present invention relates to a plastic film having a light extinction effect, wherein the plastic film comprises, by weight, 23-35 parts of low density polyethylene, 10-15 parts of high density polyethylene, 48-65 parts of linear low density polyethylene, 1-1.5 parts of an opening agent, and 1-1.5 parts of a lubricant. The present invention further provides a preparation method of the plastic film having the light extinction effect. The plastic film of the present invention has effects of no dazzling under light irradiation, reflection light weakening and the like. In addition, the preparation method of the present invention is simple and easy to operate.

The embodiment of the invention, which relates to the field of the organic light-emitting diode (OLED) technology, provides an organic light-emitting diode, an illuminating apparatus, and a display apparatus. On the basis of improvement of the light extraction rate of the OLED device, the number of interfaces which the emitted light passes through can be reduced, thereby reducing the light losses. The organic light-emitting diode comprises a substrate and a light-emitting structure carried by the substrate. The substrate arranged at a light extraction side of the light-emitting structure includes a substrate body and a micro structure that is arranged at the surface of the substrate body and is integrated with the substrate body. Application to the OLED device manufacture is realized.

The interface circuit includes n buffer circuits, switches for connecting an external pin of a tester to input nodes of n buffer circuits and connecting output nodes of n buffers respectively to n DUTs when a signal is provided from the tester to n DUTs, and successively connecting n DUTs to the external pin of the tester by a prescribed time period when voltage-ampere characteristics of n DUTs are measured. Therefore the number of devices that can be measured by the tester at a time can be increased by n times. As a result, the test cost can be reduced and the test accuracy can be improved.

The invention takes symmetrical 1,3,4-thia / oxadiazole as a core group, and a rigid group with relatively great electronic cloud density is bridged on sites 2,5, so that a compound with a high refractive index is formed. The compound is taken as the light take-out layer material to cover an apparatus on a cathode to modify, so that loss, caused by total reflection and light wave guide effect and the like, on the inner part of the apparatus, of light is further improved, and therefore, reduction, caused by heat accumulation, of the apparatus service life and stability is avoided, and light take-out efficiency is improved.

The invention relates to a novel surface roughening method for a GaN-based light emitting diode and the method is capable of improving light extraction efficiency. The method comprises the steps of growing N-type GaN material, a light emitting active layer and P-type GaN material on a substrate; depositing a layer of P-type transparent electrode used for ohmic contact on P-type material; preparing a layer of SiO2 nanospheres on the transparent electrode; taking the SiO2 nanospheres as a mask etching P-type transparent electrode, cleaning and removing residual SiO2 nanospheres and obtaining a LED device with a roughened light emitting surface. According to the invention, light extraction efficiency of the diode can be effectively improved. In addition, preparation method is simple, process is easy to control, and therefore the novel surface roughening method for the GaN-based light emitting diode is suitable for mass production with no special requirements for growth equipment and process conditions.

A driver circuit drives a write element for magnetic recording, and permits high speed recording while preventing noise from entering an adjacent read element. An H bridge circuit, which causes a write current to flow, in accordance with a write drive signal, in a write coil of the write element, is provided with an overshoot circuit, in which positive and negative power sources are of the same potential. It makes a flyback voltage vertically symmetrical. Further, a feedback circuit is provided which monitors the voltages at both ends of the write coil, and prevents a variation in the common potential of the write coil. Terminal resistors are further provided to prevent the effects of reflection in a transmission line, and to prevent a change in the write waveform.

The embodiment of the invention discloses an antenna field calibration system and method, and the system comprises a to-be-tested antenna which is erected in a manner of being vertical to the ground and is used for transmitting electromagnetic waves which are transmitted upwards in the direction vertical to the ground; a scanning probe which is erected on a mechanical arm, directly faces and is coaxially erected with the to-be-tested antenna under the horizontal polarization condition at the same time, and is used for scanning electromagnetic waves emitted by the to-be-tested antenna; a control computer which is used for adjusting the mechanical arm, so that the probe opening surface of the scanning probe is parallel to the opening surface of the to-be-detected antenna at a position with a certain distance right above the to-be-detected antenna, and controlling the mechanical arm to enable the scanning probe to sequentially collect the amplitude and phase of each to-be-measured frequency point in the space at a preset stepping value according to the transverse axis of the mechanical arm in a preset scanning plane; and a vector network analyzer which is used for receiving acquired data of the scanning probe, measuring amplitude and phase values of the to-be-measured frequency points on a scanning plane, and recording the measured values and corresponding position coordinates; wherein the control computer converts the measured values and the corresponding position coordinate into a far-field pattern of the to-be-tested antenna.

The present invention provides a phase shifter assembly for an array antenna, comprising: a first level phase shifter, wherein the first level phase shifter is configured to control the phases of a plurality of sub-arrays of the array antenna, where each sub-array comprises one or more radiating elements; a second level phase shifter, wherein the second level phase shifter is configured to proportionally change the phases of the radiating elements in the corresponding sub-arrays; and a power divider, wherein the power divider is connected between the first level phase shifter and the second level phase shifter. The phase shifter assembly has the advantages of both a distributed phase shifter network and a lumped phase shifter network. Specifically, the phase shifter assemblies can independently control the phases of the radiating elements in the array to obtain better sidelobe suppression. Further, phase control parts of the phase shifter are concentrated within a certain physical space range, so the size of the phase shifter assembly may be greatly decreased, and the cost may be greatly reduced, as compared with a conventional distributed phase shifter assembly design.