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 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.

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 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.

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 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 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 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.