156results about How to "Launch stable" patented technology

An LED current control circuit including a current adjusting unit, a detecting unit, and a current control unit is provided. The current adjusting unit has a current control end coupled to an LED string for determining an amount of current flowing through the LED string according to a current control signal. The detecting unit detects the current control end and determines whether to generate a protecting signal according to a protecting voltage value. The current control unit generates the current control signal to control the amount of current flowing through the LED string of and determines whether to stop the current flowing through the LED string according to the protecting signal.

Expanded and extruded biodegradable polymer foams are obtained using biodegradable polymers and environmentally benign non-VOC methyl formate as a blowing agent. The blowing agent can be a blend further including at least one co-blowing agent, preferably an environmentally friendly species (e.g., non-VOC), which is either a physical co-blowing agent (e.g. an inorganic agent, a hydrocarbon, a halogenated hydrocarbon, a hydrocarbon with polar, functional group(s), water or any combination thereof), or a chemical co-blowing agent, or combinations thereof. The blowing agent blend can include any combination of methyl formate and one or more co-blowing agents. The polymer foam can include a biodegradable polymer or its blends with other biodegradable polymers or conventional (non-biodegradable) polymers. The methyl formate-based blowing agent blends produce stable foams for various applications, including containers, packaging systems, as well as for insulation and protective cushioning. Processes for the preparation of such foams are also provided.

The invention manages to provide a stable and fast differential quantum key distribution method and system thereof. At transmitting end, with a continuous laser source, the quantum codes are prepared using two approaches: 1) using the beam-splitting, polarization-independent and phase-stabilizing approach to prepare the stable quantum code; 2) using polarization approach to directly prepare stable quantum code. At receiving end,differential phase-Faraday-Micheal test approach is used to directly receive the quantum information.

The invention relates to a field electron emitting cathode based on the composite material of graphene / zinc oxide nanowire, comprising a conductive electrode and the composite material of graphene / zinc oxide nanowire, wherein the composite material of graphene / zinc oxide nanowire is positioned on the surface of the electrode, and consists of the graphene with the size ranging from 2 to 10 micronsand the zinc oxide nanowire with the length ranging from 1 to 2 microns and the diameter being 100 nanometers; and the turn-on field is lower than or equal to 1.7 volt / microns, and the threshold field is lower than or equal to 4 volt / microns. The filed emission electron source has the advantages of lower turn-on field, low threshold field, high emission current density, stable emission, easy preparation method and easy realization of industrialized volume production.

The invention provides a zinc-doped carbon quantum dot, a preparation method thereof and application thereof to the detection field. The carbon quantum dot high in quantum yield can be obtained through an environment-friendly simple one-step hydrothermal method by doping the zinc element for the first time, and the fluorescent quantum yield is high and can reach 63%. The preparation method specifically includes the steps that a carbon source and a zinc source are dissolved to obtain a precursor solution and placed into a hydrothermal reaction kettle to be reacted, after a synthesized product is naturally cooled, the product is separated to obtain a solution, the solution is dried, and the zinc-doped carbon quantum dot high in fluorescent quantum yield is obtained. Raw materials required by the method are few, intermediate products and side products are few, reaction speed is high, and the method is economical and environmentally friendly. The light emitting intensity of the zinc-doped carbon quantum dot is high and can reach 5.8*10<5>, the zinc-doped carbon quantum dot has wide application prospects as a fluorescent probe in biomedical detection, and the zinc-doped carbon quantum dot can be used for trace and quantitative analysis and detection of hydrogen peroxide and glucose.

An aroma emitting apparatus for using a cigar-jack installed with a cartridge and, simultaneously, equipped with a plug whose angle and length are adjustable, which is widely used free from a mounted position of the cigar-jack of various kinds of cars to stably emit fragrance from the cartridge. In case of no use under the state that the cartridge is installed to the plug, an air-vent hole is tightly closed for minimizing consumption of liquid and alteration of fragrance. An auxiliary cigar-jack unit allows for another use for a cigar-jack item as well as an air refreshing effect.

The invention relates to a pyrolytic synthesis method for water-soluble fluorescent carbon nano-particles, which belongs to the technical field of nano-carbon material preparation processes. A main process of the method comprises: calcining ethylenediaminetetraacetic acid disodium salt (EDTA-2Na) or ethylenediaminetetraacetic acid tetrasodium salt (EDTA-4Na) sold on market in a tube furnace under the protection of N2 gas at 400 DEG C for 2 to 3 hours; grinding a sample into powder after calcination; dissolving the obtained powder in a certain amount of ethanol; placing the obtained product in an ultrasonic oscillator for 5 to 10 minutes of ultrasonic treatment; performing high-speed ion separation to obtain supernatant; subjecting the supernatant to rotary evaporation to obtain concentrated solution; pouring the concentrated solution into a beaker; and putting the beaker into an oven for drying so as to obtain the water-soluble fluorescent carbon nano-particles. The product of the invention can be applicable to the field of biomedicine and the application field of luminescent electronic devices.

The invention relates to a copper selenide fluorescent quantum dot and a preparation method and application thereof. The copper selenide fluorescent quantum dot is characterized in that the quantum dot is one of Cu2Se, CuSe and Cu(2-x)Se or a combination thereof; the particle size of the quantum dot is 2-10nm, the quantum yield is 10-60%, and the half-peak width of the photoluminescence spectrum is 30-150nm. The preparation method comprises the following steps: with an aqueous solution with copper salt dissolved in as an aqueous phase and an organic solvent with a long-chain ligand dissolved in as an oil phase, stirring in an inertia protective gas, and heating in an oil bath to form a precursor solution; pouring an aqueous solution of sodium hydrogen selenide into the hot precursor solution, and heating for reaction; sampling at different time to obtain organic-phase quantum dot solutions with different emission fluorescence; precipitating the upper-layer organic-phase quantum dot solution; centrifuging and dispersing, and repeating to remove unreacted raw materials to obtain the copper selenide fluorescent quantum dot. The quantum dot does not contain heavy metal elements such as cadmium and the like to realize low toxicity, has the advantages of high quantum yield, uniform particle size, relatively narrow fluorescence emission spectrum and adjustable light color along with excitation wavelength, and can be used for preparing quantum dot solar sensitized cells and LED (light-emitting diode) devices.

The invention belongs to the field of micro-organism animal cell line and relates to a human hepatoma cell line which can emit high-intensity red or green fluorescence and has high transferring ability of lung and lymph node metastasis, and a method for establishing the same. The method comprises the following steps: using the human hepatoma cell line HCCLM3 and HCCLM6 which have high transferring ability of the lung and lymph node metastasis as mother cells, performing cotransfection on plasmid DNA of 239 cells through slow virus packaging plasmids to obtain false slow virus particles by expressing red or green fluorescent protein genes through eucaryon, and infecting liver cancer cell strains of the mother cells to obtain the chromosome integrated hepatoma cell line which has high transferring ability of the lung and lymph node metastasis and can stably expressing the red or the green fluorescence. The human hepatoma cell line which has high transferring ability of the lung and lymph node metastasis in vitro can be applied to the tracer studies on tumor cells, the molecular mechanism studies on the recurrence and transferring of liver cancer, as well as the pre-clinical drug efficacy studies on new anti-tumor drugs, thus the human hepatoma cell line has wide application prospect.

The invention belongs to the field of microorganism animal cell system, and relates to an establishment method of a fluorescence visualization human hepatoma nude mice model which can self emit high strength red or green fluorescences and has the metastatic ability. After obtaining a human high-metastatic fluorescence hepatoma cell line HCCLM3-R, HCCLM3-G, HCCLM6-R and HCCLM6-G of fluorescence genes with high chromosome conformable degree, high fluorescence intensity and stable expression by using the method of pseudotype slow virus infection, hepatoma cells expressed by the fluorescences is placed beneath nude mice skin to establish a fluorescence visualization high-metastatic human hepatoma nude mice subcutaneous tumor model or subcutaneous fluorescence expression tumor tissues is placed in nude mice hepar to establish a fluorescence visualization high-metastatic human hepatoma nude mice hepar primary tumor model. The got model can be used as a tracer of animal in vivo hepatoma cells, and can be used for molecular mechanism study of hepatoma recurrence and metastatic and prophase therapeutic effect discrimination for new anti-hepatoma therapy and new anti-hepatoma drugs, etc.

The invention discloses a nickeliferous fluorescent quantum dot which is low in toxicity, has wide absorption spectrum and narrow fluorescence emission spectrum, and is adjustable in luminous color along with excitation wavelength, high in luminous efficiency, high in stability and applicable to construction of quantum dot-sensitized solar cells and LED devices. The nickeliferous fluorescent quantum dot comprises one of or combination of nickel selenide, nickel telluride and nickel sulfide, the quantum dot particle size ranges from 2nm to 20nm, the quantum yield is 10-60%, and the half-peak width of a photoluminescence spectrum is 30-130nm. Preferably, the NiSe fluorescent quantum dot is optimal when x=0.5.

The invention discloses a bidirectional amplifier of a TDD mode. The bidirectional amplifier comprises a switch circuit, an emission circuit, a transmit-receive isolation circuit, a receiving circuit and a transmit-receive control circuit. The transmit-receive isolation circuit comprises a double circulator. An output terminal of the emission circuit is connected to an input terminal of the double circulator. An input terminal of the receiving circuit is connected to a receiving terminal of the double circulator. An antenna terminal of the double circulator is connected to an antenna. The antenna terminal receives / sends an antenna signal. The transmit-receive control circuit is connected to the switch circuit, the emission circuit, the receiving circuit and the transmit-receive isolation circuit. The invention provides a receiving and emission high isolation circuit based on the TDD mode; and simultaneously a low noise receiving requirement and a linear large-power output requirement are satisfied, and stable and anti-interference work can be performed.

The invention, which relates to the technical field of field emission, provides a carbon-nano-field emission cathode and a manufacturing method and application. The carbon-nano-field emission cathodecomprises a substrate, a graphene layer horizontally coated on the substrate, and a carbon nanotube array arranged on the graphene layer. Roots of all carbon nanotubes in the carbon nanotube array arein covalent linkage with the graphene layer. According to the invention, because the roots of all carbon nanotubes are in covalent linkage with the graphene layer, the interface resistance is extremely low and thus the carbon nanostructure has excellent conductivity, so that the opening electric field of the cathode is reduced obviously; the heat generated during the field emission process is lowand thus the cathode can be emitted stably at the high current, so that the operating current of the cathode is improved substantially. Moreover, because the three-dimensional covalent structure hasexcellent thermal conductivity, the emission stability of the cathode is improved.

An electron emitting device is composed of a plurality of electron emitting elements. The electron emitting element is provided with a lower electrode (11) and an upper electrode (15) and emits an electron from an upper electrode side. In the electron emitting device, a space is formed between the electron emitting elements and the upper electrode extends over the space on a bridge part (15a). The space is formed by providing a through hole or a notched part (15a) on the bridge part, and etching a stacked body under the upper electrode by using the bridge part as a mask. The upper electrodes of the adjacent electron emitting elements are electrically connected by the bridge part without bringing the upper electrodes into contact with the electron emitting element side planes and a substrate. Therefore, a current path can be shortened and a possibility of disconnection can be reduced.

To provide a light emitting device capable of emitting light with high efficiency and of being formed by a coating process, the present invention provides a light emitting device including as a light emitting material a polymeric mixed-metal complex containing two or more kinds of metals selected from Cu, Ag, and Au.

The present invention relates to field emission display with carbon nanotube cathode, and is especially field emission plate display with ballast resistor structure and its manufacture. The field emission plate display includes sealed vacuum cavity comprising cathode panel, anode panel and glass frame, conductive In-Sn oxide film layer and phosphor layer on the anode panel, control grid, conductive cathode carbon nanotube layer on the cathode panel, ballast resistor layer and carbon nanotube cathode. The ballast resistor structure includes ballast resistors for the carbon nanotube cathode under each pixel to regulate the electron emitting capacity of the carbon nanotube, to raise the electron emitting homogeneity and stability of the whole cathode, to strengthen the adhesion carbon nanotube and cathode panel and to improve the quality of the displayed image. The present invention has the advantages of simple structure, low cost, etc.

A dot projector with automatic power control includes a housing covering a substrate with an installing space and a platform therein, an automatic power control integrated circuit, a photodiode and a reflector disposed under the platform of the housing, a collimator disposed in the installing space of the housing and a diffractive optical element bonded on the platform of the housing. Whereby a laser diode emits a laser light to the reflector for the laser light to be reflected perpendicularly through the collimator to the diffractive optical element; then the diffractive optical element produces a plurality of light spots and the a stray light is also produced from the laser light. The photodiode of the automatic power control integrated circuit then detects the stray light and produces a feedback signal transmitted back to the laser diode for adjustment of the laser emission power in order to control the light spots produced by the diffractive optical element.

The invention discloses a self-stabilizing launching device for probe launching from lunar surface. The device is applied in the returning flying process of the re-entry module of the lunar probe. When the re-entry module of the probe fires and takes off the device can guarantee the reliable unlocking and detaching of the re-entry module. A launching seat is stably supported on the lunar surface. The problems of backrush flame, impinging jets and lunar dust contamination caused by the firing of the re-entry module can be mitigated. The device comprises a launch silo, a magnesium tape fastening mechanism and a guiding mechanism. The launch silo is positioned on a landing module. The relative motions between the launch silo and the re-entry module is confined by the magnesium tape fastening mechanism. During the launching the gas jet emitted from the engine functions on the magnesium tape to unlock the fastening mechanism a guiding button and a guiding slot can be used to guide the flying direction of the re-entry module.

The invention discloses a borate fluorescent powder for a white-light LED. The borate fluorescent powder is shown in the following chemical formulas: aMo.bNO.cB2O3: xEu<2+>, yCe<3+>, zTb<3+> and (y+z)Na<+>, wherein M is Ba or Sr, N is Mg, Zn or Ca, and a, b, c, x, y, z are respective molar fractions; the values are as follows: a is more than 1 and less than 3, b is more than 0.5 and less than 2, c is more than 0.5 and less than 2, x is more than 0.001 and less than 0.2, y is more than 0.01 and less than 0.2, z is not less than 0 and less than 0.2. The invention further discloses a preparation method of the borate fluorescent powder for the white-light LED. The borate fluorescent powder disclosed by the invention has the beneficial effects of stable performance, wide range of excitation and emission spectrum, high color rendering index, simple process, easy operation, no pollution and low cost.

The invention relates to a field emission illumination light source, which comprises a hollow tubular shell, an anode, a cathode and a lamp cap, wherein one end of the shell is connected with the lamp cap, the anode is arranged in a side wall of the shell, the cathode and the anode are both adaptive to the shape of the side wall of the shell, the cathode is fixed on the lamp cap and is opposite to the anode, and the cathode is provided with a plurality of light holes. In the field emission illumination light source, the shell has the same shape as that of a cathode substrate, the anode is coated on the side wall of the shell, and the cathode is provided with the light holes, so a light emitting area is enlarged, visible light penetrates through the light holes to effectively improve the light emitting effect, and after voltage is applied, the cathode substrate forms an emission source, and emitted electrons impact the anode to emit visible light so as to obtain higher light emitting efficiency. The characteristics of low working voltage, low power consumption and stable emission are realized.

The invention relates to a preparation method of carbon quantum dots with blue-green fluorescence, which comprises the following specific steps: putting polyimide and water into a hydrothermal kettle, or putting polyimide, water and a passivator into a hydrothermal kettle; then, putting the hydrothermal kettle into a drying oven, and increasing the temperature to carry out a heating reaction; after the reaction is completed, stopping heating, cooling, and taking a solution out the hydrothermal kettle; and centrifugalizing, taking liquid supernatant, dialyzing the liquid supernatant by using a dialysis membrane, thus obtaining a carbon quantum dot aqueous solution. The method disclosed by the invention has the characteristics of mild reaction conditions, simpleness, and easiness for implementation. Prepared carbon quantum dots with blue-green fluorescence can stably emit blue-green fluorescence and the quantum yield is high.

A Field Emission Device (FED) includes an emitter formed on a cathode electrode and including Carbon NanoTubes (CNTs), and a gate electrode to extract electrons from the emitter. In addition, a RuOx layer or a PdOx layer is coated on the emitter to protect the CNTs and to stabilize the emission from the CNTs. A stabilizer layer to stabilize an emission structure and to protect emission ends is coated on the surface of a CNT emitter or the surfaces of the CNTs, more specifically, the emission ends of the CNTs, in order to prevent abrasion of the CNTs caused by an excess current or an emission process.

An electron emission device effectively blocks an electric field generated by an anode, consistently and stably emits electrons at a low gate voltage, and provides a high luminous uniformity and luminous efficiency. In addition, a flat display apparatus using the electron emission device as a backlight unit (BLU) and a method of driving the light emission device are provided. The electron emission device includes: a base substrate; a first electrode including a first main electrode portion arranged on a surface of the base substrate and extending in a predetermined direction and a first auxiliary electrode extending from the first main electrode portion; a second electrode including a second main electrode portion arranged on the surface of the base substrate and separated from the first electrode and extending in a predetermined direction and a second auxiliary electrode extending from the second main electrode portion; and an electron emission source arranged on at least one of the first and second electrodes.

The invention provides a magnetron employing a combined cold cathode head and a production method of a cold cathode body in the cold cathode head. The magnetron comprises a magnetron shell, a blade, a cathode assembly and an antenna, wherein the magnetron shell comprises an upper tube shell, a lower tube shell, an input end ceramic cylinder, an output end ceramic cylinder, an exhaust pipe head, an anode tube, an upper magnetic pole and a lower magnetic pole; the blade is arranged in the anode tube; the cathode assembly comprises an upper shielding cap, a lower shielding cap, the combined cold cathode head and a power connecting rod; the combined cold cathode head comprises an electrode wire and the cold cathode body. The production method of the cold cathode body comprises a material preparation and ball-mill mixing step, a compression molding step and a sintering step. A lamp filament of a traditional hot cathode is taken as the electrode wire and is also taken as a secondary electron emitter; the cold cathode body forms field emission to generate primary electrons under the cathode-anode high-voltage action; and the temperature of the connected part of the power connecting rod and the lower shielding cap is lower than 500 DEG C during working, so that the magnetron has the characteristics of being high in emission current, stable in emission, high in efficiency, good in electromagnetic compatibility, long in lifetime, high in reliability, simple and reliable in production technology, low in cost and the like.

The invention relates to the technical field of UAV (unmanned aerial vehicle), particularly an UAV ejection buffer protective device. The UAV ejection buffer protective device comprises a shell; the lower surface of the shell is provided with a self-balancing device; a moving column penetrates through the upper part of the internal side of the shell; an operation panel is arranged on the lower part of the external side of the shell; a storage battery, a first ring-shaped magnet, a second ring-shaped magnet shell and a clamping device are arranged on the lower surface of the internal side of the shell; a drawstring passes around a fixed pulley, penetrates through a through hole and is connected with a limiting block. The self-balancing device arranged in the invention can automatically maintain a horizontal plate in a horizontal state. The arranged first ring-shaped magnet and a second ring-shaped magnet can reduce contact friction. The arranged clamping device can clamp and fix the drawstring. The UAV can be ejected with the elasticity of a spring. The whole ejection process is smooth and stable. During ejection, the UAV is in a horizontal state, so that the stability of the ejection of the UAV is enhanced. The use effect is good, the practicality is strong, and popularization and utilization are worthwhile.

A film field emission cathode with ingredient gradually changed in electron transport layer belongs to the technique area of vacuum electron emission type of flat display device, especially in relates to the structural design of plane type field emission cathode. The invention is composed of base plate glass, lower metal electrode, insulated layer with single component, electron transport layer and upper electrode. The medium film the ingredient gradually changed is adopted in electron transport layer, i.e. from button to top of the medium film, the ingredient of high electric affinity is changed to that of lower electric affinity. Metal or semiconductor film with lower work function is adopted in the upper electrode. The invention possesses features of large emissive current, long service life and lower cost. It is suitable for producing field emission type flat display device with large area.

The invention discloses an illuminating display with a cascading double-goose-winged clearance tip-shaped cathode slope-wave hybrid line gated structure. The display comprises a vacuum enclosure and agetter accessory element located in the vacuum enclosure, wherein the vacuum enclosure is composed of a flat glass upper partition plate, a flat glass lower partition plate and a rectangular glass strip; a conductive film anode layer, an outer line electric anode silver layer and a thin luminescent layer are provided on the flat glass upper partition plate; the conductive film anode layer is connected to the outer line electric anode silver layer; the thin luminescent layer is formed on the conductive film anode layer; and the cascading double-goose-winged clearance tip-shaped cathode slope-wave hybrid line gated structure is arranged on the flat glass lower partition plate. The illuminating display provided by the invention has the advantages of diversified display illuminating colors, high display illuminating brightness, low manufacturing cost, and stable and reliable process.

A strobe device 1 includes an electrically-conductive reflector 3 into which a xenon tube 2 having xenon gas enclosed therein and having a light-transmitting property is housed. The xenon tube 2 has an anode 21 and a cathode 22 at both ends, and a sintered body 23 electrically connected to the cathode 22 at the cathode-22 side inside the xenon tube 2. A cathode-22-side end 34a of a bottom surface 34 of the reflector 3 is positioned closer to the anode-22 side than the sintered body 23. The bottom surface 34 is provided with an electrically-conductive projecting portion 35 projecting from the cathode-22-side end 34a so as to be closer to the cathode-22 side than the anode-side end 23a of the sintered body 23.