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116results about How to "Guaranteed driving ability" patented technology
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Heterojunction carbon nano-tube field effect transistor and preparation method thereof
ActiveCN106356405AGuaranteed driving abilityGuaranteed speedSemiconductor/solid-state device manufacturingSemiconductor devicesHeterojunctionCarbon nano tube field effect transistor
The invention provides a heterojunction carbon nano-tube field effect transistor of which a subthreshold swing is smaller than 60 millivolt / magnitude in the room temperature and a preparation method thereof. The device uses the semiconductor carbon nano-tube as the active layer, the heterojunction formed by the graphene layer and the semiconductor carbon nano-tube is used as the source end of the device, the gate medium and the gate electrode modulate the carbon nano-tube channel and the graphene / carbon nano-tube junction at the same time, so that the turn-off of the transistor is accelerated by using the character that the graphene / carbon nano-tube junction barrier is modulated by the gate voltage. The transistor can control the polarity through the selection of the source-drain metal, namely the metal of high power function is used as the source-drain electrode for realizing the p-type field effect transistor, and the metal of low power function is used as the source-drain electrode for realizing the n-type field effect transistor.
Owner:BEIJING HUA TAN YUAN XIN ELECTRONICS TECH CO LTD
Novel charge pump circuit in chip for motor drivers
ActiveCN102882369AImprove performanceConstant differenceApparatus without intermediate ac conversionPower flowElectric machine
The invention discloses a novel charge pump circuit in a chip for motor drivers, which comprises at least a pair of PMOS (p-channel metal oxide semiconductor) switch tubes, at least a pair of NMOS (N-channel metal oxide semiconductor) switch tubes, a feedback control unit, an OSC oscillator, and driver units, wherein the number of the driver units is same as the number of the MOS switch tubes; and the PMOS switch tubes and the NMOS switch tubes constitute a set of H-bridge topological structure, the PMOS switch tubes and the NMOS switch tubes are respectively connected with the corresponding driver units thereof, at least a PMOS switch tube is connected with the feedback control unit, and the feedback control unit is connected with the OSC oscillator. Through using the characteristics of output voltages of charge pumps, the charge pump circuit disclosed by the invention can ensure the capacity of driving grid electrodes of H-bridge high-end NMOS power tubes in direct-current / stepping motor drivers, so that a situation that the current for driving a direct-current / stepping motor keeps constant is ensured, therefore, small electromagnetic interference is ensured, and the on-resistance of each H-bridge high-end NMOS power tube can be reduced, so that the stable current of the motor is satisfied, and the operating efficiency of the driver is ensured.
Owner:JIAXING HEROIC ELECTRONICS TECH
Automatic spiral hole milling device and method
InactiveCN102717135AGuaranteed adjustment accuracyGuaranteed machining accuracyAutomatic control devicesFeeding apparatusMechanical engineeringHole making
The invention discloses an automatic spiral hole milling device and a method used for a large workpiece multihole system. The automatic spiral hole milling device comprises an L-shaped support as well as a revolution radius regulating mechanism, a tool rotation speed regulating mechanism and a spiral feeding mechanism which are arranged on the support. The automatic spiral hole milling device disclosed by the invention can be taken as a handheld spiral hole making tool and also can be taken as a terminal executing unit of a robot automatic hole making system, and processing quality and efficiency of the large workpiece multihole system can be greatly improved.
Owner:靖江市华宏机械有限公司
A grid electrode drive circuit and a display apparatus
ActiveCN105261341AGuaranteed driving abilitySimple designStatic indicating devicesCapacitanceLow voltage
The invention brings forward a grid electrode drive circuit comprising multiple stages of grid electrode driving units. Each stage of grid electrode driving unit comprises a first switch element to a tenth switch element and a first capacitor; And the grid electrode driving unit receives a first clock signal to a fifth clock signal, a first pulse signal, a second pulse signal and a reference low voltage. The invention also provides a display apparatus. According to the grid electrode drive circuit and the display apparatus of the present invention, grid electrode driving signals are stabilized through utilization of the ninth switch element and the tenth switch element, thereby guaranteeing driving capability of the circuit and facilitating the design of a narrow frame of the circuit.
Owner:KUSN INFOVISION OPTOELECTRONICS
Pixel unit, pixel circuit and driving method of pixel circuit
ActiveCN103489404AReduce stress timeFix display quality degradationStatic indicating devicesVoltage referenceSignal lines
The invention relates to the technical field of display, in particular to a pixel unit, a pixel circuit comprising the pixel unit and a driving method of the pixel circuit. The pixel circuit comprises a lighting device and n driving sub-circuits, wherein the n is a natural number and is larger than 1. Each driving sub-circuit comprises a control electrode scan signal line, a switch transistor and a driving transistor. A control electrode of the switch transistor is connected with the control electrode scan signal line, a first electrode is connected with a data line, and a second electrode is connected with a control electrode of the driving transistor. A first electrode of the driving transistor is connected with a power supplying line, and a second electrode is connected with a third electrode of a luminescent device. A fourth electrode of the luminescent device is connected with a reference voltage end. According to the pixel circuit, the design that the n driving sub-circuits used for driving the luminescent device to illuminate is adopted so that the driving sub-circuits can drive the luminescent device to illuminate according to the time sequence stage. Stress time of the driving transistor in each driving sub-circuit can be effectively shortened in this way.
Owner:BOE TECH GRP CO LTD +1
Shedding device of weaving machine
InactiveCN101922076AEasy to driveSolve problems that are longed to be solved but not solvedLoomsOther shedding mechanismLinear motionElectric machine
The invention discloses a shedding device of a weaving machine, which adopts an electric machine to independently drive each heald frame. The device comprises a plurality of sets of driving mechanisms (3) for driving heald frames (4). The driving mechanisms (3) comprise electric machines (5), driving swing arms (6) and parallelogram linkages (7). The output ends of the driving swing arms are hinged with connecting rods (11) of the parallelogram linkages (7), the driving swing arms (6) and side links (9) are not only of the same length but also are parallel to each other. The electric machines (5) drive the driving swing arms (6), the output ends of the driving swing arms drive the connecting rods (11), and the connecting rods (11) transmit the driving power to the side links (9) at the left sides and right sides of the parallelogram linkages (7) so as to enable the heald frames (4) to complete reciprocating linear motion. In the invention, the driving mechanisms (3) do not occupy any space expect that of a weaving machine rack (12), so that the weaving machine (1) occupies obviously reduced space, the sizes of the driving mechanisms (3) are uniform and only electronic setting is required to adjust heald frame (4) stroke.
Owner:赵斯伟
Electric automobile and air conditioner control system and control method thereof
InactiveCN104596021AEasy to driveEffective controlSpace heating and ventilation safety systemsLighting and heating apparatusPower batteryControl system
The invention provides an electric automobile and an air conditioner control system and control method of the electric automobile. The air conditioner control system comprises an air conditioner management device and a vehicle control unit, the air conditioner management device is connected with a refrigerating device and / or a heating device and used for judging whether the refrigerating device and / or the heating device meet / meets a starting conditioner or not, and when the refrigerating device and / or the heating device meet / meets the starting condition, a request signal for starting the refrigerating device and / or the heating device is sent out; the vehicle control unit is in communication with the air conditioner management device through a CAN bus and is connected with the air conditioner management device through a hard wire, the vehicle control unit judges whether the electric automobile meets the starting condition of the refrigerating device and / or the heating device or not after receiving the request signal, and the vehicle control unit sends out a signal allowing starting to the air conditioner management device when the starting condition is met. According to the air conditioner control system and control method of the electric automobile and the electric automobile, the vehicle control unit can coordinate with the state of the finished automobile to control the air conditioner system, good performance of a power battery can be protected, and driving performance of the electric automobile is not affected.
Owner:BEIJING BORGWARD AUTOMOBILE CO LTD
Vehicle power control method and system, computer readable storage medium and vehicle
ActiveCN109278725AAvoid interferenceGuaranteed driving abilityFoot actuated initiationsPropulsion unit arrangementsMaster cylinderEngineering
The invention discloses a vehicle power control method and system, a computer readable storage medium and a vehicle. The vehicle power control method comprises the steps that the accelerator pedal opening is obtained and whether an accelerator pedal is stepped on or not is judged; on-off information of a brake pedal is obtained and whether the brake pedal is stepped on is analyzed; a pressure value of a brake master cylinder is obtained; vehicle demand power is explained according to the opening of the accelerator pedal in response to the accelerator pedal not being stepped on; the vehicle demand power is explained according to the opening of the accelerator pedal in response to the accelerator pedal being stepped on and the brake pedal not being stepped on; in response to the acceleratorpedal and the brake pedal both being stepped on, the pressure value of the brake master cylinder is more than a pressure threshold value Prs1, the time of the accelerator pedal and the brake pedal both being stepped on is more than or equal to a threshold value T1, the whole vehicle demand power is analyzed according to the pressure value of the brake master cylinder and the opening of the accelerator pedal, if not, the vehicle demand power is explained according to the opening of the accelerator pedal, but a power threshold value Pwr3 cannot be exceeded. The vehicle power control method guarantees the safety, and has a good driving experience.
Owner:深蓝汽车科技有限公司
Pilot-operated type electromagnetic pneumatic valves and combined control valve
ActiveCN106989195AReduce load forceReduce drive loadOperating means/releasing devices for valvesLift valveEngineeringPneumatic valve
The invention belongs to the field of control valves and particularly relates to pilot-operated type electromagnetic pneumatic valves and a combined control valve. Each pilot-operated type electromagnetic pneumatic valve mainly comprises a valve body, a pilot-valve valve core component, a main-valve valve core assembly and an electromagnetic coil drive device. Each electromagnetic coil drive device is powered on to drive a pilot valve to be switched on and controls air to enter a pilot-valve core installation cavity, an exhaust opening is sealed, the air is controlled to establish pressure, then a main valve is driven to be switched on, and a medium flows out of a medium outlet from a medium inlet; and after each electromagnetic coil drive device is powered off, the pilot valve is switched off, the air is controlled to be exhausted out of the exhaust opening, the main valve is switched off, and the medium is prevented from flowing out of the medium outlet. The combined control valve is a combination of the multiple pilot-operated type electromagnetic pneumatic valves, the structure is optimized, and the combined control valve is suitable for occasions, such as a rocket with a high requirement for the radial size. The pilot-operated type electromagnetic pneumatic valves and the combined control valve are mainly used for occasions with a large flow and high pressure, such as, liquid rocket engines, satellite in-orbit execution systems, ground test systems and automated fluid pipe systems and have the advantages of being high in integrated degree and high in response speed.
Owner:XIAN AEROSPACE PROPULSION INST
Polymer actuator
InactiveCN102204079AImprove insulation performanceGuaranteed driving abilityMachines/enginesMechanical power devicesConductive polymerEngineering
Owner:PANASONIC CORP
Thin film transistor, manufacturing method thereof and display device
ActiveCN109686794AGuaranteed driving abilityHigh aspect ratioTransistorSemiconductor/solid-state device manufacturingInter layerOxide thin-film transistor
The invention discloses a thin film transistor, a manufacturing method thereof and a display device, relating to the technical field of display. The thin film transistor includes a first target layer,a first insulating layer, an intermediate layer, a second insulating layer, and a second target layer which are sequentially disposed on a substrate. When the two target layers are both active layers, the driving capability of the thin film transistor can be ensured without increasing the planar size of the thin film transistor. When the two target layers are both gate layers, two gate layers surrounding the upper and lower sides of the active layer may be formed in the thin film transistor. The two gate layers can collectively drive the active layer, thereby increasing the driving capabilityof the thin film transistor. With the solution, the driving capability of the thin film transistor can be ensured without increasing the planar size of the thin film transistor, and the implementation of a high-resolution and narrow-bezel display device can be facilitated.
Owner:BOE TECH GRP CO LTD +1
Hanging basket device for high-voltage transmission line inspection
ActiveCN110994446AGuaranteed work efficiencyImprove the efficiency of obstacle clearanceApparatus for overhead lines/cablesElectric machineryDrive motor
The invention discloses a hanging basket device for high-voltage transmission line inspection. The hanging basket device comprises four groups of symmetrically arranged walking devices and a hanging basket, each group of walking devices is provided with three rollers, and first belt wheels are arranged on a first rotating shaft. The two ends of a second rotating shaft are movably installed on an installation plate through bearings, a second belt wheel is arranged on the second rotating shaft, and the second belt wheel is connected with the three first belt wheels through belts. Third belt wheels are coaxially arranged at one side of the second belt wheel, and the two third belt wheels of the walking device at the same side are connected through a belt. A first connecting plate is arrangedat one side of the installation plate, a driving motor is arranged at one side of the connecting plate, and a driving motor output shaft is connected with the second rotating shaft. A hanging rod is arranged at one side of the lower portion of the first connecting plate and is connected with a hanging basket body through a connecting rod. The walking devices are arranged to be the planet wheel structures, when encountering an obstacle, the planet wheel structures automatically turn over to cross the obstacle, the parking adjustment is not needed, and the obstacle crossing efficiency is improved, and therefore the inspection work efficiency is guaranteed.
Owner:RES INST OF ECONOMICS & TECH STATE GRID SHANDONG ELECTRIC POWER +3
Array substrate, preparation method thereof and display panel
ActiveCN110880518AReduced subthreshold swingGuaranteed driving abilitySolid-state devicesSemiconductor/solid-state device manufacturingCapacitanceThin membrane
The embodiment of the invention discloses an array substrate, a preparation method thereof and a display panel, the array substrate comprises a thin film transistor array layer, and the thin film transistor array layer comprises a driving transistor, a switching transistor and a capacitor; wherein the driving transistor comprises a first active layer, a first gate insulating layer, a first gate and an insulating dielectric layer which are stacked in sequence; the switching transistor comprises a second active layer, a second gate insulating layer and a second gate which are sequentially stacked; wherein the insulating dielectric layer and the second gate insulating layer are the same layer; the thickness of the first gate insulating layer is larger than that of the second gate insulating layer, so that the sub-threshold swing of the driving transistor is large, meanwhile, the sub-threshold swing of the switching transistor is small, and the driving capacity of the driving transistor and the switching control capacity of the switching transistor can be guaranteed at the same time.
Owner:YUNGU GUAN TECH CO LTD
Operational amplifier circuit and overcurrent protection method thereof
PendingCN108832900AAvoid damageGuaranteed output efficiencyAmplifier modifications to reduce temperature/voltage variationAmplifier modifications to raise efficiencyCapacitanceTemperature control
Owner:CHIPONE TECH BEIJINGCO LTD
Level shifting circuit
ActiveCN107222198AReduce peak currentFlip fastLogic circuits coupling/interface using field-effect transistorsVoltage/current interference eliminationLevel shiftingCurrent limiting
The invention provides a level shifting circuit. The level shifting circuit comprises a booster module and a first phase reversal module; the first end of the booster module is connected with the input end of the level shifting circuit, the second end of the booster module is connected with a first high level signal end, the third end of the booster module is connected with a low level signal end, and the fourth end of the booster module is connected with the first end of the first phase reversal module; the second end of the first phase reversal module is connected with the first high level signal end, the third end of the first phase reversal module is connected with the low level signal end, and the fourth end of the first phase reversal module is connected with the first output end of the level shifting circuit; the first phase reversal module is used for communicating the third end and the fourth end of the first phase reversal module when the first end receives a high level signal; the first phase reversal module is used for communicating the second end and the fourth end of the first phase reversal module when the first end receives a low level signal; and a first current limiting module is arranged between the second end and the fourth end or between the third end and the fourth end of the first phase reversal module, and the first current limiting module is used for limiting current passing through the current limiting module per se to enable the maximum current value to be not greater than a first preset value. The invention can reduce peak current while improving the driving capability.
Owner:BOE TECH GRP CO LTD
Wide-range voltage and high-current output method and power system
PendingCN109327141AStable outputSolve the difficulty of narrow adjustable rangeDc-dc conversionElectric variable regulationOutput feedbackLarge range
The invention discloses a wide-range voltage and high-current output method and a power system. Voltage and current are provided for a first MOS (metal oxide semiconductor) tube by a standard buck circuit; conduction impedance of the first MOS tube is adjusted according to a comparison result of an output feedback voltage VFB of the first MOS tube and a preset target voltage Vset, operation of thefirst MOS tube in a transverse flow area is realized, and accordingly wide-range voltage and high-current stable output of the power system is realized, and the problem of a narrow adjustable range of current non-isolated module output voltage is solved. In addition, the problem of high output voltage fluctuation under the condition of large-range dynamic changes of output current is solved, andripple and precision indexes of wide-range output power sources are optimized.
Owner:武汉精鸿电子技术有限公司
Power amplifier with online impedance monitoring function and adjusting method thereof
PendingCN113691225AGuaranteed driving abilityChange duty cycleResistance/reactance/impedenceGain controlInformation processingHemt circuits
The invention discloses a power amplifier with a online impedance monitoring function and an adjusting method thereof. The power amplifier comprises a power amplification unit and an online impedance monitoring unit, the power amplification unit comprises a power amplification controller, a driving circuit and a power amplification module which are connected in sequence, the power amplification controller is connected with an input information source, the power amplification module is connected with a load, the online impedance monitoring unit comprises an information processing module, an amplitude detection circuit, a phase preprocessing circuit and a voltage and current acquisition circuit, the input end of the voltage and current acquisition circuit is connected with the output circuit of the power amplification unit, the output end is connected with the amplitude detection circuit and the phase preprocessing circuit, the amplitude detection circuit and the phase preprocessing circuit are connected with the information processing module, and the information processing module is connected with the power amplification controller. According to the invention, the load impedance is monitored in real time through the online impedance monitoring unit, the gain of the power amplification module is adjusted, and the problem of circuit mismatching caused by the gain parameter of the power amplifier is solved.
Owner:中科长城海洋信息系统有限公司
Load adjustable surface acoustic wave actuator
InactiveCN1592072AGuaranteed contact pressureGuaranteed driving abilityPiezoelectric/electrostriction/magnetostriction machinesSurface waveEngineering
A loading adjustable surface sound wave actuating device includes: a positioning platform with a sliding bearing at each of the opposite sides, a surface sound wave actuating device set on the platform between the two sliding bearings which can generate a preset surface sound wave on its top surface, a slide block on the platform having a force part contacting with the top surface of the actuator and two positioning parts set in the sliding bearings in which the sound wave of the actuator drives the block to shift, a supporting structure applying a preset force to the positioning part of the block, thus the contact pressure between the block and the actuator is kept at a constant value.
Owner:IND TECH RES INST
Steel disc for truck and bus tires and tire manufactured by using the same
InactiveCN105539018AReduce rigidityIncrease contact areaRoad vehicle tyresRoad vehiclesThree-dimensional spaceEngineering
A steel disc for truck and bus tires is integrally a three-dimensional design, which is reflected in a three-dimensional space of length, width and thickness; the steel disc is designed as wavy curved planes in both two vertical directions of a length direction and a width direction of the steel disc; in the width direction, the wavy curved plane extends to a position which is 2-5 mm from the edge of the steel disc; in the length direction, the wavy curved plane is arranged at a middle part and accounts for 70-95 % of the whole length; two end parts of the steel disc are designed as planes; in the length direction of the steel disc, each part is designed with unequal length; and in the width direction of the steel disc, each part is designed with unequal width. In a tire tread manufactured by using the steel disc, a plurality of three-dimensional grooves, which are manufactured by using the steel disc as a mold, are formed in each side pattern block and each should pattern block; and angles between the three-dimensional grooves and the central line of the tire tread are 35-90 DEG. According to the invention, as the snow coefficient of a tire manufactured by using the steel disc is 1.25-2.43, excellent braking and driving performances of the truck and bus tires on ice snow covered pavements or snow slush pavements are ensured.
Owner:SAILUN GRP CO LTD
Sartorius
ActiveCN1904175AAvoid enteringGuaranteed driving abilitySewing-machine casingsSewing machineElectric motor
The present invention relates to a sewing machine, a motor configuration region is arranged on the different position of the discharging hole for configuring principal axis motor, X motor, Y motor, theta motor etc, wherein the discharging hole is disposed on the junction of the upright post, the area between the motor configuration region and the forming part of discharging hole is spaced by the dividing wall projecting towards downside from the bottom of the substrate frame. This arrangement prevents the used lubricating oil introduced from discharging holes from getting into the electric motor arranged in the motor configuration region.
Owner:BROTHER KOGYO KK
Pixel drive units, drive method thereof, and pixel circuit
InactiveCN103440846AEliminate afterimage phenomenonAvoid uneven brightnessStatic indicating devicesActive matrixEngineering
The invention relates to the technical field of display, in particular to pixel drive units, a drive method of the pixel drive units, and a pixel circuit comprising the pixel drive units. The pixel drive units comprise drive sub circuits and control sub circuits. The control sub circuits are connected with data lines, and the drive sub circuits are connected with the control sub circuits. The pixel drive units effectively eliminate heterogeneity caused by the threshold voltages of drive transistors and the shadow phenomenon caused by threshold voltage drifting in the process of driving light-emitting devices. The uneven brightness problem of an active matrix OLED due to the fact that the threshold voltages of the drive transistors of the light-emitting devices of the different pixel drive units in the active matrix OLED are different is avoided, the drive effect of the pixel drive units on the light-emitting devices is improved, and quality of the active matrix OLED is further improved.
Owner:BOE TECH GRP CO LTD
Swing arm drive device for spraying antifreeze on coal-carrying train
The invention relates to a swing arm drive device for spraying antifreeze on a coal-carrying train, belonging to the field of machinery design. The swing arm drive device for spraying the antifreeze on the coal-carrying train is characterized by being of a structure of changing a shaft diameter by means of shaft sleeves and arranging a drive mechanism in the middle of a shaft, and the swing arm drive device comprises a square upright, a clamp device, a slewing mechanism, a driving mechanism, a stop block, an upper arm assembly and a lower arm assembly. One shaft sleeve is designed at each end of the shaft of the swing arm drive device, and the drive mechanism is arranged in the middle area of a rotating shaft, thus the distance between an upper support plate and a lower support plate in a limited space is increased, and the force applied by the supported swing arm to the rotating shaft is reduced. According to the invention, the diameter of the rotating shaft is changed by means of the shaft sleeves, and the position of the drive mechanism is rationally arranged, therefore volume and weight of the swing arm drive device are reduced, cost is saved and field installation is convenient. The swing arm drive device for spraying the antifreeze on the coal-carrying train has the characteristics of lower horizontal rotating speed, smaller rotating driving torque and strong radial carrying capacity at two ends of the rotating shaft, is in particular suitable for support and horizontal rotating drive to the swing arm for spraying the antifreeze on the coal-carrying train.
Owner:TAIYUAN UNIV OF TECH
Display panel and display device
ActiveCN111708231AAchieve narrow bordersDecrease the setting widthNon-linear opticsAcute angleDisplay device
The invention discloses a display panel and a display device. A binding area of the display panel is provided with a first bonding pad part; the first bonding pad part comprises at least two first subbonding pad parts and at least one second sub bonding pad part, or at least one first sub bonding pad part and at least two second sub bonding pad parts; the first sub-pad parts and the second sub-pad parts are alternately arranged in a second direction; each first sub bonding pad part comprises at least one first inclined section; the first first bonding pad and the last first bonding pad in thefirst inclined section are defined to form a first connecting line; each second sub-pad part comprises at least one second inclined section, and the first first pad and the last first pad in the second inclined section are defined to form a second connecting line; in the clockwise direction, the included angle between the second direction and the first connecting line is an acute angle; and in the anticlockwise direction, the included angle between the second direction and the second connecting line is an acute angle. According to the technical scheme provided by the invention, the narrow-bezel design of the display panel is realized.
Owner:XIAMEN TIANMA MICRO ELECTRONICS
Synchronous rectification driving module, synchronous rectification driving circuit and BUCK type voltage reduction circuit
ActiveCN112421937ALow costImprove system efficiencyDc-dc conversionElectric variable regulationDriver circuitHemt circuits
The invention provides a synchronous rectification driving module, a synchronous rectification driving circuit and a BUCK type voltage reduction circuit. A PMOS power tube is used as an upper tube ofthe synchronous rectification circuit, an NMOS power tube is used as a lower tube, and a PMOS power tube driving circuit and an NMOS power tube driving circuit are improved; wherein the PMOS driving circuit is powered by adopting a direct VCCGND; according to the PMOS drive circuit, the voltage of the grid drive end of the PMOS power tube is limited by adopting a method of limiting the voltage ofan M18 grid and enabling M18 and M19 to be matched for discharging, so the circuit structure is simplified while the drive capability is ensured; the NMOS driving circuit stabilizes the voltage of a grid driving end of the NMOS power tube by limiting the voltage of the base of the triode Q1, and ensures that the grid driving end of the NMOS power tube has enough drive capability by amplifying thecurrent flowing out of the M24 through the Q1 and Q2.
Owner:SHANGHAI XINLONG SEMICON TECH CO LTD
Fabrication method of grooved vertical double diffusion metal oxide semiconductor (VDMOS)
InactiveCN106158660AImprove breakdown voltageThe threshold voltage does not changeSemiconductor/solid-state device manufacturingDouble diffusionGate oxide
The invention provides a fabrication method of a grooved vertical double diffusion metal oxide semiconductor (VDMOS). The method comprises the following steps of depositing a hard mask layer on an N-type epitaxial layer; photoetching and etching an intermediate region in the hard mask layer to form a first groove window region; etching a lower-side region of the first groove window region, and forming a first groove in the N-type epitaxial layer; growing P-type epitaxy in an upper surface of the hard mask layer, the first groove window region and the first groove; removing the P-type epitaxy in the upper surface of the hard mask layer, the hard mask layer and the P-type epitaxy in the first groove window region by a chemical mechanical polishing process so as to form a P-type ion region in the first groove; respectively forming second grooves in partial regions at two sides of the P-type ion region in the N-type epitaxial layer; forming a grid oxide layer on an upper surface of the N-type epitaxial layer and a surface in the second groove; depositing a poly-silicon layer on the grid oxide layer in the second grooves; and forming a body region, a source region, a dielectric layer and a metal layer of the grooved VDMOS.
Owner:PEKING UNIV FOUNDER GRP CO LTD +1
Improved smectic phase light dimming glass
PendingCN105717713AReduce energy lossGuaranteed driving abilityNon-linear opticsHigh energyEngineering
The invention discloses improved smectic phase light dimming glass which comprises a first substrate layer, a liquid crystal mixed layer and a second substrate layer in an overlapped manner, wherein a surface, facing to the liquid crystal mixed layer, of the first substrate layer, and a surface, facing to the liquid crystal mixed layer, of the second substrate layer are both plated with flaky and long-strip shaped transparent electrodes; a plurality of electrode wires of which the resistance is smaller than that of the transparent electrode and current rapidly flowing through the electrode wires self can be rapidly spread to the transparent electrodes are uniformly distributed on the transparent electrodes; all electrode wires of each transparent electrode are connected with an extraction electrode; protecting layers are arranged on two surfaces of the liquid crystal mixed layer. Due to arrangement of the low-resistance electrode wires and design of the protecting layers, the problem of high-energy consumption of large-size high-resistance light dimming glass in the driving signal transmission process can be effectively solved, the problem of electrochemical corrosion in image display is solved, the image display effect of the light dimming glass is improved, and the service life of the light dimming glass is prolonged.
Owner:重庆汉朗精工科技有限公司
Automatic roll replacing device for non-woven fabric production
InactiveCN112408047AProductivity impactConsistent winding thicknessWebs handlingElectric machineStructural engineering
The invention discloses an automatic roll replacing device for non-woven fabric production. The automatic roll replacing device for non-woven fabric production comprises two supporting plates, whereinfixing plates are fixedly mounted on the two supporting plates through fixing rods, mounting rings are rotatably connected to the two fixing plates, a plurality of rotating grooves are formed in eachof the two mounting rings, a connecting plate is rotatably connected to the interior of each rotating groove, a connecting block is mounted on each connecting plate, a winding roller is mounted between every two connecting blocks corresponding to the left position and the right position in a matched mode, a driving motor is fixedly mounted on one of the supporting plates, and a driving rod is fixedly connected to the output end of the driving motor. The automatic roll replacing device has the advantages that when the device rolls non-woven fabric with a certain thickness, roll replacing operation can be automatically completed without stopping device operation, adverse effects on the production efficiency of the non-woven fabric can be avoided, the structure of the device is simple, electronic elements and electric energy do not need to be used as driving force in the roll replacing process, and the production and use cost can be reduced.
Owner:郭琼
A high-precision CNC milling machine
ActiveCN111266634BReduce productionGuaranteed processing effectMilling machinesFeeding apparatusReciprocating motionEngineering
The invention relates to the technical field of milling machine equipment, in particular to a high-precision numerical-control milling machine. The high-precision numerical-control milling machine comprises a base, a stand column, a saddle, a workbench and a controller, wherein one side of the base is provided with the stand column; a milling machine is arranged on the stand column; the fixed saddle is arranged on the base; the workbench is arranged on the saddle; the controller controls movement of the workbench through the saddle; a reverse gap is generated in a reciprocating motion processof a nut on a lead screw pair; pitch errors of a lead screw are accumulated to affect workbench positioning and moving precision, so that processing precision of the numerical-control milling machineis weakened, and therefore, one lead screw pair is arranged to separately drive the saddle to move in single direction, the nut only drives and feeds in single direction, influences of pitch errors are reduced while the nut is in two-way drive on the lead screw, generation amount of the reverse gap is reduced, influences on re-positioning precision are reduced, and processing effect of the high-precision numerical-control milling machine is ensured.
Owner:PAMA SHANGHAI MACHINE TOOL CO LTD
A rocker crawler mobile device
InactiveCN106342046BGuaranteed driving abilityImprove securityEndless track vehiclesTerrainRocker arm
In the field of safety equipment, the present invention provides a rocker crawler mobile device for robot operation. The device has the ability to adapt to all terrains. Arm track assembly, right main rocker arm, battery pack, left main rocker arm, control box, right support shaft, left support shaft, differential gearbox, right rear rocker arm track assembly, left rear rocker arm track assembly, left front rocker arm Composed of track components, the advantage is that the carrier always maintains two-point support, and is balanced by a differential mechanism, so that the four tracks can be in contact with the ground under any circumstances, and the driving ability of the robot is fully guaranteed by the motor drive, which also increases the safety of the mobile device. sex.
Owner:SHANGHAI AEROSPACE EQUIP MFG GENERAL FACTORY
High-side double-NMOS tube segmented driving system for GaN power tube
PendingCN113659966ASmall dVS/dt noiseSmall opening speedTransistorElectronic switchingPhysicsGate voltage
The invention discloses a double-NMOS segmented driving circuit for a high-side GaN power tube. In the starting process of the high-side GaN power tube, a dVS / dt detection circuit detects a VS rising slope and converts the VS rising slope into a control voltage Vctr, the Vctr controls the rising speed of the grid voltage of a pull-up NMOS by controlling the magnitude of the output current of a voltage-controlled current source, and the voltage of the grid voltage of the pull-up NMOS is controlled by the control voltage Vctr; therefore, the size of the grid driving current of the GaN power tube in the Miller platform period is adjusted; when the end of the Miller platform is detected, the gate voltage of the NMOS is lifted and pulled up through the charge pump, the gate driving current of the GaN power tube is maximized, the complete opening of the GaN power tube is accelerated, small dv / dt noise is realized, the high opening speed of the high-side GaN power tube is ensured, the circuit structure is easy to realize, and the occupied area is small.
Owner:无锡安趋电子有限公司
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