202results about How to "No fever" patented technology

The clutch of magnetohydrodynamics in centrifugal type is composed of input shaft, output shaft, magnetohydrodynamics, electromagnetic coil and clutching body, which consists of dish shell and sliding bock which can slide along radial direction under the action of centrifugal force to create effects of self-pressurizing for making shearing stress of magnetohydrodynamics a quite great increase. It has the characteristics of big driving torque and less power consumption comparing with the existing clutch of magnetohydrodynamics.

The invention discloses a digital electric-hydraulic synchronous control system, which comprises a hydraulic actuating mechanism, a digital synchronous control mechanism for performing synchronous control on the hydraulic actuating mechanism, an electric-hydraulic power source for providing power oil for the hydraulic actuating mechanism and the digital synchronous control mechanism, and an electric-hydraulic control system for controlling the power source and the synchronous control mechanism. The hydraulic actuating mechanism is a hydrocylinder; the electric-hydraulic power source comprises an oil storage tank, a double-acting hydraulic oil pump and a driving motor; the electric-hydraulic control system comprises a detector for detecting the oil pressure of the hydraulic oil pump and the rotating speed of the motor respectively and a variable frequency speed regulator and a controller for controlling the motor; and the digital synchronous control mechanism comprises a digital synchronization valve, a digital synchronization controller and a displacement transducer for detecting the displacement of an output shaft of the hydrocylinder. The digital electric-hydraulic synchronous control system has the advantages of simple structure, simple and convenient use and operation, good use effect, energy conservation and no oil leakage, and can achieve the aims of stepless speed regulation and high-precision synchronization according to operating characteristic requirements of different types of controlled objects.

A plane parallel type three-freedom-degree precise positioning work table has three flexible branched chains which are total the same in structure and respectively and correspondingly arranged on the inner sides of three equal sides of a base of a triangular structure and a movable platform arranged on the inner sides of the three flexible branch chains and arranged at the center of the base, wherein the base, the three flexible branched chains and the movable platform are integrally formed, the three flexible branched chains are in flexible connection with the base, displacement input ends of the three flexible branched chains respectively correspond to three included angles of the base, the movable platform is in flexible connection with the three flexible branched chains, a groove is formed between the inner side of each included angle of the base and the corresponding flexible branched chain, a piezoelectric ceramic driver is horizontally arranged in the groove, one end of the piezoelectric ceramic driver is in hertz contact with the displacement input ends of the flexible branched chains, and the other end of the piezoelectric ceramic driver is fixedly connected on the base through bolts. The plane parallel type three-freedom-degree precise positioning work table is compact in structure, flexible to control, high in static and dynamic stiffness, high in kinematic accuracy, low in inertia, free of error accumulation, free of friction and heating and fast in responding.

The invention discloses an SOI wafer-based MEMS structure manufacturing and dicing method, which belongs to the field of the micromachining of a micro-electromechanical system and the dicing of a wafer. The method adopts key points that: the high aspect radio effect of ICP corrosion is utilized, and an MEMS structural mask and a mask corresponding to the MEMS structural mask are adopted to perform a conventional MEMS machining process on the front and back surfaces of the SOI wafer; and the machining process comprises glue spreading, photo-etching, corrosion, release and the like to synchronously finish manufacturing an MEMS structure and dicing the wafer. The SOI wafer-based MEMS structure manufacturing and dicing method has the advantages of (1) having no mechanical vibration, no stress damage, no heating, no shavings, no pollution and high rate of finished products, (2) not needing expensive dicing equipment, finishing manufacturing the MEMS structure and dicing the wafer on the basis of conventional MEMS process equipment and having low cost, (3) synchronously finishing the MEMS manufacturing process and the dicing process so as to obtain high efficiency, and (4) not needing to add a temporary or permanent protective layer, not influencing interaction between the equipment and external information, finishing the release at the same time of dicing and not damaging an MEMS movable structure in an intermediate process.

The invention discloses a sensing ring of an all-fiber electronic current transformer, which consists of a sensing ring body, a sensing ring upper cover, a sensing optical fiber, a reflector, a 1 / 4 wave plate and a polarization-preserving fiber, wherein both the sensing ring body and the sensing ring upper cover have an annular structure, a U-shaped groove is preserved on the upper surface of the sensing ring body and the sensing optical fiber is wound at the bottom surface of the U-shaped groove uniformly; the sensing ring upper cover is fixed on the upper part of the sensing ring body and closes the U-shaped groove; and the reflector and the 1 / 4 wave plate are positioned on two ends of the sensing optical fiber respectively and fixed in the U-shaped groove, the reflector and the 1 / 4 wave plate are parallel in the direction of the tangents of the annular structures and arranged in a way of clinging together along the direction of the normal of the annular structures, and the tail end, fixedly provided with the 1 / 4 wave plate, of the sensing optical fiber is connected with the polarization-preserving fiber which serves as the leading-out end of the sensing ring. The sensing ring has the characteristics of flexible application mode, small volume, light weight, high safety, convenient installation and maintenance and the like and provides a necessary guarantee for the development and application of the all-fiber electronic current transformer.

The invention discloses a technological method for preparing methanol by combining coke oven gas with water gas. The method comprises the following steps: purifying coke oven gas; performing direct fine desulfurization and purification to water gas at a low temperature; mixing the cleaned and qualified coke oven gas and water gas to ensure the mixed gas to reach a hydrogen carbon ratio that (H2 - CO) / (CO2 + CO) = 2.05-2.10, pressurizing the mixed gas, and sending the mixed gas into a methanol synthesis tower for synthesizing methanol at low pressure. The method of the invention avoids the problem of serious imbalance of hydrogen carbon ratio in the process of preparing methanol by only using coke oven gas, the methanol one-step conversion is increased, the utilization rate of effective ingredients is increased, the production cost is reduced; the problem of low sulfur capacity of the existing catalyst to the organic sulfur such as CS2 and COS is solved, the technological process has no cold-hot fatigue, finally the total sulfur content of water gas can reach 0.1ppm or more; and the technological method of the invention designs a difunctional ventilation gas-recycling device so that one device can be used to realize two purposes.

The invention is concerned with permanent-magnet clutch equipment, relating to main axis and driven axis, connecting with main and driven turntables, main and driven springs, axis-joining wheel, operate perch and wheel, bearing frame, main and driven inside and outside magnetism blocks. When the main axis is moving, the main and driven inner and outside magnetism blocks work through gas-gap magnetism induction action, and the magnetizations direction to south and north poles of the main and driven inner and outside magnetism blocks is the radial, the amount is same even and the south and north poles are opposite located towards to the middle to produce the attracting and excluding shear around the movement direction of axes between the main and driven magnetism blocks that moves in synchronous according to shear. The radial suction face and excluding power face is same between the main and driven magnetism blocks to balance the attracting and excluding shear along the movement direction of axes. The main and driven magnetism blocks do not drive the revolving and driving force, so the revolving and driving force can joint and separate with each other between the main and driven axes.

The invention relates to a preparation method of azotized graphene lithium ion power battery slurry. The preparation method mainly comprises the preparation of azotized expanded graphite and azotized graphene lithium ion power battery slurry. The preparation method comprises the steps of firstly, introducing a nitrogen increasing agent in the expandable graphite and expanded graphite preparation process, and azotizing to obtain azotized expanded graphite; and secondly, preparing azotized graphene by taking the azotized expanded graphite as the raw material, and introducing substances such as a dispersing agent, a conductive agent, active materials and a binder in the preparation process so as to obtain the azotized graphene lithium ion power battery slurry. According to the preparation method, azotized graphene or the compound of azotized graphene and other conductive additives is adopted as the conductive additive of the lithium ion power battery slurry, the high-temperature cycle performance, high-temperature storage performance and high-rate discharge performance are further improved; on the other hand, the preparation of azotized graphene and the dispersion of the lithium ion power battery slurry are implemented simultaneously, and the problem that graphene cannot be dispersed easily in the application process can be solved.

The invention discloses a non-contact transporting and positioning platform device and a control method. The device comprises a transporting platform, a fixing platform located below the transporting platform, and a base located below the fixing platform. The fixing platform is connected with the base through a fixing platform support. The transporting platform is provided with a plurality of grooves. Each groove is provided with an air inlet hole and an air outlet hole. Each air outlet hole is connected with an air inlet hose. Each air inlet hose is connected with a positive-pressure air source. Each air outlet hole is connected with an air outlet hose, and each air outlet hose is connected with a negative-pressure air source. According to the non-contact transporting and positioning platform device, due to the fact that air is in a horizontal flowing state in the grooves, the airflow viscosity force can be utilized to the maximum degree to drive a workpiece to move, the high motion acceleration is obtained, and complete non-contact can be truly achieved. When airflow makes contact with the semiconductor workpiece, static pollution is not likely to be generated, and stress concentration is not likely to be caused near a contact point.

The invention relates to an andrographis paniculata atomization inhalation solution preparation, and belongs to the field of pharmaceutical pharmacy, wherein the andrographis paniculata atomization inhalation solution preparation comprises (1) an andrographis paniculata effective component, and (2) an isotonic agent and a solvent. According to the present invention, the prepared andrographis paniculata atomization inhalation solution preparation makes up for the gap in the current domestic market, and is specifically designed for atomization inhalation patients, wherein the andrographis paniculata atomization inhalation solution preparation is directly inhaled into the respiratory system in an atomized form after the andrographis paniculata atomization inhalation solution preparation is atomized by an ultrasonic atomizer or an air compression type atomizer, such that the use is convenient; and compared to the andrographis paniculata oral liquid, the andrographis paniculata atomizationinhalation solution preparation of the present invention has the different administration route, has advantages of use dose reducing, rapid effect and improved safety, and can well treat upper respiratory tract infections, sore throat, cough with lung heat and the like.

The invention discloses an electrochemical super capacitor and a manufacturing method thereof. The manufacturing method for the super capacitor comprises the following steps of: (1) superposing a first pole piece, an outer diaphragm, a second pole piece and an inner diaphragm from outside to inside in turn, and coiling the components to manufacture an electrode coiled core of which two ends are provided with outstretched electrode lugs; (2) compacting the electrode lugs at the two ends of the electrode coiled core, fixedly connecting the compacted electrode lugs to a packing block respectively, and assembling the electrode lugs with a shell by adopting a cold-hot mixed assembling mode; (3) sleeving an insulating washer on the packing block, then matching and connecting the packing block with the lower part of an end cover, sleeving a seal ring on the lower part of the end cover, and sleeving an insulating washer on the upper part of the end cover; and (4) forming a rolling groove on a part of the shell corresponding to a gap between the packing block and the end cover, compacting the inner wall of the roller groove to the seal ring and the insulating washer, and then packaging the components to manufacture the electrochemical super conductor. The manufacturing method provided by the invention is simple and is suitable for industrial production, and the electrochemical super conductor manufactured by the method has small internal resistance and good insulating property, is difficult to generate heat and is suitable for high-power application.

The invention discloses a glass substrate air flotation device with a deformation detection function. The glass substrate air flotation device comprises a transporting platform, a fixed platform and a base. The fixed platform is connected with the base through supporting columns. Driving devices used for driving a glass substrate to move are arranged on the two sides of the transporting platform. The transporting platform is provided with a plurality of conveying air holes arranged evenly. A sintered metal porous material is embedded in the top end of each conveying air hole. The bottom of each conveying air hole is connected with an air conveying pipe. The air conveying pipes are connected with a pressure reduction valve through a flowmeter. The pressure reduction valve is connected with an air source through a hose. At least two small holes are formed in the periphery of each conveying air hole of the transporting platform, the bottom of each small hole is connected with a pressure sensor through an air pipe, and the pressure sensors and the signal output end of the flowmeter are connected with an input conversion module. The glass substrate air flotation device with the deformation detection function has the advantages of being clean, free of pollution, heating and magnetism generation and the like, and a pneumatic system is easy to maintain and simple in structure.

The invention discloses a traditional Chinese medicine composition for treating Crohn's disease. The traditional Chinese medicine composition for treating Crohn's disease is prepared from red sage root, red peony root, white peony root, rhizoma atractylodis macrocephalae, stir-fried Chinese angelica, safflower, ligusticum wallichii, pilose asiabell root, mix-fried fructus aurantii, costusroot, dried orange peel, pinellia ternate, licorice, coptis and charred triplet. The traditional Chinese medicine composition can be used for treating Crohn's disease in clinical.

The invention discloses a running-state monitoring method for an electric reactor in a high-voltage power capacitor device assembly, and belongs to the technical field of substation-device on-line monitoring. The running-state monitoring method is characterized by including the following steps that 1001, starting is carried out; 1002, a voltage signal of a substation-bus voltage transformer is obtained; 1003, the running voltage of a high-voltage parallel electric reactor is obtained; 1004, a current signal of a line-discharging-switch-cabinet current transformer is obtained; 1005, inductive reactance and the reactance rate of the electric reactor are obtained; 1006, the change rates of the inductive reactance and the reactance rate of the electric reactor are obtained; 1007, the step 1008 is carried out in the serious state, otherwise the step 1009 is carried out; 1008, a tripping order is emitted; 1009, the step 1010 is carried out in the abnormal state, otherwise the step 1011 is carried out; 1010, alarm is carried out; 1011, running continues to be carried out. On-line monitoring of the electric reactor is achieved, the defect that the reliability is poor when powering-off detection is carried out in the prior art is overcome, and the working safety of the electric reactor and the working safety of the high-voltage power capacitor device assembly are greatly improved.

The invention provides a method for centering the shafting of a reamer of a dredger, solving the problems in the prior art, such as low installation accuracy, high working difficulty, high workload and longer installation period. According to the technical scheme, the method comprises the following steps: a. looking for a shafting theoretical center line; b. mounting a laser transmission device; c. placing a plurality of fulcrum bearing blocks, and regulating each fulcrum bearing block according to the laser line; and d. mounting a reamer shaft and an intermediate shaft, and connecting the whole shafting. All data after the mounting of the reamer shafting is within the calculation requirement range and the reamer shafting also passes an austere dredging test trial; the shafting and each device are in a good working condition without abnormal vibration or noise, no bearing has an obvious heating phenomenon, and the design requirement is reached.

The invention provides a portable testing terminal and belongs to the technical field of terminal devices. The portable testing terminal includes a fixture, a supporting seat, sockets, probes and an auxiliary fastener. The supporting seat is an insulating workpiece. The sockets and the probes are individually conductors. The fixture is in fixed connection with the supporting seat which is provided with a plurality of sockets. One end of each socket is connected to probes. The fixture is symmetrical relative to the supporting seat. The fixture includes insulating bayonet parts each of which is fit to the shape of a sidewall of a terminal row, and also includes fixture arms each of which is connected to one insulating bayonet part. A front end part or a rear end part of the fixture is provided with the auxiliary fastener. According to the invention, the testing terminal, in conditions when original wiring is not removed from the terminal row, can be successfully added to a testing wiring and continues corresponding test, which saves time of secondary testing and increases safety of secondary testing.

The invention provides an automobile brake system cooling device. air compressor of an air conditioner is used; a high-pressure plastic pipe is communicated with the cold output terminal of the air compressor and the other end thereof has four or six branch pipes; alternatively, the number of the pipe at the other end thereof is determined according to the number of brake hub of the automobile tyre; the pipe head is respectively provided with a sprinkler; the nozzle of the sprinkler is respectively aligned to the tyre brake hub and the brake sheet position or position in the automobile brake device easy to be heated due to the friction of the brake. A thermistor switch is used for monitoring and controlling the temperature when the hub runs, with the method as follows: the thermistor is arranged at the brake hub position; the working range of the thermistor switch is adjusted; the thermistor switch and the air compressor switch are connected with each other by wires; when the thermistor switch is turned on, the air compressor switch is also turned on; when the thermistor switch is turned off, the air compressor switch is also turned off.

The invention relates to a battery connector for an electric vehicle. The battery connector is applicable to being used as a lithium battery discharge connector (plug and socket) for the electric vehicle and an electric passenger car. The battery connector comprises a connector plug and a connector socket, wherein the connector plug comprises a plug shell, a seal cover, a plug insulating installation plate, a power plug and signal communication plugs; locking pins are arranged at two sides of the upper part of the plug shell; the connector socket comprises a socket shell, a socket insulating installation plate, a lock catch, a power socket and signal communication sockets; connecting pin holes are formed in two sides of the upper part of the socket shell; the lock catch is movably connected with the upper part of the socket shell through connecting pins and the connecting pin holes; the lock catch is provided with a lock catch clamping groove; a hand shank is arranged on the lock catch; after the connector plug is inserted into the connector socket, the lock catch clamping groove is clamped and inserted into the locking pins at two sides of the upper part of the plug shell of the connector by stirring the hand shank; and the connector plug is tightly locked on the connector socket, and does not become loose in vehicle travelling and charging processes.

The invention provides a metallic wiring etching solution, containing ammonium persulfate, 0.1-30% weight ratio of organic acid, 0.01-5% weight ratio of phosphate and azole compounds.

The invention relates to a semi-automatic detection device for fluorescent magnetic powder of bolts; its characteristic is that the device adopts a chain transmission mechanism, and each connection plate connected on the outer circumference of the chain is respectively equipped with two lower electrodes, and each lower electrode is equipped with There is a strong magnet, and the bolt workpiece is arranged on the strong magnet of the lower electrode; the stand is equipped with an automatic lifting arm, and the lifting arm is equipped with a lifting cylinder and four micro-moving cylinders, and the piston rod of the lifting cylinder is equipped with a longitudinal axis. Magnetizing coil, two upper electrodes respectively equipped on the extension shaft of the piston rod of each micro-moving cylinder are arranged in the longitudinal magnetizing coil, two rows of eight upper electrodes correspond to the row spacing of the lower two rows of lower electrodes respectively; this device adopts One-time flaw detection of eight workpieces each time, the detection speed is fast and the efficiency is high, which greatly improves the work efficiency and brings great economic benefits to the enterprise. It is safe, reliable, time-saving and convenient, and has strong competitiveness in the market.

The invention discloses a charging system of electronic equipment and a charging base of the electronic equipment. The charging base comprises the following components of: a power source input interface which is used for connecting an external power source supplying device; a control unit of which the input end is connected with the power source input interface; and an electrode which comprises a first electrode plate and a second electrode plate, wherein the first electrode plate is connected with a first output end of the control unit, and the second electrode plate is connected with a second output end of the control unit. With the charging system and the charging base of the electronic equipment of the invention adopted, charged equipment can directly contact with the charging base, such that power transmission can be realized, and a charging process of the charged equipment can be accomplished, and in the charging process, power conversion efficiency is high, and no heat is emitted, and the service life of a battery will not be affected; with direct charging realized, a charging speed can be very fast; electromagnetic and magnetoelectric conversion devices are not required to be set, and therefore, the product is low in cost and convenient to carry; and at the same time, short-circuiting will not occur between the electrode plates, and charging is safe, and a requirement for a setting position of a charging electrode of the charged equipment is low.

The invention belongs to the field of Chinese medicinal preparations, and particularly relates to a Chinese medicinal preparation for treating acute lymphadenitis, which is characterized by being prepared from the following raw materials in part by weight: 3 parts of common andrographis herb, 2 parts of weeping forsythia, 3 parts of scrophularia root, 3 parts of mongolian dandelion herb, 2 parts of root of red-rooted salvia, 1 part of angelica dahurica and 2 parts of spreading hedyotis herb. The Chinese medicinal preparation is developed by combining clinical practices on the basis of the conventional differential treatment in traditional Chinese medical science, and by combining the medicaments, the Chinese medicinal preparation for treating the acute lymphadenitis has the effects of clearing heat and detoxicating and relieving swelling and eliminating stagnation, has the characteristics of obvious curative effect, quick response, high cure rate, relapse prevention and the like, and does not have toxic or side effect.

The invention discloses a novel wind generating set bus duct. The novel wind generating set bus duct comprises a bus duct body and adaptor boxes arranged on the two ends of the bus duct body, the bus duct body comprises a shell and three bus units, the shell is made of aluminium magnesium alloy, the three bus units are arranged in an inner cavity formed by the shell and are fixed in the shell through insulating supports, four pipe buses made of aluminium alloy are arranged in each bus unit, each pipe bus is sleeved with an insulating layer, the corresponding pipe buses of the bus units are connected with one another through flexible bus units in a cone mode and are fixed through flanges, joints are provided with temperature monitoring devices, and the bus duct body is arranged on the wall of a tower through an elastic support. The novel wind generating set bus duct is simple in structure, low in impedance, pressure drop, energy consumption and cost, and high in use reliability, solves the problems that traditional bus duct connection units can not bear long-time shake of the tower, and is unreliable in electric conduction, and further overcomes the defects that a rectangular aluminium bus is large in pressure creep deformation, the surface is oxidized easily, and the connection portions have poor contact to cause accidents.

The invention discloses a hydraulic lock with pilot one-way valve comprising a valve (1), a piston (2) and an inserting polit one-way valve. The top of one end of the valve (1) is provided with an oil port I (3), the bottom of the other end of the valve (1) is provided with an oil port II (4), and the valve (1) is provided with through holes; the inserting polit one-way valve comprises a valve cover (5), a valve sleeve (6), a main valve core (7), a main valve core spring (8), a pilot valve core (9) and a pilot valve spring (10); a through hole I (11) is provided with an annular groove (12) inside, the bottom of the pilot valve core (9) is provided with a conical structure as same as a pilot valve seat (16), the main valve core (7) is provided with a throttle small hole (18) communicating a through hole II (15) and the annular groove (12). The hydraulic lock has the advantages that structure is simple, size is small, service life is long, weight performs steady descending motions, system power consumption is small, and the system heats rarely.

The invention relates to the technical field of magnetic refrigerating, and discloses an efficient heat exchanging type cold storage bed system for a magnetic refrigerator. The system comprises a cold storage bed I, a cold storage bed II, a heat exchanging water tank and a heat exchanger, wherein the cold storage bed I and the cold storage bed II are filled with porous magnetic refrigerants; magnetic fields for magnetizing and demagnetizing the magnetic refrigerants are arranged at the outer sides of the cold storage bed I and the cold storage bed II; a valve set A and a valve set B are correspondingly arranged at two ends of the cold storage bed I; a valve set C and a valve set D are correspondingly arranged at two ends of the cold storage bed II; each of the valve set A, the valve set B, the valve set C and the valve set D comprises an one-way magnetic flux valve and an one-way stop valve; a water pump is arranged at a water outlet of the heat exchanging water tank; and the heat exchanging water tank, the cold storage bed I, the cold storage bed II and the heat exchanger are full of heat exchanging mediums. According to the efficient heat exchanging type cold storage bed system for the magnetic refrigerators, low-temperature heat exchanging mediums and high-temperature heat exchanging mediums are circulated through unique ways and cannot be mutually mixed, so that the refrigerating effect can be improved.

The invention discloses a heat conduction fiber-based tank infrared stealth system comprising a heat source, heat conduction fibers, a thermoelectric generation module, a power source, a control module and a cooling module, wherein a plurality of heat conduction fibers are connected with heat sources arranged at different positions in a manner that one end of each heat conduction fiber is connected with one heat source, the other end of each heat conduction fiber is connected with a heat-absorbing face of the thermoelectric generation module, a heat dissipation device is arranged on a cooling end of the thermoelectric generation module, and an electric fan is arranged on a side of the heat dissipation device; a speed regulator is connected with the power source, an industrial control computer and the electric fan; a temperature sensor is connected with the industrial control computer, a relay device is connected with the industrial control computer and the thermoelectric generation module. According to the heat conduction fiber-based tank infrared stealth system, heat of heat sources arranged at different parts of a tank can be conducted to the thermoelectric generation module via the heat conduction fibers, compulsory convection and heat radiation can be realized via the electric fan, and centralized management of heat sources can be realized via the control module; problems that centralized heat management is difficult to realize due to wide distribution of different heat sources, that afterheat cannot be used effectively, and that the temperature of different parts of the tank cannot be detected in real time and other problems can be addressed.

The invention discloses a tool special for assembling and disassembling a contact finger of a disconnecting switch. The tool comprises a bottom plate, a first upright plate, a second upright plate, a rotating shaft, a first contact finger clamping device, a handle, a second contact finger clamping device and a toothed plate baffle plate, wherein the first upright plate and the second upright plate are fixedly and oppositely arranged on the two sides of the right side of the bottom plate; the rotating shaft penetrates through the first upright plate and the second upright plate; the first contact finger clamping device is sleeved on the rotating shaft; the handle is fixedly arranged on the first contact finger clamping device; the second contact finger clamping device is fixedly arranged on the left side of the bottom plate; the toothed plate baffle plate is arranged between the first contact finger clamping device and the second contact finger clamping device; the first contact finger clamping device and the second contact finger clamping device are provided with clamping components used for clamping the contact finger; and when the handle is rotated, the first contact finger clamping device can be rotated along the rotating shaft. By adopting the tool, the cooperation among the contact finger, a compression spring, a pin and a toothed plate can be enhanced, and an opening of the contact finger can be pressed open with less effort.

The embodiment of the invention discloses a display screen and a backlight drive method of the display screen, belonging to the field of drive circuit. With the arrangement of a power chip and a peripheral circuit, when input voltage of the circuit is higher than output voltage of the circuit, the circuit operates in a BUCK state; and when the input voltage of the circuit is lower than the output voltage of the circuit, the circuit operates in a BUCK-BOOST state, and enable output voltage feedback of the circuit to be in parallel connection with loads of the circuit. With the adoption of the circuit and method provided by the invention, constant voltage output of the circuit through automatically switching the circuit states is realized no matter whether the input voltage of the circuit is higher than the output voltage of the circuit, and the overall efficiency is high, and the heating phenomenon cannot be generated.

The invention relates to an active electronic photoelectric current transformer high-voltage side power supply device, belonging to the field of power system technique; the device of the invention comprises a circuit A which consists of a first high-voltage energy storage coil, a first energy leakage protection circuit and a voltage processing circuit a which are sequentially connected one after another, a circuit B which consists of a second high-voltage energy storage coil, a second energy leakage protection circuit and a voltage processing circuit b which are sequentially connected one after another, and a laser component which is connected with the circuit B. The device of the invention has the advantages of small volume, compact structure, simple insulation encapsulation and safe usage, and can ensure the electronic transformer to work normally and continuously within an extremely great current range.