1391results about How to "Prevent breakdown" patented technology

A high-voltage transistor device has a substrate, an isolation structure, a source, a gate, a drain, a plurality of doped regions, a plurality of ion wells, and a first dielectric layer disposed on the substrate. The high-voltage transistor device further has a first conductive layer and a plurality of first field plate rings. The first conductive layer is electrically connected to the drain and at least one of the first field plate rings.

The bottom layer of invention uses aluminium baseboard; the intermediate layer is a heat conduction insulation layer; the surface layer is an electric conduction layer. It features the following: the heat insulation layer is a ceramic-like thin film layer with 10-400 micron thick and >=100Momega insulation resistance, which chemical composition is aluminium oxide. The preparation method comprises: making pretreatment, de-oiling and washing for the surface of the aluminium baseboard using mechanical method or chemical method to form a clean workpiece plane; using the microarc oxide treatment and the microplasma surface ceramic method to make a heat conduction insulation layer on the workpiece surface; finally, overlapping an electric conduction layer on the heat conduction insulation layer; etching circuit pattern.

This invention discloses a surface treatment method for Mg-based material. The method comprises: (1) performing micro-arc oxidation treatment on Mg or Mg alloy work piece as the anode in a Cl--free alkaline micro-arc oxidation electrolyte; (2) activating; (3) performing preliminary chemical plating of Ni; (4) performing chemical plating of Ni; (5) performing thermal treatment. The micro-arc oxidation treatment comprises: (1) applying a positive pulse with an average current density of 5-20 A/dm2 until the voltage is automatically elevated to a critical value, and applying a constant working voltage of 50-80 V (total time = 5-30 min); (2) applying a positive pulse of 30-300 V and a negative pulse of 0-200 V with an average current density of 0.5-15 A/dm2 (total time = 10-60 min). The activation comprises: (1) performing anode alkaline coarsening treatment for 3-10 min; (2) performing surface activation treatment; (3) performing cathode alkaline electrification reduction activation treatment; (4) performing cathode acidic electrification dispergation activation treatment. The treated Mg alloy work piece has high corrosion resistance of ceramic materials and the properties and touch sense of metal materials.

Provided is a battery pack that can uniformly cool a plurality of electric cells, prevent a breakdown of the electric cells, and provide high performance of all electric cells. The battery pack includes a packaging case in which: each adjacent ones of a plurality of electric cells in the first direction define a ventilation space; first and second passages are defined that extend in the first direction and that are arranged to have the plurality of electric cells located between the first and second passages in a second direction intersecting the first direction, wherein gas supplied to the first passage flows through the ventilation spaces to the second passage; and a flow rate limitation device is provided that is arranged in an upstream area of the first passage and that limits a flow rate of the gas flowing through one of the plurality of ventilation spaces, which leads to the upstream area of the first passage, to a predetermined flow rate.

A vertical-cavity surface-emitting (VCSEL) device has a layer structure including a top DBR mirror, an active layer, a current confinement oxide layer, and a bottom DBR mirror, the layer structure being configured as a mesa post. The current confinement oxide layer has a central current injection area and a peripheral current blocking area oxidized from the sidewall of the mesa post. The mesa post has a substantially square cross-sectional shape, thereby allowing an oxidation heat treatment to configure a substantially circular current injection area in the current-confinement oxide layer.

The invention relates to a solution to a working power supply and the power of a two-wire-system electronic switch, relating to the field of illuminating electronic switches. The two-wire-system electronic switch comprises an off-state electrification circuit, a switch executive circuit, an on-state electrification circuit, and the like, wherein when loads are closed, the off-state electrification circuit supplies working electric energy for the electronic switch and also eliminates the sparkling phenomenon of a load lamp; the switch executive circuit is used for executing the starting or the closing of the loads, not only has low power consumption, but also provides the switch state indication; and when the loads are started, the on-state electrification circuit provides a heavy current path for the loads and also supplies the working electric energy for the electronic switch. The invention not only solves the problem on the working power supply of the two-wire-system electronic switch, but also enhances the loading capacity of the two-wire-system electronic switch.

The invention discloses Beidou and GPS (Global Positioning System) dual-mode timing embedded time synchronization equipment and a software design method. The Beidou and GPS (Global Positioning System) dual-mode timing embedded time synchronization equipment takes a programmable logic device, a Beidou receiver, a GPS receiver and an embedded microcontroller as a core, and is also provided with an external hardware circuit integrated serial port, an IRIG-B (Inter-Range Instrumentation Group) code input isolation module, an IRIG-B (DC(Direct Current)) code differential output module, an IRIG-B (AC(Alternating Current)) code hardware output module and an IRIG-B (AC) code input decoding module, wherein the embedded microcontroller is connected with an embedded key and a liquid crystal display; an IRIG-B code system is designed by utilizing the programmable logic device and the embodied microcontroller; the current modes, the current time information and the mode states of the five modes, namely, GPS, Beidou, DC code decoding, AC code decoding and time keeping are integrated into a code stream, is transmitted to the embedded microcontroller, is subjected to serial port processing, and is displayed on the liquid crystal display; the requirement on integrating the functions of multi-satellite timing, high-precision time synchronous code encoding outputting and inputting decoding, as well as real-time time information display and mode switching is met.

A vacuum high temperature heater tube includes a refractory steel outer guard tube and a hot wire, in which, a mixed filling layer is set between the surrounding of the hot wire and the guard tube, a seal casing cap is set at the line end, an insulation porcelain base is set out of the seal casing cap, a screw cutting sleeve is set at the outer end of the insulation porcelain base and the back of the cutting sleeve is fixed to the outer wall of the guard tube. The production technology includes: cleaning the guard tube, drying, removing hydrogen, winding the carbon hot wire on a stainless steel rod in twist and putting it at the center of the guard tube, filling a matched MgO compound material uniformly and vibrating it to draw out the stainless steel rod steadily to be filled, shrinking the tube, heating it to 150deg.C for 1 hour to be vacuumed and removing moisture till 500Kohm insulation resistance, filling a seal casing cap, pressing tightly the insulation porcelain base with the screw cutting sleeve to be welded with the outer wall of the guard tube, shaping, testing and verifying and packing the product.

An apparatus for sensing leakage current of a battery includes a voltage distribution node installed on a first conductive line connecting both terminals of a battery; first and second switches installed between the voltage distribution node and positive/negative terminals of the battery; an insulation resistance and a current sensing resistance installed on a second conductive line connecting the voltage distribution node to a ground; a DC voltage applying unit for applying positive/negative DC voltage to a ground-side end of the current sensing resistance to induce potential difference between the voltage distribution node and the DC voltage applying node; and a leakage current determining unit for sensing magnitude of electric current flowing through the current sensing resistance according to the induced potential difference in turning-on state of the switches, and then determining leakage current by checking whether the magnitude of electric current is out of standard level over threshold value.

The invention discloses a liquid crystal display and a control method thereof. A time schedule controller is used for detecting an external frequency signal of the liquid crystal display, and a switching control signal is output according to the external frequency signal to start a power-off switching circuit, so that the power-off switching circuit controls the output voltages of a gamma voltagegenerator and a common voltage circuit according one of the messages of the switch control signal respectively; thus, the voltage difference between a pixel electrode of a pixel and a common electrode is regulated to reach zero to completely release the pixel loads after the power off so as to realize the aim of instantly eliminating shutdown images.

The invention discloses a biasing circuit suitable for a low noise amplifier. The biasing circuit is connected with a common source NMOS (N-channel metal oxide semiconductor) pipe in the low noise amplifier and two pins externally connected with a grid electrode on a common gate NMOS pipe. The biasing circuit is characterized by being formed by connecting and combining 1-12 MOS (metal oxide semiconductor) pipes (401-406, 410-415), 1-8 resistors (416-423) and 1-3 diodes (407-409). The biasing circuit suitable for the low noise amplifier has an enabling control function and can provide two modes of output bias, wherein in the first mode, the bias is provided in a working mode of the low noise amplifier, temperature compensation and voltage compensation of superwide range are realized, namely the condition that noise coefficients and gains of the low noise amplifier do not fluctuate along with the temperature and power voltage; and in the second mode, the other bias is provided in an idle mode of the low noise amplifier, reliability compensation is realized, so that the condition that a transistor is broken down is prevented. With the adoption of the biasing circuit suitable for the low noise amplifier, the complexity of the circuit can be greatly reduced, and the chip area and cost are reduced.

An object of the invention is to prevent breakdown of a decoder buffer, and shorten a time required for a multiplexing operation. A multiplexing pattern generator 56 generates a multiplexing pattern signal indicating the order of types of data to be multiplexed. A video remaining size calculator 33 and an audio remaining size calculator 43 calculate, as a remaining size, the size of multiplexable data of an elementary stream. A video packet generator 32 and an audio packet generator 42 generate a multiplex packet containing transmission data of a predetermined size, based on the multiplexing pattern signal and the remaining size. A multiplexer 51 generates a multiplexed stream. The video remaining size calculator 33 and the audio remaining size calculator 43 calculate the remaining size, based on the data size per access unit and the transmission size of transmission data. The video packet generator 32 and the audio packet generator 42 generate a multiplex packet, if the data type indicated by the multiplexing pattern signal shows matching, and the remaining size is equal to or larger than the transmission size.

A light source driving circuit for driving a light emitting element comprises a power supply circuit, a light adjusting circuit, and a feedback circuit/control circuit, wherein the power supply circuit is coupled with one end of a light emitting element; the light adjusting circuit is coupled with the other end of the light emitting element; and the feedback circuit/control circuit is coupled between the power supply circuit and the light adjusting circuit. When the light source drive circuit turns off the power supply circuit to stop supplying power to the light emitting element, the feedbackcircuit/control circuit delays the time point for switching off the light adjusting circuit so as to prevent the light adjusting circuit from being broken down by over-high voltage.

The invention discloses a dust-removing air purifier with double functions of anion sedimentation and high-voltage electrostatic adsorption. The dust-removing air purifier comprises a casing as well as an anion emission needle plate, a stacked high-voltage electrostatic cell, a positive pole filtering body and a fan which are sequentially arranged, wherein anion emission needles which discharge towards the positive pole filtering body and form potential difference with the positive pole filtering body are arranged on the anion emission needle plate, the stacked high-voltage electrostatic cell comprises negative plates and positive plates, an air channel is formed between each negative plate and the adjacent positive plate, each negative plate comprises two insulators with high resistance and high voltage resistance and a conductor which is located between the two insulators and has low resistance, and the positive plates have electrical conductivity and can lead out charges carried by electronegative particles directly contacted with the positive plates in the air channels. According to the dust-removing air purifier, the wind resistance is low, the use noise is small, frequent cleaning is not required, single air purification efficiency is high, bacteria and viruses in air can be killed, the problems about wall blackening and influence on human health are solved, and secondary pollution caused by starting up is avoided.

The invention provides a sample heating apparatus used for a rock impact experiments as rock SHB and combined static-dynamic load and the like. and belongs to the rock mechanics study field. The apparatus comprises an adjusting slideway (9), a locating bolt (10), a resistance wire (11), leveling bolts (12), a bracket (13), a power-supply switch (14), an adjustable insulation bin-door (15), a thermocouple access hole (16), a heating cavity (17), a carbon-fiber reinforced alloy cylinder (18) and an insulation bin (19). The invention adopts the anti-impact and anti-high-temperature carbon-fiber reinforced alloy cylinder, the adjustable insulation bin-door and four leveling bolts at the seat of the apparatus to realize the synchronous processes of preserving the constant high temperature and the loading of impact stress wave during the rock impact experiment. The invention provides a special experimental apparatus for the further rock mechanics study.

The invention relates to a digital intelligent driving device of a high-power IGBT (insulated gate bipolar translator). The digital intelligent driving device comprises a DC/DC (direct-current) conversion circuit, a CPLD (complex programmable logic device) logic control module, an active clamping feedback module, a retreating-protection over-current feedback module and a two-stage di/dt detecting module, wherein the output end of the DC/DC conversion circuit is connected with an undervoltage protection module; the output end of the undervoltage protection module is connected with the CPLD logic control module; and the input end of the CPLD logic control module is connected with a PWM (pulse-width modulation) pulse-width modulator, and the output end of the CPLD logic control module is connected with a variable-gate resistance module. The digital intelligent driving device provided by the invention has the advantages that the protection functions such as power isolation, over-current protection, di/dt and active clamping are integrated, the logic control is realized by adopting the programmable logic device CPLD, the ideal driving performance is achieved by real-time variable-gate resistance driving, and soft shut-off is realized by selecting proper shut-off resistance according to the over-current degree, so that the switching loss is effectively reduced and a Miller effect is weakened.

An embodiment of the invention provides an array substrate, a display panel and a display device, aiming to solve the problem that when the existing display panel is squeezed or rubbed, a great quantity of electric charges can be accumulated in integrated circuits thereof to be even possible to break down the same, thereby resulting damages to the integrated circuits in the display panel. The array substrate comprises multiple data lines and multiple gate lines; at least one data line is connected with a first lead on the array substrate through at least one first electrostatic discharger, each first electrostatic discharger is connected with one data line only; or at least one gate line is connected to a second lead on the array substrate through at least one second electrostatic discharger, and each second electrostatic discharger is connected one gate line only.

The invention provides a switch control circuit, a chip, an adaptor and a switch control method. The switch control circuit is used for generating a power supply control signal and controlling a switch circuit to be connected in a delay way by detecting a first electrical signal reflecting power supply of a load and controlling the control switch circuit to be disconnected by detecting a second electrical signal reflecting an electrical signal in a power conversion circuit, and a part of electrical devices in the switch control circuit are maintained working according to the power supply control signal. By controlling the switch circuit to be connected in the delay way and starting power supply of a part of electrical devices in the switch control circuit within a delay period, light-loadpower supply can be timely and reliably achieved by employing a low-power consumption mode during a light-load period of the adaptor.

The invention provides a micro-fluid chip and a biology detection device and method, and relates to the field of biology detection. The micro-fluid chip comprises a first substrate, a second substrate, a first electrode, a second electrode, a first dielectric layer, a second dielectric layer, a first hydrophobic layer and a second hydrophobic layer, wherein the first substrate and the second substrate are opposite, the first electrode and the second electrode are opposite between the first substrate and the second substrate, the first electrode comprises multiple spaced first electrode units,the second electrode comprises multiple spaced second electrode units, each first electrode unit is opposite to the corresponding second electrode unit, the first dielectric layer and the second dielectric layer are located between the first electrode and the second electrode, the first hydrophobic layer and the second hydrophobic layer are located between the first dielectric layer and the seconddielectric layer, and a gap is formed between the first hydrophobic layer and the second hydrophobic layer. Compared with the prior art, driving voltage applied to the micro-fluid chip can be lower,and therefore, the risk that the chip is broken down can be reduced.

The invention provides a mechanical ball screw-type inerter device variable in inerter coefficient. The ball screw-type inerter device comprises an upper lifting lug, a lower lifting lug, a flywheel, a flywheel chamber, a variable lead screw, a screw nut and a screw stroke chamber; the flywheel is fixedly arranged at one end of the variable lead screw, and is located in the flywheel chamber; the screw nut is arranged at a part, extending out of the flywheel chamber, of the screw nut, and is fixedly connected with the upper end face of the screw stroke chamber; the other end of the variable lead screw extends into the screw stroke chamber; the upper lifting lug and the lower lifting lug are respectively hinged to the upper end of the flywheel chamber and the lower end of the screw stroke chamber. According to the ball screw-type inerter device provided by the invention, by adopting the variable lead screw, the inerter coefficient is changed by changing the lead of a ball screw; without installing an additional device or utilizing additional energy, and meanwhile, without a complicated and expensive controller, the inerter coefficient of the ball screw-type inerter device can be changed, and the temporary impact on a road surface is retarded, and the inerter device is prevented from being overloaded, so that the performance of a hanger bracket is effectively promoted further.

The invention discloses a composite sound-proof formed foaming automobile carpet and a preparation method thereof. The carpet is made of three layers of materials, namely a fabric layer, a middle multi-layer co-extrusion film layer and a bottom material layer, wherein the fabric layer is made of polyester fiber; the middle multi-layer co-extrusion film layer is made of PE/PE/AD/NYLON/AD/PE/PE multi-layer co-extrusion films; and the bottom material layer is made of polyester fiber. The sound-proof formed foaming automobile carpet provided by the invention has good sound insulation effect, can effectively prevent PU foaming breakdown, and has no toxic odor such as formaldehyde and the like and no penetrating odor; the fabric of the carpet has elegant color and the loop appearance can be adjusted; and the composite sound-proof formed foaming automobile carpet is an environment-friendly carpet with high sound insulation performance. The method for preparing the composite sound-proof formed foaming automobile carpet provided by the invention has simple process, high efficiency, strong operability, high qualification rate of finished products, and can be suitable for mass production.

The invention provides a cable and relates to the field of power cables. The cable comprises a wire, a high-temperature-resistant insulated layer, a shielding layer, and a protective layer. The high-temperature-resistant insulated layer, the shielding layer, and the protective layer are all hollow structures. The high-temperature-resistant insulated layer wraps the wire. The shielding layer wraps the high-temperature-resistant insulated layer. The protective layer wraps the shielding layer. The outer surface of the protective layer is equipped with a temperature-sensitive variable-color layer. The cable is not liable to soften and is good in signal shielding effect. The temperature of the outer surface of the wire can be conveniently known and the use safety of the cable is effectively guaranteed.