90results about How to "Simple driving circuit" patented technology

The invention relates to a ring-type multi-degree-of-freedom ultrasonic motor and an electric excitation method, pertaining to the field of ultrasonic motors. The ultrasonic motor comprises a rotor and a stator. The invention is characterized in that the rotor is a spherical rotor (1); the stator is a metal ring (2), and six piezo-electric ceramic pieces (3) are affixed on the flank of the ring stator; three upper bosses (4) are evenly distributed on the periphery of the upper end-face of the ring stator and arranged at the same position of the platform (6) affixed with ceramic pieces to support and drive the spherical stator; the rotor provides the prepress force required by the stator and the rotor; three small bosses (4) corresponding to the positions of the upper bosses (4) are also arranged on the lower end-face of the ring stator to support the whole motor. When the driving signal provides power supply to any two piezo-electric ceramic pieces (3) opposite to each other, the two flexural vibration modes in the face of the stator can be excited out to produce standing waves and drive the spherical rotor to round the spherical center of the rotor and rotate around the axial line parallel with the two piezo-electric ceramic pieces. The ultrasonic motor can realize the rotation of a plurality of rotating shafts; the invention has the advantages of a simple structure, a small size, high efficiency, reliable operation, etc.

The ultrasonic motor is composed of stator module, spherical rotor, and bracket module. The stator module consists of a pair of up and low stator ring, and a pair of unidirectional piezoelectric ceramic ring polarized in axial direction ceramic. Fan shaped electrodes are plated on surface of piezoelectric ceramic along circumferential even zones. The rotor is held in middle of two stator rings. Effect of pressure bolts and elastic support boards provides pre-stressing between stator and rotor. Through different fan shaped electrodes, drive signals are supplied to ceramic rings to make stator rings generate traveling wave to drive spherical rotor so as to realize bidirectional rotation around axial line of stator ring; or generate standing wave at different positions to drive spherical rotor so as to realize bidirectional rotation around axial line of passing through center of rotor and perpendicular to axis of stator rings. Features are: large moment and reliable operation.

The present invention relates to an enhancement normally off nitride semiconductor device and a method of manufacturing the same. The method includes the steps of: forming a buffer layer on a substrate; forming a first nitride semiconductor layer on the buffer layer; forming a second nitride semiconductor layer on the first nitride semiconductor layer; etching a gate region above the second nitride semiconductor layer up to a predetermined depth of the first nitride semiconductor layer; forming an insulating film on the etched region and the second nitride semiconductor layer; patterning a source/drain region, etching the insulating film in the source/drain region, and forming electrodes in the source/drain region; and forming a gate electrode on the insulating film in the gate region. In this manner, the present invention provides a method of easily implementing a normally off enhancement semiconductor device by originally blocking 2DEG which is generated under a gate region. In addition, the present invention provides an enhancement normally off power semiconductor device with a simple and efficient driving circuit in a HEMT device.

The invention provides a single-tube IGBT (Insulated Gate Bipolar Translator)-based three-stage brushless generator power control device and a power control method. The single-tube IGBT-based three-stage brushless generator power control device comprises a minimum system, a control circuit, a power unit, a power module, an auxiliary exciter, a main exciter, a generator, a first voltage measurement transformer, a second voltage measurement transformer, a third voltage measurement transformer, a first current transformer, a second current transformer, a Hall voltage sensor, a Hall current sensor, a given voltage circuit, an excitation relay, a deexcitation relay, an IGBT drive circuit, an analog input circuit, a phase-locked loop frequency doubling circuit, a discrete input photoelectric isolation module and a discrete output photoelectric isolation module. Because the single-tube IGBT is adopted as a power switching device, switching loss can be effectively reduced, the response speed can be effectively increased, and the reliability is high; a controller is adopted as a main control unit to accurately control the three-stage synchronous generator; because the single-tube IGBT-based three-stage brushless generator power control device can communicates with an upper computer to monitor the system, faults can be rapidly and conveniently diagnosed and overhauled.

In order, to manufacture a high-performance infrared-emitting element having high-speed thermal response characteristics and a high infrared emissivity, a bridge (heat-generating) portion having a separation space is formed on a silicon element substrate. The bridge portion is formed to have a thickness of 5 mum or less by doping boron as an impurity by ion implantation with a concentration distribution peak value of 1.5x1019 atoms/cm3 or more, and performing annealing under predetermined conditions for activating the impurity layer. In the infrared-emitting element manufactured in this manner, even if the bridge portion is made thin to improve the thermal response characteristics, the infrared emissivity does not decrease because of a high impurity concentration, and a large temperature modulation width can be obtained. In doping boron as the impurity by ion implantation, the dose is preferably set to 3.0x1014 ions/cm2 or more. To activate the impurity layer upon doping boron, the annealing is performed in the nitrogen gas atmosphere at a temperature of 1,100° C. to 1,200° C. for 5 min to 40 min and further in the wet oxygen atmosphere for about 25 min to 40 min. As a result, the doping concentration of boron by ion implantation and the activation of the impurity layer can be stably increased and enhanced.

The invention belongs to the field of mechanical equipment state monitoring, and particularly relates to a large-caliber lubricating oil path online metal particle monitoring device and detection method. The device comprises a sensor; the sensor comprises a first magnetic pole, a large-caliber oil pipe outer side plane groove, a detection coil, a second magnetic pole and an excitation coil; oil liquid is guided to pass through a large-caliber oil pipe along a lubricating oil path system of mechanical equipment; the two magnetic poles of the sensor are attached to the outer side of the large-caliber oil pipe; the excitation coil on the sensor is connected with a direct-current power supply; the detection coil is arranged on the outer surface of the large-caliber oil pipe; and the detectioncoil is connected with a voltage signal acquisition device. A direct current is used for driving the sensor to generate an axial high-gradient static magnetic field as an excitation source, and the sensor is good in anti-interference capability; and compared with a traditional inductance sensor which adopts high-frequency excitation, a driving circuit is simple, and the tiny parameter change of the excitation coil does not cause the considerable change of a sensor output, so that the manufacturing precision requirement on the sensor is not high.

Disclosed is a Liquid Crystal Display (LCD) device including a black/white LCD panel for displaying an image, a color filter disposed on a rear surface of the black/white LCD panel in order to filter input light into light of preset colors and output the filtered light to the black/white LCD panel, and a back light unit having a plurality of optical sheets to output white light to the color filter. The color filter is integrated with one of the plurality of optical sheets as one piece.

The invention discloses a semiconductor quantum dot-infrared detection-visible light display integrated system, a preparation method and an imaging method. The system sequentially comprises a transparent substrate, a transparent electrode, a hole transport layer, a quantum dot light-emitting layer, an electron transport layer, a mesh electrode, an insulating dielectric layer, a P-type doped layer,a quantum dot infrared photoelectric conversion layer, an N-type doped layer, a rear collecting electrode, an infrared detection structure power supply and a visible light-emitting structure power supply from bottom to top, wherein the transparent electrode is connected with a positive pole of the visible light-emitting structure power supply; the mesh electrode is connected with negative poles of the visible light-emitting structure power supply and the infrared detection structure power supply; and the rear collecting electrode is connected with the positive pole of the infrared detection structure power supply. A detection structure is integrated with a display structure, so that direct coupling of display pixels through a detection unit is achieved and an incident infrared image is directly converted into a visible light image; and the electrodes do not need to be pixelated during preparation, so that the preparation process is greatly simplified and the preparation cost is reduced.

The invention provides a light emitting diode (LED) light source component and an LED lamp provided with the same. The light emitting diode (LED) light source component comprises a heat dissipating substrate, a blue and white LED mixed light source, a light transmitting carrier and remote excitation materials, wherein the blue and white LED mixed light source is arranged on the upper surface of the heat dissipating substrate; the light transmitting carrier is positioned above the blue and white LED mixed light source; and the remote excitation materials are arranged on the light transmitting carrier. The LED light source component provided by the invention controls the light emitting power through the blue and white LED mixed light source, and is further matched with the remote excitation materials to manufacture the high-color-rendering white LEDs at different color temperatures, so that a high-color-rendering white LED light source of which the color temperature is in the range of 2500K to 6000K can be obtained.

The invention discloses a digital negative ion generator, which comprises a power conversion circuit, a main controller, a voltage conversion circuit, a protection circuit and a negative high voltage feedback circuit, wherein the power conversion circuit is composed of an LC half-bridge resonant circuit, a piezoelectric ceramic transformer and a double voltage circuit connected in sequence; the protection circuit comprises an overcurrent protection circuit and an overheat protection circuit; the negative high voltage feedback circuit is composed of a bleeder circuit, a half wave rectification circuit and a voltage amplitude limiting circuit connected in sequence; the input end of the main controller is also connected with an A/D conversion circuit; the input end of the A/D conversion circuit is also connected with a specified voltage circuit; the output end of the main controller is connected with a driving circuit; and the LC half-bridge resonant circuit is connected with the output end of the driving circuit. The invention also discloses a digital negative ion generator control method. The design is novel and reasonable, work reliability is high, functions are complete, the fault rate is low, maintainability is high, practicability is high, and promotion and use are facilitated.

The invention provides a light emitting diode lamp tube and a liquid crystal display device, wherein the light emitting diode lamp tube comprises a plurality of primary light emitting units which are mutually connected in series; each primary light emitting unit comprises a plurality of secondary light emitting units which are connected in parallel; and each secondary light emitting unit is provided with at least one light emitting diode. The liquid crystal display device provided by the invention comprises the light emitting diode lamp tube, thus the liquid crystal display device of such structure is good for ensuring the uniform brightness of a liquid crystal display screen, the problem that severe nonuniform brightness of the liquid crystal display screen when certain light emitting diode is damaged is overcome, and the liquid crystal display device provided by the invention has the advantages that the driving circuit of the liquid crystal display device can be simplified, and the design cost is lowered.

The present invention provides an adjustment method and an adjustment apparatus of the ICP ion source flame detection position. The adjustment method comprises: determining a detection region, determining an X-direction detection interval and a Y-direction detection interval according to the set voltage critical value, acquiring all detection points corresponding to the maximum X-direction detection voltage value, determining the optimal X-direction detection point through a dichotomie method, and determining the optimal Y-direction detection point by using the dichotomie method. According to the adjustment apparatus, the movements in the X direction and the Y direction are achieved through the stepping motor and the ball screw pair, the non-connecting ends of the stepping motor and the ball screw pair are respectively fixed on the sliding block of the guide rail sliding block pair and the rolling wheel, the X-direction ball screw pair and the Y-direction ball screw pair respectively form a threaded connection with the base, the photoelectric conversion module on the base receives the light of the filter to complete the photoelectric conversion, and the electrical signal is processed by the controller so as to control the stepping motor. According to the present invention, with the adjustment method and the adjustment apparatus, the adjustment of the optimal detection position can be rapidly achieved, and the characteristics of quick adjustment, accurate positioning and stable operation are provided.

An accumulation layer controlled thyristor, which belongs to the technical field of semiconductor power devices, is characterized in that the on/off of the thyristor can be controlled by stopping electron circulation through an electron barrier of an internal electric field formed in a P bypass region and an N depletion region. When a positive voltage is applied on a gate, an accumulation layer is formed at the interface between the N depletion region (33) and a gate oxide layer (6); an electron inversion channel is formed in a P-type base region (8); and electrons pass through an N active region (9), the accumulation layer, an N layer (200), and the electron inversion channel to the an N base region (3), thereby controlling the normal operation of the device. The accumulation layer controlled thyristor as the substitute of the conventional gate controlled thyristors, such as MOS controlled thyristors, has the advantages of lower conduction voltage drop, larger saturation current density, no parasitic effect, and greatly improved safety operation area, and can overcome the disadvantages of the conventional gate-controlled thyristors, such as the deficiency of current saturation characteristic and poor turn-off capability.

The invention discloses a field programmable gate array (FPGA)-based multi-channel phase-shift controller, which comprises a register storage module, a judgment and recognition module and a phase-shift control module, which are serially connected with one another, wherein the register storage module is used for storing data transmitted by a personal computer (PC); the PC communicates with an FPGA chip; the transmitted data are stored in a random-access memory (RAM) of an FPGA chip; the judgment and recognition module is used for receiving the data from the register storage module, judging the type of control words through recognizing high eight bits of the data, and then conveying the control words to different registers; and the phase-shift control module generates the required pulse-width modulation (PWM) waveform according to different types of control words in various registers, so as to meet the drive and control requirements of an ultrasonic motor. The multi-channel phase-shift controller disclosed by the invention is high in frequency modulation accuracy, high in phase modulation accuracy and large in adjustment range, and simultaneously has soft starting and over-voltage protection functions; and a guarantee can be provided for drive and control of the ultrasonic motor.

The invention provides an asymmetric input multi-level converter device, which comprises a switched capacitor unit X and a full bridge unit Y, wherein the switched capacitor unit X comprises a first DC input voltage source Vin1, a second DC input voltage source Vin2, a first electrolytic capacitor C1, a first diode D1, a second diode D2, a third diode D3, a first switch tube S1, a second switch tube S2, a third switch tube S3, and a fourth switch tube S4; and the full bridge unit Y includes a fifth switch tube S5, a sixth switch tube S6, a seventh switch tube S7, and an eighth switch tube S8.The invention also provides a control method for the converter device. More-level output with fewer devices can be realized, the driving circuit required by the converter device is simplified, the making cost of the converter device is reduced, the converter device provided in the invention has multiple input ports, and the application in a multi-input source situation is more flexible.

The invention discloses a thin-plate-type rotating ultrasonic motor which belongs to the field of ultrasonic motors. The motor comprises a rotor, a base, a bearing, a rubber spring and a stator. The rotor and the base are positioned through the bearing; the rubber spring is pressed between the stator and the base for fixing the stator and providing a pre-pressure between the stator and the rotor at the same time; the stator adopts a composite structure of an annular metal thin sheet and an annular piezoelectric ceramic plate; and the piezoelectric ceramic plate is one-way polarized and is provided with fan-shaped silvered electrodes which are uniformly sectioned. Compared to traditional wave-type ultrasonic motors, the thin-plate-type rotating ultrasonic motor is simple in structure, low in manufacturing cost, easy to miniaturize, and applicable to precision mechanical devices and optical apparatuses.

The invention provides an ultrasonic wave power source for driving a magnetostrictive transducer. The ultrasonic wave power source comprises a rectifying filtering circuit, a power inversion circuit, a low pressure control triggering circuit for outputting a control signal of a power switching tube in the power inversion circuit and a matching and load regulation circuit, wherein the matching and load regulation circuit comprises a high frequency output transformer T, and the primary side of the high frequency output transformer T is connected with the power inversion circuit. The improvement of the ultrasonic wave power source provided by the invention is as follows: the matching and load regulation circuit also comprises a diode D and a resistor R5, and the diode D and the resistor R5 are connected in parallel so as to be connected in series with the magnetostrictive transducer in an auxiliary side loop of the high frequency output transformer T; the ultrasonic wave power source provided by the invention can be used for realizing the purpose that an electric current flowing the magnetostrictive transducer is a plus-minus semi-revolution dissymmetry alternate current, a direct-current channel is not needed to be additionally increased, and the transducer can normally operate in a bias magnetic state; and the driving circuit of the magnetostrictive transducer is simplified.

The invention relates to an apparatus for automatically hollowing out label paper. The apparatus for automatically hollowing out the label paper is characterized in that the apparatus comprises a transmission apparatus (40), a power apparatus (30), a mold core (50), and a frame (60). The mold core (50) is vertically arranged inside the frame body (60), the power apparatus (30) is horizontally arranged on the upper part of the frame body (60), the transmission apparatus (40) is arranged between the power apparatus (30) and the mold core (50), and the power apparatus (30) and the transmission apparatus (40) drive the mold core (50) to vertically move downwards to punch the label paper so that the label paper can be hollowed out. According to the apparatus for automatically hollowing out thelabel paper, the structure is novel, using is convenient, performance is stable, the apparatus is suitable for connection of any small-type intelligent devices, printing labels are automatically punched, and thus the apparatus has broad market prospects.

The invention discloses a transverse GaN-based enhanced junction field effect transistor device and a preparation method thereof. According to the device, a multi-chip vertical strip-shaped structurep-GaN is obtained on an n-GaN substrate through adoption of grooving and epitaxial regrowth or ion implantation, a plurality of thin p-n junction transverse n-type channels are formed with the n-GaN substrate, and the n-type channel is enabled to be in a complete depletion state of a p-n junction built-in electric field under zero bias through control of the thickness of the channel and the p-typeand n-type doping concentrations, namely, the device is in an off state, and the channel can be enabled to be in an on state only by applying a forward bias voltage, namely, the device has a positivethreshold voltage. Large-current output of the device is ensured by multiple channels.

The invention discloses a method for verifying the range finding capability of a laser range finder. The method comprises the following steps that: a first laser pulse is transmitted by a transmitting end in the laser range finder, and the first laser pulse is received by a receiving system after the first laser pulse is reflected multiple times; after receiving the first laser pulse signal, a receiving system controls a long-distance test transmitting system or a short-distance test transmitting system to transmit a laser pulse with a power being a set value after a set time delay, and the laser pulse is received by a receiving end in the laser range finder after being reflected multiple times; and the laser range finder can feed back a measured value, and the range finding capability of the laser range finder can be obtained according to the existence and size of the measured value. According to the invention, sites required by testing are greatly reduced, soverification of the distance measuring capability of the laser range finder can be carried out indoors and is not influenced by outdoor aiming precision, sites, weather, atmospheric visibility and the like, and production efficiency is further improved.

The present invention relates to a multi-panel display device and method of driving the same that is adaptive of having a multi-panel and simplifying a driving circuit thereof. A multi-panel display device according to the present invention includes: a plurality of display panels to which data lines are commonly connected; and a data driver which timely divides data to supply it to the data lines.