142results about How to "Improve drive characteristics" patented technology

The invention discloses a multi-degree-of-freedom intelligent pneumatic muscle based on shape memory alloy deforming net. A bending guide allay coil spring, a rotary steering allay coil spring and a deforming net formed by a shape memory allay mesh grid are sequentially, tightly and axially arranged outside an elastic rubber tube, both ends of which are sealed by an external catch hoop and an inner element. When the rubber inner tube is expanded by air pressure, on the basis of passive deformation of the deforming net, active deformation is added to restrain the deformation of pneumatic muscle, thereby realizing the characteristics of adjustability and multi-degree-of-freedom. Pulse current is adopted to heat the shape memory alloy intelligent material to have active deformation. The bending guide, rotary steering shape memory alloy springs are adopted to realize the bending and rotation of the pneumatic muscle. The positive effects of the invention lies in improving the drive characteristic of the pneumatic muscle, increasing the freedom degree of the pneumatic muscle and being applicable to the fields in need of high precision, flexibility and complex drive. The pneumatic muscle of the invention can directly connect load or connect load through a drive mechanism.

The present invention provides a driving circuit capable of exerting improved driving performance while saving power consumption. A capacitive load driving circuit includes a gate driver, which drives scan electrodes aligned in a column direction of capacitive load circuits arranged in a matrix, and a source driver, which drives data electrodes aligned in a row direction of the capacitive load circuits. The source driver includes a plurality of output circuits, which are aligned in the row direction, for driving the respective data electrodes. Each of the plurality of output circuits drives the corresponding data electrode after changing the pre-charge amount on the basis of the position of the scan electrode driven by the gate driver.

The invention relates to a front wheel and rear wheel drive steering control system of an automobile in the technical field of automobile engineering. Steering wheel steering angle sensors are respectively connected with a drive turning electronic control unit; one end of each steering wheel steering angle sensor is connected with a steering wheel, and the other end of each steering wheel steering angle sensor is connected with a front wheel steering motor servo control unit; the front wheel steering motor servo control unit is respectively connected with a front wheel steering angle displacement sensor and a front wheel steering execution mechanism; a rear wheel steering motor servo control unit is respectively connected with a rear wheel steering angle displacement sensor and a rear wheel steering execution mechanism; the front wheel steering execution mechanism is connected with a front wheel, and the rear wheel steering execution mechanism is connected with a rear wheel. The invention combines front wheel drive steering and rear wheel drive steering, improves the lateral dynamic performance of the automobile, the driving characteristics of a driver and the operating stability of the automobile, changes a steering angle of the front wheel and the rear wheel in real time according to the drive working condition and a running parameter of the automobile and ensures that the automobile response follows the output response of a reference automobile model.

A thin film transistor substrate includes; a substrate, an organic layer disposed on the substrate and including a trench formed by etching a predetermined region of an upper portion of the organic layer, a gate electrode disposed in the trench, an insulating layer disposed on the organic layer and the gate electrode, a semiconductor layer disposed on the insulating layer, a source electrode disposed on the semiconductor layer, and a drain electrode disposed on the semiconductor layer and spaced apart from the source electrode.

An organic electroluminescent compound and an organic electroluminescent device using the same. The organic electroluminescent compound having Formula 1 can be used as blue electroluminescent compound. The organic electroluminescent device using the organic electroluminescent compound having Formula 1 has improved luminous efficiency and color purity.

An optical device includes a lens holder that holds a lens and is movable in the optical-axis direction of the lens, and an actuator that moves the lens holder in the optical-axis direction. The actuator includes an actuator element composed of an electroactive polymer, an actuator-element holder that holds the actuator element, a mechanism that applies prestrain to the actuator element, and a connecting member that connects the lens holder and the actuator. Herein, a connecting portion of the connecting member is disposed adjacent to the side surface of the actuator.

A loudspeaker comprising a first magnet; a second magnet arranged to surround the first magnet; a yoke for connecting the first magnet and the second magnet; a first voice coil; a second voice coil; a first vibrating membrane of the voice coil; a second vibrating membrane disposed opposite to the first vibrating membrane with respect to the first magnet and connected to the second voice coil; a first vibrating membrane disposed between the first vibrating membrane and the first magnet a magnetic plate; and a second magnetic plate disposed between the second diaphragm and the second magnet, wherein the first voice coil is disposed in the first magnetic gap between the first magnetic plate and the yoke, and the second voice coil is disposed in the second magnetic gap between the second magnetic plate and the yoke.

A miniaturized transistor with reduced parasitic capacitance and highly stable electrical characteristics is provided. High performance and high reliability of a semiconductor device including the transistor is achieved. A first conductor is formed over a substrate, a first insulator is formed over the first conductor, a layer that retains fixed charges is formed over the first insulator, a second insulator is formed over the layer that retains fixed charges, and a transistor is formed over the second insulator. Threshold voltage Vth is controlled by appropriate adjustment of the thicknesses of the first insulator, the second insulator, and the layer that retains fixed charges.

A superior reflex type vertically-aligned liquid crystal display device wherein the refractive index anisotropy Deltan of its liquid crystal material is controlled to be more than 0.1, and the transmissivity of the liquid crystal is saturated with facility at a low voltage below 5 to 6V despite a reduction of the thickness of the vertically-aligned liquid crystal layer to less than 2 mum, hence achieving satisfactory driving at a practically low voltage while attaining another advantage of remarkable improvement in the transmissivity itself. Therefore, the display device indicates a sufficient transmissivity, an excellent low-voltage driving characteristic and a fast response. Further improvements are realizable in a display apparatus, a projection optical system and a projection display system by the use of such display device.

The invention relates to a method for improving the driving stability of a motor vehicle, wherein driver-independent braking interventions are triggered when a critical driving situation is expected on the basis of route information and current position data of the motor vehicle. The invention also relates to a corresponding system. According to the invention, the driver specifies information on the friction coefficient to be maximally used via a human-machine interface, said friction coefficient being used as the basis for the prediction of a critical driving situation.

Provided is a hydrodynamic bearing motor. The hydrodynamic bearing motor, wherein oil journal bearings are formed between a shaft and a sleeve, includes: an upper thrust cover that is fitted over a top portion of the shaft and has an annular rib; a fixture that is secured to a bottom portion of the shaft and has a receiving rib; an upper capillary seal that is defined between an outer circumference of the top portion of the sleeve and the annular rib and retains oil by capillary action; and a lower capillary seal that is defined between an outer circumference of the bottom portion of the sleeve and an inner circumference of the receiving rib and retains oil by capillary action. The hydrodynamic bearing motor provides improved operating characteristics by preventing leakage of oil despite expansion of air bubbles and balancing the pressure between bearings and has improved driving characteristics due to a sufficient journal bearing length.

A thin-film transistor, a method for manufacturing the same and a display device including the same are provided. The thin-film transistor may include a substrate, and an active layer formed on the substrate. The active layer may be made from an oxide semiconductor. A gate electrode may be formed above the active layer or below the active layer. A conductive layer may come in contact with the active layer, may be overlapped with at least a part of the gate electrode, and may be insulated from the gate electrode. A source electrode and a drain electrode may be electrically connected to the active layer. The conductive layer can reduce a channel length of the thin-film transistor and increase a capacitance between the source electrode and the gate electrode or between the drain electrode and the gate electrode.

A vehicle suspension assembly includes a control rod pivotally connected between a vehicle frame and an axle. The control rod controls longitudinal and vertical movement of the axle. A spring member is pivotally connected to the frame and fixed to the axle. Air spring assemblies are mounted between the axle and frame. The rigidly mounted spring member exerts torsion forces on the axle to counter roll forces and the air spring assemblies provide favorable ride characteristics adaptable to various trailer load conditions.

A display apparatus includes a display panel, a gate driver, and a data driver. The display panel includes a plurality of gate lines, a plurality of data lines, and a plurality of pixels connected to the gate lines and the data lines to display an image. The gate driver is configured to apply a gate signal to the gate lines and the data driver is configured to apply a data signal to the data lines. At least one intermediate voltage having a voltage level between a first voltage and a second voltage and a data voltage corresponding to a specific gray scale are sequentially applied to at least one pixel of the pixels as the data signal during a frame period.

A lens driving device including: a lens barrel having at least one lens therein; an actuator having a tip friction member provided at a leading end of a body thereof to be in contact with a friction member of the lens barrel, the actuator being flexed and bent upon application of power to provide a driving force necessary for driving the lens barrel in an optical axis direction; a preload member compressing the actuator against the lens barrel to keep the friction member and the tip friction member in contact with each other; and a guiding part guiding the lens barrel to move in the optical axis direction, wherein the friction member and the tip friction member are formed of a super-hard alloy.

A lens barrel includes a mount member configured to couple the lens barrel to a camera body, the mount member having a coupling surface for coupling with the camera body, a lens holding frame holding a lens and movable along an optical axis, the lens holding frame having a sleeve portion, the sleeve portion having a front end and a rear end, and a guide bar configured to guide the sleeve portion of the lens holding frame along the optical axis. The guide bar extends to a location nearer to an image plane than the coupling surface of the mount member. The rear end of the sleeve portion is disposed nearer to the image plane than the lens.

An optical device includes a lens holder that holds a lens and is movable in the optical-axis direction of the lens, and an actuator that moves the lens holder in the optical-axis direction. The actuator includes an actuator element composed of an electroactive polymer, an actuator-element holder that holds the actuator element, a mechanism that applies prestrain to the actuator element, and a connecting member that connects the lens holder and the actuator. Herein, a connecting portion of the connecting member is disposed adjacent to the side surface of the actuator.

The invention relates to a driving motor of an electric vehicle, in particular to a motor of an electric bicycle and an electric motor cycle which can realize automatic stepless speed change. The driving motor is characterized in that a permanent brushless speed-changing motor consists of a motor, a centrifugal rotating speed sensing magnetic adjusting mechanism and a speed reducer; one end of a motor shaft is connected with a flux shunt 2 which rotates with a rotor, and a spring is arranged between the flux shut 2 and the rotor; the other end of the motor shaft is connected with a thrust disc 10 which is a conical surface round disc; a plurality of wedge-shaped spaces distributed radially are formed between the inner surface of the round disc and a bracket 8; the middle part is placed with a centrifugal roller 9; and the motor shaft 1, the rotor bracket 8, the centrifugal roller 9 and the thrust disc 10 form a centrifugal mechanism. Compared with the prior art and mechanical shift-changing regulation, the driving motor adopts continuous stepless speed regulation, has higher efficiency than that of the mechanical CVT stepless regulation (the efficiency of 60 percent to 70 percent)by more than 20 percent, and is more suitable for the common hidden board type rotor compared with the electric control weak magnetism ratio. The basic method is as follows: a flux shut mechanism is added in the motor so as to achieve the purpose of increasing the speed by weak magnetism and realize ideal driving characteristic. Due to simple mechanism and reliable working, the driving motor has very wide application prospect.

The mixed power driven semi-towed truck is developed for eliminating the limitation of great power driver to heavy truck. It consists of towing truck and trailer, the towing truck is provided with driver and vehicular power generator set and the trailer is provided with driving motor connected to the vehicular power generator set. The semi-towed truck is dispersed driven, rather than concentrated driven, and thus has improved driving performance, raised driving efficiency, improved bearing capacity, towing capacity, climbing ability, accelerating performance, etc. The semi-towed truck has operating power determined based on the practical load and thus obvious fuel oil saving effect.

The invention relates to a Mn-Zn soft magnetic ferrite for saving energy and lighting, and preparation method of an obtained magnetic core. The soft magnetic ferrite comprises the following main components by molar part: 50.5-55.5 mol% of iron oxide Fe2O3, 34.5-38.3mol% of manganese oxide Mn3O4 and the balance of zinc oxide basically, and also comprises two groups of auxiliary materials A and B, wherein the auxiliary material group A comprises one or two of CaCO3 and SiO2 with the weight percentage of 50-500ppm, and the auxiliary material group B comprises one or more of Bi2O3, Nb2O5, V2O5 and Al2O3 with the weight percentage of 100-2000ppm. The magnetic core obtained from the material has high squareness ratio under the high and low temperature conditions, and simultaneously, the permeability temperature curve has negative temperature coefficient from minus 10 DEG C to 120 DEG C, and the driving characteristics are good under the situations of high and low temperature.

A double clutch powertrain for a vehicle makes smooth starting of the vehicle and smooth gear shifting possible despite using a dry type double clutch and makes regenerative braking and power generation possible when the vehicle decelerates, thus improving the driving characteristics of the vehicle, and enhancing the fuel efficiency of the vehicle.

The invention relates to a microstep subdivision driving control method and circuit of a fixed-frequency PWM full-bridge motor. The microstep subdivision driving control method comprises the steps offirstly, dividing natural step of a stepping motor used by a solar sailboard driving mechanism to microsteps; secondly, allowing a D / A conversion circuit of a control circuit to generate a stepping motor winding current reference sine and cosine signal and a microprocessor to generate a phase sequence signal, and sending the reference sine and cosine signal and the phase sequence signal to a driving circuit so that the two-phase winding of the stepping motor is approximate to step wave currents of a sine function and a cosine function and a low-speed rotation magnetic field is further generated in the motor; and finally, combining the reference sine and cosine signal and sawtooth wave of a fixed frequency, further modulating the current to a PWM control signal, and completing microstep subdivision driving control of the fixed-frequency PWM full-bridge motor.

The present invention relates to a method for controlling a suspension system of a motor vehicle comprising a vehicle body and a plurality of wheel pairs (2a / 2b, 2c / 2d), wherein the suspension system comprises spring members arranged for resilient connection between the wheels of the vehicle and said vehicle body. The method comprises the step of: monitoring at least one first parameter indicating braking of thee motor vehicle, and when said parameter indicates braking of the motor vehicle, preventing compression of the spring members of at least one wheel pair (2a / 2b, 2c / 2d) of the motor vehicle for counteracting a rotation of the vehicle body in connection to braking.

An optical element driving device includes an optical element holder, first and second magnets, first and second magnetic bodies each having a cross section including a vertex and first and second legs forming an opening therebetween, first and second piezoelectric elements that move the optical element holder in directions perpendicular to each other by slidingly moving the first and second magnetic bodies by vibrating the first and second magnets, and first and second magnetic sensors that detect a position of the optical element holder, wherein the first and second piezoelectric elements are driven in a state in which the first and second magnets are coupled to the first and second legs from the opening side, wherein the first and second magnets are each magnetized in directions perpendicular to a magnetization line, and wherein the second magnetic sensor is disposed at a position that is not on the magnetization line.

A superior reflex type vertically-aligned liquid crystal display device wherein the refractive index anisotropy Δn of its liquid crystal material is controlled to be more than 0.1, and the transmissivity of the liquid crystal is saturated with facility at a low voltage below 5 to 6V despite a reduction of the thickness of the vertically-aligned liquid crystal layer to less than 2 μm, hence achieving satisfactory driving at a practically low voltage while attaining another advantage of remarkable improvement in the transmissivity itself. Therefore, the display device indicates a sufficient transmissivity, an excellent low-voltage driving characteristic and a fast response. Further improvements are realizable in a display apparatus, a projection optical system and a projection display system by the use of such display device.

The invention relates to a method for actuating an automotive braking system which is provided with a brake booster (1). The method involves detecting the drive torque and / or setting position of a driving mechanism (2) of the brake booster (1) and generated pressure in a brake circuit of the brake system. The leakage in the brake loop is detected based on the stored values in a database. Inlet valves (8) of specific wheel brakes (10) are opened and the inlet valves (8) of other wheel brakes (10) are closed successively, so that the leakage is determined to exist in at least one wheel brake (10). The wheel brake ((10) is switched off during subsequent operation, particularly driving of the motor car.

The invention provides a voltage converting unit including a converting module part, a temperature compensating part, a first gate driving signal generating part and a second gate driving signal generating part, whereby an image display quality is improved. The converting module part generates a gate driving pulse based on an externally provided voltage. The temperature compensating part generates a reference voltage based on a primary reference voltage with respect to a temperature. The first gate driving signal generating part generates a first gate driving signal based on the gate driving pulse and the reference voltage. The second gate driving signal generating part generates a second gate driving signal based on the gate driving pulse and a ground voltage.