76results about How to "Reduce the voltage amplitude" patented technology

It is an object of the present invention to provide a display apparatus which can be miniaturized and is operated stably even at high resolution.

The display apparatus according to the present invention includes a pixel array unit, a signal line driving circuit, and a scanning line driving circuit, each of which is formed by using a polysilicon TFT on a glass substrate, a control circuit, and a graphic controller IC. Since the graphic controller IC rearranges digital pixel data DATA in the inside, it is unnecessary to provide a gate array. Since the cycle of a clock signal CLK is twice as much as that of the digital pixel data DATA, the clock signal CLK having a frequency at which the polysilicon TFT normally operates can be supplied to the signal line driving circuit. Further, since the edge of the clock signal CLK is deviated from the changing position of the digital pixel data DATA and they are outputted, the signal line driving circuit can effectively capture the digital pixel data DATA.

A driving circuit of an electrooptic device includes: a plurality of scanning lines; a plurality of data lines; first and second capacitor lines; a common electrode; pixels; a scanning-line driving circuit; a capacitor-line driving circuit; and a data-line driving circuit. The pixels each include: a pixel switching element; a pixel capacitor disposed between the pixel switching element and the common electrode; and a storage capacitor. When the one scanning line is selected, the capacitor-line driving circuit shifts the voltage of a first (or second) capacitor line corresponding to one scanning line to one of higher and lower levels from a predetermined voltage by a predetermined value, and holds the predetermined voltage after a scanning line apart from the one scanning line by a predetermined number of lines is selected until the one scanning line is selected again.

The invention discloses an intelligent electric phase separation device of an alternating current electrified railway. The intelligent electric phase separation device is composed of a first switch, an impedor connected with the first switch in parallel, a second switch, an impedor connected with the second switch in parallel, a sensor for detecting the current and voltage of the first switch, a sensor for detecting the current and voltage of the second switch and the like, wherein the first switch is connected with a first electric supply arm and a phase separation area, and the second switch is connected with a second electric supply arm and the phase separation area. According to the device, the train pantograph position can be automatically recognized through the voltage information at the two ends of the first and second switches and the current information flowing through the first and second switches, and the first and second switches are automatically turned on or off according to the recognized pantograph position, so that the phase separation area obtains or cuts off electric energy of the electric supply arms. The circuit structures of the switches and the impedors connected with the switches parallel can be replaced with the circuit structures of linked switches at the two ends of a step-down transformer and a low-voltage winding thereof. According to the device, no train position detection mechanism needs to be installed on a track, the structure is simple, and use and maintenance are convenient.

The invention provides a fault monitoring method for a secondary circuit of a metering current transformer. The method includes the steps that 1, a high-frequency voltage signal Uh is injected into the secondary circuit of the monitored metering current transformer; 2, a current signal I2 in the secondary circuit is measured and divided into a power frequency current signal Ip and a high frequency current signal Ih; 3, AD conversion is carried out on the Ip and the Ih; 4, the ratio I gamma of the positive amplitude value and the negative amplitude value of the Ip within a power frequency current period is calculated; 5, the admittance Yh of the secondary circuit is calculated and is equal to Ih/Uh; 6, the electric energy value Ec is calculated according to the Ip and the power factor cos phi and the power frequency voltage Up of an electric energy meter of the secondary circuit of the monitored current transformer; 7, the difference value delta E within the time interval T is calculated and is equal to the difference between the Ec and Em; 8, the fault type of the secondary circuit of the monitored current transformer is judged according to the ratio I gamma, the difference value delta E and the admittance value Yh. The method is simple and reliable, faults of the secondary circuit of the monitored current transformer are monitored in real time and online, and the fault position and fault type of the circuit are judged and recognized.

The invention provides a low-temperature plasma no-heat ignition flame stabilization device which adopts the low-temperature plasma to cause the flammable mixed gas to produce a plurality of free radicals and active components such as electrons and hydroniums, etc. to implement large-volume igniting flammable mixed gas, belonging to aeronautics and astronautics power thrust system field. The invention consists of a high pressure powers supply 1, a high pressure electrode 2, an air inlet hole 3, an air inlet seat 4, a retaining medium 5, a low voltage electrode 6, a rectifier 7 and a combustion chamber 8; the high voltage electrode 2 is hermetically connected with the air inlet seat 4 and is connected with a high voltage electrode 1; the air inlet hole 3 is provided with openings on the air inlet seat 4; the interior of the air inlet seat 4 is hermetically connected with the retaining medium 5; the external wall of the rectifier 7 is tightly close to the internal wall of the retaining medium 5; the upstream is the high voltage electrode 1 and the downstream is the combustion room 8 which is hermetically connected with the retaining medium 5. The invention can implement large-volume ignition, reduces the voltage amplitude to large extent, has simple structure and reliable system, and is an ignition device with extremely developmental prospect used by the aeronautics and astronautics and industrial combustion systems.

The invention discloses a liquid crystal display device capable of switching a visual angle. The liquid crystal display device comprises a display panel, wherein the display panel comprises a first substrate, a second substrate opposite to the first substrate, and a liquid crystal layer located between the first substrate and the second substrate; a visual angle control electrode and suspending electrodes are arranged on the first substrate in a mutual insulation manner; a public electrode and pixel electrodes are arranged on the second substrate in the mutual insulation manner; the pixel electrodes are arranged in each subpixel and comprise a plurality of spaced pixel electrode bars; the suspending electrodes are arranged in each subpixel and comprise a plurality of spaced suspending electrode bars; all the suspending electrodes and all the pixel electrodes are arranged in an up-and-down correspondence manner; the suspending electrodes are in suspending state; the visual angle control electrode is used for applying a voltage signal for controlling visual angle switching.

A high-speed low-power-consumption multi-threshold-value asynchronous resizing reset retaining D-type trigger comprises a low-power-consumption control circuit for receiving a low-power-consumption control input signal slp, conducting buffer processing on the low-power-consumption control input signal slp and then outputting signals, a resizing control circuit for receiving an asynchronous resizing input signal set, conducting buffer processing on the asynchronous resizing input signal set and then outputting the signals respectively, a selection control circuit for receiving selection data entering keeping signal sel, conducting buffer processing on the selection data entering keeping signal sel and then outputting signals respectively, a master latch for receiving a data input signal d, a normal phase input clock signal clk, a reverse phase input clock signal nclk, an asynchronous reset input signal r, the selection data entering keeping signal sel and signals sleep and nsleep, s and ns, latching the data input signal d and then outputting a signal qt, and a slave latch for conducting latching on the signal qt and then outputs the signals respectively. The high-speed low-power-consumption multi-threshold-value asynchronous resizing reset retaining D-type trigger has the advantages of being simple in structure, capable of improving transmission efficiency, reducing static leakage current and power consumption and the like.

The invention discloses a method for optimizing light load efficiency of an inverter based on an inductive current critical continuous control strategy and belongs to the technical field of power electronic converters. Soft switching-on of an inverter switching element is realized through the inductive current critical continuous control strategy; and a switching frequency of an inverter is directly related to output power and input voltage. Under the condition of a constant input voltage, the switching frequency of the inverter increases with reduction of a load, the switching-off loss is increased, and the light load efficiency of the inverter is reduced. In order to improve the light load conversion efficiency, the switching frequency is reduced and the switching loss is decreased through a method of reducing the input voltage under the condition of a light load, and thus the light load conversion efficiency is improved.

An EL light-emitting element is driven digitally to reduce power consumption using a pixel having three transistors and two capacitors. A reset transistor for diode connection writes the threshold voltage of the drive transistor onto a coupling capacitor. The data voltage plus threshold voltage is then written onto the gate of the drive transistor. This reduces the amplitude of the data voltage required, further reducing power consumption.

An ultrasonic motor driving method, which drives the piezoelectric elements into two-two or three-three groups; within two-two group, one of the output terminals of the first and second piezoelectric elements are connected to the first and third nodes respectively, and the other terminals of the first and second piezoelectric elements are both connected to the second node which is the common ground terminal, the adjacent piezoelectric elements in one two-two group are polarized in sequence of “++−−”. Within three-three group, one of the output terminals of the first to third piezoelectric elements are connected to the first to third nodes respectively, and the other terminals of the first to third piezoelectric elements are all connected to the fourth node which is the common ground terminal, all piezoelectric elements are polarized in forward direction. Alternating voltage of two-phase in orthogonal or three-phase in symmetry is obtained by controlling the three-phase bridge inverting circuit to power each piezoelectric element. Therefore the voltage amplitude of the power supply and the number of transistors could be decreased effectively, and as a result the efficiency of driving circuit could be improved.

One embodiment of the present invention discloses a display device which can use a display element having a relatively large difference between a minimum gradation voltage and a maximum gradation voltage. A first selection period and a second selection period are included in a period (a scanning signal line selection period) in which each gate wiring is selected. In the first selection period, a first selection voltage for allowing every TFT included in a line, which is an object to be selected, to be in an ON state is applied to the gate wiring of the line which is the object to be selected. In a period between the first selection period and the second selection period, a non selection voltage is applied to the gate wiring which is the object to be selected and the voltage of an auxiliary capacity wiring corresponding to the gate wiring which is the object to be selected is changed. In the second selection period, a second selection voltage for allowing a part of the TFTs included in the line, which is the object to be selected, to be in an ON state is applied to the gate wiring which is the object to be selected.

The invention discloses a fractional order non-linear chaotic system circuit having an absolute value item. The fractional order non-linear chaotic system circuit comprises a first channel circuit, a second channel circuit and a third channel circuit, wherein the first channel circuit has two input ends and one output end, the second channel circuit has three input ends and two output ends, the third channel circuit has one input end and one output end, the input ends and the output ends of the three channel circuits are mutually connected to form the fractional order non-linear chaotic system circuit, the output end x of the first channel circuit is taken as an input end x of the second channel circuit, the output end y of the second channel circuit is taken as an input end y of the first channel circuit and an input end y of the third channel circuit, the output end y' of the second channel circuit is taken as an input end y' of the second channel circuit, and the output end z' of the third channel circuit is taken as an input end z' of the first channel circuit and an input end z' of the second channel circuit. The fractional order non-linear chaotic system circuit is advantaged in that a non-continuous chaotic system is convenient to construct, a chaotic state is stable, the circuit is easy for realization, and the fractional order non-linear chaotic system circuit has relatively good application prospects in the engineering field.

The present invention relates to a method, of providing adaptive impedance in a Power Amplifier (PA), by providing more than one transistors in which one transistor is used to change the load line or to linearize the input signal by adapting the biasing of each transistor, wherein the transistors are connected in parallel.

A high-speed low-power-consumption multi-threshold-value asynchronous resizing reset D-type trigger comprises a low-power-consumption control circuit for receiving a low-power-consumption control input signal slp, conducting buffer processing on the low-power-consumption control input signal slp and then outputting signals, a resizing control circuit for receiving an asynchronous resizing input signal set, conducting buffer processing on the asynchronous resizing input signal set and then outputting the signals respectively, a master latch for receiving a data input signal d, a normal phase input clock signal clk, a reverse phase input clock signal nclk and signals sleep and nsleep, and a slave latch for receiving the normal phase input clock signal clk, the reverse phase input clock signal nclk, an asynchronous reset input signal r and signals qt, s sleep and nsleep, wherein the master latch conducts latching on the data input signal d and then outputs the signal qt, and the slave latch conducts latching on the signal qt and then outputs a first output signal q and a second output signal nq respectively. The high-speed low-power-consumption multi-threshold-value asynchronous resizing reset D-type trigger has the advantages of being simple in structure, capable of improving transmission efficiency, reducing static leakage current and power consumption and the like.

The invention discloses a micro-mirror graph scanning mechanism, which comprises a laser light source, spectroscopes, a micro-mirror device and a screen and is characterized by further comprising a position sensitive detector. The spectroscopes are divided into two groups and are respectively a first spectroscope and a second spectroscope. The second spectroscope is used for dividing laser emitting by the first spectroscope into two beams and respectively emits the beams to the screen and the position sensitive detector. The position sensitive detector and the second spectroscope form feedbacks, the deformation of a graph is rectified according to scanned graphs displayed on the position sensitive detector and the screen, and the properties of the micro-mirror are tested. The micro-mirror graph scanning mechanism integrates the test of the properties and the scanning of the graphs into a whole so as to facilitate understanding of the properties and relative application of the micro-mirror device. The deformation of the graphs can be rectified by utilizing the position sensitive detector (PSD) and the spectroscope to form the feedbacks for loop control, and an optical path is simple.

The present invention relates to compound semiconductor ESD protection devices of three types. The device comprises a multi-gate enhancement mode FET (E-FET). For the type I compound semiconductor ESD protection device, the source electrode is connected to the plural gate electrodes through at least one first resistor, and the drain electrode is connected to the plural gate electrodes through at least one second resistor. For the type II compound semiconductor ESD protection device, the plural gate electrodes are connected to at least one of the inter-gate regions between two adjacent gate electrodes through at least one fourth resistor. For the type III compound semiconductor ESD protection device, the plural gate electrodes are connected to the source or drain electrodes through at least one seventh resistor. Any two gate electrodes in the three types of compound semiconductor ESD protection devices can be connected by a resistor.

The invention discloses a high-speed low-power-consumption multi-threshold double-edge-trigger D-type flip-flop. The high-speed low-power-consumption multi-threshold double-edge-trigger D-type flip-flop comprises a low-power-consumption control circuit, a positive-edge trigger latch, a negative-edge trigger latch and a low-power-consumption output control circuit, wherein the low-power-consumption control circuit is used for receiving low-power-consumption control input signals slp and outputting signals sleep and nsleep respectively after buffering the low-power-consumption control input signals slp; the positive-edge trigger latch is used for receiving data signals d, normal-phase clock input signals clk, inverse-phase clock input signals nclk and the signals sleep and nsleep; the positive-edge trigger latch outputs signals qtp after latching the data signals d; the negative-edge trigger latch is used for receiving the data signals d, the normal-phase clock input signals clk, the inverse-phase clock input signals nclk and the signals sleep and nsleep and outputs giansl qtn after latching the data signals d; the low-power-consumption output control circuit is used for selecting values outputted by the positive-edge trigger latch or the negative-edge trigger latch. The high-speed low-power-consumption multi-threshold double-edge-trigger D-type flip-flop has the advantages of simple structure, transmission efficiency can be improved, static leakage current and power consumption can be reduced and the like.

The invention provides a cantilever beam piezoelectric microspray mechanism capable of spraying high-viscosity fluid. The mechanism comprises a base, a porous liquid storage structure, a flexible thinfilm, a copper sheet, piezoelectric ceramic, an upper cover plate, a copper sheet pressing plate and spray nozzles. A liquid storage tank is formed in the left side of the upper surface of the base,a mounting groove is formed in the right side of the upper surface of the base, a fluid circulating groove is formed in the bottom of the mounting groove, the liquid storage tank communicates with thefluid circulating groove through a liquid storage tank outlet and a fluid flow channel inlet in sequence, the porous liquid storage structure is arranged in the liquid storage tank, the flexible thinfilm is arranged in the positioning groove and completely covers the fluid circulating groove, the upper cover plate constrains the normal outward freedom degree of the flexible thin film, the coppersheet is attached to the flexible thin film, the piezoelectric ceramic is attached to the copper sheet, the copper sheet pressing plate penetrates through the upper cover plate and is tightly pressedto the left end of the copper sheet to form a cantilever beam structure, the spray nozzles are formed in the lower surface of the base and communicate with a fluid channel, and a closed cavity accommodating the high-viscosity fluid is defined between the flexible thin film and the base. By means of the cantilever beam piezoelectric microspray mechanism, the high-pressure high-viscosity fluid canbe sprayed.