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870results about How to "Stable current" patented technology
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Circuit and method for driving an array of light emitting pixels
ActiveUS20070080908A1Stable currentMaintaining image qualityElectrical apparatusElectroluminescent light sourcesSignal correctionEngineering
A technique for driving a column of pixels that include light emitting elements is presented. The technique incorporates feedback data provided from feedback data sources connected to the data line and to feedback line of the array, pixel driving circuit with feedback path. The technique can also include block of the reference elements for input signal corrections.
Owner:IGNIS INNOVATION
Method and system for providing a magnetic element having a current confined layer
InactiveUS7672086B1Current uniformityStable currentRecord information storageManufacture of flux-sensitive headsCurrent limitingEngineering
A method and system for providing a current confined magnetic element is disclosed. The method and system include providing a pinned layer, providing a nonmagnetic spacer layer, and providing a free layer. The nonmagnetic spacer layer resides between the pinned layer and the free layer. The method and system also include sputtering a current confinement layer. The current confinement layer includes an insulator and a conductor that are immiscible. The conductor forms a plurality of nano-dots in an insulating matrix. At least a portion of the plurality of nano-dots extends through the current confinement layer.
Owner:WESTERN DIGITAL TECH INC
Circuit and method for driving an array of light emitting pixels
ActiveUS7978187B2Stable currentMaintain image qualityElectrical apparatusElectroluminescent light sourcesSignal correctionData source
Owner:IGNIS INNOVATION
System and driving method for active matrix light emitting device display
ActiveUS20060125408A1Stable currentAccelerated programStatic indicating devicesActive matrixDisplay device
Active matrix light emitting device display and its driving technique is provided. The pixel includes a light emitting device and a plurality of transistors. A capacitor may be used to store a voltage applied to a driving transistor so that a current through the light emitting device is independent of any shifts of the transistor and light emitting device characteristics. A bias data and a programming data are provided to the pixel circuit in accordance with a driving scheme.
Owner:IGNIS INNOVATION
System and driving method for active matrix light emitting device display
Active matrix light emitting device display and its driving technique is provided. The pixel includes a light emitting device and a plurality of transistors. A capacitor may be used to store a voltage applied to a driving transistor so that a current through the light emitting device is independent of any shifts of the transistor and light emitting device characteristics. A bias data and a programming data are provided to the pixel circuit in accordance with a driving scheme.
Owner:IGNIS INNOVATION
Controlled Bleeder for Power Supply
InactiveUS20080048573A1Stable strengthOvercome disadvantagesElectrical apparatusElectroluminescent light sourcesControl circuitDischarge current
An LED backlighting system including: a control circuit; a power source; at least one LED string associated with the power source, the at least one LED string being arranged to be switchably connected to alternatively draw an illumination current from the power source and not draw an illumination current from the power source; and a controlled bleeder arranged to draw a bleed current from the power source responsive to the control circuit; the control circuit being operative to draw the bleed current from the power source via the controlled bleeder for a predetermined time period associated with the alternatively drawing and not drawing the illumination current of the at least one LED string.
Owner:POLARIS POWERLED TECH LLC
Step-up/step-down DC-DC converter and portable device employing it
ActiveUS20050007089A1Stable currentStable output voltageDc-dc conversionElectric variable regulationTriangular waveVoltage reference
In a step-up / step-down DC-DC converter, an error signal commensurate with a difference between a voltage commensurate with the output voltage and a predetermined reference voltage and a triangular wave signal are compared by a first comparator, whose output is used to turn on and off a step-up switching circuit. An inverted signal obtained by inverting the error signal and the triangular wave signal are compared by a second comparator, whose output is used to turn on and off a step-down switching circuit. The median level between the outputs of the first and second comparators is set to be lower than the maximum level of the triangular wave signal and higher than the minimum level thereof. Thus, when step-up and step-down modes are switched from one to the other, an overlap period is produced during which the step-up and step-down modes overlap. This makes possible smooth switching between the step-up and step-down modes.
Owner:ROHM CO LTD
DC lateral voltage controllable 4 quadrant frequency transformer and method thereof
InactiveCN101425756AMeet the control real-time requirementsGuaranteed two-way flowAC motor controlConversion with intermediate conversion to dcFrequency changerTransformer
The invention provides a controllable four-quadrant frequency converter for voltage on direct current side and a method thereof, so as to realize direct-current voltage control, improve the quality of the current on line side and feedback the regenerative electric energy to an electric network. The controlling circuit of the frequency converter adopts a single processor and an integrated chip to drive a converter on line side and a converter on motor side to alternately fulfill the functions of rectification and inversion under different loaded states. The processer designed by pipelining can quicken the calculation speed and meets the requirement of real time of controlling of the PWM rectifier, due to the adoption of the vector control and power disturbance compensation method, the unity power factor can be realized when the bidirectional flow of the energy is ensured, the voltage on the direct current side can be accurately controlled, when the load is disturbed, the fluctuation range is smaller, the current on direct current side is estimated, the cost of the products can be saved, the estimation method adopts direct direct-current estimation instead of non alternating current estimation, the disturbance compensation fluctuation is reduced, and the system power is more smooth.
Owner:东元总合科技(杭州)有限公司
Switching constant-current power supply
InactiveUS6909249B2Stable load currentStable currentElectroluminescent light sourcesApparatus without intermediate ac conversionEngineeringFeedback circuits
Disclosed herein is a switching constant-current power supply which comprises: a switching-system power converter for supplying a predetermined current to a load; a current detector for generating a feedback signal in correspondence with the load current; a controller for driving the power converter in correspondence with the feedback signal; and a feedback circuit, which is provided between the current detector and the controller, and comprises a signal holding unit, the feedback circuit supplying either a first feedback signal, output from the current detector, or a second feedback signal, output from the signal holding unit, to the controller; the size of the second feedback signal being approximately equal to the first feedback signal at a given time.
Owner:TOKYO
Solid state image sensing device
ActiveUS20050001905A1Improve the immunityImprove stabilityTelevision system detailsPrinted circuit detailsImage sensingHigh potential
Each of a pair of power supply electric lines (11 and 12) connected to power supply pads of a solid state image sensor (1) and a pair of power supply electric lines (13 and 14) connected to power supply pads of an integrated circuit chip (2) is arranged so that the power supply electric lines included in each power supply electric line pair are in parallel with each other and has a very small gap between them. The power supply electric lines (11 to 14) have a certain width and bend portions that are curved smoothly with a predetermined curvature or less and are formed on a flexible wiring board (3). In each of the solid state image sensor (1) and the integrated circuit chip (2), the high-potential and low-potential power supply pads are arranged side by side.
Owner:RENESAS ELECTRONICS CORP
Step circuit board with gold-masking copper-plating hybrid surface process and manufacture method thereof
InactiveCN102946693ASolve the problem of burning boardThe plated area is stablePrinted circuit detailsPrinted circuit manufactureElectricityScreen printing
The invention discloses a manufacture method for a step circuit board with a gold-masking copper-plating hybrid surface process. The manufacture method comprises the steps of cutting materials, transferring an inner pattern, browning and pressing a plate, drilling, plating copper, electroplating the whole plate, adhering a thick gold dry film, achieving pattern transfer for the first time through exposing and developing, exposing a local electrical thick gold part, plating copper, nickel gold and electrical thick gold on the electrical thick gold part, removing the film, adhering a dry film, achieving pattern transfer for the second time through exposing and developing, exposing a part needing plating copper, plating copper, removing the film, silk-screen printing a wet film, achieving pattern transfer for the third time through exposing and developing, exposing a needed outer circuit, adhering a dry film to completely cover a PTH (Plated Through Hole) through exposing and developing, etching an outer circuit, removing the film, carrying out AOI (Automated Optical Inspection) to the outer layer, silk-screen printing and resistance-welding, lettering, forming, electrically testing, carrying out an OSP (Organic Solderability Preservatives) surface process, carrying out final inspection, packaging and shipping. The gold-masked copper-plated step circuit board manufactured by the method disclosed by the invention can achieve more compact assembling needs and a better adhering effect.
Owner:GUILIN UNIV OF ELECTRONIC TECH
Driving circuit of light emitting diode and lighting apparatus
InactiveUS8098021B2Stable currentStable voltageElectrical apparatusElectroluminescent light sourcesVoltage converterDriving current
A driving circuit of a light emitting diode (LED) includes a rectifier unit, a voltage-dividing circuit, a control unit, a voltage converter, a resistance and a capacitor. The rectifier unit rectifies an AC power to generate a first operation voltage. The voltage-dividing circuit generates a voltage-dividing signal. The control unit includes a regulating unit and a pulse width modulation (PWM) unit. An output terminal of the regulating unit is coupled to the PWM unit. The PWM unit outputs a PWM signal. The voltage converter adjusts a driving voltage and a driving current of the LED. The resistance is coupled between an output terminal of the regulating unit and a diode. The capacitor is coupled between a power input terminal of the regulating unit and a ground terminal. The PWM unit adjusts the PWM signal according to the voltage-dividing signal and a feedback signal output by the voltage converter.
Owner:CAL COMP ELECTRONICS
Laser temperature performance compensation
InactiveUS20060153256A1Calibrates stabilizesMaximize signal transmission reliabilitySemiconductor lasersLaser cooling arrangementsMathematical modelOptical power
The invention presents a method that calibrates the laser optical power in a continuous manner without disrupting the flow of information in the optical communications link. The method utilizes knowledge of the measured value of the laser optical power and makes necessary adjustments to optimize the values of the Extinction Ratio, Bit Error Rate and to compensate for aging. The method utilizes knowledge of the temperature from a sensor and mathematical models, which contain parameters which are updated for a specific laser configuration.
Owner:TECEY SOFTWARE DEV KG +1
AMOLED pixel driving system and AMOLED pixel driving method
ActiveCN106548753AImprove stabilityStable currentStatic indicating devicesDriver circuitCompensation effect
The invention provides an AMOLED pixel driving system and an AMOLED pixel driving method. The AMOLED pixel driving system comprises a 4T1C (four thin-film transistors and one capacitor) pixel driving circuit and an initial voltage power supply module electrically connected with the pixel driving circuit. The initial voltage power supply module provides a high-level initial signal for the pixel driving circuit in the light emitting stage. The threshold voltage of a driving thin-film transistor can be compensated effectively, and the current flowing through an organic light emitting diode can be stabilized. Moreover, the leakage currents of the gate and the source of the driving thin-film transistor in the light emitting stage can be reduced, and the stability of compensation data in the light emitting stage and the threshold voltage compensation effect can be improved.
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
Memory and sensitive amplifier
The invention discloses a memory and a sensitive amplifier, wherein the sensitive amplifier comprises a pre-charging unit, a bit line adjusting unit, a current mirror unit, a comparison unit, a reverse unit, a bias unit and an output unit, wherein the reverse unit is connected between the input end and the output end of the current mirror unit and is coupled with the voltage of a data wire node and the voltage of a data node; and the bias unit is used for biasing the voltage of the data node to the preset voltage value when the bit line is pre-charged. The memory and the sensitive amplifier solve the problem that output data are mistaken because the voltage of the data rises when the pre-charging of the bit line is finished.
Owner:SHANGHAI HUAHONG GRACE SEMICON MFG CORP
Control of a brushless motor
ActiveUS20110254489A1Simplifies control of motorCheap and simpleMotor/generator/converter stoppersSynchronous motors startersBrushless motorsMotor speed
A method of controlling a brushless motor that includes exciting a winding of the motor until current in the winding exceeds a threshold, and then continuing to excite the winding for an overrun period. The length of the overrun period is adjusted in response to a change in one of time, motor speed and excitation voltage. Additionally, a control system that implements the method, and a motor system that incorporates the control system.
Owner:DYSON TECH LTD
Dual bipolar magnetic field for rotary high-voltage contactor in automotive lithium-ion battery systems
InactiveUS20120181953A1Weakening rangeReduce arcingContact mechanismsElectric motor controlAutomotive batteryElectrical battery
A device and method for operating automotive battery system relays and related switches. By aligning a magnetic field with a direction of current flow in a contact plate disposed between magnets that are producing the field, a generated Lorentz force can be used to promote arc extinguishing during a relay opening sequence, while simultaneously reducing the tendency of the Lorentz forces to interfere with the operation of a solenoid or other switch-activating mechanisms. By using a rotary-based mechanism to establish contact between a contact plate and current-carrying terminals, the likelihood of inadvertent opening of the relay is reduced. Such devices and methods may be used in conjunction with hybrid-powered and electric-powered vehicles.
Owner:GM GLOBAL TECH OPERATIONS LLC
Pixel circuit, drive method thereof, array substrate and display panel
ActiveCN104299570AStable currentImprove displayStatic indicating devicesCapacitive couplingUltrasound attenuation
The invention discloses a pixel circuit, a drive method of the pixel circuit, an array substrate and a display panel. The pixel circuit comprises a first transistor, a second transistor, an organic light-emitting diode and a voltage stabilization unit. According to the pixel circuit, because the voltage stabilization unit is arranged between the second electrode of the first transistor and the grid electrode of the second transistor serving as a driving tube, even through second signals received by a second signal input end are unsteady because of capacitive coupling and electric leakage on the periphery of the pixel circuit or attenuation in one frame of display, steady voltage signals can be obtained after the signals pass through the voltage stabilization unit, the voltage signals are applied to the grid electrode of the second transistor, the second transistor can be stably controlled, and therefore the open second transistor can obtain steady drain electrode current, the current flowing through the organic light-emitting diode can be more stable, and the display effect of the display panel can be improved.
Owner:XIAMEN TIANMA MICRO ELECTRONICS +1
Controlled bleeder for power supply
InactiveUS7605550B2Stable strengthOvercome disadvantagesElectrical apparatusElectroluminescent light sourcesControl circuitElectrical current
Owner:POLARIS POWERLED TECH LLC
Structure, electron emitting device, secondary battery, electron source, and image display device
InactiveUS20070188067A1Thickness of oxide film can be reducedWell formedMaterial nanotechnologyDischarge tube luminescnet screensFiberCarbon fibers
The present invention prevents the oxidization of a member of carbon fibers and improves the electric connection between the carbon fibers and the member of carbon fibers. In the present invention, a member 5 of carbon fibers 4 includes: a first element selected from the group consisting of IVa group elements and Va group elements; a second element selected from the group consisting of C, Al, Si, Cr, and Zr; and N. Preferably, the first element is Ti. More preferably, the member 5 includes Al or Si and the ratio of Al or Si to Ti is not less than 10 atm % and not more than 30 atm %.
Owner:CANON KK
Induction electric power transmission control device and method
ActiveCN104716752ATransmission MaximizationSmooth transmissionElectromagnetic wave systemCircuit arrangementsElectric power transmissionPhase shift control
The invention provides an LCL type induction electric power transmission control device. The LCL type induction electric power transmission control device comprises a primary grade part and a secondary grade part, and is characterized in that the primary grade part is provided with two closed loops, namely a frequency converting control loop and a phase-shifting control loop; the frequency converting control loop adopts a frequency tracking method to control the frequency of a high-frequency inverter circuit door control signal; and the phase-shifting control loop adopts a phase-shifting control policy of an intelligent subdivision control algorithm to control a phase-shifting angle of the high-frequency inverter circuit door control signal. The LCL type induction electric power transmission control device is only used for controlling at the primary grade, and a conventional information feedback channel does not need to be used between the primary grade and the secondary grade.
Owner:HUNAN UNIV +1
Energy-Saving Lamp with Remote Control and Button Dimming Feature
ActiveUS20110089847A1Low costSimple structureElectrical apparatusElectric light circuit arrangementRemote controlEmbedded system
This invention relates to a kind of dimmable energy-saving lamp with remote control and buttons dimming feature comprising: a power supply module (1), one end of which being connected to municipal power supply via the button-dimming switch (K), another end of which being connected to different parts of the whole circuit including the SCM control module (2), an SCM control module (2), the output end of which being connected to the dimming control module (3), the signal output end of said dimming control module (3) being connected to the signal input end of the energy-saving lamp tube as well as the energy-saving lamp tube as the illuminating component; the invention further features: a remote-control transmitting module (5) for transmitting wireless signals at least including dimming signals; a remote-control receiving module (6) for receiving wireless signals at least including dimming signals, the output end of said remote-control receiving module (6) being connected to an input end of said SCM control module (2); adopting remote control and button operation, this invention can achieve smooth dimming of energy-saving lamp tube within a large scope, making it a remote control energy-saving lamp capable of stepless dimming.
Owner:CHANGXING POTEK ELECTRONICS & TECH CO LTD
Method of forming a vertical diode and method of manufacturing a semiconductor device using the same
ActiveUS20080200014A1Stable drive currentStable currentSolid-state devicesSemiconductor/solid-state device manufacturingPhase-change memoryDevice material
A method of forming a vertical diode and a method of manufacturing a semiconductor device (e.g., a semiconductor memory device such as a phase-change memory device) includes forming an insulating structure having an opening on a substrate and filling the opening with an amorphous silicon layer. A metal silicide layer is formed to contact at least a portion of the amorphous silicon layer and a polysilicon layer is then formed in the opening by crystallizing the amorphous silicon layer using the metal silicide layer. A doped polysilicon layer is formed by implanting impurities into the polysilicon layer. Thus, the polysilicon layer is formed in the opening without performing a selective epitaxial growth (SEG) process, so that electrical characteristics of the diode may be improved.
Owner:SAMSUNG ELECTRONICS CO LTD
Solid state image pickup element and camera system
InactiveUS20090184236A1Low consumption powerLow noiseTelevision system detailsTelevision system scanning detailsSolid-stateVoltage reference
A solid state image pickup element includes a pixel unit having a plurality of pixels for photoelectric conversion disposed in a matrix shape and a pixel signal read circuit for reading pixel signals in the unit of a plurality of pixels from the pixel unit. The pixel signal read circuit includes a plurality of comparators disposed in correspondence with a pixel column layout for performing comparison judgment between a read signal potential and a reference voltage and outputting a judgment signal and a plurality of counters each for counting a comparison time of a corresponding one of the comparators, an operation being controlled by an output from a corresponding one of the comparators. The comparators include a first amplifier for performing a comparison operation between the reference voltage and the read signal potential and inverting an output at a predetermined comparison point, a second amplifier for forming a current path when an output of the first amplifier is inverted, to output an output of the first amplifier by gain up, and a current control circuit for shutting the current path of the second amplifier when an output level of the second amplifier exceeds a predetermined threshold level.
Owner:SONY CORP
Electrochemical cells with ionic liquid electrolyte
InactiveUS20110212359A1Improve ionic conductivityWide electrochemical stability windowPrimary cell to battery groupingAlkaline accumulatorsLithiumIonic liquid
The present invention provides a lithium-ion electrochemical cell comprising an ionic liquid electrolyte solution and a positive electrode having a carbon sheet current collector.
Owner:LEYDEN ENERGY
Flexible light emitting diode (LED) display screen
InactiveCN101582225AElectrically connected toTo achieve the effect of controlPrinted circuit non-printed electric components associationIdentification meansEngineeringLED display
The invention relates to a flexible light emitting diode (LED) display screen which is realized by a method that a plurality of LED devices and conducting wires are arranged on a flexible substrate, and the LED devices and the conducting wires are electrically connected, thus, the utilization area of the flexible LED display screen can be adjusted as required, and the flexible LED display screen can be applied to application surfaces of planes or curved surfaces of different specifications as a display screen for a display board. Through the material characteristic of flexible plasticity of the flexible substrate, the flexible LED display screen can be flexibly jointed on the application surface effectively so as to improve the convenience of use and construction of the flexible LED display screen in a back gum pasting mode.
Owner:BLUE STAR LIGHTING TECH
Nonvolatile memory device and method for fabricating the same
ActiveUS8507976B2Reduce channel resistanceStable currentSolid-state devicesRead-only memoriesMain channelDielectric layer
A nonvolatile memory device includes a gate structure in which a plurality of interlayer dielectric layers and a plurality of gate electrodes are alternately stacked; a pass gate electrode lying under the gate structure; a sub channel hole defined in the pass gate electrode; a pair of main channel holes defined through the gate structure and communicating with the sub channel hole; a channel layer formed on inner walls of the pair of main channel holes and the sub channel hole; and a metallic substance layer contacting the channel layer in the sub channel hole.
Owner:SK HYNIX INC
Semiconductor device and power supply using the same
InactiveUS20090243575A1Offset errorStable currentDc-dc conversionElectric variable regulationControl signalVoltage reference
A semiconductor device for control applied to a constant-voltage power supply device includes a digital-analog converter circuit which outputs a reference voltage corresponding to a value of a first register with taking an output voltage of a reference voltage source as a criterial reference voltage, and generates a control signal for driving a power semiconductor device based on an output voltage of an error amplifier which differentially amplifies a feedback voltage obtained by resistive-dividing on an output voltage of the constant-voltage power supply device and the reference voltage. An analog-digital converter circuit which converts the feedback voltage to a digital value with taking the output voltage of the constant-voltage power supply device as a reference voltage is provided, and based on the output, a value of a first register is corrected so as to offset an effect of an error in voltage dividing ratio of a voltage dividing resistor circuit.
Owner:RENESAS ELECTRONICS CORP
Power source terminal structure
InactiveUS7806738B2Improve reliabilityStable currentCoupling contact membersClamped/spring connectionsElectric current
Owner:NEXTRONICS ENG CORP
Organic light emitting display panel and fabrication method therefor
InactiveCN106783921AStable currentLuminous stabilitySolid-state devicesSemiconductor/solid-state device manufacturingCapacitancePower flow
Owner:TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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