| 31st week of 2010 patent applcation highlights part 21 |
| Patent application number | Title | Published |
|---|
| 20100194271 | ILLUMINATION DEVICE AND DISPLAY DEVICE USING THE SAME - An illumination device ( | 2010-08-05 |
| 20100194272 | EMISSIVE DEVICE AND ELECTRONIC APPARATUS - An emissive device includes a substrate; a switching element disposed on a surface of the substrate; an insulating layer covering the switching element; a contact hole disposed in the insulating layer; a first electrode disposed on a surface of the insulating layer and electrically connected to the switching element via the contact hole in the insulating layer; a second electrode disposed at a side opposite the substrate with respect to the first electrode; a luminescent layer disposed between the first electrode and the second electrode; and a light shield disposed at a side from which light from the luminescent layer emerges and having a portion covering the contact hole when viewed in a direction perpendicular to the substrate. | 2010-08-05 |
| 20100194273 | OUTDOOR HIGH POWDER LIGHT-EMITTING DIODE ILLUMINATING EQUIPMENT - The invention provides a light-emitting diode illuminating equipment. The light-emitting diode illuminating equipment of the invention includes a heat-dissipating plate device, a plurality of heat-dissipating fins, a diode light-emitting apparatus, a plurality of heat-conducting devices, and a shield device. The heat-dissipating fins extend from a surface of the heat-dissipating plate device. By tightly mounting the heat-conducting devices on the surface of the heat-dissipating plate device and disposing between the heat-dissipating fins, heat generated during the operation of the diode light-emitting apparatus is distributed uniformly on the heat-dissipating plate device and the heat-dissipating fins due to the high efficiency heat-conducting of the heat-conducting devices, and then is dissipated. Besides, the shield device has a waterproof passage for a power cord passing through to power a control circuit, such that the light-emitting diode illuminating equipment is adapted to be installed outdoors. | 2010-08-05 |
| 20100194274 | LIGHT EMITTING DIODE (LED) ARRANGEMENT WITH BYPASS DRIVING - The invention provides a LED arrangement including a LED string of a series arrangement of LED segments. A LED segment includes a single LED or a series arrangement of LEDs. A switching element ( | 2010-08-05 |
| 20100194275 | EL Display Device and Manufacturing Method Thereof - Reducing the manufacturing cost of an EL display device and an electronic device furnished with the EL display device is taken as an objective. A textured structure in which projecting portions are formed on the surface of a cathode is used. External stray light is diffusely (irregularly) reflected by the action of the projecting portions when reflected by the surface of the cathode, and therefore a defect in which the face of an observer or the surrounding scenery is reflected in the surface of the cathode can be prevented. This can be completed without using a conventionally necessary high price circular polarizing film, and therefore it is possible to reduce the cost of manufacturing the EL display device. | 2010-08-05 |
| 20100194276 | VEHICLE HEADLAMP - A vehicle headlamp is provided with: a fixed reflector having reflecting surfaces made of parabola-based free curved faces; movable reflectors having reflecting surfaces made of parabola-based free curved faces; and semiconductor-type light sources having light emitting chips shaped like a planar rectangle. When the movable reflectors are positioned in a first location, a light distribution pattern for low beam is obtained. When the movable reflectors are positioned in a second location, light distribution patterns for high beams are obtained. When the movable reflectors are positioned in a third location, light distribution patterns for daytime running light are obtained. As a result, the vehicle headlamp can achieve downsizing, weight reduction, power saving, and cost reduction. | 2010-08-05 |
| 20100194277 | LED Emergency Light Installed in Lamp Receptacle - The present invention relates to an LED emergency light installed in a lamp receptacle. The LED emergency light includes a light source unit ( | 2010-08-05 |
| 20100194278 | Flow manipulation with micro plasma - The embodiments of the present invention apply the RF or microwave energy on electrically conductive traces and waveguide structures to excite micro plasma, and the micro plasma is manipulated to drive the micro fluid flow. The micro fluid flow is used to cool down electronic device, or used for the applications of gas fluid transportation, gas fluid mixture, and gas fluid reaction. | 2010-08-05 |
| 20100194279 | CONTROL OF A PLURALITY OF PLUG COILS VIA A SINGLE POWER STAGE - A radiofrequency plasma generating device including: a supply circuit including a switch controlled by a control signal for applying a voltage on an output of the control circuit at a control frequency; at least two plasma-generating circuits connected in parallel at the output of the supply circuits, each circuit having its own resonance frequency and being capable of generating plasma when a high voltage level is applied to the output of the supply circuit at a frequency substantially equal to the resonance frequency of the plasma generation circuit; and a supply control device determining the control frequency from the resonance frequencies of the plasma generation circuits to selectively control each circuit according to the control frequency used. | 2010-08-05 |
| 20100194280 | Plasma Supply Device - A plasma supply device generates an output power greater than 500 W at an essentially constant basic frequency greater than 3 MHz and powers a plasma process to which is supplied the generated output power, and from which reflected power is returned to the plasma supply device. The plasma supply device includes at least one inverter connected to a DC power supply, which inverter has at least one switching element, and an output network, wherein the at least one output network includes at least one inductance that has at least one magnetic field strengthening element that is a Perminvar ferrite. | 2010-08-05 |
| 20100194281 | Passive Power Distribution for Multiple Electrode Inductive Plasma Source - Systems, methods, and Apparatus for controlling the spatial distribution of a plasma in a processing chamber are disclosed. An exemplary system includes a primary inductor disposed to excite the plasma when power is actively applied to the primary inductor; at least one secondary inductor located in proximity to the primary inductor such that substantially all current that passes through the secondary inductor results from mutual inductance through the plasma with the primary inductor. In addition, at least one terminating element is coupled to the at least one secondary inductor, the at least one terminating element affecting the current through the at least one secondary inductor so as to affect the spatial distribution of the plasma. | 2010-08-05 |
| 20100194282 | LIGHT-EMITTING DIODE CLUSTER LAMP - The invention relates to a light-emitting diode cluster lamp. The light-emitting diode cluster lamp includes a plurality of light-emitting diode lamp packages, a control circuit, and a casing. Each of the light-emitting diode lamp packages includes a heat-conducting/dissipating module and a light-emitting diode module. The control circuit module is used for controlling the light-emitting diode lamp packages. The casing is adapted to accommodate the light-emitting diode lamp packages and the control circuit module. When the light-emitting diode cluster lamp is connected to a power source, the control circuit module selectively makes the light-emitting diode modules emit light. The heat generated during the light emission of each of the light-emitting diode modules is conducted and dissipated by the corresponding heat-conducting/dissipating module of each of the light-emitting diode modules. | 2010-08-05 |
| 20100194283 | OPTICAL MEASURING APPARATUS - An optical measuring apparatus including: a measuring apparatus body, a lighting unit, a lighting controller. The lighting unit is demountably mounted on the measuring apparatus and has an LED as a light source. The lighting controller is configured to control the lighting unit according to a light intensity command value. The lighting unit includes a storage unit in which a calibration value is stored. The calibration value generates a light intensity corresponding to the light intensity command value. The lighting controller is configured to read calibration values corresponding to the light intensity command value out from the storage unit of the lighting unit upon receipt of the light intensity command value, and controls the LED on the basis of the calibration value. | 2010-08-05 |
| 20100194284 | CIRCUIT ARRANGEMENT FOR OPERATING A CONVERTER - A circuit arrangement for operating a converter, which comprises a bridge circuit having at least a first bridge switch and a second bridge switch and a first bridge center point and a second bridge center point is provided. The circuit arrangement may include a current differential amplifier, the first input of the current differential amplifier being coupled to a first comparison signal input, the second input of the current differential amplifier being coupled to a second comparison signal input, the output of the current differential amplifier being coupled to a control electrode of a first electronic switch. | 2010-08-05 |
| 20100194285 | LIGHT SOURCE DRIVING APPARATUS AND LIGHT SOURCE APPARATUS HAVING THE SAME - A light source driving apparatus includes; a boosting part which boosts an input voltage received from an input part and generates a driving voltage, a boosting transistor which controls an operation of the boosting part, a rectification part connected between the boosting part and an output part and which transmits the driving voltage to the output part, an integrated circuit which generates a gate signal which controls the boosting transistor, and a protection circuit which generates a protection signal which controls a voltage level of the gate signal according to an output current of the boosting transistor. | 2010-08-05 |
| 20100194286 | SERIES-WIRED CHRISTMAS LIGHT STRING WITH OVERCURRENT PROTECTION - A Christmas light string with a resettable fuse, preferably a positive coefficient thermistor, that prevents damage to the string when an overcurrent condition arises. An overcurrent condition in a light string may occur when lights burn out or when too many light strings are placed end to end. When an overcurrent condition exists, the resistance of the resettable fuse rises and reduces the current in the string to prevent damage to bulbs and glass fuses. | 2010-08-05 |
| 20100194287 | ELECTRONIC BALLAST FOR A HIGH INTENSITY DISCHARGE LAMP - An electronic ballast for an HID lamp is described, comprising: a rectifier circuit; a PFC power factor correction circuit increasing the direct current (DC) voltage coming out from the rectifier circuit; a current converter receiving the high voltage DC and converts it to alternating current (AC) to be supplied to the lamp; an ignition circuit generating ignition pulses being fed to the converter circuit to turn on the lamp, the pulses are generated by a downward frequencies scan, and, a control circuit commanding the operation of the ignition circuit and controlling the power being supplied to the lamp according to a power profile being determined by the lightning conditions desired to be obtained from said lamp to save energy. The operative method for the ballast is also described. | 2010-08-05 |
| 20100194288 | ADAPTIVE DISPLAYING SCHEME - A method and a system for improving the psychovisual experience of watching a display are presented. Measurements on the ambient light are performed by a sensor element, from which characteristics of the ambient light are derived. These are subsequently applied in a light-source adjustment model to determine the output of the light-source element. Moreover, a method and a system for adjusting the output of a light-source element by a feed-back loop involving the output from the light-source element and the input to a sensor element are revealed. In addition, the sensor element is also employed for adjusting the output of an electronic display by applying the results of the measurements to a preference model. | 2010-08-05 |
| 20100194289 | ELECTRONIC APPARATUS - An electronic apparatus includes: a luminance adjustable display module; an illuminance sensor configured to detect illuminance around the electronic apparatus; and a controller configured to: read the illuminance from the illuminance sensor; determine luminance corresponding to the illuminance; control the luminance adjustable display module to set luminance to the determined luminance; and set a waiting time based on the determined luminance, the waiting time being a time to a next time point of illuminance reading and luminance control. The controller is configured to set the waiting time short when the determined luminance is high and to set the waiting time long when the determined luminance is low. | 2010-08-05 |
| 20100194290 | ILLUMINATION LIGHT SOURCE DEVICE - A low-cost, high-reliability, high-luminance light source is provided without the need to provide a spare light source. An LED light source device ( | 2010-08-05 |
| 20100194291 | ILLUMINATION APPARATUS - An illumination apparatus includes an image sensor | 2010-08-05 |
| 20100194292 | BACKLIGHT DEVICE AND DISPLAY DEVICE - A backlight device ( | 2010-08-05 |
| 20100194293 | LIGHT EMITTING UNIT ARRANGEMENT AND CONTROL SYSTEM AND METHOD THEREOF - The present invention relates to a control system ( | 2010-08-05 |
| 20100194294 | DRIVING CIRCUIT FOR LIGHT EMITTING ELEMENT, AND ELECTRONIC DEVICE - Multiple LED terminals are provided to multiple LEDs, respectively. Each of these LED terminals is connected to the anode of the corresponding LED. A booster circuit boosts an input voltage. Multiple constant current sources are provided to the multiple LEDs, respectively. One terminal of each of the constant current sources is connected to the corresponding one of the LEDs via the corresponding one of the LED terminals. Multiple switches are provided to the multiple constant current sources, respectively, each of which selectively outputs a voltage selected from the input voltage and the output voltage of the booster circuit to the corresponding constant current source. A control circuit monitors each of the voltages at the multiple LED terminals, and controls the connection state of each of the switches based upon the corresponding voltage. | 2010-08-05 |
| 20100194295 | Field Emission Device - The present invention relates to a field emission device. More specifically, the present invention may prohibit unnecessary voltage from being applied to an anode electrode during non-operating time that no voltage is applied to a gate electrode to reduce driving power, prohibit electrons from being emitted with unnecessary high voltage which is applied to the anode electrode to increase luminous efficiency, and reduce a time that unnecessary high voltage is applied to the anode electrode to extend life time of the field emission device, by applying AC voltage to the anode electrode to correspond to a time that voltage is applied to the gate electrode and a type of voltage which is applied to the gate electrode. Therefore, the present invention comprises a front substrate and a rear substrate which are disposed at a certain distance and opposite to each other; at least one or more cathode electrodes formed on said rear substrate; at least one or more gate electrodes formed to be distant from said cathode electrodes and to be insulated with said rear substrate; emitters formed on the upper surfaces of said cathode electrodes; an anode electrode formed on said front substrate toward said rear substrate side; a fluorescent layer formed on said anode electrode; a first voltage application means for applying an AC voltage to said anode electrode; and a second voltage application means for applying an AC voltage to said gate electrode, wherein the AC voltages being applied to said anode electrode and said gate electrode are synchronized. | 2010-08-05 |
| 20100194296 | LED FLUORESCENT LAMP - Provided is a light-emitting diode (LED) fluorescent lamp using as light sources a plurality of LEDs, which are eco-friendly and can contribute to power conservation. The LED fluorescent lamp includes an LED array including a plurality of LEDs connected in series; first through fourth connection pins; first through fourth capacitors connected to the first through fourth connection pins, respectively; a first diode having an anode connected to a second end of the first capacitor and a cathode connected to a first end of the LED array; a second diode having an anode connected to a second end of the LED array and a cathode connected to a second end of the second capacitor; a third diode having an anode connected to the second end of the LED array and a cathode connected to a second end of the third capacitor; and a fourth diode having an anode connected to a second end of the fourth capacitor and a cathode connected commonly to the first end of the LED array and the cathode of the first diode. The LED fluorescent lamp can be readily used in various types of fluorescent lamp ballasts without a requirement of the installation of additional equipment or the change of wiring. | 2010-08-05 |
| 20100194297 | Light string device - The present invention discloses a light string device to solve the problem of a limited LED quantity in the conventional technology. The light string device of the present invention comprises a plug containing a full-wave voltage-doubling circuit. The full-wave voltage-doubling circuit converts an AC power into a high-voltage signal powering the light string, whereby the present invention can increase the quantity or brightness of LEDs in the light string without replacing the power supply or increasing the cost. | 2010-08-05 |
| 20100194298 | LED DRIVE DEVICE, LED DRIVE METHOD AND LIGHTING SYSTEM - A drive circuit drives LED groups each of which has a plurality of LEDs connected in series. The drive circuit includes nMOSFETs which drive the LED groups, current regulating circuits which determine drain currents of the nMOSFETs, and subtracters which control the current regulating circuits to keep the sum of the current values of adjacent two nMOSFETs constant. The LEDs can be switched on/off efficiently even when there are differences between forward voltages of the LEDs. | 2010-08-05 |
| 20100194299 | METHOD OF DRIVING A LIGHT SOURCE, LIGHT SOURCE APPARATUS FOR PERFORMING THE METHOD, AND DISPLAY APPARATUS HAVING THE LIGHT SOURCE APPARATUS - A method of driving a light source, a light source apparatus for performing the method, and a display apparatus having the light source apparatus are disclosed in accordance with one or more embodiments. In the method, a plurality of light source strings connected in parallel is driven by applying a driving voltage to a first terminal of the light source strings. A peak current due to a voltage deviation of each of the light source strings is switch-controlled to uniform an average current of the light source strings. Thus, a peak current flowing through light source strings in accordance with a voltage deviation of the light source strings is switch-controlled, so that an average current of the light source strings may be uniformly maintained. Therefore, a voltage deviation is not consumed as power, so that damage to circuit elements due to heat may be prevented. | 2010-08-05 |
| 20100194300 | DRIVING METHOD FOR IMPROVING LUMINOUS EFFICACY OF A LIGHT EMITTING DIODE - A driving method for improving luminous efficacy of a light emitting diode (LED), the method comprising: periodically switching a DC current supplied to the LED between a high current level l | 2010-08-05 |
| 20100194301 | Light emitting diode driving circuit - In a driving circuit for controlling a brightness of a light emitting diode based on a duty ratio of a pulse-width modulation signal, an integration circuit is disposed on a connecting line between a gate of a first transistor coupled with a constant current source and a gate of a second transistor coupled in series with a light emitting diode. The integration circuit smoothes a change in a gate voltage of the first transistor and transmit a smoothed change in the gate voltage to the gate of the second transistor. A third transistor is coupled between a ground and a portion of the connecting line located between the gate of the first transistor and the integration circuit. The third transistor is activated and deactivated based on the duty ratio, thereby changing the gate voltages of the first transistor and the second transistor. | 2010-08-05 |
| 20100194302 | STARTUP CONTROL FOR A HIGH PRESSURE DISCHARGE LAMP BALLAST - A high pressure discharge lamp ballast is provided with a control operation for stable transition from a lamp ignition mode into a preheating mode. An inverter is coupled across a DC source and has a plurality of switching elements coupled to the high pressure discharge lamp. A series resonant LC circuit is coupled to the inverter outputs and to the high pressure discharge lamp. A control circuit is coupled to the switching elements and configured to control switching operation. An ignition mode has one or more time periods during each of which a driving frequency of the switching elements is swept through a predetermined range of frequencies and then controlled at a first driving frequency less than the predetermined range of frequencies. A preheating mode follows wherein the switching elements are controlled at a second driving frequency less than the predetermined range of frequencies. | 2010-08-05 |
| 20100194303 | ELECTRONIC BALLAST FOR CORRECTING ASYMMETRICAL CURRENT FLOW ACROSS A GAS DISCHARGE LAMP - An electronic ballast for powering a discharge lamp includes an asymmetry determination circuit functional to determine whether positive and negative polarities of an AC output current to the lamp are symmetrical. An inverter having a plurality of switching elements is coupled to a DC power source and converts the DC power to the AC output current. A control circuit is functional to control the plurality of switching elements dependent upon an operating mode and an output from the asymmetry determination circuit. The control circuit controls the switching elements in a normal mode upon receiving a determination of symmetrical current from the asymmetry determination circuit, and controls the switching elements in a restart mode for a predetermined period of time upon receiving a determination of asymmetrical current from the asymmetry determination circuit. | 2010-08-05 |
| 20100194304 | MULTIPLE LOCATION DIMMING SYSTEM - A multiple location dimming system comprises a plurality of dimmers coupled between an AC power source and a lighting load. Each of the plurality of dimmers is operable to control the intensity of the lighting load and comprises a controllably conductive device, e.g., a triac. The triacs of the plurality of dimmers are coupled in parallel electrical connection. Only an active one of the dimmers is operable to conduct a load current to the lighting load at any given time. A passive dimmer is operable to monitor the voltage across its triac in order to determine when the active dimmer is firing its triac. Accordingly, the passive dimmer is operable to fire its triac before the active dimmer fires its triac in order to “take over” control of the lighting load from the active dimmer to become the next active dimmer. Further, the passive dimmer is operable to determine the amount of power being delivered to the load and display this information on one or more status indicators. | 2010-08-05 |
| 20100194305 | ELECTRONIC BALLAST FOR DISCHARGE LAMP - An electronic ballast for a discharge lamp includes a predictive circuit and a correction circuit in addition to a power conversion circuit including an inverter circuit and a resonant circuit, a drive circuit and a frequency control circuit. The inverter circuit applies load voltage across a load circuit including the lamp via the resonant circuit. The predictive circuit predicts a resonance frequency of the combination of the resonant circuit and the load circuit after ignition of the lamp. The resonance frequency is predicted based on an input signal representing the load voltage in the period of time from the start of sweep of the inverter circuit's operating frequency through a time point immediately after ignition of the lamp. The correction circuit changes the end frequency of the sweep to the resonance frequency. | 2010-08-05 |
| 20100194306 | TRANSFORMER AND POWER SUPPLY APPARATUS USING THE SAME - A transformer includes a first bobbin having a first primary winding and a first secondary winding wound therearound, having a first through hole; a second bobbin having a second primary winding and a second secondary winding wound therearound, having a second through hole; and two divided magnetic cores. A divided magnetic core is composed of center magnetic leg formed from a vertical wall and a side wall vertically linked to rear magnetic plate, with a T-shaped cross section; a first outer magnetic leg placed at one side separated by the vertical wall; and a second outer magnetic leg placed at the other side. The first and second outer magnetic legs are inserted from both sides of the first and second through hole. | 2010-08-05 |
| 20100194307 | POWER CIRCUIT AND ILLUMINATION APPARATUS - A series load circuit is a circuit formed by connecting a light-emitting device unit | 2010-08-05 |
| 20100194308 | LED DRIVER WITH DYNAMIC HEADROOM CONTROL - A voltage source provides an output voltage to drive a plurality of light emitting diode (LED) strings. A LED driver adjusts the level of the output voltage so as to maintain the lowest tail voltage of the LED strings at or near a predetermined threshold voltage so as provide sufficient headroom voltages for current regulators for the LED strings. The LED driver operates in an operational mode and a calibration mode, which can be implemented in parallel with, or part of, the operational mode. During the calibration mode, the LED driver determines, for each LED string, a code value representative of the level of the output voltage necessary to maintain the tail voltage of the corresponding LED string at or near the predetermined threshold voltage. In the operational mode, the code values from the calibration mode are used to control the voltage source to provide an appropriate level for the output voltage. | 2010-08-05 |
| 20100194309 | CONTROLLER FOR DISCHARGE LAMP AND LIGHT SOURCE DEVICE - A control circuit for a discharge lamp, which can improve the lighting performance of the discharge lamp while realizing low power consumption, and a light source device are provided. The resistance value of the variable resistor (R | 2010-08-05 |
| 20100194310 | CONTROL CIRCUIT FOR INVERTER - A reference voltage source generates a reference voltage for adjusting an electric current for a dimming operation. The first current source generates a first current. A first current mirror circuit includes multiple output terminals, duplicates the first current, and outputs multiple first duplicated currents via the multiple output terminals. Multiple first switches are provided on paths for the respective multiple first duplicated currents. A converting resistor, with one terminal set to a fixed electric potential, is provided on a path for the multiple first duplicated currents output from the first current mirror circuit. A decoder circuit receives a control signal from an external circuit, and controls the ON/OFF operations of the multiple first switches. The reference voltage source outputs, as the reference voltage, a voltage that corresponds to a voltage drop that occurs at a converting resistor. | 2010-08-05 |
| 20100194311 | DRIVING DEVICE FOR DISCHARGE LAMP, LIGHT SOURCE DEVICE, PROJECTOR, AND DRIVING METHOD FOR DISCHARGE LAMP - A driving device adapted to drive a discharge lamp including first and second electrodes adapted to generate discharge light, a primary reflecting mirror disposed on a side of the second electrode and adapted to reflect the discharge light, a secondary reflecting mirror disposed on a side of the first electrode and adapted to reflect the discharge light. The driving device includes: a deterioration detection section adapted to detect a degree of progression of deterioration in the first and the second electrodes; and a deterioration handling section adapted to increase first anode power energy, which is supplied while the first electrode acts as an anode, in accordance with the degree of progression of the deterioration detected by the deterioration detection section. | 2010-08-05 |
| 20100194312 | LED Operating Room Light - An operating room light includes a light casing, a reflector and a lighting means, wherein the operating room light is in the form of a single-reflector light. To prevent the operation wound from drying out, it is proposed that LEDs, OLEDs or laser diodes are used as the lighting means. The operating heat occurring can be dissipated outwardly by way of heat conduction and given off to the environment, away from the patient, by heat transfer of material—air and/or by heat radiation. | 2010-08-05 |
| 20100194313 | HIGH VOLTAGE ELECTRICAL CONNECTION LINE - The present invention relates to a high voltage electrical connection line ( | 2010-08-05 |
| 20100194314 | Atmosphere control device - The present invention provides elimination of atmosphere that is not suitable to a space concerned by controlling atmosphere. | 2010-08-05 |
| 20100194315 | POWER TOOLS - One aspect according to the present invention includes a power tool including a control device that can output a brake operation signal to a DC motor to apply a short-circuit brake thereto in response to turning off an operation switch. The brake operation signal is stopped depending on the rotational speed of the motor when the operation switch is turned off during the rotation of the DC motor. | 2010-08-05 |
| 20100194316 | Method and Device for Field-Oriented Regulation of a Polyphase Machine - A method and a device for field-oriented regulation of a polyphase machine. An actual torque of the polyphase machine is ascertained, the ascertained actual torque is compared with a setpoint torque, and in the event that torque differences occur, the setpoint values for the flow-forming current and the torque-forming current are modified to bring the actual torque into agreement with the setpoint torque. The actual torque is calculated with the aid of the power balance of the polyphase machine. | 2010-08-05 |
| 20100194317 | ALTERNATING-CURRENT MOTOR CONTROL APPARATUS - A control apparatus for an alternating-current motor that is driven by an inverter includes a rectangular wave voltage control portion that generates a control command of the inverter such that rectangular wave voltage that has been phase-controlled to make the alternating-current motor operate according to a torque command value is applied to the alternating-current motor; and a phase change control portion that controls a change in the phase to maintain the center of a flux linkage vector locus indicative of a change in a flux linkage of the alternating-current motor before and after a change in the phase of the rectangular wave voltage. | 2010-08-05 |
| 20100194318 | Power Supply System Provided With a Plurality of Power Supplies, and Vehicle Provided With Such Power Supply System - A power supply system is provided with a plurality of driving motors, a power converter, and a plurality of power supplies which supply the driving motors with power and have different output voltages. Each power supply is connected with at least one driving motor through the power converter and with at least one driving motor through a path which does not include the power converter. | 2010-08-05 |
| 20100194319 | CONTROLLER OF ROTARY ELECTRIC MACHINE - A rotary electric machine controller including a current detector detecting rotary electric machine currents generated in a rotary electric machine, a position estimation mechanism outputting an estimated position in accordance with the rotary electric machine currents; a controller outputting voltage commands in accordance with the estimated position; a pulse-width modulator outputting logic signals which are pulse-width modulated in accordance with the voltage commands and with a switching cycle used for pulse-width modulation control; and a voltage application mechanism applying AC voltages for driving the rotary electric machine in accordance with the logic signals. The voltage commands output by the controller are obtained by superimposing, on fundamental voltages for driving the rotary electric machine, position detection voltages which each have a cycle equal to m times of the switching cycle and which are different in phase among respective phases. | 2010-08-05 |
| 20100194320 | Motor control apparatus and motor control method - In a polyphase electric motor, a voltage is sequentially applied to a plurality of windings on a phase-by-phase basis. Then, there is sensed a rotational speed of a rotor, which is rotated by a rotating magnetic field that is generated by sequentially flowing an electric current in the windings on the phase-by-phase basis upon the sequential application of the voltage to the windings. Then, an oscillation frequency of a periodic oscillation, which is generated in the motor at the sensed rotational speed of the rotor, is obtained. Thereafter, it is determined whether the obtained oscillation frequency is a predetermined resonance frequency. Next, the voltage to be applied to the windings is corrected in a manner that reduces a resonance generated in the motor when a result of the determination indicates that the obtained oscillation frequency is the predetermined resonance frequency. | 2010-08-05 |
| 20100194321 | SYSTEMS AND METHODS FOR DYNAMIC FAN SPEED CONTROL IN AN INFORMATION HANDLING SYSTEM - An information handling system includes a processor, memory coupled to the processor, a cooling fan, and a controller coupled to the processor and configured to control the speed of the cooling fan based on the operation of the memory. The processor is configured to determine a user-selected performance setting for the information handling system; determine a fan speed limit corresponding to the user selected performance setting; limit the speed of the cooling fan based on the determined fan speed limit; and in connection with limiting the speed of the cooling fan, control an operational parameter of the memory to reduce cooling demands generated by the memory. | 2010-08-05 |
| 20100194322 | ELECTRIC VEHICLE CONTROLLER - An electric vehicle controller includes a speed sensorless vector controller for estimating the rotating speed of an AC motor from an output voltage command and an output current from a VVVF inverter, and controlling the VVVF inverter based on the estimate. An overhead wire current detector detects the current flowing through an overhead wire. A wrong action sensor senses an abnormality in the speed sensorless vector controller from the sign of the current flowing through the overhead wire and detected by the overhead wire current detector when the VVVF inverter is in operation. A gate stop circuit stops the VVVF inverter when the wrong action sensor senses an abnormality. | 2010-08-05 |
| 20100194323 | ROBUST ON LINE STATOR TURN FAULT IDENTIFICATION SYSTEM - A system and method for identifying turn faults in a stator of a motor are provided. The method includes determining a normalized cross-coupled impedance from the symmetrical components of measured voltages and currents of the motor. Additionally, the normalized cross-coupled impedance may be normalized to a negative sequence impedance. The negative sequence impedance may be determined through a regression analysis using parameters of the motor, such as line-to-line voltage, horsepower, and number of poles. A system is provided that includes a device having a memory and processor configured to determine a normalized cross-coupled impedance, compare the normalized cross-coupled impedance to one or more thresholds, and trigger and alarm and/or trip the motor. | 2010-08-05 |
| 20100194324 | STATOR TURN FAULT DETECTION APPARATUS AND METHOD FOR INDUCTION MACHINE - A system and method are provided for correction of parameters used in determination of stator turn faults of an induction motor. An embodiment may include determining a residual impedance and/or a residual voltage of the motor, and correcting a normalized cross-coupled impedance based on the residual impedance and residual voltage. Additional embodiments may include measuring an operating temperature of the motor and determining a negative sequence impedance of the motor based on the temperature. Another embodiment may include measuring voltages and currents of the motor and determining phasors for the voltages and currents using compensation for variations from a nominal frequency of the motor. | 2010-08-05 |
| 20100194325 | ELECTRIC MOTOR CONTROL - A control system for an electric motor comprises processing means arranged to perform a control process which includes monitoring electrical voltages applied to the motor and electrical currents in the motor, and determining from them the rotational position of the motor. The system is further arranged to monitor at least one parameter of the control process thereby to detect a stall condition of the motor. | 2010-08-05 |
| 20100194326 | HVAC ACTUATOR WITH INTERNAL HEATING - An HVAC actuator configured to function in cold environments by providing a supplemental current component to an HVAC actuator in order to generate supplemental heat to warm the HVAC actuator. | 2010-08-05 |
| 20100194327 | MOTOR CONTROLLER - A motor controller capable of detecting an oscillation of a feedback loop and performing gain adjustment while updating a gain value of a control unit is provided. The motor controller includes an electric motor, an operation-amount detector, a control unit, a machine, a disturbance signal generator which generates a sweep sine wave, a compensation-driving-force detector, a vibration calculator, an oscillation detector, a vibration storage, a simulated open-loop gain calculator, a gain changer, and an automatic gain changer, and detects an oscillation by processing a response signal in time series on the basis of a first threshold regarding to a magnitude of vibration and a second threshold regarding a frequency. | 2010-08-05 |
| 20100194328 | SYSTEM FOR MAINTAINING THERMAL STABILITY OF A MOTION STAGE - A system for maintaining thermal stability of a motion stage driven by a motor comprises a motion current generator operative to produce a motion current to drive the motion stage to move and a thermal current generator operative to produce a thermal current to dissipate heat in the motion stage for controlling a temperature of the motion stage without producing corresponding movement of the motion stage. A summation controller is operative to combine the motion current with the thermal current, and to produce a combined current output to the motor. | 2010-08-05 |
| 20100194329 | SYSTEM AND METHOD FOR DETERMINING STATOR WINDING RESISTANCE IN AN AC MOTOR USING MOTOR DRIVES - A system and method for determining the stator winding resistance of AC motors is provided. The system includes an AC motor drive having an input connectable to an AC source and an output connectable to an input terminal of an AC motor, a pulse width modulation (PWM) converter having switches therein to control current flow and terminal voltages in the AC motor, and a control system connected to the PWM converter. The control system generates a command signal to cause the PWM converter to control an output of the AC motor drive corresponding to an input to the AC motor, selectively generates a modified command signal to cause the PWM converter to inject a DC signal into the output of the AC motor drive, and determines a stator winding resistance of the AC motor based on the DC signal of at least one of the voltage and current. | 2010-08-05 |
| 20100194330 | DEVICE AND METHOD FOR CONTROLLING ALTERNATING-CURRENT MOTOR - A device for controlling an alternating-current motor includes a resolver for detecting a rotational position of an alternating-current motor; and a rectangular wave voltage control unit for performing control based on an output of the resolver to provide a rectangular wave voltage to each phase of the alternating-current motor. The control unit causes an amount of change Δθ in a voltage phase of the rectangular wave voltage of each phase from a switching reference phase of each phase to increase or decrease equally for each switching in one cycle of an electrical angle determined based on the output of the resolver. In this way, a device for controlling an alternating-current motor is provided to restrain occurrence of an offset current upon rectangular wave voltage control. | 2010-08-05 |
| 20100194331 | ELECTRICAL DEVICE HAVING A POWER SOURCE WITH A MAGNETIC CAPACITOR AS AN ENERGY STORAGE DEVICE - The present invention discloses an electrical device. The electrical device comprises an integrated circuit chip with a positive terminal and a negative terminal, wherein the integrated circuit chip has an energy management function; and a magnetic capacitor connecting with the integrated circuit chip, the magnetic capacitor stores electrical power and provides the electrical power to the integrated circuit chip, wherein the magnetic capacitor comprises: a first magnetic section connects with the positive terminal; a second magnetic section connects with the negative terminal; and a dielectric section configured between the first magnetic section and the second magnetic section; wherein the dielectric section is arranged to store the electrical power. | 2010-08-05 |
| 20100194332 | Adjustable Charger - An adjustable charger for compatibly charging at least one rechargeable alkaline battery and at least one first rechargeable battery includes a charger housing and an adjustable charging arrangement. The adjustable charging arrangement includes an upper charging platform, a lower charging platform, and a charging circuitry. The upper charging platform is formed on the top charging side of the charger housing for fittedly and adjustably receiving one of the alkaline battery and the first rechargeable battery in the first charging slot. The lower charging platform is also formed on the top charging side of the charger housing at a position underneath the upper charging platform for fittedly and adjustably receiving another of the alkaline battery and the first rechargeable battery in the second charging slot. | 2010-08-05 |
| 20100194333 | INTRA-ORAL CHARGING SYSTEMS AND METHODS - Systems and methods are disclosed for charging an intra-oral apparatus includes an intra-oral appliance having an appliance charger coil defining a first portion of an electromagnetic loop; and a charger base having a base charger coil defining a second portion of the electromagnetic loop, wherein the appliance charger coil and the base charger coil in combination transfer energy for inductive charging. | 2010-08-05 |
| 20100194334 | RETROFITTING WIRELESS POWER AND NEAR-FIELD COMMUNICATION IN ELECTRONIC DEVICES - Exemplary embodiments are directed to retrofitting existing electronic devices for wireless power transfer and near-field communication. Retrofitting circuitry includes an antenna for receiving a signal from an external source, and conversion circuitry for converting the signal to be used by an electronic device. The antenna and conversion circuitry are configured to retrofit to the electronic device, where the electronic device did not originally include the antenna or conversion circuitry. The antenna and conversion circuitry may be configured to receive and convert the signal to generate wireless power for the electronic device. The antenna and the conversion circuitry may also be configured to enable the electronic device to send and receive near-field communication data. | 2010-08-05 |
| 20100194335 | WIRELESS POWER AND DATA TRANSFER FOR ELECTRONIC DEVICES - Exemplary embodiments are directed to wireless power. A wireless charging device may comprise a charging region configured for placement of one or more chargeable devices. The charging device may further include at least one transmit antenna configured for transmitting wireless power within the charging region. Furthermore, the charging device is configured to exchange data between at least one chargeable device of the one or more chargeable devices. | 2010-08-05 |
| 20100194336 | INDUCTIVELY CHARGEABLE AUDIO DEVICES - An inductively enabled audio speaker is disclosed configured to receive power inductively from an inductive power outlet. The audio speaker device has a voice coil which, as well as being able to produce an audible output, is further configured to function as a secondary inductor to inductively couple with a primary inductor. The inductively enabled audio speaker may be used to power an electrical device such as a Bluetooth earpiece, a telephone or the like. | 2010-08-05 |
| 20100194337 | RECHARGEABLE HAND-HELD DEVICE AND CHARGER THEREFOR - A hand-held device has a rechargeable battery, with contacts connected to the battery, and a ferromagnetic body. A charger has contacts complementary to and engageable with the contacts of the device and a magnet capable of attracting the ferromagnetic body of the device and holding the device in a charging position with the contacts of the device engaging the contacts of the charger. | 2010-08-05 |
| 20100194338 | Battery-operated screwdriver and charger shell therefor - A battery-operated screwdriver has a housing with a handle, a rechargeable battery, charge contacts for charging the battery on a charger shell having to at least one detachably mounted bit holder for storing tool inserts of the battery-operated screwdriver in captive fashion, so that the battery-operated screwdriver is placeable on the charger shell and a charging mode is produced automatically, and a charger shell for a battery-operated screwdriver has at least one detachable mountable bit holder configured to receive a plurality of bits which in operation are insertable in communication with the battery-operated screwdriver. | 2010-08-05 |
| 20100194339 | BATTERY PACK AND BALANCING METHOD OF BATTERY CELLS - A balancing method for a battery pack includes balancing battery cells near an end of discharge. A deep discharge of the battery cells can be prevented without using an overdischarge control unit. One battery cell balancing method includes: a balancing check condition determination step for determining whether or not a maximum voltage out of voltages of the battery cells is smaller than a reference voltage; a balancing start condition determination step for determining whether or not a residual capacity difference or voltage difference between the individual battery cells exceeds a reference value; a balancing time calculation step for calculating a balancing time for discharging the battery cell that exceeds the reference value; and a balancing operation step for discharging the selected battery cell when the battery cells are under charge or are at rest or when a discharge current of the battery cells is smaller than a reference current. | 2010-08-05 |
| 20100194340 | CHARGE AND DISCHARGE SYSTEM OF SECONDARY BATTERY AND METHOD OF CONTROLLING CHARGE AND DISCHARGE OF SECONDARY BATTERY - An electronic device includes a secondary battery having at least one bare cell, the secondary battery including a charge/discharge switching module for placing the secondary battery in one of a charging state for charging the at least one bare cell or a discharging state for discharging the at least one bare cell; and an analog front end for generating an analog signal based on information of the secondary battery and for transmitting the analog signal out of the secondary battery; and a processor external to the secondary battery for receiving the analog signal from the analog front end and for controlling the charge/discharge switching module in accordance with the analog signal. | 2010-08-05 |
| 20100194341 | DEVICE AND METHOD FOR IMPROVED BATTERY CONDITION LEARN CYCLE - Embodiments of the invention include a device and method for improved battery learn cycles for battery backup units within data storage devices. The backup unit includes a first battery pack, a corresponding charge capacity gauge, one or more second battery packs, a corresponding charge capacity gauge, and a controller switch configured to select only one battery pack for a learn cycle at any given time. The charge capacity gauges are such that, at the end of the learn cycle discharge phase, the depth of discharge of the learn cycle battery pack is such that the charge capacity of the learn cycle battery pack combined with the full charge capacity of the remaining battery packs is sufficient for the device cached data to be off-loaded to a physical data storage device, and the data storage device does not have to switch from a write-back cache mode to a write-through cache mode. | 2010-08-05 |
| 20100194342 | POWER SUPPLY SYSTEM AND CELL ASSEMBLY CONTROL METHOD - The power supply system of this invention includes a cell assembly in which a first assembled battery, formed from a plurality of first cells connected in series, and a second assembled battery, formed from a plurality of second cells connected in series, are connected in parallel, and a generator. An average charging voltage V | 2010-08-05 |
| 20100194343 | BATTERY STATE MONITORING CIRCUIT AND BATTERY DEVICE - Provided are a battery state monitoring circuit and a battery device which are capable of inhibiting discharge without enabling an overdischarge cell balance function when an overcurrent detection circuit detects a discharge overcurrent, without the need for an additional terminal of the battery state monitoring circuit. A detection signal of the overcurrent detection circuit is input to each of a communication terminal for overdischarge signal and a communication terminal for overcharge signal included in the battery state monitoring circuit provided on a side of the overcurrent detection circuit. An overdischarge cell balance circuit outputs a cell balance signal when an overdischarge detection signal indicates an overdischarge non-detected state, an overdischarge signal indicates an overdischarge detected state, and an overcharge signal indicates an overcharge non-detected state. | 2010-08-05 |
| 20100194344 | Combining Two or More DC to DC Converters to Limit External Coils - This disclosure relates to a voltage converter including a control circuit, a converter sub-circuit, and a single coil, where when the voltage converter can perform bi-directional voltage conversion using the single coil. In other words, the voltage converter can generate one or more regulated output voltages in both directions from one or more input voltages using the same coil. | 2010-08-05 |
| 20100194345 | MULTI-CELL BATTERY PACK PROTECTION CIRCUIT - A voltage detection circuit can include a status sensing network and a comparing network. The status sensing network can simultaneously detect a cell voltage for each battery cell of a plurality of battery cells. The comparing network can simultaneously compare the detected cell voltages with a predetermined voltage threshold by comparing the maximum of the cell voltages with a first (high-voltage) threshold, and by comparing the minimum of the cell voltages with a second (low-voltage) threshold. The comparing network can also generate an indication signal when a cell voltage does not satisfy the respective voltage threshold. | 2010-08-05 |
| 20100194346 | PROTECTION CIRCUIT FOR BATTERY PACK AND BATTERY PACK INCLUDING THE SAME - A protection circuit for a battery pack including a rechargeable battery cell having a positive electrode and a negative electrode is disclosed. The protection circuit includes a self-discharge switching device electrically connected to the positive electrode and the negative electrode of the battery cell, and a control unit electrically connected to the battery cell and the self-discharge switching device to turn-on or turn-off the self-discharge switching device according to a temperature of the battery cell. | 2010-08-05 |
| 20100194347 | BATTERY METHOD OF CHARGING AND DISCHARGING THE BATTERY AND CHARGE-DISCHARGE CONTROL DEVICE FOR THE BATTERY - A method of charging and discharging a battery that includes an anode. The anode includes silicon and is capable of inserting and extracting lithium. At the time of charge, the potential of the anode vs. lithium metal as a reference potential is 0.04 V or more. At the time of discharge, the potential of the anode vs. lithium metal as a reference potential is 1.4 V or less. | 2010-08-05 |
| 20100194348 | Systems and methods for waking up a battery system - Systems and methods for waking up a battery system (e.g., battery pack such as a smart battery pack) installed in an information handling system from a shipping mode in response to the occurrence of one of at least two detected events. The first of these of these at least two events is detection of the battery system being removed and reinstalled into operational electrical contact with the information handling system, and the second of these at least two events is the activation of a user input device provided for the battery system. | 2010-08-05 |
| 20100194349 | ROUTER DEVICE - The router device acquires detected temperature T from a thermistor provided inside the battery box containing secondary battery that provide the power supply, and if the detected temperature T is not smaller than a threshold value Th | 2010-08-05 |
| 20100194350 | ELECTRICAL CONNECTION BETWEEN DEVICES - Concepts for forming an electrical connection between devices are disclosed. A cord for transferring electrical power and signals can be provided to connect a first device to a second device. One or more magnetic couplings can be provided to exert magnetic forces between the cord and the first device and/or between the cord and the second device. The one or more magnetic couplings can allow transfer of electrical power and signals therethrough. | 2010-08-05 |
| 20100194351 | CHARGING METHOD AND CHARGER - A charging method for charging a secondary battery includes the steps of: (a) performing constant-current charging with a first current; and (b) when a voltage of a secondary battery reaches a first voltage, performing constant-voltage charging at the first voltage. When a temperature of the secondary battery is equal to or higher than a reference temperature in step (a), step (b) includes the steps of (b1) when the voltage of the secondary battery reaches a second voltage lower than the first voltage, performing constant-voltage charging at the second voltage, (b2) after step (b1) and when the temperature of the secondary battery falls below the reference temperature, performing charging with a second current, and (b3) when the voltage of the secondary battery reaches the first voltage, performing constant-voltage charging at the first voltage. | 2010-08-05 |
| 20100194352 | CHARGING CIRCUIT, CHARGING APPARATUS, ELECTRONIC EQUIPMENT AND CHARGING METHOD - A charging circuit includes a monitoring part configured to monitor a battery voltage applied to a battery and configured to output an overvoltage signal when the battery is in an overvoltage condition a protection part configured to electrically disconnect the battery from an adaptor when receiving the overvoltage signal, and a switch which, when the battery is electrically disconnected from the adaptor, switches a monitoring node for an adaptor voltage outputted from the adaptor, from a supply node of the battery voltage to a supply node of a system voltage, which is applied to a system electrically connected with the battery and the adaptor, based on the overvoltage signal to cause a control command for controlling the adaptor voltage based on the system voltage to be outputted. | 2010-08-05 |
| 20100194353 | RV CONVERTER WITH CURRENT MODE AND VOLTAGE MODE SWITCHING - A switched mode converter is disclosed that includes both voltage mode and current mode control. The switched mode converter also includes mode logic for switching between a voltage mode and a current mode. The converter includes current sensing circuitry for sensing the switcher current on the primary side of the transformer and the load current on the secondary side as well as voltage sensing circuitry for sensing the converter output voltage. When the load current is less than a predetermined value, the converter operates in a voltage mode. During the voltage mode, the output voltage of the voltage mode controller is used to control the duty cycle of a pulse width modulation (PWM) controller. When the load current is greater than a predetermined value, the converter operates in a current mode. In a current mode, the primary switcher current is used to control the PWM controller. As such, during a light load in which the converter is voltage controlled, there is no need for a minimum load to stabilize the control loop. In a current-mode, the control loop will have a relatively faster transient response and avoid flux imbalance in push-pull topology. As such, the converter provides the advantages of both known voltage controlled and current controlled switched mode converters. In addition, by the careful arrangement of the locations of a EMC filter, a primary heat sink, a secondary heat sink, a power transformer T | 2010-08-05 |
| 20100194354 | CHARGING MONITOR - A charging monitor has: a switch that is disposed between a load section having a storage battery and an external AC power supply supplying a current to the load section via a plurality of lines and interrupts the supply of the current from the external AC power supply to the load section; a current detection circuit that outputs a detection signal corresponding to a difference in level between currents flowing through the lines; a suppression circuit that suppresses a DC component contained in the detection signal; a filter circuit that filters a plurality of frequency components contained in the detection signal so that attenuation increases as a frequency becomes high; a rectifier smoothing circuit that rectifies and smoothens an output signal obtained when the detection signal passes through the filter circuit and the suppression circuit; and an electric leakage determination circuit that detects an electric leakage and shuts off the switch when the level of the signal smoothened by the rectifier smoothing circuit exceeds a preset reference level. | 2010-08-05 |
| 20100194355 | POWER-GENERATION CONTROL APPARATUS FOR IN-VEHICLE ELECTRIC ROTATING MACHINE - There can be performed the best power-generation control without enlarging the apparatus, deteriorating the reliability, and raising the cost. The power-generation control apparatus is provided with a power-generation amount suppression determination unit that determines whether or not to change a power-generation amount suppression level for suppressing the power-generation amount of the in-vehicle electric rotating machine, based on a present generation-voltage command value generated by a generated-voltage command unit and a generated-voltage past command value based on a past generated-voltage command value stored in a generated-voltage command storage unit, and that determines whether or not the power-generation amount suppression control is required, based on at least one of a past value and a present value of the generated-voltage command; therefore, there can be performed the best power-generation control without enlarging the apparatus, deteriorating the reliability, and raising the cost. | 2010-08-05 |
| 20100194356 | WELD SETTING BASED ENGINE-DRIVEN GENERATOR CONTROL SYSTEM AND METHOD - A system and method are provided for controlling an internal combustion engine driving a generator/welder or a stand-alone generator. The engine and/or the generator is controlled based upon settings for welding. Controlling the engine may include altering the engine speed based upon a detected demand on the generator and/or operating parameters of a welder. | 2010-08-05 |
| 20100194357 | CONTROL SYSTEM AND A METHOD OF CONTROLLING OF A TCSC IN AN ELECTRICAL TRANSMISSION NETWORK, USING IN PARTICULAR AN APPROACH OF THE LYAPUNOV TYPE - A system and method of controlling a TCSC disposed on a high voltage line of an electrical transmission network. The system comprises: (a) a voltage measuring module; (b) a current measuring module; (c) a regulator, working in accordance with a non-linear control law to receive on its input the output signals from the two modules for measuring voltage and current, and a reference voltage corresponding to the fundamental of the voltage which is to obtained across the TCSC; (d) a module for extracting the control angle in accordance with an extraction algorithm; and (e) a module for controlling the thyristors (T | 2010-08-05 |
| 20100194358 | Standby Power Consumption Limiting Device - A standby power consumption limiting device is provided for connection between an electricity supply and an electrical appliance of the kind having a main on/off switch, two power supply input terminals and a standby mode control circuit operable, when the appliance is switched “on”, to place the appliance in a reduced power standby mode. The device comprises standby mode detection means ( | 2010-08-05 |
| 20100194359 | MULTI-OUTPUT DC-DC CONVERTER - A DC-to-DC converter for using a single input supply to generate a plurality of power outputs at different voltages (Vout | 2010-08-05 |
| 20100194360 | METHOD AND SYSTEM OF REGULATING VOLTAGES - Regulating voltages. At least some of the illustrative embodiments are systems including a switching circuit configured to produce an intermediate voltage signal from an input voltage signal, and a first voltage regulator coupled the switching circuit and configured to produce a first regulated voltage signal from the intermediate voltage signal. The switching circuit is configured to create the intermediate voltage signal based on a switching signal having a duty cycle, and wherein the duty cycle of the switching signal is open-loop with respect the intermediate voltage signal and the first regulated voltage signal. | 2010-08-05 |
| 20100194361 | ASYMMETRIC TOPOLOGY TO BOOST LOW LOAD EFFICIENCY IN MULTI-PHASE SWITCH-MODE POWER CONVERSION - Techniques for performing DC to DC power conversion in switch-mode converter circuits include combinations of dynamic switch shedding, phase shedding, symmetric phase circuit topologies, and asymmetric phase circuit topologies. In at least one embodiment of the invention, a method of operating a power converter circuit includes operating a first phase switch circuit portion using a first number of switch devices when the power converter circuit is configured in a first mode of operation. The first number is greater than zero. The method includes operating the first phase switch circuit portion using the first number of switch devices when the power converter circuit is configured in a second mode of operation. The method includes operating a second phase switch circuit portion using a second number of switch devices when the power converter circuit is configured in the second mode of operation. The second number is greater than the first number. | 2010-08-05 |
| 20100194362 | REGULATOR WITH PULSE WIDTH MODULATION CIRCUIT - A pulse width modulation circuit that controls the output voltage of a regulator. The regulator includes a switching element, which is activated and deactivated by a pulse signal, and a PMW control circuit, which provides the switching element with the pulse signal in accordance with a duty ratio determined from a reference voltage and an error voltage. The error voltage is the difference between the output voltage and reference voltage. The PWM control circuit includes a current source that generates a current in accordance with the error voltage, a capacitor arranged between the current source and ground, and a comparator. The comparator has a non-inverting input terminal, which is connected between the current source and capacitor, and an inverting input terminal, to which the reference voltage is applied. An output signal of the comparator is provided to the switching element. | 2010-08-05 |
| 20100194363 | Apparatus for generating high-voltage and method thereof - Provided are a high voltage generating apparatus controlled by a digital control code and a method thereof. The high voltage generating apparatus includes a switching unit for controlling a voltage induced at the secondary coil of a power transformer by an interrupt operation, wherein the interrupt operation interrupts the current flowing through the primary coil of the connected power transformer. A digital controller for controlling the interrupt operation of the switching unit according to the control data. A digital interface for providing the control data to the digital controller is provided. The control data is extracted from the control code transferred using one of a plurality of predetermined communication protocols. The switching unit, digital interface, and digital controller can be implemented in one ASIC (application-specific integrated circuit) chip. | 2010-08-05 |
| 20100194364 | Switching Power-Supply Control Circuit - A switching-power-supply control circuit comprising: a first control circuit to operate a first transistor applied with an input voltage at an input electrode thereof and a second transistor connected in series to the first transistor, based on a first feedback voltage and first reference voltage, the first feedback voltage corresponding to an output voltage obtained through a connection point between the first and second transistors; and a second control circuit to allow the first control circuit to turn on/off the first and second transistors in a complementary manner so that the first feedback voltage becomes equal to the first reference voltage, when a second feedback voltage rising with rise of the output voltage is lower than a second reference voltage, and allow the first control circuit to turn off the second transistor, when the second feedback voltage is higher than the second reference voltage, according to the output voltage. | 2010-08-05 |
| 20100194365 | METHOD AND APPARATUS TO REDUCE MAXIMUM POWER FROM A POWER SUPPLY WITH TRANSITION REGION REGULATION - Techniques are disclosed to regulate the output power of a power supply. An example feedback circuit for use in a power supply regulator includes a voltage regulation circuit coupled to sense an output voltage of the power supply regulator. The voltage regulation circuit is coupled to generate a first regulation signal to regulate an output of the power supply regulator if an output current of the power supply is less than a first transition current. A current regulation circuit is coupled to sense an output current of the power supply regulator. The current regulation circuit is coupled to generate a second regulation signal to regulate the output of the power supply regulator if the output voltage of the power supply is less than a second transition voltage. A transition region regulation circuit is coupled to sense the output voltage and the output current of the power supply regulator. The transition region regulation circuit is coupled to generate a third regulation signal to regulate the output of the power supply regulator if the output current of the power supply is between the first transition current and a second transition current. The feedback circuit is coupled to generate a feedback signal output in response to the first, second and third regulation signals. | 2010-08-05 |
| 20100194366 | DC/DC Converter and Method for Controlling a DC/DC Converter - A DC/DC converter comprises an inductive element (L) having a first terminal connected to an input connection ( | 2010-08-05 |
| 20100194367 | METHOD AND APPARATUS TO REGULATE AN OUTPUT VOLTAGE OF A POWER CONVERTER AT LIGHT/NO LOAD CONDITIONS - An example apparatus to regulate an output voltage of a power converter at light/no load conditions includes a driver circuit, a feedback circuit, and an adjustable voltage reference circuit. The driver circuit is coupled to output a drive signal to switch a power switch between an ON state and an OFF state to regulate an output of the power converter. The feedback circuit is coupled to the driver circuit and is further coupled to output an enable signal to switch the power switch to an ON state in response to an output voltage signal. The adjustable voltage reference circuit is coupled to adjust a voltage reference such that a bias winding voltage of the power converter is adjusted nonlinearly in response to a load that is to be coupled to the output of the power converter. | 2010-08-05 |
| 20100194368 | Current driving method and circuit - A circuit comprises an inductor, a load, and a controllable switching device arranged in either a first configuration: switchable between the load being bypassed and the inductor energised, and current flowing through the load, and the inductor discharging energy into the load; or, a second configuration: switchable between current being permitted to flow through the load, inductor and controllable switching device in series, energising the inductor, and the current flowing through the load, and the inductor discharging energy into the load. The circuit further comprises control means for controlling the switching device, a load current sensing resistor connected in series with the load, and a demand signal input. Monitoring means is arranged to monitor the demand signal and the voltages across the sense resistors, and generate a monitor signal. The control means is arranged to receive the monitor signal and to switch the switching device in response the monitor signal exceeding a predetermined threshold. | 2010-08-05 |
| 20100194369 | DC-DC CONVERTER AND SWITCHING CONTROL CIRCUIT - A switching control circuit for controlling on/off of a switching element for driving an inductor for voltage conversion, the switching control circuit including: a voltage comparator for determining whether an output voltage of the inductor is in a first state where the output voltage is equal to or higher than a predetermined electric potential or in a second state where the output voltage is lower than the predetermined electric potential; a timing determination unit for determining an on-timing to turn on the switching element based on a clock signal having a predetermined frequency even when the output voltage is in the first state; and a drive control circuit for generating a driving signal to turn on or turn off the switching element based on an output signal of the timing determination unit. | 2010-08-05 |
| 20100194370 | Reverse Current Sensing Regulator System and Method - A reverse current sensing (RCS) regulator system and method is provided. One embodiment of the invention includes a RCS regulator system. The system comprises a RCS comparator that monitors a drain voltage of a LS FET and is configured to switch states at a zero crossing point to provide an indication of the start of a reverse current condition. The system further comprises a RCS evaluator that measures a drain voltage of the LS FET upon receiving an indication that the LS FET has been turned off by the driver logic circuit and adjusts an offset to the RCS comparator to adjust the trip point of the RCS comparator relative to the drain voltage if the measured drain voltage falls outside a predetermined threshold. | 2010-08-05 |
