51st week of 2010 patent applcation highlights part 19 |
Patent application number | Title | Published |
20100320898 | IMAGE DISPLAY APPARATUS - An image display apparatus includes: an electron-emitting electrode having a gate electrode a cathode electrode including a plurality of strip portions opposing to the gate electrode through a gap, wherein each gap functions as an electron emitting portion when a potential difference between a gate potential and a cathode potential is applied to the each gap; and a light-emitting member emitting light responsive to an irradiation with electrons emitted from an electron emitting portion. The plurality of the strip portions of the cathode electrode are arranged in a line along a predetermined direction. Intervals each between mutually adjacent strip portions of the cathode electrode are arranged such that the interval in a central region of the electron emitting portions is larger than that in a peripheral region thereof. | 2010-12-23 |
20100320899 | ELECTRO-LUMINESCENT DEVICE INCLUDING METAL-INSULATOR TRANSITION LAYER - Provided is an electro-luminescent device (ELD) including a metal-insulator transition (MIT) layer. The ELD includes: a substrate; a EL phosphor layer positioned on the substrate and comprising luminescent center ions generating light; the MIT layer disposed on a surface of the EL phosphor layer and being abruptly changed from an insulator to a metal according to a variation of a voltage; a first insulator adhered to the MIT layer to distribute a voltage applied from an external source; and a second insulator disposed on the other side of the EL phosphor layer. | 2010-12-23 |
20100320900 | WELDING AID FOR A SPIRAL-WOUND FILAMENT - Disclosed are a welding aid for a spiral-wound filament of a lamp and a lamp comprising such a welding aid. The spiral-wound filament has a spiral-wound filament body and at least one spiral-wound filament tail. The welding aid is arranged at a distance d from the spiral-wound filament body and is designed to connect the at least one spiral-wound filament tail to a current-conducting support, the distance d being defined in accordance with a power P at which the lamp is operated. | 2010-12-23 |
20100320901 | PLASMA DISPLAY PANEL - A high definition plasma display panel which can display a video of a higher brightness and yet can be driven at a low power consumption is realized. To this end, a plasma display panel includes front panel including display electrode formed on glass substrate, dielectric layer | 2010-12-23 |
20100320902 | Heat dissipation enhanced LED lamp - A LED lamp which could directly replace an ordinary tungsten, halogen, or electricity-saving light bulb includes a filament, a lamp base and a thermally conductive electric insulator. The filament includes at least one AC LED device, and the thermally conductive electric insulator is filled in a cavity of the lamp base to mechanically contact with the filament and an electrode of the lamp base. When the AC LED device is powered on, the thermally conductive electric insulator provides a thermal channel to transfer heat from the filament to the electrode for heat dissipation enhancement. The LED lamp can be directly inserted into an ordinary bulb socket that is generally used in lighting fixtures, without having to modify the system of the lighting fixtures or use an additional adapter. | 2010-12-23 |
20100320903 | HEAT DISSIPATION ENHANCED LED LAMP - A LED lamp which could directly replace an ordinary tungsten, halogen, or electricity-saving light bulb, includes a LED filament, a lamp base, a thermally conductive electric insulator, and a mask. The thermally conductive electric insulator is filled in a cavity of the lamp base, and includes a first portion mechanically contacting the LED filament and an electrode of the lamp base to provide a first thermal channel from the LED filament to the lamp base, and a second portion adhering the mask to the lamp base to provide a second thermal channel from the lamp base to the mask. By using the mask to enlarge the heat dissipation area, a better heat dissipation effect is achieved. | 2010-12-23 |
20100320904 | LED-Based Replacement Lamps for Incandescent Fixtures - A luminaire takes the form of a bulb-shaped, LED-based lamp, which can replace a conventional incandescent bulb. | 2010-12-23 |
20100320905 | PLASMA LAMP USING A SHAPED WAVEGUIDE BODY - A plasma lamp for an electrodeless plasma lamp having a shaped dielectric waveguide body. The shaped body may have a relatively thin region containing a bulb, and a second region thicker than the first region. Microwave probes may be positioned in the second region to provide power to the waveguide body. The body may be shaped to intensify the electric field in the first region adjacent to the bulb to allow operation at a lower frequency than a solid cylindrical or rectangular waveguide body having the same volume and dielectric constant. | 2010-12-23 |
20100320906 | Electrodeless Lamps with Grounded Coupling Elements - An electrodeless plasma lamp includes a bulb containing a gas-fill and light emitter(s) excited to produce light using radio-frequency (RF) energy. Input and output coupling elements separated from each other by a gap couple RF energy from an RF source to the bulb. One end of the input coupling element is electrically connected to an RF source while the other end is connected to ground. One end of the output coupling element is connected to ground while the other end is connected to the bulb. | 2010-12-23 |
20100320907 | LIGHT SOURCE DEVICE AND PROJECTOR INCLUDING LIGHT SOURCE DEVICE - An optical source device includes a solid high frequency oscillating unit that outputs a high frequency signal, a waveguide that receives the high frequency signal output from the solid high frequency oscillating unit and radiates the received high frequency signal as a microwave, and a light emitting unit that emits light by the microwave radiated from the waveguide unit. A container of the waveguide unit has a space surrounded by reflective surfaces that reflect the microwave radiated from the antenna unit so as to collect the microwave. A projector includes this optical source device, an optical modulating unit that modulates a light beam emitted from the light emitting unit of the optical source device according to image information to form an optical image, and a projecting unit that projects the optical image formed by the optical modulating unit. | 2010-12-23 |
20100320908 | Light emitting diode illumination apparatus and power supply module thereof - A power supply module is formed as a package body suitable to be assembled in a light emitting diode illumination apparatus. The power supply module includes a light emitting diode driver, a feedback control unit, a current converting unit, and a package material. The light emitting diode driver, the feedback control unit, and the current converting unit are packaged integrally by the package material. The current converting unit is suitable for supplying power to the light emitting diode driver and the feedback control unit. The feedback control unit is suitable to receive a feedback signal from a light source module disposed outside of the package body and provide an adjusting signal to the light emitting diode driver, so as to make the light emitting diode driver to adjust the magnitude of a control current and provide the control current to the light source module. | 2010-12-23 |
20100320909 | DISPLAY APPARATUS - Display apparatuses are enhanced in reliability in such a manner that external moisture is prevented from penetrating display regions and planarization layers are prevented from being stripped off. In particular, in a display apparatus including a display region containing organic light-emitting devices arranged on a circuit substrate, a bank-separating region separating a bank is provided in a planarization layer-separating region separating a planarization layer, an end portion of the planarization layer is covered with the bank, an end portion of an organic protective layer extending over the display region is spaced from a portion of the planarization layer that is located outside the bank-separating region and a portion of the bank that is located outside the bank-separating region, and the inorganic protective layer and an end portion of the bank that is disposed in the display region are covered with an inorganic protective layer. | 2010-12-23 |
20100320910 | LIGHTING UNIT AND DISCHARGE LAMP - Provided is a lighting unit and a discharge lamp each of which is capable of causing a capacitor to break down by heat generated in a heat generating component, so that circuit operation is safely terminated without any additional cost. A compact self-ballasted fluorescent lamp is provided with a lighting unit ( | 2010-12-23 |
20100320911 | LAMP HEAT DISSIPATING STRUCTURE - A heat dissipating structure for a lamp includes at least an illuminating element, a lamp base, a metal housing, a ring-shaped coil and a metal base. The metal housing has a great heat conducting capability, and the illuminating element is mounted on the lamp base, which is engaged with the metal housing. The ring-shaped coil which includes a primary winding and a secondary winding wound on a ring iron core is mounted between the metal housing and lamp base, wherein the ring iron core further includes an inner space for accommodating plural electronic components connected with the secondary winding, and the ring-shaped coil is electrically connected with the illuminating element and metal base. And, the metal base is electrically connected to a power source, so that through a conduction of the metal base, the ring-shaped coil can acquire and transform electricity to provide to the illuminating element for operation. | 2010-12-23 |
20100320912 | MAGNETICALLY INSULATED COLD-CATHODE ELECTRON GUN - A system and method of magnetically insulating the cathode of a cold-cathode electron gun is achieved. A strong magnetic field is applied in the vicinity of the cold cathode to deflect and constrain the flow of electrons emitted from structures within the electron gun. The magnetic field largely prevents re-reflected primary and secondary electrons from reaching the cathode, thereby improving the operation and increasing the life of the cold-cathode electron gun. In addition, the insulating magnetic field improves electron beam focusing and enables a reduction in the magnitude of static electric focusing fields employed in the vicinity of the cold cathode, further reducing the electron gun's susceptibility to destructive arcing. | 2010-12-23 |
20100320913 | LIGHT EMITTING DIODE (LED) MODULE WITH TIME DELAY FUNCTION - The present invention provides a light emitting diode LED module with a time-delay lighting function, having an LED light-emitting unit on the power input circuit. The power input circuit for the LED light-emitting unit is connected with main power supply, backup power supply and backup power controller. The backup power supply and LED light-emitting unit are connected in parallel. At least two circuits are formed at the output end of the main power supply, one of which is connected with LED light-emitting unit for power supply and lighting purpose, and the other one of which is connected with the backup power supply via the backup power controller, allowing for charging/discharging of the backup power supply. | 2010-12-23 |
20100320914 | SAFE LIGHTING SYSTEM - A lighting system comprising a light source, a fiber rope into which light emitted from the light source is coupled, and a control unit for controlling the optical power of light emitted by the light source to maintain the fiber rope at or below a predetermined upper temperature even if the fiber is partially or fully severed. | 2010-12-23 |
20100320915 | Flourescent lighting system - Methods and apparatus for providing a Fluorescent Lighting System are disclosed. In one embodiment, the present invention may be used as a fluorescent lamp ballast which is controlled using a non-resonant circuit that allows the ballast to lower to fifty percent the light output of the lamp while providing a corresponding fifty percent reduction in energy used. | 2010-12-23 |
20100320916 | Plasma Generator and Discharge Device and Reactor Using Plasma Generator - A plasma generator has a first member | 2010-12-23 |
20100320917 | ENERGY-SAVING STREET LIGHTING CONTROL SYSTEM - A lighting control system for controlling a luminaire includes detection module and a control unit. The detection module is configured to detect traffic flow of a road and ambient light along the road. The control unit coupled with the detection module is configured to receive a detection result of the detection module and generate a control signal according to the detection result and a preset data stored therein for controlling illumination of the luminaire. | 2010-12-23 |
20100320918 | Illuminated Bollard with Safety Light for Loading Dock - A combination dock light, safety light, and bollard serves the purposes of all three, without having any sensitive structure projecting out from the bollard into the traffic lane at the loading dock. A trailer lamp assembly within the bollard projects out a window cutout at an upper end of the tubular metal body of the bollard. A red/green safety light is visible through an elongated cutout on the proximal side of the bollard. A photo eye turns the lamp on when the loading dock door is opened, and off when the dock door is closed, and also switches the safety light to green or to red depending on whether the dock door is opened or closed. | 2010-12-23 |
20100320919 | METHOD AND APPARATUS FOR MODIFYING PIXELS BASED AT LEAST IN PART ON AMBIENT LIGHT LEVEL - In accordance with an example embodiment of the present invention, an apparatus configured to detect an ambient light level and modify one or more pixels to display in a power conserving manner based at least in part on the ambient light level. | 2010-12-23 |
20100320920 | Decorative Lamp for Displaying Snowing or Water-Flowing Pattern - The present invention relates to a decorative lamp for displaying snowing and water-flowing pattern, comprising a rectification power supply, a controller and a lamp series section connected in sequence, wherein the lamp series section is composed of a plurality of LED strings connected in parallel or in series. The controller comprises an integrated circuit including a plurality of outputs and switch devices for controlling sequentially flashing of the LED strings. Each of the switch devices has two terminals electrically connected in series to a loop of the respective LED string. Each of the LED strings has respective terminal connected to a common terminal which is a direct current output terminal of the rectification power supply, the other terminal of the LED string is connected to the respective switch device. | 2010-12-23 |
20100320921 | Light emitting device driving apparatus and method for driving the same - The present invention relates to a light emitting device (LED) driving apparatus that constantly maintains the average current flowing onto a plurality of channels. The light emitting device (LED) driving apparatus includes: a LED light source unit in which at least one LED channel is connected in parallel; at least one current detector that is disposed on a low end of a LED channel of the LED light source unit to detect the current flowing onto respective LED channels; at least one channel current controller that generates control signal controlling the average current of the channels by comparing current detected from the channels with reference wave; and a switching element that controls the average current of the LED channels in a PWM scheme according to the control signals. | 2010-12-23 |
20100320922 | ILLUMINATION DEVICE INCLUDING LEDS AND A SWITCHING POWER CONTROL SYSTEM - Disclosed herein is an illumination device including light-emitting diodes, an alternating current input, a full-wave rectifier coupled to the alternating current input and configured to produce a rectified voltage output and a power converter, the power converter having a switching element electrically coupled to the rectified voltage output of the full-wave rectifier. An improvement of the illumination device includes a feedback circuit configured to determine an average current across the light-emitting diodes and to invert a signal representing the average current to provide a switching signal to the switching element such that, for a range of operating points, increasing a current drawn into the power converter will decrease LED power and decreasing the current drawn into the power converter will increase LED power. | 2010-12-23 |
20100320923 | DISCHARGE LAMP LIGHTING APPARATUS - In a discharge-lamp lighting apparatus, a switching frequency of an AC voltage applied to an LC series circuit including an inductor and a capacitor is swept near a frequency having a value provided by dividing the resonant frequency of the LC series circuit by an odd number at startup of a discharge lamp and is set to a frequency near or greater than the frequency after the sweeping after the switching frequency is swept to control the on-off duty ratio of switching elements in a DC-AC inverter circuit and, after the operation at startup of the discharge lamp is repeated once or more times, the switching frequency is set to less than the frequency after the sweeping to light the discharge lamp. | 2010-12-23 |
20100320924 | DEVICE FOR CONTROLLING A DISCHARGE LAMP - An electro magnetic ballast ( | 2010-12-23 |
20100320925 | METHOD OF FORMING A FLASH CONTROLLER FOR A CAMERA AND STRUCTURE THEREFOR - In one embodiment, a flash controller for a camera is configured with a plurality of flash control channels that each control a value of a current through a light source. The value and timing of the current is controlled responsively to control words received by the plurality of flash control channels. | 2010-12-23 |
20100320926 | Sine wave light modulation control method and device - A light modulation control method applied to control a lamp is disclosed. The control method includes the following steps: first, providing an AC voltage; then, rectifying the AC voltage into a first DC pulse; modulating the first DC pulse into a modulated wave; filtering the modulated wave into a second DC pulse; finally, alternatingly switching the second DC pulse to a modulated AC voltage for the lamp through a switching unit. | 2010-12-23 |
20100320927 | Power Reforming Methods and Associated Multiphase Lights - The present invention relates to power reforming methods and associated multiphase lights, especially to power reforming methods and associated multiple lights that selectively turn ON and OFF to reform current to follow voltage appropriately, which provides better heat dissipation, improving power factor and color mixing capability. The method comprises acts of rectifying an AC voltage to a pulsating DC voltage, synchronizing an internal time base signal to the pulsating DC voltage, setting pulse duration in a pulse period and turning ON and OFF of an electronic device. The device comprises at least two loads, a rectifier, at least two drivers and a controller. | 2010-12-23 |
20100320928 | WHITE LIGHT EMITTING APPARATUS AND LINE ILLUMINATOR USING THE SAME IN IMAGE READING APPARATUS - A white light emitting apparatus includes a light source section in which a first white LED that emits white light whose chromaticity deviates to a blue side from a predetermined white region of a CIE chromaticity diagram and a second white LED that emits white light whose chromaticity deviates to a yellow side from the predetermined white region are adjacently disposed so as to emit light with optical axes in substantially the same direction, and a current regulator that independently drives the blue LED chip in the first and second white LEDs, respectively. A color mixture of lights emitted from the first and second white LEDs is adjusted to a chromaticity of the predetermined white region using the current regulator. | 2010-12-23 |
20100320929 | LIGHTING FIXTURE SYSTEM FOR ILLUMINATION USING COLD CATHODE FLUORESCENT LAMPS - A lighting system for illuminating a chamber in a building includes a lighting fixture suitable for being mounted onto a surface of the chamber, so that light emitted by at least one CCFL device mechanically supported by the fixture illuminates the chamber. The one CCFL device includes at least one transformer. A driver adapted to be connected to a surface of the chamber is capable of converting input power from a power source to an AC power having a voltage in the range of about 5-400 volts at a frequency in the range of about 1 kc-100 kc. The at least one transformer is suitable for converting the AC power to an output power suitable for operating the at least one CCFL, causing the at least one CCFL to emit light. Physically separating the driver from the at least one CCFL device reduces the adverse effects of heat generated by the at least one CCFL device on the driver and increasing the useful life of the CCFL lighting system. A controller may be used to control light emitted substantially simultaneously by a plurality of the above lighting systems, such as for large commercial or public area illumination, by sending signals to the drivers to control the amount of power that is supplied to the CCFLs. Different power may be separately supplied to CCFLs having different phosphors in each of a plurality of CCFL devices in a plurality of the lighting systems, to adjust substantially simultaneously the color temperature of light emitted by the lighting systems. | 2010-12-23 |
20100320930 | LIGHTING APPARATUS - A lighting apparatus including a reflector having a reflective exterior surface partially enclosing an interior space and defining a focal point within the interior space, and a high pressure discharge lamp positioned substantially at the focal point of the reflective exterior surface. In some examples, the high pressure discharge lamp includes an arc tube containing mercury, a metal halide, or sodium. In some examples, the reflective exterior surface extends along a longitudinal axis and curves around the longitudinal axis. In some example, the reflective exterior surface defines an elliptical paraboloid. | 2010-12-23 |
20100320931 | DRIVING A LIGHT-EMITTING DIODE - An input stage ( | 2010-12-23 |
20100320932 | LED LAMP - An LED light lamp includes a lamp body, an adjusting rod, a number of light panels, and at least one rheostat. The lamp body defines a chamber therein. The adjusting rod includes a sliding bar, and an adjustable panel extending outwards from and surrounding an end of the sliding bar. The sliding bar is slidably received in the chamber of the lamp body. The adjustable panel includes an annular periphery. Each light panel includes a number of LED chips distributed on the light panel, and is pivotally mounted on the lamp body and against the annular periphery of the adjustable panel. A rheostat is electrically coupled into a power supply circuit of the LED chips. The resistance of the rheostat is adjusted to control the current flowing through the LED chips by the sliding bar when the sliding bar slides in the lamp body. | 2010-12-23 |
20100320933 | ILLUMINATION DEVICE - An illumination device for illuminating a road includes a light source, a solar cell module, a sensor and a control module. The light source includes a plurality of light emitting elements and an optical element. Light generated from the light emitting elements passes through the optical element and is emitted from the illumination device at a half-intensity angle of between −20° and 20° with respect to a road surface. The solar cell module is electrically connected to the light emitting elements, and converts light directly into electricity. The sensor detects environmental brightness. The control module is electrically connected to the solar cell and the light emitting elements. The control module controls the current to the light emitting elements to adjust the brightness of the light emitting elements. | 2010-12-23 |
20100320934 | CIRCUITS AND METHODS FOR DRIVING A LOAD WITH POWER FACTOR CORRECTION FUNCTION - A circuit for driving a load includes a power line, converter circuitry, and a controller. The power line is operable for providing an input current and an input voltage. The converter circuitry coupled to the power line is operable for converting the input voltage to a regulated voltage to drive the load, and for providing a current detection signal indicating whether a converter current flowing through the converter circuitry drops to a predetermined level. The controller coupled to the converter circuitry is operable for correcting a power factor of the circuit based on the current detection signal and the input voltage such that a waveform of the input current follows a waveform of the input voltage. | 2010-12-23 |
20100320935 | CURRENT-REGULATED POWER SUPPLY WITH SOFT-START PROTECTION - A current-regulated power supply provides soft-start protection to prevent the generation of large in-rush currents. The current-regulated power supply includes a current regulation module that operates in either a soft-start mode of operation or a normal mode of operation and a mode selection module that makes mode of operation determinations. In particular, mode-selection module monitors the load current supplied to the attached load and maintains the current-regulation module in the soft-start mode of operation until the monitored load current exceeds a threshold value, at which time the mode-selection module causes the current regulation module to operate in the normal mode of operation. | 2010-12-23 |
20100320936 | HIGH-VOLTAGE LED DRIVE SCHEME WITH PARTIAL POWER REGULATION - A high-voltage LED drive scheme with multi-stage power regulation. The multi-stage power regulation applies two components of voltage to drive the LED strings. This scheme achieves high efficiency, small size and low cost. | 2010-12-23 |
20100320937 | POWER SUPPLY CIRCUIT FOR POWERING LIGHT EMITTING DIODE - A power supply circuit for receiving an input voltage and outputting a driving voltage to at least one LED string. The power supply circuit includes a rear-stage converting circuit and a control circuit. The rear-stage converting circuit is used for receiving the input voltage and converting the input voltage into a compensating voltage. The control circuit is connected to the rear-stage converting circuit and the LED string for detecting the magnitude of a current passing through the LED string, thereby controlling the current passing through the LED string to be identical. The driving voltage is outputted from the power supply circuit. The driving voltage is a summation of the input voltage and the compensating voltage. | 2010-12-23 |
20100320938 | METHOD OF DRIVING A GAS-DISCHARGE LAMP - The invention describes a method of driving a gas-discharge lamp ( | 2010-12-23 |
20100320939 | LIGHT EMITTING DIODE ILLUMINATING SYSTEM AND CONTROLLING METHOD THEREOF - A light emitting diode (LED) illuminating system includes an LED lamp, a sensor, a memory, a controller, an AC/DC convertor, a DC/DC convertor and a current detector. The sensor detects a temperature around the LED illuminating system. The memory stores the detected temperature and a comparison table. The controller finds an optimized working voltage in the comparison table, according to the detected temperature. The AC/DC converter outputs a DC power with the optimized working voltage. The DC/DC converter converts the DC power into another DC power and supplies the another DC power to the LED lamp. The current detector detects a current variation of the another DC power. The controller stabilizes a current of the another DC power output by the DC/DC converter to the LED lamp, according to the current variation. | 2010-12-23 |
20100320940 | Monitoring Device and Method of Monitoring Programmable Lamps - A monitoring device for programmable lamps ( | 2010-12-23 |
20100320941 | MULTI-CORE LIGHT ENGINE ARCHITECTURE - The present invention relates to a LED lighting system ( | 2010-12-23 |
20100320942 | Electron gun used in particle beam device - An electron gun used in a particle beam device, for example in an electron microscope, has a relatively good brightness and may be operated under vacuum conditions which can be easily achieved (i.e., for example, at a residual pressure of about 10 | 2010-12-23 |
20100320943 | SHAPE MEMORY ALLOY DRIVER - A shape memory alloy driver comprises a displacement detection portion, a drive control portion, and a compensation calculation portion. The displacement detection portion detects displacement of a shape memory alloy based on a resistance value etc. detected from the shape memory alloy. The drive control portion applies a voltage or current to the shape memory alloy by servo control to thereby displace the shape memory alloy to a target displacement value fed from a microcomputer etc. The compensation calculation portion calculates a compensated displacement value from the detected displacement value and a variation—attributable to the environment temperature—of the drive control value which the drive control portion uses for controlling the voltage or current. Having been fed with the compensated displacement value, the drive control portion varies the drive control value such that the compensated displacement value is equal to the target displacement value. | 2010-12-23 |
20100320944 | Braking Circuit for a Door Actuator with a Generatively Operable Electrical Motor - A braking circuit is adapted to supply generatively produced energy of the motor as load resistance to a bipolar transistor. The braking circuit has a voltage regulator, which controls a voltage, applied to the base terminal of the bipolar transistor to achieve an associated controlled voltage based on a reference voltage. A first power supply connector of the electrical motor, in the generator mode of operation of the electrical motor, is coupled to a collector terminal of the bipolar transistor and to the voltage input of a voltage regulator. A second power supply connector of the electrical motor is coupled to an emitter terminal of the bipolar transistor and is coupled to a reference input of the voltage regulator via a resistive branch including at least one electrical resistor. | 2010-12-23 |
20100320945 | MOTOR DRIVE SYSTEM USING POTENTIAL AT NEUTRAL POINT - According to input parameters, a controller carries out: generation of a voltage command value for each of d- and q-axes; conversion of the voltage command value for each of the d- and q-axes into a voltage command value for each of the multiphase windings; and control of a multiphase inverter based on the voltage command value for each of the multiphase windings. The controller adds, to the voltage command value for the q-axis, a first compensation voltage value for compensating torque ripples to thereby output a compensated voltage command value for the q-axis. The first compensation voltage value contains m-th harmonic components in the AC motor and varies depending on the rotational angle of the rotor, the m corresponding to the number of phase of the multiphase windings. The controller uses, as the voltage command value for the q-axis, the compensated voltage command value for the q-axis. | 2010-12-23 |
20100320946 | BRUSHLESS DC MOTOR DRIVER - A brushless DC motor driver has a DC-AC converter circuit, a detection circuit, a comparison circuit and a control circuit. The DC-AC converter circuit has switching elements. The detection circuit is configured to detect an electric current flowing through a motor coil of a brushless DC motor. The comparison circuit is configured to, if the electric current reaches or exceeds an over-current threshold, generate an over-current detection signal. The control circuit is configured to unenergize the switching elements for a first breaking time if the detection circuit generates the over-current detection signal in a start phase. The control circuit is also configured to unenergize the switching elements for a second breaking time longer than the first breaking time if the detection circuit generates the over-current detection signal in a steady phase. | 2010-12-23 |
20100320947 | Method For Calibrating A Motor Control Circuit To Improve Temperature Measurement In A Electrical Motor - A method enables measurement of an inverter loss within a motor control circuit for an appliance. The method includes applying a constant DC current generated from a first AC supply voltage to a motor winding through an inverter at a first duty cycle, measuring a first voltage corresponding to the current through the motor at a motor current sense resistor, computing a first ratio of the first measured voltage at the motor current sense resistor to a first DC input voltage corresponding to the first AC supply voltage, identifying a second duty cycle from the first computed ratio, comparing the second duty cycle to the first duty cycle, and identifying a first inverter loss factor from the difference between the first duty cycle and the second duty cycle. | 2010-12-23 |
20100320948 | Method and Apparatus for Increased Current Stability in a PWM Drive - The present invention provides an improved current regulator for PWM based drives for electric motors. The invention provides compensation for the rotor position signal for delays introduced due to the PWM algorithm and for digital sampling present in such a drive. Current regulator commonly operate in a two-phase reference frame, requiring forward and reverse coordinate transformations between the physical current values and the two-phase reference frame variables. The present invention provides an improved compensation in the forward transformation by determining the phase lag between the commanded voltage reference and the output voltage reference and by further compensating the forward transformation for errors introduced due to sampling the current either at different sampling instances than the rotor position or at multiple sampling instances during a carrier period. Additionally, compensation during the reverse transformation is provided to compensate for errors introduced due to sampling the current and rotor position. | 2010-12-23 |
20100320949 | Multi Output Inverter - The present invention relates to a multi output inverter that is adapted to supply mains powered appliances ( | 2010-12-23 |
20100320950 | INVERTER DEVICE - In a 2-shunt system, accurate sensorless vector control can be realized without increasing shunt resistors. There is disclosed an inverter device including an inverter main circuit obtained by connecting, in a three-phase bridge-like manner, three arms formed by coupling, in series with a direct-current power source, two switching elements which perform mutually opposite on/off operations, to apply three-phase pseudo alternating-current voltages of a three-phase PWM system to an electric motor; shunt resistors connected to the direct-current power source in series with at least two of the three arms of the inverter main circuit; and a controller for detecting currents flowing through the shunt resistors in a predetermined cycle to control the on/off operations of the switching elements of the inverter main circuit based on the detected currents. The controller converts, into the current value of a specific angle range, a current value detected at a time before approximately 180° corresponding to the specific angle range where the on-time of the switching elements is continuously not more than a predetermined value, and then uses the converted current value. | 2010-12-23 |
20100320951 | INVERTER DEVICE, ELECTRIC AUTOMOBILE IN WHICH THE INVERTER DEVICE IS MOUNTED, AND HYBRID AUTOMOBILE IN WHICH THE INVERTER DEVICE IS MOUNTED - A torque limit section that applies limit to a torque instruction value of an electric motor such that a switching elements temperature is restricted to no more than an element upper limiting temperature includes a torque restriction section that finds a torque restriction value for restricting the torque of the electric motor in accordance with the said switching elements temperature; a torque restriction mitigation section that finds a torque restriction mitigation value for mitigating the torque limit value in accordance with the integrated value of the deviation of the element upper limiting temperature and the switching elements temperature; a first subtractor that finds a torque restriction value by subtracting the torque restriction mitigation value from the torque limit value; and a second subtractor that finds a limited torque instruction value obtained by subtracting the torque limit value from the torque instruction value and outputs this to the gate generating section. | 2010-12-23 |
20100320952 | OVERLOAD PROTECTION DEVICE FOR MOTOR - An overload protection device includes a motor, a transmitting shaft, a driving wheel, a resilient member, a sensor and a controller. The transmitting shaft including driving arm is meshed with the motor. The driving wheel is rotably engaged with the transmitting shaft at a distal end. The resilient member is connected to the driving arm at one end, and connected to the driving wheel at another end for driving the driving wheel to rotate. The sensor is mounted on the driving wheel and covered by the driving arm, and configured for and outputting a signal when the transmitting shaft is rotated relative to driving wheel. The controller is installed in the transmitting shaft and electrically coupled with the sensor for receiving the signal outputted from the sensor and shutting down the motor correspondingly. | 2010-12-23 |
20100320953 | METHODS AND SYSTEMS FOR DIAGNOSING STATOR WINDINGS IN AN ELECTRIC MOTOR - Systems and methods are provided for diagnosing stator windings in an electric motor operating under control of a current-regulating control loop. The current-regulating control loop is configured to provide a command voltage to the electric motor. The command voltage comprises a current-regulated voltage based on a difference between a commanded current and a measured current through the stator windings. The method comprises determining a negative sequence component of the command voltage, and identifying a fault condition when a characteristic of the negative sequence component is greater than a threshold value. | 2010-12-23 |
20100320954 | ROTATIONAL VELOCITY MEASUREMENT OF A ROTOR - A system is provided for measuring the rotational velocity of the rotor of an electric motor or generator having (i) a stator with a plurality of circumferentially spaced pole pieces, each pole piece having a corresponding armature winding, and (ii) a rotor with a plurality of circumferentially spaced magnet portions, the armature windings interacting with the magnetic field produced by the magnet portions. The system includes one or more voltage sensing coils. The or each voltage sensing coil is adapted to encircle a respective pole piece of the stator such that a time-varying electromotive force is induced in the voltage sensing coil as the magnet portions of the rotor pass by the pole piece. The system further includes is a detector for detecting the time-varying electromotive force induced in the or each voltage sensing coil, and determining the rotational velocity of the rotor from the time between peaks in the induced electromotive force. | 2010-12-23 |
20100320955 | MOTOR DRIVE DEVICE AND ELECTRONIC DEVICE THAT USES THE SAME - In the motor drive device ( | 2010-12-23 |
20100320956 | Energy Saving System and Method for Devices with Rotating or Reciprocating Masses - A system and method are provided for reducing the energy consumed by a pump jack electric motor by reducing the supply voltage to the motor when the motor would be generating energy in open loop mode. By substantially eliminating the energy generation mode, the braking action of the utility grid in limiting the acceleration of the motor and system that would otherwise occur is substantially removed. The motor and system will speed up, allowing the natural kinetic energy of the cyclic motion to perform part of the pumping action. A closed loop controller in electrical connection with the motor computes the necessary information from the observed phase angle between the voltage and current supplied to the motor. By reducing the supply voltage to the motor, the observed phase angle may be reduced to a target phase angle value. By allowing some current flow, primarily of a reactive nature, an observable feedback parameter may be used in the closed loop control system as an indication of the load condition, to which the closed loop motor controller may react, supplying power when needed, such as in the energy consumption mode. The electric motor may be effectively turned off, but without completely cutting the power to the motor. During both the energy consumption mode and the period that open loop energy generation would be occurring, the closed loop motor controller may reduce the observed phase angle to a target phase angle by reducing the supply voltage. Any further reduction in the observed phase angle below the target phase angle may be interpreted as an increase in motor load, to which the motor controller may respond by increasing the supply voltage to the motor until the target phase angle is once again reached. | 2010-12-23 |
20100320957 | Method and device for charging rechargeable batteries - Rechargeable batteries are used as a power supply in the most varied electrical devices. Parallel to this, connections with other energy sources are frequently available, at least for part of the time, in order to charge the rechargeable batteries during this time. Particularly efficient lithium ion batteries have the problem that short charging/discharging cycles cause them to age just as much as long cycles, during which the user can derive greater benefit from them. It is the task of the invention to ensure particularly effective use of rechargeable batteries during charging/discharging cycles of the most varied duration. This is achieved in that the rechargeable battery is divided into cells, of which only one is charged, in each instance, and the others stand ready to provide energy. If the network voltage stops, charging of the cell just being charged is completed from the other cells. | 2010-12-23 |
20100320958 | Photovoltaic shell for rechargeable batteries - Photovoltaic shell for charging a rechargeable battery. Photovoltaic shell includes flexible photovoltaic cells wrapped around a rechargeable battery cell. Positive terminal of photovoltaic cells are connected to positive terminal of rechargeable battery cell, and negative terminal of photovoltaic cells are connected to negative terminal of rechargeable battery cell, to provide charge while exposed to light. | 2010-12-23 |
20100320959 | EXPANDED RANGE ELECTRIC VEHICLE WITH OFF-GRID BATTERY CHARGER - A low speed electric vehicle (LSV) with an off-grid battery charger to extend the range of the vehicle including an internal combustion battery charging generator carried in the trunk space of the vehicle and an optional solar panel mounted on the roof of the vehicle. The internal combustion battery charging generator is distinguished from a conventional hybrid vehicle engine in that the battery charging generator is not mechanically connected to the vehicle drive train, but is instead only electrically connected to the traction battery as a battery charger. The internal combustion battery charging generator is provides sufficient battery charging energy to keep the batteries functionally charged during normal vehicle operation so that contents of a full gas tank and a fully charged battery bank can be consumed during continuous operation of the vehicle. | 2010-12-23 |
20100320960 | FUEL CELL SYSTEM AND CONTROL METHOD THEREOF - The present invention provides a fuel cell system including a fuel cell configured to cause reactant gas to be electrochemically reacted to generate electrical power when the reactant gas is supplied to the fuel cell, power consuming equipment such as a reactant gas supply apparatus and a heating device operable to consume electrical power generated by the fuel cell, and a controller for controlling operation of the fuel cell system. During a warm-up operation, the controller causes the reactant gas supply apparatus to start a flow of the reactant gas and to increase the flow of the reactant gas over time, such that the reactant gas supply device starts to consume power and consumes increased power over time. After starting the flow of the reactant gas, the controller causes the heating device to start heating the coolant such that the heating device consumes power. | 2010-12-23 |
20100320961 | Transport and/or storage container for rechargeable wireless earphones - The invention concerns a transport and/or storage container with integrated charging function ( | 2010-12-23 |
20100320962 | INFORMATION PROCESSING APPARATUS, PROGRAM, AND INFORMATION PROCESSING SYSTEM - An information processing apparatus includes an antenna having a variable Q value, the antenna being used for performing communication with an external apparatus in a noncontact manner by using a carrier of a predetermined frequency and charging a battery in a noncontact manner by using the carrier, an obtaining unit configured to obtain information about charging of the battery, a determining unit configured to determine whether charging of the battery is to be performed or not on the basis of the information obtained by the obtaining unit, and a setting unit configured to selectively set the Q value of the antenna to a first value or a second value in accordance with a determination result generated by the determining unit, the second value being larger than the first value. | 2010-12-23 |
20100320963 | CONTACT-LESS POWER TRANSFER - There is disclosed a system and method for transferring power without requiring direct electrical conductive contacts. There is provided a primary unit having a power supply and a substantially laminar charging surface having at least one conductor that generates an electromagnetic field when a current flows therethrough and having an charging area defined within a perimeter of the surface, the at least one conductor being arranged such that electromagnetic field lines generated by the at least one conductor are substantially parallel to the plane of the surface or at least subtend an angle of 45° or less to the surface within the charging area; and at least one secondary device including at least one conductor that may be wound about a core. Because the electromagnetic field is spread over the charging area and is generally parallel or near-parallel thereto, coupling with flat secondary devices such as mobile telephones and the like is significantly improved in various orientations thereof. | 2010-12-23 |
20100320964 | Method And System To Charge Batteries Only While Vehicle Is Parked - Electric vehicles and plug-in hybrid electric vehicle derive all, or at least some, of their power from the electrical grid. The vehicle is provided with a receptacle into which a 110 Volt AC power cord can be plugged. According to the present disclosure, coupling of the external power supply and/or charging are prevented when the vehicle is not in a parked condition. The parked condition is based on the application of a vehicle parking brake and/or a gear shift selector being in a parked position. If a parked condition is not detected, one of the following measures is taken: a relay in the battery charger on board the vehicle is opened thereby disallowing charging; an access door to the receptacle is locked by an access door solenoid; and a plug ejector prevents insertion of a plug into the receptacle. | 2010-12-23 |
20100320965 | APPARATUS FOR PULSE CHARGING ELECTRIC VEHICLES - Disclosed is a method and apparatus for charging electrically powered devices. In accordance with the invention, the device is powered by two storage devices. One storage device is capable of receiving a substantial charge very rapidly while the other storage device requires a longer time to receive a charge. The advantage is that the powered device can be used almost instantly and continually while at the same time rebuilding electrical charge. | 2010-12-23 |
20100320966 | Vehicle Charging Station Having a Dual Position Locking Door - A vehicle charging station that includes a power receptacle compartment that includes a power receptacle to receive an electrical plug. The vehicle charging station also includes a door that is hingedly coupled with the power receptacle compartment to cover the power receptacle when the door is closed. The vehicle charging station includes a first locking means for locking and unlocking the door from a closed position without consuming power to control access to the power receptacle compartment such that the door remains locked in the closed position if the vehicle charging station loses power. The vehicle charging station also includes a second locking means for locking and unlocking the door from a charging position to control access to the electrical plug. The second locking means allows the door to be unlocked from the charging position if the vehicle charging station loses power. | 2010-12-23 |
20100320967 | Rechargeable Battery Pack with Connecting Ports for Internal and External Charging/Output Operations - The embodiments relate to a rechargeable battery pack capable of both internal and external charging/output operation. The rechargeable battery pack has an internal connecting port, which is configured to directly connect to an internal electrical contact in an electronic device during an internal charging/output operation when such battery pack is installed inside an electronic device. The rechargeable battery pack also has at least one external connecting port, which is operable during at least one of external charging and output operations of the rechargeable battery pack when the battery pack is removed from the electronic device. The external connecting port allows the rechargeable battery pack to be externally connected to an external charging connecter during an external charging operation or to a second electronic device or second rechargeable battery pack during an external output operation. | 2010-12-23 |
20100320968 | ELECTRONIC APPARATUS WITH A FUNCTION FOR CHARGING FOR ITSELF - An electronic apparatus with a function for charging for itself is provided. The apparatus comprises a base part and a cover part, the cover part is connected to the base part through a slide mechanism and the cover part can slide along the base part through the slide mechanism. The electronic apparatus further comprises an electromagnetic induction device. The electromagnetic induction device comprises a conductor group and a first magnetic object group. During the process of the cover part sliding along the base part, the conductor group and a magnetic field make relative movement to generate induced current. After converted to direct current (DC) by a rectifier, the induced current is input to a battery of the apparatus to charge for the battery. | 2010-12-23 |
20100320969 | Battery pack - A battery pack is provided with a plurality of battery modules; a pack main body that removably receives the plurality of battery modules; a movable member that prohibits the plurality of battery modules from being attached to and removed from the pack main body at a first position; at least one sensor that detects whether the movable member is located at the first position or not; and a controller that performs at least one predetermined processing based on detection by the at least one sensor. | 2010-12-23 |
20100320970 | PASSIVE BATTERY DISCHARGE DEVICE - A passive battery discharge apparatus located within a cap. The cap extends over battery contacts to be discharged. The discharge apparatus includes a conductive material with specified volumetric resistivity properties that is formed into a pad. The cap is positioned over the contacts so that the pad touches and spans between the contacts to be discharged. A spring insures good contact between the pad and the battery contacts. A metal heat sink provides added thermal control. The discharge apparatus provides an economical solution to safely transport batteries that are beyond their useful service life by avoiding circuit components in favor of conductive elastomers or conductive foams. | 2010-12-23 |
20100320971 | Portable charging power system for battery-powered devices - A portable power system which contains a battery, which is intended for use as a power source for charging the batteries of portable electronics devices or for powering other electrical systems. It contains a USB connection for power input and a myriad of adapters for connecting the power system with the proprietary connectors of portable devices, as well as a screen to output system information to the user. The power system also contains a microcontroller which controls internal systems, input and output current and voltage, such that the power system may operate with any portable device as well as any type of USB port. | 2010-12-23 |
20100320972 | POSITIVE ELECTRODE MATERIAL FOR LITHIUM-ION ACCUMULATOR - A composition comprising:
| 2010-12-23 |
20100320973 | CHARGE CONTROL CIRCUIT - When a control circuit detects from a signal CPO | 2010-12-23 |
20100320974 | ADJUSTABLE CURRENT LIMIT SWITCHING REGULATOR WITH CONSTANT LOOP GAIN - A switching regulator is configured to provide a regulated voltage to a load while maintaining a substantially maximum output current limit, the switching regulator having a loop gain. In accordance with one aspect the switching regulator comprises: a circuit for adjusting the maximum output current limit in response to a programmable signal independently of the loop gain. In accordance with another aspect, the switching regulator comprises: a resistance sensing element for providing the current output of the regulator, and having a resistance which varies with temperature; and a circuit for maintaining the output current limit at a level independent of the temperature of the sensing element. In addition, in accordance with one aspect, a method of providing a regulated voltage to a load is disclosed in which a substantially maximum output current limit of a switching regulator is maintained. In one aspect the method comprises: adjusting the maximum output current limit in response to a programmable signal independently of the loop gain. In accordance with a second aspect, the method comprises: maintaining the output current limit at a level independent of the temperature of the sensing element and a constant transient response to load perturbations as a function of temperature and current limit setting. | 2010-12-23 |
20100320975 | QUASI-CONTINUOUS VOLTAGE REGULATOR WITH DUAL POLARITY OUTPUTS - A controller includes a hysteretic circuit that provides a first ON level pulse when a corresponding first negative regulated voltage rises above a respective first voltage threshold. Similarly, a second ON level pulse is provided when a corresponding second positive regulated voltage falls below a respective second voltage threshold. The hysteretic circuit provides an OFF level pulse when one of first and second switch currents increases above a current threshold. A switch control circuit receives the first and second ON level pulses and the OFF level pulse, and provides first and second switch control outputs to separately regulate the first and second regulated voltages. | 2010-12-23 |
20100320976 | DC-DC CONVERTERS HAVING IMPROVED CURRENT SENSING AND RELATED METHODS - A DC-DC converter includes a chip including an error amplifier and a pulse width modulator (PWM) having an input connected to an output of the error amplifier, and an inductor driven by said PWM in series with an output node (V | 2010-12-23 |
20100320977 | PULSE ADDING SCHEME FOR SMOOTH PHASE DROPPING AT LIGHT LOAD CONDITIONS FOR MULTIPHASE VOLTAGE REGULATORS - A pulse control system for a multiphase regulator including an error amplifier, a multiphase generator, and an adaptive controller. The error amplifier provides an error signal indicative of output voltage error. The multiphase generator develops modulation pulses for phases based on the error signal. The adaptive controller is responsive to a load indication signal and redirects at least one modulation pulse from a first of phase to a second phase. The load indication signal may be received from a microprocessor indicating a low power mode. The adaptive controller provides a smooth and efficient transition to low load conditions by dropping operation of one or more phases and redirecting modulation pulses to the remaining one or more phases, and reduced phases improve power efficiency for the low load conditions. | 2010-12-23 |
20100320978 | SYSTEM, METHOD AND APPARATUS FOR CONTROLLING CONVERTERS USING INPUT-OUTPUT LINEARIZATION - A system, method and apparatus for controlling boost and buck-boost converters using input-output linearization and leading-edge modulation is provided. The controller includes a summing circuit connected to the converter to create a third voltage representing a difference between the first voltage and the second voltage. A gain circuit is connected to the summing circuit to adjust the third voltage by an appropriate gain. A modulating circuit is connected to the gain circuit, the converter, the first voltage, the second voltage and the second current to create a control signal based on the first voltage, the second voltage, the adjusted third voltage, the fourth voltage and the first current. The control signal is used to control the converter. Typically, the first voltage is a converter output voltage, the second voltage is a reference voltage, the fourth voltage is a converter input voltage, and first current is a converter inductor current. | 2010-12-23 |
20100320979 | CURRENT CONTROL SYSTEMS WITH CURRENT FEEDBACKS - A current control system includes a first switch, a second switch, and a controller. The second switch is coupled in parallel with the first switch and operable for providing a feedback signal indicative of a current flowing through the first switch. The feedback signal is determined by a width-to-length ratio of the first switch and a width-to-length ratio of the second switch. In addition, the controller is coupled to the first and second switches and operable for adjusting the current according to the feedback signal. | 2010-12-23 |
20100320980 | OUTPUT DEVICE - An output device includes an output transistor that outputs an output current, a first driver that drives the output transistor so that a feedback voltage of an output voltage of the output transistor is in agreement with a reference voltage, an RC circuit that has a capacitor connected to the ground and a resistor connected in series to the capacitor, and a second driver that drives the output transistor to increase the output current when a potential difference between ends of the resistor, generated by the feedback voltage supplied between ends of the RC circuit, is increased by a decrease of the output voltage. | 2010-12-23 |
20100320981 | POWER CONTROL CIRCUIT, POWER SUPPLY DEVICE, AND ELECTRONIC DEVICE - A power control circuit includes a control circuit configured to perform a soft start operation before a power supply device performs a normal operation. The power control circuit also includes a counter circuit configured to divide a switching frequency of the power supply device in the normal operation, wherein the counter circuit measures a period of the soft start operation and when the period lasts for a set length, starts to divide the switching frequency, and wherein the power control circuit causes a comparator comprising the counter circuit to compare the frequency obtained by dividing the switching frequency with a reference frequency and corrects the switching frequency. | 2010-12-23 |
20100320982 | COMBINED TYPE TRANSFORMER AND BUCK-BOOST CIRCUIT USING THE SAME - Combined type transformer includes: a transformer core; first and second coils provided with respect to the transformer core; first and second inductor cores provided around the first coil; and third and fourth inductor cores provided around the second coil. The transformer core and the first and second coils constitute a transformer, the first coil and the first and second inductor cores constitute a first inductor, and the second coil and the third and fourth inductor cores constitute a second inductor. | 2010-12-23 |
20100320983 | SYSTEM AND METHOD FOR PFM/PWM MODE TRANSITION WITHIN A MULTI-PHASE BUCK CONVERTER - A multi-phase voltage regulator comprises a plurality of DC/DC voltage regulators. Each of the DC/DC voltage regulators is associated with a particular phase of the multi-phase regulator. Each of the regulators comprises a first switching transistor connected between an input voltage node and a phase node responsive to switching control signals. A second switching transistor is connected between the phase node and a ground node and is responsive to the switching control signals. An inductor is connected between the phase node and an output voltage node. Control logic generates the switching control signals responsive to a pulse control signal. PFM/PWM transition logic generates the pulse control signal. The pulse control signal transitions between a PWM signal and a PFM signal responsive to an error voltage, a feedback voltage from the output voltage node and an inductor current through the inductor. An error amplifier generates the error voltage responsive to the feedback voltage and a reference voltage. The output of each error amplifier in each of the plurality of phases are connected to each other. A capacitor is connected between the output voltage node and a ground node. | 2010-12-23 |
20100320984 | APPARATUS INCLUDING POWER SUPPLY CIRCUIT - An apparatus which has a load that consumes a predetermined amount of electric power per unit time includes a power source circuit configured to generate a voltage for driving the load, a capacitor which is connected to a supply line for supplying electric power to the load from the power source circuit and configured to stabilize a potential of the load, a first supply circuit which can supply electric power smaller than the predetermined amount to the capacitor and can discharge a charge from the capacitor, a second supply circuit which can supply electric power larger than the predetermined amount to the capacitor, a switch circuit configured to operate each of the first supply circuit and the second supply circuit, and a holding circuit configured to hold information based on the operation of the first supply circuit. | 2010-12-23 |
20100320985 | DRIVER CIRCUIT - A drive control signal is effectively obtained. An offset control circuit ( | 2010-12-23 |
20100320986 | SWITCHING CONVERTERS WITH EFFICIENTLY-CONTROLLED MODE TRANSITIONS - Efficiently controlled converter system embodiments are provided to operate in different operational modes. In a first operational PWM mode, first and second transistors are switched with a feedback-controlled duty cycle to thereby realize an inductor current that maintains a system output voltage. In a second operational PFM mode, after the output voltage decays to a lower threshold over a decay time, the control and synchronous transistors are driven a sufficient number of times to raise the output voltage to an upper threshold. The systems are controlled to efficiently transition between the first and second operational modes. For example, a converter system preferably transitions to the second PFM operational mode when current peaks of the inductor current drop below a predetermined current threshold and the system preferably transitions to the first PWM operational mode when the output voltage drops to a predetermined reference voltage. | 2010-12-23 |
20100320987 | QUASI-CONTINUOUS VOLTAGE REGULATOR AND CONTROLLER - A controller for a voltage regulator includes a hysteretic circuit that generates a hysteretic voltage output as a function of a regulated voltage and that generates a hysteretic current output as a function of an inductor current. A switch control circuit provides a quasi-continuous control output as a function of the hysteretic current output from a start time when the regulated voltage rises above a higher hysteretic voltage until a stop time when the regulated voltage falls below a lower hysteretic voltage. | 2010-12-23 |
20100320988 | INTERNAL VOLTAGE SUPPLYING DEVICE - An internal voltage supplying device. A reference voltage generator generates a first feedback voltage having a predetermined voltage ratio with respect to a core voltage. An adjusting mechanism adjusts the voltage ratio, and a voltage generator supplies a high voltage having a level higher than a level of the core voltage by the level of a threshold voltage or higher and maintains the level of the high voltage in accordance with the first feedback voltage. | 2010-12-23 |
20100320989 | PROTECTION APPARATUS AND METHOD FOR AN ISOLATED TYPE POWER SUPPLY - An isolated type power supply includes a transformer, and a power switch and a current sense resistor serially connected to a primary coil of the transformer, and a protection apparatus and method monitor a control signal which is used to switch the power switch in normal operation, and trigger a signal to stop the power from switching when the control signal becomes greater than a threshold. This protection apparatus and method can more quickly detect short circuit of the current sense resistor, and prevent the isolated type power supply from overcurrent impact. | 2010-12-23 |
20100320990 | Low Heat Dissipation I/O Module Using Direct Drive Buck Converter - A current-loop output circuit for an industrial controller provides for low power dissipation and reduced part count by driving current loads of different resistances directly from a switched voltage source. Proper filtering and design of a feedback loop allows the necessary transient response times to be obtained. | 2010-12-23 |
20100320991 | DC/DC CONVERTER AND DC/DC CONVERTER CONTROL METHOD - A DC/DC converter includes a first comparator configured to compare an output voltage to a reference voltage; a pulse generator circuit configured to generate a pulse signal when triggered by an output signal from the first comparator; a first switch circuit configured to open and close on the basis of the pulse signal; an output voltage generator configured to generate the output voltage on the basis of an input voltage supplied via the first switch circuit; a delay generator circuit configured to delay the output signal from the first comparator before outputting; and an error amplifier configured to control a delay time of the delay generator circuit on the basis of a potential difference between the output voltage and the reference voltage. | 2010-12-23 |
20100320992 | Buck-Boost Converter With Sample And Hold Circuit In Current Loop - In an average-current mode control type buck-boost PWM converter, a sample and hold circuit is inserted in the current loop to avoid problems associated with ripple of the average inductor current demand signal. The rippling average inductor current is generated by a differential transconductance amplifier having applied to its inputs an error signal and a signal corresponding to the instantaneous current through the inductor, where the output of the amplifier is filtered. The rippling average inductor current is sampled and held at the beginning of each switching cycle, prior to the average inductor current demand signal being compared to buck and boost sawtooth waveforms. By using the sample and hold circuit, the feedback loops are easier to stabilize, and the converter cannot switch modes during a switching cycle. | 2010-12-23 |
20100320993 | CONSTANT VOLTAGE CIRCUIT - A disclosed constant voltage circuit is configured to become active or inactive and convert an input voltage applied to an input terminal into a predetermined constant voltage for output from an output terminal. The circuit includes an output transistor for supplying, from the input terminal to the output terminal, an output current, an error amplifier circuit unit for controlling operations of the output transistor to make a first proportional voltage, which is proportional to the output voltage from the output terminal, equal to a predetermined reference voltage, a ramp voltage generating circuit unit for generating and outputting a ramp voltage whose voltage level increases at a predetermined speed from start-up, and an amplifier circuit unit for amplifying the voltage difference between the ramp voltage and a second proportional voltage, which is proportional to the output voltage, and outputting the amplified voltage difference to a control electrode of the output transistor. | 2010-12-23 |
20100320994 | MULTI-PARALLEL MAGNETIC-FIELD CANCELLATION TYPE TRANSFORMER - A multi-parallel magnetic-filed cancellation type transformer includes a plurality of coils which generate magnetic flux during energization and a core having a plurality of magnetic leg portions on which the coils are wound, and bases for fixing the magnetic leg portions. The plurality of coils are wound on the magnetic leg portions in such a manner that the magnetic flux generated from the coils are formed in the directions opposite to each other. A plurality of closed magnetic circuits of the magnetic flux are formed at the magnetic leg portions and the bases. The magnetic resistance of the closed magnetic circuits is homogeneous. Accordingly, the transformer can reduce the size thereof, and prevent the deterioration of electric power conversion efficiency. | 2010-12-23 |
20100320995 | ATOM CHIP DEVICE - Ultra-cold (nano-Kelvin) neutral atoms can be trapped, manipulated, and measured, using integrated current carrying micro-structures on a nearby surface (Atom Chips). This can be utilized for the realization of ultra-sensitive sensors and quantum computation devices based on the quantum mechanical properties of the trapped atoms. However, harmful processes arise from the interactions between the atoms and the nearby surface. According to the present invention these harmful processes can be highly suppressed by using electrically anisotropic materials. It is shown that time-independent trapping potential corrugation leading to fragmentation of the trapped atom cloud can be suppressed, and that time dependent noise processes arising from the coupling of atoms to the nearby surface, and leading to loss of atoms from the trap, heating and loss of coherence can be significantly reduced. | 2010-12-23 |
20100320996 | DEVICE AND METHOD FOR DETERMINING AT LEAST ONE VALUE ASSOCIATED WITH THE ELECTROMAGNETIC RADIATION OF AN OBJECT BEING TESTED - The invention relates to a device ( | 2010-12-23 |
20100320997 | METHOD AND CIRCUIT FOR MEASURING QUIESCENT CURRENT - A measurement circuit and method for measuring a quiescent current of a circuit under test are provided. The measurement circuit comprises: a comparator having a first input terminal for receiving a reference voltage, a second input terminal coupled to the circuit under test, and an output terminal; a current source having a first terminal coupled to a first power supply voltage terminal, and a second terminal for providing a current to the circuit under test; a first switch having a first terminal coupled to the second terminal of the current source, a second terminal coupled to the circuit under test, and a control terminal coupled to the output terminal of the comparator; and a first counter having a first input terminal coupled to the output terminal of the comparator, a second input terminal for receiving a clock signal, and an output terminal for providing a first counter value associated with the quiescent current. | 2010-12-23 |