42nd week of 2008 patent applcation highlights part 17 |
Patent application number | Title | Published |
20080252142 | Apparatus for Electrical Power Transmission - A device for electrical energy transmission includes one or more current converters. Each current converter has phase elements with at least one series connection of circuit elements each with at least two power semiconductors and at least two free-wheeling diodes that are connected in parallel thereto, and energy storing means. The transfer properties in or between power distribution networks are improved with the novel device. The phase elements have at least two parallel branches that are connected in parallel with each other and each having with a series connection of circuit elements. | 2008-10-16 |
20080252143 | Method and Device For Injecting Reactive Current During a Mains Supply Voltage Dip - The invention relates to a method and device for injecting current during a mains supply voltage dip. The inventive method consists in permanently monitoring the magnitude and phase of the mains supply voltage and, upon detection of a voltage dip, injecting reactive current in the affected main supply phase(s) in a manner that can vary over the duration of the voltage dip, at very short intervals, proportionally to the magnitude of the dip, thereby absorbing the necessary active current. The device comprises a voltage measurement switch, a transformer (low voltage/medium voltage), a DC/AC inverter, a capacitor, a voltage dip detection circuit, and a control circuit. | 2008-10-16 |
20080252144 | UNINTERRUPTIBLE POWER SUPPLY AND METHOD FOR CONTROLLING SAME - An uninterruptible power supply and method for controlling same are disclosed. The controlling method includes the steps of bypassing the first AC power to the output terminal via the bypass loop and the switch and converting a second AC power having a voltage, phase and frequency substantially equal to that of the first AC power by an inverter when the first AC power is normal; and switching the second AC power to the output terminal via the switch when the phase or frequency of the first AC power is changed so as to generate a difference value between the first AC power and the second AC power and the difference value is larger than a predetermined difference value. | 2008-10-16 |
20080252145 | DC/DC POWER CONVERSION DEVICE - A DC/DC power conversion device includes n-stage circuits comprised of an inverter circuit for driving which is connected between positive terminals and negative terminals of smoothing capacitors, and a rectifier circuit which is connected between positive terminals and negative terminals of smoothing capacitors; a first circuit corresponding to at least one among the n-stage circuits and configured by connecting in parallel cell circuits of m, second circuits corresponding to a plurality of remaining circuits of (n−1) among the n-stage circuits; capacitors for energy transfer connected between middle points of the cell circuits and middle points of the second circuits; and column circuits of m comprised of the cell circuits, the second circuits and the capacitors for energy transfer, wherein the middle points are contact points of high voltage sided elements and low voltage sided elements of the cell circuits and the second circuits; and driving signals for driving the respective column circuits have the same driving cycle and are out of phase with each other. | 2008-10-16 |
20080252146 | CONTROLLABLE POWER SUPPLY DEVICE WITH STEP-UP FUNCTION - A controllable power supply device with a step-up function including a constant voltage generator, a programmable voltage generator, a first switch and a linear regulator is provided. The constant voltage generator is used to provide an initial voltage. The programmable voltage generator is used to receive the initial voltage and adjust the received initial voltage to boost the initial voltage to a power supply voltage. The first connecting terminal of the first switch is used to receive the initial voltage, the second connecting terminal of the first switch is used to receive the power supply voltage, and the third connecting terminal of the first switch is coupled to one of the first connecting terminal and the second connecting terminal. Therefore, the voltage from the third connecting terminal of the first switch is stabilized and is outputted as the output voltage of the controllable power supply device by the linear regulator. | 2008-10-16 |
20080252147 | Modular multiple-circuit electrical system - A multiple circuit duplex module comprising a chassis having an electrical chassis receptacle providing a plurality of connection points for the selection of power from two or more different circuits; a duplex element having at least one electrical duplex receptacle thereon to deliver power from one of the two or more different circuits to an external device in electrical contact with the at least one duplex receptacle; first conductor means for electrically connecting the at least one duplex receptacle to selected connection points in the chassis receptacle; wherein the duplex element is connectable to the chassis in different orientations, the orientation of the duplex element determining which one of the two or more different circuits is electrically connected to the at least one duplex receptacle. | 2008-10-16 |
20080252148 | SEPARATED BATTERY AND VEHICLE VOLTAGES - A power distribution system and method of operation, for a motor vehicle. The power distribution system includes a generator is in a parallel electrical connection with a battery and a switch. The generator is also in communication with a vehicle load circuit, while the battery is in selective communication with the generator based on the state of the switch. The switch disconnects the battery from the vehicle load circuits to isolate the battery from the vehicle load circuit and the generator output voltage, and allowing the generator to run at a voltage below the nominal battery voltage. The method includes the steps of disconnecting the battery from the generator and vehicle load, lowering the generator output voltage from the generator, and providing the generator output voltage to the vehicle circuit. | 2008-10-16 |
20080252149 | AC/DC converter having single detectable input - An AC/DC input power converter including only a single input cable such that a user will never have to switch cabling, regardless if the cable is connected to an AC voltage source or a DC voltage source. | 2008-10-16 |
20080252150 | Linear Actuator in an Electric Percussion Tool - A linear actuator in an electric percussion tool is equipped with a rotor and a stator, wherein the rotor has at least two stacks, which are arranged at a predetermined distance from one another, of superposed permanently magnetic bars, the stator is formed, at least partially, from a soft-magnetic material and has at least two pairs of teeth with mutually opposed teeth, of which each pair of teeth receives one of the two stacks between them, in each case, while forming an air gap, and wherein the stator has at least two magnetically conductive inner regions which are located between the two stacks, are arranged at a predetermined distance from one another in the direction of movement of the rotor and are at least partially surrounded, in each case, by an essentially hollow-cylindrical coil arrangement, the central longitudinal axis of which is oriented approximately transversely to the direction of movement of the rotor, and the rotor has a driving element which is able to transmit a mechanical impulse to a tool belonging to the electric percussion tool. | 2008-10-16 |
20080252151 | TWO DEGREE OF FREEDOM MOVERS WITH OVERLAPPING COILS | 2008-10-16 |
20080252152 | Electrical Machine with an Insertion Device for a Permanent Magnet Between Pole Tooth Halves and Corresponding Production Method - The manufacturing effort for producing electrical machines with pole teeth which are fitted with permanent magnets is intended to be simplified. The permanent magnets are inserted into the pole teeth only at the end of the manufacturing process, for this purpose, with the pole teeth each comprising two pole teeth halves ( | 2008-10-16 |
20080252153 | Electric Linear Drive Unit - The invention proposes an electric linear drive unit with an electric linear motor that is arranged in or on a basic housing. A sensor device arranged in or on the basic housing serves for determining at least one position of a driving element that is driven by the linear motor. Electric lines are routed from a coil system of the linear motor and from the sensor device to a common connecting point on the basic housing through at least one duct that extends within the basic housing, wherein said electric lines extend through the connecting point to a connector that is arranged at the connecting point and contains connecting means for producing a connection with external lines or cables. The connecting point is sealed by means of an insulating casting- or injection-molding compound at least in the region in which the lines extend from the connecting point. | 2008-10-16 |
20080252154 | Motor having improved mounting structure - A motor having an improved mounting structure is composed of a rotor including a rotor yoke; a stator including a bearing, a bearing holder and a base plate fixed to one end portion of the bearing holder; a shaft fixed to the rotor yoke and a damping member interposed between the bearing holder and the base plate. The bearing is fixed to the bearing holder. The rotor is supported through the shaft so as to be rotatable freely with respect to the stator. The bearing holder is fixed to the base plate with having a first area in which the bearing holder directly contacts with the base plate and a second area in which the damping member is interposed between the bearing holder and the base plate. | 2008-10-16 |
20080252155 | SPRAY COOLED V-WEDGE FOR AEROSPACE GENERATOR - A high speed generator cooling system directs a cooling oil spray through a chamber inside a coil support wedge assembly, which may be disposed adjacent to the generator coils. Heat from the generator coils may be conducted through the walls of the coil support wedge assembly and into the chamber where it is removed by the cooling oil spray passing through the chamber. The cooling oil passes through a generator rotor shaft and into a cooling passage in least one of the rotor laminations. | 2008-10-16 |
20080252156 | ROTATING ELECTRIC MACHINE AND ROTOR THEREOF - A rotor of a rotating electric machine includes a cylindrical rotor core, a plurality of coil slots provided on an outer periphery of the rotor core along a rotor axis direction, rotor coils disposed in the coil slots by laminating a plurality of field conductors through an insulation material, a rotor wedge disposed at an opening end portion of the coil slot so as to support the rotor coil, a coil ventilation duct formed in the coil slot so as to pass through the rotor coils, the rotor wedge and the insulation material, and sub-slots provided at bottom portions of the coil slots so as to be communicated with rotor core ends and the coil ventilation ducts. In such a rotor of a rotating electric machine, the coil slot, the sub-slots and the coil ventilation duct constitute a cooling gas channel for distributing a cooling gas to thereby cool the rotor coils. A depth in a diameter direction of each sub-slot from the rotor coil end to a nearest coil ventilation duct is larger than a depth of the sub-slot at a portion near a center of the rotor core. | 2008-10-16 |
20080252157 | Electric Machine - The invention relates to an electric machine ( | 2008-10-16 |
20080252158 | TORQUE RESISTANT TERMINAL BLOCK ASSEMBLY - A power terminal having a unitary connector body. The body includes at least one opening therethrough. The opening is configured to receive an electrically conductive member. The body further includes a recess configured to receive a cap portion of the electrically conductive member. The connector body has an electrically insulative coating on at least a portion of a surface thereof. The insulative coating provides sufficient electrical insulation to substantially prevent electrical communication between the electrically conductive member and the connector body. A method for fabricating a power terminal is also provided. | 2008-10-16 |
20080252159 | Transmission Drive Unit with a Plug-in Electronics Module - Gear drive unit ( | 2008-10-16 |
20080252160 | Connecting Plate for Electric Motor and Electric Motor - A connecting plate for an electric motor has at least one receptacle area with at least one receptacle opening for one or more sensors for monitoring the rotor position. Furthermore, an electric motor which has such a connecting plate is described. With the novel device it is possible to simplify the manufacture of the electric motor, and in particular to minimize the length of the connecting lines to the sensors by integrating the sensor holder into the connecting plate. | 2008-10-16 |
20080252161 | Magnetic bearing device and magnetic bearing spindle device - A control device includes a differential amplifying circuit for obtaining a difference between values of exciting currents (exciting voltage values) supplied to a pair of axial electromagnets and a pair of radial electromagnets, multiplying the obtained difference by coefficient times, and outputting it as the bearing load in an axial direction and a radial direction. The exciting current includes steady current supplied to the axial electromagnets and the radial electromagnets and control current which varies by the displacement of a main shaft. By supplying the steady current to the axial electromagnets and the radial electromagnets, the magnetic attraction force of the axial electromagnets and the radial electromagnets having non-linearity is linearly approximated. Accordingly, the difference between the values of the exciting currents (exciting voltages) supplied to a pair of electromagnets is obtained and is multiplied by coefficient times, thereby obtaining a value corresponding to the bearing load. | 2008-10-16 |
20080252162 | PASSIVE MAGNETIC BEARING CONFIGURATIONS - A journal bearing provides vertical and radial stability to a rotor of a passive magnetic bearing system when the rotor is not rotating and when it is rotating. In the passive magnetic bearing system, the rotor has a vertical axis of rotation. Without the journal bearing, the rotor is vertically and radially unstable when stationary, and is vertically stable and radially unstable when rotating. | 2008-10-16 |
20080252163 | MOUNTING STRUCTURE FOR A STATOR OF A MOTOR- STATOR - A mounting structure for a motor includes a central tube ( | 2008-10-16 |
20080252164 | Variable speed motor - Shift gears of a variable speed motor is no longer needed for a set of gears, but multiple layers disks with magnets fit over an axle rotated by a multiple layers annular opening of a housing, where winding coils wound along inside each annulus seperately. When electrifying each winding coils on each annulus, each corresponding disk can rotate the axle at a fixed ratio to output an extreme high speed or a high torque at low or moderate speed. Such disks and annuli are arranged according to their decrement diameters from the opening to a top of the housing; thereby, each disk is corresponding to each annulus with winding coils in one-to-one relationship. However, magnets disposed to a perimeter of each disk, which is made from magnetic insulation material, such as aluminum alloys, to avoid from interference among each disk. | 2008-10-16 |
20080252165 | Rotor for permanent magnet motor | 2008-10-16 |
20080252166 | Rotor Core For Rotating Electrical Machine and Method of Manufacturing the Same - A rotor core of a rotating electrical machine formed by stacking a plurality of blanks blanked from a steel sheet, the blank having a yoke, a magnetic pole portion confronting the yoke, and a magnet insertion hole positioned between the yoke and the magnetic pole portion, the magnetic pole portion having a projection projecting circumferentially at two circumferential sides thereof. | 2008-10-16 |
20080252167 | ALTERNATING-CURRENT DYNAMOELECTRIC MACHINE - A projected shape of permanent magnets is contained within a plane of projection formed by adjacent claw-shaped magnetic poles overlapping when the claw-shaped magnetic poles are viewed in a direction of rotation of a rotor, and is generally similar in shape to a shape of the plane of projection. | 2008-10-16 |
20080252168 | Rotary electro-dynamic machine and armature winding thereof - Sub core sections are arranged at the end portions and the center portion of a stator core, and strand conductors are twisted and transposed by 360 degrees continuously toward the extending direction of winding slot. The length corresponding to transposition pitch 180 degrees of the strand conductors of the stator core is set as one core unit area, the sub core sections including portions whose space factors are different are arranged such that the sum of voltages in the strands induced in the strand conductors in the odd-numbered core unit area from one end portion of the stator core offsets the sum of voltages in the strands induced in the strand conductors in the even-numbered core unit area from the end portion of the core. | 2008-10-16 |
20080252169 | Rotary electro-dynamic machine and armature winding thereof - Sub core sections are arranged at the end portions and the center portion of a stator core, and strand conductors are twisted and transposed by 360 degrees continuously toward the extending direction of winding slot. The length corresponding to transposition pitch 180 degrees of the strand conductors of the stator core is set as one core unit area, the sub core sections including portions whose space factors are different are arranged such that the sum of voltages in the strands induced in the strand conductors in the odd-numbered core unit area from one end portion of the stator core offsets the sum of voltages in the strands induced in the strand conductors in the even-numbered core unit area from the end portion of the core. | 2008-10-16 |
20080252170 | DYNAMOELECTRIC MACHINE INSULATOR AND METHOD - A dynamoelectric machine insulator includes, a body having a plurality of holes therethrough at least some of the plurality of holes being receptive of a lead such that a lead extending through each of the plurality of holes is electrically isolated from a lead extending through each of the other of the plurality of holes, and at least one channel in the body extending arcuately along a perimetrical extent of the body. The at least one channel configured and dimensioned to insulate at least one lead routed therein. | 2008-10-16 |
20080252171 | Surface Acoustic Wave Motor - In an energy recovery type surface acoustic wave motor, an increase in energy efficiency at the time of energy recovery and supply is achieved by adjusting phase change. A surface acoustic wave motor comprises: a surface acoustic wave substrate; a slider provided with an applied pressure; a driving interdigital electrode connected to an external power supply for generating a driving surface acoustic wave on a surface so as to drive the slider by a frictional force which is generated on a contact surface of the slider with the surface acoustic wave substrate based on the surface acoustic wave and the applied pressure; recovery interdigital electrodes placed forward and backward in the direction of travel of the surface acoustic wave for recovering energy of a surface acoustic wave unused to drive the slider, and for using that energy to generate a surface acoustic wave; and phase adjusting means for matching the phase of a surface acoustic wave generated by the recovery interdigital electrodes to the phase of the driving surface acoustic wave W generated by the driving interdigital electrode. | 2008-10-16 |
20080252172 | ACOUSTIC STACK FOR ULTRASONIC TRANSUCERS AND METHOD FOR MANUFACTURING SAME - An acoustic stack for ultrasonic transducers comprising a backing block, flexible printed circuit board, piezoelectric ceramic layer, and acoustic matching layer. The various components of the acoustic stack are bonded together using an adhesive material and high pressure in a lamination process. The piezoelectric ceramic layer is manufactured to provide electrical and acoustic isolation without the need for dicing through multiple layers of the acoustic stack. A flex circuit provides the necessary electrical connections to the electrically isolated electrodes of the piezoelectric ceramic layer. | 2008-10-16 |
20080252173 | Drive unit - It is provided a drive unit | 2008-10-16 |
20080252174 | ENERGY HARVESTING FROM MULTIPLE PIEZOELECTRIC SOURCES - Energy harvesting systems and methods that use multiple piezoelectric generators connected to the same energy harvesting circuit with minimal or no energy loss. The piezoelectric energy harvesting system may include individual diode bridge circuits electrically connected to the outgoing wires from each piezoelectric generator. The piezoelectric energy harvesting system may include multiple subsystems each having one or more individual diode bridges electrically connected to the outgoing wires from multiple piezoelectric generators. Multiple subsystems, each having multiple piezoelectric generators and a diode bridge, may be electrically connected to the same energy harvesting circuit. The use of multiple piezoelectric generators connected to the same energy harvesting circuit results in improved energy harvesting capabilities, and a simplified and low cost energy harvesting system. | 2008-10-16 |
20080252175 | Dithering mechanism for eliminating zero-rate bias in a gyroscope - Dithering mechanism and method for eliminating the effects of zero-rate bias in a rate sensor or gyroscope. Both continuously moving and indexing embodiments are disclosed. The mechanism includes a first part mounted in a fixed position centered about a dither axis perpendicular to the input axis of the gyroscope, a second part disposed coaxially of the first part and affixed to the sensing element of the gyroscope, and a plurality of piezoelectrically driven quartz flexure beams extending radially between the first and second parts for dithering the second part about the dither axis. In some embodiments, the dithering mechanism is formed separately from and affixed to the sensing element of the gyroscope, and in others it is formed integrally with the sensing element. In the indexing embodiments, radial arms and fixed stops limit movement of the mechanism between two fixed positions, and drive signals and holding potentials are applied alternately to dither the mechanism between the two positions and to hold it alternately in those positions during successive data acquisition periods. | 2008-10-16 |
20080252176 | ELECTROACTIVE POLYMER TORSIONAL DEVICE - The present invention relates to mechanical-electrical power conversion systems. The systems comprise one or more electroactive polymers that convert between electrical and mechanical energy. When a voltage is applied to electrodes contacting an electroactive polymer, the polymer deflects. This deflection may be converted into rotation of a power shaft included in a motor. Repeated deflection of the polymer may then produce continuous rotation of the power shaft. | 2008-10-16 |
20080252177 | Indexing dithering mechanism and method - Dithering mechanism and method for eliminating the effects of zero-rate bias in a rate sensor or gyroscope. Both continuously moving and indexing embodiments are disclosed. The mechanism includes a first part mounted in a fixed position centered about a dither axis perpendicular to the input axis of the gyroscope, a second part disposed coaxially of the first part and affixed to the sensing element of the gyroscope, and a plurality of piezoelectrically driven quartz flexure beams extending radially between the first and second parts for dithering the second part about the dither axis. In some embodiments, the dithering mechanism is formed separately from and affixed to the sensing element of the gyroscope, and in others it is formed integrally with the sensing element. In the indexing embodiments, radial arms and fixed stops limit movement of the mechanism between two fixed positions, and drive signals and holding potentials are applied alternately to dither the mechanism between the two positions and to hold it alternately in those positions during successive data acquisition periods. | 2008-10-16 |
20080252178 | CONTOUR RESONATOR - A contour resonator at least includes a first vibrating substrate and a second vibrating substrate having main surfaces that face each other and are bonded. The contour resonator includes a first excitation electrode provided on a front main surface of the first vibrating substrate, a second excitation electrode provided on a back main surface of the second vibrating substrate, and a common intermediate excitation electrode provided at an interface between the first vibrating substrate and the second vibrating substrate. The first excitation electrode and the second excitation electrode are electrically connected to constitute a first terminal. The intermediate excitation electrode constitutes a second terminal. The first vibrating substrate and the second vibrating substrate perform a contour vibration in accordance with an excitation signal applied between the first terminal and the second terminal. | 2008-10-16 |
20080252179 | Piezoelectric Element and Method for Manufacturing the Piezoelectric Element - A piezoelectric element includes a piezoelectric ceramic body containing an internal electrode. The piezoelectric ceramic body is mainly made of a perovskite complex oxide containing an alkali metal niobate-based compound containing at least one element selected from among K, Li, and Na. The internal electrode is made of a base metal material, such as Ni or Cu. The piezoelectric element is produced by co-sintering the internal electrode and the piezoelectric ceramic body. Thus, there is provided an inexpensive piezoelectric element that can be properly used in practice even though it has been fired in a reducing atmosphere. | 2008-10-16 |
20080252180 | Electricity Generating Playground Equipment and Method - An electricity generating playground device configured for recreational activity by children includes a playground device having a cyclically movable part. An electricity generator is operably coupled to the cyclically movable part, and operable to generate electricity when the cyclically movable part is moved through a cyclical motion. A duty cycle controller is operably coupled to the electricity generator, and operable to convert a predetermined portion of the kinetic energy of the cyclically movable part to usable electricity. | 2008-10-16 |
20080252181 | Small diameter stepping motor, bobbin used therein and manufacturing method thereof - In a small diameter stepping motor including two stator units each including a bobbin formed of an insulating material, each bobbin includes: a circular hollow cylinder portion having a winding; two flanges disposed respectively at the both ends of the cylinder portion; and a terminal structure disposed at one of the two flanges and including two terminal blocks and a pair of electrical contact members at which the lead-out lines of the winding are terminated, wherein the two terminal blocks are circumferentially shifted in position from each other with respect to the cylinder portion axis extend axially outwardly, and the terminal blocks of one bobbin intermesh with the terminal blocks of the other bobbin such that the terminal blocks of the one bobbin overhang a part of the winding wound on the other bobbin and vice versa when the two stator units are coupled to each other. | 2008-10-16 |
20080252182 | System and Method for Controlling an Output of an Auxiliary Power Source of a Diesel Powered System - A system and method for controlling a power output of an auxiliary alternator of a diesel powered system having at least one diesel-fueled power generating unit, the alternator powering at least one dynamoelectric device of the diesel powered system. The system includes an alternator coupled to the diesel-fueled power generating unit having a wound rotor for supplying electrical power to at least one dynamoelectric device of the diesel powered system. The system also includes a controller for determining a desired operating frequency of the dynamoelectric device and providing a control signal for producing the desired operating frequency. The system further includes a regulator for providing a rotor control output responsive to the control signal to control an electrical condition of the rotor for adjusting the electrical power supplied to the dynamoelectric device effective to produce the desired operating frequency. | 2008-10-16 |
20080252183 | HARD DISK DRIVE AND DISPLAY UNIT - According to one embodiment, a hard disk drive comprises a housing, a drive main unit contained in the housing, a frame which supports the drive main unit to keep the drive main unit away from the housing, a projection contained in the housing and inwardly projecting, the frame being mounted on the projection, and a bush provided between the frame and the projection. The bush radially receives the weight of the drive main unit. The frame includes a frame main body, a holding portion incorporated in the frame main body and supporting the bush, and a contact portion provided independently of the holding portion and radially contacting the bush. | 2008-10-16 |
20080252184 | Refrigerator Case - A refrigerated case ( | 2008-10-16 |
20080252185 | File storage system for hanging files - A sliding file storage frame for mounting in a cabinet having a front opening door includes a rectilinear brace frame that is affixed to left and right drawer slides for longitudinal translation in and out of the cabinet. The drawer slides have a fixed section and at least one sliding section wherein the sliding section is affixed to the respective sides of the rectilinear brace frame. A hanging file support grid is supported intermediate to the front and rear braces and intermediate to the left and right sides of the rectilinear brace frame between the left and right drawer slides. | 2008-10-16 |
20080252186 | Kitchen appliance having a floating glass panel - A glass panel assembly for kitchen appliances includes a glass panel and a plurality of spacers. The spacers are mounted to an outer surface of the appliance and an inner surface of the glass panel. Preferably, the spacers are adhesively secured to the glass panel and are not visible when viewing the kitchen appliance from the front. Trim pieces fit between the glass panel and the appliance door to cover and further hide the spacers from view. The glass panel can be mounted to any outer surface of the appliance such as an appliance door, side walls or even a top wall. The particular construction of the spacers, in combination with the trim pieces creates an illusion that glass panel appears to float relative to the appliance. | 2008-10-16 |
20080252187 | ELECTRONIC DEVICE - An electronic device is provided. The electronic device includes a housing, a front panel, a strip-shaped decorative member and a projecting portion. The front panel is provided to the housing. The strip-shaped decorative member has a predetermined width and is arranged on the front panel. The projecting portion is integrally formed with the strip-shaped decorative member and includes a surface inclined in a depth direction at a position having a predetermined distance from a front edge of a lower surface of the strip-shaped decorative member. The strip-shaped decorative member including the projecting portion is attached to the front panel while the surface inclined in the depth direction being exposed to a front side. | 2008-10-16 |
20080252188 | FURNITURE SYSTEM ENCLOSING ENTERTAINMENT ELECTRONICS IN RANGE OF WIDTHS - An entertainment center includes a base that expands horizontally to accommodate different width home theater displays; and, a light bridge that rests on top of one or more cabinets placed on either side of the base. The side cabinets provide a vertical column of open space for accommodating wiring among the entertainment system components and ventilation for heat generated by those components. The base includes casters to facilitate moving the base in and out from between the side cabinets. Sliding portions of the base extend horizontally yet continue to transfer all load weight onto the casters. The front woodwork of the base presents a pleasing seamless appearance as a consequence of overlapping trim pieces. | 2008-10-16 |
20080252189 | Storage and Drying Unit for Storing and Drying Outerwear, Sports Clothing and Equipment - A storage and drying unit for storing and drying outerwear, sports clothing or equipment is provided. The unit comprises an enclosure having a back wall, a top wall, and two side walls defining at least one chamber with an open front. The chamber may also include shelf members for supporting the outerwear, sports clothing or equipment. The walls and any shelf members include aeration holes for allowing movement of air through the chamber in order to facilitate the drying of the outerwear, sports clothing or equipment placed in the chamber. The unit may be provided with a drying fan to encourage an airflow past the outerwear, sports clothing or equipment in the chamber to facilitate drying of same. The unit may also be provided with hangars for hanging the outerwear, sports clothing or equipment. These hangars are sized and shaped to be removably inserted into any one of the aeration holes. | 2008-10-16 |
20080252190 | Reconfigurable Storage System - A storage system comprises a base unit, one or more self supports, a drawer assembly, and one or sore stops. The base unit includes a pair of opposing sidewalls. The one or more shelf supports are adapted to be removably carried by the opposing sidewalls to define one or more storage locations. The drawer assembly includes a base shelf and a drawer slidably carried by the base shelf. The base shelf is configured to be removably supported on the shelf supports within the one or more storage locations. The one or more stops are adapted to be removably carried by the opposing sidewalls opposite the base shelf from the shelf supports. Thus, the stops retain the base shelf in engagement with the shelf supports even when the drawer is loaded and pulled partially out of the base unit during use. | 2008-10-16 |
20080252191 | Damper and Home-Bar Door Apparatus for Refrigerator Using the Same - The present invention relates to a home-bar door apparatus for a refrigerator. The home-bar door apparatus includes a home-bar door ( | 2008-10-16 |
20080252192 | LIGHT EMISSION DEVICE AND DISPLAY DEVICE PROVIDED WITH THE SAME - A light emission device includes first and second substrates opposing each other to form a vacuum vessel, an electron emission unit located on the first substrate, a light emission unit located on the second substrate and emitting visible light in response to electrons emitted from the electron emission unit, and a heat dissipating sheet located on an outer surface of the second substrate. The heat dissipating sheet includes carbon nanotubes. A display device includes the light emission device, and a panel assembly located in front of the light emission device to transmit therethrough the light emitted from the light emission device to display images. | 2008-10-16 |
20080252193 | Fluorescent Lamp, Backlight Unit and Liquid Crystal Television - The present invention relates to a fluorescent lamp, and in particular to a fluorescent lamp with an improved in-dark starting characteristic. A fluorescent lamp includes: a glass bulb ( | 2008-10-16 |
20080252194 | ELECTRON EMITTER, FIELD EMISSION DISPLAY UNIT, COLD CATHODE FLUORESCENT TUBE, FLAT TYPE LIGHTING DEVICE, AND ELECTRON EMITTING MATERIAL - To provide an electron emitter, a field emission display unit, a cold cathode fluorescent tube and a flat type lighting device, which employ an electron emitting material producible at a low cost and in a large amount. | 2008-10-16 |
20080252195 | FIELD-EMISSION-BASED FLAT LIGHT SOURCE - A field-emission-based flat light source includes a light-permeable substrate, a transparent electrically conductive cathode, an electron emitter, an anode layer, a light-reflecting layer, a fluorescent layer. The light-permeable substrate has a surface. The transparent electrically conductive cathode layer is disposed on the surface of the light-permeable substrate. The electron emitter is disposed on the transparent electrically conductive cathode layer. The anode layer faces and is spaced from the transparent electrically conductive cathode layer. A vacuum chamber is formed between the anode layer and the transparent electrically conductive cathode layer. The light-reflecting layer is formed on the anode layer, and faces the transparent electrically conductive cathode layer. The fluorescent layer is formed on the light-reflecting layer. | 2008-10-16 |
20080252196 | Active-Matrix Field Emission Display - Provided is a field emission display (FED) in which field emission devices are applied to a flat panel display. The FED includes: a cathode plate including a substrate, first and second thin film transistors (TFTs) that are serially connected on the substrate, a field emitter disposed on a drain electrode of the second TFT, a gate insulating layer having a gate hole surrounding the field emitter, and field emission gate electrodes disposed on the gate insulating layer; and an anode plate including a substrate, and red, green, and blue phosphors disposed on the substrate, wherein the cathode plate and the anode plate are vacuum-packaged parallel and opposite to each other. According to the present invention, uniformity of the FED panel can be significantly improved, and an inherent source-drain leakage current of the TFT can be significantly reduced, so that a contrast ratio of the FED can be significantly enhanced. | 2008-10-16 |
20080252197 | Color temperature tunable white light source - A color temperature tunable white light source comprises: first and second LED arrangements operable to emit light of first and second wavelength range respectively that are configured such that their combined light output, which comprises light generated by the source, appears white in color. One or both LED arrangements comprises a phosphor provided remote to an associated LED operable to generate excitation radiation and to irradiate the phosphor such that it emits light of a different wavelength range, wherein the light emitted by the LED arrangement comprises the combined light from the LED and phosphor. The color temperature of output white light is tunable by controlling the relative light outputs of the LED arrangements by for example controlling the relative magnitude of the drive currents of the LEDs or a duty cycle of a pulse width modulated drive current. | 2008-10-16 |
20080252198 | Red Fluorescence Conversion Medium, Color Conversion Substrate Using Same and Light-Emitting Device - A red fluorescence conversion medium including; a light-transmitting medium, a first perylene fluorescent dye that emits red fluorescence, and a second fluorescent dye that absorbs light in a ultraviolet to blue region to emit fluorescence, wherein the first perylene fluorescent dye absorbs light containing the fluorescence emitted by the second fluorescent dye to emit fluorescence. | 2008-10-16 |
20080252199 | Light Emitting Element and Light Emitting Device - The present invention provides a light-emitting element sandwiching a composite layer in which an organic compound and an inorganic compound are mixed between a first electrode and a second electrode, where the composite layer includes a first layer including a first organic compound and a first inorganic compound that exhibits an electron accepting property to the first organic compound (serves as an electron acceptor), a second layer including a second organic compound and a second inorganic compound, and a third layer including a third organic compound and a third inorganic compound that exhibits an electron donating property to the third organic compound (serves as an electron acceptor). | 2008-10-16 |
20080252200 | Display device and method of making display device - A display device with increased lifespan is presented. The device includes a plurality of thin film transistors, a passivation layer formed on the thin film transistors, a plurality of pixel electrodes formed on the passivation layer and electrically connected to the thin film transistors, and a wall dividing the pixel electrodes. The wall has a main section and an auxiliary section that is lower than the main section. A caved-in section is disposed between the main section and the auxiliary section. An organic layer is formed on the pixel electrodes. | 2008-10-16 |
20080252201 | ELECTRICAL CONNECTION IN OLED DEVICES - In one aspect of the present invention, a method of making an OLED device comprises providing a substrate; a first electrode, a conductive bus line over the substrate and an organic electroluminescent media over the first electrode and over the conductive bus line. A laser that operating at a predetermined wavelength and is scanned over the conductive bus line in a predetermined direction so that the conductive bus line absorbs sufficient energy to cause the ablation a portion of the organic electroluminescent media over the conductive bus line thereby forming an opening in the organic electroluminescent media. The width of the laser beam in the predetermined direction is less than four times the width of the conductive bus line; and forming a second electrode over the organic electroluminescent media, the first electrode, and through the opening in the organic electroluminescent media. | 2008-10-16 |
20080252202 | LIGHT-EMITTING DEVICE AND ARTICLE - A device that includes at least one light transmissive element; a plurality of light transmissive organic electronic devices that are secured to the light transmissive element; and at least one light transmissive controller secured to the light transmissive element. The light transmissive controller is connected to at least two light transmissive organic electronic devices. An article includes two or more of the devices. | 2008-10-16 |
20080252203 | ORGANIC LIGHT EMITTING DIODE DISPLAY - An organic light emitting diode display comprises a substrate having a pixel area and a non-pixel area, a plurality of pixels formed in the pixel area, a power line with a uniform width formed in the non-pixel area configured to supply a common power voltage to the pixels, a cathode electrode formed on the substrate, and a cathode power line formed in the non-pixel area on the same layer as the power line and coupled to the cathode electrode to supply a cathode voltage to the pixels, wherein each pixel comprises a thin film transistor and an organic light emitting element. | 2008-10-16 |
20080252204 | Organic Electroluminescence Device and Manufacturing Method of the Same - An organic EL device of top emission type having a structure of a transparent conductive layer on a metal reflecting layer, and particularly an organic EL device having a high luminance with the stability capable of maintaining the high luminance over the long period of time is provided. The organic EL device includes a metal electrode layer serving as a metal reflecting film, a transparent conductive layer, an organic functional layer having an organic EL layer, and a transparent electrode layer which are successively laminated on a substrate, and a formation area of the metal electrode layer resides inside a protection area where the transparent conductive layer is formed on the substrate. | 2008-10-16 |
20080252205 | Large Area Organic Diode Device and a Method of Manufacturing It - An organic diode device ( | 2008-10-16 |
20080252206 | ORGANIC ELECTROLUMINESCENT DISPLAY DEVICE AND METHOD FOR FABRICATING THE SAME - The present invention discloses organic electroluminescent display device and a method for fabricating the same, which includes: a first hole transporting layer formed in the first, second, and third pixel regions; a second hole transporting layer formed on a portion of the first hole transporting layer in the second and third pixel regions; a third hole transporting layer formed on a portion of the second hole transporting layer in the third pixel region. Light emitting layers are formed on each of the first, second, and third hole transporting layers. The thickness of the second hole transporting layer is approximately one-third (⅓) to two-thirds (⅔) of an optical wavelength difference between the first and second pixel regions, and the thickness of the third hole transporting layer is approximately one-third (⅓) to two-thirds (⅔) of an optical wavelength difference between the second and third pixel regions. | 2008-10-16 |
20080252207 | Light emitting device and manufacturing method of the same - Not all of light generated in the light emitting layer comprising the organic material are taken out in the desirable direction. For example, light emitted in the lateral direction (the direction parallel to the substrate face) is not taken out and therefore is a loss. An object of the present invention is to provide a light emitting device structured so as to increase the amount of light which is taken out in a certain direction after emitted from a light emitting element, as well as a method of manufacturing this light emitting device. | 2008-10-16 |
20080252208 | OLED DEVICE WITH SHORT REDUCTION - In an OLED device having a substrate, a first electrode layer disposed over the substrate, an inorganic short reduction layer disposed over the first electrode layer, an organic electroluminescent medium disposed over the short reduction layer, and a second electrode layer over the electroluminescent medium, a feature is the inclusion of a mixture of ZnS, SiO | 2008-10-16 |
20080252209 | MULTILAYER NANOCRYSTAL STRUCTURE AND METHOD FOR PRODUCING THE SAME - Disclosed herein is a multilayer nanocrystal structure comprising a nanocrystal alloy core comprising two or more nanocrystals and including an alloy interlayer formed at an interface between the two or more nanocrystals, and one or more layers of nanocrystal shells formed sequentially on the surface of the nanocrystal alloy core, wherein the nanocrystal shells each have different band gaps. The multilayer nanocrystal structure can be applied to various electronic devices owing to its advantages of high luminescence efficiency, superior optical stability, and superior chemical stability. | 2008-10-16 |
20080252210 | Electrode Patterning - A method is provided to isolated conductive pads on top of a multi-layer polymer device structure. The method utilizes laser radiation to ablate conductive material and create a non-conductive path, electrically isolating the conductive pads. The process is self-limiting and incorporates at least one layer within the stack that absorbs the radiation at the required wavelength. The prevention of radiation degradation of the underlying layers is achieved, as absorption of radiation occurs primarily on the surface of the structure, but not in any of the radiation sensitive underlying layers of the electronic device. The method preferably uses low energy infrared radiation which has been shown to produce little debris and no device degradation. | 2008-10-16 |
20080252211 | Electroluminescent Lamp - An EL lamp includes a substrate, which is transparent in at least a light-emitting region and an electrode assembly with a transparent electrode layer and a back electrode layer, which face each other in the light-emitting region. A phosphorescent layer and a dielectric layer are arranged between the transparent electrode layer and the back electrode layer. A first connection line is provided for connecting the transparent electrode to a driver circuit and a second connection line is provided for connecting the back electrode to a driver circuit. According to an important aspect of the invention, the EL lamp comprises an insulating layer for insulating the second connection line at least locally from the back electrode and/or, if the transparent electrode extends into a peripheral region of the EL lamp, for insulating the second connection line from the transparent electrode. | 2008-10-16 |
20080252212 | Solid state device and light-emitting element - A solid-state device having: a flip-chip mounted solid-state element; a power receiving/feeding portion having a mounting substrate to allow that a mounting surface of the solid-state element forms substantially the same plane as a surface of the mounting substrate; and an inorganic sealing portion made of an inorganic sealing material having a thermal expansion coefficient equal to that of the power receiving/feeding portion for sealing the solid-state element. | 2008-10-16 |
20080252213 | Plasma display panel and method of fabrication thereof - A low-cost process technology is proposed for the making and manufacture of bus electrodes or fence electrodes, which are structural parts or objects of a Plasma Display Panel (PDP). The low-cost process proposed makes the above-mentioned bus electrodes or fence electrodes that exhibit outstanding conductivity and sufficient shading characteristics. The proposed PDP has a front panel and a back panel. The back panel is set at a fixed distance from the front panel. The front panel has a number of two or more sustain scan electrodes arranged in parallel on the above-mentioned front panel surface, two or more data electrodes arranged in the direction which crosses the above-mentioned sustain scan electrodes, and two or more partitions that are arranged between the above-mentioned front panel and the above-mentioned back panel, in order to divide the electric discharge cell. The above-mentioned sustain scan electrode has a transparent electrode and a bus electrode arranged on the above-mentioned transparent electrode. The above-mentioned bus electrode is formed sequentially from the side that touches the above-mentioned transparent electrode with a double-layer composition. The double layer composition is composed of a black ground layer and a non-black electric conduction layer. The above-mentioned bus electrode is formed by first exposing light or lights on a positive type photosensitive paste on the above-mentioned black ground layer by using the above-mentioned non-black electric conduction layer as a pattern formation mask, and secondly the above-mentioned black ground layer is applied. | 2008-10-16 |
20080252214 | Plasma Display Panel - An object of the present invention is to provide a high-definition PDP having a high luminance and low electric power consumption by keeping a line resistance of a bus electrode low and supplying enough electric power to a bus electrode edge in an extending direction of the bus electrode. | 2008-10-16 |
20080252215 | PLASMA DISPLAY DEVICE - A plasma display device includes: a plasma display panel including an address electrode disposed on a first substrate, a pair of first and second display electrodes disposed on a second substrate and crossing the address electrode, a dielectric layer covering the first and second display electrodes on the second substrate, an MgO protective layer covering the dielectric layer on the second substrate, and discharge gases filled between the first and second substrates; a driver that drives the plasma display panel; and a controller that controls a sustain pulse width of a sustain period to be 1 to 3.5 μs. The MgO protective layer includes 200 to 3000 ppm by weight of Ca based on the content of MgO. The plasma display device shows improved discharge stability and display quality due to reduced discharge delay time. | 2008-10-16 |
20080252216 | Discharge Lamp and Electrode for Use in the Same - It is possible to enhance the luminance of a cold-cathode type discharge lamp and to contribute to a prolongation of service life thereof. A discharge lamp | 2008-10-16 |
20080252217 | Pixel, organic light emitting display using the same, and associated methods - An organic light emitting display includes a scan driver configured to sequentially supply a scan signal to scan lines and sequentially supply a light emitting control signal to light emitting control lines, a data driver configured to supply a data signal to data lines, and pixels arranged coupled to the scan lines, the data lines and the light emitting control lines. Each of the pixels includes an organic light emitting diode, a second transistor, a storage capacitor coupled between an i-1 | 2008-10-16 |
20080252218 | Low-Pressure Mercury Vapor Discharge Lamp - A low-pressure mercury vapor discharge lamp is operable in a first mode of operation (“normal mode”) and a second mode of operation (“emergency operation”). The discharge lamp comprises a discharge vessel ( | 2008-10-16 |
20080252219 | IGNITION CONTROL DEVICE - The invention provides an ignition control device and a killing control device correspond. An ignition control device comprises an ignition circuit module and a killing control device corresponds. The ignition circuit module comprises a killing control device including a killing switch and a timing retard circuit module connected to the ignition circuit module. When the killing control operates, the ignition circuit stops igniting. The invention has following advantages: reasonable structure, low cost, stable control circuit and safe operation and so on. | 2008-10-16 |
20080252220 | SERIES WIRED LIGHT STRING WITH SHUNTS AND FLASHER BULBS FOR EXHIBITING A TWINKLING EFFECT - A circuit to cause the dimming and brightening of a series connected light string periodically by providing a unidirectional shunt and a flasher bulb in at least one of the sockets to intermittently cause the string to go to its dimmer state when the flasher bulb goes out and the full brightness to return when the flasher bulb comes back on. This shunt is preferably provided in the first light socket next to the AC plug. In another embodiment of the present invention, bidirectional shunts are provided in some of the sockets in an otherwise unidirectionally shunted series connected light string for the purpose of achieving random twinkle by inserting flasher bulbs in those sockets. The unidirectional shunts used in the present invention can be a diode array or a rectifier in series with a Zener diode in its Zener direction. The bidirectional shunts are devices which conduct current in both directions, such as back-to-back Zener diodes; metal oxide varistors; silicon trigger switches (STS devices); a diode array; or resistors. | 2008-10-16 |
20080252221 | Protection device for discharge lamp inverter - The present invention discloses a protection device for a discharge lamp inverter, which is electrically coupled to an inverter outputting at least two opposite-phase powers to drive at least one discharge lamp via at least two power cables. The protection circuit of the present invention comprises the following components: at least two voltage-division units, a detection unit, and a trigger unit. The two voltage-division units are correspondingly electrically coupled to the power cables to obtain the opposite-phase powers and are connected in series at a connection point in the other ends thereof. The detection unit detects the voltage variation of the connection point of the voltage-division units and then generates an abnormal signal. The trigger unit receives the abnormal signal and outputs a protection signal to the inverter to stop outputting power to the discharge lamp. | 2008-10-16 |
20080252222 | SYSTEMS AND METHODS FOR DRIVING LIGHT-EMITTING DIODES - At least some embodiments include a LED driver system. The system includes multiple branches of series-coupled LEDs, multiple current sources, and control logic. Each of the current sources is coupled to a separate branch of series-coupled LEDs. The control logic is coupled to the current sources, and is configured to regulate current through each branch based at least in part on a feedback voltage measured at a node in one of the branches. | 2008-10-16 |
20080252223 | Organic EL Display Device - The present invention provides an organic EL display device with high detection accuracy which can enhance both of light emission efficiency and light reception efficiency. In an organic EL display device which includes organic thin film elements, a power source line is connected to the organic thin film elements via drive TFTs, a signal line is connected to a gate of the drive TFT to supply a potential corresponding to a gray scale signal, a switch is provided for connecting the signal line and the organic thin film element, and the switch is controlled to allow an electric current which is obtained by photoelectric conversion with the organic thin film element to flow in the signal line and the organic thin film element during a period in which a gray scale signal is not applied to the signal line. | 2008-10-16 |
20080252224 | Ballast with Socket-To-Fixture Voltage Limiting - A ballast ( | 2008-10-16 |
20080252225 | Dielectric Barrier Discharge Lamp Lighting Device - A dielectric barrier discharge lamp lighting device includes a transformer that supplies a driving voltage to a dielectric barrier discharge lamp from a secondary coil, and a driving circuit that controls an input voltage to the transformer to supply a driving voltage with a driving frequency fd to the dielectric barrier discharge lamp. The self-resonant frequency fr of the secondary coil, which is measured with the primary coil of the transformer being open, is equal to the driving frequency fd or a frequency in the vicinity of the driving frequency fd. This frequency fr satisfies, for example, 0.9fd≦fr≦1.3fd. | 2008-10-16 |
20080252226 | LIGHT SOURCE DRIVING DEVICE - A light source driving device includes a power stage circuit, a first transformer circuit, a second transformer circuit, and a feedback control circuit. The power stage circuit converts a received signal to an alternating current (AC) signal, which includes a synchronizing switching bridge arm, a first bridge arm, and a second bridge arm. The synchronizing switching bridge arm has a Soft-Switching function, and forms a first full-bridge circuit with the first bridge arm and forms a second full-bridge circuit with the second bridge arm. The first transformer circuit is connected to the first full-bridge circuit, for converting the AC signal. The second transformer circuit is connected to the second full-bridge circuit, for converting the AC signal. The feedback control circuit is connected between the light source module and the power stage circuit, for controlling output of the power stage circuit. | 2008-10-16 |
20080252227 | Method and Circuit for Driving Gas Discharge Lamps Using a Single Inverter - For driving one or more gas discharge lamps ( | 2008-10-16 |
20080252228 | Hid Ballast - A method and apparatus are disclosed for providing current to a load. The apparatus includes a full or half bridge switching circuit, including at least one switching element for supplying power to a load when switched on and means for switching a state of the switching element only at a time when a substantially zero voltage is applied across the switching element. | 2008-10-16 |
20080252229 | High efficiency AC LED driver circuit - In an AC drive circuit for LEDs, a current limiting capacitor connects to an AC source, a first circuit portion, including a first rectifying diode and a first power capacitor, connects between the current limiting capacitor and the source and a second circuit portion, including a second rectifying diode in series with a second power capacitor, is in parallel with the first circuit portion. A first LED is in the first circuit portion in parallel with the first power capacitor, while a second LED in the second circuit portion is in parallel with the second power capacitor. During positive half cycles, the first rectifying diode charges the first power capacitor and drives the first LED. During negative half cycles, the second rectifying diode charges the second power capacitor and drives the second LED. | 2008-10-16 |
20080252230 | IMAGING APPARATUS, STROBE DEVICE, AND CHARGING-CONTROL METHOD - An imaging apparatus including a strobe device having a charging circuit of a separately excited oscillation type is provided. The apparatus includes a main capacitor in which charge is accumulated to supply power to a strobe-light-flashing unit, a step-up transformer including at least primary and secondary coils, a switching element that performs a switching operation to control a current supplied to the primary coil, a rectifier diode that rectifies a flyback pulse generated in the secondary coil to supply a charging voltage to the main capacitor, a power-supply-interrupting circuit that selectively interrupts power supplied from the power supply, a full-charge detection unit that detects whether the main capacitor reaches a fully charged state, and a power-supply-control unit that controls the power-supply-interrupting circuit so as to set the power-supply-interrupting circuit to be in an interrupting state. | 2008-10-16 |
20080252231 | LIGHT SOURCE DRIVING DEVICE - A light source driving device for driving a light source module ( | 2008-10-16 |
20080252232 | Magnetic Ballast Fault Isolation System and Method - A magnetic ballast fault isolation system and method, with a fault isolation system including a magnetic ballast | 2008-10-16 |
20080252233 | Universal Line Voltage Dimming Method and System - A universal line voltage dimming method and system, with a control circuit for an electronic ballast including an on-time converter ( | 2008-10-16 |
20080252234 | TRACK LIGHTING SYSTEM CURRENT LIMITING DEVICE - A current limiting system in accordance with the present invention comprises an accessory or canopy mount device that is permanently installed between a source of electrical power | 2008-10-16 |
20080252235 | Electronic Control Gear and Method of its Use - An electronic control gear for a lamp is disclosed. The electronic control gear has a memory device and a microprocessor configured to acquire data relating to at least one parameter of operation of the lamp and configured to store acquired data in the memory device. The at least one parameter of operation is an electrical power consumption of the lamp during a period of operation, a duration of operation of the lamp during a period, a duration of operation the lamp at each of a plurality of power consumption levels or bands, or an operating temperature of a component of a circuit in which the lamp is connected. | 2008-10-16 |
20080252236 | Method and Device Capable of Controlling Soft-start Dynamically - A back light boost converter includes an analog circuit, an enable controller, a logic device, and a digital PWM controller. The analog circuit generates a switch signal and a feedback signal based on a first pulse signal. The enable controller generates an enable signal based on an LED on ratio signal, an LED on cycle signal, a duty cycle signal, and a frequency signal. The logic device generates a second pulse signal based on the feedback signal and the enable signal. The digital PWM controller outputs the first pulse signal with increasing duty cycles in a plurality stages. | 2008-10-16 |
20080252237 | Method for driving a light source, backlight assembly for performing the method and display apparatus having the backlight assembly - In a method for driving a light source, a backlight assembly for performing the method and a display apparatus having the backlight assembly, a light source is driven by an initial power until a first time when initial brightness of the light source decreases to a reference brightness. Then, the light source is driven by a first compensation power after the first time, so that the light source has first compensation brightness. When the brightness of the light source decreases to the reference brightness, a driving power applied to the light source is changed to compensate the brightness of the light source. Thus, the light source is driven to have uniform brightness over an extended length of time. | 2008-10-16 |
20080252238 | MOTOR DRIVE CIRCUIT - A pulse generation unit generates a PWM signal whose duty ratio changes according to a target torque of a motor. A back electromotive detection circuit compares a back electromotive voltage generated at a coil of the motor with a middle point voltage of the coil, and outputs a back electromotive detection signal that becomes high level at a timing of the zero crossing point. A phase adjustment unit compares phases of the back electromotive detection signal and a reference signal that becomes a predetermined level at a predetermined timing, and adjusts the duty ratio of the PWM signal by feedback so that the phase error becomes a minimum. A frequency adjustment unit adjusts the frequency of the PWM signal such that the frequency of the PWM signal becomes integral multiples of the frequency of the back electromotive detection signal. | 2008-10-16 |
20080252239 | METHOD CAPABLE OF CONTROLLING BRUSHLESS DC MOTOR - A method capable of controlling brushless DC motor detects the magnetic pole positions of the rotor with a Hall component to produce a Hall signal correspondingly, generates a PWM signal based on an external control signal with a PWM generator, controls a switch circuit based on the PWM signal and the Hall signal with a driver such that switched output is capable of being sent to the current phase of the stator coils for rotating the rotor. Further, while the Hall signal is detected to be level-switched, the external control signal level increases or decreases corresponding to change of the level of the Hall signal with respect to the duty cycle of the PWM signal being controlled to increase to the preset duty cycle from 0 or to decrease to 0 from the preset duty cycle for eliminating both sharp wave in the current during switching and noise. | 2008-10-16 |
20080252240 | MOTOR DRIVE CIRCUIT AND METHOD - A motor drive method which supplies a drive current in a pulse form to a multiphase motor, to drive the motor. The motor drive method includes the steps of: generating a pulse signal having a duty ratio in accordance with torque, alternately repeating an ON time-period and an OFF time-period in accordance with the pulse signal, to supply a drive current in a pulse form to a phase coil currently driving, interpolating back electromotive voltage of the OFF time-period (Toff), using a back electromotive voltage (Vu) of the ON time-period (Ton), with respect to the back electromotive voltage (Vu) occurring in at least one coil of the multiphase motor, to generate an interpolated virtual back electromotive voltage (Vu′), detecting a zero-cross point, by comparing the interpolated virtual back electromotive voltage (Vu′) with a midpoint voltage (Vcom) of the coil, to generate a BEMF detection signal (BEMF_EDGE), and switching a phase to be driven, based on the BEMF signal (BEMF_EDGE). | 2008-10-16 |
20080252241 | SENSORLESS DRIVING METHOD FOR BRUSHLESS DC MOTOR - A sensorless driving method for a brushless DC motor is provided. The time for the motor to rotate an electrical angle 60° is obtained by alternatively counting the occurrences of zero crossings with two counters and comparing the counted values, and the motor is delayed an electrical angle of 30°, by which a precise commutating time is obtained. The driving method provides a mask-based phase shift digital detection mechanism for effectively detecting true zero-crossing points. The driving method further provides an inhabitation mechanism with the function of soft-switch for inhibiting noise caused by transistor switching. By using these two counters, the time for the motor to rotate two electrical angles 30°−Δθ and 30°+Δθ are obtained and stored in two registers. The time period before and after the commutating point is added into a pulse width modulation (PWM) signal to reduce the noise and vibration. | 2008-10-16 |