06th week of 2009 patent applcation highlights part 18 |
Patent application number | Title | Published |
20090033165 | Magnetic Levitation Actuator - A rotating shaft is accommodated in a case. A ferromagnetic portion is formed on the rotating shaft, and electromagnets are provided to the case. Many projecting portions are formed so as to be arranged in a direction along which the movement of the rotating shaft is required to be regulated. Furthermore, Many projecting portions are likewise formed on the ferromagnetic portion. According to this construction, magnetic flux occurring in the electromagnets concentrates, so that restoring force occurs in the axial direction with suppressing reduction of the attractive force in a radial direction to the ferromagnetic portion. Therefore, the movement in the axial direction of the rotating shaft can be regulated. | 2009-02-05 |
20090033166 | BRUSHLESS MOTOR - The brushless motor includes a stator having a electromagnetic coil and a position sensor; an axis fixed to the stator; and a rotor having a permanent magnet. The rotor rotates around the axis. The rotor is linked to a driven member that is driven by the brushless motor. | 2009-02-05 |
20090033167 | MAGNET SUPPORT AND RETENTION SYSTEM FOR HYBRID ROTORS - Disclosed is a rotor assembly for an electric machine includes a rotor core. The rotor core has at least one magnet slot with an increasing slot width as radial distance from a rotor shaft increases, and at least one slot lip extending at least partially across the slot width. The rotor assembly also includes at least one permanent magnet located in at least one magnet slot, the magnet having an increasing magnet width as radial distance from a rotor shaft increases. The rotor assembly further includes a retainer disposed in the magnet slot radially between the magnet and the at least one slot lip. Also disclosed is a method of securing at least one permanent magnet in a rotor assembly of an electric machine. | 2009-02-05 |
20090033168 | Load Generating Encoder Wheel - A shaft assembly, includes an elongated shaft and a flywheel mounted to an end of the shaft. An encoder is mounted to the shaft and includes an annular support ring having a radially inwardly extending portion and an axially extending portion extending from a radially outer end of the radially inwardly extending portion. The radially inwardly extending portion defines a spring section which is compressed between the flywheel and the end of the shaft, and an encoder material is disposed on the axially extending portion of the annular support ring. | 2009-02-05 |
20090033169 | MAGNETIC STRUCTURE AND MOTOR EMPLOYING SAID MAGNETIC STRUCTURE, AND DRIVER COMPRISING SAID MOTOR - Provided is a small motor superior in weight/torque balance. A phase stator | 2009-02-05 |
20090033170 | Rotor Of An Asynchronous Machine - The invention relates to a rotor of an asynchronous machine with grooves ( | 2009-02-05 |
20090033171 | Continuous direct current generator - A continuous direct current generator comprises a plurality of windings, each being adapted to rotate between two magnetic fields and in unison with a rotator having a plurality of brush contacts. The windings are electrically connected to the brush contacts which deliver current to a split anode-cathode ring within which the rotator rotates. The windings are connected to the brush contacts so as to deliver substantially continuous direct current to the anode-cathode output. | 2009-02-05 |
20090033172 | BRUSH MANUFACTURING METHOD, MOTOR MANUFACTURING METHOD, BRUSH, MOTOR, AND ELECTROMOTIVE POWER STEERING DEVICE - A manufacturing method for a brush that can reduce contact surface area between a commutator and the brush, thereby reducing frictional noise, is provided. Specifically, a method to manufacture a brush, which provides one surface with contact surfaces that make sliding contact with the commutator, involves a step to mold a molded body and a step to cut the molded body. In the molding process, carbon powder containing copper powder is sintered to form a molded body having a groove on the top surface along the direction of the axis of rotation of the commutator, and curved surface margins in the margins of the top surface in the direction of the axis of rotation. In the cutting step, the central part of the top surface of the molded body is cut by a grinding stone along the cutting direction to form contact surfaces between the margins of the top surface. | 2009-02-05 |
20090033173 | MOTOR STATOR WITH LIFT CAPABILITY AND REDUCED COGGING CHARACTERISTICS - A motor includes a stator and a rotor, equipped to be movable in at least a first direction relative to the stator, the rotor operably interfacing the stator so that a motor force is generated in a first direction, where the stator comprises an anti-cogging element configured to generate anti-cogging forces on the rotor in at least the first direction and a second direction at an angle to the first direction. | 2009-02-05 |
20090033174 | BRUSHLESS MOTOR - A brushless motor includes a stator and a rotor. The stator includes an annular stator core having teeth arranged with a spacing in a circumferential direction of the annular stator core; and coils wound around the teeth respectively. The rotor includes a rotor core and magnetic poles of segment magnets arranged annularly along a circumferential direction of the rotor core. The segment magnets are stacked at a plurality of stages in an axial direction of the rotor core. A length direction of each of the segment magnets is parallel with the axial direction of the rotor core. The following expression is satisfied: | 2009-02-05 |
20090033175 | Measuring sensor with at least one saw (surface acoustic wave ) element - A measuring sensor comprises at least one SAW (surface acoustic wave) element ( | 2009-02-05 |
20090033176 | SYSTEM AND METHOD FOR LONG TERM POWER IN WELL APPLICATIONS - A technique is provided by which energy is physically/mechanically transmitted down through a wellbore. The transmitted energy is directed downhole along a fluid channel and impinges on an energy converter positioned in the wellbore or at another subterranean location. The energy converter converts the physical energy into electrical energy that can be supplied to a downhole device. | 2009-02-05 |
20090033177 | THIN FILM PIEZOELECTRIC RESONATOR AND METHOD OF MANUFACTURING THE SAME - A thin film piezoelectric resonator includes a substrate having a cavity; a first electrode extending over the cavity; a piezoelectric film placed on the first electrode; and a second electrode placed on the piezoelectric film, the second electrode having a periphery partially overlapping on the cavity and tapered to have an inner angle of 30 degrees or smaller defined by a part of the periphery thereof and a bottom thereof. | 2009-02-05 |
20090033178 | Movement detector - A movement detector which is rotatably installed on a base member includes a rotating member which has a body portion, and a connecting portion which rotatably connects the body portion to the base member, a piezoelectric layer which is formed on the connecting portion, and a plurality of electrodes which are provided on the piezoelectric layer, to be arranged in a direction of a rotation axis of the body portion, and which detect a voltage generated in the piezoelectric layer corresponding to a deformation of the connecting portion when the body portion has displaced with respect to the base member. Since the piezoelectric layer and the plurality of electrodes are provided to the connecting portion which rotatably connects the body portion to the base member, it is possible to detect a plurality of types of movements of the body portion by the piezoelectric layer and the plurality of electrodes. | 2009-02-05 |
20090033179 | MULTILAYER PIEZOELECTRIC ELEMENT - A multilayer piezoelectric element | 2009-02-05 |
20090033180 | Rotating Electrical Machine - A rotating electrical machine having an RF-IC chip for detecting a rotation and also having a stator and a rotor. When a compact RF-IC chip is used as the RF-IC chip, the chip can detect the rotation of the rotating electrical machine. | 2009-02-05 |
20090033181 | AC generator for vehicles - According to an AC generator for vehicles of the present invention, a terminal mount includes an L-shaped support having a radial extension, in which a metal terminal is contained and which radially extends about a rotary shaft of a rotor, and an axial extension, which extends from an end of the radial extension toward a rear cover along the rotary shaft, and at least one first guide molded integral with the L-shaped support. A radiating fin includes a second guide having a shape corresponding to a shape of the first guide. One of the first guide and the second guide is inserted into the other of the first guide and the second guide. | 2009-02-05 |
20090033182 | Manual generator - A generator includes a base on which a power generating device and a power storage unit is connected. The power generating device includes a shaft with which a gear set is connected. The power storage unit includes an output member which is located at an outside of the casing of the generator. An operation unit includes a crank and a pedal, the crank is connected with the gear set so as to operate the power generating device. By the gear set, the crank needs to be operated few times to make the shaft of the power generating device to rotate by multiple times of the revolutions so as to efficiently generate power. | 2009-02-05 |
20090033183 | Storage and display case - A display and storage case is disclosed. The display and storage case can include a structure having a front, back, top, bottom, left and right sides. Formed into a front side of the structure are a number of cavities of varying size and shape. The display and storage case may be used to store or display bottles or other products in a horizontal or vertical manner. | 2009-02-05 |
20090033184 | Power supply support system and method - An external power supply support system includes an enclosure with indentations spanning its top and side surfaces in a substantially horizontal fashion, and a caddy with a shell-like body configured to engage at least a portion of the indented power supply enclosure. The shell-like caddy body is provided with mounting apertures spaced according to standard rack rail aperture spacing. The mounting apertures emanate from a series of integral structures bulging from the bottom surface of the shell-like caddy body. The bulging aperture structures in combination with several integral structural ribs are configured collectively to provide a substantially flat and elevated interface suitable for secure mounting of the caddy to a support surface. | 2009-02-05 |
20090033185 | Washing Machine - Provided is a washing machine. The washing machine includes a front portion that forms the front of the washing machine and a deco panel. The deco panel is installed around the perimeter of the front portion to cover the front portion. | 2009-02-05 |
20090033186 | ENCLOSURE PROVIDING IMPROVED COOLING FOR A HEAT-GENERATING DEVICE - An enclosure includes interconnected panels defining an internal space. The panels define an air inlet for admitting cooling air to the enclosure and an air outlet for exhausting cooling air from the enclosure. The panels configure the internal space to promote a linear air flow velocity near the inlet (or outlet) that is greater than a respective velocity near the outlet (or inlet) for a given volumetric flow rate of air through the enclosure. A portion of a cover panel may be angularly oriented to define an increasing transverse cross sectional area between the inlet and outlet, to cause air flowing into the enclosure to change in linear velocity as it traverses the enclosure. The cover panel may have separate portions positioned at different heights such that the cross-sectional areas near the outlet and inlet differ. The fan may be angularly oriented for better removal of heated cooling air. | 2009-02-05 |
20090033187 | Auto-returning assembly with mechanical damper - An auto-returning assembly with mechanical damper is used in conjunction with a drawer rail and has a body, a rack, a locking protrusion, at least one spring and a damper. The body has a base and a guiding mount. The guiding mount is formed on the base and has a guide slot. The rack is mounted slidably on the body. The locking protrusion is mounted rotatably on the rack and slidably in the guiding slot and has a pivoting protrusion and a locking post. The at least one spring is connected to the body and the rack. The damper is connected securely to the body and engages the rack and has a casing and a buffering wheel. When the spring pulls the drawer rails back, rack forces the damper wheel to turn that encounters high resistance and slows the movement of the drawer rail. | 2009-02-05 |
20090033188 | COOLING DEVICE, AND CHILLED GOODS SUPPORT THEREOF - A chilled goods support for a cooling device comprising a liquid crystal temperature display unit. A supporting element of said chilled goods support is used as a thermal buffer to which the liquid crystal temperature display unit is fixed in a planar manner. | 2009-02-05 |
20090033189 | Door Actuation Device for Actuating the Door of a Refrigerator/Freezer Cabinet - The present invention is directed to a door actuation device for the actuation of a door of a refrigerator/freezer cabinet having a cabinet body at which at least one door is swivelably arranged. According to the invention, an automatic drive is provided which forms an operative connection between the cabinet body and the door and by which a movement of the door between a closed position and an open position can be carried out. | 2009-02-05 |
20090033190 | Refrigerator door - A refrigerator door includes an outer wall and an inner wall which surround an intermediate space as well as vertical bars that protrude from the inner wall and are provided with catching steps for door shelves. The bars are formed at least in part by a vertical profiled part while the catching steps are embodied on the vertical profiled part. | 2009-02-05 |
20090033191 | REFRIGERATOR - The present embodiment relates to a refrigerator, and more specifically to a refrigerator capable of effectively receiving various kinds of foods in the inside of a basket by selectively shielding a door basket provided at a rear of a refrigerator door and providing a basket cover selectively fixed to an upper end of the door basket or the rear of the door. | 2009-02-05 |
20090033192 | Electric lamp with an outer bulb and an integral lamp arranged in the outer bulb - An electric lamp ( | 2009-02-05 |
20090033193 | HID LAMP WITH FRIT SEAL THERMAL CONTROL - A method of making an HID lamp and an HID lamp that includes a ceramic envelope with a ceramic capillary, wherein the capillary has an electrode feed-through therein that is sealed inside the capillary by a frit seal that extends inside the capillary a first distance from a distal end of the capillary, and a ceramic heat sink around at least half an external diameter of the capillary, wherein the heat sink is separated from the envelope and from the distal end of the capillary and the heat sink is in thermally conductive contact with the capillary and has an external diameter at least 1.5 times the external diameter of the capillary. In one preferred embodiment, the heat sink does not overlap the frit seal. | 2009-02-05 |
20090033194 | PLASMA-GENERATING PLUG - The invention relates to a plasma-generating spark plug which undergoes excitation in the radio frequency domain. The invention comprises at least one first metallic electrode ( | 2009-02-05 |
20090033195 | SPARK PLUG FOR INTERNAL COMBUSTION ENGINE AND METHOD OF MANUFACTURING THE SAME - A spark plug for an internal combustion engine, includes: a cylindrical insulating body; a center electrode; a cylindrical metal shell; and a ground electrode, as defined herein, wherein the noble metal tip is bonded to the ground electrode via a molten bond, and when viewed in a cross-section including a center axis of the noble metal tip along a longitudinal direction of the ground electrode, a sum of a cross-sectional area of a base-end-side molten bond (A) positioned at a base end side of the ground electrode and a cross-sectional area of a front-end-side molten bond (B) positioned at a front end side of the ground electrode is equal to or greater than 4 mm | 2009-02-05 |
20090033196 | Electron emission source, electron emission device and method of preparing the electron emission source - Electron emission sources, electron emission devices including the electron emission sources, and methods of making the electron emission sources are provided. The electron emission source includes a carbon-based material, and a degradation prevention material for preventing degradation of the carbon-based material. A binding energy between the degradation prevention material and external oxygen is greater than a binding energy between the carbon-based material and the external oxygen. The electron emission sources have excellent field emission efficiencies and long lifetimes. | 2009-02-05 |
20090033197 | Energy saving lamp having isolated blub and base structure - An energy saving lamp, containing an isolated bulb set and assembling base, wherein the bulb set is comprised of a main body, a bulb and a lid, and the assembling base is comprised of a main seat, a circular wall, a ballast and a bottom lid. A conductive and assembling structure are provided between said bulb set and the assembling base such that the bulb set and the assembling base can be disassembled and re-assembled freely, thus making it feasible to replace the malfunctioned parts of the lamp, achieving in the purpose of lower cost and reparability. | 2009-02-05 |
20090033198 | Electric lamp with an outer bulb and an integral lamp and a method for its production - The invention relates to an electric lamp ( | 2009-02-05 |
20090033199 | Forming tool for lamp bases - A method of manufacturing a flash-free lamp base ( | 2009-02-05 |
20090033200 | METAL AND OXIDE INTERFACE ASSEMBLY TO SUSTAIN HIGH OPERATING TEMPERATURE AND REDUCE SHALING - The invention relates to a barrier layer provided on the electrode assembly of a discharge lamp comprising at least a layer of nanoclusters of a non-oxidizing material. Further, the invention relates to an electrode assembly for a discharge lamp comprising an electrode having a foil attached thereto to create an electrode assembly, the assembly being coated with a multi-layer coating comprising at least a layer of non-oxidizing material in the form of nanoclusters, and at least another layer of non-oxidizing material, such that the total coating thickness is up to 1500 nm. A method to reduce thermal expansion mismatch between an electrode assembly and a discharge lamp envelope is also provided, the method comprising providing an electrode assembly and depositing on the surface of the assembly a coating having at least a nanocluster layer of a non-oxidizing material, and subsequently subjecting the lamp envelope in the electrode assembly area to pinching to create a pinch area, this lamp being able to operate at elevated temperature for extended periods, in excess of 1000 hours. | 2009-02-05 |
20090033201 | COMPLEX OXYNITRIDE PHOSPHOR, LIGHT-EMITTING DEVICE USING SAME, IMAGE DISPLAY, ILLUMINATING DEVICE, PHOSPHOR-CONTAINING COMPOSITION AND COMPLEX OXYNITRIDE - To provide a green phosphor with high conversion efficiency of blue of near-ultraviolet light and excellent color purity, a multinary oxynitride phosphor represented by the general formula [I] is proposed. | 2009-02-05 |
20090033202 | Image Display Device - An exhaust hole ( | 2009-02-05 |
20090033203 | IMAGE FORMING APPARATUS AND LIGHT EMITTER SUBSTRATE - To provide an image forming/displaying apparatus which can achieve high image quality and high reliability, the image forming/displaying apparatus comprises a rear plate having plural electron-emitting devices; and a face plate arranged oppositely to the rear plate. The face plate has plural light emission films for emitting light in response to irradiation of electrons, and black members for mutually separating the plural light emission films from others. The plural light emission films are arranged so that the adjacent light emission films emit light of mutually different colors. Further, a convex member, which projects from the surface of the light emission film, is provided within the area of each light emission film. | 2009-02-05 |
20090033204 | WHITE LIGHT LED - A white light LED is disclosed. The white light LED includes a dual-wavelength chip and an optical thin film. The dual-wavelength chip generates a first wavelength light and a second wavelength light. The optical thin film is disposed above the dual-wavelength chip. The optical thin film can partially be a quantum well thin film. Therefore, the quantum well thin film can be excited by the first wavelength light and/or second wavelength light to generate a third wavelength light. The optical thin film further comprises a plurality of windows to let the first and second wavelength lights pass through. By predetermining a ratio of the quantum well thin film area and the window area that belong to the optical thin film, a lumen ratio of the first, the second, and the third wavelength lights can be adjusted to realize white lights of different color temperatures. | 2009-02-05 |
20090033205 | Light emission device and display having the same - A light emission device and a display having the light emission device are provided. The light emission device includes first and second substrates arranged opposite to each other, an electron emission unit provided on the first substrate, a light emission unit provided on the second substrate, and spacers that are supportably disposed between the first and second substrates. The spacers are formed in a pillar configuration and each side of the spacers is arranged at an acute angle with respect to an edge of driving electrodes of the electron emission unit. | 2009-02-05 |
20090033206 | Graded Junction Silicon Nanocrystal Embedded Silicon Oxide Electroluminescence Device - A silicon (Si) nanocrystal embedded Si oxide electroluminescence (EL) device and associated fabrication process are presented. The method provides a substrate bottom electrode, and forms a plurality of Si nanocrystal embedded SiOx film layers overlying the bottom electrode, where X is less than 2. Each SiOx film layer has a Si excess concentration in a range of about 5 to 30%. The outside film layers sandwich an inner film layer having a lower concentration of Si nanocrystals. Alternately stated, the outside Si nanocrystal embedded SiOx film layers have a higher electrical conductivity than a sandwiched inner film layer. A transparent top electrode is formed over the plurality of Si nanocrystal embedded SiOx film layers. The plurality of Si nanocrystal embedded SiOx film layers are deposited using a high density plasma-enhanced chemical vapor deposition (HD PECVD) process. The HD PECVD process initially deposits SiOx film layers, which are subsequently annealed. | 2009-02-05 |
20090033207 | High Quantum Efficiency Silicon Nanoparticle Embedded SiOxNy Luminescence Device - A method is provided for fabricating a high quantum efficiency silicon (Si) nanoparticle embedded SiO | 2009-02-05 |
20090033208 | FILM FORMING COMPOSITION AND ORGANIC ELECTROLUMINESCENT DEVICE - A film-forming composition that attains an improvement in the solubility of a hole-injecting/transporting material and/or an electron-accepting compound and has a drying rate appropriate for stable formation of a uniform coating film, being suitable for the formation of a hole-injecting/transporting layer. This composition comprises a hole-injecting/transporting material and/or an electron-accepting compound and a liquid in which the hole-injecting/transporting material and/or the electron-accepting compound are dissolved. This liquid mainly contains a solvent whose molecule has an aromatic ring and/or an aliphatic ring and an oxygen atom and which has either a boiling point of at least 200° C. or a vapor pressure of 1 torr or lower at 25° C. | 2009-02-05 |
20090033209 | Organometallic Complex, And Light Emitting Device And Electronic Appliance Using the Same - In a general formula ( | 2009-02-05 |
20090033210 | COMPOUND AND ORGANIC LIGHT EMITTING DEVICE - To provide a novel fluoranthene derivative and an organic light emitting device having the fluoranthene derivative. | 2009-02-05 |
20090033211 | ORGANIC LIGHT EMITTING DEVICE ARRAY - The present invention has an object to provide an organic light emitting device array whose power source voltage is not raised. The difference in ionization potential between a host material and a hole transport layer and the difference in electron affinity between a host material and of an electron transport layer are set in a favorable range for all organic light emitting devices which emit light of different colors. | 2009-02-05 |
20090033212 | WHITE ORGANIC LIGHT EMITTING DEVICE - Provided is a white organic light emitting device including an anode, a cathode and an organic layer disposed therebetween, the organic layer having a structure wherein an arrangement of a green emissive layer and a blue emissive layer is formed on both surfaces of a red emissive layer such that the resultant structure is symmetrical around the red emissive layer, and a spacer layer is disposed between opposing surfaces of the blue emissive layer and the green emissive layer, where the white organic light emitting device including this structure exhibits a constant luminescence spectra irrespective of any change in current density. A method of forming the white organic light emitting device is also disclosed. | 2009-02-05 |
20090033213 | Organic Electroluminescent Element, Displaying Device and Lighting Device - This invention provides an organic electroluminescent element comprising a substrate and an electrode and one or more organic layers provided on the substrate. The organic electroluminescent element is characterized in that the layer density of at least one of the organic layers is 1.10 to 1.25 g/cm | 2009-02-05 |
20090033214 | Display Devices - A light-emissive device comprising: a light-emissive region ( | 2009-02-05 |
20090033215 | ORGANIC EL DISPLAY APPARATUS - Provided is an organic EL display apparatus which can prevent, moisture in a planarizing film or outside moisture intruding into the planarizing film, from intruding into a light-emitting portion through a cracked portion of an insulating film, thereby suppressing peripheral degradation. The organic EL display apparatus includes a substrate, an insulating film formed on the substrate and having a plurality of openings at equal intervals, and a plurality of organic EL devices formed in the openings on the substrate and each constituting a light-emitting portion, in which the organic EL layer is formed on an inner side than the opening located at an outermost periphery, and in which in the opening located at an outer periphery of the organic EL layer, a layer which is the same as the first electrode and the second electrode are in contact with each other. | 2009-02-05 |
20090033216 | ORGANIC ELECTROLUMINESCENT DEVICE - An organic electroluminescent device including an organic green emission layer comprising a green emission material and a blue emission material. The green emission layer is interposed between a pair of electrodes. | 2009-02-05 |
20090033217 | ACTIVE MATRIX ORGANIC LIGHT EMITTING DIODE DISPLAY DEVICE AND STRUCTURE OF SUCH DEVICE - An AMOLED display device includes a substrate, a device layer, a flat layer, a first, a second, and a third color filter layers, a first, a second, and a third pixel electrodes, a first, a second and a third organic light emitting layers. The device layer on the substrate includes active devices. The flat layer on the device layer includes contact window openings. The first color filter layer on the flat layer has a first pixel area and a first opening configured above a part of the contact window openings. The second color filter layer on the flat layer has a second pixel area and a second opening configured above a part of the contact window openings. The third color filter layer on the flat layer has a third pixel area and a third opening configured above a part of the contact window openings. | 2009-02-05 |
20090033218 | RED ORGANIC ELECTROLUMINESCENCE ELEMENT - Provided is an organic electroluminescence device in which a single or a plurality of thin organic layers including at least a light emitting layer are sandwiched between an anode and a cathode. At least one of the thin organic layers includes: (A) a perylene compound having at least one halogen atom in its molecule; and (B) a compound having a fused aromatic ring having a ring carbon atoms of 12 to 15. The organic EL device has a high luminous efficiency and a long lifetime and is capable of emitting light having a color range of from an orange color to a red color. | 2009-02-05 |
20090033219 | Electric lamp with an outer bulb and an integral lamp with a method for its production - The invention relates to an electric lamp ( | 2009-02-05 |
20090033220 | Conductive composition for black bus electrode, and front panel of plasma display panel - The black bus electrode of plasma display panel is formed from a conductive composition comprising a conductive powder, glass powder, organic binder, organic solvent, and black pigment, wherein the conductive powder comprises an alloy of at least two metals selected from the group of Ru, Rh, Pd, Ag, Os, Ir, Pt and Au. | 2009-02-05 |
20090033221 | Circuit board assembly and plasma display apparatus including the same - A circuit board assembly including: a circuit board; a plurality of circuit devices disposed on the circuit board; a plurality of heat sinks installed to contact with the circuit devices; and a support member connecting the adjacent heat sinks. The neighboring heat sinks have two facing surfaces, and the support member contacts at least a corner of one of the facing surfaces and at least a corner of the other one of the facing surfaces, so that the bending of the circuit board can be prevented. | 2009-02-05 |
20090033222 | PLASMA DISPLAY DEVICE - In a plasma display apparatus of the preset invention, an external light shielding sheet configured to shield externally incident light to the greatest extent possible is disposed at the front, thus effectively implementing a black image and improving the bright and dark room contrast. Furthermore, pattern units of the external light shielding sheet are formed using a conductivity material. Accordingly, there is an advantage in that EMI emitted from a panel can be prevented from being radiated to the outside. | 2009-02-05 |
20090033223 | CONDUCTIVE FILM, ELECTRON EMITTING DEVICE AND IMAGE DISPLAY APPARATUS - A conductive film of thickness of from 3 nm to 50 nm made from a metal or ally formed on a substrate, wherein the ratio of density thereof to bulk density of the metal or alloy is from 0.2 to 0.5, and the ratio of resistivity thereof to bulk resistivity of the metal or alloy is from 100 to 100000. | 2009-02-05 |
20090033224 | Plasma display panel and method of manufacturing the same - A plasma display panel and a method of manufacturing the plasma display panel are provided. The plasma display panel includes: a plurality of substrates including a first substrate and a second substrate disposed to face the first substrate; a plurality of barrier ribs disposed between the first substrate and the second substrate and defining a plurality of discharge spaces; a plurality of discharge electrodes disposed between the first substrate and the second substrate; phosphor layers formed in the discharge spaces; and an external light shield layer formed inside the substrates. | 2009-02-05 |
20090033225 | Circuit board connection structure and plasma display apparatus including the same - A plasma display apparatus includes a panel assembly, the panel assembly including a plurality of discharge electrodes and a plurality of discharge cells between two substrates, a circuit board having a plurality of circuit terminals and a photoresist layer, the circuit terminals being arranged into a plurality of terminal groups, each terminal group including a plurality of circuit terminals, and the photoresist layer being between the circuit terminals and including at least one dummy groove, a connection member on the circuit terminals and on the photoresist layer, and at least one signal transmitting unit connecting the circuit board to the panel assembly, the signal transmitting unit being attached to the circuit terminals via the connection member. | 2009-02-05 |
20090033226 | Plasma display panel (PDP) and method of aligning the PDP - Provided are a plasma display panel (PDP) and a method of aligning the PDP. The PDP includes a plurality of substrates that include a first substrate and a second substrate, the second substrate arranged opposite to the first substrate, a plurality of discharge electrodes that are arranged between the first and second substrates, a barrier rib structure that is interposed between the first and second substrates and partitions a discharge space between the first and second substrates, phosphor layers that are coated on the discharge spaces, and a plurality of alignment mark portions that are formed on inside surfaces of the first and second substrates and provide a basis for aligning the discharge electrodes and the barrier rib structure. The alignment marks include a plurality of discharge electrode alignment mark portions and a barrier rib alignment mark portion that are formed on inside surfaces of the substrates. The discharge electrode alignment mark portions and the barrier rib alignment mark portion are collected at an identical location, so that accurate alignment is possible. | 2009-02-05 |
20090033227 | MERCURY FREE COMPOSITIONS AND RADIATION SOURCES INCORPORATING SAME - A radiation source is presented, the source comprising an ionizable mercury-free composition that comprises tin halide such that the halide to tin ratio is greater than 2. | 2009-02-05 |
20090033228 | POWER SUPPLY APPARATUS AND HIGH-FREQUENCY CIRCUIT SYSTEM - A power supply apparatus for a traveling-wave tube includes an electrical discharge switch and a first resistor that are serially connected, and that are connected between a cathode electrode and a first collector electrode; N (N denotes a positive integer) arresters that are serially connected, and that are inserted between a ground potential and a connection node of the electrical discharge switch and the first resistor; N second resistors that are inserted between the N arresters and a second collector electrode to an Nth collector electrode and a ground potential, respectively; and an electrical discharge control circuit that turns off the electrical discharge switch at a time of normal operation of the power supply apparatus and turns on the electrical discharge switch when stopping operation of the power supply apparatus. | 2009-02-05 |
20090033229 | MANUFACTURING METHOD FOR LUMINOUS BODY, LUMINOUS BODY, AND LIGHT-EMITTING APPARATUS - In a high luminance, long-life luminous body, a method for manufacturing the luminous body, and a light-emitting apparatus according to the present invention, an inorganic EL device, which is formed by stacking a back electrode, a dielectric layer, a luminescent layer, a dielectric layer, and a transparent electrode in that order, is used. An activator containing Pr, Mn, and Au is mixed into a base material comprised of strontium sulfide (SrS) and the resulting mixture is heated to activate the base material. Then GaAs and InP are added to the mixture, following which the mixture thus prepared is baked in a nitrogen atmosphere containing sulfur gas to produce the luminous body. By mixing the luminous body thus prepared and an ultraviolet curing dielectric substance, the luminescent layer can be obtained. | 2009-02-05 |
20090033230 | LIGHT EMITTING DEVICE - It is an object of the invention to provide a light emitting device in which burden on a light emitting element having low luminous efficiency is relieved, and the deterioration of a light emitting element, the reduction in color reproduction due to the deteriorated light emitting element, and increase in electric power consumption can be suppressed. A light emitting device according to the invention has light emitting elements each of which emits one of colors corresponding to three primary colors. Further, one feature of the light emitting device according to the invention has a light emitting element which emits a neutral color. The light emitting device according to the invention has a structure in which a plurality of pixels having light emitting elements each of which emits one of colors corresponding to three primary colors, and a light emitting element which emits a neutral color as one group, are arranged. | 2009-02-05 |
20090033231 | Flat Panel Display - A high-speed flat panel display having a long lifetime. Thin film transistors in a pixel portion having a plurality of pixels are contacted differently from thin film transistors in driving circuit portions for driving the pixels, thereby enhancing luminance uniformity and reducing power consumption. The thin film transistors each have a channel region and a body contact region for applying a predetermined voltage to the channel region. At least one thin film transistor in the pixel portion is a source-body contact thin film transistor having the body contact region connected to one of source and drain electrodes so that the predetermined voltage can be provided to the channel region. Each thin film transistor in the driving circuit portion is a gate-body contact thin film transistor having the body contact region connected to the gate electrode so that a predetermined voltage can be provided to the channel region. | 2009-02-05 |
20090033232 | PLASMA DISPLAY AND VOLTAGE GENERATOR THEREOF - A plasma display device including a plasma display panel (PDP), a temperature detector for detecting temperature of the PDP, a driver for applying a driving voltage to a scan electrode, and a controller for generating a control signal to control the driver according to the temperature. The driver includes a transistor and first and second resistors. The transistor is coupled between a first power source and the scan electrode. The first power source supplies a scan voltage to the scan electrode. At least one of the first resistor and the second resistor is a variable resistor having a resistance that varies according to the control signal of the controller. A low discharge due to high temperature can be reduced or prevented, and the number of power sources of the plasma display device can be reduced. | 2009-02-05 |
20090033233 | Plasma display and its driver and driving method thereof - A plasma display includes an electrode, a first switch, a second switch, a third switch, an inductor, and a diode. The first switch is coupled to the electrode. The second switch is coupled between the electrode and a first power source to supply a first voltage. The third switch is coupled between the electrode and a second power source to supply a second voltage. The inductor is coupled between a second terminal of the first switch and a third power source to supply a third voltage. The diode is coupled in parallel with the inductor. The first switch includes a first and second transistors coupled in series, the first and second transistors being coupled back-to-back. | 2009-02-05 |
20090033234 | ILLUMINATING LAMP FOR A DISPLAY DEVICE, AN ILLUMINATING DEVICE FOR A DISPLAY DEVICE, AND A DISPLAY DEVICE - An illuminating lamp for a display device is capable of minimizing a luminance difference between a high-voltage driving side and a low-voltage driving side. The illuminating lamp is arranged behind a display panel via optical sheets and driven in a high-voltage driving method. The illuminating lamp includes discharge lamps connected in series, wherein gas pressures of the discharge lamps at a high-voltage driving side are set to be higher than those of the discharge lamps at a low-voltage driving side. | 2009-02-05 |
20090033235 | System & Method for Current and/or Temperature Control of Light Fixtures | 2009-02-05 |
20090033236 | Programmed ballast with resonant inverter and method for discharge lamps - A ballast having a rapid inverter frequency control circuit that is used for programmed operation during lamps starting, during normal operation of all lamps and during no lamp(s) operation. A method and circuit controls frequency shift via a combination of different feedback circuits. A control signal for the inverter controller is synthesized as a sum of phase shifted inverter output voltage feedback signal and lamp current sense signal indicating status of each lamp connected to the ballast output. | 2009-02-05 |
20090033237 | FLUORESCENT TUBE POWER SUPPLY AND BACKLIGHT - A fluorescent tube power supply including a rectification circuit, a smoothing circuit, an inverter, and a control circuit for controlling the inverter, further includes a current detecting unit for detecting an input current of the inverter. The control circuit is stopped based on an output signal of the current detecting unit when the input current increases. | 2009-02-05 |
20090033238 | IGNITION AND OPERATION OF ELECTRONIC HIGH INTENSITY DISCHARGE LAMPS - A method for igniting and operating a high intensity discharge (HID) lamp using an electronic ballast controlled by a ballast microcontroller. An ignition circuit including a parallel capacitive circuit is connected in parallel to the HID lamp. The ignition circuit being resonant at an ignition resonance frequency. An ignition voltage is provided to the HID lamp at the ignition resonance frequency, thereby initiating ignition of the HID lamp. Upon sensing the ignition, the HID lamp is powered at an operation frequency. Both the ignition resonance frequency and the operation frequency are in a high frequency range above fifty kilohertz. The ignition voltage preferably does not include a significant direct current offset The current flowing through the HID lamp is substantially continuous during the transition from providing ignition voltage during the ignition to powering the HID lamp at the operation frequency. | 2009-02-05 |
20090033239 | LIGHTING CONVERSION SYSTEM - An adapter for a T12 fluorescent light fixture that is used to convert the fixture into a T5 or T8 fixture. The adapter includes a male input for receiving power supplied by the T12 ballast. The adapter has circuitry that adjusts the power supplied by the T12 ballast to parameters usable by a T5 or T8 fluorescent lamp. Also, the adapter includes a female output for outputting the usable power from the circuitry. The usable power drives the T5 or T8 fluorescent lamp. | 2009-02-05 |
20090033240 | Electrodeless lamp and core having indented coil winding section for use with tubular lamp envelope - An electrodeless lamp assembly includes a tubular lamp envelope, at least one core having a closed-loop body disposed so as to surround a core mounting portion of the tubular lamp envelope. The core includes an indented coil winding section formed by an indentation formed in an inner side section of the closed-loop body adjacent to a centrally located opening. The electrodeless lamp assembly further includes an induction coil wounded around the indented coil winding section of the core. | 2009-02-05 |
20090033241 | Light emitting diode module and driving apparatus - A driving apparatus for driving a light emitting diode (LED) unit with a positive and a negative driving ends is provided. The driving apparatus includes first, second, and third rectifying units for driving the LED unit to illuminate respectively in response to the first, the second, and the third phase signals of an input signal. The first, the second, and the third rectifying units have the same circuit structure. Let the first rectifying unit be taken for example. The first rectifying unit includes first and second high breakdown-voltage diodes. The P end of the first high breakdown-voltage diode and the N end of the second high breakdown-voltage diode are connected for receiving the first phase signal; the N end of the first high breakdown-voltage diode and the P end of the second high breakdown-voltage diode are respectively connected to the negative and the positive driving ends. | 2009-02-05 |
20090033242 | COIL COMPONENT AND DISPLAY DEVICE USING SAME - The coil component comprises a primary coil, and a first secondary coil and a second secondary coil which are opposed to the primary coil. A first terminal is a terminal of the first secondary coil, that is a terminal for connection to one end of a lamp, and a second terminal is a terminal of the second secondary coil, that is a terminal for connection to the other end of the lamp. The first secondary coil and the second secondary coil are coaxially disposed, and the first terminal and the second terminal are reverse in polarity. | 2009-02-05 |
20090033243 | LED Controller IC Using Only One Pin to Dim and Set a Maximum LED Current - An LED driver IC is described that uses a single pin to both set the maximum current through one or more driven LEDs and variably control the brightness of the LEDs. A single resistor is connected to the control pin of the IC, where the value of the resistor sets the maximum current through the LEDs. A PWM source, outputting a pulse train at a particular duty cycle, is connected to the other end of the resistor, where the duty cycle controls the LED brightness level. When the PWM signal is low (e.g. ground), a sample and hold circuit connects the output of a feedback control voltage to an Imax current source to set a maximum current based on the external resistor value. An inverse of the duty cycle of the PWM controller controls a current Idim that is subtracted from the maximum current Imax set by the resistor. This difference current is used to control drivers for the LEDs. | 2009-02-05 |
20090033244 | INTEGRATED CIRCUIT WITH A PREHEAT CONTROL FOR A BALLAST - The present invention provides a ballast with preheat function for fluorescent or compact fluorescent lamps. The lamp is connected in series with an inductor and a capacitor to form a resonant circuit. A first switch and a second switch controlled by control circuit are coupled to the resonant circuit for switching the resonant circuit. A RC circuit is composed of a first resistor and a second resistor connected in series to form a voltage divider, and a capacitor is connected in parallel with second resistor. Switching frequency is voltage dependent. | 2009-02-05 |
20090033245 | LIGHT EMITTING DIODE LAMP AND ILLUMINATION SYSTEM - A light emitting diode (LED) lamp electrically connected to a switch is provided. The LED lamp includes a lamp body, an LED array disposed inside the lamp body, and a current control circuit disposed inside the lamp body. The current control circuit is electrically connected between the LED array and the switch. The current control circuit is capable of outputting various driving currents to the LED array according to the number of flashing times of the switch, so as to modulate the intensity of light emitted from the LED array. Since the above-mentioned LED lamp has the built-in current control circuit, users are capable of modulating the intensity of light emitted from the above-mentioned LED lamp by flashing the switch. | 2009-02-05 |
20090033246 | LIGHT EMITTING DIODE LAMP - A light emitting diode (LED) lamp includes a lamp body, a current control circuit, and an LED array disposed inside the lamp body. The LED array is electrically connected to the current control circuit. The LED array includes a carrier, a plurality of first LEDs disposed on the carrier for emitting a first light, and a plurality of second LEDs disposed on the carrier for emitting a second light. The first light and the second light have a same color but different color temperatures. The above-mentioned LED lamp provides lights with different color temperatures. | 2009-02-05 |
20090033247 | Electrical Wiring Device with a Center Nightlight Having Automatic and Manual Control Features - The present invention is directed to a electrical wiring device that includes a housing having a plurality of line terminals. A cover assembly is coupled to the housing, the cover assembly including at least one set of receptacle openings disposed on either side of a central portion of the cover assembly. A plurality of receptacle terminals are disposed in the housing, each of the plurality of receptacle terminals being coupled to a corresponding one of a plurality of load terminal structures. Each of the plurality of receptacle terminals is in communication with a corresponding one of the at least one set of receptacle openings. A light assembly is disposed in the central portion of the cover assembly and coupled to the plurality of line terminals or the plurality of load terminals. The light assembly has a light transmission region disposed in the central portion. The light transmissive region occupies a substantial portion of a width of the cover assembly. An automatic control mechanism is coupled to the light assembly and configured to selectively drive the light assembly from a deenergized state to a light emitting state in response to a predetermined stimulus. A manual control mechanism is coupled to the light assembly and configured to selectively regulate the amount of light transmitted by the light assembly when in the light emitting state. | 2009-02-05 |
20090033248 | Thermal Foldback For A Lamp Control Device - The output current of a ballast is dynamically limited when an over-temperature condition is detected in the ballast according to one of (i) a step function or (ii) a combination of step and continuous functions, so as to reduce the temperature of the ballast while continuing to operate it. | 2009-02-05 |
20090033249 | Method and apparatus for the acceleration and manipulation of charged particles - A magnetic field crosses non-uniform rotating electric radial fields which are generated between a central electrode and a series of circumferential outer electrodes. Synchronous charging and partial discharging is applied to the outer electrodes, generating a rotating non-axisymmetric field. Charged particles may then be accelerated and held in a circular orbit, regulated by the magnitude and frequency of the charging of the electrodes, with a radius given by Bqwr=Eq+mw | 2009-02-05 |
20090033250 | Power unit - A power unit which makes it possible to reduce power transmitted from a prime mover to a driven part via an electrical path, to thereby increase the efficiency of driving the driven part. A first rotating machine of the power unit inputs and outputs energy between a stator and first and second rotors thereof, via magnetic circuits formed by generation of a rotating magnetic field, and the rotating magnetic field, and the rotors rotate while maintaining a linear relation in which respective differences in rotational speed between the rotating magnetic field and the second rotor, and between the second and first rotors are equal. The rotors are mechanically connected to a prime mover and a transmission, respectively. A second rotating machine of the power unit is mechanically connected to a drive part without via the transmission, and electrically connected to the stator. | 2009-02-05 |
20090033251 | SERIES-COUPLED TWO-MOTOR DRIVE USING DOUBLE-ENDED INVERTER SYSTEM - Systems and apparatus are provided for an inverter system for use in a vehicle. The inverter system comprises a six-phase motor having a first set of three-phase windings and a second set of three-phase windings and a three-phase motor having a third set of three-phase windings, wherein the third set of three-phase windings is coupled to the first set of three-phase windings and the second set of three-phase windings. The system further comprises a first energy source coupled to a first inverter adapted to drive the six-phase motor and the three-phase motor, wherein the first set of three-phase windings is coupled to the first inverter, and a second energy source coupled to a second inverter adapted to drive the six-phase motor and the three-phase motor, wherein the second set of three-phase windings is coupled to the second inverter. A controller is coupled to the first inverter and the second inverter. | 2009-02-05 |
20090033252 | DOUBLE ENDED INVERTER SYSTEM FOR A VEHICLE HAVING TWO ENERGY SOURCES THAT EXHIBIT DIFFERENT OPERATING CHARACTERISTICS - A double ended inverter system for an AC electric traction motor of a vehicle is disclosed. The inverter system serves as an interface between two different energy sources having different operating characteristics. The inverter system includes a first energy source having first operating characteristics associated therewith, and a first inverter subsystem coupled to the first energy source and configured to drive the AC electric traction motor. The inverter system also includes a second energy source having second operating characteristics associated therewith, wherein the first operating characteristics and the second operating characteristics are different, and a second inverter subsystem coupled to the second energy source and configured to drive the AC electric traction motor. In addition, the inverter system has a controller coupled to the first inverter subsystem and to the second inverter subsystem. The controller is configured to influence operation of the first inverter subsystem and the second inverter subsystem to manage power transfer among the first energy source, the second energy source, and the AC electric traction motor. | 2009-02-05 |
20090033253 | ELECTRIC TRACTION SYSTEM FOR A VEHICLE HAVING A DUAL WINDING AC TRACTION MOTOR - An electric traction system for a vehicle having a high voltage battery and a low voltage battery is provided. The system includes an AC electric motor and a double ended inverter system coupled to the AC electric motor. The AC electric motor has a first set of windings and a second set of windings that occupy common stator slots, where the first set of windings and the second set of windings are electrically isolated from each other. The double ended inverter system drives the AC electric motor using energy obtained from the high voltage battery and energy obtained from the low voltage battery. The double ended inverter system utilizes a first inverter subsystem coupled between the first set of windings and the high voltage battery, and a second inverter subsystem coupled between the second set of windings and the low voltage battery. | 2009-02-05 |
20090033254 | DOUBLE ENDED INVERTER SYSTEM WITH A CROSS-LINKED ULTRACAPACITOR NETWORK - A double ended inverter system for an AC traction motor of a vehicle includes a fuel cell configured to provide a DC voltage, an impedance source inverter subsystem coupled to the fuel cell, a DC voltage source, and an inverter subsystem coupled to the DC voltage source. The impedance source inverter subsystem, which includes an ultracapacitor, is configured to drive the AC traction motor. The inverter subsystem is configured to drive the AC electric traction motor. The ultracapacitor is implemented in a crossed LC network coupled to the fuel cell. | 2009-02-05 |
20090033255 | CHARGING ENERGY SOURCES WITH A RECTIFIER USING DOUBLE-ENDED INVERTER SYSTEM - Systems and methods are provided for charging energy sources with a rectifier using a double-ended inverter system. An apparatus is provided for an electric drive system for a vehicle. The electric drive system comprises an electric motor configured to provide traction power to the vehicle. A first inverter is coupled to the electric motor and is configured to provide alternating current to the electric motor. A first energy source is coupled to the first inverter, wherein the first inverter is configured to provide power flow between the first energy source and the electric motor. A second inverter is coupled to the electric motor and is configured to provide alternating current to the electric motor. A rectifier is coupled to the second inverter and configured to produce a direct current output. The second inverter is configured to provide power from the rectifier to the electric motor. | 2009-02-05 |
20090033256 | Powered opening and closing system for vehicle's door - A powered opening and closing system includes a door supported on a vehicle body, a motor, a drive mechanism for moving the door in opening and closing directions by virtue of power of the motor, an operation detecting sensor for detecting a handle operation when-the door is operated to open or close, and a control circuit for prohibiting the operation of the drive mechanism when a predetermined operation prohibiting condition is detected. The drive mechanism brakes the movement of the door by putting the clutch in an engaged state while the motor is kept stopped. While the predetermined operation prohibiting condition is detected, the control circuit controls the clutch to be engaged while keeping the motor stopped when an opening of the door is detected, and controls the clutch to be disengaged when an operation of the handle is detected by the operation detection sensor. | 2009-02-05 |
20090033257 | Voltage Control of Upconverter in a Motored Vehicle Drive - When an ECU receives a transmission signal having a high level from a transmission, the ECU exerts torque reduction control to reduce a torque control value for a motor generator. Furthermore the ECU sets an optimum (or target) value of a voltage as based on the torque control value and a motor rotation speed and controls an upconverter. Herein, when the transmission is shifting gears, the ECU controls the upconverter to allow the voltage to be constant regardless of whether the torque reduction control is exerted to reduce the torque control value. | 2009-02-05 |
20090033258 | MOTOR CONTROLLER - A motor controller for an axial-gap motor permits a reduced size of the entire system of including a drive circuit and a power source of the motor, reduced cost, and higher reliability to be achieved by controlling the energization mode of the motor. The motor controller has a torque command determiner which inputs a first DC voltage to a first inverter at least either when a rotor is at a halt or when the number of revolutions of the rotor is a predetermined number of revolutions or less, supplies a field axis current for changing the magnetic flux of a field of the rotor to a first stator from the first inverter such that the amount of energization is temporally changed, converts an induced voltage developed in a second stator by the supplied field axis current into a second DC voltage by a second inverter, and outputs the second DC voltage, thereby charging a second battery. | 2009-02-05 |
20090033259 | METHOD OF ESTIMATING THE STATE OF A SYSTEM AND RELATIVE DEVICE FOR ESTIMATING POSITION AND SPEED OF THE ROTOR OF A BRUSHLESS MOTOR - A method for estimating the state of a system, as well as an extended Kalman filter (EKF), allows nonlinear mathematical models to be used for describing the system. Accurate precision is provided since the method is based on an EKF technique while using a filter that implements a first degree Stirling approximation formula. The method may be used for estimating position and speed of a brushless motor, and may be implemented in a relative device. Such a device may be introduced in a control loop of a brushless motor of a power steering system for a vehicle to provide a countering torque on the steering wheel based on speed of the vehicle and a steering angle of the vehicle. | 2009-02-05 |
20090033260 | Method and device for controlling a brushless direct-current motor - Presented in an apparatus for controlling a brushless DC motor with a permanent magnet arranged on a rotor and a stator with windings. The apparatus includes an observer that is adapted to determine an estimated temperature of the permanent magnet as a function of the temperature of the windings, and determine at least one actuating signal for controlling the DC motor as a function of the estimated temperature of the permanent magnet. | 2009-02-05 |
20090033261 | SYSTEM AND METHOD FOR CONTROLLING A SYNCHRONOUS ELECTRIC MOTOR, PARTICULARLY FOR HOUSEHOLD APPLIANCES - The system (ECS) comprises a rectifier circuit (RC) to supply a direct current voltage (VB) as output; a driver circuit (DC) which is connected to a rectifier circuit (RC) and includes a plurality of controlled switches (SW | 2009-02-05 |
20090033262 | Sensorless controlling apparatus of brushless motor - A sensorless controlling apparatus for controlling a brushless motor includes a speed calculator for calculating speed of a rotor ω, an angle calculator for calculating rotor angle θ at a predetermined time interval, and an angle controller for calculating correction angle Δθ based on the current value of a d-axis current (d-axis current value i | 2009-02-05 |
20090033263 | METHOD AND RELATED CIRCUIT FOR DRIVING A SENSORLESS BRUSHLESS MOTOR - A method of driving a sensorless brushless motor in PWM mode includes tristating a winding during a time window for detecting a zero-cross of the back electromotive force induced in the winding by rotation of a rotor, monitoring voltage of the tristated winding during an unmasked portion of the time window, and detecting during the time window a zero-cross event of the induced back electromotive force. The method includes verifying whether the zero-cross event occurred during the unmasked portion, modifying for the next cycle the duration of the time window and/or of the unmasked portion thereof based upon the verification, defining a safety interval in the unmasked time window, modifying the duration of the time window and/or of the unmasked portion thereof depending on whether the zero-cross event has been detected during the safety interval. | 2009-02-05 |
20090033264 | Method and device for determining a gradient-limited cumulative setpoint torque from a setpoint torque of a closed-loop speed control - In a method for determining a gradient-limited setpoint torque from a requested setpoint drive torque and a controller setpoint torque of a closed-loop speed control, the gradient of an unlimited cumulative setpoint torque, which is a function of the requested setpoint drive torque and the controller setpoint torque of the closed-loop speed control, is limited in a region of the zero crossing of the gradient-limited setpoint torque by a rate-of-change limitation to a maximally permitted or a minimally permitted value. The maximally permitted or the minimally permitted value of the rate-of-change limitation is a function of the controller setpoint torque of the closed-loop speed control. | 2009-02-05 |