Patents Issued in March 20, 2003
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Publication number: 20030053286Abstract: A dielectric oxide film is formed on the surface of a valve metal plate formed of aluminum and a conductive polymer layer is provided so as to cover the valve metal plate and the dielectric oxide film. The conductive polymer layer is formed of polyaniline having para-toluenesulfonic acid as a dopant. A conductive carbon paste layer and a silver paste layer are provided at the outer side of the conductive polymer layer and a metal plate, comprising a copper foil, is overlapped onto the silver paste layer. Anode lead terminals are connected to the ends of the valve metal plate and the respective end parts of the metal plate are arranged as cathode lead terminals. A shield strip line device, which is low in impedance, especially in high-frequency ranges of 100 MHz or more, and is favorably adapted to high speed and high frequencies, mainly for use as a bypass device for a noise filter or as a decoupling device, is thus obtained.Type: ApplicationFiled: September 20, 2002Publication date: March 20, 2003Inventors: Koichiro Masuda, Hirokazu Tohya, Masaharu Satoh
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Publication number: 20030053287Abstract: A sub-notebook computer is combined with an integrated wireless telephone. The overall size including the telephone is only two-thirds the size of a conventional notebook computer. This device seamlessly combines the function of a laptop computer with the function of a cellular phone. By integrating the telephone and the computer, the user can transfer wireless data much more easily. No cables or synchronization is required. The user has the benefit of using the larger display and keyboard of the computer instead of the miniature display and keyboard of the telephone. These features greatly expand the capability of the telephone in retrieving and accessing wireless data through the Internet.Type: ApplicationFiled: September 14, 2001Publication date: March 20, 2003Applicant: International Business Machines CorporationInventors: Travis Baldwin, Susan Sommers Moffatt
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Publication number: 20030053288Abstract: A housing component is provided for a handheld computer. A film layer corresponds to an exterior surface of the housing component. The film layer may have a first tone and a second tone. A groove is formed on the film layer. The groove has a contoured interior. The first surface on the interior of the groove may have the first tone. A second surface on the interior of the groove may have the second tone.Type: ApplicationFiled: September 19, 2001Publication date: March 20, 2003Inventors: Zita Netzel, Brent Eikanas, Maaike Evers, Michael Ryner, Lawrence Lam
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Publication number: 20030053289Abstract: An information-processing device includes a main body part having an accommodating part, a display part and a removable unit that is detachably attached to the accommodating part. The removable unit has latch detents receivable in latch receiving parts provided on the accommodating part. The information-processing device further includes guide grooves provided on one of the accommodating part and the removable unit and guide rails provided on the other one of the accommodating part and the removable unit. The latch receiving parts are formed on one of the guide grooves and the guide rails and have a height that is substantially equal to a height of the guide rails or a depth of the guide grooves.Type: ApplicationFiled: February 20, 2002Publication date: March 20, 2003Applicant: Fujitsu LimitedInventors: Kaigo Tanaka, Sonomasa Kobayashi
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Publication number: 20030053290Abstract: A battery pack detachably connected to an information processing apparatus, wherein the information processing apparatus includes a body part and a display part supported by the body part and thereby the display part can be opened and closed against the body part, includes a housing part having a hollow part in which a battery can be housed, wherein the hollow part is situated at a position which faces an end part of the display part when the display part is closed.Type: ApplicationFiled: March 5, 2002Publication date: March 20, 2003Applicant: Fujitsu LimitedInventors: Kaigo Tanaka, Sonomasa Kobayashi
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Publication number: 20030053291Abstract: An information processing apparatus comprises a main unit and a cover. The main unit has a slot formed in its surface and a cover mounting portion formed on the surface. An electronic device can be inserted into the main unit through the slot. The cover is located on the surface of the main unit so as to cover the slot. The cover has an end portion disposed on the cover mounting portion. The end portion is rockably attached to the cover mounting portion of the main unit by means of a hinge mechanism. The cover is detachable from the main unit.Type: ApplicationFiled: August 22, 2002Publication date: March 20, 2003Applicant: KABUSHIKI KAISHA TOSHIBAInventor: Atsuhiro Yanagida
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Publication number: 20030053292Abstract: A fastener (30) securing a data storage device (10) to a bracket (20) includes a generally arcuate base (32), and a pair of elastically deflectable first and second arms (34, 36) extending from free ends of the base. A pair of barbs (38) is respectively formed on opposite lateral sides of a free end of each of the first and second arms. A protrusion (40) is formed on an outer face of each of the first and second arms, generally between a corresponding pair of barbs. The arms are inserted into an opening (22) of the bracket and a corresponding hole (14) of a side panel of the data storage device. The barbs interferentially clasp an inner surface of the side panel at a periphery of the hole. The protrusions are received in a pair of cutouts (24) defined in the bracket in communication with the opening.Type: ApplicationFiled: September 19, 2001Publication date: March 20, 2003Inventor: Yun Lung Chen
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Publication number: 20030053293Abstract: A cooling system is configured to supply individually metered amounts of cooling fluid to heat generating components, e.g., processors, micro-controllers, high speed video cards, disk drives, semi-conductor devices, and the like, of an electronic system. The cooling system includes at least one variable speed fan, e.g., blower, configured to supply fluid through a centralized plenum and thereafter through a plurality of nozzles to the components of the electronic system. Each of the nozzles contains a valve to control the amount of fluid flow through the each of the nozzles. A controller is provided to control the operation of the variable speed fan and the operation of each of the valves is also controlled by a controller.Type: ApplicationFiled: September 14, 2001Publication date: March 20, 2003Inventors: Abdlmonem H. Beitelmal, Chandrakant D. Patel
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Publication number: 20030053294Abstract: A liquid-cooled circuit device including: a module having a circuit element and a module base plate on surface of which the circuit element is mounted; a circuit case for accommodating the module; and a cooling liquid chamber for flowing a cooling liquid in contact with a back face of the module base plate of said module. The module base plate of the module is fitted into an opening provided in a member forming the cooling liquid chamber and welded without a gap.Type: ApplicationFiled: March 19, 2002Publication date: March 20, 2003Inventors: Kazuji Yamada, Akihiro Tamba, Takayoshi Nakamura, Ryuichi Saito, Toshio Ogawa, Hisanori Okamura
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Publication number: 20030053295Abstract: A method and apparatus to encourage correct operator assembly and disassembly of a component in a socket, and the component has a heat dissipation device attached to a substrate. A first embodiment of the invention involves a method to assemble a component and a heat dissipation device to a socket on a substrate using a retention assembly. A second embodiment of the invention involves a method to disassemble a component and a heat dissipation device from a socket on a substrate using a retention assembly. A third embodiment of the invention involves an assembled substrate with a retention assembly to limit operator ability to open and close a socket holding a component, relative to the engagement and disengagement of the retention assembly attached to the component.Type: ApplicationFiled: October 16, 2001Publication date: March 20, 2003Inventors: Stephan Karl Barsun, Jeremy Ian Wilson, Thomas J. Augustin
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Publication number: 20030053296Abstract: A fan housing of a fan unit includes a housing wall standing from the surface of a printed circuit board. The printed circuit board serves to establish the fan housing in cooperation with the housing wall. The fan housing further includes a ceiling wall connected to the housing wall. The ceiling wall extends along a datum plane parallel to the surface of the printed circuit board. A high speed airflow can be generated within the fan housing. The airflow promotes the heat radiation from the printed circuit board. An electrically conductive wiring pattern extending over the surface of the printed circuit board may further promote the heat radiation from the printed circuit board.Type: ApplicationFiled: March 13, 2002Publication date: March 20, 2003Applicant: Fujitsu LimitedInventors: Atsuko Tanaka, Masuo Ohnishi
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Publication number: 20030053297Abstract: Wire bond packages which mount encapsulated semiconductor chips, such as plastic ball grid array (PBGA) packages providing for the mounting of so-called flip-chips. The chips are overlaid with a heat spreading thermally-conductive cap of a mesh-like material which is interstitially the filled with an adhesive to prevent delamination caused by mismatches in the coefficients of thermal expansion, which result in contractions which cause the entire package arrangement to warp, leading to delamination between an encapsulant and cap and resulting in failure of connect joints and the ball grid arrays.Type: ApplicationFiled: October 31, 2002Publication date: March 20, 2003Applicant: International Business Machines CorporationInventors: Michael Anthony Gaynes, Eric Arthur Johnson
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Publication number: 20030053298Abstract: A liquid-cooled circuit device including: a module having a circuit element and a module base plate on surface of which the circuit element is mounted; a circuit case for accommodating the module; and a cooling liquid chamber for flowing a cooling liquid in contact with a back face of the module base plate of said module. The module base plate of the module is fitted into an opening provided in a member forming the cooling liquid chamber and welded without a gap.Type: ApplicationFiled: August 27, 2002Publication date: March 20, 2003Inventors: Kazuji Yamada, Akihiro Tamba, Takayoshi Nakamura, Ryuichi Saito, Toshio Ogawa, Hisanori Okamura
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Publication number: 20030053299Abstract: Disclosed is an improved PC card case comprising a casing body and a cover plate to cover the extended part of the casing body. The cover plate and the extended part are fastened together by non-unlatching, counter-hook latch means.Type: ApplicationFiled: September 13, 2002Publication date: March 20, 2003Inventors: Takayuki Kasuya, Kazuhiro Homma, Hidenori Aizawa, Koichi Endo
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Publication number: 20030053300Abstract: An apparatus for supplying, in an electric-component mounting system, electric components to be mounted on a circuit substrate supported by a circuit-substrate supporting device, the apparatus including a support table, and palettes each one of which is detachably attachable to the support table and holds feeders arranged in a reference direction predetermined with respect to the electric-component mounting system, each one of the feeders feeding electric components of one sort, the palettes having different dimensions in the reference direction.Type: ApplicationFiled: September 9, 2002Publication date: March 20, 2003Applicant: FUJI MACHINE MFG. CO., LTD.Inventors: Shinsuke Suhara, Yukio Ueno, Yukihiro Fukao
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Publication number: 20030053301Abstract: A chip carrier is coupled to a printed circuit board by leads so that the chip carrier stands off from the printed circuit board. A spacer is provided between the chip carrier and the printed circuit board. The spacer reduces g forces on the leads.Type: ApplicationFiled: September 30, 2002Publication date: March 20, 2003Inventor: Gary R. Knowles
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Publication number: 20030053302Abstract: A printed circuit board includes a signal layer and a supply voltage plane layer. The signal layer includes traces to communicate signals that are not associated with regulated supply voltages. The supply voltage plane is embedded in the signal layer to supply power to multiple supply voltage pins of a component that is mounted to the printed circuit board. The printed circuit board may also include a supply voltage plane layer to communicate a supply voltage. A ground plane may be embedded in the supply voltage plane layer to provide ground connections to multiple pins of the component.Type: ApplicationFiled: September 18, 2001Publication date: March 20, 2003Inventors: Christopher J. Kelly, Jeffrey L. Krieger, Raymond P. Askew
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Publication number: 20030053303Abstract: A circuit board device includes a secondary circuit board supported on a primary circuit board and parallel to the primary circuit board for forming a compact structure. The secondary circuit board includes one end coupler for coupling to another coupler of the primary circuit board, and the other end having one or more rods supported on a frame for allowing the secondary circuit board to be stably supported on the primary circuit board. A housing may prevent the secondary circuit board from being interfered by the electromagnetic field of the primary circuit board.Type: ApplicationFiled: September 20, 2001Publication date: March 20, 2003Inventor: Chia Ching Lai
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Publication number: 20030053304Abstract: A foldaway electronic device includes a base unit having opposing lateral surfaces and an end portion, a cover unit having opposing lateral surfaces, each of which corresponds to one of the lateral surfaces of the base unit, and an end portion that is rotatably attached to the end portion of the base unit, whereby the cover unit may be rotated between a folded position relative to the base unit and an unfolded position relative to the base unit, a locking mechanism in the base unit and cover unit that locks the cover unit in the folded position, a lock release mechanism in the base unit that releases the locking mechanism when the cover unit is in the folded position, and impelling means in the base unit for impelling the cover unit from the folded position to an unfolded position after the lock release mechanism has been actuated, wherein either lateral surface of the base unit has a guard portion that extends over and prevents contact by a user's thumb and fingers with a portion of the corresponding lateralType: ApplicationFiled: November 8, 2002Publication date: March 20, 2003Inventor: Hisamitsu Takagi
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Publication number: 20030053305Abstract: A torch simulating device includes a housing having a chamber for receiving a fan devices and a flame-like member disposed on the housing and located above the fan device for being fluctuated by the fan device. One or more batteries may be used for energizing the fan device to fluctuate the flame-like member to simulate the torch. A handle may be secured to the housing for receiving the batteries. No gasoline will be burned or ignited, such that no poisonous gases will be generated, and neither disasters nor damages will be generated by the flame-like member.Type: ApplicationFiled: September 14, 2001Publication date: March 20, 2003Inventor: Yu Chuan Lin
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Publication number: 20030053306Abstract: A tool having an illumination function includes a tool body, and a light emitting device. The tool body includes a drive head having a first face provided with a mounting hole, and a second face provided with a protruding operation head located adjacent to the mounting hole. The light emitting device is mounted in the mounting hole and includes a light emitting member. The light emitting member is disposed in an inclined manner, and is directed toward the operation head of the drive head of the tool body. In addition, the light emitting member is not protruded outward from the second face of the drive head of the tool body.Type: ApplicationFiled: September 17, 2001Publication date: March 20, 2003Inventor: Chen Tsai Chang
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Publication number: 20030053307Abstract: A lighting strip for use in direction and guidance systems includes an elongated insulating base upon which one or more light emitting diode strips each supporting a plurality of light emitting diodes are positioned. A terminal housing supporting operative power systems and control apparatus is coupled to one end of the lighting strip while the remaining end may be coupled to an end cap or connected to a further lighting strip to increase the array size. The light emitting diodes are encapsulated within a light transmissive material top cover to provide physical protection and seal for the light emitting diodes.Type: ApplicationFiled: September 20, 2001Publication date: March 20, 2003Inventors: John A. Talamo, Robert A. Meyer, Thomas J. Meyer, Frank J. Lawdensky, Robert Rottinghaus
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Publication number: 20030053308Abstract: An illuminating mailbox address indication device includes a generally rectangular shaped housing mounted on a top portion of a mailbox wherein at least one longitudinal wall is removable. Enclosed within the housing is a light means powered by at least one rechargeable battery energized by a solar cell mounted upon the housing top wall in a recess formed therein. A photosensitive cell operates a switch to permit the light means to illuminate when a pre-determined threshold has been exceeded relevant to the amount of ambient light present around the mailbox (i.e., at night). At least one of the longitudinal housing side walls is translucent and further supports indica stenciled thereupon which represents the address of the property associated with the mailbox.Type: ApplicationFiled: October 9, 2002Publication date: March 20, 2003Inventor: Wayne Cathel
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Publication number: 20030053309Abstract: The invention relates to a double-filament halogen incandescent lamp for a motor vehicle headlamp. In order to reduce the light shading effects caused by the filament holder, at least one of the power supply wires (8) is provided with a section (8a) that projects out of the common plane of the power supply wires (7, 8, 9) and is guided past the main filament (5), this section (8a) being shaped such that light beams that are emitted by the main filament (5) perpendicular to its filament axis are not obstructed by the power supply wire (8).Type: ApplicationFiled: September 12, 2002Publication date: March 20, 2003Applicant: PATENT-TREUHAND-GESELLSCHAFT FUR ELEKTRISCHE GLUHLAMPEN MBHInventors: Gerhard Behr, Peter Helbig, Christian Seichter
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Publication number: 20030053310Abstract: A lamp (10) includes a substrate (12), a first lighting unit (14A) and a second lighting unit (14B). The first lighting unit (14A) includes a first light emitting diode (22A) arranged on the substrate (12), and a first lens element (24A) that has a first optical prescription and is arranged to interact with light produced by the first light emitting diode (22A). The second lighting unit (14B) includes a second light emitting diode (22B) arranged on the substrate (12), and a second lens element (24B) that has a second optical prescription and is arranged to interact with light produced by the second light emitting diode (22B). A means (30) for selectively applying electrical power has at least a first selectable mode in which the means (30) applies power to the first lighting unit (14A) whereby a first light output pattern is emitted, and a second selectable mode in which the means (30) applies power to the second lighting unit (14B) whereby a second light output pattern is emitted.Type: ApplicationFiled: September 17, 2001Publication date: March 20, 2003Inventor: Matthew Sommers
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Publication number: 20030053311Abstract: A track mounting system for supporting equipment, such as a dental light, includes a pan-shaped carriage which is suspended from the track mounting system and to which the light or other equipment is attached. The track mounting system includes a pair of spaced, parallel tracks which are engaged by rollers rotatably mounted on inner walls of the carriage. At least one of the rollers is formed from a relatively hard material and is concave to mate with the complementary surface on one of the tracks to provide resistance against side loads. Other rollers are formed from a relatively soft material and are convex to provide a light frictional resistance to movement of the carriage along the tracks that inhibits drift, over-travel and other inadvertent movement of the carriage, while reducing noise.Type: ApplicationFiled: September 19, 2001Publication date: March 20, 2003Applicant: Midmark CorporationInventor: Michael Wahl
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Publication number: 20030053312Abstract: Built-in lamp apparatus for suspended ceilings is provided with a base fixed in the spaced provided in the suspended ceiling, wherein a reflection cover is installed on the base. A fixed seat and a bulb sockets holder are installed inside in the top of the reflection cover respectively. The bulb socket holder comprises a plurality of fixed plates provided on the periphery of a baseboard. One to four bulb sockets and bulbs can be installed on the plurality of fixed plates. On the center of the baseboard is placed a vertical center shaft, which extends upwardly. The center shaft extends further to the top of the reflection cover, wherein a heat-dissipating passage is provided on the top of the reflection cover. Install the hollow sphere-shaped lampshade through the base hold of the above-described base and then connect the lampshade top with the described fixed seat. Consequently, the bulb socket holder, bulb sockets, and bulbs are contained inside the space of the lampshade.Type: ApplicationFiled: October 31, 2002Publication date: March 20, 2003Inventor: Ming-Hua Hung
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Publication number: 20030053313Abstract: A reflector for a lamp is provided, the reflector including a vent hole extending through the reflector body. A first enclosure extends into the reflector body from an outer reflective surface, and a second enclosure extends into the reflector body from an opposite inner surface. The second enclosure overlaps and intersects the first enclosure in such a way as to form a continuous vent hole extending from the outer surface to the inner surface, the vent hole being obscured when looking at the first surface.Type: ApplicationFiled: September 18, 2001Publication date: March 20, 2003Inventors: Kevin D. Koons, Paul W. Krinop
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Publication number: 20030053314Abstract: An arena light reflecting assembly includes an asymmetric parabolic shaped reflector having an exit aperture. The reflector surrounds a horizontally extending high intensity light source and has a focal axis that lies along an axis of an arc tube of the light source so that the reflector acts as a collimator redirecting light from the light source into essentially parallel rays from the exit aperture. A pan circumscribes the exit aperture and a louver assembly is disposed within the exit aperture behind a front surface of the pan.Type: ApplicationFiled: September 20, 2002Publication date: March 20, 2003Inventors: Robert L. Summerford, Randall P. Bergin
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Publication number: 20030053315Abstract: A recessed down light includes a mounting base frame, a rotary carrier revolvably supported in the mounting base frame, two friction members fastened to the mounting base frame and pressed on the rotary carrier and adapted hold the rotary carrier in position when external force disappeared, a lamp holder holding a halogen lamp and pivoted to the rotary carrier for turning in and out of the rotary carrier by hand, and a track frame fastened to the rotary carrier and adapted to guide circular motion of the lamp holder relative to the rotary carrier within 90°.Type: ApplicationFiled: September 19, 2001Publication date: March 20, 2003Applicant: Tai-Jan Luminaire Ltd.Inventor: Shih-Huei Chen
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Publication number: 20030053316Abstract: A license light for a two-wheeled vehicle capable of uniformly illuminating a display plane of a license plate. A lamp main body is supported in a light housing portion of a light cover mounted to a license plate mounting portion of a rear fender. The lamp main body is configured such that a lamp fixed to a base via a socket is covered with a lens. A prism is provided on an upper surface portion of the lens through which light emitted from the lamp is directed for illuminating a display plane of the license plate. The prism is formed by arraying a plurality of prism elements, each of which is directed in a direction parallel to the center line of a vehicular body, in a direction perpendicular to the center line direction. The light emitted from the lamp is uniformly diffused by the prism, so that the license light is uniformly illuminated with the light with a uniform brightness.Type: ApplicationFiled: August 14, 2002Publication date: March 20, 2003Inventors: Seiji Yamaguchi, Toru Miyagawa, Toshinori Nakano
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Publication number: 20030053317Abstract: A raised brake light assembly for motor vehicles has a housing and a housing lens closing off the housing. At least one brake light is arranged in the housing behind the housing lens. At least one ambient light assembly is arranged within the housing. The at least one ambient light assembly radiates light in a direction different from the direction in which the at least one brake light radiates.Type: ApplicationFiled: September 13, 2002Publication date: March 20, 2003Applicant: Schefenacker Vision Systems Germany GmbH & Co. KGInventor: Jens Mertens
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Publication number: 20030053318Abstract: A vehicular lamp that radiates light by indirect illumination and employing a plurality of LED light sources, wherein the entire reflective surface of the reflector has a substantially uniform brightness and the degree of freedom of designing the outer shape of the lamp is increased. First and second LED light source groups are formed by arranging a plurality of LED light sources back-to-back in a row. First and second lens groups are formed by arranging a plurality of Fresnel lenses for forming light from each of the LED light sources into parallel light fluxes with the directions of the parallel light fluxes of each LED light source group being aligned. First and second reflectors are provided for reflecting the parallel light fluxes from each of the lens groups forward of the lamp.Type: ApplicationFiled: September 16, 2002Publication date: March 20, 2003Applicant: KOITO MANUFACTURING CO., LTDInventor: Yasuyuki Amano
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Publication number: 20030053319Abstract: A vehicle headlamp includes a moveable shade. The front end of the shade body of the movable shade is formed into a substantially semispherical shape. The maximum radius of the pivotal locus of the shade body is smaller than conventional shades that have a front end portion formed into a cylindrical shape. Further, a slot is found in the front end portion that extends along the pivotal face of the movable shade. Therefore, the shade body and the discharge bulb do not interfere with each other even when the movable shade is caused to pivot, and the maximum radius of the pivotal locus of the shade body is further reduced. Thus, the shade body of a fixed shade can be smaller in size so that a greater space can be secured for use in disposing the fixed shade within an allowable range that refrains from unnecessarily shading the light reflected from a reflector.Type: ApplicationFiled: September 18, 2002Publication date: March 20, 2003Inventors: Shoichiro Yokoi, Michihiko Hayakawa
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Publication number: 20030053320Abstract: A harmonic mitigating apparatus connected between a three phase power source and a load provides a multiple-winding reactor for reducing harmonics directed from the load to the source, the apparatus including, for each system phase, first and second line windings in series between the source and load and oriented so as to have the same polarity such that the winding fluxes add thereby increasing total reactance to harmonics directed from the load to the supply, the apparatus also including at least one trap circuit including a series inductance and capacitor for each phase and linked between the first and second line windings and a neutral point (or another phase), the trap circuit characterized by a reactance that is lower than the reactance of the first line winding such that harmonics flow into the trap circuit, for each phase, at least two of the first and second line windings and the trap winding arranged on the same core.Type: ApplicationFiled: September 20, 2001Publication date: March 20, 2003Inventors: Dongsheng Zhou, Gary L. Skibinski, Walt A. Maslowski, Brian R. Buchholz, Nick N. Guskov
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Publication number: 20030053321Abstract: A power supply circuit which generates a power supply for a circuit which drives a source electrode and a gate electrode provided in a display, includes a first booster circuit which outputs a third potential boosted based on a difference between first and second potentials, a potential regulator circuit which outputs a fourth potential being a constant potential generated based on a difference between the first and third potentials, and a second booster circuit which outputs a fifth potential boosted based on a difference between the first and fourth potentials. The first and fourth potentials are supplied to a source electrode driver circuit, and the first and fifth potentials are supplied to a gate electrode driver circuit. A voltage supplied to the gate electrode driver circuit may be generated by using a voltage conversion circuit.Type: ApplicationFiled: September 10, 2002Publication date: March 20, 2003Applicant: SEIKO EPSON CORPORATIONInventor: Hisanobu Ishiyama
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Publication number: 20030053322Abstract: A power supply constructed and arranged so that the power supply is charged during an interval during the rising edge and during an interval during the falling edge, and so that the charging circuitry does not charge the capacitor at the peak of the AC cycle.Type: ApplicationFiled: September 17, 2001Publication date: March 20, 2003Inventor: Sean S. Chiu
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Publication number: 20030053323Abstract: A power inverter for a polyphase load such as an AC motor is provided which is designed to minimize an on-off switching loss of transistors installed in the inverter. The inverter works to disenable switching operations of the transistors for each phase in a first cycle during which a corresponding output current is high in level and partially disenable the switching operations in a second cycle following the first cycle during which the corresponding output current is middle in level.Type: ApplicationFiled: September 18, 2002Publication date: March 20, 2003Inventors: Tomonori Kimura, Masahito Mizukoshi
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Publication number: 20030053324Abstract: The power conversion device of the present invention comprises a power diode rectifier (REC) whose AC terminal is connected through an AC reactor (Ls) with an AC power source; voltage-type self-commutated power converters (CNV) whose AC terminals are connected with the AC terminal of this power diode rectifier through a recovery current suppression reactor (La); and a DC smoothing capacitor (Cd) connected between a DC common terminal of this voltage type self-commutated power converter and the power diode rectifier, with a load device connected in parallel therewith.Type: ApplicationFiled: September 12, 2002Publication date: March 20, 2003Inventors: Hajime Yamamoto, Shigeru Tanaka, Hiroshi Uchino
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Publication number: 20030053325Abstract: A content-addressable memory device with multiple WORD lines has: a first memory block to store whether there is a hit during current time period; a second memory block to store whether there is a hit during a period preceding the current time period, the first and second memory blocks being provided for each WORD line; and means of selecting a WORD line to determine a WORD line to be aged out according to values stored in the first and second memory blocks.Type: ApplicationFiled: September 18, 2002Publication date: March 20, 2003Applicant: NEC CORPORATIONInventor: Teruo Kaganoi
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Publication number: 20030053326Abstract: To provide a ferroelectric storage device which can read all the quantities of charge (polarization quantity: 2Pr) accumulated in a ferroelectric during a writing operation. In the present invention, a bit line is recharged, a charge quantity required for recharging is detected, and the quantity is read on a sub bit line, thereby achieving a stable reading operation.Type: ApplicationFiled: September 3, 2002Publication date: March 20, 2003Applicant: Matsushita Electric Industrial Co., Ltd.Inventor: Yasuo Murakuki
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Publication number: 20030053327Abstract: A nonvolatile ferroelectric memory includes a top cell array block and a bottom cell array block, each array block having sub cell array blocks, each sub cell array block having a plurality of unit cells; a plurality of main bitlines arranged in one direction in correspondence to a column unit of the sub cell array blocks; a plurality of sub bitlines each connected to one terminal of one of the plurality of unit cells arranged in a same direction as the one direction of the main bitlines; a sense amplifier block having sense amplifiers between the top cell array block and the bottom cell array block, each sense amplifier for amplifying a signal from the main bitline; sub bitline first switch signal application lines and sub bitline second switch signal application lines for controlling connection of the sub bitlines and the main bitlines, sub bitline pull up signal application lines for controlling pull up of the sub bitlines by a self boost operation, and sub bitline pull down signal application lines for seType: ApplicationFiled: September 4, 2002Publication date: March 20, 2003Applicant: Hynix Semiconductor Inc.Inventors: Hee Bok Kang, Hun Woo Kye, Geun Il Lee, Je Hoon Park, Jung Hwan Kim
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Publication number: 20030053328Abstract: A column repair circuit in a non-volatile ferroelectric memory having main columns and redundancy columns includes a data input/output buffer part for data input/output between the non-volatile ferroelectric memory and an external circuit, a failed column coding part for controlling the main columns and the redundancy columns and connected in response to a failed column address signal to one of main input/output lines in the input/output buffer part and redundancy input/output lines, a repair column adjusting circuit part connected to the failed column coding part for providing a redundancy mode control signal, a data bus amplifying part for amplifying data between the main input/output lines and the main columns to control read/write operation, and a redundancy data bus amplifying part for amplifying data between the redundancy input/output lines and the redundancy columns in response to the redundancy mode control signal.Type: ApplicationFiled: September 9, 2002Publication date: March 20, 2003Applicant: Hynix Semiconductor Inc.Inventors: Je Hoon Park, Hee Bok Kang, Hun Woo Kye, Duck Ju Kim
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Publication number: 20030053329Abstract: An improved memory device employs a DRAM array for data storage. In the device, a special row address decoder simultaneously asserts a corresponding unique pair of the wordlines in response to each received valid row address, so that a single valid row address simultaneously accesses two rows of memory cells in the array. The device differentially writes and reads each bit of data across a pair of memory cells; each one of the pair of memory cells being within a different respective row of the array, and the two different rows together corresponding to one of the unique pairs of wordlines asserted by the row address decoder responsive to a valid row address. This arrangement obviates the need for high voltage boosting circuits and thereby reduces power consumption.Type: ApplicationFiled: September 17, 2001Publication date: March 20, 2003Inventor: Wenliang Chen
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Publication number: 20030053330Abstract: This invention discloses a dynamic random access memory (DRAM) memory cell. The DRAM memory cell includes a first transistor-capacitor circuit connected to a first bitline BL and a second transistor-capacitor circuit connected to a second bitline BL#. The memory cell further includes a gate of the first transistor connected to a gate of the second transistor. The DRAM cell further includes a sense amplifier connected to the first bit line BL and the second bit line BL# for measuring a binary bit from sensing a voltage difference between the first and second transistor-capacitor circuits independent from a pre-charged bit-line voltage.Type: ApplicationFiled: June 10, 2002Publication date: March 20, 2003Applicant: UniRAM Technology, Inc.Inventors: Jeng-Jye Shau, Byeong-Cheal Na
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Publication number: 20030053331Abstract: A magnetoresistive multi-level generator including a first series circuit with a first magnetoresistive element having a resistance equal to Rmax connected in series with n first magnetoresistive elements each having a resistance equal to Rmin. Where n is equal to a whole integer greater than one, n additional series circuits, each including an additional magnetoresistive element with a resistance equal to Rmax connected in series with n magnetoresistive elements each with a resistance equal to Rmin. The first and n additional series circuits being connected in series between the input and output terminals and in parallel with each other. Whereby a total resistance between the input and output terminals is a level Rmin+&Dgr;R/n, where &Dgr;R is equal to Rmax−Rmin.Type: ApplicationFiled: August 22, 2001Publication date: March 20, 2003Applicant: Motorola, Inc.Inventor: Peter K. Naji
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Publication number: 20030053332Abstract: A three-dimensional memory array includes a plurality of rail-stacks on each of several levels forming alternating levels of X-lines and Y-lines for the array. Memory cells are formed at the intersection of each X-line and Y-line. The memory cells of each memory plane are all oriented in the same direction relative to the substrate, forming a serial chain diode stack. In certain embodiments, row and column circuits for the array are arranged to interchange function depending upon the directionality of memory cells in the selected memory plane. High-voltage drivers for the X-lines and Y-lines are each capable of passing a write current in either direction depending on the direction of the selected memory cell. A preferred bias arrangement reverse biases only unselected memory cells within the selected memory plane, totaling approximately N2 memory cells, rather than approximately 3N2 memory cells as with prior arrays.Type: ApplicationFiled: June 29, 2001Publication date: March 20, 2003Inventors: Bendik Kleveland, Roy E. Scheuerlein, N. Johan Knall, Mark G. Johnson, Thomas H. Lee
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Publication number: 20030053333Abstract: There exists a tradeoff between the fidelity of data storage and the number of bits stored in a memory cell. The number of bits may be increased per cell when fidelity is less important. The number of bits per cell may be decreased when fidelity is more important. A memory, in some embodiments, may change between storage modes on a cell by cell basis.Type: ApplicationFiled: September 18, 2001Publication date: March 20, 2003Inventors: John C. Rudelic, Richard E. Fackenthal
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Publication number: 20030053334Abstract: A flash non-volatile memory system that normally operates its memory cells in multiple storage states is provided with the ability to operate some selected or all of its memory cell blocks in two states instead. The two states are selected to be the furthest separated of the multiple states, thereby providing an increased margin during two state operation. This allows faster programming and a longer operational life of the memory cells being operated in two states when it is more desirable to have these advantages than the increased density of data storage that multi-state operation provides.Type: ApplicationFiled: August 26, 2002Publication date: March 20, 2003Applicant: SanDisk CorporationInventor: Jian Chen
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Publication number: 20030053335Abstract: Structures and methods for selectively applying a well bias to only those portions of a PLD where such a bias is necessary or desirable, e.g., applying a positive well bias to transistors on critical paths within a user's design. A substrate for an integrated circuit includes a plurality of wells, each of which can be independently and programmably biased with the same or a different well bias voltage. In one embodiment, FPGA implementation software automatically determines the critical paths and generates a configuration bitstream that enables positive well biasing only for the transistors participating in the critical paths, or only for programmable logic elements (e.g., CLBs or lookup tables) containing those transistors. In another embodiment, negative well biasing is selectively applied to reduce leakage current.Type: ApplicationFiled: September 18, 2001Publication date: March 20, 2003Applicant: Xilinx, Inc.Inventors: Michael J. Hart, Steven P. Young, Daniel Gitlin, Hua Shen, Stephen M. Trimberger