Patents by Inventor Norio Fujii
Norio Fujii has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
-
Patent number: 10224261Abstract: An electronic component mounting structure includes a terminal of an electronic component package and a chip heat radiating member. The terminal is soldered on a land of an electronic substrate and the chip heat radiating member is soldered on a back surface of the electronic component package. The chip heat radiating member is covered by a packaging resin. A metallic heat radiating pattern integrally includes a pattern extension part that protrudes from the electronic component package, such that at least a part of the metallic heat radiating pattern is formed so as to be larger than the electronic component package. The pattern extension part is configured to guide excessive solder to an outside of the electronic component package.Type: GrantFiled: September 4, 2015Date of Patent: March 5, 2019Assignee: CALSONIC KANSEI CORPORATIONInventors: Hideki Sunaga, Yuuzou Shimamura, Norio Fujii, Yuuji Daimon
-
Patent number: 9943010Abstract: Air in a thermally insulated space, which has been expanded by heat resulting from heating treatment for curing a thermosetting potting material, is prevented from entering the potting material. A casing has a partition wall that partitions an opening into a heat-generating-electronic-component placement section, where a heat generating electronic component is placed, and an adjacent section that is adjacent to the heat-generating-electronic-component placement section, when a heat releasing member is fixed to the opening. The heat-generating-electronic-component placement section is filled with a thermosetting potting material for moisture prevention up to a height which allows at least the heat generating electronic component to be buried in the potting material. The adjacent section has in the casing a communicating portion that communicates with a position which is apart from the heat-generating-electronic-component placement section filled with the potting material.Type: GrantFiled: September 4, 2015Date of Patent: April 10, 2018Assignee: Calsonic Kansei CorporationInventors: Yuuji Daimon, Norio Fujii, Hideki Sunaga, Haruo Suzuki, Yuuzou Shimamura
-
Publication number: 20170347491Abstract: Air in a thermally insulated space, which has been expanded by heat resulting from heating treatment for curing a thermosetting potting material, is prevented from entering the potting material. A casing has a partition wall that partitions an opening into a heat-generating-electronic-component placement section, where a heat generating electronic component is placed, and an adjacent section that is adjacent to the heat-generating-electronic-component placement section, when a heat releasing member is fixed to the opening. The heat-generating-electronic-component placement section is filled with a thermosetting potting material for moisture prevention up to a height which allows at least the heat generating electronic component to be buried in the potting material. The adjacent section has in the casing a communicating portion that communicates with a position which is apart from the heat-generating-electronic-component placement section filled with the potting material.Type: ApplicationFiled: September 4, 2015Publication date: November 30, 2017Applicant: CALSONIC KANSEI CORPORATIONInventors: Yuuji DAIMON, Norio FUJII, Hideki SUNAGA, Haruo SUZUKI, Yuuzou SHIMAMURA
-
Publication number: 20170243801Abstract: An electronic component mounting structure includes a terminal of an electronic component package and a chip heat radiating member. The terminal is soldered on a land of an electronic substrate and the chip heat radiating member is soldered on a back surface of the package. The chip heat radiating member is covered by a packaging resin. The metallic heat radiating pattern integrally includes a pattern extension part that is protruded from the package, such that at least a part of the metallic heat radiating pattern in formed to be larger than the package. The pattern extension part guides excessive solder to outside of the package.Type: ApplicationFiled: September 4, 2015Publication date: August 24, 2017Applicant: Calsonic Kansei CorporationInventors: Hideki SUNAGA, Yuuzou SHIMAMURA, Norio FUJII, Yuuji DAIMON
-
Patent number: 9518314Abstract: A production method of an extrusion billet includes a step of preparing a plate or lump starting material comprising a magnesium alloy, a step of performing a plastic deformation process at a rolling reduction of 70% or more to the starting material at a temperature of 250° C. or lower to introduce a strain without generating dynamic recrystallization, a step of producing powder by granulating the material after the plastic deformation process, and a step of producing a powder billet by compressing the powder.Type: GrantFiled: June 19, 2008Date of Patent: December 13, 2016Assignees: KURIMOTO LTD.Inventors: Katsuyoshi Kondoh, Makoto Hotta, Jinsun Liao, Kantaro Kaneko, Norio Fujii, Hirohito Kametani, Akihiko Koshi
-
Publication number: 20150226378Abstract: A liquefied gas fuel filling system provided with a filling and pressure-balanced receptacle at a vehicle side combined with a filling and pressure-balanced nozzle at a station side connected with a storage tank, and an excess flow prevention valve provided in a pressure-balanced line for making the filling and pressure-balanced receptacle and a gas-phase region of a fuel tank contact each other. An orifice is provided in a pressure-balanced receptacle of the filling and pressure-balanced receptacle, thereby enabling the fuel tank to be smoothly filled with liquefied gas even when the outside air temperature rises.Type: ApplicationFiled: August 29, 2013Publication date: August 13, 2015Inventors: Shigehisa Takase, Kenichi Shintani, Norio Fujii, Hiroyuki Amemori
-
Publication number: 20110089272Abstract: A method for manufacturing a magnesium alloy material includes the steps of: preparing a sheet or block of starting material that is made of a magnesium alloy; subjecting the starting material to a plastic working process at a temperature of 250° C. or less and a reduction ratio of 70% or more to introduce strain without causing dynamic recrystallization; pulverizing the material subjected to said plastic working process into powder; compressively deforming said powder by passing said powder between a pair of rotating rolls; and successively crushing the compressively deformed powder, which has passed between the pair of rotating rolls, into granular powder.Type: ApplicationFiled: December 5, 2008Publication date: April 21, 2011Applicants: Katsuyoshi, KURIMOTO, LTD.Inventors: Katsuyoshi Kondoh, Makoto Hotta, Jinsun Liao, Kantaro Kaneko, Norio Fujii, Hirohito Kametani, Akihiko Koshi
-
Publication number: 20100166593Abstract: A production method of an extrusion billet includes a step of preparing a plate or lump starting material comprising a magnesium alloy, a step of performing a plastic deformation process at a rolling reduction of 70% or more to the starting material at a temperature of 250° C. or lower to introduce a strain without generating dynamic recrystallization, a step of producing powder by granulating the material after the plastic deformation process, and a step of producing a powder billet by compressing the powder.Type: ApplicationFiled: June 19, 2008Publication date: July 1, 2010Applicant: KURIMOTO, LTD.Inventors: Katsuyoshi Kondoh, Makoto Hotta, Jinsun Liao, Kantaro Kaneko, Norio Fujii, Hirohito Kametani, Akihiko Koshi
-
Patent number: 7723975Abstract: Indirect detection of current using a current mirror circuit is performed with good accuracy, with a small sized circuit. In a current detection circuit, a current detection current mirror circuit includes an output current transistor which supplies an output current, and a current detection transistor which supplies a detection current proportional to the output current. A compensation current mirror circuit is connected to a current supply side of the current detection current mirror circuit, so as to make a collector voltage of the output current transistor and a collector voltage of the current detection transistor equal. A current detector detects the detection current, to indirectly detect the output current.Type: GrantFiled: January 16, 2006Date of Patent: May 25, 2010Assignee: Rohm Co., Ltd.Inventor: Norio Fujii
-
Publication number: 20090153131Abstract: Indirect detection of current using a current mirror circuit is performed with good accuracy, with a small sized circuit. In a current detection circuit, a current detection current mirror circuit includes an output current transistor which supplies an output current, and a current detection transistor which supplies a detection current proportional to the output current. A compensation current mirror circuit is connected to a current supply side of the current detection current mirror circuit, so as to make a collector voltage of the output current transistor and a collector voltage of the current detection transistor equal. A current detector detects the detection current, to indirectly detect the output current.Type: ApplicationFiled: January 16, 2006Publication date: June 18, 2009Inventor: Norio Fujii
-
Patent number: 7279942Abstract: The invention provides a differential current output unit that has a least number of capacitors and a minimized chip area on one hand, and on the other hand that is capable of providing a smoothly varying output current across a zero-crossing point in accord with an inputted difference input voltage. To do this, the differential current output unit is entirely formed of differential circuits and current mirror circuits having predetermined current mirror ratios. Thus, the unit has a stable output current characteristic. The unit has an inflow output transistor circuit and an outflow output transistor circuit that are operably separated by a delivery circuit. Thus, no penetration current will flow through the inflow- and outflow-output transistor circuits.Type: GrantFiled: September 14, 2005Date of Patent: October 9, 2007Assignee: Rohm Co., Ltd.Inventors: Kenji Otani, Norio Fujii
-
Publication number: 20070092232Abstract: A motor drive unit (100) includes a pulse train generator 38, a clock signal generator (18), and an energization signal generator (20). The pulse train generator (38) creates a pulse each time an edge of a square wave signal (Vrct) is detected, and generates a pulse train (Vpls). The clock signal generator (18) generates a clock signal (Vclk) having a frequency N times a frequency of the pulse train (Vpls). The energization signal generator (20) generates an energization signal having a level that designates energization for a coil of a motor (102), for a time period in which the clock signal (Vclk) is counted M times, and, after that, having a level that indicates non-energization for the coil, for a time period in which the clock signal (Vclk) is counted (N?M) times.Type: ApplicationFiled: October 19, 2006Publication date: April 26, 2007Inventor: Norio Fujii
-
Patent number: 7145327Abstract: A rotor of a sensor-less motor has a multiplicity of magnetic poles, with one magnetic pole giving a smaller magnetic flux than other the magnetic poles. A coil is provided at a predetermined position external to the rotor. An induction signal is generated in the coil as the magnetic flux through it is changed by the rotation of the rotor. An index signal indicative of the reference rotational position of the rotor is generated based on the change in the induction signal. Thus, the reference rotational position of the disk of an information recording-reproducing unit, for example, can be detected without utilizing any Hall elements.Type: GrantFiled: October 15, 2004Date of Patent: December 5, 2006Assignee: Rohm Co., Ltd.Inventors: Norio Fujii, Toshiya Suzuki
-
Publication number: 20060006910Abstract: The invention provides a differential current output unit that has a least number of capacitors and a minimized chip area on one hand, and on the other hand that is capable of providing a smoothly varying output current across a zero-crossing point in accord with an inputted difference input voltage. To do this, the differential current output unit is entirely formed of differential circuits and current mirror circuits having predetermined current mirror ratios. Thus, the unit has a stable output current characteristic. The unit has an inflow output transistor circuit and an outflow output transistor circuit that are operably separated by a delivery circuit. Thus, no penetration current will flow through the inflow- and outflow-output transistor circuits.Type: ApplicationFiled: September 14, 2005Publication date: January 12, 2006Inventors: Kenji Otani, Norio Fujii
-
Patent number: 6977535Abstract: The invention provides a differential current output unit that has a least number of capacitors and a minimized chip area on one hand, and on the other hand that is capable of providing a smoothly varying output current across a zero-crossing point in accord with an inputted difference input voltage. To do this, the differential current output unit is entirely formed of differential circuits and current mirror circuits having predetermined current mirror ratios. Thus, the unit has a stable output current characteristic. The unit has an inflow output transistor circuit and an outflow output transistor circuit that are operably separated by a delivery circuit. Thus, no penetration current will flow through the inflow- and outflow-output transistor circuits.Type: GrantFiled: April 19, 2004Date of Patent: December 20, 2005Assignee: Rohm Co., Ltd.Inventors: Kenji Otani, Norio Fujii
-
Publication number: 20050083044Abstract: A rotor of a sensor-less motor has a multiplicity of magnetic poles, with one magnetic pole giving a smaller magnetic flux than other the magnetic poles. A coil is provided at a predetermined position external to the rotor. An induction signal is generated in the coil as the magnetic flux through it is changed by the rotation of the rotor. An index signal indicative of the reference rotational position of the rotor is generated based on the change in the induction signal. Thus, the reference rotational position of the disk of an information recording-reproducing unit, for example, can be detected without utilizing any Hall elements.Type: ApplicationFiled: October 15, 2004Publication date: April 21, 2005Inventors: Norio Fujii, Toshiya Suzuki
-
Publication number: 20040227477Abstract: The invention provides a differential current output unit that has a least number of capacitors and a minimized chip area on one hand, and on the other hand that is capable of providing a smoothly varying output current across a zero-crossing point in accord with an inputted difference input voltage. To do this, the differential current output unit is entirely formed of differential circuits and current mirror circuits having predetermined current mirror ratios. Thus, the unit has a stable output current characteristic. The unit has an inflow output transistor circuit and an outflow output transistor circuit that are operably separated by a delivery circuit. Thus, no penetration current will flow through the inflow- and outflow-output transistor circuits.Type: ApplicationFiled: April 19, 2004Publication date: November 18, 2004Applicant: ROHM CO., LTD.Inventors: Kenji Otani, Norio Fujii
-
Publication number: 20040218704Abstract: An input signal Vina is converted into a digital signal by an AD converter 10 and output as a digitized input signal Vind. A counter circuit 20 sets a count number based on the digitized input signal Vind and starts to count a counter clock signal CLKc upon a trigger signal TRG, and generates an output signal Sout when the count number is obtained.Type: ApplicationFiled: February 18, 2004Publication date: November 4, 2004Applicant: Rohm Co., Ltd.Inventor: Norio Fujii
-
Patent number: 6710568Abstract: A motor drive device of the invention has means for producing a pulse signal having a fixed amplitude by comparing a drive signal that is a sinusoidal signal synchronous with the rotation of a motor with a predetermined high-frequency signal, and the switching of a switching device connected between a power source and the motor is controlled by the pulse signal. This prevents the lowering of the switching speed of the switching device connected between the power source and the motor near the zero-cross points of the sinusoidal drive signal. This helps minimize switching loss and enhance power efficiency. Moreover, the phase current that flows through the motor comes to have a sinusoidal waveform. This helps enhance rotation characteristics.Type: GrantFiled: January 14, 2002Date of Patent: March 23, 2004Assignee: Rohm Co., Ltd.Inventor: Norio Fujii
-
Publication number: 20020093304Abstract: A motor drive device of the invention has means for producing a pulse signal having a fixed amplitude by comparing a drive signal that is a sinusoidal signal synchronous with the rotation of a motor with a predetermined high-frequency signal, and the switching of a switching device connected between a power source and the motor is controlled by the pulse signal. This prevents the lowering of the switching speed of the switching device connected between the power source and the motor near the zero-cross points of the sinusoidal drive signal. This helps minimize switching loss and enhance power efficiency. Moreover, the phase current that flows through the motor comes to have a sinusoidal waveform. This helps enhance rotation characteristics.Type: ApplicationFiled: January 14, 2002Publication date: July 18, 2002Inventor: Norio Fujii