Patents by Inventor Hiroyuki Yoshikawa

Hiroyuki Yoshikawa 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: 7199677
    Abstract: A frequency modulation apparatus 100 has a synthesizer 101, a differentiator 102 that differentiates phase modulation data and generates differential phase modulation data, an adder 103 that adds together that differential phase modulation data and carrier frequency data fractional part K and generates addition fractional part K1, an input data operation section 104 that receives addition fractional part K1 and carrier frequency data integer part M, generates integer part input data M1 and fractional part input data K2, and provides fractional part input data K2 to synthesizer 101, and an integer part data delay section 105 that delays integer part input data M1 before providing it to synthesizer 101. Input data operation section 104 makes M1=M?1 and K2=K1+1 when K1<0, makes M1=M and K2=K1 when 0?K1<1, and makes M1=M+1 and K2=K1?1 when 1?K1.
    Type: Grant
    Filed: March 16, 2005
    Date of Patent: April 3, 2007
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Yoshikawa, Hisashi Adachi, Shunsuke Hirano
  • Patent number: 7179577
    Abstract: A carrier for an image developer for electrophotography, including core particles, and a coating layer covering each of the core particles, wherein the core particles have a weight average particle diameter of Dv which is 25–45 ?m and a number average particle diameter of Dp which meets with the following condition: 1?Dv/Dp?1.3, wherein the core particles have such a particle size distribution that particles having a particle diameter of less than 44 ?m is at least 70% by weight and particles having a particle diameter of less than 22 ?m is not more than 7% by weight.
    Type: Grant
    Filed: November 21, 2005
    Date of Patent: February 20, 2007
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroaki Matsuda, Fumihiro Sasaki, Hiroyuki Yoshikawa
  • Publication number: 20070019759
    Abstract: An amplitude information extraction apparatus capable of reducing an amplitude error with a smaller circuit scale than theoretical operation circuits. In this apparatus, amplitude information extraction apparatus (110) acquires amplitude information (amplitude value Z?) to be corrected from an I component and Q component of a transmission signal. Phase information extraction apparatus (111) acquires phase information from an I component and Q component of the transmission signal. Amplitude information extraction apparatus (110) then acquires amplitude value Z by correcting the acquired amplitude information (amplitude value Z?) based on the phase information acquired by phase information extraction apparatus (111).
    Type: Application
    Filed: September 27, 2004
    Publication date: January 25, 2007
    Inventors: Hiroyuki Yoshikawa, Shunsuke Hirano
  • Patent number: 7166404
    Abstract: A carrier for an image developer for electrophotography, including core particles, and a coating layer covering each of the core particles, wherein the core particles have a weight average particle diameter of Dv which is 25–45 ?m and a number average particle diameter of Dp which meets with the following condition: 1?Dv/Dp?1.3, wherein the core particles have such a particle size distribution that particles having a particle diameter of less than 44 ?m is at least 70% by weight and particles having a particle diameter of less than 22 ?m is not more than 7% by weight.
    Type: Grant
    Filed: March 4, 2002
    Date of Patent: January 23, 2007
    Assignee: Ricoh Company, Ltd.
    Inventors: Hiroaki Matsuda, Fumihiro Sasaki, Hiroyuki Yoshikawa
  • Publication number: 20060279763
    Abstract: An image copying device and an image copying system are arranged to read an image of a document and to acquire copyright information on each area regarding the image of the document from an IC chip embedded in the document. Then, based on the read image data and the acquired copyright information, a selection screen is displayed on a manipulation/display panel. Copyright information on each area of the image of the document is schematically represented on the selection screen. Whether or not copying is performed is selected area by area by manipulation by a user on this screen. For areas for which “copying” is selected is copied, but areas for which “nocopying” has been selected is not copied. Further, a copyright fee pertaining to the copied areas is collected. Thus, the image copying device and an image copying system enable the user to select appropriate processing according to differences in copyright information from one area to another of the image and cause images to be formed.
    Type: Application
    Filed: February 24, 2006
    Publication date: December 14, 2006
    Applicant: KONICA MINOLTA BUSINESS TECHNOLOGIES, INC.
    Inventors: Tomonobu Tamura, Akihiro Hayashi, Tatsuya Eguchi, Hiroyuki Yoshikawa, Kenichi Hayashi
  • Publication number: 20060073405
    Abstract: A carrier for an image developer for electrophotography, including core particles, and a coating layer covering each of the core particles, wherein the core particles have a weight average particle diameter of Dv which is 25-45 ?m and a number average particle diameter of Dp which meets with the following condition: 1?Dv/Dp?1.3, wherein the core particles have such a particle size distribution that particles having a particle diameter of less than 44 ?m is at least 70% by weight and particles having a particle diameter of less than 22 ?m is not more than 7% by weight.
    Type: Application
    Filed: November 21, 2005
    Publication date: April 6, 2006
    Inventors: Hiroaki Matsuda, Fumihiro Sasaki, Hiroyuki Yoshikawa
  • Patent number: 7011921
    Abstract: A method of producing a toner composition, including stirring and mixing toner particles comprising a binder resin, a colorant and a release agent with a charge controlling agent in a fluidizing and stirring mixer comprising a rotor having a stirring blade to fix the charge controlling agent on a surface of the toner particles, wherein the stirring and mixing comprises rotating the rotor at a peripheral speed of from 65 to 120 m/s at an environmental temperature (T) in the fluidizing and stirring mixer, satisfying the relationship,Tg-10>T>Tg-35(° C.), where the Tg represents a glass transition temperature of the binder resin.
    Type: Grant
    Filed: August 12, 2003
    Date of Patent: March 14, 2006
    Assignee: Ricoh Company, Ltd.
    Inventors: Junya Koeda, Kenichi Uehara, Hiroyuki Yoshikawa, Osamu Kouzu
  • Publication number: 20060049802
    Abstract: Terminal plates (30) are juxtaposed on a base plate (11) for electrically connecting positive and negative electrodes of a solar battery module (90) to cables (80) for external connection. A rectifying device (50) spans between adjacent terminal plates (30). Each rectifying device (50) has a bypass diode (52) and a metal clip (53) resiliently holds the bypass diode (52). A heat discharging sheet (40) is attached to the lower surface of the clip (53) for discharging heat generated by the bypass diode (52). Heat discharged from a heat discharging surface (40A) of the heat discharging sheet (40) is received by a heat receiving surface (90A) of the solar battery module (90) via a through hole (11B) formed in the base plate (11) and is discharged efficiently from the solar battery module (90).
    Type: Application
    Filed: August 1, 2005
    Publication date: March 9, 2006
    Applicant: Sumitomo Wiring Systems, Ltd.
    Inventors: Makoto Higashikozono, Hiroyuki Yoshikawa, Kazuki Naito
  • Publication number: 20060052073
    Abstract: An object of the present invention is to provide a modulation-precision enhanced broadband modulation PLL, a timing error correcting system of the broadband modulation PLL, a timing error correcting method and an adjusting method of a radio communication device having a broadband modulation PLL. There is provided a PLL portion containing a voltage controlled oscillator (101), a frequency divider (105), a phase comparator (104) and a loop filter (103). A frequency-dividing ratio of the frequency divider (105) is controlled to apply modulation, and also an input voltage of the voltage controlled oscillator (101) is controlled to apply modulation.
    Type: Application
    Filed: August 4, 2004
    Publication date: March 9, 2006
    Applicant: Matsushita Electric Industrial Co., Ltd.
    Inventors: Hiroyuki Yoshikawa, Shunsuke Hirano
  • Publication number: 20060039234
    Abstract: A method of producing a toner composition, including stirring and mixing toner particles comprising a binder resin, a colorant and a release agent with a charge controlling agent in a fluidizing and stirring mixer comprising a rotor having a stirring blade to fix the charge controlling agent on a surface of the toner particles, wherein the stirring and mixing comprises rotating the rotor at a peripheral speed of from 65 to 120 m/s at an environmental temperature (T) in the fluidizing and stirring mixer, satisfying the relationship, Tg-10>T>Tg-35(° C.), where the Tg represents a glass transition temperature of the binder resin.
    Type: Application
    Filed: October 28, 2005
    Publication date: February 23, 2006
    Inventors: Junya Koeda, Kenichi Uehara, Hiroyuki Yoshikawa, Osamu Kouzu
  • Publication number: 20050271159
    Abstract: A frequency modulation apparatus 100 has a synthesizer 101, a differentiator 102 that differentiates phase modulation data and generates differential phase modulation data, an adder 103 that adds together that differential phase modulation data and carrier frequency data fractional part K and generates addition fractional part K1, an input data operation section 104 that receives addition fractional part K1 and carrier frequency data integer part M, generates integer part input data M1 and fractional part input data K2, and provides fractional part input data K2 to synthesizer 101, and an integer part data delay section 105 that delays integer part input data M1 before providing it to synthesizer 101. Input data operation section 104 makes M1=M?1 and K2=K1+1 when K1<0, makes M1=M and K2=K1 when 0?K1<1, and makes M1=M+1 and K2=K1?1 when 1?K1.
    Type: Application
    Filed: March 16, 2005
    Publication date: December 8, 2005
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Hiroyuki Yoshikawa, Hisashi Adachi, Shunsuke Hirano
  • Publication number: 20050236031
    Abstract: A terminal box for a solar battery module is provided with a plurality of terminal plates (30) juxtaposed in a box main body (10) and connectable with positive and negative electrodes of the solar battery module, cables (90) for external connection connectable with the terminal plates (30), a conductor piece (50) connected with one of two corresponding terminal plates (30) and extending from this one terminal plate toward the other, and a bear chip diode (70) held between the conductor piece (50) and the other terminal plate (30) to be connected with both. The conductor piece (50) is connectable with a P-area (72) of the bear chip diode (70) and the other terminal plate (30) is connectable with an N-area (71) of the bear chip diode (70).
    Type: Application
    Filed: April 25, 2005
    Publication date: October 27, 2005
    Applicant: Sumitomo Wiring Systems, Ltd.
    Inventors: Makoto Higashikozono, Kazuki Naito, Hiroyuki Yoshikawa
  • Publication number: 20050230140
    Abstract: A terminal box for a solar battery module is provided with terminal plates (30) connectable with positive and negative electrodes of the solar battery module, cables (91) for external connection connectable with the terminal plates (30), bypass diodes (50) spanning between the adjacent terminal plates (30), and a pair of lead pieces (80) each connected with a corresponding pair of conductor plates (51) provided in the bypass diode (50) and holding a bear chip diode therebetween. The leading ends of horizontal portions (83) of the lead pieces (80) are detachably connected with the corresponding terminal plates (30) by bolts (24).
    Type: Application
    Filed: April 18, 2005
    Publication date: October 20, 2005
    Applicant: Sumitomo Wiring Systems, Ltd.
    Inventors: Makoto Higashikozono, Hiroyuki Yoshikawa
  • Publication number: 20050232385
    Abstract: A two-point frequency modulation apparatus is provided that reduces input timing difference and improves modulation accuracy. Two-point frequency modulation apparatus 10 has: PLL circuit 11; frequency division ratio generator 13 that generates the frequency division ratio in frequency divider 111 based on first digital baseband signal S1 and carrier signal; adder 114 that adds second digital baseband signal S2 to the output signal of loop filter 113; a delay index calculator (filter coefficient calculator 17) that calculates the delay index based on the magnitude of change in the amplitude of the output signal of adder 114; and a delay adjuster (digital filter 18) that shifts the phase of one of first digital baseband signal S1 and second digital baseband signal S2 according to the delay index so as to reduce the phase difference.
    Type: Application
    Filed: February 28, 2005
    Publication date: October 20, 2005
    Applicant: MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
    Inventors: Hiroyuki Yoshikawa, Shunsuke Hirano, Tatsuto Oka
  • Publication number: 20050224110
    Abstract: A terminal box for a solar battery module is provided and has good heat discharging characteristics and good connection reliability. A bypass diode (50) has a mesa bear chip diode (51) and a pair of conductor plates (52) connected with the bear chip diode (51) while holding the bear chip diode (51) therebetween. The respective conductor plates (52) are superimposed on terminal plates (30) juxtaposed on a base plate (11) along their plane direction, and ultrasonic vibration is applied to each superimposed portion (60) to join it with the corresponding terminal plate (30). The conductor plates (52) include an N-conductor plate (52A) that is thicker than a P-conductor plate (52B).
    Type: Application
    Filed: April 12, 2005
    Publication date: October 13, 2005
    Applicant: Sumitomo Wiring Systems, Ltd.
    Inventors: Hiroyuki Yoshikawa, Makoto Higashikozono
  • Publication number: 20050197001
    Abstract: A terminal box for a solar battery module is provided with a plurality of terminal plates (30) juxtaposed on a base plate (11) and connectable with positive and negative electrodes of the solar battery module, cables for external connection connectable with the terminal plates (30), and rectifying-device units (50) each of which spans between two corresponding terminal plates (30). Each rectifying-device unit (50) includes a bypass diode (52) connectable with the two corresponding terminal plates (30) to prevent an inverse current, and a metal-made clip (53) for resiliently holding the bypass diode (52). The clip (53) is held in contact with a heat discharging plate (55) of the bypass diode (52) to discharge heat generated by the bypass diode (52).
    Type: Application
    Filed: May 2, 2005
    Publication date: September 8, 2005
    Applicant: Sumitomo Wiring Systems, Ltd.
    Inventors: Makoto Higashikozono, Hiroyuki Yoshikawa, Masuhiro Kiryu
  • Patent number: 6840799
    Abstract: A cable connector is provided that can accomplish routing of cables in a narrow space in connecting solar cell modules to each other. A plurality of solar cell modules having solar cells embedded in a building material are installed on a base board. A positive cable and a negative cable extend from the solar cell module. A first connector is connected to a an end of one cable. A second connector is connected to an end of the other cable. The first connector and the second connector have a flat outer configuration and are connected to each other, with a thickness direction of the first connector and that of the second connector substantially coincident with each other. Each of the first connector and the second connector is connected to the respective flat cable with a thickness direction of the connector substantially coincident with that of the flat cable.
    Type: Grant
    Filed: April 15, 2003
    Date of Patent: January 11, 2005
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Hiroyuki Yoshikawa, Makoto Higashikozono
  • Patent number: 6828503
    Abstract: Connecting terminals (25a to 25d) are accommodated side by side in a terminal box casing (21). Diodes (30a to 30c) are connected electrically between the respective connecting terminals (25a to 25d). The diodes (30a to 30c) are connected in series via the intermediate terminal mounts (28a, 28b). Partition walls (24) for partitioning diode accommodation spaces (23a to 23c) for at least partly accommodating the diodes (30a to 30c) are formed in the terminal box casing (21).
    Type: Grant
    Filed: January 8, 2004
    Date of Patent: December 7, 2004
    Assignee: Sumitomo Wiring Systems, Ltd.
    Inventors: Hiroyuki Yoshikawa, Makoto Higashikuzono, Tadashi Sugino
  • Publication number: 20040177987
    Abstract: Connecting terminals (25a to 25d) are accommodated side by side in a terminal box casing (21). Diodes (30a to 30c) are connected electrically between the respective connecting terminals (25a to 25d). The diodes (30a to 30c) are connected in series via the intermediate terminal mounts (28a, 28b). Partition walls (24) for partitioning diode accommodation spaces (23a to 23c) for at least partly accommodating the diodes (30a to 30c) are formed in the terminal box casing (21).
    Type: Application
    Filed: January 8, 2004
    Publication date: September 16, 2004
    Applicant: Sumitomo Wiring Systems, Ltd.
    Inventors: Hiroyuki Yoshikawa, Makoto Higashikuzono, Tadashi Sugino
  • Patent number: 6790575
    Abstract: A two component developer comprising a magnetic toner containing a binder resin and a magnetic particle, and a magnetic carrier containing a magnetic particle, wherein the magnetic toner has an average particle diameter of 4.0 to 10.0 &mgr;m, and contains 5 to 80 No. % of toner particles having particle diameter of 5 &mgr;m or less, and exhibits magnetization of 10 to 25 emu/g under magnetic field of 5 kiloersteds.
    Type: Grant
    Filed: March 21, 2002
    Date of Patent: September 14, 2004
    Assignee: Ricoh Company, Ltd.
    Inventors: Fumihiro Sasaki, Hiroaki Matsuda, Bing Shu, Maiko Kondo, Hiroshi Nakai, Hiroto Higuchi, Yasuaki Iwamoto, Yoshihiro Suguro, Hiroyuki Yoshikawa, Masahide Yamashita, Kazuyuki Yazaki