Patents by Inventor Shigeo Hayashi

Shigeo Hayashi 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).

  • Packet processing device and method
    Patent number: 7602801
    Abstract: There is provided a packet processing device for, when decoding variable length data that is split into packets, realizing a reduction in processing load at a decoder, by providing information for identifying a start position of the data. A header analyzing section (11) determines whether data stored in a packet is start data containing start information or other data. A data extracting section (12) extracts data from a packet and stores the data in a buffer (13). A buffer controlling section (14) causes a start position memory (15) and a number-of-starts counter (16) to retain an address position and the number of start data stored in the buffer (13). A decode section (20) refers to the start position memory (15) and the number-of-starts counter (16) and executes a decode process for the data stored in the buffer (13).
    Type: Grant
    Filed: June 7, 2004
    Date of Patent: October 13, 2009
    Assignee: Panasonic Corporation
    Inventors: Shigeo Hayashi, Eiji Watanabe, Hidekatsu Ozeki
  • ELECTRONIC APPARATUS
    Publication number: 20090168378
    Abstract: According to an aspect of the present invention, there is provided an electronic apparatus including: a wiring that is formed on a mounting surface; a terminal that is electrically connected with the wiring; a terminal holder that is disposed above the mounting surface to face the wiring and that holds the terminal in a space between the terminal; and a blocking member that is disposed on the terminal holder at a side facing the mounting surface, that surrounds the terminal and that is separated from the mounting surface to regulate a gap between blocking member and the mounting surface so that the terminal is prevented from passing therethrough when the terminal is broken off from the terminal holder.
    Type: Application
    Filed: August 27, 2008
    Publication date: July 2, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koichiro TAKEGUCHI, Shigeo HAYASHI
  • Optical transceiver having optical receiver with function to cancel noise originated to optical transmitter
    Patent number: 7555218
    Abstract: An optical transceiver is disclosed, in which a noise attributed to the large current switching in the optical transmitter and superposed on the signal line in the optical receiver is effectively eliminated. The optical transceiver includes a noise generator and a delay circuit. The noise generator generates a compensation signal from the input signal of the optical transmitter. The compensation signal, having the same waveform and the phase with the noise superposed on the signal line, is input in the main amplifier. Since the phase of noise is delayed by the delay circuit, the main amplifier may cancel the noise as the common mode noise.
    Type: Grant
    Filed: November 30, 2005
    Date of Patent: June 30, 2009
    Assignee: Sumitomo Electric Industries Ltd.
    Inventor: Shigeo Hayashi
  • BRUSHLESS MOTOR
    Publication number: 20090146598
    Abstract: A brushless motor driven by a sensorless driving circuit includes a rotating body capable of being rotated about a center axis; a rotor magnet arranged coaxially with the rotating body; a stator disposed opposite the rotor magnet; and at least one coil wound around the stator. The brushless motor is driven according to a signal containing a third harmonic component relative to a fundamental wave component in an induced electromotive force. Further, an amplitude ratio of the third harmonic component to the fundamental wave component in the induced electromotive force generated in the coil preferably is about 1% or higher.
    Type: Application
    Filed: December 4, 2008
    Publication date: June 11, 2009
    Applicant: NIDEC CORPORATION
    Inventors: Shigeo HAYASHI, Yosuke KAWANO, Satoshi KOMATSU
  • ELECTRONIC EQUIPMENT
    Publication number: 20090103256
    Abstract: An electronic equipment includes: a main unit that is provided with a printed circuit board; a display unit that is provided with a display device; a hinge mechanism that is provided with a rotation shaft that connects the display unit to the main unit to be rotatable between a first position where the display unit is opened relative to the main unit and a second position where the display unit is closed relative to the main unit; an urging mechanism that urges the display unit toward the second position at a position between the first position and the second position; and a relaxation mechanism that is provided separately from the urging mechanism and relaxes an urging force applied to the display unit by the urging mechanism.
    Type: Application
    Filed: June 6, 2008
    Publication date: April 23, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koichiro Takeguchi, Shigeo Hayashi
  • MOTOR PROVIDED WITH CHUCKING DEVICE AND DISK DRIVING DEVICE EQUIPPED WITH THE MOTOR
    Publication number: 20090096303
    Abstract: A motor includes a rotating body including a magnet, and a fixed body including a stator. The stator includes a stator core having an annular core back portion with an upper and a lower surface, and a plurality of circumferentially spaced-apart tooth portions extending from the core back portion in a direction away from the rotational axis, and a plurality of coils provided by winding a conductive wire around the tooth portions of the stator core with multiple turns. The rotor holder is arranged axially above the stator to cover the stator. Further, an annular or arc-shaped attracting magnet arranged to attract the rotor holder toward the stator is arranged radially inwardly of the core back portion, the attracting magnet having an upper surface axially facing toward the rotor holder, and a lower surface arranged axially below the upper surface of the core back portion of the stator core.
    Type: Application
    Filed: October 16, 2008
    Publication date: April 16, 2009
    Applicant: NIDEC CORPORATION
    Inventors: Hitoshi TAKAKI, Shigeo HAYASHI, Yusuke IWAI, Nobuaki YASUMOTO, Yosuke KAWANO
  • ELECTRONIC DEVICE
    Publication number: 20090085817
    Abstract: According to one embodiment, an electronic device is provided with the following an antenna, a first radio module configured to perform wireless communications by use of the antenna, a second radio module configured to perform wireless communications by use of the antenna, a first printed circuit board with reference to which the second radio module is attachable or detachable, a first cable which connects the antenna and the second radio module together, a second cable which connects the second radio module and the first radio module together, and a connection mechanism which connects the first and second cables together in a state where the second radio module is detached from the first printed circuit board.
    Type: Application
    Filed: December 8, 2008
    Publication date: April 2, 2009
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Koichiro Takeguchi, Shigeo Hayashi
  • Transmitter optical subassembly and a transmitter optical module installing the same
    Patent number: 7483460
    Abstract: To provide a transmitter optical subassembly that provides an enhanced high-frequency response without increasing the power consumption within a CAN-type package. The transmitter optical subassembly includes a semiconductor laser diode, an auxiliary circuit, and a package for installing the semiconductor laser diode and the auxiliary circuit. The auxiliary circuit generates a transient signal synchronized with the leading edge or falling edge of a driving signal for the semiconductor laser diode in an electrode of the semiconductor laser diode for a very short period in order to boost the response speed of the semiconductor laser diode. The auxiliary circuit operated intermittently so that it is not necessary to consider heat caused by the auxiliary circuit even in case the auxiliary circuit is installed in the package.
    Type: Grant
    Filed: August 1, 2006
    Date of Patent: January 27, 2009
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Shigeo Hayashi
  • Optical transceiver
    Patent number: 7483638
    Abstract: The present invention provides an optical transceiver that enables to reduce the crosstalk from the optical transmitter to the optical receiver. The regenerator of the optical transceiver includes two main amplifiers, a selector, a selector control, and a re-shaper for shaping the receiving signal selected by the selector. The first main amplifier provides a first amplifier and a delay circuit connected in upstream to the first amplifier. The second main amplifier provides a second amplifier and a delay circuit connected in downstream to the second amplifier. The selector selects, based on the phase difference between the receiving signal Rx and the transmitting signal Tx, the output from the first main amplifier or that from the second main amplifier.
    Type: Grant
    Filed: March 7, 2006
    Date of Patent: January 27, 2009
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Shigeo Hayashi
  • Multi-gradation monochromatic image display method, multi-gradation monochromatic image display device, computer, monochromatic display device, re-conversion adapter, and video card
    Patent number: 7483568
    Abstract: A monochromatic image of which the number of gradation levels (for example, 1024 levels) is greater than that (for example, 256) of a monochromatic image viably handled by an operating system (OS) (13) is converted into a color image which is then received by the OS (13). The color image to be handled by the OS (13) is embraced by the number of available colors (for example, 16,777,216) and can thus be released out directly. The color image released from the OS (13) is then converted into a monochromatic image of which the number of gradation levels (for example, 1021 or 1024) is greater than that (for example, 256) of a monochromatic image viably handled by the OS (13) before displayed. Accordingly, the monochromatic image can be displayed at multiple gradation levels which exceed the gradation limit of any conventional operating system without drastically modifying the hardware or software.
    Type: Grant
    Filed: October 5, 2005
    Date of Patent: January 27, 2009
    Assignee: Totoku Electric Co., Ltd.
    Inventors: Shigeo Hayashi, Kazuaki Kiuchi, Tatumi Naganuma
  • Electronic device
    Patent number: 7463203
    Abstract: According to one embodiment, an electronic device is provided with the following an antenna, a first radio module configured to perform wireless communications by use of the antenna, a second radio module configured to perform wireless communications by use of the antenna, a first printed circuit board with reference to which the second radio module is attachable or detachable, a first cable which connects the antenna and the second radio module together, a second cable which connects the second radio module and the first radio module together, and a connection mechanism which connects the first and second cables together in a state where the second radio module is is detached from the first printed circuit board.
    Type: Grant
    Filed: August 24, 2007
    Date of Patent: December 9, 2008
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koichiro Takeguchi, Shigeo Hayashi
  • Vehicle network system
    Publication number: 20080259946
    Abstract: A vehicle network system is provided with a plurality of star networks, a plurality of devices mounted on a vehicle are connected in a star shape through respective branch lines in each of the star networks, and a trunk line for connecting the plurality of star networks, the branch lines are communication lines for optical communications, and the trunk line is a communication line for electric communication.
    Type: Application
    Filed: February 29, 2008
    Publication date: October 23, 2008
    Applicants: AUTONETWORKS TECHNOLOGIES, LTD., TOYOTA JIDOSHA KABUSHIKI KAISHA, SUMITOMO WIRING SYTEMS, LTD., SUMITOMO ELECTRIC INDUSTRIES, LTD.
    Inventors: Hideki Goto, Manabu Kagami, Seigo Takai, Hayato Yuuki, Shigeo Hayashi
  • Optical transmitter with a least pair of semiconductor laser diodes
    Patent number: 7415053
    Abstract: The present invention is to provide an optical transmitter with reduced power consumption. The optical transmitter includes two laser diodes connected in series to each other, one of which is connected in the anode thereof to the first driver, while the other of which is connected in the cathode thereof to the second driver. Further, between the anode of the first laser diode and the cathode of the second laser diode connects an impedance device. In the present invention, the first and second laser diodes, and the impedance device have the substantially same impedance to each other within a concerned frequency range.
    Type: Grant
    Filed: March 6, 2006
    Date of Patent: August 19, 2008
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventor: Shigeo Hayashi
  • Electronic Device
    Publication number: 20080129609
    Abstract: According to one embodiment, an electronic device is provided with the following an antenna, a first radio module configured to perform wireless communications by use of the antenna, a second radio module configured to perform wireless communications by use of the antenna, a first printed circuit board with reference to which the second radio module is attachable or detachable, a first cable which connects the antenna and the second radio module together, a second cable which connects the second radio module and the first radio module together, and a connection mechanism which connects the first and second cables together in a state where the second radio module is is detached from the first printed circuit board.
    Type: Application
    Filed: August 24, 2007
    Publication date: June 5, 2008
    Inventors: Koichiro Takeguchi, Shigeo Hayashi
  • Lens barrel
    Patent number: 7372638
    Abstract: There is disclosed a lens barrel including a fixed frame, a rotary frame rotatable with respect to the fixed frame to advance or retract in an optical axis direction, and a rectilinear guide frame rotatable relative to the rotary frame to displace integrally with the rotary frame in the optical axis direction. In this structure, a front end portion of the rectilinear guide frame on a subject side in the optical axis direction is exposed from the rotary frame.
    Type: Grant
    Filed: January 24, 2007
    Date of Patent: May 13, 2008
    Assignee: Olympus Imaging Corp.
    Inventors: Manabu Yoshii, Sayoko Okabe, Akira Watanabe, Yasuteru Yamauchi, Shigeo Hayashi
  • Optical receiver
    Patent number: 7366428
    Abstract: An optical receiver includes a light-receiving part and a control part. The light-receiving part includes an APD, a PIN-PD, and a branching optical device. First signal light is incident on the light-receiving part and is divided into second signal light and third signal light which are incident on the APD and the PIN-PD, respectively, by the branching optical device. Due to this structure, the third signal light is incident on the PIN-PD without the quantity thereof being varied depending on the polarization state of the first signal light. The control part generates a supply voltage at which a desired avalanche multiplication factor is obtained in the APD on the basis of the output current from the PIN-PD. According to the above-described structure, the avalanche multiplication factor of the APD is accurately controlled on the basis of the output current of the PIN-PD.
    Type: Grant
    Filed: September 14, 2004
    Date of Patent: April 29, 2008
    Assignee: Sumitomo Electric Indutries, Ltd.
    Inventors: Yoshiki Kuhara, Mitsuaki Nishie, Shigeo Hayashi
  • Driving circuit using probability density function
    Publication number: 20080084904
    Abstract: The present invention provides a laser diode driving circuit that enables to precisely control the amplitude of the driving current with suppressing the overshoot and the undershoot appeared in the monitor signal of the optical output from the laser diode. The driving circuit of the invention includes a signal mixer, a comparator, an averaging unit and a current generator. The signal mixer superposes an additional signal on the monitor signal. The amplitude of the additional signal varies in accordance with a preset distribution function. The comparator compares thus superposed signal with a reference level and outputs a binary signal. The averaging unit integrates this binary signal and the current generator provides the driving current based on the averaged binary signal.
    Type: Application
    Filed: September 26, 2007
    Publication date: April 10, 2008
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventor: Shigeo Hayashi
  • Laser diode driver able to precisely control the driving current
    Publication number: 20080063018
    Abstract: The present invention provides a laser diode driver (LD-driver) able to precisely control the driving current reducing the influence of the overshoot and undershoot of the monitored signal. The LD-driver includes a photodiode (PD), an I/V-converter (I/V-C), a comparator, an integrator, a processing unit, and a current source. The PD generates the photocurrent, the I/V-C converts the photocurrent to a voltage signal, the comparator compares the voltage signal coupled by the AC-mode with a threshold, and the integrator integrates the output of the comparator. The processing unit, based on the output of the integrator, controls the driving current. In the LD-driver, the output of the integrator only determines the control mode, namely, the increment or the decrement of the current, the magnitude of the change in the driving current and its speed are given by the present conditions.
    Type: Application
    Filed: September 4, 2007
    Publication date: March 13, 2008
    Applicant: Sumitomo Electric Industries, Ltd.
    Inventor: Shigeo Hayashi
  • Photodetector and optical receiver
    Patent number: 7326905
    Abstract: An optical receiver is provided with an optical-signal-receiving section and a controlling section. The optical-signal-receiving section incorporates a photodetector. The photodetector has an APD. Through a passivation film, a photoconductor is placed on a portion of a surface of the APD which remains unoccupied by an optical-signal-receiving area of the APD. When this structure is employed, the signal for controlling the avalanche multiplication factor of the APD can be obtained from the photoconductor. Consequently, the signal can be obtained with a simple structure. Furthermore, the photoconductor has a good linearity of the output current even to a weak lightwave. As a result, the output current I for controlling the avalanche multiplication factor of the APD can be obtained with high accuracy.
    Type: Grant
    Filed: December 7, 2004
    Date of Patent: February 5, 2008
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yoshiki Kuhara, Mitsuaki Nishie, Shigeo Hayashi
  • Optical module and an optical receiver using the same
    Patent number: 7315698
    Abstract: The present invention provides an optical receiver that uses an avalanche photodiode (APD) whose multiplication factor m is controlled to compensate the temperature dependence thereof. An optical module of the present invention includes a light-receiving device in addition to the APD. The light-receiving device may be a semiconductor thin film or a PIN photodiode, and is disposed in front of the APD. Accordingly, the light-receiving device receives a portion of signal light, and transmits a rest portion thereof. The APD receives the rest portion of the signal light. The bias voltage applied to the APD is so controlled that a first photocurrent generated in the light-receiving device and a second photocurrent generated in the APD maintain a constant ratio.
    Type: Grant
    Filed: October 21, 2004
    Date of Patent: January 1, 2008
    Assignee: Sumitomo Electric Industries, Ltd.
    Inventors: Yoshiki Kuhara, Mitsuaki Nishie, Shigeo Hayashi