Patents by Inventor Masaki Yamashita
Masaki Yamashita 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).
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Publication number: 20100302670Abstract: To provide a disk drive capable of inhibiting the occurrence of acoustic noise caused by a voltage pulse when the head is retracted using a speed control method using voltage obtained by rectifying a back electromotive force after the power source has been cut off from the rotation of a spindle motor. Retraction control circuit is used to control the on and off modes of transistors in accordance with the speed of VCM. The voltage across VCM becomes a voltage that can be regulated with VCM voltage control circuit. At this time, voltage is supplied to the terminals based on the voltage of ISO5V that is the rectified voltage of the back electromotive force of the spindle motor and the pulsating voltage is synchronized and produced at both terminals. As a result, the potential difference across VCM is such that the pulsating voltage is negated and acoustic noise is inhibited.Type: ApplicationFiled: March 10, 2010Publication date: December 2, 2010Inventors: Masaki Yamashita, Chisako Ota, Nobuhiko Wasa
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Publication number: 20100304594Abstract: A plate-like connection target is inserted into a connector along a first direction. The connector has a first metal member having a first metal abutment portion, a second metal member having a second metal abutment portion, and an actuator operable to push the second metal abutment portion toward the first metal abutment portion for holding the plate-like connection target between the first metal abutment portion and the second metal abutment portion in a second direction perpendicular to the first direction in a state in which the plate-like connection target has been inserted in the connector.Type: ApplicationFiled: April 30, 2010Publication date: December 2, 2010Applicant: JAPAN AVIATION ELECTRONICS INDUSTRY, LIMITEDInventors: Hiroyuki Yokoo, Masaki Yamashita
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Publication number: 20100167598Abstract: A socket contact is configured to receive a part of a mating contact. The socket contact comprises a spring portion, a spring support portion and a lance. The spring portion is brought into contact with the mating contact when the socket contact receives the part of the mating contact. The spring support portion supports the spring portion. The lance is provided on the spring support portion.Type: ApplicationFiled: October 23, 2009Publication date: July 1, 2010Inventors: Masaki Yamashita, Kazuhito Hisamatsu, Yosuke Honda
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Patent number: 7737968Abstract: Games are processed in a more realistic and immediate manner during image processing for soccer games and the like. Specifically, the movements of characters more accurately simulate those of actual opponents, resulting in greater game realism. The invention is an image processing device for imaging and displaying the behavior of characters modeled on opponents in virtual three-dimensional space. It is determined (S21 to S24) whether or not there exists a certain situation in which the relation to the game contents (in the centering area, for example) or the positional relation (such as distance) between characters and a target (such as opponent characters or the ball) having a relation through the game to said characters matches certain conditions, and the eyes of the characters are directed to the target (S25, S26, S28, etc.) when it is determined that the certain situation exists. The invention is especially suitable for soccer games.Type: GrantFiled: December 8, 2008Date of Patent: June 15, 2010Assignee: Kabushiki Kaisha SEGAInventors: Norio Haga, Tadanobu Numata, Satoshi Mifune, Makoto Yamamoto, Kaori Yamamoto, Masaki Yamashita
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Patent number: 7699642Abstract: In a connector including a connector body capable of being connected to or disconnected from a connecting object in a first direction, the connector body has, in a second direction perpendicular to the first direction, a particular dimension greater than a dimension thereof in a third direction perpendicular to the first and second directions. A locking portion is coupled to the connector body for locking the connecting object. The the locking portion is adapted to release locking of the connecting object with movement thereof in the second direction. An operating portion is coupled to the connector body and adapted to engage with the locking portion. The operating portion is adapted to move the locking portion in the second direction according to movement thereof in the third direction.Type: GrantFiled: December 17, 2008Date of Patent: April 20, 2010Assignee: Japan Aviation Electronics Industry, LimitedInventors: Masaki Yamashita, Takeshi Shindo
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Publication number: 20100067140Abstract: One embodiment of the invention includes a voice coil motor (VCM) drive system. The system includes a VCM configured to move a read/write head across a magnetic disk in response to a current flow through the VCM. The system also includes a VCM output stage configured to direct the current through the VCM in one of a first direction corresponding to retraction of the read/write head and a second direction corresponding to extension of the read/write head in response to switching control signals. The system further includes a retract controller configured to control a retraction velocity of the read/write head by generating the switching control signals to provide the current in the first direction to increase the retraction velocity of the read/write head and to provide the current in the second direction to decrease the retraction velocity of the read/write head during a retraction mode of the VCM drive system.Type: ApplicationFiled: September 15, 2008Publication date: March 18, 2010Inventors: Masaki Yamashita, Chisako Ota
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Publication number: 20100064809Abstract: Systems and methods are provided for determining mechanical resonance of a sensor. In one embodiment, a system is provided that comprises a bias voltage source configured to apply a bias voltage impulse signal to a terminal of the sensor and a zero crossing detector configured to detect zero crossing cycles of a sensor output signal response to the bias voltage impulse signal. The system further comprises a controller configured to determine the resonance frequency of the sensor based on the detected zero crossing cycles of the sensor output signal response.Type: ApplicationFiled: September 13, 2008Publication date: March 18, 2010Inventors: Kenji Toga, Masaki Yamashita
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Publication number: 20100053802Abstract: One embodiment of the invention includes a disk-drive motor control system. The system comprises a seek mode power supply configured to provide a first voltage corresponding to a seek mode associated with a disk-drive voice control motor (VCM). The system also includes a track mode power supply configured to provide a second voltage corresponding to a tracking mode associated with the disk-drive VCM. The first voltage can be greater than the second voltage. The system further includes a disk-drive motor driver configured to provide a current to the disk-drive VCM at a first magnitude in the seek mode based on the first voltage, at a second magnitude in the tracking mode based on the second voltage, and at a third magnitude in a head-retraction mode.Type: ApplicationFiled: August 27, 2008Publication date: March 4, 2010Inventor: Masaki Yamashita
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Patent number: 7670150Abstract: An electrical connector mountable to a circuit board is disclosed. The disclosed connector includes a shell which comprises a first plate-like portion, a second plate-like portion and connection portions. The first plate-like portion extends in a predetermined direction and is provided with fixed portions at opposite ends thereof in the predetermined direction. The fixed portion is to be fixed to the circuit board. The second plate-like portion extends in the predetermined direction. Each of the connection portions connects the first and the second plate-like portion. The second plate-like portion is provided with force resist portions at opposite ends thereof in the predetermined direction. The force resist portions are configured so that, when a force is applied to the electrical connector along a direction from the first plate-like portion towards the second plate-like portion, the force resist portions resist the force.Type: GrantFiled: June 12, 2008Date of Patent: March 2, 2010Assignee: Japan Aviation Electronics Industry, LimitedInventors: Kazuhito Hisamatsu, Masaki Yamashita, Takahiro Yamaji, Tatsuya Shioda
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Patent number: 7649330Abstract: A disk drive system including retract logic for control of the voice coil motor in a retract operation, in which the voice coil motor positions the read/write head actuator arm in a safe place in a loss-of-power event, is disclosed. The retract logic includes circuitry for controlling the application of power to the voice coil motor from an external capacitor in a pulse-width modulated manner. Current from the capacitor is coupled to the voice coil motor in a drive phase of the pulse-width modulation cycle, and is recirculated through the voice coil motor in a complementary phase of the pulse-width modulation cycle. The recirculation is accomplished by a recirculation transistor that is smaller than the pull-down transistor used in the drive phase.Type: GrantFiled: June 6, 2007Date of Patent: January 19, 2010Assignee: Texas Instruments IncorporatedInventors: Masaki Yamashita, Chisako Ota, Naoyuki Tsuruoka
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Publication number: 20090170357Abstract: In a connector including a connector body capable of being connected to or disconnected from a connecting object in a first direction, the connector body has, in a second direction perpendicular to the first direction, a particular dimension greater than a dimension thereof in a third direction perpendicular to the first and second directions. A locking portion is coupled to the connector body for locking the connecting object. The the locking portion is adapted to release locking of the connecting object with movement thereof in the second direction. An operating portion is coupled to the connector body and adapted to engage with the locking portion. The operating portion is adapted to move the locking portion in the second direction according to movement thereof in the third direction.Type: ApplicationFiled: December 17, 2008Publication date: July 2, 2009Inventors: Masaki Yamashita, Takeshi Shindo
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Patent number: 7532211Abstract: Games are processed in a more realistic and immediate manner during image processing for soccer games and the like. Specifically, the movements of characters more accurately simulate those of actual opponents, resulting in greater game realism. The invention is an image processing device for imaging and displaying the behavior of characters modeled on opponents in virtual three-dimensional space. It is determined (S21 to S24) whether or not there exists a certain situation in which the relation to the game contents (in the centering area, for example) or the positional relation (such as distance) between characters and a target (such as opponent characters or the ball) having a relation through the game to said characters matches certain conditions, and the eyes of the characters are directed to the target (S25, S26, S28, etc.) when it is determined that the certain situation exists. The invention is especially suitable for soccer games.Type: GrantFiled: June 30, 2005Date of Patent: May 12, 2009Assignee: Kabushiki Kaisha Sega EnterprisesInventors: Norio Haga, Tadanobu Numata, Satoshi Mifune, Makoto Yamamoto, Kaori Yamamoto, Masaki Yamashita
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Publication number: 20090115781Abstract: Games are processed in a more realistic and immediate manner during image processing for soccer games and the like. Specifically, the movements of characters more accurately simulate those of actual opponents, resulting in greater game realism. The invention is an image processing device for imaging and displaying the behavior of characters modeled on opponents in virtual three-dimensional space. It is determined (S21 to S24) whether or not there exists a certain situation in which the relation to the game contents (in the centering area, for example) or the positional relation (such as distance) between characters and a target (such as opponent characters or the ball) having a relation through the game to said characters matches certain conditions, and the eyes of the characters are directed to the target (S25, S26, S28, etc.) when it is determined that the certain situation exists. The invention is especially suitable for soccer games.Type: ApplicationFiled: December 8, 2008Publication date: May 7, 2009Applicant: SEGA ENTERPRISES, LTD.Inventors: Norio HAGA, Tadanobu NUMATA, Satoshi MIFUNE, Makoto YAMAMOTO, Kaori YAMAMOTO, Masaki YAMASHITA
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Publication number: 20090011623Abstract: An electrical connector mountable to a circuit board is disclosed. The disclosed connector includes a shell which comprises a first plate-like portion, a second plate-like portion and connection portions. The first plate-like portion extends in a predetermined direction and is provided with fixed portions at opposite ends thereof in the predetermined direction. The fixed portion is to be fixed to the circuit board. The second plate-like portion extends in the predetermined direction. Each of the connection portions connects the first and the second plate-like portion. The second plate-like portion is provided with force resist portions at opposite ends thereof in the predetermined direction. The force resist portions are configured so that, when a force is applied to the electrical connector along a direction from the first plate-like portion towards the second plate-like portion, the force resist portions resist the force.Type: ApplicationFiled: June 12, 2008Publication date: January 8, 2009Inventors: Kazuhito Hisamatsu, Masaki Yamashita, Takahiro Yamaji, Tatsuya Shioda
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Publication number: 20080207618Abstract: The present invention relates to a compound represented by the following formula [I] wherein each symbol is as defined in the specification, or a pharmaceutically acceptable salt thereof, or a solvate thereof, and a pharmaceutical composition, an anti-HIV agent and an HIV integrase inhibitor containing such compound. The compound of the present invention has an HIV integrase inhibitory activity, and is useful as an anti-HIV agent, or as an agent for the prophylaxis or treatment of AIDS. In addition, by the combined use with other anti-HIV agents such as a protease inhibitor, a reverse transcriptase inhibitor and the like, it can be a more effective anti-HIV agent. Because it shows integrase-specific high inhibitory activity, the compound can be a pharmaceutical agent safe on human body, which causes only a fewer side effects.Type: ApplicationFiled: June 22, 2007Publication date: August 28, 2008Inventors: Motohide SATOH, Hisateru Aramaki, Masaki Yamashita, Masafumi Inoue, Hiroshi Kawakami, Hisashi Shinkai, Hiroshi Nakamura, Yuji Matsuzaki, Shuichi Wamaki
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Patent number: 7309254Abstract: In a connector to be mounted to a substrate, a strengthening member is coupled to a housing holding a contact The strengthening member is adapted to fix the housing to the substrate and includes a side plate portion extending in a direction away from the substrate in a state where the connector is mounted to the substrate, a top plate portion adjacent to the side plate portion and faced to the substrate, and first and second mounting portions to be attached to the substrate, The first mounting portion extends from an end of the side plate portion adjacent to the substrate in a widthwise direction of the housing perpendicular to a fitting direction in which a mating connector is fitted to the connector. The second mounting portion extends from the top plate portion at a side opposite to a fitting side to be fitted to the mating connector.Type: GrantFiled: September 29, 2006Date of Patent: December 18, 2007Assignee: Japan Aviation Electronics Industry LimitedInventors: Mamoru Suzuki, Masaki Yamashita, Kazukuni Hisatomi, Kazuhito Hisamatsu
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Publication number: 20070285828Abstract: A disk drive system including retract logic for control of the voice coil motor in a retract operation, in which the voice coil motor positions the read/write head actuator arm in a safe place in a loss-of-power event, is disclosed. The retract logic includes circuitry for controlling the application of power to the voice coil motor from an external capacitor in a pulse-width modulated manner. Current from the capacitor is coupled to the voice coil motor in a drive phase of the pulse-width modulation cycle, and is recirculated through the voice coil motor in a complementary phase of the pulse-width modulation cycle. The recirculation is accomplished by a recirculation transistor that is smaller than the pull-down transistor used in the drive phase.Type: ApplicationFiled: June 6, 2007Publication date: December 13, 2007Applicant: TEXAS INSTRUMENTS INCORPORATEDInventors: Masaki Yamashita, Chisako Ota, Naoyuki Tsuruoka
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Patent number: D603806Type: GrantFiled: April 29, 2009Date of Patent: November 10, 2009Assignee: Japan Aviation Electronics Industry LimitedInventors: Masaki Yamashita, Kazuhito Hisamatsu, Yosuke Honda
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Patent number: D610546Type: GrantFiled: May 1, 2009Date of Patent: February 23, 2010Assignee: Japan Aviation Electronics Industry, LimitedInventors: Yosuke Honda, Kazuhito Hisamatsu, Masaki Yamashita
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Patent number: D610995Type: GrantFiled: May 1, 2009Date of Patent: March 2, 2010Assignee: Japan Aviation Electronics Industry, LimitedInventors: Yosuke Honda, Kazuhito Hisamatsu, Masaki Yamashita