Patents by Inventor Yutaka Ozawa

Yutaka Ozawa 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: 6853512
    Abstract: A data storage device that can perform a track following process even when vibrations are produced by a wide range of frequencies.
    Type: Grant
    Filed: September 20, 2002
    Date of Patent: February 8, 2005
    Assignee: International Business Machines Corporation
    Inventor: Yutaka Ozawa
  • Publication number: 20040190187
    Abstract: A rotating storage apparatus is provided for high recording reliability in an environment in which a shock or vibration exists. Provided are means for outputting a shock out signal (SO) if an output from an acceleration sensor exceeds a predetermined threshold, a latch circuit 21 for outputting a latch signal at high level during a predetermined write inhibit period after the shock out signal (SO) is input, and a write gate signal (WG) which goes high when a write is enabled. A write enable signal is generated by an AND circuit 23 having a NOT output of the latch signal as well as the write gate signal WO as its inputs.
    Type: Application
    Filed: March 3, 2004
    Publication date: September 30, 2004
    Inventors: Masashi Kisaka, Yutaka Ozawa, Kenji Toga
  • Patent number: 6768481
    Abstract: An ON/OFF control signal 105 directive of turning ON in a transmissive display mode or turning OFF in a reflective display mode is output by an ON/OFF state controlling means 111 to a light source 115. The ON/OFF control signal 105 is also output to a data signal converting means 104, and the data signal converting means 104 converts a data signal 102 into a data signal 103 in synchronization with the switching of ON and OFF of the light source 115 so as to prevent positive-negative inversion of the display on a liquid crystal panel 114. A data signal potential supplying means 112 supplies a potential of a data signal based on the data signal 103 to a data signal line 113 so as to drive the liquid crystal panel 114.
    Type: Grant
    Filed: July 22, 2002
    Date of Patent: July 27, 2004
    Assignee: Seiko Epson Corporation
    Inventors: Yutaka Ozawa, Akira Inoue, Katsunori Yamazaki, Tsuyoshi Maeda, Chiyoaki Iijima
  • Patent number: 6754021
    Abstract: A rotating storage apparatus is provided for high recording reliability in an environment in which a shock or vibration exists. Provided are means for outputting a shock out signal (SO) if an output from an acceleration sensor exceeds a predetermined threshold, a latch circuit 21 for outputting a latch signal at high level during a predetermined write inhibit period after the shock out signal (SO) is input, and a write gate signal (WG) which goes high when a write is enabled. A write enable signal is generated by an AND circuit 23 having a NOT output of the latch signal as well as the write gate signal WG as its inputs.
    Type: Grant
    Filed: March 19, 2001
    Date of Patent: June 22, 2004
    Assignee: International Business Machines Corporation
    Inventors: Masashi Kisaka, Yutaka Ozawa, Kenji Toga
  • Patent number: 6747832
    Abstract: A disk drive has a data recording medium such as a disk, a spindle motor for rotating the disk, disk rotation speed controlling logics for supplying a spindle current to the above described spindle motor to rotate the disk at a constant speed, a head unit for accessing the disk, an actuator for moving the head unit, and head position controlling logics for driving the actuator and controlling the position of the head unit. The head position controlling logic obtains the value of the spindle current and controls the position of the head unit on the basis of the above described spindle current value by using the fact that the spindle current varies according to variations in the position of the head unit.
    Type: Grant
    Filed: March 27, 2001
    Date of Patent: June 8, 2004
    Assignee: Hitachi Global Storage Technologies Netherlands, B.V.
    Inventors: Masashi Kisaka, Yutaka Ozawa, Kenji Toga
  • Publication number: 20040100756
    Abstract: An aluminum electrolytic capacitor has a capacitor element provided with an anode lead terminal and a cathode side lead terminal, a bottomed shield containing the capacitor element and a sealing rubber sealing an opening of the bottomed shield. The number of lead terminals of anode side and cathode side lead terminals, respective lead terminal being drawn out onto the same level of the bottomed shield, is selected from a number range of 2 to 4.
    Type: Application
    Filed: November 10, 2003
    Publication date: May 27, 2004
    Applicant: FUJITSU MEDIA DEVICES LIMITED
    Inventors: Masayoshi Koizumi, Junkichi Mabe, Yutaka Ozawa, Katsuharu Yamada
  • Patent number: 6722962
    Abstract: Disclosed is a polishing system used for polishing a surface to be polished of an object to be polished by a polishing pad, which is capable of improving uniformity of the surface to be polished of the object to be polished by positively, accurately adjusting a polishing pressure, and a polishing method using the polishing system. Concretely, the surface to be polished of a wafer as the object to be polished is polished by relatively moving, along a plane, a polishing surface of the rotating polishing pad and the surface to be polished of the wafer in slide-contact with each other, and adjusting a pressing force applied from the polishing pad to the wafer in accordance with a polishing pressure previously set depending on a relative-positional relationship between the polishing surface of the polishing pad and the surface to be polished of the wafer.
    Type: Grant
    Filed: October 2, 2000
    Date of Patent: April 20, 2004
    Assignee: Sony Corporation
    Inventors: Shuzo Sato, Hiizu Ohtorii, Yasuharu Ohkawa, Yutaka Ozawa, Taiichi Kusano
  • Publication number: 20030067709
    Abstract: A method and apparatus for resolving a “continuity” problem that occurs when modes are switched in the head positioning control process, and a contradiction exists between a short seek and a long seek.
    Type: Application
    Filed: September 19, 2002
    Publication date: April 10, 2003
    Applicant: International Business Machines Corporation
    Inventors: Yutaka Ozawa, Masahide Yamasaki
  • Publication number: 20030067708
    Abstract: A data storage device that can perform a track following process even when vibrations are produced by a wide range of frequencies.
    Type: Application
    Filed: September 20, 2002
    Publication date: April 10, 2003
    Applicant: International Business Machines Corporation
    Inventor: Yutaka Ozawa
  • Patent number: 6520835
    Abstract: Disclosed is a polishing system used for polishing a surface to be polished of an object to be polished by a polishing pad, which is capable of improving uniformity of the surface to be polished of the object to be polished by positively, accurately adjusting a polishing pressure, and a polishing method using the polishing system. Concretely, the surface to be polished of a wafer as the object to be polished is polished by relatively moving, along a plane, a polishing surface of the rotating polishing pad and the surface to be polished of the wafer in slide-contact with each other, and adjusting a pressing force applied from the polishing pad to the wafer in accordance with a polishing pressure previously set depending on a relative-positional relationship between the polishing surface of the polishing pad and the surface to be polished of the wafer.
    Type: Grant
    Filed: October 30, 2000
    Date of Patent: February 18, 2003
    Assignee: Sony Corporation
    Inventors: Shuzo Sato, Hiizu Ohtorii, Yasuharu Ohkawa, Yutaka Ozawa, Taiichi Kusano
  • Patent number: 6515813
    Abstract: A method to enable servo information to be detected surely and stably even when a time interval between servo sectors is changed due to disk shifting. A time interval TS(i) is calculated according to an internal variable value, which is in proportion to a displacement &Dgr;r(i) of a servo area SF(i) in a radial direction of a subject disk (step S6). The displacement &Dgr;r(i) is calculated from already detected servo information[, thereby]. Thereby, a time interval for detecting servo information is adjusted according to the above described time interval TS(i) (steps S7 and S4). The time interval TS(i) is the time interval between passing of a servo sector in the servo area SF(i) under the head H and passing of a servo sector in the servo area SF(i+1) under the head H.
    Type: Grant
    Filed: January 17, 2001
    Date of Patent: February 4, 2003
    Assignee: International Business Machines Corporation
    Inventors: Nobuyuki Kitazaki, Kenji Ogasawara, Yutaka Ozawa, Isao Yoneda
  • Publication number: 20030020678
    Abstract: An ON/OFF control signal 105 directive of turning ON in a transmissive display mode or turning OFF in a reflective display mode is output by an ON/OFF state controlling means 111 to a light source 115. The ON/OFF control signal 105 is also output to a data signal converting means 104, and the data signal converting means 104 converts a data signal 102 into a data signal 103 in synchronization with the switching of ON and OFF of the light source 115 so as to prevent positive-negative inversion of the display on a liquid crystal panel 114. A data signal potential supplying means 112 supplies a potential of a data signal based on the data signal 103 to a data signal line 113 so as to drive the liquid crystal panel 114.
    Type: Application
    Filed: July 22, 2002
    Publication date: January 30, 2003
    Inventors: Yutaka Ozawa, Akira Inoue, Katsunori Yamazaki, Tsuyoshi Maeda, Chiyoaki Iijima
  • Patent number: 6501454
    Abstract: A liquid crystal display method is provided in which various types of display patterns can be displayed with a predetermined driving voltage margin being maintained and power consumption does not increase. Accordingly, a driving method for a liquid crystal display device is provided using liquid crystal having two metastable states. A scanning signal has a reset period, a delay period, a selection period and a non-selection period in one frame period. The selection period is set to one horizontal scanning period 1H. The scanning signal is set to reset potentials reversed at an interval of a frame period in the reset period, set to selection potentials reversed at an interval of 1H/2 in the selection period, and set to non-selection potentials in the delay period and the non-selection period. The data potential of a data signal has potentials reversed at an interval of 1H/2.
    Type: Grant
    Filed: October 22, 1998
    Date of Patent: December 31, 2002
    Assignee: Seiko Epson Corporation
    Inventors: Yutaka Ozawa, Hiroaki Nomura
  • Patent number: 6470412
    Abstract: A disk drive and a disk drive control method is described which reduces the number of one track seeks a drive performs. The one track seeks can operate the actuator bearing in a non-linear mode or can increase in the friction of the actuator bearing which leads to servo positioning inaccuracies. In the disk drive the logical block address (LBA) assignments are made so that when sequential addresses are allocated to two different tracks, the tracks are physically non-adjacent. Thus, when a sequential LBAs are read across a track boundary, the actuator is moved farther than would be required if the LBAs were assigned the adjacent tracks.
    Type: Grant
    Filed: October 9, 1998
    Date of Patent: October 22, 2002
    Assignee: International Business Machines Corporation
    Inventors: Masashi Kisaka, Yutaka Ozawa, Kazunari Tsuchimoto
  • Patent number: 6462724
    Abstract: An ON/OFF control signal 105 directive of turning ON in a transmissive display mode or turning OFF in a reflective display mode is output by an ON/OFF state controlling means 111 to a light source 115. The ON/OFF control signal 105 is also output to a data signal converting means 104, and the data signal converting means 104 converts a data signal 102 into a data signal 103 in synchronization with the switching of ON and OFF of the light source 115 so as to prevent positive-negative inversion of the display on a liquid crystal panel 114. A data signal potential supplying means 112 supplies a potential of a data signal based on the data signal 103 to a data signal line 113 so as to drive the liquid crystal panel 114.
    Type: Grant
    Filed: July 1, 1999
    Date of Patent: October 8, 2002
    Assignee: Seiko Epson Corporation
    Inventors: Yutaka Ozawa, Akira Inoue, Katsunori Yamazaki, Tsuyoshi Maeda, Chiyoaki Iijima
  • Publication number: 20020141097
    Abstract: A disk drive has a data recording medium such as a disk, a spindle motor for rotating the disk, disk rotation speed controlling logics for supplying a spindle current to the above described spindle motor to rotate the disk at a constant speed, a head unit for accessing the disk, an actuator for moving the head unit, and head position controlling logics for driving the actuator and controlling the position of the head unit.
    Type: Application
    Filed: March 27, 2001
    Publication date: October 3, 2002
    Applicant: International Business Machines Corporation
    Inventors: Masashi Kisaka, Yutaka Ozawa, Kenji Toga
  • Publication number: 20020126111
    Abstract: Due to a characteristic of a switching element, a current leaks into a display element in an undisplayed region through the switching element to thereby cause a speckled pattern to occur in the undisplayed region. In addition to a supply of scanning signals to scanning lines corresponding to display elements in a displayed region, scanning signals are also supplied to scanning lines corresponding to display elements in the undisplayed region to thereby inhibit the speckled pattern from occurring.
    Type: Application
    Filed: February 27, 2002
    Publication date: September 12, 2002
    Applicant: SEIKO EPSON CORPORATION
    Inventor: Yutaka Ozawa
  • Patent number: 6372856
    Abstract: A dip-formed rubber article is produced by dip-forming a vulcanizable rubber latex composition comprising an unsaturated nitrile-conjugated diene copolymer rubber latex, a sulfur-containing vulcanizer, and at least one vulcanization accelerator selected from (i) dithiocarbamic acid compounds of the formula (1): wherein R1 and R2 independently represent and hydrocarbon group having at least 6 carbon atoms, and (ii) zinc dithiocarbamate compounds of the formula (2): wherein R1 and R2 are as defined above.
    Type: Grant
    Filed: January 16, 2001
    Date of Patent: April 16, 2002
    Assignee: Nippon Zeon Co., Ltd.
    Inventors: Yutaka Ozawa, Hisanori Ohta
  • Publication number: 20020036610
    Abstract: The invention reduces power consumption when, for example, a mobile personal computer is in a power-saving mode or when a cellular phone is in a wait mode, in an electro-optical apparatus, such as a liquid crystal display of the subfield drive type used as a display apparatus for various apparatuses. Three different settings “64”, “16” and “2” are enabled as the number of gray scale levels in an electro-optical apparatus, the number of subfields becoming smaller as the number of gray scale levels is reduced. When a large number of gray scale levels is not required (when in the power-saving mode, the wait mode, etc.), a low number of gray scale levels is set, so that the own capacitance of a liquid crystal layer and storage capacitance are charged and discharged less often.
    Type: Application
    Filed: September 4, 2001
    Publication date: March 28, 2002
    Applicant: SEIKO EPSON CORPORATION
    Inventors: Akihiko Ito, Akira Inoue, Yutaka Ozawa, Ryo Ishii
  • Patent number: 6343792
    Abstract: A shaft seal having a high abrasion resistance is disclosed, by which the leakage of the gas from the high-pressure side to the low-pressure side can be reduced. In the shaft seal, flexible leaves are multi-layered to form a ring shape. The shaft seal is mainly arranged around the rotation shaft of a gas turbine or the like. The relevant turbine comprises a casing, a compressor, a rotation shaft, moving blades attached to the rotation shaft, and stationary blades attached to the casing in a manner such that the stationary blades face the moving blades, wherein the shaft seals are provided between a plurality of stationary blades and the rotation shaft wherein the leaves of each shaft seal contact the rotation shaft. Under the rated operating conditions, the top ends of the leaves slightly separate from the surface of the rotation shaft due to the dynamic pressure generated by the rotation of the rotation shaft.
    Type: Grant
    Filed: March 13, 2000
    Date of Patent: February 5, 2002
    Assignee: Mitsubishi Heavy Industries, Ltd.
    Inventors: Tanehiro Shinohara, Kouichi Akagi, Masanori Yuri, Masahiko Toyoda, Yutaka Ozawa, Akihiro Kawaguchi, Setunori Sakakibara, Zenichi Yoshida, Nobuhiro Kunitake, Takahiro Ohta, Hidehiko Nakane, Eisaku Ito, Yutaka Kawata, Koji Takeshita