Patents by Inventor Koji Takazawa

Koji Takazawa 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).

  • INFORMATION STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD
    Publication number: 20140003212
    Abstract: A machine readable information storage medium, a reproducing method and apparatus which reproduces data from the storage medium, and a recording method and apparatus for recording data on the storage medium. The information storage medium includes a control area which stores within a data structure information usable by the recording or reproducing apparatus to record or reproduce the data on or from the storage medium. The information stored within the data structure includes a version corresponding to a specification, a revision number of recording speed, and an extended part version field.
    Type: Application
    Filed: September 3, 2013
    Publication date: January 2, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hideo ANDO, Seiji Morita, Koji Takazawa
  • INFORMATION STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD
    Publication number: 20140003219
    Abstract: A machine readable information storage medium, a reproducing method and apparatus which reproduces data from the storage medium, and a recording method and apparatus for recording data on the storage medium. The information storage medium includes a control area which stores within a data structure information usable by the recording or reproducing apparatus to record or reproduce the data on or from the storage medium. The information stored within the data structure includes a version corresponding to a specification, a revision number of recording speed, and an extended part version field.
    Type: Application
    Filed: September 3, 2013
    Publication date: January 2, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hideo ANDO, Seiji Morita, Koji Takazawa
  • INFORMATION STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD
    Publication number: 20140003218
    Abstract: A machine readable information storage medium, a reproducing method and apparatus which reproduces data from the storage medium, and a recording method and apparatus for recording data on the storage medium. The information storage medium includes a control area which stores within a data structure information usable by the recording or reproducing apparatus to record or reproduce the data on or from the storage medium. The information stored within the data structure includes a version corresponding to a specification, a revision number of recording speed, and an extended part version field.
    Type: Application
    Filed: September 3, 2013
    Publication date: January 2, 2014
    Applicant: KABUSHIKI KAISHA TOSHIBA
    Inventors: Hideo ANDO, Seiji Morita, Koji Takazawa
  • Optional disk and method for manufacturing the same
    Patent number: 8603602
    Abstract: A first substrate is formed to include a surface on which a first record layer is formed, and which includes an inner circumferential portion on which a ring-shaped member is provided. Ultraviolet curing resin is dropped onto part of the surface which is located inward of the ring-shaped member, and the first substrate is then spun to coat the first record layer with the ultraviolet curing resin. Furthermore, a second substrate is formed to include a surface on which a second record layer is formed, and the second substrate is spun to coat the second record layer with ultraviolet curing resin. Then, the first and second record layers are made to face each other, and the first and second substrates are bonded to each other by the ultraviolet curing resin.
    Type: Grant
    Filed: April 1, 2013
    Date of Patent: December 10, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventor: Koji Takazawa
  • Optical recording medium, information recording method, and information reproducing method
    Patent number: 8593930
    Abstract: According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this end, an optical recording medium comprises a first recording part which includes a first recording layer and a first light reflecting layer and which is disposed on a side closer to a light receiving surface, and a second recording part which includes a second recording layer and a second light reflecting layer and which is disposed on a side farther from the light receiving surface, the first recording part and the second recording part being stacked, wherein the thickness of the first light reflecting layer is smaller than the thickness of the second light reflecting layer.
    Type: Grant
    Filed: December 6, 2010
    Date of Patent: November 26, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Takazawa, Seiji Morita, Kazuyo Umezawa, Naoki Morishita, Yasuaki Ootera, Hideo Ando, Naomasa Nakamura
  • Storage medium, reproducing method, and recording method
    Patent number: 8588047
    Abstract: According to one embodiment, a write-once type information storage medium comprises an organic dye based recording material having sensitivity at a wavelength of 405 nm and at a recording wavelength in the range of 600 nm to 700 nm, wherein, when absorbance of a maximum absorption wavelength in the vicinity of 405 nm is defined as 1, the absorbance is 5% or more at any wavelength in the range of 600 nm to 700 nm.
    Type: Grant
    Filed: August 13, 2010
    Date of Patent: November 19, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideo Ando, Seiji Morita, Koji Takazawa, Yasuaki Ootera, Naoki Morishita, Kazuyo Umezawa
  • INFORMATION STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD
    Publication number: 20130294214
    Abstract: According to one embodiment, an information storage medium includes an organic dye material which records information with a light beam having a wavelength equal to or smaller than 620 nm.
    Type: Application
    Filed: June 28, 2013
    Publication date: November 7, 2013
    Inventors: Hideo Ando, Seiji Morita, Koji Takazawa
  • INFORMATION STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD
    Publication number: 20130294215
    Abstract: According to one embodiment, an information storage medium includes an organic dye material which records information with a light beam having a wavelength equal to or smaller than 620 nm.
    Type: Application
    Filed: June 28, 2013
    Publication date: November 7, 2013
    Inventors: Hideo ANDO, Seiji Morita, Koji Takazawa
  • INFORMATION STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD
    Publication number: 20130294212
    Abstract: According to one embodiment, an information storage medium includes an organic dye material which records information with a light beam having a wavelength equal to or smaller than 620 nm.
    Type: Application
    Filed: June 28, 2013
    Publication date: November 7, 2013
    Inventors: Hideo ANDO, Seiji Morita, Koji Takazawa
  • INFORMATION STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD
    Publication number: 20130294213
    Abstract: According to one embodiment, an information storage medium includes an organic dye material which records information with a light beam having a wavelength equal to or smaller than 620 nm.
    Type: Application
    Filed: June 28, 2013
    Publication date: November 7, 2013
    Inventors: Hideo ANDO, Seiji Morita, Koji Takazawa
  • INFORMATION STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD
    Publication number: 20130286811
    Abstract: According to one embodiment, an information storage medium includes an organic dye material which records information with a light beam having a wavelength equal to or smaller than 620 nm.
    Type: Application
    Filed: June 28, 2013
    Publication date: October 31, 2013
    Inventors: Hideo ANDO, Seiji Morita, Koji Takazawa
  • STORAGE MEDIUM, REPRODUCING METHOD, AND RECORDING METHOD
    Publication number: 20130279317
    Abstract: According to an embodiment, a storage medium includes a transparent resin substrate having a concentric or spiral groove and a recording film formed on the groove on the transparent resin substrate, a recording mark being formed by irradiation of a laser beam, wherein a reproduction durability count in a case where reproduction is continuously carried out by a laser beam is 1,000,000 or more.
    Type: Application
    Filed: June 20, 2013
    Publication date: October 24, 2013
    Inventors: Seiji MORITA, Koji TAKAZAWA, Kazuyou UMEZAWA, Hideo ANDO, Yasuaki OOTERA, Naoki MORISHITA, Naomasa NAKAMURA
  • Information storage medium, reproducing method, and recording method
    Patent number: 8547818
    Abstract: An information storage medium configured to store: a version corresponding to a specification; an extended part version; a first revision number of maximum recording speed; a record revision number of minimum recording speed; first information relating to a first recording power corresponding to the first revision number; and second information relating to a second recording power corresponding to the record revision number, wherein a byte position of the version corresponding to the specification, a byte position of the extended part version, a byte position of the first revision number, and a byte position of the record revision number are smaller than byte positions of the first and second information.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: October 1, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideo Ando, Seiji Morita, Koji Takazawa
  • Information storage medium, reproducing method, and recording method
    Patent number: 8542568
    Abstract: According to one embodiment, an information storage medium includes an organic dye material which records information with a light beam having a wavelength equal to or smaller than 620 nm.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: September 24, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideo Ando, Seiji Morita, Koji Takazawa
  • Information storage medium, reproducing method, and recording method
    Patent number: 8542567
    Abstract: According to one embodiment, an information storage medium includes an organic dye material which records information with a light beam having a wavelength equal to or smaller than 620 nm.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: September 24, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideo Ando, Seiji Morita, Koji Takazawa
  • Storage medium, reproducing method, and recording method
    Patent number: 8531936
    Abstract: According to an embodiment, a storage medium includes a transparent resin substrate having a concentric or spiral groove and a recording film formed on the groove on the transparent resin substrate, a recording mark being formed by irradiation of a laser beam, wherein a reproduction durability count in a case where reproduction is continuously carried out by a laser beam is 1,000,000 or more.
    Type: Grant
    Filed: August 31, 2010
    Date of Patent: September 10, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Seiji Morita, Koji Takazawa, Kazuyo Umezawa, Hideo Ando, Yasuaki Ootera, Naoki Morishita, Naomasa Nakamura
  • Optical recording medium having intermediate layer of prescribed thickness and thickness range for use with 405nm laser
    Patent number: 8509049
    Abstract: According to one embodiment, an optical recording medium is provided in which interlayer crosstalk is low and in which stable and high-quality recording characteristics can be obtained. To this end, in this optical recording medium, an intermediate layer whose thickness variation is managed to be equal to or less than a predetermined value is provided between a first recording part and a second recording part.
    Type: Grant
    Filed: May 31, 2007
    Date of Patent: August 13, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Koji Takazawa, Seiji Morita, Kazuyo Umezawa, Naoki Morishita, Yasuaki Ootera, Hideo Ando, Naomasa Nakamura
  • Information storage medium, reproducing method, and recording method
    Patent number: 8472292
    Abstract: According to one embodiment, an information storage medium includes an organic dye material which records information with a light beam having a wavelength equal to or smaller than 620 nm.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: June 25, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideo Ando, Seiji Morita, Koji Takazawa
  • Information storage medium, reproducing method, and recording method
    Patent number: 8446803
    Abstract: According to one embodiment, an information storage medium includes an organic dye material which records information with a light beam having a wavelength equal to or smaller than 620 nm.
    Type: Grant
    Filed: September 15, 2011
    Date of Patent: May 21, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Hideo Ando, Seiji Morita, Koji Takazawa
  • Optical recording medium for writing data using multiple pulses
    Patent number: 8437242
    Abstract: An optical recording medium including a plurality of recording layers to record/reproduce information using light with a predetermined wavelength, the information being recorded on one of the recording layers using a mark and a space, wherein a channel clock period T is provided for recording the mark on one of the recording layers. A plurality of pulses, including a last pulse arranged at an end of the pulses, are used to record the mark with length 3T, the mark being recorded with a condition that a width of the last pulse is minimum OT and maximum 1.10T, in which a first subsequent level lower than a peak power level of the last pulse is arranged next to the last pulse, and a second subsequent level lower than the peak power level but higher than the first subsequent level is arranged next to the first subsequent level.
    Type: Grant
    Filed: October 4, 2011
    Date of Patent: May 7, 2013
    Assignee: Kabushiki Kaisha Toshiba
    Inventors: Kazuyo Umezawa, Seiji Morita, Koji Takazawa, Naomasa Nakamura, Naoki Morishita, Shinichi Katsuda