Patents by Inventor Seiro Oshima

Seiro Oshima 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).

  • Publication number: 20220390738
    Abstract: A mirror scanner comprising: a mirror having a first surface that reflects a light, the mirror being swingable about a swing axis; a permanent magnet disposed on a second surface which is a surface opposite of the first surface of the mirror; and a yoke having a pair of magnetic field generating ends and a pair of extending portions, the pair of magnetic field generating ends being disposed at positions facing the permanent magnet in the second surface side of the mirror, the pair of extending portions extending along the second surface of the mirror.
    Type: Application
    Filed: November 19, 2020
    Publication date: December 8, 2022
    Inventors: Tomotaka YABE, Shingo IWASAKI, Seiro OSHIMA, Shogo KITAZAWA
  • Publication number: 20200409138
    Abstract: An optical deflector capable of making a swing angle of a reflective plate larger is provided. In drive elements, since a size in the Y direction at first positions separated by a first distance from the reflective plate is larger than a size in the Y direction at second positions separated by a second distance from the reflective plate, the second distance being greater than the first distance, it is possible to increase displacement of tips of beam portions at the first positions and to make a swing angle of the reflective plate large by increasing a generated force of the entire beam portions.
    Type: Application
    Filed: February 13, 2019
    Publication date: December 31, 2020
    Inventors: Tomotaka YABE, Kenji KAWAI, Seiro OSHIMA
  • Patent number: 7848215
    Abstract: An optical-recording medium is provided with at least a first recording layer for recording information optically; and a second recording layer for recording information optically by a light beam that passes through said first recording layer; wherein the track pitch of a recording track that is formed on said second recording layer is narrower than the track pitch of a recording track that is formed on said first recording layer.
    Type: Grant
    Filed: March 24, 2006
    Date of Patent: December 7, 2010
    Assignee: Pioneer Corporation
    Inventors: Seiro Oshima, Masataka Yamaguchi, Toshihiko Takishita, Takao Tagiri
  • Patent number: 7768901
    Abstract: A recording layer close to a disc surface is divided into at least two recording areas, a main information recording area D1A and an auxiliary information area (BCA) D1C. Grooves are formed in the main information recording area D1A. Marks M are formed in barcode form representing identifying information in the auxiliary information recording area (BCA) D1C. Track grooves G1 or prepits are formed in the recording layer of the auxiliary information recording area (BCA) D1C and have a depth smaller than that of the groove formed in the main information recording area D1A.
    Type: Grant
    Filed: October 6, 2006
    Date of Patent: August 3, 2010
    Assignee: Pioneer Corporation
    Inventors: Seiro Oshima, Toshihiko Takishita, Eiji Muramatsu, Hiroshi Nishiwaki
  • Patent number: 7548499
    Abstract: An offset amount measuring method is provided with: a recording process for measurement (i) of recording information for measurement, into a recording track in the L0 layer, by a predetermined section, from a measurement reference position, and of (ii) recording the information for measurement, into a recording track in the L1 layer, by the predetermined section, from or toward a measurement correspondence position, which is associated with the measurement reference position by the pre-format address; a first detecting process of detecting a border of a first recorded area in which the information for measurement is recorded and a first unrecorded area in the first recording track, on the basis of a difference in reflectance between the first recorded area and the first unrecorded area; a second detecting process of detecting a second border position in the recording track in the L1 layer, on the basis of a difference in reflectance; and a determining process of determining the offset amount, on the basis of
    Type: Grant
    Filed: December 13, 2005
    Date of Patent: June 16, 2009
    Assignee: Pioneer Corporation
    Inventors: Takao Tagiri, Seiro Oshima
  • Publication number: 20080192599
    Abstract: There is provided an information recording medium having a plurality of recording layers (layer L0, layer L1) for recording information. At least one of the recording layers (layer L0, layer L1) has a management information area where recording speed management information defining the maximum possible recording speed when recording information is recorded.
    Type: Application
    Filed: September 29, 2004
    Publication date: August 14, 2008
    Inventors: Eiji Muramatsu, Kazuo Kuroda, Toshio Suzuki, Masahiro Kato, Toshihiko Takishita, Seiro Oshima, Atsushi Kondo
  • Patent number: 7260052
    Abstract: A groove track and a land track are alternately and spirally formed on an information recording medium. On the land track neighboring the groove track, pre-information indicating position information of a track on a disc is formed as a prepit. On the information recording medium, an embossed area is formed so that information about a copyright and for preventing an illegal copy cannot be rewritten. In the embossed area, an embossed configuration including a pit and a space of predetermined depths is formed. The prepit in the embossed area is formed so that the prepit has an optimized configuration according to a pit length and a space length in the embossed area which the prepit neighbors. Consequently, interference between the embossed configuration and the prepit can be prevented even in a case that the prepit is formed in addition to the embossed configuration in the embossed area.
    Type: Grant
    Filed: November 5, 2003
    Date of Patent: August 21, 2007
    Assignee: Pioneer Corporation
    Inventors: Masahiro Kato, Tatsuhiro Yone, Atsushi Yamaguchi, Eiji Muramatsu, Shoji Taniguchi, Toshihiko Takishita, Seiro Oshima, Takao Tagiri
  • Publication number: 20070184231
    Abstract: An information recording medium (100) includes: a first recording layer (107); a semitransparent reflective film (108) to reflect at least one portion of laser light for recording with which the first recording layer is irradiated; a second recording layer (207) which is irradiated with the laser light for recording through the first recording layer and the semitransparent reflective film; and a reflective film (208) to reflect the laser light for recording with which the second recording layer is irradiated, thermal conductivity from the second recording layer to the reflective film when the second recording layer is irradiated with the laser light for recording being substantially equal to thermal conductivity from the first recording layer to the semitransparent reflective film when the first recording layer is irradiated with the laser light for recording
    Type: Application
    Filed: February 15, 2005
    Publication date: August 9, 2007
    Applicant: PIONEER CORPORATION
    Inventors: Kazuo Kuroda, Toshio Suzuki, Eiji Muramatsu, Masahiro Kato, Toshihiko Takishita, Seiro Oshima, Atsushi Kondo
  • Publication number: 20070081437
    Abstract: A recording layer close to a disc surface is divided into at least two recording areas, a main information recording area D1A and an auxiliary information area (BCA) D1C. Grooves are formed in the main information recording area D1A. Marks M are formed in barcode form representing identifying information in the auxiliary information recording area (BCA) D1C. Track grooves G1 or prepits are formed in the recording layer of the auxiliary information recording area (BCA) D1C and have a depth smaller than that of the groove formed in the main information recording area D1A.
    Type: Application
    Filed: October 6, 2006
    Publication date: April 12, 2007
    Inventors: Seiro Oshima, Toshihiko Takishita, Eiji Muramatsu, Hiroshi Nishiwaki
  • Publication number: 20060256703
    Abstract: An optical-recording medium is provided with at least a first recording layer for recording information optically; and a second recording layer for recording information optically by a light beam that passes through said first recording layer; wherein the track pitch of a recording track that is formed on said second recording layer is narrower than the track pitch of a recording track that is formed on said first recording layer.
    Type: Application
    Filed: March 24, 2006
    Publication date: November 16, 2006
    Inventors: Seiro Oshima, Masataka Yamaguchi, Toshihiko Takishita, Takao Tagiri
  • Publication number: 20060233523
    Abstract: There is provided an information recording medium having a plurality of recording layers (layer L0, layer L1) for recording information. At least one of the recording layers (layer L0, layer L1) has a management information area where recording speed management information defining the maximum possible recording speed when recording information is recorded.
    Type: Application
    Filed: March 30, 2006
    Publication date: October 19, 2006
    Inventors: Eiji Muramatsu, Kazuo Kuroda, Toshio Suzuki, Masahiro Kato, Toshihiko Takishita, Seiro Oshima, Atsushi Kondo
  • Patent number: 7092351
    Abstract: The present invention provides an optical recording medium, in which levels of wobble signals extracted from a recording area formed snakily, a reproduction exclusive area and an impossible area are maintained constant. On DVD-RW, groove tracks are snakily formed on a groove section on which recording information is recorded, and pit strings where a plurality of phase pits wave are arranged on the impossible area and the reproduction exclusive area which prevent illegal copying. On the respective areas, pit depths (groove depths), duty of the pit strings and wobbling amplitudes are set according to predetermined conditions so that the output levels of the wobble signals extracted based on the wobbling amplitudes can be maintained constant on the respective areas. As a result, synchronous control can be made accurately at the time of recording and reproduction on/from the DVD-RW.
    Type: Grant
    Filed: December 10, 2003
    Date of Patent: August 15, 2006
    Assignee: Pioneer Corporation
    Inventors: Atsushi Yamaguchi, Masahiro Kato, Eiji Muramatsu, Seiro Oshima, Takao Tagiri
  • Publication number: 20060133244
    Abstract: An offset amount measuring method is provided with: a recording process for measurement (i) of recording information for measurement, into a recording track in the L0 layer, by a predetermined section, from a measurement reference position, and of (ii) recording the information for measurement, into a recording track in the L1 layer, by the predetermined section, from or toward a measurement correspondence position, which is associated with the measurement reference position by the pre-format address; a first detecting process of detecting a border of a first recorded area in which the information for measurement is recorded and a first unrecorded area in the first recording track, on the basis of a difference in reflectance between the first recorded area and the first unrecorded area; a second detecting process of detecting a second border position in the recording track in the L1 layer, on the basis of a difference in reflectance; and a determining process of determining the offset amount, on the basis of
    Type: Application
    Filed: December 13, 2005
    Publication date: June 22, 2006
    Applicant: PIONEER CORPORATION
    Inventors: Takao Tagiri, Seiro Oshima
  • Publication number: 20050213480
    Abstract: An optical disk with multi-layered structure provided with at least two recording layers is provided. In respective recording layers, tracks are formed, and the track is formed such that the amount of eccentricity is different in respective recording layers. In the method for identifying the recording layer which identifies the recording layer of the optical disk, the recording layer is identified by detecting the amount of the eccentricity set to the track of the respective recording layers.
    Type: Application
    Filed: March 22, 2005
    Publication date: September 29, 2005
    Inventors: Nobuki Yamaoka, Toshihiko Takishita, Seiro Oshima, Atsushi Kondo, Masataka Yamaguchi, Takao Tagiri
  • Publication number: 20050073943
    Abstract: An optical recording medium is provided which can solve a problem of insufficient signal amplitude of one recording layer as compared with the other recording layer in a writable optical recording medium of a conventional double layer structure. An optical recording medium, in which a first substrate having a first groove formed thereon, a first recording layer formed on a first-groove forming surface of the first substrate, a semi-translucent first reflecting layer, an intermediate layer, a second recording layer, a second reflecting layer, and a second substrate having a second groove formed thereon are at least disposed in this order, wherein the optical recording medium further includes a heat conducting layer between the second recording layer and the intermediate layer and a heat insulating layer between the second recording layer and the second reflecting layer.
    Type: Application
    Filed: September 27, 2004
    Publication date: April 7, 2005
    Inventors: Seiro Oshima, Toshihiko Takishita, Atsushi Kondo, Kazuo Kuroda, Toshio Suzuki, Eiji Muramatsu, Masahiro Kato
  • Publication number: 20050074577
    Abstract: An optical recording medium of dual layer type is provided which has at least a first substrate, a first recording layer capable of optical recording, a translucent reflecting layer, an intermediate layer, a second recording layer capable of optical recording, and a second substrate in this order from a side where a laser beam for recording, reproduction, or recording/reproduction is applied, wherein the first recording layer is made of an organic dye and the second recording layer is made of a metal material having a higher reflectivity than the organic dye. The optical recording medium provides sufficient signal amplitudes from both recording layers during reproduction, and gives compatibility with a typical optical recording medium during reading.
    Type: Application
    Filed: September 28, 2004
    Publication date: April 7, 2005
    Inventors: Toshihiko Takishita, Kazuo Kuroda, Toshio Suzuki, Eiji Muramatsu, Masahiro Kato, Seiro Oshima, Atsushi Kondo
  • Publication number: 20050073942
    Abstract: An optical recording medium, in which a first substrate, a first recording layer, a first reflecting layer, an intermediate layer, a second recording layer, a second reflecting layer, and a second substrate are at least laminated, the optical recording medium further including a transcription layer between the second recording layer and the second reflecting layer. The optical recording medium of the invention can solve a problem of insufficient signal amplitude of one recording layer as compared with the other recording layer in a writable optical recording medium of a conventional double layer structure.
    Type: Application
    Filed: September 27, 2004
    Publication date: April 7, 2005
    Inventors: Atsushi Kondo, Toshihiko Takishita, Seiro Oshima, Kazuo Kuroda, Toshio Suzuki, Eiji Muramatsu, Masahiro Kato
  • Publication number: 20050068883
    Abstract: An optical recording medium having a structure comprising at least a first substrate, a first recording layer capable of optical recording, a first reflection layer, an intermediate layer, a second recording layer capable of optical recording, a second reflection layer and a second substrate in this order from a side on which recording, reproducing or recording and reproducing laser light is applied, wherein the intermediate layer is composed of a resin having a glass transition temperature of 90° C. or greater.
    Type: Application
    Filed: September 24, 2004
    Publication date: March 31, 2005
    Inventors: Atsushi Kondo, Toshihiko Takishita, Seiro Oshima, Takao Tagiri
  • Patent number: 6837072
    Abstract: A rewritable optical recording medium includes a segmented groove area in which the groove track is segmented along a rotating direction of the recording medium by groove non-forming portions to form a plurality of groove portions; and a continuous groove area in which a continuous groove is formed, the continuous groove having a groove width smaller than a groove width in the segmented groove area.
    Type: Grant
    Filed: June 2, 2003
    Date of Patent: January 4, 2005
    Assignee: Pioneer Corporation
    Inventors: Yoshio Sasaki, Toshihiko Maruyama, Eiji Muramatsu, Masahiro Kato, Seiro Oshima, Takao Tagiri
  • Patent number: 6813237
    Abstract: The present invention provides an optical recording medium, in which levels of wobble signals extracted from a recording area formed snakily, a reproduction exclusive area and an impossible area are maintained constant. On DVD-RW, groove tracks are snakily formed on a groove section on which recording information is recorded, and pit strings where a plurality of phase pits wave are arranged on the impossible area and the reproduction exclusive area which prevent illegal copying. On the respective areas, pit depths (groove depths), duty of the pit strings and wobbling amplitudes are set according to predetermined conditions so that the output levels of the wobble signals extracted based on the wobbling amplitudes can be maintained constant on the respective areas. As a result, synchronous control can be made accurately at the time of recording and reproduction on/from the DVD-RW.
    Type: Grant
    Filed: July 25, 2001
    Date of Patent: November 2, 2004
    Assignee: Pioneer Corporation
    Inventors: Atsushi Yamaguchi, Masahiro Kato, Eiji Muramatsu, Seiro Oshima, Takao Tagiri