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).
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Patent number: 11885957Abstract: 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: GrantFiled: February 13, 2019Date of Patent: January 30, 2024Assignee: PIONEER CORPORATIONInventors: Tomotaka Yabe, Kenji Kawai, Seiro Oshima
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Publication number: 20220390738Abstract: 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: ApplicationFiled: November 19, 2020Publication date: December 8, 2022Inventors: Tomotaka YABE, Shingo IWASAKI, Seiro OSHIMA, Shogo KITAZAWA
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Publication number: 20200409138Abstract: 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: ApplicationFiled: February 13, 2019Publication date: December 31, 2020Inventors: Tomotaka YABE, Kenji KAWAI, Seiro OSHIMA
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Patent number: 7848215Abstract: 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: GrantFiled: March 24, 2006Date of Patent: December 7, 2010Assignee: Pioneer CorporationInventors: Seiro Oshima, Masataka Yamaguchi, Toshihiko Takishita, Takao Tagiri
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Patent number: 7768901Abstract: 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: GrantFiled: October 6, 2006Date of Patent: August 3, 2010Assignee: Pioneer CorporationInventors: Seiro Oshima, Toshihiko Takishita, Eiji Muramatsu, Hiroshi Nishiwaki
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Patent number: 7548499Abstract: 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 ofType: GrantFiled: December 13, 2005Date of Patent: June 16, 2009Assignee: Pioneer CorporationInventors: Takao Tagiri, Seiro Oshima
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Publication number: 20080192599Abstract: 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: ApplicationFiled: September 29, 2004Publication date: August 14, 2008Inventors: Eiji Muramatsu, Kazuo Kuroda, Toshio Suzuki, Masahiro Kato, Toshihiko Takishita, Seiro Oshima, Atsushi Kondo
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Patent number: 7260052Abstract: 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: GrantFiled: November 5, 2003Date of Patent: August 21, 2007Assignee: Pioneer CorporationInventors: Masahiro Kato, Tatsuhiro Yone, Atsushi Yamaguchi, Eiji Muramatsu, Shoji Taniguchi, Toshihiko Takishita, Seiro Oshima, Takao Tagiri
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Publication number: 20070184231Abstract: 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 recordingType: ApplicationFiled: February 15, 2005Publication date: August 9, 2007Applicant: PIONEER CORPORATIONInventors: Kazuo Kuroda, Toshio Suzuki, Eiji Muramatsu, Masahiro Kato, Toshihiko Takishita, Seiro Oshima, Atsushi Kondo
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Publication number: 20070081437Abstract: 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: ApplicationFiled: October 6, 2006Publication date: April 12, 2007Inventors: Seiro Oshima, Toshihiko Takishita, Eiji Muramatsu, Hiroshi Nishiwaki
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Publication number: 20060256703Abstract: 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: ApplicationFiled: March 24, 2006Publication date: November 16, 2006Inventors: Seiro Oshima, Masataka Yamaguchi, Toshihiko Takishita, Takao Tagiri
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Publication number: 20060233523Abstract: 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: ApplicationFiled: March 30, 2006Publication date: October 19, 2006Inventors: Eiji Muramatsu, Kazuo Kuroda, Toshio Suzuki, Masahiro Kato, Toshihiko Takishita, Seiro Oshima, Atsushi Kondo
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Patent number: 7092351Abstract: 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: GrantFiled: December 10, 2003Date of Patent: August 15, 2006Assignee: Pioneer CorporationInventors: Atsushi Yamaguchi, Masahiro Kato, Eiji Muramatsu, Seiro Oshima, Takao Tagiri
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Publication number: 20060133244Abstract: 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 ofType: ApplicationFiled: December 13, 2005Publication date: June 22, 2006Applicant: PIONEER CORPORATIONInventors: Takao Tagiri, Seiro Oshima
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Publication number: 20050213480Abstract: 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: ApplicationFiled: March 22, 2005Publication date: September 29, 2005Inventors: Nobuki Yamaoka, Toshihiko Takishita, Seiro Oshima, Atsushi Kondo, Masataka Yamaguchi, Takao Tagiri
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Publication number: 20050073942Abstract: 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: ApplicationFiled: September 27, 2004Publication date: April 7, 2005Inventors: Atsushi Kondo, Toshihiko Takishita, Seiro Oshima, Kazuo Kuroda, Toshio Suzuki, Eiji Muramatsu, Masahiro Kato
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Publication number: 20050073943Abstract: 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: ApplicationFiled: September 27, 2004Publication date: April 7, 2005Inventors: Seiro Oshima, Toshihiko Takishita, Atsushi Kondo, Kazuo Kuroda, Toshio Suzuki, Eiji Muramatsu, Masahiro Kato
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Publication number: 20050074577Abstract: 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: ApplicationFiled: September 28, 2004Publication date: April 7, 2005Inventors: Toshihiko Takishita, Kazuo Kuroda, Toshio Suzuki, Eiji Muramatsu, Masahiro Kato, Seiro Oshima, Atsushi Kondo
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Publication number: 20050068883Abstract: 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: ApplicationFiled: September 24, 2004Publication date: March 31, 2005Inventors: Atsushi Kondo, Toshihiko Takishita, Seiro Oshima, Takao Tagiri
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Patent number: 6837072Abstract: 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: GrantFiled: June 2, 2003Date of Patent: January 4, 2005Assignee: Pioneer CorporationInventors: Yoshio Sasaki, Toshihiko Maruyama, Eiji Muramatsu, Masahiro Kato, Seiro Oshima, Takao Tagiri