Patents by Inventor Hiroaki Shioyama
Hiroaki Shioyama 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: 6643231Abstract: A method and apparatus for reproducing data from an optical disc which has a plurality of recording layers reproducible from one side of the optical disc, and in which the disc is recorded in the OTP (Opposite Track Path) type. Upon receipt of a command of pausing, a pausing operation is performed by switching a moving direction of a focal point of an optical pickup in accordance with layer information of the recording layer to be currently reproduced.Type: GrantFiled: July 19, 2002Date of Patent: November 4, 2003Assignee: Hitachi, Ltd.Inventors: Kazuhiko Ono, Eiji Ikeda, Hiroshi Minoda, Akio Fukushima, Hiroaki Shioyama, Shigeki Inoue
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Patent number: 6552970Abstract: An optical disc apparatus for recording information and/or reproducing on an optical disc which has at least two recording layers including layer 0 and layer 1 reproducible from one side of the disc. The apparatus includes an optical pickup having a laser source, an objective lens, and an actuator. A controller is provided which obtains a present layer information of a sector recording layer from light reflected from the disc, confirms a target layer information of a target recording layer, judges whether the present layer information is the same as the target layer information, and outputs a first control signal to the actuator when it is judged that the present layer information is layer 0 and the target layer information is layer 1, and outputs a second control signal to a slider.Type: GrantFiled: April 15, 2002Date of Patent: April 22, 2003Assignee: Hitachi, Ltd.Inventors: Kazuhiko Ono, Eiji Ikeda, Hiroshi Minoda, Akio Fukushima, Hiroaki Shioyama, Shigeki Inoue
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Publication number: 20020181345Abstract: A method and apparatus for reproducing data from an optical disc which has a plurality of recording layers reproducible from one side of the optical disc, and in which the disc is recorded in the OTP (Opposite Track Path) type. Upon receipt of a command of pausing, a pausing operation is performed by switching a moving direction of a focal point of an optical pickup in accordance with layer information of the recording layer to be currently reproduced.Type: ApplicationFiled: July 19, 2002Publication date: December 5, 2002Inventors: Kazuhiko Ono, Eiji Ikeda, Hiroshi Minoda, Akio Fukushima, Hiroaki Shioyama, Shigeki Inoue
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Patent number: 6452889Abstract: A method for reproducing information on a dual layer disc which has two recording layers including layer 0 and layer 1 reproducible from one side of the [disk] disc, wherein each layer has a plurality of sectors.Type: GrantFiled: October 10, 2001Date of Patent: September 17, 2002Assignee: Hitachi, Ltd.Inventors: Kazuhiko Ono, Eiji Ikeda, Hiroshi Minoda, Akio Fukushima, Hiroaki Shioyama, Shigeki Inoue
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Publication number: 20020110054Abstract: An optical disc apparatus for recording information and/or reproducing on an optical disc which has at least two recording layers including layer 0 and layer 1 reproducible from one side of the disc. The apparatus includes an optical pickup having a laser source, an objective lens, and an actuator. A controller is provided which obtains a present layer information of a sector recording layer from light reflected from the disc, confirms a target layer information of a target recording layer, judges whether the present layer information is the same as the target layer information, and outputs a first control signal to the actuator when it is judged that the present layer information is layer 0 and the target layer information is layer 1, and outputs a second control signal to a slider.Type: ApplicationFiled: April 15, 2002Publication date: August 15, 2002Inventors: Kazuhiko Ono, Eiji Ikeda, Hiroshi Minoda, Akio Fukushima, Hiroaki Shioyama, Shigeki Inoue
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Publication number: 20020009025Abstract: A method for reproducing information on a dual layer disc which has two recording layers including layer 0 and layer 1 reproducible from one side of the disk, wherein each layer has a plurality of sectors. The method includes the steps of emanating an optical beam from a laser source, concentrating the optical beam on a recording layer with an objective lens, moving the objective lens in the direction of the thickness of the disk so that a focal point of the objective lens is focused on one layer of the two recording layers, obtaining a present layer information of a sector of the recording layer being reproduced from the reflected light from the disk, confirming a target layer information of a target recording layer of a target information, and moving the objective lens in a direction of the thickness of the disk until the focal point of the objective lens is focused on layer 1 when the present layer information is layer 0 and the target layer information is layer 1.Type: ApplicationFiled: October 10, 2001Publication date: January 24, 2002Inventors: Kazuhiko Ono, Eiji Ikeda, Hiroshi Minoda, Akio Fukushima, Hiroaki Shioyama, Shigeki Inoue
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Patent number: 6317403Abstract: There are provided a plurality of information recording surfaces to be reproduced on one side of an optical disc to be reproduced, and when accessing control of an optical pickup over a plurality of recording layers is performed, first, a beam focal point of the optical pickup is moved using a moving device to the recording layer on which target information is recorded to thereby perform switching processing of information recording layers during reproduction, after which accessing control of the optical pickup is performed using control processor similar to the access between the same recording layers, and with respect to the pausing operation, in a layer in which information is recorded from the inner circumference to the outer circumference, one track jumping is repeated toward the inner circumference, while in a layer in which information is recorded from the outer circumference to the inner circumference, one track jumping is repeated toward the outer circumference.Type: GrantFiled: September 13, 1999Date of Patent: November 13, 2001Assignee: Hitachi, Ltd.Inventors: Kazuhiko Ono, Eiji Ikeda, Hiroshi Minoda, Akio Fukushima, Hiroaki Shioyama, Shigeki Inoue
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Patent number: 6108291Abstract: There are provided a plurality of information recording surfaces to be reproduced on one side of an optical disc to be reproduced, and when accessing control of an optical pickup over a plurality of recording layers is performed, first, a beam focal point of the optical pickup is moved using a moving device to the recording layer on which target information is recorded to thereby perform switching processing of information recording layers during reproduction, after which accessing control of the optical pickup is performed using control processing circuit similar to the access between the same recording layers, and with respect to the pausing operation, in a layer in which information is recorded from the inner circumference to the outer circumference, one track jumping is repeated toward the inner circumference, while in a layer in which information is recorded from the outer circumference to the inner circumference, one track jumping is repeated toward the outer circumference.Type: GrantFiled: September 13, 1999Date of Patent: August 22, 2000Assignee: Hitachi, Ltd.Inventors: Kazuhiko Ono, Eiji Ikeda, Hiroshi Minoda, Akio Fukushima, Hiroaki Shioyama, Shigeki Inoue
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Patent number: 6002655Abstract: There are provided a plurality of information recording surfaces to be reproduced on one side of an optical disc to be reproduced, and when accessing control of an optical pickup over a plurality of recording layers is performed, first, a beam focal point of the optical pickup is moved using a moving means to the recording layer on which target information is recorded to thereby perform switching processing of information recording layers during reproduction, after which accessing control of the optical pickup is performed using control processing means similar to the access between the same recording layers, and with respect to the pausing operation, in a layer in which information is recorded from the inner circumference to the outer circumference, one track jumping is repeated toward the inner circumference, while in a layer in which information is recorded from the outer circumference to the inner circumference, one track jumping is repeated toward the outer circumference.Type: GrantFiled: July 7, 1997Date of Patent: December 14, 1999Assignee: Hitachi, Ltd.Inventors: Kazuhiko Ono, Eiji Ikeda, Hiroshi Minoda, Akio Fukushima, Hiroaki Shioyama, Shigeki Inoue