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    12.
    发明专利
    未知

    公开(公告)号：AT521968T

    公开(公告)日：2011-09-15

    申请号：AT03811546

    申请日：2003-11-20

    Applicant: SONY CORP

    Inventor： KAI SHINICHI ,  KOUCHIYAMA AKIRA ,  ARATANI KATSUHISA ,  NAKAGAWA KENZO ,  TAKEMOTO YOSHIHIRO

    IPC: G11B7/26 ,  G03F7/20 ,  G11B7/00 ,  G11B7/125 ,  G11B7/1267

    Abstract: The method of the present invention includes an exposing step in which a laser beam for recording modulated by an information signal corresponding to an information signal of an information concave and convex pattern formed on the optical disc is applied to an inorganic resist layer 101 formed on a substrate 100 to form an exposed pattern corresponding to the information concave and convex pattern on the optical disc, and a development step in which a concave and convex pattern corresponding to the information concave and convex pattern by the inorganic resist layer is formed. By applying a laser beam for estimation to a predetermined area on the inorganic resist layer in the exposing step to estimate recorded signal characteristics of the exposed pattern by the inorganic resist layer using reflected light of the laser beam for estimation, and controlling power of the laser beam for recording based on the estimated result, the aimed information recording on the optical disc can reliably be obtained.

    OPTICAL DISC INCLINATION DETECTING METHOD, OPTICAL PICKUP DEVICE, AND OPTICAL DISC DEVICE
    13.
    发明专利
    OPTICAL DISC INCLINATION DETECTING METHOD, OPTICAL PICKUP DEVICE, AND OPTICAL DISC DEVICE 未知

    公开(公告)号：MY125617A

    公开(公告)日：2006-08-30

    申请号：MYPI9904812

    申请日：1999-11-05

    Applicant: SONY CORP

    Inventor： FUKUMOTO ATSUSHI ,  KAI SHINICHI

    IPC: G11B7/09 ,  G11B7/095

    Abstract: AN OPTICAL DISC INCLINATION DETECTING METHOD FOR DETECTING AN INCLINATION ANGLE OF AN OPTICAL DISC (7) WITH RESPECT TO A LIGHT SPOT, FOR RECORDING INFORMATION OR REPRODUCING INFORMATION BY IRRADIATING THE LIGHT SPOT ON THE OPTICAL DISC (7) BY AN OPTICAL PICKUP. THE METHOD INCLUDES DIVIDING THE LIGHT SPOT INTO A MAIN SPOT (27) AND BOTH SIDE SPOTS (22, 30) IN A SPECIFIED TRACK AND TRACK CROSSING DIRECTIONS BEFORE AND AFTER THE SPECIFIED TRACK, DETECTING SIGNALS CORRESPONDING TO A REFLECTED LIGHT FROM THE OPTICAL DISC (7) BY PHOTO DETECTOR (13)S CORRESPONDING TO THE MAIN SPOT (27) AND BOTH SIDE SPOTS (22, 30), AND GENERATING A DPP (DIFFERENTIAL PUSH-PULL) SIGNAL FROM SIGNALS CORRESPONDING TO THE MAIN SPOT (27) AND BOTH SIDE SPOTS (22, 30). THE METHOD ALSO GENERATES A DPD (DIFFERENTIAL PHASE DIRECTION) SIGNAL BY COMPARING PHASES FROM THE SIGNALS CORRESPONDING TO THE MAIN SPOT (27).DETERMINING A DIFFERENTIAL OPERATION VALUE OF THE DPP ARID DPD SIGNALS, AND DETECTING THE INCLINATION ANGLE OF THE OPTICAL DISC (7) BASED ON THE DIFFERENTIAL OPERATION VALUE. THE MOST ILLUSTRATIVE DRAWING IS(

    14.
    发明专利
    未知

    公开(公告)号：DE69724201T2

    公开(公告)日：2004-06-17

    申请号：DE69724201

    申请日：1997-02-07

    Applicant: SONY CORP

    Inventor： NAKAGAWA TOSHIYUKI ,  INO HIROYUKI ,  YOSHIMURA SHUNJI ,  KAI SHINICHI

    IPC: G11B20/10 ,  G11B20/14 ,  G11B20/18 ,  H03M5/14 ,  H04L25/49

    Abstract: In a data decoding apparatus of this invention, level of a reproduction RF signal 7a at the time of the binary level judgment of channel bit is temporarily stored into a RF signal level memory section 20. The portions which do not satisfy the conditions of the minimum run length and the maximum run length of the same symbols within the channel bit data train are respectively detected by a (d'-1) detecting section 16 and a (k'+1) detecting section 17. This data decoding apparatus comprises correction bit position detecting sections 18, 19 for outputting correction bit position designation signals on the basis of level of the RF signal at the time of the binary level judgment stored in the RF signal level memory section 20, and a bit data inversion correcting section 15 for inverting logic level of data at bit position designated on the basis of the correction bit position designation signals 18a, 18b, 19a, 19b. In the case where there exists any portion which does not satisfy the conditions of the minimum run length and/or the maximum run length of the same symbols within channel bit data obtained by binarizing a signal which has been read out from the recording medium, correction is implemented to the channel bit data, thereby making it possible to improve the bit error rate, and to ensure skew margin.

    Data reproducing apparatus and method
    15.
    发明专利
    Data reproducing apparatus and method 未知

    公开(公告)号：AU2769700A

    公开(公告)日：2000-10-26

    申请号：AU2769700

    申请日：2000-04-12

    Applicant: SONY CORP

    Inventor： YOSHIMURA SHUNJI ,  FUKUMOTO ATSUSHI ,  KAI SHINICHI

    IPC: G11B11/10 ,  G11B11/105 ,  G11B20/10

    Abstract: The recording medium consists of a displacement layer (11), a switching layer (12) and a memory layer (13) formed in this order. The memory layer is composed of a perpendicular magnetizing film; the displacement layer is composed of another perpendicular magnetizing film whose magnetic wall reluctance is relatively smaller than that of the memory layer. The switching layer is composed of a magnetic layer whose Curie temperature is lower than those of the displacement layer and the memory layer. The reproduction apparatus includes a magnetic wall displacement detector for detecting generation of the magnetic wall displacement by the use of a differential signal of the reproduced signal obtained from a signal reproducer or by the use of a difference signal in the time base direction. A data detector (159) for detects data by the use of the detection signal obtained from the magnetic wall displacement detector. An independent claim is included for a data reproducing method.

    DATA REPRODUCING APPARATUS AND METHOD
    16.
    发明专利
    DATA REPRODUCING APPARATUS AND METHOD 未知

    公开(公告)号：CA2306048A1

    公开(公告)日：2000-10-20

    申请号：CA2306048

    申请日：2000-04-18

    Applicant: SONY CORP

    Inventor： FUKUMOTO ATSUSHI ,  KAI SHINICHI ,  YOSHIMURA SHUNJI

    IPC: G11B11/10 ,  G11B11/105 ,  G11B20/10 ,  G11B13/04

    Abstract: A DWDD type data reproducing apparatus which handles a magneto-optical recording medium having a magnetic three-layer film consisting at least of a displacement layer, a switching layer and a memory layer. A magnetic wall displacement in the displacement layer is generated in any region where the temperature of the magnetic film becomes higher than the Curie temperature of the switching layer, so that the effectively recorded magnetic domain is dimensionally enlarged. A reproduced signal is first equalized with regard to its waveform in an equalizer circuit and then is supplied to a magnetic wall displacement detection circuit. In this detection circuit, a detection signal representing generation of a magnetic wall displacement is produced by using a differential signal or a secondary differential signal of the reproduced signal without being harmfully affected by any sudden DC level variation caused in the reproduced signal. Subsequently a data detection circuit detects the data by the use of such detection signal and then outputs the reproduced data. In this apparatus, the data can be reproduced at a sufficiently low bit error rate despite occurrence of any sudden DC level variation caused in the reproduced signal.

    METHOD FOR PRODUCING STAMPER USED FOR PRODUCING OPTICAL DISC AND OPTICAL DISC PRODUCING METHOD
    18.
    发明公开
    METHOD FOR PRODUCING STAMPER USED FOR PRODUCING OPTICAL DISC AND OPTICAL DISC PRODUCING METHOD 有权
    用于生产夯实夯用于制造光盘信息的光盘和方法

    公开(公告)号：EP1564734A4

    公开(公告)日：2007-10-31

    申请号：EP03811546

    申请日：2003-11-20

    Applicant: SONY CORP

    Inventor： KAI SHINICHI ,  KOUCHIYAMA AKIRA ,  ARATANI KATSUHISA ,  NAKAGAWA KENZO ,  TAKEMOTO YOSHIHIRO

    IPC: G11B7/26 ,  G03F7/20 ,  G11B7/00 ,  G11B7/125

    CPC classification number: G11B7/261 ,  G11B7/1267

    Abstract: The method of the present invention includes an exposing step in which a laser beam for recording modulated by an information signal corresponding to an information signal of an information concave and convex pattern formed on the optical disc is applied to an inorganic resist layer 101 formed on a substrate 100 to form an exposed pattern corresponding to the information concave and convex pattern on the optical disc, and a development step in which a concave and convex pattern corresponding to the information concave and convex pattern by the inorganic resist layer is formed. By applying a laser beam for estimation to a predetermined area on the inorganic resist layer in the exposing step to estimate recorded signal characteristics of the exposed pattern by the inorganic resist layer using reflected light of the laser beam for estimation, and controlling power of the laser beam for recording based on the estimated result, the aimed information recording on the optical disc can reliably be obtained.

    MANUFACTURING PROCESS OF ORIGINAL DISC FOR PRODUCING OPTICAL DISC AND PRODUCTION PROCESS OF OPTICAL DISC
    19.
    发明公开
    MANUFACTURING PROCESS OF ORIGINAL DISC FOR PRODUCING OPTICAL DISC AND PRODUCTION PROCESS OF OPTICAL DISC 有权
    制造工艺ORIGINAL媒体光盘的光盘光学的生产制作过程

    公开(公告)号：EP1583091A4

    公开(公告)日：2008-11-12

    申请号：EP03789628

    申请日：2003-12-24

    Applicant: SONY CORP

    Inventor： KAI SHINICHI ,  ARATANI KATSUHISA ,  KOUCHIYAMA AKIRA ,  NAKAGAWA KENZO ,  TAKEMOTO YOSHIHIRO

    IPC: B29D11/00 ,  G11B7/26 ,  G03C5/00 ,  G11B20/18

    CPC classification number: G11B7/261 ,  Y10S425/81

    Abstract: A process for manufacturing an original disc comprising a step for irradiating an inorganic resist layer formed on a substrate with a recording laser beam modulated by an information signal corresponding to the information signal of an information irregular pattern to be formed on an optical disc thus forming an exposure pattern corresponding to the information irregular pattern of the optical disc, and a step for developing the inorganic resist layer to form an irregular pattern corresponding to the information irregular pattern by the inorganic resist layer. In order to manufacture an original disc having an appropriate irregular pattern, the exposed part is irradiated with an evaluation laser beam in the exposure step following trial exposure of the non-recorded region of the resist layer. Recording signal characteristics of the resist layer is then evaluated from the reflected light and an optimal focus position of laser beam for subsequent recording is determined based on the evaluation results.

    DATA DECODER
    20.
    发明公开
    DATA DECODER 失效
    数据解码器

    公开(公告)号：EP0821360A4

    公开(公告)日：1999-04-21

    申请号：EP97902634

    申请日：1997-02-07

    Applicant: SONY CORP

    Inventor： NAKAGAWA TOSHIYUKI ,  INO HIROYUKI ,  YOSHIMURA SHUNJI ,  KAI SHINICHI

    IPC: G11B20/10 ,  G11B20/14 ,  G11B20/18 ,  H03M5/14 ,  H04L25/49

    CPC classification number: H04L25/4906 ,  G11B20/10009 ,  G11B20/1426 ,  G11B20/18 ,  H03M5/145

    Abstract: The level of a reproduced RF signal (7a) is temporarily stored in an RF signal level storage (20) when the binary level of a channel bit is judged. The part of a channel bit data train which does not satisfy the conditions of a minimum continuous length and a maximum continuous length of the same symbol is detected by a (d'-1) detector (16) and a (k'+1) detector (17). The decoder is provided with position detectors (18, 19) adapted to output corrected bit positions designating signals on the basis of the level of the RF signal stored in the RF signal level storage (20) when a binary level is judged, and a bit data reversing and correcting element (15) adapted to reverse the logical level of a position of a bit designated on the basis of corrected bit position designating signals (18a, 18b, 19a, 19b). When channel bit data obtained by binarizing a signal read out from a recording medium include a part which does not satisfy the conditions of a minimum continuous length and a maximum continuous length of the same symbol, a bit error rate can be improved by making corrections on the channel bit data, and this also enables a skew marging to be secured.

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