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公开(公告)号：JPH1031862A
公开(公告)日：1998-02-03
申请号：JP20550796
申请日：1996-07-17
Applicant: SONY CORP
Inventor： ISHIKAWA HIDEKI
IPC: G11B19/28 , G11B19/247
Abstract: PROBLEM TO BE SOLVED: To control a reproducing linear velocity according to a discriminated area, to speed up access operation and to reduce power consumption by making the speed difference of a disk rotational speed lower than a rotational speed difference between inner/outer peripheries. SOLUTION: Plural areas are set in the radial direction of a disk 90, and the operation switching the linear velocity at every area and reproducing is executed. Thus, the table data for switching the linear velocity are stored in a memory 17, and the area is set by an address value, and the linear velocities in respective areas are set. At this time, the no. of the address of a disk innermost side, the address of an outermost side are made nLAST, and n1-n4 show the certain specified addresses on the disk.
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公开(公告)号：JP2010015616A
公开(公告)日：2010-01-21
申请号：JP2008172460
申请日：2008-07-01
Inventor： ISHIKAWA HIDEKI
CPC classification number: G11B7/08511 , G11B2007/0013
Abstract: PROBLEM TO BE SOLVED: To precisely perform a focus jump even when affected by disturbance, etc. SOLUTION: When the focus jump is started, an offset signal is generated. When a focus error signal (FE signal) is determined to be smaller than a threshold v1, the polarity of a focus control signal is reversed. Thereafter, when the FE signal is determined to be larger than a threshold v2, the polarity of the focus control signal is reversed. Thereafter, when the FE signal is determined to be smaller than a threshold v3, generation of the offset signal is stopped. Even when the focus jump is being performed, the servo is active. This method is applied to a recording and reproducing device handling a multilayer disk. COPYRIGHT: (C)2010,JPO&INPIT
Abstract translation: 要解决的问题：即使受到干扰等影响也能精确地执行聚焦跳转。解决方案：当聚焦跳转开始时，产生偏移信号。 当聚焦误差信号（FE信号）被确定为小于阈值v1时，聚焦控制信号的极性反转。 此后，当确定FE信号大于阈值v2时，聚焦控制信号的极性反转。 此后，当FE信号被确定为小于阈值v3时，偏移信号的产生被停止。 即使正在执行焦点跳转，伺服也是有效的。 该方法适用于处理多层盘的记录和再现装置。 版权所有（C）2010，JPO＆INPIT
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公开(公告)号：JPH0744978A
公开(公告)日：1995-02-14
申请号：JP20857393
申请日：1993-07-30
Applicant: SONY CORP
Inventor： ISHIKAWA HIDEKI , SAITO HITOSHI
Abstract: PURPOSE:To provide a floppy disk device capable of sufficiently and surely limiting the harmful vibrations of a head chip and a head arm and preventing a head squeaking. CONSTITUTION:At the floppy disk device having a gimbals with a head chip 22 on the tip part of a head arm 7 and with the base part of the head arm attached to a carriage 14 via a spring plate 13, a dumping material 18 made of an elastic material is provided between the spring plate and the carriage. Also, rib materials 19 and 25 are projectingly provided along the longitudinal direction of the head arm on both upper and lower surfaces of the head arm. Further, a dumper 28 made of an elastic material is attached to both surfaces of the gimbals.
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