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1. 发明授权

US4835752A Device for driving and controlling optical head for use in optical disk system 失效
标题翻译：用于驱动和控制用于光盘系统的光头的装置
公开(公告)号：US4835752A
公开(公告)日：1989-05-30
申请号：US132167
申请日：1987-12-14
申请人： Keiji Nakatsu , Shigeo Hayashi , Masaharu Ogawa , Osamu Itou , Isao Watanabe , Kunimaro Tanaka
发明人： Keiji Nakatsu , Shigeo Hayashi , Masaharu Ogawa , Osamu Itou , Isao Watanabe , Kunimaro Tanaka
IPC分类号： G11B7/085
CPC分类号： G11B7/08529 , G11B7/08517
摘要： A device for driving and controlling an optical head by forming a spot of a light beam on an optical disk having a plurality of tracks and detecting light from the spot reflected on the optical disk by a pair of optical detectors disposed in the head. This device has: a head actuator for moving a movable portion of the optical head in the radial direction of the disk; a speed detector for detecting the track-crossing speed of the spot from outputs from the optical detectors; a reference speed generator for generating, while accessing to a target track, a reference moving speed signal in accordance with the distance to the target track obtained from the outputs from the optical detectors, the movable head portion being moved on the basis of the reference moving speed signal so that the speed of the movable portion decreases at a position near the target track before the light beam spot reaches this track; a speed error detector for obtaining the difference between outputs from the reference speed generator and the speed detector; and a magnification change circuit adapted for amplifying the outputs from the reference speed generator and the speed detector by a predetermined multiplying factor when the distance between the light beam spot and the target track, or the crossing speed of the spot, becomes smaller than a predetermined value, the magnification change circuit also being adapted for outputting the difference obtained by the speed error detector after multiplying it by the reciprocal of the multiplying factor. The head actuator is driven on the basis of the output from the error detector so as to control the speed of the movable head portion.
摘要翻译：一种用于通过在具有多个轨道的光盘上形成光束点并且通过设置在头部中的一对光学检测器从光盘上反射的光点检测光来驱动和控制光学头的装置。该装置具有：头致动器，用于沿光盘的径向方向移动光头的可移动部分; 速度检测器，用于从光学检测器的输出检测光斑的跟踪交叉速度; 参考速度发生器，用于在根据从所述光学检测器的输出获得的与所述目标轨迹的距离的同时访问目标轨道时生成参考移动速度信号，所述可移动头部基于所述参考移动来移动使得在光束点到达该轨道之前，可动部分的速度在靠近目标轨道的位置处减小; 用于获得来自基准速度发生器和速度检测器的输出之间的差的速度误差检测器; 以及放大率变化电路，其适用于当光束光点与目标光道之间的距离或点的交叉速度变得小于预定的倍数时，以基准速度发生器和速度检测器的输出放大预定的倍率值，倍率变化电路也适于输出由速度误差检测器乘以乘法乘数后的差值。基于来自误差检测器的输出来驱动头致动器，以便控制可动头部的速度。

2. 发明授权

US5070492A Signal decoding apparatus and method 失效
标题翻译：信号解码装置及方法
公开(公告)号：US5070492A
公开(公告)日：1991-12-03
申请号：US317197
申请日：1989-02-28
申请人： Masaharu Ogawa , Yoshiki Nakajima , Osamu Ito , Teruo Furukawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Masafumi Ototake , Minoru Ozaki
发明人： Masaharu Ogawa , Yoshiki Nakajima , Osamu Ito , Teruo Furukawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Masafumi Ototake , Minoru Ozaki
IPC分类号： G11B7/005 , G11B7/007 , G11B7/085 , G11B11/105 , G11B20/10 , G11B20/12 , G11B20/14 , G11B27/30
CPC分类号： G11B20/10222 , G11B11/10565 , G11B20/10009 , G11B20/1217 , G11B20/1403 , G11B27/3027 , G11B7/005 , G11B7/00745 , G11B7/08505 , G11B7/08541 , G11B2220/20
摘要： The present invention relates to apparatus and method for decoding a signal reproduced from an optical disc. The optical disc has a signal format for recording data from an original signal in a data area at the optical disc. The optical disc also has recorded thereon a clock signal having the same phase as the recorded data. During reproduction of the recorded signal from the optical disc, this clock signal is utilized to generate a delayed version of the reproduced data signal. This delayed signal is used to decode the reproduced data signal obtained from the optical disc, thereby enabling a phase shift of the reproduced clock signal to there produced data signal to be eliminated by circuit processing. During the recording on the data area of the optical disc, fixing data for setting phases of data reproducing recording clock and reproducing signal to optimum phases for decoding is recorded. A phase corrector is provided at the optical disc driving apparatus so as to delay the fixing data signal reproduced from the optical disc, whereby a phase shift between the reproduced data signal and the reproduced clock signal can be corrected to an optimum quantity and the data signal at a preformatted area of the optical disc can be reproduced without delay.
摘要翻译：本发明涉及对从光盘再现的信号进行解码的装置和方法。光盘具有用于在光盘的数据区中记录来自原始信号的数据的信号格式。光盘上也记录了与记录数据相同相位的时钟信号。在从光盘再现记录的信号期间，该时钟信号用于产生再现数据信号的延迟版本。该延迟信号用于对从光盘获得的再现数据信号进行解码，从而能够通过电路处理来消除再现的时钟信号到那里产生的数据信号。在光盘的数据区域的记录期间，记录用于将数据再现记录时钟和再现信号的相位设置到用于解码的最佳相位的固定数据。在光盘驱动装置上设置相位校正器，以延迟从光盘再现的固定数据信号，从而可以将再现的数据信号和再生的时钟信号之间的相移校正到最佳量，并且数据信号可以无延迟地再现光盘的预格式化区域。

3. 发明授权

US5117412A Optical disc with servo pattern providing enhanced reliability of servo clock detection and apparatus for accessing the optical disc 失效
标题翻译：带伺服模式的光盘提供伺服时钟检测的增强可靠性和用于访问光盘的设备
公开(公告)号：US5117412A
公开(公告)日：1992-05-26
申请号：US526285
申请日：1990-05-21
申请人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
发明人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
IPC分类号： G11B7/007 , G11B7/013 , G11B7/085 , G11B19/04 , G11B19/20 , G11B27/30
CPC分类号： G11B19/20 , G11B19/04 , G11B27/3027 , G11B7/00745 , G11B7/08529 , G11B7/0857 , G11B7/24085
摘要： An optical disc having a plurality of information tracks. Each information track having a data field including multiple data bytes and a servo field including a first servo byte having a pair of wobbled pits and a second servo byte having a clock pit. The byte length of at least one of the first or second servo bytes being longer than the byte lengths of the data bytes. The increased byte length providing for greater distance between the wobbled pits and the clock pit resulting in increased reliability in clock pit detection. An accessing apparatus for accessing such an optical disc including a phase-locked loop circuit with a frequency dividing ratio that varies in accordance with the various byte lengths.

4. 发明授权

US5107483A Frequency selective optical data record/regenerate apparatus 失效
标题翻译：频率选择光学数据记录/再生装置
公开(公告)号：US5107483A
公开(公告)日：1992-04-21
申请号：US231881
申请日：1988-08-12
申请人： Yoshiki Nakajima , Kunimaro Tanaka , Kyosuke Yoshimoto , Motomu Yoshimura , Mitsuo Maeda , Koichi Takeuchi , Kouichi Yamada , Masaharu Ogawa , Kazuhiko Nakane , Hajime Nakajima , Masayoshi Shimamoto , Fumio Matsuda , Minoru Ozaki
发明人： Yoshiki Nakajima , Kunimaro Tanaka , Kyosuke Yoshimoto , Motomu Yoshimura , Mitsuo Maeda , Koichi Takeuchi , Kouichi Yamada , Masaharu Ogawa , Kazuhiko Nakane , Hajime Nakajima , Masayoshi Shimamoto , Fumio Matsuda , Minoru Ozaki
IPC分类号： G11B7/0045 , G11B7/125 , G11B7/24
CPC分类号： G11B7/126 , G11B7/00453 , G11B7/24
摘要： An apparatus in accordance with the present invention sequentially fixes the wavelength of a light beam irradiated from a light source whose oscillation wavelength sequentially varies to a plurality of different wavelengths to a recording medium to required wavelengths each capable of forming a hole at absorption spectrum of the recording medium, synchronizes timing of change of the wavelength of the light source with timing of recording or regenerating each bit of information, records the optical hole formed in a manner that each bit of information corresponds to the wavelength varying in sequence, and detects the formed hole to regenerate information. Furthermore, the holes formed by the same wavelength are recorded at the positions separated by a distance capable of avoiding interference, while the holes formed by different wavelengths in correspondence to each bit of information are recorded at nearly the same position while that position is slightly displaced at a time, and thereby information is multiple-recorded with high density.
摘要翻译：根据本发明的装置将从振荡波长依次变化的光源照射到多个不同波长的光束的波长的顺序地固定到记录介质上，每个波长能够在吸收光谱上形成孔记录介质，使光源的波长的变化的定时与记录或再生每个信息位的定时同步，以使每个位的信息顺序对应于波长变化的方式记录形成的光孔，并检测形成的孔重新生成信息。此外，由相同波长形成的孔被记录在以避免干扰的距离分开的位置处，而与每个信息位对应的不同波长形成的孔被记录在几乎相同的位置，同时该位置稍微位移同时，信息以高密度多重记录。

5. 发明授权

US5063546A Optic disc with servo pattern and apparatus for accessing the optical disc 失效
标题翻译：具有伺服图案的光盘和用于访问光盘的设备
公开(公告)号：US5063546A
公开(公告)日：1991-11-05
申请号：US166671
申请日：1988-03-11
申请人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
发明人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
IPC分类号： G11B7/007 , G11B7/013 , G11B7/085 , G11B19/04 , G11B19/20 , G11B27/30
CPC分类号： G11B19/20 , G11B19/04 , G11B27/3027 , G11B7/00745 , G11B7/08529 , G11B7/0857 , G11B7/24085
摘要： An optical disc having a plurality of information tracks, each information track having a servo field including a pair of wobbled pits and the clock pit. The distance between one of the wobbled pits and the clock pit in each servo field is selected so that the optical disc includes at least three different types of servo field. These different types of servo field appear in a predetermined sequence for every one or more contiguous information tracks. A transducing apparatus for tranducing such an optical disc has a direction detecting circuit for detecting the moving velocity of a movable portion of an optical head, and a speed detecting circuit for detecting the relative velocity of the movable portion.
摘要翻译：具有多个信息轨道的光盘，每个信息轨迹具有包括一对摆动凹坑和时钟凹坑的伺服场。选择每个伺服磁场中的摆动凹坑之一和时钟凹坑之间的距离，使得光盘包括至少三种不同类型的伺服磁场。对于每一个或多个连续的信息轨迹，这些不同类型的伺服字段以预定的顺序出现。用于变换这种光盘的转换装置具有用于检测光学头的可移动部分的移动速度的方向检测电路和用于检测可动部分的相对速度的速度检测电路。

6. 发明授权

US5321675A Pit spacing in the servo field of an optical disk for speed and direction detection and data retrieval 失效
标题翻译：光盘伺服场中的坑间距用于速度和方向检测和数据检索
公开(公告)号：US5321675A
公开(公告)日：1994-06-14
申请号：US318594
申请日：1989-02-28
申请人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Masafumi Ototake
发明人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Masafumi Ototake
IPC分类号： G11B7/007 , G11B7/085 , G11B7/09
CPC分类号： G11B7/00745 , G11B7/08529 , G11B7/0938
摘要： A sampled servo type optical disc and its driving apparatus is disclosed, in which by cyclically repeating wobbled pits or address pits of the optical disc composed by two significant digits at every N tracks, and preformatting by patterns spaced in different intervals at every track, when the optical disc driving apparatus seeks an object track, the seek direction of the optical head can be detected by the sequence of change of the pattern, and its seek speed can be detected at high speed by the detected result of the pattern, ensuring the speed control of the optical head in response to the detected seek direction and speed.
摘要翻译：公开了一种采样的伺服型光盘及其驱动装置，其中通过循环重复由每个N个磁道由两个有效数字组成的光盘的波形凹坑或地址坑，并且通过在每个轨道上以不同间隔隔开的图案预格式化，光盘驱动装置寻找物体轨道，可以通过图案变化的顺序来检测光学头的寻道方向，并且可以通过检测到的图案的结果高速检测其寻道速度，确保速度响应于检测到的寻道方向和速度来控制光头。

7. 发明授权

US5128916A Optical disc with alternating servo patterns and driving apparatus therefor 失效
标题翻译：具有交替伺服图案的光盘及其驱动装置
公开(公告)号：US5128916A
公开(公告)日：1992-07-07
申请号：US526584
申请日：1990-05-21
申请人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
发明人： Osamu Ito , Masaharu Ogawa , Kyosuke Yoshimoto , Kunimaro Tanaka , Teruo Furukawa , Yoshiki Nakajima
IPC分类号： G11B7/007 , G11B7/013 , G11B7/085 , G11B19/04 , G11B19/20 , G11B27/30
CPC分类号： G11B19/20 , G11B19/04 , G11B27/3027 , G11B7/00745 , G11B7/08529 , G11B7/0857 , G11B7/24085
摘要： An optical disc having a plurality of information tracks, each information track having a servo field including a pair of wobbled pits and a clock pit. The distance between one of the wobbled pits and the clock pit in each servo field is selected such that the optical disc includes at least three different types of servo field. These differnt types of servo field appear in a predetermined sequence for every one or more contiguous information tracks. A driving apparatus for driving such an optical disc has a direction detecting circuit for detecting the moving velocity of a movable portion of an optical head, and a speed detecting circuit for detecting the relative velocity of the movable portion.
摘要翻译：具有多个信息轨道的光盘，每个信息轨道具有包括一对摆动凹坑和时钟凹坑的伺服场。选择每个伺服字段中的摆动凹坑之一和时钟凹坑之间的距离，使得光盘包括至少三种不同类型的伺服字段。对于每一个或多个连续的信息轨道，这些不同类型的伺服字段以预定的顺序出现。用于驱动这种光盘的驱动装置具有用于检测光学头的可移动部分的移动速度的方向检测电路和用于检测可动部分的相对速度的速度检测电路。

8. 发明授权

US4887254A Optical disk drive device for positioning a carriage to a retract position 失效
标题翻译：用于将托架定位到缩回位置的光盘驱动装置
公开(公告)号：US4887254A
公开(公告)日：1989-12-12
申请号：US172525
申请日：1988-03-24
申请人： Keiji Nakatsu , Katsuaki Kamitsu , Masaharu Ogawa
发明人： Keiji Nakatsu , Katsuaki Kamitsu , Masaharu Ogawa
IPC分类号： H04N5/85 , G11B7/085 , G11B19/20 , G11B21/12 , G11B21/22
CPC分类号： G11B19/20 , G11B7/08582
摘要： A retract device includes a signal instruction circuit for providing the number of tracks to be traversed, the access start instruction, and the retract instruction and the reference voltage generating circuit responsive to these instructions to provide the residual track number and the carriage moving signal and operates such that, immediately before the drive device is to stop operating a carriage having an optical head mounted thereon is moved by an access operation from a track to a first predetermined position according to the access start instruction, and is then moved from the first predetermined position to a second predetermined position according to the retract instruction at a predetermined reference speed.

9. 发明授权

US4955009A Optical disk drive apparatus having counter disable at seek start-up 失效
标题翻译：在寻道启动时具有计数器禁用的光盘驱动装置
公开(公告)号：US4955009A
公开(公告)日：1990-09-04
申请号：US184985
申请日：1988-04-22
申请人： Keiji Nakatsu , Masaharu Ogawa
发明人： Keiji Nakatsu , Masaharu Ogawa
IPC分类号： G11B7/085 , G11B21/08
CPC分类号： G11B7/08541
摘要： In an optical disk drive apparatus for driving an optical disk having tracks for recording information, an optical head focuses a light beam onto a spot on a track on the optical disk, and an actuator moves the optical head, thereby causing the spot of the light beam to move from its current track to a target track in order to access the target track. A track counter counts the tracks moved by the spot of the light beam. The counting of tracks is disabled for an interval at the start of each track access operation to prevent miscounting caused by jitter that occurs when initiating a track access operation.

10. 发明授权

US4788421A Apparatus for controlling relative movement of an optical head to an optical disk with velocity detection 失效
标题翻译：用于通过速度检测来控制光头相对于光盘的相对移动的装置
公开(公告)号：US4788421A
公开(公告)日：1988-11-29
申请号：US863026
申请日：1986-05-14
申请人： Masaharu Ogawa , Keiji Nakatsu
发明人： Masaharu Ogawa , Keiji Nakatsu
IPC分类号： G11B7/085 , G11B7/09 , G01J1/20
CPC分类号： G11B7/0946 , G11B7/08529
摘要： A control apparatus comprises a linear actuator (49) which moves an optical head (37) having a photo detector (45) in a radial direction of an optical disk (33), a velocity detection circuit (57) which detects relative moving velocity of the optical head (37) to the optical disk (33) during track accessing, and a linear actuator drive control circuit (50) which controls the actuator (49) in response to the detected velocity. The velocity detection circuit (57) generates a digital signal which corresponds to a cycle of an RF output signal of the photo detector (45) and, in response to this digital signal, it further generates an analog signal, which corresponds to the inverse of the cycle of the RF signal, to be outputted as the relative moving velocity of the optical head (37).
摘要翻译：控制装置包括线性致动器（49），其沿着光盘（33）的径向移动具有光检测器（45）的光学头（37），速度检测电路（57），其检测相对移动速度轨道存取期间到光盘（33）的光头（37），以及响应于检测到的速度控制致动器（49）的线性致动器驱动控制电路（50）。速度检测电路（57）产生对应于光检测器（45）的RF输出信号的周期的数字信号，并且响应于该数字信号，其进一步产生模拟信号，其对应于 RF信号的周期作为光头（37）的相对移动速度输出。

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