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1. 发明授权

US5495463A Controller and control method of laser power for recording information in an optical record medium 失效
标题翻译：用于在光学记录介质中记录信息的激光功率的控制器和控制方法
公开(公告)号：US5495463A
公开(公告)日：1996-02-27
申请号：US166878
申请日：1993-12-15
申请人： Toshiya Akagi , Yasuhiro Tai
发明人： Toshiya Akagi , Yasuhiro Tai
IPC分类号： G11B7/00 , G11B7/0045 , G11B7/125
CPC分类号： G11B7/126 , G11B7/0045
摘要： In a laser power controller, a part of laser beam emitted from a laser diode 1 is detected with a photodetector 2. The operational processor 3 controls a driver 5 so that the light-emitting power of the laser diode 1 has prescribed values, and the driver 5 drives the laser diode 1. The record powers are set beforehand in one or more gap sections existing between record areas, and the operational processor 3 stores the results of the operation in an external memory 4. On recording, the results stored in the external memory 4 are read by the operational processor 3 so as to set the record powers. Thus, the record powers can be set stably even for a fast recording rate.
摘要翻译：在激光功率控制器中，用光电检测器2检测从激光二极管1发射的激光束的一部分。操作处理器3控制驱动器5，使得激光二极管1的发光功率具有规定值，驱动器5驱动激光二极管1.记录功率预先设置在存在于记录区域之间的一个或多个间隙部分中，并且操作处理器3将操作结果存储在外部存储器4中。在记录时，存储在外部存储器4由操作处理器3读取，以便设定记录功率。因此，即使对于快速记录速率也能够稳定地设定记录功率。

2. 发明授权

US07903515B2 Optical disc drive 有权
标题翻译：光盘驱动器
公开(公告)号：US07903515B2
公开(公告)日：2011-03-08
申请号：US12256675
申请日：2008-10-23
申请人： Kenichi Morikawa , Hiroshige Ishibashi , Takahiro Sato , Yasuhiro Tai , Yoshiyuki Hashimoto
发明人： Kenichi Morikawa , Hiroshige Ishibashi , Takahiro Sato , Yasuhiro Tai , Yoshiyuki Hashimoto
IPC分类号： G11B7/00
CPC分类号： G11B7/0945 , G11B7/0956 , G11B7/13925 , G11B2007/0006
摘要： An optical disc drive according to the present invention can read data from any of multiple types of optical discs, of which the information storage layers are located at mutually different depths under their surface. When this drive is loaded with an optical disc, the servo controller of the drive changes a first type of drive signal to adjust a focus position by changing distances from the lens to the disc and/or a second type of drive signal to adjust tilt of the lens by changing the angles defined by the lens with respect to the disc a number of times, thereby changing settings to be determined by a combination of the focus position and the tilt. A signal quality rater measures multiple index values to rate the quality of a reflected light signal as the settings are changed. Then, the optical disc drive recognizes the type of the given optical disc based on those index values and reads data from the optical disc recognized.
摘要翻译：根据本发明的光盘驱动器可以从多种类型的光盘中的任何一种读取数据，其中信息存储层位于其表面下彼此不同的深度处。当该驱动器装载有光盘时，驱动器的伺服控制器通过改变从透镜到盘的距离和/或第二类型的驱动信号来改变第一类型的驱动信号以调整对焦位置以调整通过将透镜相对于盘定义的角度改变多次，从而改变由聚焦位置和倾斜的组合确定的设置。信号质量评估者测量多个索引值以对设置改变时的反射光信号的质量进行评估。然后，光盘驱动器基于这些索引值识别给定光盘的类型，并从所识别的光盘读取数据。

3. 发明授权

US07035175B2 Offset measuring method 有权
公开(公告)号：US07035175B2
公开(公告)日：2006-04-25
申请号：US10221877
申请日：2002-03-25
申请人： Machiko Kitayama , Masaya Kuwahara , Yasuhiro Tai
发明人： Machiko Kitayama , Masaya Kuwahara , Yasuhiro Tai
IPC分类号： G11B7/095
CPC分类号： G11B7/094 , G11B7/0901
摘要： An offset measuring method is for measuring an offset based on an optical beam reflected by an information medium, in a recording and reproduction apparatus including an optical pickup placed on transportation means so as to be driven along a radial direction of the information medium. The method includes the steps of directing an optical beam toward a first measuring position, thereby measuring a first offset amount based on the optical beam reflected at the first measuring position; moving the transportation means by a first distance in a first direction along the radial direction; driving the optical pickup by a second distance, which is equal to the first distance, in a second direction; and directing an optical beam toward a second measuring position, thereby measuring a second offset amount based on the optical beam reflected at the second measuring position.

4. 发明授权

US5155716A Servo system for optical recording/reproducing drive 失效
标题翻译：伺服系统，用于光记录/再生驱动
公开(公告)号：US5155716A
公开(公告)日：1992-10-13
申请号：US703639
申请日：1991-05-21
申请人： Ryoichi Imanaka , Masayoshi Abe , Yasuhiro Tai
发明人： Ryoichi Imanaka , Masayoshi Abe , Yasuhiro Tai
IPC分类号： G11B7/085 , G11B7/09
CPC分类号： G11B7/0943
摘要： A digital servo system for use in an optical recording/reproducing apparatus equipped with an optical system for illuminating an optical recording medium with a light beam to record and reproduce an information signal on and from the optical recording medium, the servo system being for more accurately performing a tracking and focusing control of the light beam with respect to the optical recording medium. The servo system is provided with a plurality of photodetectors to obtain a servo error signal which is in turn supplied to an attenuator and then supplied to an analog-to-digital converter to be digitized so as to constitute a digital filter. The servo system is arranged so as to set the attenuation factor of the attenuator so that the input signal of the analog-to-digital converter is kept in a predetermined range. This permits the tracking and focusing control with a high precision and further allows an AGC amplifier having a high-speed automatic gain-controllable function to be arranged to be digitally controllable.

5. 发明授权

US07233551B2 Optical disk control device for time-division-multiplexing and A/D conversion 有权
标题翻译：用于时分复用和A / D转换的光盘控制装置
公开(公告)号：US07233551B2
公开(公告)日：2007-06-19
申请号：US10025998
申请日：2001-12-26
申请人： Masayoshi Abe , Kouju Konno , Teruhiko Izumi , Yasuhiro Tai
发明人： Masayoshi Abe , Kouju Konno , Teruhiko Izumi , Yasuhiro Tai
IPC分类号： G11B7/04
CPC分类号： G11B7/005 , G11B7/09 , G11B20/02 , G11B20/10
摘要： An optical disk control device comprises a playback signal detection unit for detecting data recorded on a disk by irradiating the disk with a converged light beam; a signal switching unit for successively selecting plural data signals obtained by the playback signal detection unit, and performing time-division-multiplexing on the selected signals; an A/D conversion unit for converting an analog signal which has been time-division-multiplexed by the signal switching unit, into a digital signal; an A/D conversion command unit for generating an A/D conversion command of the A/D conversion unit; a serial transfer unit for serial-transferring the command signal generated by the A/D conversion command unit; a serial reception unit for receiving the signal from the serial transfer unit, and controlling the signal selection operation of the signal switching unit on the basis of the received signal; and an arithmetic unit for generating an optical disk drive controlling signal by performing arithmetic processing on the digital signal outputted from the A/D control unit. Therefore, the number of signal lines required for connection between the playback signal detection unit and the A/D conversion unit can be significantly reduced.
摘要翻译：光盘控制装置包括：重放信号检测单元，用于通过用会聚的光束照射盘来检测记录在盘上的数据; 信号切换单元，用于连续选择由重放信号检测单元获得的多个数据信号，并对所选择的信号执行时分复用; A / D转换单元，用于将由信号切换单元进行时分复用的模拟信号转换成数字信号; A / D转换指令单元，用于产生A / D转换单元的A / D转换命令; 串行传送单元，用于串行传送由A / D转换命令单元产生的命令信号; 串行接收单元，用于从串行传送单元接收信号，并且基于接收信号控制信号切换单元的信号选择操作; 以及运算单元，用于通过对从A / D控制单元输出的数字信号进行算术处理来产生光盘驱动控制信号。因此，可以显着地减少重放信号检测单元和A / D转换单元之间连接所需的信号线的数量。

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