-
公开(公告)号：US06339581B1
公开(公告)日：2002-01-15
申请号：US09425178
申请日：1999-10-22
IPC分类号： G11B700
CPC分类号： G11B7/005 , G11B7/00745
摘要： A disc player having a prepit detecting circuit which can correctly detect prepits even if phases or amplitude levels of a plurality of read signals read out from a recording disc are deviated from each other. A phase difference between a first read signal and a second read signal read out by first and second reading elements arranged in two regions divided along the direction of recording tracks of a recording disc is detected. A first phase correction read signal is obtained by adjusting the phase of the first read signal by an amount according to the phase difference. A differential value between the first phase correction read signal and the second read signal is outputted as a prepit detection signal.
摘要翻译： 即使从记录盘读出的多个读取信号的相位或幅度水平彼此偏离，也可以正确地检测预凹坑的预制坑检测电路。 检测由沿着记录盘的记录轨道的方向划分的两个区域中排列的第一和第二读取元件读出的第一读取信号和第二读取信号之间的相位差。 通过根据相位差调整第一读取信号的相位来获得第一相位校正读取信号。 输出第一相位校正读取信号和第二读取信号之间的差分值作为预坑检测信号。
-
公开(公告)号：US06324136B1
公开(公告)日：2001-11-27
申请号：US09270863
申请日：1999-03-17
IPC分类号： G11B700
CPC分类号： G11B27/3027 , G11B7/00375 , G11B7/0045 , G11B7/00718 , G11B27/24 , G11B2220/218 , G11B2220/2562
摘要： A recording time point setting method and apparatus are provided. The recording time point setting method is a method of setting a recording time point for recording an information piece into one of a plurality of predetermined areas on a recording medium on the basis of a plurality of marks. The marks are pre-recorded on the recording medium at predetermined intervals. The locations of the marks correspond to the locations of the predetermined areas, respectively. The locations of the predetermined areas are predetermined on the basis of a time length of the information piece. In this method, firstly, at least one of the marks is detected. Then, an expectation signal is generated on the basis of the time length of the information piece, and then, a time point at which an output of the expectation signal is started is synchronized with a time point at which the at least one of the marks is detected. The expectation signal is a signal for determining an expectation time point that one of the marks, except for the at least one of the marks already detected, is to be detected. Next, the expectation time point determined by the expectation signal is set as the recording time point.
摘要翻译： 提供记录时间点设定方法和装置。 记录时间点设定方法是根据多个标记将记录信息片的记录时间点设定在记录介质上的多个预定区域之一的方法。 标记以预定间隔预先记录在记录介质上。 标记的位置分别对应于预定区域的位置。 基于信息片的时间长度来预先确定预定区域的位置。 在该方法中，首先，检测到至少一个标记。 然后，基于信息片的时间长度生成期望信号，然后，期望信号的输出开始的时间点与至少一个标记的时间点同步 被检测到。 期望信号是用于确定期望时间点的信号，除了检测到的已经检测到的至少一个标记之外，其中一个标记被检测。 接下来，由期望信号确定的期望时间点被设定为记录时间点。
-
公开(公告)号：US5212675A
公开(公告)日：1993-05-18
申请号：US824602
申请日：1992-01-23
申请人： Junichi Yoshino , Yoshitaka Shimoda
发明人： Junichi Yoshino , Yoshitaka Shimoda
CPC分类号： G11B7/0903 , G11B7/08517 , G11B7/094 , G11B7/0941 , G11B7/0943
摘要： There is disclosed an apparatus for detecting position of a light spot, suitable for the tracking control or the track-jumping control at the time of reproducing an optical disk. This light spot position detector has a circuit configuration featured below. Namely, three light beams are used to provide three push-pull outputs from the respective light beams to apply a predetermined operation to those push-pull outputs, thereby to generate a light spot position signal permitting discrimination as to whether or not the light spot is in the on-track state. Further, by gain controlling the light spot position signal thus generated, a suitable signal is permitted to be outputted even when a signal is undesirably attenuated for any reason.
摘要翻译： 公开了一种用于检测在再现光盘时适用于跟踪控制或轨迹跳跃控制的光点位置的装置。 该光点位置检测器具有以下特征的电路结构。 也就是说，使用三个光束来提供来自各个光束的三个推挽输出，以对这些推挽输出施加预定的操作，从而产生光斑位置信号，以允许对光点是否为 在轨上状态。 此外，通过增益控制如此产生的光点位置信号，即使由于任何原因使信号不期望地衰减，允许输出合适的信号。
-
公开(公告)号：US06480448B1
公开(公告)日：2002-11-12
申请号：US09375565
申请日：1999-08-17
申请人： Eisaku Kawano , Yoshitaka Shimoda , Hidehiro Ishii , Eiji Muramatsu , Masahiro Kato , Kunihiko Horikawa
发明人： Eisaku Kawano , Yoshitaka Shimoda , Hidehiro Ishii , Eiji Muramatsu , Masahiro Kato , Kunihiko Horikawa
IPC分类号： G11B700
CPC分类号： G11B7/126 , G11B7/0045
摘要： In a disc player, a CAL pattern is recorded in a disc-like optical recording medium during a recording stand-by time period, which is yielded by a difference between a data rate in inputting information to a disc player 50 and a recording rate in recording information into the optical recording medium. The CAL pattern is reproduced from the optical recording medium, the reproduced pattern is evaluated, and an irradiation intensity of a laser beam is optimized for recording information in the optical recording medium, by a laser-output controller 30.
摘要翻译： 在光盘播放器中，在记录待机时间段期间，在盘状光学记录介质中记录CAL图案，其由输入到盘播放器50的信息的数据速率与记录速率之间的差异而产生 将信息记录到光学记录介质中。 通过激光输出控制器30，从光学记录介质再现CAL图案，评估再现图案，并优化激光束的照射强度以记录在光学记录介质中的信息。
-
公开(公告)号：US5216652A
公开(公告)日：1993-06-01
申请号：US824600
申请日：1992-01-23
申请人： Junichi Yoshio , Yoshitaka Shimoda
发明人： Junichi Yoshio , Yoshitaka Shimoda
CPC分类号： G11B7/0903
摘要： A light spot position detector reliably effects spot-on-track detection even if the reflectivities of recording tracks and intertrack areas of an optical disk are substantially the same as each other. A tracking error signal used to control a scanning spot applied to the recording tracks on the optical disk is produced by mixing light spot position signals that are generated according to the three beam method and the push pull method from light beams reflected from light spots on the signal recording surface of the optical disk.
-
公开(公告)号：US5446101A
公开(公告)日：1995-08-29
申请号：US318741
申请日：1994-10-18
申请人： Noboru Anazawa , Yoshitaka Shimoda
发明人： Noboru Anazawa , Yoshitaka Shimoda
CPC分类号： C08J5/18 , C08L27/08 , C08J2327/08 , C08L2205/02
摘要： A composite vinylidene chloride copolymer composition excellent in processability which comprises a vinylidene chloride copolymer A having a molecular weight of not less than 50,000 and not more than 300,000 and a vinylidene chloride copolymer B having a molecular weight of not less than 5,000 and not more than the smaller one of either 0.8 times the weight average molecular weight of the vinylidene chloride copolymer A or 80,000, and a monolayer film which comprises the composite vinylidene chloride copolymer composition and is excellent in various properties including barrier property, non-extractability by oily foods and high frequency sealability, and is suitable as a barrier packaging material and wrapping film used for ham, sausage and other like foods.
摘要翻译： 一种加工性优异的复合偏氯乙烯共聚物组合物，其含有分子量为50,000以上30万以下的偏二氯乙烯共聚物A和分子量为5000以上的偏二氯乙烯共聚物B 偏二氯乙烯共聚物A的重均分子量的0.8倍或80,000的较小的一种，以及包含该复合偏氯乙烯共聚物组合物的单层膜，并且具有优异的各种性能，包括阻隔性，油性食品的非萃取性和高 频率密封性好，适合用作火腿，香肠等食品的阻隔性包装材料和包膜。
-
17.发明授权Actuator position detector, actuator position controller and track search controller 失效执行器位置检测器，执行器位置控制器和轨迹搜索控制器
公开(公告)号：US5341353A
公开(公告)日：1994-08-23
申请号：US102111
申请日：1993-08-04
申请人： Junichi Yoshio , Yoshitaka Shimoda
发明人： Junichi Yoshio , Yoshitaka Shimoda
CPC分类号： G11B7/08517 , G11B7/0903 , G11B7/0941
摘要： A track search controller has three two-segment photodetectors, three subtracters associated respectively with the two-segment photodetectors, a processing circuit, and a servo control cirucit. Each of the photodetectors produces two output signals based on a light beam reflected from an optical disk. Each of the subtracters produces a differential output signal representing the difference between the output signals from the associated photodetector. The processing circuit generates an actuator position signal from the output signals from the subtracters. The actuator position signal contains a component indicative of a deviation of the actuator due to its vibration. The servo control circuit controls an actuator, which actuates a laser beam source, so that the actuator position signal will be of a constant value.
摘要翻译： 的轨道搜索控制器具有三个两段式光检测器，分别与所述两个段光电检测器，一个处理电路，以及一个伺服控制cirucit相关联的三个减法器。 每个光电检测器的基于从光盘反射的光束的两个输出信号。 每一减法器产生代表从相关联的光电检测器的输出信号之差的差分输出信号。 处理电路根据来自减法器的输出信号产生致动器位置信号。 致动器位置信号包含指示致动器由于其振动的偏差的分量。 伺服控制电路控制致动器，其致动激光束源，使致动器位置信号为恒定值。
-
-
-
-
-
-
搜索结果
17 条记录 (耗时 0.019 秒)
