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公开(公告)号：US5202864A
公开(公告)日：1993-04-13
申请号：US813930
申请日：1991-12-27
CPC分类号： G11B7/08517 , G11B21/085 , G11B27/105 , G11B7/0946 , G11B7/0956
摘要： In an apparatus in which information is reproduced by projecting/receiving an optical beam to/from a recording carrier having a large number of information tracks, tracking control is performed so as to maintain a reproducing position on an information track by supplying a track deviation signal to an actuator. If this track deviation signal becomes asymmetric by an inclination, etc. of the recording carrier so that a shock is applied to the apparatus, jumping out of a track occurs, resulting in slip-off of the optical beam from the reproducing position. This slip-off can be prevented by detecting a position of a movable support member carrying a focusing lens for projecting and receiving the optical beam and feeding back the position signal to the tracking control system, or by extracting a low-frequency component of an output signal of a control circuit and feeding back the extracted signal to the tracking control system.
摘要翻译： 在通过向具有大量信息轨道的记录载体投射/接收光束来再现信息的装置中，执行跟踪控制，以通过提供轨道偏差信号来保持信息轨道上的再现位置 到致动器。 如果该轨道偏离信号由于记录载体的倾斜等而变得不对称，使得对设备施加冲击，则跳出轨道，导致光束从再现位置脱落。 可以通过检测携带用于投射和接收光束的聚焦透镜的可移动支撑构件的位置并将位置信号反馈到跟踪控制系统，或者通过提取输出的低频分量来防止该滑落 控制电路的信号并将提取的信号反馈到跟踪控制系统。
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公开(公告)号：US5109366A
公开(公告)日：1992-04-28
申请号：US337156
申请日：1989-04-12
CPC分类号： G11B7/08517 , G11B21/085 , G11B27/105 , G11B7/0946 , G11B7/0956
摘要： In an apparatus in which information is reproduced by projecting/receiving an optical beam to/from a recording carrier having a large number of information tracks, tracking control is performed so as to keep a reproducing position on an information track by supplying a track deviation signal to an actuator. If this track deviation signal becomes asymetric by an inclination, etc. of the recording carrier so that a shock is applied to the apparatus, jumping out of a track occurs, resulting in slipping-off of the reproducing position. This slipping-off can be prevented by detecting a position of a movable support member carrying a focusing lens for projecting and receiving the optical beam and feeding back the position signal to the tracking control system, or by extracting a low-frequency component of an output signal of a control circuit and feeding back the extracted signal to the tracking control system.
摘要翻译： 在通过向具有大量信息轨道的记录载体投射/接收光束来再现信息的装置中，执行跟踪控制，以通过提供轨道偏差信号来保持信息轨道上的再现位置 到致动器。 如果该轨道偏离信号由于记录载体的倾斜度等而不对称，使得对设备施加冲击，则跳出轨道，导致再现位置的滑落。 可以通过检测携带用于投射和接收光束的聚焦透镜的可移动支撑构件的位置并将位置信号反馈到跟踪控制系统，或者通过提取输出的低频分量来防止该滑落 控制电路的信号并将提取的信号反馈到跟踪控制系统。
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公开(公告)号：US5331615A
公开(公告)日：1994-07-19
申请号：US964784
申请日：1992-10-22
CPC分类号： G11B7/0946
摘要： The temperature around the tracking actuator is detected with a temperature sensor, and the characteristics of an equivalent digital filter are changed to match the characteristics of the tracking actuator at the detected temperature. When the temperature is low, a current is applied to the focus control coil to raise the temperature of the tracking actuator, thereby essentially matching the transfer functions of the tracking actuator and the equivalent filter.
摘要翻译： 利用温度传感器检测跟踪致动器周围的温度，改变等效数字滤波器的特性，使其与检测温度下跟踪致动器的特性相匹配。 当温度低时，向聚焦控制线圈施加电流以升高跟踪致动器的温度，从而基本上匹配跟踪致动器和等效过滤器的传递函数。
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公开(公告)号：US5257250A
公开(公告)日：1993-10-26
申请号：US450992
申请日：1989-12-15
IPC分类号： G11B7/09 , G11B11/105 , G11B21/08 , G11B7/007
CPC分类号： G11B21/085 , G11B11/10565 , G11B11/10578 , G11B7/0938
摘要： A tracking control target position adjusting track is provided on a recording carrier, where the track contains a preliminarily recorded first position-adjusting signal adjoining one side of track and a second position-adjusting signal adjoining the other side of track. While the reproduction position set on the target-position adjusting track, the tracking control apparatus adjusts the tracking-control target position based on reproduced first and second position-adjusting signals. As a result, the tracking control apparatus can precisely adjust the tracking control target position, thus providing quite satisfactory interchangeability with the corresponding apparatuses.
摘要翻译： 跟踪控制目标位置调整轨迹设置在记录载体上，其中轨道包含预先记录的与轨道一侧相邻的第一位置调整信号和与轨道另一侧相邻的第二位置调节信号。 当在目标位置调整轨道上设置再现位置时，跟踪控制装置基于重放的第一和第二位置调整信号来调整跟踪控制目标位置。 结果，跟踪控制装置可以精确地调整跟踪控制目标位置，从而与相应的装置提供相当满意的可互换性。
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公开(公告)号：US5191566A
公开(公告)日：1993-03-02
申请号：US486845
申请日：1990-03-01
CPC分类号： G11B7/08529 , G11B21/085
摘要： A velocity detection method and an apparatus therefor, in which the relative velocity between a light beam and tracks is detected on the basis of a period for which the light beam crosses the tracks, and under the condition that the light beam has passed by a predetermined position on the way to the target track, the detected relative velocity is compared with a predetermined velocity value so that when the detected relative velocity is larger than the predetermined velocity value the detected relative velocity is invalidated on the assumption that erroneous detection is generated by noise.
摘要翻译： 一种速度检测方法及其装置，其中基于光束穿过轨道的周期，并且在光束已经经过预定的条件的条件下，检测光束和轨迹之间的相对速度 位置，将检测到的相对速度与预定速度值进行比较，使得当检测到的相对速度大于预定速度值时，假设检测到的相对速度由噪声产生错误检测，则无效 。
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公开(公告)号：US4807206A
公开(公告)日：1989-02-21
申请号：US2069
申请日：1987-01-12
CPC分类号： G11B7/0946 , G11B7/0901 , G11B7/0948 , Y10S358/907
摘要： A system for recording or reproducing a signal by focusing and irradiating a light beam on a record carrier from a light source while controlling the light beam to always scan the track on the record carrier is disclosed. A track jump that may occur during recording or reproducing a signal on the record carrier is accurately detected. The reliability of the system is thus improved in such a way as to take appropriate action in case of a track jump.
摘要翻译： 公开了一种通过在控制光束始终扫描记录载体上的轨道的同时聚焦和照射来自光源的记录载体上的光束来记录或再现信号的系统。 准确地检测在记录或再现记录载体上的信号时可能发生的轨迹跳跃。 因此，系统的可靠性得到改善，以便在轨道跳跃的情况下采取适当的动作。
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7.发明授权Recording and reproduction apparatus having improved reliability with respect to externally applied vibration or impact 失效记录和再现装置相对于外部施加的振动或冲击具有改进的可靠性
公开(公告)号：US4692915A
公开(公告)日：1987-09-08
申请号：US738464
申请日：1985-05-28
IPC分类号： G11B15/02 , G11B7/00 , G11B7/004 , G11B7/09 , G11B19/04 , G11B21/10 , G11B33/08 , G11B33/10 , G11B27/36
CPC分类号： G11B19/04 , G11B33/08 , G11B33/10 , G11B7/0946
摘要： A recording and reproduction apparatus for recording signals on a recording medium or reproducing signals recorded on the recording medium, which is so arranged that, with acceleration detectors being provided for detecting accelerations of the apparatus by vibrations or impacts applied from outside, signals from the acceleration detectors are applied to control section for stabilization of the control system and also, for proper treatment upon application of excessively large external vibrations or impacts, with consequent improvements of reliability and stability of the apparatus.
摘要翻译： 一种用于在记录介质上记录信号或再现记录在记录介质上的信号的记录和再现设备，其被设置成使得利用加速度检测器用于通过来自外部的振动或冲击检测设备的加速度，来自加速度的信号 检测器被应用于控制部分以用于控制系统的稳定化，并且在施加过大的外部振动或冲击时进行适当的处理，从而提高了设备的可靠性和稳定性。
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8.发明授权Focusing control apparatus using dynamic target value in relation to land/groove 失效使用相对于陆/沟的动态目标值对焦控制装置
公开(公告)号：US5732051A
公开(公告)日：1998-03-24
申请号：US413489
申请日：1995-03-30
申请人： Hiroyuki Yamaguchi , Mitsuro Moriya , Osamu Yamaguchi , Shin-ichi Yamada , Toshiyuki Kinou , Yoshihiro Kanda
发明人： Hiroyuki Yamaguchi , Mitsuro Moriya , Osamu Yamaguchi , Shin-ichi Yamada , Toshiyuki Kinou , Yoshihiro Kanda
CPC分类号： G11B7/00718 , G11B7/0908
摘要： A focusing control apparatus is provided for controlling focusing of a light beam on a recording medium. The apparatus includes a control mechanism for maintaining the focusing state of the light beam on the recording medium by moving a focus mechanism based on a comparison between an output signal indicative of the focusing state and a target value. The apparatus further includes a target value setting circuit for setting the target value at a first level when the light beam is irradiated on the land track portions of the recording medium; and for setting the target value at a second level when the light beam is irradiated on the groove track portions.
摘要翻译： 提供了一种聚焦控制装置，用于控制光束在记录介质上的聚焦。 该装置包括控制机构，用于通过基于指示聚焦状态的输出信号与目标值之间的比较来移动聚焦机构来保持光束在记录介质上的聚焦状态。 该装置还包括目标值设置电路，用于当光束照射在记录介质的脊迹部分上时，将目标值设置在第一水平; 并且当光束照射在凹槽轨道部分上时将目标值设置在第二水平。
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9.发明授权Data-track search apparatus for locating a desired data track on a record carrier 失效用于在记录载体上定位所需数据轨道的数据轨道搜索装置
公开(公告)号：US5319623A
公开(公告)日：1994-06-07
申请号：US538556
申请日：1990-06-15
CPC分类号： G11B7/08529 , G11B7/08511
摘要： A data-track search apparatus is provided with: a tracking error detection unit for detecting a positioning error between a light beam on a record carrier and a track; a moving unit for moving the light beam on the record carrier in a direction traversing the tracks on the record carrier; a focusing control failure detection unit for detecting a focusing control failure, and a control unit for controlling the moving unit in response to an output signal from the tracking error detection unit during the search for a desired track. The control unit regulates the moving unit so as not to accelerate but to decelerate the moving unit in the event of a focusing control failure.
摘要翻译： 数据轨道搜索装置具有：跟踪误差检测单元，用于检测记录载体上的光束与轨道之间的定位误差; 移动单元，用于沿着横过记录载体上的轨道的方向移动记录载体上的光束; 用于检测聚焦控制故障的聚焦控制故障检测单元，以及用于在搜索期望的轨道期间响应于来自跟踪误差检测单元的输出信号来控制移动单元的控制单元。 控制单元调节移动单元以便不加速，但是在聚焦控制失败的情况下使移动单元减速。
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公开(公告)号：US5268883A
公开(公告)日：1993-12-07
申请号：US948463
申请日：1992-09-22
申请人： Hiroyuki Yamaguchi , Mitsuro Moriya
发明人： Hiroyuki Yamaguchi , Mitsuro Moriya
CPC分类号： G11B7/08517 , G11B7/094
摘要： A data recording/reproducing device has a pickup for recording/reproducing information on disk which has tracks formed on a recording area and a ROM area. A track access device for moving the pickup from a starting track at which the pickup is presently located to a target track includes a moving arrangement for moving the pickup in a direction crossing tracks, a tracking error signal generator for generating an analog signal representing the crossing of the tracks by the pickup, and position detector for detecting the position of the pickup in either one of the recording and ROM areas. Also, for processing the tracking error signal, an amplifier, an offset adder and hysteresis comparator are provided, each having differing operating parameters when the pickup is located in the recording area and then when it is located in the ROM area.
摘要翻译： 数据记录/再现装置具有用于在盘上记录/再现信息的拾取器，该盘具有形成在记录区域和ROM区域上的轨迹。 用于将拾取器从拾取器当前位于的起始轨道移动到目标轨道的轨道存取装置包括用于沿着与轨迹相交的方向移动拾取器的移动装置，用于产生代表横越的模拟信号的跟踪误差信号发生器 的位置检测器，以及位置检测器，用于检测拾音器在记录和ROM区域之一中的位置。 此外，为了处理跟踪误差信号，提供放大器，偏移加法器和滞后比较器，当拾取器位于记录区域中时，当它们位于ROM区域中时，其具有不同的操作参数。
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