公开(公告)号：US5179545A

公开(公告)日：1993-01-12

申请号：US614626

申请日：1990-11-16

申请人： Hisamitsu Tanaka ,  Motoyuki Suzuki ,  Yoshio Miura

发明人： Hisamitsu Tanaka ,  Motoyuki Suzuki ,  Yoshio Miura

IPC分类号： G11B7/09 ,  G11B7/085

CPC分类号： G11B7/08517

摘要： A tracking control apparatus is provided for controlling a displacement error between a pickup system and a track when reproducing information recording on an information-recording and reproducing medium having tracks on which information is recorded or reproduced. The tracking control apparatus includes on-track detecting means for detecting a light beam is located on the track, traveling-direction detecting means for detecting the direction of the pickup system traveling toward the track from the displacement error and the output signal supplied by the on-track detecting means and outputting a traveling-direction signal representing the traveling direction, track-slippage detecting means for detecting a track-slippage signal representing the direction of the light beam being slipped out of a target track from the traveling-direction signal supplied by the traveling-direction detecting means, and tracking control means for supplying as a control signal the displacement error when the light beam is located on the target track or as a control signal the track-slippage signal supplied by the track-slippage detecting means when the light beam is not spotted on the target track and driving the pickup system in a manner to allowing the light beam to follow the tracks.

摘要翻译： 提供一种跟踪控制装置，用于当在具有记录或再现信息的信息的信息记录和再现介质上再现信息记录时，控制拾取系统和轨道之间的位移误差。 跟踪控制装置包括：轨道检测装置，用于检测位于轨道上的光束，行进方向检测装置，用于检测从位移误差向轨道行进的拾取系统的方向以及由on 轨迹检测装置，并输出表示行进方向的行进方向信号，轨道滑动检测装置，用于检测表示从目标轨道滑出的光束的方向的轨道滑动信号，该轨迹滑动信号从由 行进方向检测装置和跟踪控制装置，用于当光束位于目标轨道上时作为控制信号提供位移误差，或者作为控制信号提供由轨道滑动检测装置提供的轨道滑动信号，当轨迹滑动检测装置 在目标轨道上不会发出光束并以允许光束f的方式驱动拾取系统 在轨道上。

公开(公告)号：US5541909A

公开(公告)日：1996-07-30

申请号：US137969

申请日：1993-10-19

申请人： Junji Nakajima ,  Kunikazu Ohnishi ,  Tooru Sasaki ,  Makoto Miyamoto ,  Masaaki Kurebayashi ,  Yoshio Suzuki ,  Masayuki Inoue ,  Hisamitsu Tanaka ,  Motoyuki Suzuki ,  Yukio Fukui

发明人： Junji Nakajima ,  Kunikazu Ohnishi ,  Tooru Sasaki ,  Makoto Miyamoto ,  Masaaki Kurebayashi ,  Yoshio Suzuki ,  Masayuki Inoue ,  Hisamitsu Tanaka ,  Motoyuki Suzuki ,  Yukio Fukui

IPC分类号： G11B7/0037 ,  G11B7/005 ,  G11B7/013 ,  G11B7/09 ,  G11B7/135 ,  G11B7/24 ,  G11B7/243

CPC分类号： G11B7/24 ,  G11B7/0051 ,  G11B7/0903 ,  G11B7/0909 ,  G11B7/0941 ,  G11B7/1365 ,  G11B7/1398 ,  G11B7/0945 ,  G11B7/24085 ,  G11B7/243

摘要： A masking type light control layer for decreasing its reflection factor in a high-temperature region is formed on phase pits of an optical disc, and the phase pit depth is set to a predetermined value. A light spot for reproduction is shaped to an elliptical form and two sub-flux beams on the optical disc are spaced by 5/4 track pitch from a principal flux beam in the radial direction of the optical disc. The kind of optical disc is discriminated and reproduction laser power and characteristics of an equalizer circuit are switched in accordance with the type of an optical disc. Through this, a stable servo signal detection can be ensured and repetitive reproduction characteristics can be improved.

摘要翻译： 在光盘的相位凹坑上形成用于降低高温区域的反射系数的掩模型光控制层，将相位深度设定为规定值。 用于再现的光斑被成形为椭圆形，并且光盘上的两个子光束在光盘的径向方向上从主通量束间隔开+ E，fra 5/4 + EE轨道间距。 根据光盘的类型，鉴别出光盘的种类和再现激光功率和均衡器电路的特性。 由此，能够确保稳定的伺服信号检测，能够提高重复再生特性。

公开(公告)号：US6091678A

公开(公告)日：2000-07-18

申请号：US2830

申请日：1998-01-05

申请人： Tetsuya Fushimi ,  Toru Kawashima ,  Hisataka Sugiyama ,  Hiroyuki Minamura ,  Yoshio Suzuki ,  Hisamitsu Tanaka

发明人： Tetsuya Fushimi ,  Toru Kawashima ,  Hisataka Sugiyama ,  Hiroyuki Minamura ,  Yoshio Suzuki ,  Hisamitsu Tanaka

IPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/09 ,  G11B7/00

CPC分类号： G11B7/005 ,  G11B7/007 ,  G11B7/00745 ,  G11B7/0901

摘要： For a disk of a land/groove scheme with land tracks and grooves appearing alternately, in order to enable stable and reliable reproduction of information as recorded on a disk by stably and reliably detecting a specific position at which a land track and groove change therebetween, a technique is employed for detecting the position whereat one land track is changed to a groove, or vice versa, by utilizing an HPP signal rather than an RF signal in cases where an optical head 103 attempts to reproduce certain information at the pit formation position of a disk 101. In addition, detect the polarity--positive or negative--of a pit signal appearing in the HPP signal, and then detect the position whereat the land track and groove change therebetween based on the position at which the order or sequence thereof changes, thereby permitting effectuation of optical head's tracking control and focus control by a method suitable for its respective parts.

摘要翻译： 对于具有交替出现的轨迹和凹槽的平台/凹槽方案的盘，为了通过稳定可靠地检测在其间的凹槽轨道和槽的变化的特定位置来使得能够稳定可靠地再现记录在盘上的信息， 在使用HPP信号而不是RF信号的情况下，采用一种技术来检测一条脊轨道改变为凹槽的位置，反之亦然。在光头103尝试在凹坑形成位置再现某些信息的情况下， 另外，检测出现在HPP信号中的凹坑信号的极性正或负，然后根据其顺序或顺序改变的位置来检测纹间和凹槽之间的位置。 从而可以通过适用于其各自部件的方法来实现光学头的跟踪控制和聚焦控制。