公开(公告)号：US07876649B2

公开(公告)日：2011-01-25

申请号：US12289088

申请日：2008-10-20

申请人： Shunsuke Sehara ,  Yasunori Kuwayama

发明人： Shunsuke Sehara ,  Yasunori Kuwayama

IPC分类号： G11B7/00

CPC分类号： G11B7/0945 ,  G11B7/131 ,  G11B2007/0013

摘要： A DSP of the DVD recorder includes a balance value setting portion for determining an appropriate value of a focus balance value α when information is reproduced from an optical disc so as to record the determined focus balance value α0 in a balance value storing portion and to set the same in a first amplifier of a focus error signal generating circuit, and a correction executing portion for reading the focus balance value α0 stored in the balance value storing portion when information is recorded in the optical disc 2 so as to correct the read value to be a focus balance value α1, which is set in the first amplifier of the focus error signal generating circuit.

摘要翻译： DVD记录器的DSP包括用于当从光盘再现信息时确定聚焦平衡值α的适当值以便将所确定的焦距平衡值α0记录在平衡值存储部分中并设置的平衡值设置部分 在聚焦误差信号发生电路的第一放大器中相同;以及校正执行部分，当信息被记录在光盘2中时，读取存储在平​​衡值存储部分中的对焦平衡值α0，以将读取的值校正为 作为在聚焦误差信号发生电路的第一放大器中设定的对焦平衡值α1。

公开(公告)号：US20060087939A1

公开(公告)日：2006-04-27

申请号：US11257120

申请日：2005-10-25

申请人： Yasunori Kuwayama

发明人： Yasunori Kuwayama

IPC分类号： G11B5/09

CPC分类号： G11B7/1267 ,  G11B7/0055 ,  G11B7/00736

摘要： When a main controller in an optical disc device for recording information on a rewritable optical disc having power calibration area (PCA) receives a signal from a disc detection sensor indicating the presence of optical disc, the main controller allows an optical pickup to seek to the PCA, and detects whether the PCA has free space remaining for optimum recording power control (OPC) to be performed 5 times. If it does not remain, the optical pickup subsequently erases all data recorded by trial recording in the PCA to create free space, while if it remains, the optical pickup does not perform the erasing operation. Then, the main controller along with the optical pickup performs OPC using the free space in the PCA. This makes it possible to minimize total time for OPC during the recording, and prevent occurrence of partial drop-out of recording (image cut-off) on the optical disc.

摘要翻译： 当在具有功率校准区域（PCA）的可重写光盘上记录信息的光盘装置中的主控制器接收到指示存在光盘的盘检测传感器的信号时，主控制器允许光学拾取器寻求 PCA，并且检测PCA是否具有剩余的剩余空间以进行最佳记录功率控制（OPC）5次。 如果不存在，则光学拾取器随后将PCA中的尝试记录记录的所有数据擦除以产生可用空间，而如果光学拾取器保留，则光学拾取器不执行擦除操作。 然后，主控制器与光学拾取器一起使用PCA中的可用空间执行OPC。 这使得可以在记录期间最小化OPC的总时间，并且防止在光盘上发生部分记录（图像截止）的脱离。

公开(公告)号：US06760285B2

公开(公告)日：2004-07-06

申请号：US10212810

申请日：2002-08-07

申请人： Minoru Hirashima ,  Yasunori Kuwayama

发明人： Minoru Hirashima ,  Yasunori Kuwayama

IPC分类号： G11B700

CPC分类号： G11B7/094 ,  G11B7/0945

摘要： Focusing balance adjustment of adjusting a servo mechanism is executed so that reproduction quality is optimum in a state where a focusing servo is active (#5). Thereafter, tracking balance adjustment of adjusting the servo mechanism is executed so that a tracking balance deviation is cancelled which is an amplitude difference between the upper side and lower side relative to a reference level of a waveform generated in a tracking error signal when the focal point of a light beam applied to the disk crosses a track of the disk (#7).

摘要翻译： 执行调整伺服机构的聚焦平衡调整，使得在聚焦伺服有效的状态（＃5）中再现质量是最佳的。 此后，执行调整伺服机构的跟踪平衡调整，使得相对于在跟踪误差信号中产生的波形的基准电平，上侧和下侧之间的幅度差被消除的跟踪平衡偏差，当焦点 施加到盘的光束穿过盘的轨道（＃7）。

公开(公告)号：US06229776B1

公开(公告)日：2001-05-08

申请号：US09042477

申请日：1998-03-16

申请人： Yasunori Kuwayama ,  Toshihiko Yamaue

发明人： Yasunori Kuwayama ,  Toshihiko Yamaue

IPC分类号： G11B700

CPC分类号： G11B19/26 ,  G11B7/0037 ,  G11B7/005

摘要： An optical disc apparatus includes a microcomputer. The microcomputer causes an optical disc to rotate at a normal speed or a speed of a predetermined number times higher than the normal speed, according to a data read request supplied from a host computer. A PLL is controlled by the microcomputer so that it outputs, by adjusting the frequency-dividing ratio of a variable frequency divider, a first clock for normal-speed reproduction, a second clock for reproduction at a speed of a predetermined number of times, a third clock intermediate between the first clock and the second clock. When the optical disc is accelerated from the normal speed up to the speed of the predetermined number of times, the third clock is used. When the optical disc approaches a desired speed, the second clock is used to read data.

摘要翻译： 光盘装置包括微型计算机。 根据从主计算机提供的数据读取请求，微型计算机使光盘以正常速度或比正常速度高预定次数的速度旋转。 PLL由微型计算机控制，以通过调节可变分频器的分频比来输出用于正常速度再现的第一时钟，用于以预定次数的速度再现的第二时钟， 第三个时钟在第一个时钟和第二个时钟之间。 当光盘从正常速度加速到预定次数的速度时，使用第三时钟。 当光盘接近所需速度时，第二个时钟用于读取数据。

公开(公告)号：US6088314A

公开(公告)日：2000-07-11

申请号：US009076

申请日：1998-01-20

申请人： Tadashi Tachibana ,  Yasunori Kuwayama ,  Shoji Saito

发明人： Tadashi Tachibana ,  Yasunori Kuwayama ,  Shoji Saito

IPC分类号： G11B7/0037 ,  G11B19/12 ,  G11B20/10 ,  G11B5/09 ,  G11B15/46

CPC分类号： G11B19/12 ,  G11B20/10 ,  G11B7/0037

摘要： A disc reading apparatus includes a microcomputer. The microcomputer calculates, based on amount data, an outer radius (RM) of an area that is recording data. The reading speed on the determined outer radius is set to a previously set speed (V.sub.2) for the outer circumference. When reading desired data, a radius of an inner circumference (r) of the data-recorded area is calculated from time information (identification data) to calculate a reading speed (V.sub.n) for reading the data. That is, since the disc contains data recorded such that the linear velocity per unit area becomes constant, the position of a pick-up and the reading speed are represented by a generally inversely proportional linear equation. Therefore, the reading speed (V.sub.n) can be calculated based on the inner radius (r) of the area recording the data to be read, the inner and outer radii (RS, RM) of the data-recorded area, and previously set inner and outer speeds (V.sub.1, V.sub.2).

摘要翻译： 盘读取装置包括微型计算机。 微计算机根据量数据计算正在记录数据的区域的外半径（RM）。 将确定的外半径上的读取速度设定为对于外周的预先设定的速度（V2）。 当读取所需数据时，根据时间信息（识​​别数据）计算数据记录区域的内圆周（r）的半径，以计算用于读取数据的读取速度（Vn）。 也就是说，由于盘包含记录的数据，使得每单位面积的线速度变得恒定，拾取的位置和读取速度由大致成反比的线性方程表示。 因此，读取速度（Vn）可以基于记录要读取的数据的区域的内半径（r），数据记录区域的内半径（RS，RM）和预先设定的内部 和外部速度（V1，V2）。

公开(公告)号：US6064633A

公开(公告)日：2000-05-16

申请号：US107176

申请日：1998-06-29

申请人： Yasunori Kuwayama ,  Kazuteru Adachi

发明人： Yasunori Kuwayama ,  Kazuteru Adachi

IPC分类号： G11B21/08 ,  G11B17/22

CPC分类号： G11B21/08

摘要： A disc apparatus includes a micro-computer. The micro-computer predicts a number of tracks for deceleration from a total number of tracks to be jumped, to thereby calculate a number of tracks for acceleration from the number of tracks for deceleration and the total number of tracks. A thread motor is accelerated until a number of tracks being jumped becomes equal to the number of tracks for acceleration. Thereafter, the thread motor is decelerated to a rotational speed lower than a determined value.

摘要翻译： 盘装置包括微型计算机。 微型计算机从要跳过的轨迹的总数中预测减少的轨道的数量，从而从减速的轨道数和轨道的总数计算加速轨迹的数量。 螺纹马达被加速直到跳跃的轨道变得等于用于加速的轨道的数量。 此后，螺纹马达减速至低于确定值的转速。

公开(公告)号：US07073097B2

公开(公告)日：2006-07-04

申请号：US09950605

申请日：2001-09-13

申请人： Yasunori Kuwayama

发明人： Yasunori Kuwayama

IPC分类号： G06F11/00

CPC分类号： G06F11/1441 ,  G06F11/0757 ,  G11B27/34 ,  G11B27/36 ,  G11B2220/2562 ,  G11B2220/90

摘要： A two-MCU system includes a main-MCU and a sub-MCU. When any one of operating keys is operated, an operation signal is applied to the sub-MCU. Thereupon, the sub-MCU detects the operation of the operating key, and makes a timer start to count a time period. The sub-MCU, when no specified command is received from the main-MCU irrespective of a lapse of a predetermined time period, determines that the main-MCU is being in a hang-up state. Then, the sub-MCU applies a reset signal to a reset circuit thereby to reset the main-MCU, and the two-MCU system returns from the hang-up.

公开(公告)号：US06990048B2

公开(公告)日：2006-01-24

申请号：US10090744

申请日：2002-03-06

申请人： Takayuki Ono ,  Yasunori Kuwayama

发明人： Takayuki Ono ,  Yasunori Kuwayama

IPC分类号： G11B7/085

CPC分类号： G11B7/08535 ,  G11B7/08517 ,  G11B7/08541 ,  G11B7/0953

摘要： A disk apparatus includes a DSP (digital signal processor), and the DSP controls respective circuit components under instructions of a MCU. During a track jump, a DSP core detects a zero-cross cycle of a TE (Tracking Error) signal just before. If a detected zero-cross cycle is delayed than a target value, the DPS core applies an acceleration pulse of a first predetermined level to a driver, and if the zero-cross cycle is faster than the target value, the DPS core applies a deceleration pulse of a second predetermined level to the driver, whereby an objective lens can be controlled to move at approximately constant speed between adjacent tracks. However, if the zero-cross cycle is considerably delayed than the target value, the DSP core forestalls a reverse rotation of a moving direction of the objective lens against the disk by greatly accelerating the objective lens. Therefore, the number of tracks to have been jumped is not to be counted erroneously.

公开(公告)号：US06469966B1

公开(公告)日：2002-10-22

申请号：US09360329

申请日：1999-07-23

申请人： Tadashi Tachibana ,  Yasunori Kuwayama

发明人： Tadashi Tachibana ,  Yasunori Kuwayama

IPC分类号： G11B700

CPC分类号： G11B19/128 ,  G11B7/0903

摘要： In a disc apparatus, a tracking error signal from an optical pickup is outputted to a micro-computer. The micro-computer discriminates a disc that is different in bit density (track pitch) based on amplitude and/or waveform of the tracking error signal.

摘要翻译： 在光盘装置中，来自光学拾取器的跟踪误差信号被输出到微型计算机。 微计算机基于跟踪误差信号的幅度和/或波形来鉴别位密度（轨道间距）不同的盘。

公开(公告)号：US06252841B1

公开(公告)日：2001-06-26

申请号：US09174778

申请日：1998-10-19

申请人： Hiroshi Osawa ,  Yasunori Kuwayama

发明人： Hiroshi Osawa ,  Yasunori Kuwayama

IPC分类号： G11B1920

CPC分类号： F16F15/363 ,  G11B19/2009 ,  G11B19/2027

摘要： An optical disc apparatus includes a turntable. The turntable is first rotated at a low speed in response to turning on of a reproduce switch on the disc apparatus, and the balancer is, in turn, brought to rest at an optimal position for low speed rotation. When the balancer comes to rest, automatic adjustment is effected. When the automatic adjustment is ended, the turntable is decelerated in rotation to release the balancer from resting. When the rotation speed of the turntable reaches a speed at which the balancer is released from resting, the balancer becomes movable relative to the turntable. Thereafter the turntable is brought into high speed rotation to move the balancer to rest at an optimal position for high speed rotation.

摘要翻译： 光盘装置包括转台。 转盘首先响应于光盘装置上的再现开关的导通而以低速旋转，并且平衡器又被转动到用于低速旋转的最佳位置。 当平衡器静止时，进行自动调节。 当自动调节结束时，转盘旋转减速以使平衡器静止。 当转盘的旋转速度达到平衡器从静止状态释放的速度时，平衡器相对于转盘变得可移动。 此后，转盘进入高速旋转以使平衡器移动到最佳位置以进行高速旋转。