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1. 发明申请

US20120307610A1 OPTICAL DISC APPARATUS 有权
标题翻译：光盘设备
公开(公告)号：US20120307610A1
公开(公告)日：2012-12-06
申请号：US13461939
申请日：2012-05-02
申请人： Kazuki KAJIKAWA
发明人： Kazuki KAJIKAWA
IPC分类号： G11B7/00
CPC分类号： G11B7/0946 , G11B7/0948
摘要： An optical disc apparatus includes an optical pickup, a signal generation section which generates a total reflection signal and a focus error signal, and a servo control section which controls optical pickup. The optical disc apparatus further includes a main control section which binarizes the track cross signal by using a predetermined threshold value and, by using the binarized track cross signal, checks the tracing state of a track. The main control section controls the servo control section to check, by tracing one turn of the track of an optical disc, whether or not a tracking servo deviation occurs. When a tracking servo deviation occurs during the tracing, the main control section controls the servo control section to make the check once again. When, in the check made once again, a tracking servo deviation is found to occur again, the main control section increases the threshold value used in binarization.
摘要翻译：光盘装置包括光拾取器，产生全反射信号和聚焦误差信号的信号产生部分以及控制光学拾取器的伺服控制部分。该光盘装置还包括主控制部分，其通过使用预定的阈值对轨道交叉信号进行二值化，并且通过使用二进制的轨道交叉信号来检查轨道的跟踪状态。主控制部通过跟踪光盘的轨道的一圈来控制伺服控制部来检查跟踪伺服偏差是否发生。在跟踪期间发生跟踪伺服偏差时，主控制部分控制伺服控制部分重新进行检查。当再次检查时，再次发现跟踪伺服偏差，主控制部分增加二值化中使用的阈值。

2. 发明授权

US07830642B2 Disc apparatus 失效
标题翻译：盘装置
公开(公告)号：US07830642B2
公开(公告)日：2010-11-09
申请号：US12108817
申请日：2008-04-24
申请人： Kazuki Kajikawa , Futoshi Takeda , Toshiaki Fukui , Kazuhiro Ichikawa , Kazuto Kitagawa
发明人： Kazuki Kajikawa , Futoshi Takeda , Toshiaki Fukui , Kazuhiro Ichikawa , Kazuto Kitagawa
IPC分类号： H02H5/04
CPC分类号： G11B33/121
摘要： A disc apparatus which can judge accurately whether or not a spindle motor is at fault due to a short circuit is provided.A disc apparatus (1) includes a spindle motor (3) which rotates a disc (2), a differential operational amplifier (5) which successively detects output voltages of the spindle motor (3), and a failure judgment unit (10) which calculates an average voltage of the plural output voltages and judges whether or not the spindle motor (3) is at fault in accordance with the average voltage and the output voltages. When counting number of occurrences of a specific state which indicates that one of the two output voltages detected successively is larger than the average voltage and other of the two output voltages is smaller than the average voltage, the failure judgment unit (10) judges that the spindle motor (3) is at fault. Consequently, the failure judgment unit (10) can rapidly and accurately judge the failure in the spindle motor (3) without the influence from the unexpected change of the output voltages.
摘要翻译：提供一种能够准确判断主轴电动机是否由于短路而发生故障的盘装置。盘装置（1）包括：旋转盘（2）的主轴马达（3），连续地检测主轴马达（3）的输出电压的差分运算放大器（5）;以及故障判断单元计算多个输出电压的平均电压，并根据平均电压和输出电压判断主轴电动机（3）是否有故障。当计算指示连续检测到的两个输出电压中的一个大于平均电压并且两个输出电压中的另一个小于平均电压的特定状态的发生次数时，故障判断单元（10）判断为主轴电机（3）故障。因此，故障判断单元10能够不受输出电压的意外变化的影响而快速，准确地判断主轴电动机3的故障。

3. 发明申请

US20100074065A1 OPTICAL DISK DEVICE 有权
标题翻译：光盘设备
公开(公告)号：US20100074065A1
公开(公告)日：2010-03-25
申请号：US12560782
申请日：2009-09-16
申请人： Kazuki Kajikawa , Toshiaki Fukui
发明人： Kazuki Kajikawa , Toshiaki Fukui
IPC分类号： G11B7/00
CPC分类号： G11B7/08511 , G11B7/094 , G11B7/0945 , G11B2007/0013
摘要： This optical disk device includes a pickup, an offset means, a focus servo means, and a layer jump means. The offset means generates a focus error signal on the basis of the output of the pickup, and applies an offset voltage to that focus error signal. And the layer jump means performs layer jump operation, including kick start operation, kick end operation taking a second threshold value as a reference, brake start operation taking a third threshold value as a reference, and brake end operation. Moreover, before executing this layer jump operation, the layer jump means changes this second threshold value or this third threshold value, according to the value of the offset voltage.
摘要翻译：该光盘装置包括拾取器，偏移装置，聚焦伺服装置和层跳转装置。偏移装置根据拾取器的输出产生聚焦误差信号，并向该聚焦误差信号施加偏移电压。并且层跳转装置执行层跳转操作，包括起动开始操作，以第二阈值作为基准的脚蹬结束操作，以第三阈值作为基准的制动开始操作和制动结束操作。此外，在执行该层跳转操作之前，层跳转装置根据偏移电压的值改变该第二阈值或该第三阈值。

4. 发明申请

US20080266700A1 Disc Apparatus 失效
标题翻译：光盘装置
公开(公告)号：US20080266700A1
公开(公告)日：2008-10-30
申请号：US12108817
申请日：2008-04-24
申请人： Kazuki KAJIKAWA , Futoshi Takeda , Toshiaki Fukui , Kazuhiro Ichikawa , Kazuto Kitagawa
发明人： Kazuki KAJIKAWA , Futoshi Takeda , Toshiaki Fukui , Kazuhiro Ichikawa , Kazuto Kitagawa
IPC分类号： G11B15/18
CPC分类号： G11B33/121
摘要： A disc apparatus which can judge accurately whether or not a spindle motor is at fault due to a short circuit is provided.A disc apparatus (1) includes a spindle motor (3) which rotates a disc (2), a differential operational amplifier (5) which successively detects output voltages of the spindle motor (3), and a failure judgment unit (10) which calculates an average voltage of the plural output voltages and judges whether or not the spindle motor (3) is at fault in accordance with the average voltage and the output voltages. When counting number of occurrences of a specific state which indicates that one of the two output voltages detected successively is larger than the average voltage and other of the two output voltages is smaller than the average voltage, the failure judgment unit (10) judges that the spindle motor (3) is at fault. Consequently, the failure judgment unit (10) can rapidly and accurately judge the failure in the spindle motor (3) without the influence from the unexpected change of the output voltages.
摘要翻译：提供一种能够准确判断主轴电动机是否由于短路而发生故障的盘装置。盘装置（1）包括：旋转盘（2）的主轴马达（3），连续地检测主轴马达（3）的输出电压的差分运算放大器（5）;以及故障判断单元计算多个输出电压的平均电压，并根据平均电压和输出电压判断主轴电动机（3）是否有故障。当计算指示连续检测到的两个输出电压中的一个大于平均电压并且两个输出电压中的另一个小于平均电压的特定状态的发生次数时，故障判断单元（10）判断为主轴电机（3）故障。因此，故障判断单元10能够不受输出电压的意外变化的影响而快速，准确地判断主轴电动机3的故障。

5. 发明申请

US20080164833A1 Disc Apparatus 有权
标题翻译：光盘装置
公开(公告)号：US20080164833A1
公开(公告)日：2008-07-10
申请号：US11969567
申请日：2008-01-04
申请人： Kazuki Kajikawa
发明人： Kazuki Kajikawa
IPC分类号： G05B23/02
CPC分类号： H02P29/0241 , G01R31/343
摘要： A disc apparatus which can accurately judge whether or not a spindle motor is at fault due to a short circuit is provided.A disc apparatus (1) includes a spindle motor (3) which rotates a disc (2), a differential operational amplifier (5) which detects a difference between voltages of a positive terminal and a negative terminal of the spindle motor (3) as a detecting voltage level, a failure judgment unit (10) which judges whether or not the spindle motor (3) is at fault based on the detecting voltage level, and a disc determination means (12) which determines a type of the disc (2). The failure judgment unit (10) judges that the spindle motor (3) is at fault when the detecting voltage level becomes lower than a predetermined threshold level five times continuously during a start-up that the spindle motor (3) starts driving when the disc (2) is in stopped state while the disc determination means (12) determines the type of the disc (2). Consequently, the failure judgment unit (10) can accurately judge the failure in the spindle motor (3) without extending the start-up time.
摘要翻译：提供一种能够准确地判断主轴电动机是否因短路而发生故障的盘装置。盘装置（1）包括使盘（2）旋转的主轴马达（3），检测主轴马达（3）的正极端子和负极端子的电压差的差分运算放大器（5），一个检测电压电平，一个判断主轴电动机（3）是否基于检测电压电平处于故障的故障判断单元（10）以及一个确定盘的类型（2）的光盘确定装置（12））。当在主轴电动机（3）开始驱动的启动期间，当检测电压电平变得低于预定阈值电平五次时，故障判断单元（10）判断主轴电动机（3）是故障的，（2）在盘确定装置（12）确定盘（2）的类型时处于停止状态。因此，故障判断单元10能够在不延长起动时间的情况下，准确地判断主轴电动机3的故障。

6. 发明申请

US20080106815A1 DISK APPARATUS CAPABLE OF DETERMINING FAILURE OF SPINDLE MOTOR 有权
标题翻译：用于确定主轴故障故障的盘装置
公开(公告)号：US20080106815A1
公开(公告)日：2008-05-08
申请号：US11935505
申请日：2007-11-06
申请人： Kazuki Kajikawa
发明人： Kazuki Kajikawa
IPC分类号： G11B5/012 , G11B5/00
CPC分类号： G11B19/048
摘要： A control portion instructs supply of an offset voltage while a disk remains stopped at the time of start. While the disk remains stopped at the time of start, a differential operational amplifier detects a voltage difference between a first voltage supply line and a second voltage supply line. When the absolute value of the voltage difference output by the differential operational amplifier is equal to or lower than a prescribed threshold value, a failure determination portion determines that a spindle motor has shorted out.
摘要翻译：控制部分指示在启动时盘保持停止时提供偏移电压。当启动时盘停止，差分运算放大器检测第一电压供应线和第二电压供应线之间的电压差。当由差分运算放大器输出的电压差的绝对值等于或低于规定的阈值时，故障确定部分确定主轴电动机已经短路。

7. 发明授权

US08125861B2 Optical disk device 有权
标题翻译：光盘装置
公开(公告)号：US08125861B2
公开(公告)日：2012-02-28
申请号：US12560782
申请日：2009-09-16
申请人： Kazuki Kajikawa , Toshiaki Fukui
发明人： Kazuki Kajikawa , Toshiaki Fukui
IPC分类号： G11B7/00
CPC分类号： G11B7/08511 , G11B7/094 , G11B7/0945 , G11B2007/0013
摘要： This optical disk device includes a pickup, an offset means, a focus servo means, and a layer jump means. The offset means generates a focus error signal on the basis of the output of the pickup, and applies an offset voltage to that focus error signal. And the layer jump means performs layer jump operation, including kick start operation, kick end operation taking a second threshold value as a reference, brake start operation taking a third threshold value as a reference, and brake end operation. Moreover, before executing this layer jump operation, the layer jump means changes this second threshold value or this third threshold value, according to the value of the offset voltage.
摘要翻译：该光盘装置包括拾取器，偏移装置，聚焦伺服装置和层跳转装置。偏移装置根据拾取器的输出产生聚焦误差信号，并向该聚焦误差信号施加偏移电压。并且层跳转装置执行层跳转操作，包括起动开始操作，以第二阈值作为基准的脚蹬结束操作，以第三阈值作为基准的制动开始操作和制动结束操作。此外，在执行该层跳转操作之前，层跳转装置根据偏移电压的值改变该第二阈值或该第三阈值。

8. 发明授权

US07928681B2 Disk apparatus capable of determining failure of spindle motor 有权
标题翻译：能够确定主轴电机故障的盘装置
公开(公告)号：US07928681B2
公开(公告)日：2011-04-19
申请号：US11935505
申请日：2007-11-06
申请人： Kazuki Kajikawa
发明人： Kazuki Kajikawa
IPC分类号： G05B23/02
CPC分类号： G11B19/048
摘要： A control portion instructs supply of an offset voltage while a disk remains stopped at the time of start. While the disk remains stopped at the time of start, a differential operational amplifier detects a voltage difference between a first voltage supply line and a second voltage supply line. When the absolute value of the voltage difference output by the differential operational amplifier is equal to or lower than a prescribed threshold value, a failure determination portion determines that a spindle motor has shorted out.
摘要翻译：控制部分指示在启动时盘保持停止时提供偏移电压。当启动时盘停止，差分运算放大器检测第一电压供应线和第二电压供应线之间的电压差。当由差分运算放大器输出的电压差的绝对值等于或低于规定的阈值时，故障确定部分确定主轴电动机已经短路。

9. 发明申请

US20100074086A1 OPTICAL DISK DEVICE 审中-公开
标题翻译：光盘设备
公开(公告)号：US20100074086A1
公开(公告)日：2010-03-25
申请号：US12560830
申请日：2009-09-16
申请人： Kazuki Kajikawa , Toshiaki Fukui
发明人： Kazuki Kajikawa , Toshiaki Fukui
IPC分类号： G11B7/00
CPC分类号： G11B7/0037 , G11B7/126
摘要： This optical disk device includes a pickup, a replay means, and an adjustment means. The pickup irradiates laser light upon an optical disk. And the pickup receives light reflected back from the optical disk, performs photoelectric conversion thereupon, and outputs an electrical signal. The replay means adds an offset voltage to an RF signal generated from the electrical signal, and performs replay by processing the RF signal. The adjustment means measures the error rate of the RF signal while changing the value of the offset voltage. And the adjustment means adjusts the offset voltage to that voltage at which the error rate is the lowest. During replay, the replay means adds to the RF signal this offset voltage which has been thus adjusted.
摘要翻译：该光盘装置包括拾取器，重放装置和调节装置。拾取器将激光照射到光盘上。并且拾取器接收从光盘反射回来的光，在其上执行光电转换，并输出电信号。该重放装置为从电信号产生的RF信号增加一个偏置电压，并通过处理该RF信号进行重放。调整装置在改变偏移电压的值的同时测量RF信号的误码率。并且调整装置将偏移电压调整到误差率最低的电压。在重放期间，重放装置将RF信号增加了已经被调整的偏移电压。

10. 发明授权

US08441901B2 Optical disc apparatus 有权
标题翻译：光盘装置
公开(公告)号：US08441901B2
公开(公告)日：2013-05-14
申请号：US13461939
申请日：2012-05-02
申请人： Kazuki Kajikawa
发明人： Kazuki Kajikawa
IPC分类号： G11B7/00
CPC分类号： G11B7/0946 , G11B7/0948
摘要： An optical disc apparatus includes an optical pickup, a signal generation section which generates a total reflection signal and a focus error signal, and a servo control section which controls optical pickup. The optical disc apparatus further includes a main control section which binarizes the track cross signal by using a predetermined threshold value and, by using the binarized track cross signal, checks the tracing state of a track. The main control section controls the servo control section to check, by tracing one turn of the track of an optical disc, whether or not a tracking servo deviation occurs. When a tracking servo deviation occurs during the tracing, the main control section controls the servo control section to make the check once again. When, in the check made once again, a tracking servo deviation is found to occur again, the main control section increases the threshold value used in binarization.
摘要翻译：光盘装置包括光拾取器，产生全反射信号和聚焦误差信号的信号产生部分以及控制光学拾取器的伺服控制部分。该光盘装置还包括主控制部分，其通过使用预定的阈值对轨道交叉信号进行二值化，并且通过使用二进制的轨道交叉信号来检查轨道的跟踪状态。主控制部通过跟踪光盘的轨道的一圈来控制伺服控制部来检查跟踪伺服偏差是否发生。在跟踪期间发生跟踪伺服偏差时，主控制部分控制伺服控制部分重新进行检查。当再次检查时，再次发现跟踪伺服偏差，主控制部分增加二值化中使用的阈值。

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