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公开(公告)号：EP0853313A3
公开(公告)日：2007-01-03
申请号：EP98200192.7
申请日：1996-01-18
发明人： Crupper, Randolph Scott , Grassens, Leonardus Johannes , Davis, Marvin Benjamin , Lewis, David Earl , Getreuer, Kurt, Walter , Schell, David Louis
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
摘要： An optical disc system includes a laser driver for controlling an electrical current directed to a laser. The driver includes means for switching the drive voltage between a first voltage level and a second voltage level, so that electric power is only consumed when the laser is energized, thereby achieving enhanced rise and fall switching characteristics. The means for applying the drive voltage may include a CMOS buffer output.
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2.发明公开Optical disc system including focus capture assembly with focus error signal circuit and method for operating same 失效与聚焦误差电路提供聚焦搜索装置全面用于光盘用于其操作的系统，方法和
公开(公告)号：EP0829859A3
公开(公告)日：1999-04-28
申请号：EP97118097.1
申请日：1996-01-18
发明人： Crupper, Randolph Scott , Davis, Marvin Benjamin , Getreuer, Kurt Walter , Grassens, Leonardus Johannes , Lewis, David Earl , Schell, David Louis
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
摘要： The optical drive system described comprises an optical assembly, a light source, an objective lens disposed in an objective lens subassembly, an actuator assembly which suspends the objective lens subassembly for relative motion thereof with respect to the actuator assembly, first and second servomotors for moving the objective lens subassembly in tracking and focusing directions, respectively, relative to the actuator assembly, a third servomotor for moving the actuator assembly in the tracking direction relative to a medium, first electronic means for controlling the first, second and third servomotors, a motor with a hub assembly for moving the medium relative to the objective lens subassembly, a photo detector, second electronic means responsive to an output signal of the photo detector for decoding information carried in the light returning from the medium, third electronic means for enabling the light source to emit light at a first intensity level to encode information on the medium and at a second intensity level to read information encoded thereon, data receiving means for accepting data that is storable on the medium, data encoding means being responsive to the data receiving means for representing the data to be stored in a predetermined format, the data encoding means also for directing data to the third electronic means, a magnetic field generator for producing a magnetic field on a portion of the medium and for coacting with the third electronic means and the light source to write and erase information on the medium, a cartridge loading assembly, servo error detecting means coupled to the first electronic means, and a housing structure for positioning components of the optical drive system with respect to another. Most of the systems claimed include means to monitor and use a Quad Sum signal associated with the return light for focus capture.
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3.发明公开Focus capture method for optical disc system using detection of Quad Sum signal 失效与检测用的Quad Sum信号的光盘系统的焦点搜索方法
公开(公告)号：EP0829860A3
公开(公告)日：1999-04-14
申请号：EP97118098.9
申请日：1996-01-18
发明人： Crupper, Randolph Scott , Davis, Marvin Benjamin , Getreuer, Kurt Walter , Grassens, Leonardus Johannes , Lewis, David Earl , Schell, David Louis
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
摘要： The optical drive system described comprises an optical assembly, a light source, an objective lens disposed in an objective lens subassembly, an actuator assembly which suspends the objective lens subassembly for relative motion thereof with respect to the actuator assembly, first and second servomotors for moving the objective lens subassembly in tracking and focusing directions, respectively, relative to the actuator assembly, a third servomotor for moving the actuator assembly in the tracking direction relative to a medium, first electronic means for controlling the first, second and third servomotors, a motor with a hub assembly for moving the medium relative to the objective lens subassembly, a photo detector for decoding information carried in the light returning from the medium, third electronic means for enabling the light source to emit light at a first intensity level to encode information on the medium and at a second intensity level to read information encoded thereon, data receiving means for accepting data that is storable on the medium, data encoding means being responsive to the data receiving means for representing the data to be stored in a predetermined format, the data encoding means also for directing data to the third electronic means, a magnetic field generator for producing a magnetic field on a portion of the medium and for coacting with the third electronic means and the light source to write and erase information on the medium, a cartridge loading assembly, servo error detecting means coupled to the first electronic means, and a housing structure for positioning components of the optical drive system with respect to one another. Most of the systems claimed include means to monitor and use a Quad Sum signal associated with the return light for focus capture.
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4.发明公开Optical disc system including focus capture assembly with focus error signal circuit and method for operating same 失效与聚焦误差电路提供聚焦搜索装置全面用于光盘用于其操作的系统，方法和
公开(公告)号：EP0829859A2
公开(公告)日：1998-03-18
申请号：EP97118097.1
申请日：1996-01-18
发明人： Crupper, Randolph Scott , Davis, Marvin Benjamin , Getreuer, Kurt Walter , Grassens, Leonardus Johannes , Lewis, David Earl , Schell, David Louis
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
摘要： The optical drive system described comprises an optical assembly, a light source, an objective lens disposed in an objective lens subassembly, an actuator assembly which suspends the objective lens subassembly for relative motion thereof with respect to the actuator assembly, first and second servomotors for moving the objective lens subassembly in tracking and focusing directions, respectively, relative to the actuator assembly, a third servomotor for moving the actuator assembly in the tracking direction relative to a medium, first electronic means for controlling the first, second and third servomotors, a motor with a hub assembly for moving the medium relative to the objective lens subassembly, a photo detector, second electronic means responsive to an output signal of the photo detector for decoding information carried in the light returning from the medium, third electronic means for enabling the light source to emit light at a first intensity level to encode information on the medium and at a second intensity level to read information encoded thereon, data receiving means for accepting data that is storable on the medium, data encoding means being responsive to the data receiving means for representing the data to be stored in a predetermined format, the data encoding means also for directing data to the third electronic means, a magnetic field generator for producing a magnetic field on a portion of the medium and for coacting with the third electronic means and the light source to write and erase information on the medium, a cartridge loading assembly, servo error detecting means coupled to the first electronic means, and a housing structure for positioning components of the optical drive system with respect to another.
Most of the systems claimed include means to monitor and use a Quad Sum signal associated with the return light for focus capture.-
5.发明公开Optical disc system having improved circuitry for performing blank sector check on readable disc and method for operating same 失效光盘系统具有改进的开关电路为可读光盘上的空扇区控制，和方法用于其操作
公开(公告)号：EP0840300A3
公开(公告)日：1999-04-28
申请号：EP97118095.5
申请日：1996-01-18
发明人： Crupper, Randolph Scott , Davis, Marvin Benjamin , Getreuer, Kurt Walter , Grassens, Leonardus Johannes , Lewis, David Earl , Schell, David Louis
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
摘要： An optical disc system including a focusing mechanism and a tracking mechanism, wherein the mechanisms are controlled by feedback loops having electronic circuits for generating a servo error signals. The error signals are communicated in the feedback loop for effecting corrections of the focusing mechanism and the tracking mechanism. The optical disc system is provided with digital lead/lag compensation circuit assembly including a servo loop having servo loop transfer function and an error signal. The circuit assembly includes a motor or actuator having a mechanical resonance frequency being less than a predetermined sampling frequency and a compensation circuit for stabilizing the servo loop. The error signal of the servo loop is sampled at the pre-determined sampling frequency. Normalization of the error signals to the information signal occurs during sampling. The compensation circuit has a compensation transfer function including a single lead and a complex lag for producing a notch filter with a notch. The compensation transfer function is formulated so that the notch occurs at approximately one half the predetermined sampling frequency thereby reducing amplitude of the mechanical resonance frequency in the servo loop transfer function. The optical disc system also includes a mechanical isolator for vibration isolation and accommodation of thermal expansion, an oscillator with a tank circuit having an increased resistance, an improved focus capture system, and means for identifying blank sectors in a storage medium.
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6.发明公开Optical disc system having servo motor and servo error detection assembly operated relative to monitored Quad Sum signal 失效光盘系统具有伺服电机和使用Quad Sum信号的伺服误差检测装置监视
公开(公告)号：EP0829858A3
公开(公告)日：1999-04-14
申请号：EP97118093.0
申请日：1996-01-18
发明人： Crupper, Randolph Scott , Davis, Marvin Benjamin , Getreuer, Kurt Walter , Grassens, Leonardus Johannes , Lewis, David Earl , Schell, David Louis
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
摘要： The optical drive system described comprises an optical assembly, a light source, an objective lens disposed in an objective lens subassembly, an actuator assembly which suspends the objective lens subassembly for relative motion thereof with respect to the actuator assembly, first and second servomotors for moving the objective lens subassembly in tracking and focusing directions, respectively, relative to the actuator assembly, a third servomotor for moving the actuator assembly in the tracking direction relative to a medium, first electronic means for controlling the first, second and third servomotors, a motor with a hub assembly for moving the medium relative to the objective lens subassembly, a photo detector, second electronic means responsive to an output signal of the photo detector for decoding information carried in the light returning from the medium, third electronic means for enabling the light source to emit light at a first intensity level to encode information on the medium and at a second intensity level to read information encoded thereon, data receiving means for accepting data that is storable on the medium, data encoding means being responsive to the data receiving means for representing the data to be stored in a predetermined format, the data encoding means also for directing data to the third electronic means, a magnetic field generator for producing a magnetic field on a portion of the medium and for coacting with the third electronic means and the light source to write and erase information on the medium, a cartridge leading assembly, servo error detecting means coupled to the first electronic means, and a housing structure for positioning components of the optical drive system with respect to one another. Most of the systems claimed include means to monitor and use a Quad Sum signal associated with the return light for focus capture.
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公开(公告)号：EP0853313A2
公开(公告)日：1998-07-15
申请号：EP98200192.7
申请日：1996-01-18
发明人： Crupper, Randolph Scott , Grassens, Leonardus Johannes , Davis, Marvin Benjamin , Lewis, David Earl , Getreuer, Kurt, Walter , Schell, David Louis
IPC分类号： G11B7/125
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
摘要： An optical disc system includes a laser driver for controlling an electrical current directed to a laser. The driver includes means for switching the drive voltage between a first voltage level and a second voltage level, so that electric power is only consumed when the laser is energized, thereby achieving enhanced rise and fall switching characteristics. The means for applying the drive voltage may include a CMOS buffer output.
摘要翻译： 光盘系统包括用于控制指向激光器的电流的激光驱动器。 驱动器包括用于在第一电压电平和第二电压电平之间切换驱动电压的装置，使得仅当激光器通电时才消耗电力，从而实现增强的上升和下降转换特性。 用于施加驱动电压的装置可以包括CMOS缓冲器输出。
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8.发明公开Method of changing rotational rate of storage medium from initial rate to desired rate 失效一种用于从初始速度把存储介质的旋转速度到期望速度的方法
公开(公告)号：EP0852379A2
公开(公告)日：1998-07-08
申请号：EP98101056.4
申请日：1996-01-18
发明人： Crupper, Randolph Scott , Davis, Marvin Benjamin , Getreuer, Kurt Walter , Grassens, Leonardus Johannes , Lewis, David Earl , Schell, Davis Lewis
IPC分类号： G11B19/26
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
摘要： A method is described of changing the rotational rate of a storage medium from an initial rotation rate to a desired rotational rate having an intermediate limit, a lower acceptable limit and an upper acceptable limit. The method involves the steps of applying a force to the storage medium, generating a first signal when the rotation rate exceeds the intermediate limit, and generating a second signal when the rotational rate exceeds the lower acceptable limit. The application of the force is then terminated. The upper and lower acceptable limits define the operational range for the spindle speed, and may be on the order of 1% apart.
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9.发明公开Analog to digital converter and assembly to normalize servo error signals and multiplex reference voltage inputs and digital outputs and optical drive system including same 失效模拟数字转换器以及用于归一伺服误差信号和多路复用参考电压输入和数字输出，以及光盘驱动器系统，使
公开(公告)号：EP0838811A2
公开(公告)日：1998-04-29
申请号：EP97118094.8
申请日：1996-01-18
发明人： Crupper, Randolph Scott , Davis, Marvin Benjamin , Getreuer, Kurt Walter , Grassens, Leonardus Johannes , Lewis, David Earl , Schell, David Louis
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
摘要： An optical disc system including a focusing mechanism and a tracking mechanism, wherein the mechanisms are controlled by servo error and control assembly having at least one servomoto and an analog to digital convertor (U11). The analog to digital convertor has a reference voltage input (REF+,REF-). The reference voltage input is supplied by a quad sum signal from a photodetector, and is used to normalize the focus and tracking error signals (FE,TE) for input into the servo loop. The optical disc system mayalso include an improved focus capture system.
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10.发明授权Optical disc system having current monitoring circuit with controller for laser driver and method for operating same 失效光盘系统具有电流监测电路的激光驱动器控制单元，以及方法用于其操作
公开(公告)号：EP0840309B1
公开(公告)日：2003-11-19
申请号：EP97118099.7
申请日：1996-01-18
发明人： Crupper, Randolph Scott , Davis, Marvin Benjamin , Getreuer, Kurt Walter , Grassens, Leonardus Johannes , Lewis, David Earl , Schell, David Louis
CPC分类号： G11B17/043 , G11B5/5526 , G11B7/0037 , G11B7/004 , G11B7/00456 , G11B7/00745 , G11B7/08511 , G11B7/08529 , G11B7/08582 , G11B7/09 , G11B7/0901 , G11B7/0908 , G11B7/0917 , G11B7/093 , G11B7/0932 , G11B7/0933 , G11B7/0935 , G11B7/0941 , G11B7/0943 , G11B7/0945 , G11B7/126 , G11B7/1356 , G11B11/10504 , G11B11/10534 , G11B11/1055 , G11B11/10563 , G11B11/10576 , G11B11/10595 , G11B17/0438 , G11B20/10009 , G11B20/10037 , G11B20/10222 , G11B20/1258 , G11B20/14 , G11B21/10 , G11B21/106 , G11B2007/0919 , G11B2020/10916 , G11B2020/1281 , G11B2020/1484 , H02K41/0354 , H02K41/0356
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