公开(公告)号：US20050002303A1

公开(公告)日：2005-01-06

申请号：US10751647

申请日：2004-01-06

申请人： Sung-du Kwon ,  Jun-hyuk Lee ,  Pyong-yong Seong ,  Hyun-cheal Bang ,  Jong-koog Lee ,  Yong-jun Cho

发明人： Sung-du Kwon ,  Jun-hyuk Lee ,  Pyong-yong Seong ,  Hyun-cheal Bang ,  Jong-koog Lee ,  Yong-jun Cho

IPC分类号： G11B7/00 ,  G11B7/125 ,  H01S5/06

CPC分类号： G11B7/1263

摘要： In order to improve the frequency characteristic of a laser power monitor device and the precision of laser power control when low-speed recording is performed, there is provided a laser power monitor device for an optical recording and/or reproducing apparatus, the laser power monitor device including a photo diode unit to receive part of a light emitted from a laser diode and output a current proportional to optical power, and a monitor circuit to receive the current output from the photo diode unit, convert the received current into a voltage, and outputs the voltage to an automatic laser power control circuit, and the photo diode unit includes a plurality of photo diodes connected to the monitor circuit to supply current to the monitor circuit. The laser power monitor device further includes a switch unit, wherein the switch unit is located between the photo diode unit and the monitor circuit to receive a signal on a current recording speed and switch so that the number of photo diodes supplying current to the monitor circuit is reduced as the recording speed is increased.

摘要翻译： 为了提高激光功率监视装置的频率特性和进行低速记录时的激光功率控制的精度，提供了一种用于光学记录和/或再现装置的激光功率监视装置，激光功率监视器 该装置包括：光电二极管单元，用于接收从激光二极管发射的一部分光并输出与​​光功率成比例的电流;以及监测电路，用于接收来自光电二极管单元的电流输出，将接收的电流转换成电压; 将电压输出到自动激光功率控制电路，并且光电二极管单元包括连接到监视器电路的多个光电二极管，以向监控电路提供电流。 所述激光功率监视装置还包括开关单元，其中所述开关单元位于所述光电二极管单元和所述监视器电路之间，以接收当前记录速度的信号并进行切换，使得向所述监视器电路提供电流的光电二极管的数量 随着记录速度的增加而减小。

公开(公告)号：US07272103B2

公开(公告)日：2007-09-18

申请号：US10751647

申请日：2004-01-06

申请人： Sung-du Kwon ,  Jun-hyuk Lee ,  Pyong-yong Seong ,  Hyun-cheal Bang ,  Jong-koog Lee ,  Yong-jun Cho

发明人： Sung-du Kwon ,  Jun-hyuk Lee ,  Pyong-yong Seong ,  Hyun-cheal Bang ,  Jong-koog Lee ,  Yong-jun Cho

IPC分类号： G11B7/00

CPC分类号： G11B7/1263

摘要： In order to improve the frequency characteristic of a laser power monitor device and the precision of laser power control when low-speed recording is performed, there is provided a laser power monitor device for an optical recording and/or reproducing apparatus, the laser power monitor device including a photo diode unit to receive part of a light emitted from a laser diode and output a current proportional to optical power, and a monitor circuit to receive the current output from the photo diode unit, convert the received current into a voltage, and outputs the voltage to an automatic laser power control circuit, and the photo diode unit includes a plurality of photo diodes connected to the monitor circuit to supply current to the monitor circuit. The laser power monitor device further includes a switch unit, wherein the switch unit is located between the photo diode unit and the monitor circuit to receive a signal on a current recording speed and switch so that the number of photo diodes supplying current to the monitor circuit is reduced as the recording speed is increased.

摘要翻译： 为了提高激光功率监视装置的频率特性和进行低速记录时的激光功率控制的精度，提供了一种用于光学记录和/或再现装置的激光功率监视装置，激光功率监视器 该装置包括：光电二极管单元，用于接收从激光二极管发射的一部分光并输出与​​光功率成比例的电流;以及监测电路，用于接收来自光电二极管单元的电流输出，将接收的电流转换成电压; 将电压输出到自动激光功率控制电路，并且光电二极管单元包括连接到监视器电路的多个光电二极管，以向监控电路提供电流。 所述激光功率监视装置还包括开关单元，其中所述开关单元位于所述光电二极管单元和所述监视器电路之间，以接收当前记录速度的信号并进行切换，使得向所述监视器电路提供电流的光电二极管的数量 随着记录速度的增加而减小。

公开(公告)号：US07248553B2

公开(公告)日：2007-07-24

申请号：US10705240

申请日：2003-11-12

申请人： Sung-du Kwon ,  Jun-hyuk Lee ,  Yong-jun Cho ,  Jung-koog Lee ,  Hyun-cheal Bang

发明人： Sung-du Kwon ,  Jun-hyuk Lee ,  Yong-jun Cho ,  Jung-koog Lee ,  Hyun-cheal Bang

IPC分类号： G11B7/00

CPC分类号： G11B7/00456 ,  G11B7/126

摘要： A laser power control device for use in an optical recording and/or reproducing apparatus that records data on and/or reproduces data from an optical recording medium by driving a laser diode with a laser diode driver. The device includes: a peak power monitor which monitors a peak power by a sample-and-hold operation, the peak power being output by the laser diode when pits are formed in the optical recording medium; an elimination power monitor which monitors an elimination power by the sample-and-hold operation, the elimination power being output by the laser diode when a space between pits of the optical recording medium is formed; a peak power setter which sets a peak power in the laser diode driver based on a monitoring result of the peak power monitor; an elimination power setter which sets an elimination power in the laser diode driver based on a monitoring result of the elimination power monitor; and a bias power setter which sets a bias power in the laser diode driver based on the monitoring results of the peak power monitor and the elimination power monitor.

摘要翻译： 一种用于光学记录和/或再现装置的激光功率控制装置，其通过用激光二极管驱动器驱动激光二极管从光记录介质记录数据和/或再现数据。 该装置包括：峰值功率监视器，其通过采样保持操作监视峰值功率，当在光学记录介质中形成凹坑时，由激光二极管输出的峰值功率; 消除功率监视器，其通过采样保持操作来监视消除功率，当形成光记录介质的凹坑之间的空间时，消除功率由激光二极管输出; 峰值功率设定器，其基于峰值功率监视器的监视结果来设定激光二极管驱动器的峰值功率; 消除功率设定器，其基于消除功率监视器的监视结果来设定激光二极管驱动器中的消除功率; 以及偏置功率设定器，其基于峰值功率监视器和消除功率监视器的监视结果来设定激光二极管驱动器中的偏置功率。

公开(公告)号：US07372796B2

公开(公告)日：2008-05-13

申请号：US10687994

申请日：2003-10-20

申请人： Jun-hyuk Lee ,  Chui-ho Jeon ,  Dong-ryul Lee ,  Sung-du Kwon

发明人： Jun-hyuk Lee ,  Chui-ho Jeon ,  Dong-ryul Lee ,  Sung-du Kwon

IPC分类号： G11B5/09

CPC分类号： G11B7/1263 ,  G11B7/00456

摘要： An apparatus for controlling a monitor photo diode (PD) of an optical pickup system monitors an optical power signal output for writing data on or reading data from a disk. The apparatus includes a comparator which compares a voltage signal corresponding to the optical power signal output from the LD with a predetermined reference voltage signal, and a gain selector which selectively issues a gain output from the comparator depending on the type of the optical power signal output from the LD.

摘要翻译： 用于控制光学拾取系统的监视光电二极管（PD）的装置监视用于在盘上写入数据或从盘读取数据的光功率信号输出。 该装置包括：比较器，其将与LD输出的光功率信号相对应的电压信号与预定参考电压信号进行比较;以及增益选择器，其根据光功率信号输出的类型选择性地从比较器发出增益输出 从LD。