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1. 发明申请

US20070230524A1 LASER POWER CONTROL UNIT AND METHOD FOR PERFORMING AUTO POWER CONTROL 有权
标题翻译：激光功率控制单元和执行自动功率控制的方法
公开(公告)号：US20070230524A1
公开(公告)日：2007-10-04
申请号：US11759947
申请日：2007-06-08
申请人： Yung-Chih LI , Hsueh-Kun LIAO , Ching-Chuan Hsu
发明人： Yung-Chih LI , Hsueh-Kun LIAO , Ching-Chuan Hsu
IPC分类号： H01S3/00
CPC分类号： H01S5/0683 , G11B7/1263 , H01S5/042
摘要： A laser power control unit used for controlling the laser power of an optical pick-up unit (OPU) is provided. The laser power control unit includes: at least one analog-to-digital converter (ADC) electrically coupled to the OPU for transferring a front photodiode output signal into a digital feedback signal; and at least one digital control circuit electrically coupled to the ADC for generating a power control signal and outputting the power control signal to the OPU in order to control the laser power of the OPU. The digital control circuit has a compensation circuit used for generating a compensation value according to a difference between the digital feedback signal and a digital target feedback signal so as to adjust the power control signal. The front photodiode output signal corresponds to the laser power of the OPU.
摘要翻译：提供了用于控制光学拾取单元（OPU）的激光功率的激光功率控制单元。激光功率控制单元包括：电耦合到OPU的至少一个模数转换器（ADC），用于将前光电二极管输出信号转换成数字反馈信号; 以及电耦合到ADC的至少一个数字控制电路，用于产生功率控制信号，并将功率控制信号输出到OPU以便控制OPU的激光功率。数字控制电路具有补偿电路，用于根据数字反馈信号和数字目标反馈信号之间的差产生补偿值，以便调整功率控制信号。前光电二极管输出信号对应于OPU的激光功率。

2. 发明申请

US20080205229A1 METHOD OF IDENTIFYING OPTICAL DISC 审中-公开
标题翻译：识别光盘的方法
公开(公告)号：US20080205229A1
公开(公告)日：2008-08-28
申请号：US11678625
申请日：2007-02-26
申请人： Yung-Chih LI , Cheng-Chi Huang
发明人： Yung-Chih LI , Cheng-Chi Huang
IPC分类号： G11B7/007
CPC分类号： G11B19/127 , G11B7/1275 , G11B2007/0006 , G11B2007/0013
摘要： A method of identifying an optical disc is disclosed. The method includes enabling an optical pick-up unit to emit a first laser beam having a first wavelength to the optical disc; controlling the optical pick-up unit to move a focus point of the first laser beam in a direction of thickness of the optical disc; obtaining a first focus error (FE) signal corresponding to the first laser beam; counting a first s-curve number corresponding to s-curve occurring in the first FE signal; and identifying the optical disc according to the first s-curve number.
摘要翻译：公开了一种识别光盘的方法。该方法包括使光学拾取单元能够将具有第一波长的第一激光束发射到光盘; 控制所述光学拾取单元沿所述光盘的厚度方向移动所述第一激光束的焦点; 获得对应于第一激光束的第一聚焦误差（FE）信号; 计数对应于在第一FE信号中出现的s曲线的第一s曲线数; 以及根据第一s曲线号识别光盘。

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