公开(公告)号：US08203919B2

公开(公告)日：2012-06-19

申请号：US12971936

申请日：2010-12-17

申请人： Shinsuke Izawa ,  Manabu Shiozawa

发明人： Shinsuke Izawa ,  Manabu Shiozawa

IPC分类号： G11B7/00

CPC分类号： G11B7/08511 ,  G11B2007/0013

摘要： The invention provides an optical disc apparatus which prevents that a laser beam whose power is set at a read power level causes erroneous data recording or deletion. The optical disc apparatus includes an emission controller which controls an amount of an electrical current that a current supply portion supplies to a laser diode in order to control a level of emission power at which the laser diode emits the laser beam. The emission controller has a function to set levels of the emission power at the following transition processings: a transition processing after a read processing and before a write processing, a transition processing after a write processing and before a read processing, a transition processing between two read processings for respective areas, and a transition processing between two write processings for respective areas.

摘要翻译： 本发明提供一种光盘装置，其防止功率设定在读取功率电平的激光束导致错误的数据记录或删除。 光盘装置包括发射控制器，其控制电流供应部分向激光二极管提供的电流量，以便控制激光二极管发射激光束的发射功率的水平。 发射控制器具有在以下转换处理中设置发射功率电平的功能：在读取处理之后和写入处理之前的转换处理，写入处理之后和读取处理之前的转换处理，两个 对各个区域的读取处理以及针对各个区域的两个写入处理之间的转换处理。