专利检索 ap:("Pioneer Corporation") AND inv:"Yoshioka, Minoru, Pioneer Corporation" 第 1 页

1.

发明公开
Bias voltage controlling apparatus, information reproducing apparatus and information recording apparatus 有权
标题翻译： Vorspannungssteuergerät，信息再现装置和信息记录装置

公开(公告)号：EP1091356A3

公开(公告)日：2002-11-20

申请号：EP00121305.7

申请日：2000-10-06

申请人： Pioneer Corporation

发明人： Abe, Shinichiro, Pioneer Corporation , Iijima, Takayuki, Pioneer Corporation , Yoshioka, Minoru, Pioneer Corporation

IPC分类号： G11B19/12 , G11B7/09

CPC分类号： G11B19/12 , G11B7/0941 , G11B11/10576 , G11B11/10595

摘要： A bias voltage controlling apparatus controls a bias voltage for a focus servo control to control a position of a focal point of a light beam, which is irradiated onto an information record surface of an information record medium (120), in a direction perpendicular to the information record surface. The bias voltage controlling apparatus is provided with: a distinguishing device (110) for distinguishing a type of the information record medium; and a controlling device (108) for optimally controlling the bias voltage on the basis of the type of the information record medium distinguished by the distinguishing device.