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    • 2. 发明申请
    • Optical disc controller
    • 光盘控制器
    • US20060209646A1
    • 2006-09-21
    • US10553616
    • 2004-04-16
    • Akira YoshikawaShin-ichi Yamada
    • Akira YoshikawaShin-ichi Yamada
    • G11B7/00
    • G11B7/08511G11B2007/0013
    • The present invention provides an optical disk control device that can perform focus pulling in a short time for a target information surface of an optical disk having a plurality of information surfaces. An objective lens (23) is moved toward an optical disk (1) having a plurality of information surfaces (1A, 1B) by the output signal of a driving signal generating circuit (42B), passage of an initial focused focal position is detected by a focal point passage detecting circuit (44), and when the objective lens moves past that position only a predetermined amount closer to the optical disk, an n-rotation delay circuit (70) outputs a reversal instruction f. After changing directions and moving the objective lens away from the optical disk, a focus pulling-in circuit (32B) switches a signal “a” that is output to an actuator driving circuit (21) from the output signal of the driving signal generating circuit to the output signal of the control circuit, activates a control circuit and performs focus pulling-in.
    • 本发明提供一种光盘控制装置,其可以在具有多个信息表面的光盘的目标信息表面上在短时间内执行聚焦拉动。 物镜(23)通过驱动信号发生电路(42B)的输出信号向具有多个信息表面(1A,1B)的光盘(1)移动,初始聚焦焦点位置 通过焦点通过检测电路(44)检测到,并且当物镜仅靠近光盘的预定量移动超过该位置时,n旋转延迟电路(70)输出反转指令f。 在改变方向并将物镜移动离开光盘之后,聚焦拉入电路(32B)从产生驱动信号的输出信号切换输出到致动器驱动电路(21)的信号“a” 电路连接到控制电路的输出信号,激活控制电路并进行聚焦拉入。