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    • 3. 发明申请
    • OPTICAL HEAD AND OPTICAL DISC DRIVE
    • 光头和光盘驱动
    • US20080080358A1
    • 2008-04-03
    • US11668086
    • 2007-01-29
    • Manabu OCHIFumihito IchikawaHiroyasu YoshidaMitsuo Satake
    • Manabu OCHIFumihito IchikawaHiroyasu YoshidaMitsuo Satake
    • G11B7/00
    • G11B7/126G11B7/127
    • The present invention provides an optical head for realizing the stable operation by controlling the temperature of the semiconductor laser to a low level by reducing the heat transfer rate from a laser driver IC to a housing in the vicinity of a semiconductor laser, and an optical disc drive using the same. It provides an optical head having a semiconductor laser and a photo detector arranged on one side with respect to a straight line through the center of an object lens of an object lens actuator and in parallel to the axis contacted with bearings, and a laser driver IC arranged on the other side with respect to the straight line. Thereby, the distance from the laser driver IC to the semiconductor laser can sufficiently be ensured so that the heat transfer rate from the laser driver IC to the housing can be reduced.
    • 本发明提供一种光头,用于通过将半导体激光器附近的激光驱动IC向外壳的传热速度降低,将半导体激光器的温度控制在低水平,实现稳定的动作, 驱动器使用相同。 它提供了一种具有半导体激光器和光电检测器的光学头,其相对于通过物镜致动器的物镜的中心并且与轴承接​​触的轴线相对于直线布置在一侧,激光驱动器IC 相对于直线布置在另一侧。 由此,能够充分确保从激光驱动IC到半导体激光器的距离,能够降低从激光驱动IC到壳体的传热速度。
    • 4. 发明授权
    • Optical head and optical disc drive
    • 光头和光盘驱动器
    • US07830755B2
    • 2010-11-09
    • US11668086
    • 2007-01-29
    • Manabu OchiFumihito IchikawaHiroyasu YoshidaMitsuo Satake
    • Manabu OchiFumihito IchikawaHiroyasu YoshidaMitsuo Satake
    • G11B7/00
    • G11B7/126G11B7/127
    • The present invention provides an optical head for realizing the stable operation by controlling the temperature of the semiconductor laser to a low level by reducing the heat transfer rate from a laser driver IC to a housing in the vicinity of a semiconductor laser, and an optical disc drive using the same. It provides an optical head having a semiconductor laser and a photo detector arranged on one side with respect to a straight line through the center of an object lens of an object lens actuator and in parallel to the axis contacted with bearings, and a laser driver IC arranged on the other side with respect to the straight line. Thereby, the distance from the laser driver IC to the semiconductor laser can sufficiently be ensured so that the heat transfer rate from the laser driver IC to the housing can be reduced.
    • 本发明提供一种光头,用于通过将半导体激光器附近的激光驱动IC向外壳的传热速度降低,将半导体激光器的温度控制在低水平,实现稳定的动作, 驱动器使用相同。 它提供了一种具有半导体激光器和光电检测器的光学头,其相对于通过物镜致动器的物镜的中心并且与轴承接​​触的轴线相对于直线设置在一侧,激光驱动器IC 相对于直线布置在另一侧。 由此,能够充分确保从激光驱动IC到半导体激光器的距离,能够降低从激光驱动IC到壳体的传热速度。
    • 5. 发明授权
    • Objective lens driving device and optical disk unit
    • 物镜驱动装置和光盘单元
    • US06212140B1
    • 2001-04-03
    • US09391407
    • 1999-09-08
    • Katsuhiko KimuraSeiichi KatoHiroshi SaitoHiroyasu YoshidaFumihito IchikawaSatoshi Shinada
    • Katsuhiko KimuraSeiichi KatoHiroshi SaitoHiroyasu YoshidaFumihito IchikawaSatoshi Shinada
    • G11B700
    • G11B7/093
    • In a background-art optical disk drive, it is necessary to improve acceleration generated in an objective lens driving device in order to make an objective lens track a disk rotating at a high speed. This can be achieved either by increasing a thrust force acting on a movable body including the objective lens or by making the movable body lighter in weight. One method for increasing the thrust force is to make permanent magnets larger or use permanent magnets having a large magnetic force. However, this leads to such a problem that the unit becomes larger in size or higher in cost. In order to solve the foregoing problem, an inner yoke is disposed around a beam of light and inside the movable body of the objective lens driving device. Alternatively, an inner yoke having at least two sides substantially parallel with the radial direction of the disk and at least two sides substantially perpendicular thereto is disposed inside the movable body.
    • 在背景技术的光盘驱动器中,需要改善在物镜驱动装置中产生的加速度,以便使物镜跟踪高速旋转的盘。 这可以通过增加作用在包括物镜的可移动体上的推力或通过使移动体重量更轻而实现。 增加推力的一种方法是使永磁体变大或使用具有大磁力的永久磁铁。 然而,这导致这样的问题,即单元的尺寸变大或成本更高。 为了解决上述问题,内磁轭围绕光束设置在物镜驱动装置的可移动体的内部。 或者,具有与盘的径向大致平行的至少两个侧面的内轭和与其大体垂直的至少两个侧面设置在可动体的内部。