Height-variable type turntable assembly and optical disk...

Details Height-variable type turntable assembly and optical disk... Height-variable type turntable assembly and optical disk...

2008-07-08

2008-07-08

Wellington, Andrea (Department: 2627)

Dynamic optical information storage or retrieval

Dynamic mechanism optical subsystem

Optical storage medium support

C720S605000, C720S667000, C720S691000, C720S695000, C720S696000

Reexamination Certificate

active

07398539

ABSTRACT:
The present invention relates generally to a turntable assembly for optical disks and, more particularly, to a height-variable type turntable assembly, which can adjust the height of a turntable to adjust the working distance between an object lens and an optical disk according to the type of optical disk placed on the turntable, and an optical disk device including the same. The height-variable type turntable assembly includes a turntable, a spindle motor for rotating the turntable, and a height adjustment device for supporting the spindle motor and driving the spindle motor in a vertical direction. Through such a structure, the working distance between the optical disk and the optical pick-up can be adjusted to correspond to at least three types of optical disks (e.g., CD, DVD and BD) while the DC sensitivity and tilt characteristics of the actuator of the optical pick-up is not considerably affected.

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