Dual mode auto-balancer for DVD drives

Details Dual mode auto-balancer for DVD drives Dual mode auto-balancer for DVD drives

1998-03-25

2000-05-09

Ometz, David L.

Dynamic information storage or retrieval

Dynamic mechanism subsystem

Specific detail of storage medium support or motion production

360 9908, G11B 1920

Patent

active

060613254

ABSTRACT:
A (DVD) drive unit for a variety of optical media including DVD discs or CD-ROM discs is capable of eliminating vibration while rotating and reading the optical media at either a constant linear velocity (CLV) or a constant angular velocity (CAV). In CAV mode, the drive unit uses ball bearings which are movable within a cavity in the turntable to counterbalance an unbalanced disc. In CLV mode, the drive unit utilizes a series of electromagnets to capture and symmetrically array the ball bearings within the cavity around the turntable.

REFERENCES:
patent: 4060009 (1977-11-01), Wyman
patent: 4075909 (1978-02-01), Deakin
patent: 4933927 (1990-06-01), Ross
patent: 5054016 (1991-10-01), J'Alayer et al.
patent: 5111713 (1992-05-01), Cameron et al.
patent: 5903540 (1999-05-01), Ro et al.

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