Optical disc player with focus pull-in function

Details Optical disc player with focus pull-in function Optical disc player with focus pull-in function

2007-07-10

2007-07-10

Wellington, Andrea (Department: 2627)

Dynamic information storage or retrieval

With servo positioning of transducer assembly over track...

Optical servo system

C369S044270, C369S053230, C369S053280

Reexamination Certificate

active

10252008

ABSTRACT:
An optical disc player executes a focus pull-in operation while avoiding an inconvenience that an objective lens comes into contact with an optical disc, or the like. The objective lens is forcedly moved gradually from a position that is away from the surface of the optical disc and outside a capture range of a focus servo toward the surface of the optical disc. When the objective lens reaches the capture range of the focusing servo loop by the moving operation and a distance between the objective lens and the disc surface is at the minimum distance or is changing in a widening direction, the moving operation of the objective lens is stopped.

REFERENCES:
patent: 4541084 (1985-09-01), Oku et al.
patent: 4683560 (1987-07-01), Takeuchi et al.
patent: 6246648 (2001-06-01), Kuribayashi
patent: 6424605 (2002-07-01), Iida
patent: 6510111 (2003-01-01), Matsuura
patent: 6747921 (2004-06-01), Wakabayashi et al.
patent: 6754154 (2004-06-01), Takeda et al.

Affiliated with

Also associated with

Rating

Optical disc player with focus pull-in function does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Optical disc player with focus pull-in function, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disc player with focus pull-in function will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3794121