Optical disc discriminating method and optical disc apparatus

Details Optical disc discriminating method and optical disc apparatus Optical disc discriminating method and optical disc apparatus

2011-06-14

2011-06-14

Hindi, Nabil Z (Department: 2627)

Dynamic information storage or retrieval

Condition indicating, monitoring, or testing

Including radiation storage or retrieval

C369S044260, C369S094000

Reexamination Certificate

active

07961576

ABSTRACT:
A detection signal is asserted when a surface of an optical disc or an information recording layer is detected. An asserting (masking) time interval of the detection signal is set such that the number of times of asserting the detection signal becomes at most two times when a focal position of the objective lens passes at least the surface of the optical disc. After the objective lens is moved for a prescribed section in a direction along which the objective lens comes closer to the optical disc, a kind of the optical disc is discriminated based on a time interval T1from a first beginning of assertion to a second beginning of assertion, if the number of times of asserting the detection signal is two times, or based on a time interval which is a longer time interval between the time interval T1from the first beginning of assertion to the second beginning of assertion and a time interval T2from the second beginning of assertion to a third beginning of assertion if the number of times of asserting the detection signal is more than two times.

REFERENCES:
patent: 5710749 (1998-01-01), Tsukai et al.
patent: 6711103 (2004-03-01), Ueki
patent: 7139229 (2006-11-01), Yamanoi et al.
patent: 7149169 (2006-12-01), Juan et al.
patent: 7242645 (2007-07-01), Takahashi et al.
patent: 7492685 (2009-02-01), Jodorkovsky et al.
patent: 7746747 (2010-06-01), Hasegawa
patent: 2007/0070849 (2007-03-01), Saitoh et al.
patent: 0 840 303 (1998-05-01), None
patent: 11-134780 (1999-05-01), None
patent: 2006-277848 (2006-12-01), None
patent: 2007-095130 (2007-12-01), None

Affiliated with

Also associated with

Rating

Optical disc discriminating method and optical disc apparatus 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 discriminating method and optical disc apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optical disc discriminating method and optical disc apparatus will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2700080