Drive apparatus

Details Drive apparatus Drive apparatus

2006-02-21

2008-09-02

Ip, Paul (Department: 2837)

Electricity: motive power systems

Positional servo systems

C318S561000, C318S590000, C318S652000, C369S030170, C369S044280, C369S044290

Reexamination Certificate

active

07420348

ABSTRACT:
Optical disc drives designed for reduced power consumption switch the supply voltage in three stages between first, second, and third power supplies. The reduction in power consumption that is possible in the focusing and tracking drive circuits with three stage switching control is limited. This drive apparatus enables further reductions in power consumption. A drive output tracking signal is generated according to the drive conditions of the focusing or tracking drive circuit. The drive output tracking signal is applied to the drive circuit power supply, and the power supply is controlled according to the drive output tracking signal. A power supply change detector detects sudden changes in the drive output tracking signal, and inputs the detection signal to the DSP controlling the entire system. The DSP determines whether to improve the power supply response by comparison with predetermined conditions, and returns the result to the power supply.

REFERENCES:
patent: 5015932 (1991-05-01), Wachi
patent: 5101386 (1992-03-01), Kojima et al.
patent: 5195067 (1993-03-01), Yanagi
patent: 5309417 (1994-05-01), Onodera et al.
patent: 5581527 (1996-12-01), Onodera et al.
patent: 6236032 (2001-05-01), Kamiyama
patent: 6628580 (2003-09-01), Kishimoto et al.
patent: 6819636 (2004-11-01), Soma et al.
patent: 6894957 (2005-05-01), Shimada
patent: 6925037 (2005-08-01), Kishimoto et al.
patent: 6934227 (2005-08-01), Nakata et al.
patent: 6952387 (2005-10-01), Nishio et al.
patent: 7106666 (2006-09-01), Ishikawa et al.
patent: 7304919 (2007-12-01), Ando
patent: 2003/0043706 (2003-03-01), Nakata et al.
patent: 2003/0210615 (2003-11-01), Uchida et al.
patent: 2004/0004923 (2004-01-01), Hirai et al.
patent: 2004/0013056 (2004-01-01), Ando
patent: 2005/0094508 (2005-05-01), Seo
patent: 2005/0117465 (2005-06-01), Kishimoto et al.
patent: 2005/0195707 (2005-09-01), Park et al.
patent: 2006/0221470 (2006-10-01), Kurokawa
patent: 2006/0238160 (2006-10-01), Fukamizu et al.
patent: 2006/0285455 (2006-12-01), Cheng et al.
patent: 2007/0147206 (2007-06-01), Tada
patent: 2007/0183277 (2007-08-01), Matsumoto
patent: 2007/0253305 (2007-11-01), Watanabe et al.
patent: 2007/0256088 (2007-11-01), Yamamoto et al.
patent: 2007/0263882 (2007-11-01), Nakata
patent: 02-046575 (1990-02-01), None
patent: 03-005922 (1991-01-01), None
patent: 04-026929 (1992-01-01), None
patent: 05-314481 (1993-11-01), None
patent: 2001-155349 (2001-06-01), None
patent: 2003-132555 (2003-05-01), None
patent: 3513062 (2004-01-01), None

Affiliated with

Also associated with

Rating

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

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3979146