Electricity: motive power systems – Open-loop stepping motor control systems
Reexamination Certificate
2011-07-12
2011-07-12
Ip, Paul (Department: 2837)
Electricity: motive power systems
Open-loop stepping motor control systems
C318S254100, C318S685000, C368S047000, C368S076000, C368S157000
Reexamination Certificate
active
07977909
ABSTRACT:
A stepping motor driving apparatus of an analog electronic clock, in which, when the rotation of a rotor is not detected after a pulse is supplied to a coil of a stepping motor, a first switching control section switches the pulse supplied to the coil to a pulse having a larger effective value, and when the rotation of the rotor is detected continuously for a predetermined period or a predetermined number of times, a second switching control section switches the pulse supplied to the coil to a pulse having a smaller effective value, wherein the apparatus further includes a third switching control section that switches a driving pulse to a pulse having a smaller effective value when the rotation of the rotor is not detected for two times continuously, even after the first switching section increases the effective value of the driving pulse for two times continuously.
REFERENCES:
patent: 4326278 (1982-04-01), Shida et al.
patent: 6108279 (2000-08-01), Hara
patent: 6349075 (2002-02-01), Miyauchi et al.
patent: 6476579 (2002-11-01), Akahane et al.
patent: 6999381 (2006-02-01), Fujisawa et al.
patent: RE40370 (2008-06-01), Sato et al.
patent: 2003/0174584 (2003-09-01), Fujisawa et al.
patent: 58-213279 (1983-12-01), None
patent: 61-40949 (1986-09-01), None
patent: 6-43266 (1994-02-01), None
patent: 10-225185 (1998-08-01), None
patent: 2005-195436 (2005-07-01), None
M. Ueda et al; Adaptive Controlled Drive System of Stepping Motor for Analog Quartz Watch; The Horological Institute of Japan; 1980; No. 92; pp. 1-13.
Chinese Office Action dated Jul. 8, 2010 and English translation thereof, issued in counterpart Chinese Application No. 200910008006.2.
Japanese Office Action dated Dec. 15, 2009 and English translation thereof issued in a counterpart Japanese Application No. 2008-038095.
Kasuo Tomoo
Kawaguchi Yohei
Ochiai Fumiaki
Casio Computer Co. Ltd.
Holtz Holtz Goodman & Chick PC
Ip Paul
LandOfFree
Device and method of driving stepping motor of analog... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Device and method of driving stepping motor of analog..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Device and method of driving stepping motor of analog... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2664277