Power supply device and image forming apparatus using the same

Details Power supply device and image forming apparatus using the same Power supply device and image forming apparatus using the same

2006-04-13

2009-06-23

Brase, Sandra L (Department: 2852)

Electrophotography

Machine operation

Having power supply

C399S101000

Reexamination Certificate

active

07551871

ABSTRACT:
A power supply device includes a plurality of DC voltage generating circuits that share a voltage control circuit controlling a voltage to be supplied to a voltage stabilizing capacitor. The voltage control circuit and the DC voltage generating circuits are controlled so that supplying voltage to the capacitor is stopped to stop output, that a first DC voltage generating circuit among the plurality of DC voltage generating circuits is driven for a predetermined time period and is then stopped, and that supplying voltage to the capacitor is started and also a second DC voltage generating circuit among the plurality of DC voltage generating circuits starts to be driven to output a positive bias, in order to sequentially perform a stop of output from the first DC voltage generating circuit and a start of output from the second DC voltage generating circuit. Accordingly, overshoot of an output voltage is prevented.

REFERENCES:
patent: 5132738 (1992-07-01), Nakamura et al.
patent: 5337127 (1994-08-01), Imaue
patent: 5621509 (1997-04-01), Karashima et al.
patent: 6759766 (2004-07-01), Hiratsuka et al.
patent: 33 72 619 (2002-11-01), None
patent: 2003-189595 (2003-07-01), None
patent: 2004-198481 (2004-07-01), None
patent: 2004-198481 (2004-07-01), None
English translation of Chinese Office Action in corresponding Chinese Application No. 2006-100721335 dated Apr. 4, 2008.

Affiliated with

Also associated with

Rating

Power supply device and image forming apparatus using the same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Power supply device and image forming apparatus using the same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power supply device and image forming apparatus using the same will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4147754