Projector and power supply device

Details Projector and power supply device Projector and power supply device

2005-05-31

2005-05-31

Perkey, W. B. (Department: 2851)

Optics: image projectors

Lamp control

C315S119000, C315S20000A, C315S247000, C315S307000

Reexamination Certificate

active

06899434

ABSTRACT:
A projector judges whether a power-factor improving circuit disposed between a rectifying circuit and a DC—DC converting circuit is operated or not, from a voltage appearing in an auxiliary winding wound in the primary side of a transformer to which an output of the power-factor improving circuit is applied. If it is judged that the power-factor improving circuit is not operated, a lamp power supplying circuit to which the output of the power-factor improving circuit is supplied, and which turns on a light source lamp is stopped. Therefore, the light source lamp can be prevented from being unnecessarily impaired, and the power consumption of the main unit can be suppressed, so that the running cost can be reduced.

REFERENCES:
patent: 6791285 (2004-09-01), Greenwood et al.
patent: 8-172773 (1996-07-01), None
patent: P2000-224847 (2000-08-01), None
patent: P2001-333573 (2000-11-01), None

Affiliated with

Also associated with

Rating

Projector and power supply device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Projector and power supply device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Projector and power supply device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3463167