Optics: image projectors – Temperature control – Blower
Reexamination Certificate
2005-10-18
2005-10-18
Mahoney, Christopher (Department: 2851)
Optics: image projectors
Temperature control
Blower
Reexamination Certificate
active
06955434
ABSTRACT:
A method and apparatus for adjusting cooling in a projection system, mainly comprises a fan, a louver installed at an air outlet and a sensor neighbor therewith. The fan is allowed to rotate to drive air at a predetermined rotational speed when the projection system is turned on, the louver is at a predetermined open rate at this time and the sensor is used to detect air temperature. When the air temperature is risen gradually beyond a predetermined temperature, the open rate of the louver is first increased gradually; and, when the air temperature is risen continuously and the open rate of the louver reaches its maximum, the rotational speed of the fan is then increased. When the air temperature is lowered down and the rotational speed of the fan is higher than a predetermined rotational speed, the rotational speed of the fan is first decreased gradually; and, when the air temperature is continuously lowered down and the rotational speed of the fan is decreased reaches its predetermined speed, the open rate of the louver is then decreased gradually. The louver is closed when the system is turned off. Therefore, an airflow resistance is decreased to increase a cooling efficiency so as to alleviate noise of fan by adjusting the open rate of the louver.
REFERENCES:
patent: 6563255 (2003-05-01), Collins
patent: 6641267 (2003-11-01), Ohishi et al.
Coretronic Corporation
Hsu Winston
Mahoney Christopher
LandOfFree
Method and apparatus for adjusting cooling in projection system does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus for adjusting cooling in projection system, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for adjusting cooling in projection system will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3440403