Illumination – Light source and modifier – With ventilating – cooling or heat insulating means
Reexamination Certificate
2003-12-04
2010-02-02
Owens, Douglas W (Department: 2821)
Illumination
Light source and modifier
With ventilating, cooling or heat insulating means
C353S052000, C353S057000, C315S309000, C315S118000
Reexamination Certificate
active
07654696
ABSTRACT:
A lighting unit is described which has a discharge lamp (1), in particular a high pressure or high intensity discharge (HID) lamp or an ultra high performance (UHP) lamp, a lamp driver (2) and a cooling device (3). To reduce mechanical stresses caused by temperature variations in the lamp (1), one or more operating parameters of the lamp (1) are detected. In addition, a control unit is provided for controlling the lamp driver (2) and/or the cooling device (3) at least during switching on and/or off of the lighting unit in such a way that there is no excursion from a predetermined range of the at least one operating parameter. By selecting the parameter range suitably, the service life of the lamp may be extended considerably or the power of the lamp may be increased while the service life remains the same.
REFERENCES:
patent: 2177704 (1939-10-01), Francis
patent: 2196022 (1940-04-01), Moyer
patent: 3470415 (1969-09-01), Michalski
patent: 4283658 (1981-08-01), Parker
patent: 4533853 (1985-08-01), Hammond
patent: 4672271 (1987-06-01), Gear et al.
patent: 4887122 (1989-12-01), Morikawa
patent: 5583396 (1996-12-01), Hideaki et al.
patent: 5705897 (1998-01-01), Hanazaki et al.
patent: 5909085 (1999-06-01), Nelson
patent: 5962990 (1999-10-01), Kern
patent: 6016031 (2000-01-01), Lapatovich et al.
patent: 6398366 (2002-06-01), Hara et al.
patent: 6443575 (2002-09-01), Miyamoto et al.
patent: 6588907 (2003-07-01), Billington et al.
patent: 6621239 (2003-09-01), Belliveau
patent: 6635999 (2003-10-01), Belliveau
patent: 6709111 (2004-03-01), Hirao et al.
patent: 6788009 (2004-09-01), Fujii et al.
patent: 2002/0118160 (2002-08-01), Nakamura et al.
patent: 10028657 (2001-12-01), None
patent: 1 017 257 (2000-05-01), None
Maes Wouter Jozef
Mönch Holger
Pollmann-Retsch Jens
Verstraeten Edmond Mariette Emile
Alemu Ephrem
Koninklijke Philips Electronics , N.V.
Owens Douglas W
LandOfFree
Lighting unit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Lighting unit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Lighting unit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-4159596