H - Electricity – 05 – B
Patent
H - Electricity
05
B
H05B 41/14 (2006.01) H05B 41/231 (2006.01) H05B 41/292 (2006.01)
Patent
CA 2353747
Disclosed a high pressure discharge lamp driving apparatus for driving a high pressure discharge lamp during a stable operation thereof with an AC lamp current alternating for opposite half-cycle periods, the apparatus comprising an AC lamp current supply for supplying the AC lamp current to the high pressure discharge lamp, a detector for detecting the output AC lamp current to the high pressure discharge lamp, a controller responsive to the detector for controlling the AC supply to output the AC lamp current with a waveform which is characterized by that (i) a mean value in the second half of each half-cycle period is larger than the means value of the first half of each half-cycle period, (ii) no pulse current is contained in the second half of each half-cycle period, (iii) the AC lamp current has a maximum value immediately after polarity change between the positive and negative half-cycle periods, and (iv) the AC lamp current has also a waveform defined by that the ratio (d/a) of the maximum value (d) of the AC lamp current and a mean value (a) of the AC lamp current in its each half-cycle period satisfies a following equation. 1.05 ~ d/a ~ 1.80
Katoh Junichi
Yuda Tokuji
Fetherstonhaugh & Co.
Harison Toshiba Lighting Corp.
LandOfFree
High pressure discharge lamp driving apparatus, luminaire... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with High pressure discharge lamp driving apparatus, luminaire..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and High pressure discharge lamp driving apparatus, luminaire... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1826386