发明名称 |
HIGH PRESSURE DISCHARGE LAMP DRIVING APPARATUS, LUMINAIRE AND HIGH PRESSURE DISCHARGE LAMP DRIVING METHOD |
摘要 |
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
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申请公布号 |
CA2353747(C) |
申请公布日期 |
2004.11.09 |
申请号 |
CA20012353747 |
申请日期 |
2001.07.25 |
申请人 |
HARISON TOSHIBA LIGHTING CORP. |
发明人 |
YUDA, TOKUJI;KATOH, JUNICHI |
分类号 |
H05B41/24;H05B41/282;H05B41/292;(IPC1-7):H05B41/14;H05B41/231 |
主分类号 |
H05B41/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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