发明名称 |
Ballast for a discharge lamp |
摘要 |
A ballast for a discharge lamp comprises a smoothing capacitor, an inverter circuit including at least one switching device connected in parallel to the smoothing capacitor, a driving circuit for driving the inverter circuit, an activating circuit for activating the driving circuit, a resonance circuit including first and second capacitors and an inductor connected to output terminals of the inverter circuit, a discharge lamp connected to output terminals of the resonance circuit, a third capacitor connected in parallel to the discharge lamp. A fourth capacitor and first and second rectifying elements connected in series are connected in parallel to the smoothing capacitor. Between both terminals of the fourth capacitor and terminals for connection to an AC power source, a filter and a rectifier are inserted. A terminal of the first capacitor other than that connected to the inverter circuit is connected to a junction of the first and second rectifying elements.
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申请公布号 |
US6054815(A) |
申请公布日期 |
2000.04.25 |
申请号 |
US19990281466 |
申请日期 |
1999.03.30 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL., LTD. |
发明人 |
SUGITA, KAZUSHIGE;OZAWA, MASATAKA;GYOTEN, MASAYOSHI;MURAKAMI, MASANOBU |
分类号 |
H05B41/24;H05B41/28;H05B41/392;(IPC1-7):H05B37/00 |
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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