发明名称 |
High efficiency 4-lamp instant start ballast |
摘要 |
An instant-start ballast for a multiple gas discharge lamp fixture has a single half-bridge inverter that is used to drive at least two series resonant output circuits. Each series resonant output circuit is used to drive two gas discharge lamps. A single output voltage limiting circuit is provided with a microprocessor that monitors the combined output voltages of the series resonant output circuits and uses a single voltage limiting transistor to control the output voltages of the circuits. A capacitor is associated with each gas discharge lamp socket in the fixture such that a voltage across the capacitor indicates that a lamp has been installed in the socket associated with the capacitor. The ignition sequence will only be initiated if the capacitor voltages indicate that a lamp has been installed in each socket of a fixture.
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申请公布号 |
US2005168164(A1) |
申请公布日期 |
2005.08.04 |
申请号 |
US20040004605 |
申请日期 |
2004.12.03 |
申请人 |
SHACKLE PETER;DERNOVSEK JOHN J.;DREW BARRIE;YU QINGHONG |
发明人 |
SHACKLE PETER;DERNOVSEK JOHN J.;DREW BARRIE;YU QINGHONG |
分类号 |
H05B41/00;H05B41/14;H05B41/26;H05B41/285;H05B41/36;(IPC1-7):H05B37/02 |
主分类号 |
H05B41/00 |
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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