发明名称 |
Driving device for fluorescent tube |
摘要 |
A driving device for a fluorescent tube has a high frequency oscillator which outputs a high frequency AC signal. A pulse width modulator is connected to the high frequency oscillator for outputting a PWM harmonic frequency signal. A first power switch is connected to the pulse width modulator for being turned off during a positive half-cycle of the PWM harmonic frequency signal and being turned on during a negative half-cycle of the PWM harmonic frequency signal. A second power switch is connected to the pulse width modulator for being turned on during the positive half-cycle of the PWM harmonic frequency signal and being turned off during the negative half-cycle of the PWM harmonic frequency signal. A piezoelectric transformer includes a primary winding having two input terminals connected to the first power switch and the second power switch, respectively, and a center terminal connected to the output terminal of the pulse width modulator.
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申请公布号 |
US6380695(B1) |
申请公布日期 |
2002.04.30 |
申请号 |
US20000729268 |
申请日期 |
2000.12.05 |
申请人 |
INSTITUTE FOR INFORMATION INDUSTRY |
发明人 |
LIN CHIH-HUNG;HSIEH JUNG CHAN |
分类号 |
G09G3/34;H02M7/538;H02M7/5381;H05B41/282;H05B41/392;(IPC1-7):G05F1/00 |
主分类号 |
G09G3/34 |
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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