发明名称 |
Balanced feedback system for floating cold cathode fluorescent lamps |
摘要 |
An apparatus and method are provided for driving a cold cathode fluorescent lamp in a floating configuration with an inverter circuit having a transformer with a primary winding and two secondary windings. At least one sense resistor is coupled in series between terminals of the secondary windings. The other terminal of each secondary winding is coupled to a respective end of the fluorescent lamp. A rectifier is coupled to the secondary portion of the transformer to receive a signal indicative of the current in at least one end of the fluorescent lamp and generates a feedback signal. A control and drive circuit generates drive signals based on the feedback signal to control the current in the fluorescent lamp and outputs the drive signals to the primary transformer winding.
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申请公布号 |
US6130509(A) |
申请公布日期 |
2000.10.10 |
申请号 |
US19990236138 |
申请日期 |
1999.01.22 |
申请人 |
DELL COMPUTER CORPORATION |
发明人 |
KATES, BARRY K.;CUMMINGS, JOHN |
分类号 |
H05B41/282;(IPC1-7):H05B37/02 |
主分类号 |
H05B41/282 |
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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