发明名称 |
DIMMING CONTROL OF ELECTRONIC BALLASTS |
摘要 |
The invention provides an apparatus and a method for controlling the power output of a fluorescent lamp in order to provide dimming control. The fluorescent lamp is driven by an electronic ballast, for example a half-bridge resonant inverter, and the electronic ballast is switched at a constant frequency and with a constant duty-cycle, but with a variable DC voltage power input. Dimming control is provided by variation of the DC voltage power supply. The variable DC supply may be obtained from an AC source followed by a power factor corrected AC-DC variable converter, or a DC source followed by a variable DC-DC converter.
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申请公布号 |
US2002014861(A1) |
申请公布日期 |
2002.02.07 |
申请号 |
US19980170512 |
申请日期 |
1998.10.13 |
申请人 |
HUI SHU-YUEN RON;CHUNG SHU-HUNG HENRY |
发明人 |
HUI SHU-YUEN RON;CHUNG SHU-HUNG HENRY |
分类号 |
H05B41/282;H05B41/392;(IPC1-7):H05B37/02 |
主分类号 |
H05B41/282 |
代理机构 |
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主权项 |
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地址 |
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