发明名称 |
Scheme for sensing ballast lamp current |
摘要 |
A light source including a ballast characterized by a resonant frequency and including a reference bus and a transformer having a secondary winding. The fluorescent lamp is partially covered by a shield, connected to the reference bus and coupled to the secondary winding. The ballast further includes a current sensor connected between the secondary winding and reference bus for sensing current flow through at least the lamp including that portion of lamp current attributable to parasitic capacitances affecting the resonant frequency.
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申请公布号 |
US5973437(A) |
申请公布日期 |
1999.10.26 |
申请号 |
US19970966724 |
申请日期 |
1997.11.10 |
申请人 |
PHILIPS ELECTRONICS NORTH AMERICA CORPORATION |
发明人 |
GRADZKI, PAWEL M.;WACYK, IHOR T. |
分类号 |
H05B41/24;H05B41/282;H05B41/36;H05B41/392;(IPC1-7):H05B37/02 |
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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