发明名称 |
Control apparatus of fluorescent lamp. |
摘要 |
A control apparatus of fluorescent lamp detecting an end-of-life state of a fluorescent lamp for making it possible to have suitable countermeasures taken. In the control apparatus, a load circuit is formed of a capacitor connected between filaments of a fluorescent lamp and a choke coil connected in series with the filament, and there are provided a detection coil for detecting a tube current flowing through the load circuit and a detection circuit receiving an output voltage of a rectifier circuit rectifying the output of the detection coil for detecting a rise in the output voltage occurring when the output frequency of an oscillation circuit is modulated by a modulation circuit. <IMAGE> |
申请公布号 |
EP0576991(A2) |
申请公布日期 |
1994.01.05 |
申请号 |
EP19930110047 |
申请日期 |
1993.06.23 |
申请人 |
SANYO ELECTRIC CO., LTD. |
发明人 |
MATSUZAWA, SHIGEO;KAKINUMA, MITSURU |
分类号 |
H05B41/16;H05B37/03;H05B41/24;H05B41/298;H05B41/392 |
主分类号 |
H05B41/16 |
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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