发明名称 |
Driving circuit for piezoelectric transformer, cold-cathode tube light-emitting apparatus, liquid crystal panel and device with built-in liquid crystal panel |
摘要 |
A driving circuit for a piezoelectric transformer is provided, which ensures lighting of all the cold-cathode tubes connected to the piezoelectric transformer, and reduces the difference in brightness between the cathode tubes during steady lighting, thereby enhancing reliability and performance. A plurality of cold-cathode tubes connected to a secondary side of the piezoelectric transformer, and a cold-cathode tube output detector circuit connected in series to a plurality of cold-cathode tubes, for detecting an output state of the respective cold-cathode tubes are provided, and the driving of the piezoelectric transformer is controlled based on a detection signal from the cold-cathode tube output detector circuit. Because of this, the piezoelectric transformer performs the same operation as that with respect to one cold-cathode tube.
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申请公布号 |
US7038354(B2) |
申请公布日期 |
2006.05.02 |
申请号 |
US20020306516 |
申请日期 |
2002.11.27 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
TAKEDA KATSU;NAKATSUKA HIROSHI;MORITOKI KATSUNORI |
分类号 |
H01L41/107;H01L41/04;H05B41/282;H05B41/285;H05B41/392 |
主分类号 |
H01L41/107 |
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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