发明名称 |
BYPASS PROTECTION CIRCUIT AND LIGHT EMITTING DIODE DRIVING DEVICE USING THE SAME |
摘要 |
A bypass protection circuit connected to a light emitting diode (LED) group in parallel, comprises a switch circuit and a capacitor. The switch circuit comprises a plurality of switch components, an abnormal detection module and a switch control module. The abnormal detection module detects voltage of the LEDs respectively, and determines which one is broken and outputs an abnormal signal. The switch control module controls a switch component connected to the broken LED in parallel on/off according to the abnormal signal. The capacitor is charged by driving signals of the LEDs when the LEDs are operated according to a normal working mode or a first status of a burst dimming mode, and is discharged to maintain an operating power of the switch circuit when the LEDs are operated according to a second status of the burst dimming mode.
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申请公布号 |
US2011148306(A1) |
申请公布日期 |
2011.06.23 |
申请号 |
US20100702226 |
申请日期 |
2010.02.08 |
申请人 |
AMPOWER TECHNOLOGY CO., LTD.;HON HAI PRECISION INDUSTRY CO., LTD. |
发明人 |
GER CHIH-CHAN;CHEN CHIA-KUN;LU CHI-CHANG |
分类号 |
H05B37/03 |
主分类号 |
H05B37/03 |
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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