发明名称 |
SEMICONDUCTOR CIRCUIT FOR DRIVING LIGHT EMITTING DIODE, AND LIGHT EMITTING DIODE DRIVING APPARATUS |
摘要 |
A light emitting diode drives a semiconductor circuit in order to drive a light emitting diode that emits light by applying the output voltage of the rectifier circuit. The light emitting diode includes a switching element connected between the light emitting diode and the ground potential. An input voltage detection circuit that detects the output voltage of the rectifier circuit to output a light emitting signal or a extinction signal. A current detection circuit detects the current flowing into the switching element. A control circuit intermittently controls on/off of the switching element at a predetermined oscillating frequency based on the output signal of the current detection circuit while the input voltage detection circuit is outputting the light emitting signal.
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申请公布号 |
US2009224686(A1) |
申请公布日期 |
2009.09.10 |
申请号 |
US20050720868 |
申请日期 |
2005.12.14 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
KUNIMATSU TAKASHI |
分类号 |
H01L33/00;H05B41/36;H05B37/02 |
主分类号 |
H01L33/00 |
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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