LED DRIVING CIRCUIT OF MULTI-STAGE SWITCH BULB LAMP
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United States of America Patent
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Issued Date -
Jun 9, 2016
app pub date -
Feb 13, 2015
filing date -
Dec 5, 2014
priority date (Note) -
Abandoned
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Abstract
An LED driving circuit of a multi-stage switch bulb lamp includes a power modulation module having a first switch, a second switch, a first transistor, a second transistor, a first resistor, a second resistor, a third resistor and a fourth resistor. The first and second switches are respectively and serially connected to the first and second transistors, the first transistor is electrically connected to the second resistor, the other end of the second resistor is serially connected to the third resistor to form a reference voltage node and has a reference voltage, the first and second transistors are electrically connected to the reference voltage node, the other end of the third resistor is serially connected to the fourth resistor, and the second transistor is electrically connected to the third resistor. The first and second switches may be turned on/off to adjust the reference voltage value and change the power.
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