| 摘要 |
PURPOSE: An electric driving circuit of a light emitting unit is provided to control the brightness of the light emitting unit by controlling an input current of the light emitting unit through the control of a variable resistor. CONSTITUTION: A first rectification unit(30) converts an AC voltage(10) into a DC voltage by receiving the AC voltage. A first driving transistor(40) includes a first gate, a first sourcing(46), and a first sinking(44). The first sourcing outputs a driving current due to a voltage difference between the gate and the first sourcing. A first light emitting unit is connected between a second end and a rectification unit.
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