Patent ID: 8941313
Filing Date: 2015-01-27
Classification: H05B,Y02B

Abstract:
1. A driving circuit for driving a light emitting unit to operate, the driving circuit comprising: an operating voltage supplying unit configured to supply a voltage input for the driving circuit; a driving unit coupled to the operating voltage supplying unit and configured to drive the light emitting unit to make the light emitting unit turn on or turn off; and a feedback control unit coupled between the driving unit and the light emitting unit, and configured to form a feedback loop together with the driving circuit and the light emitting unit to stabilize an operating current of the light emitting unit; wherein the driving unit comprises a switch unit and a soft switching on/off setting unit successively coupled in series between the operating voltage supplying unit and the driving unit, wherein the switch unit controls the soft switching on/off setting unit to operate in a soft switching on setting state or a soft switching off setting state so as to control soft switching on or off of the light emitting unit; and wherein the driving unit is configured to comprise a first transistor, a base thereof being connected to a positive input terminal of the operating voltage supplying unit, an emitter thereof being connected to the light emitting unit, and a base thereof being connected to a first setting terminal of the soft switching on/off setting unit via a first base resistor.