Lighting device having multi-stage chip power supplying mechanism capable of improving driving efficiency

A lighting device having multi-stage chip power supplying mechanism capable of improving driving efficiency, comprising:

• a light-emitting module;
• a rectifying module configured to generate a rectified voltage;
• a pre-startup module configured to receive the rectified voltage to enter on state and convert the rectified voltage into a pre-startup voltage;
• a power factor correction module configured to receive the pre-startup voltage to enter on state and convert the rectified voltage into a corrected voltage;
• a voltage converting module configured to convert the corrected voltage into a driving voltage in order to drive the light-emitting module, wherein the voltage converting module comprises a volage extracting unit configured to convert the driving voltage into an output voltage according to a default converting ratio;
• and
• an auxiliary power source module configured to convert the output voltage into an operating voltage so as to drive the power factor correction module;
• wherein the pre-startup module is configured to enter an off state in order to disconnect from the power factor correction module after the power factor correction module is driven by the operating voltage.