Patent ID: 7656098

Claim:
An improved brightness control apparatus of a light bulb module, comprising: a microcontroller, having a power pin, a ground pin and a plurality of pins; a capacitance step-down rectification circuit, for converting an external alternate current into a direct current, and supplying said direct current for the use of an overall circuit system; an output control circuit, for receiving a control signal transmitted from said microcontroller, and controlling a total power consumption of said light bulb of said light bulb module, characterized in that a signal receiving circuit is provided for receiving a phase angle of a received voltage and a current conduction status; an amplification circuit includes a terminal electrically coupled to said output control circuit for detecting the total power consumption of said light bulb module, and another terminal electrically coupled to said microcontroller; and a failure protection circuit installed between said light bulb module and said amplification circuit, for preventing an output from said power input terminal to said failure protection circuit when any one of said output control circuit, said signal receiving circuit and said amplification circuit fails, and said failure protection circuit is electrically coupled to said microcontroller.