Abstract
The configuration of a control circuit for area control driving circuit of a LED light source and a controlling method thereof are provided in the present invention. The proposed control circuit includes a plurality of error amplifiers each of the error amplifiers receiving a feedback current signal and an external reference voltage, and generating an error signal, a buffer register generating a plurality of paralleled digital signals, a work register outputting the plurality of paralleled digital signals and a plurality of switches each of the switches coupled to the work register, receiving a specific error signal and a specific paralleled digital signal, and generating a driving signal controlling a driving current of an area of the light source such that the light source sends out a light and controls an illumination of the light in the area accordingly.