Patent ID: 8077171

Claim:
A signal regulator module for adjusting driving signals outputted by a driving circuit to light sources of a display panel comprising: a first floating current regulator electrically coupled to the driving circuit and a first light source of the display panel for regulating a first driving signal outputted by the driving circuit to the first light source, adjusting the first driving signal by photo-coupling based on a first feedback signal, and outputting the adjusted first driving signal; a second floating current regulator electrically coupled to the driving circuit and a second light source of the display panel for regulating a second driving signal outputted by the driving circuit to the second light source, adjusting the second driving signal by photo-coupling based on a second feedback signal, and outputting the adjusted second driving signal; a first signal sensor electrically coupled to the first floating current regulator for generating a corresponding first voltage signal by photo-coupling based on the first driving signal; a second signal sensor electrically coupled to the second floating current regulator and the feedback controller for generating a corresponding second voltage signal by photo-coupling based on the second driving signal; and a feedback controller comprising: an averaging circuit electrically coupled to the first and second signal sensors for receiving the first and second voltage signals, thereby generating an averaging signal corresponding to an average value of the first and second voltage signals; a first proportional integral controller (PI controller) electrically coupled to the first floating current regulator and the averaging circuit for adjusting the averaging signal based on the averaging signal and the first reference signal; and a second PI controller electrically coupled to the second floating current regulator and the averaging circuit for adjusting the averaging signal based on the averaging signal and the second reference signal; and a digital controller electrically coupled to the feedback controller for outputting a first reference signal corresponding to display characteristics of the first light source and a second reference signal corresponding to display characteristics of the second light source to the feedback controller, which thereby generates the first feedback signal based on the averaging signal and the first reference signal, as well as generates the second feedback signal based on the averaging signal and the second reference signal.