Patent ID: 8106878

Claim:
A backlight modulation circuit comprising: a first modulation section configured to generate a first backlight modulation signal; a second modulation section configured to generate a second backlight modulation signal; and a backlight modulation section configured to modulate illumination of a backlight module according to the first and second backlight modulation signals; a signal processing section configured to transform external commands into a first and a second controlling signals, the first and second controlling signals being sent to the first and second modulation sections, respectively; and wherein the backlight modulation circuit further comprises a first integration circuit, a second integration circuit, and a summing circuit, the first and second integration circuits carry out integration calculations on the first and second backlight modulation signals respectively and output a first and a second analog backlight modulation signals to the summing circuit, the summing circuit carries out a summing calculation with respect to the first and second analog backlight modulation signals and outputs a complex modulation signal to the backlight modulation section, and the backlight modulation section modulates illumination of the backlight module according to the complex backlight modulation signal.