Patent ID: 6999050

Claim:
An apparatus for recycling energy in a liquid crystal display (LCD) so as to reduce energy loss when the LCD is driven by a driving circuit, the LCD including a first pixel and a second pixel, the first pixel having a first pixel capacitor and the second pixel having a second pixel capacitor, wherein when the LCD is in operation, a first pixel voltage and a second pixel voltage are applied to the first pixel and the second pixel respectively, the polarities of the first and the second pixels are variable with time and are inverse to each other, the apparatus comprising: a first switch, coupled to the first pixel capacitor, for selectively coupling the first pixel capacitor to the apparatus; a second switch, coupled to the second pixel capacitor, for selectively coupling the second pixel capacitor to the apparatus; and an energy converter which includes a rectifier coupled to the first switch and the second switch, the rectifier outputting a rectified voltage which is a direct current (DC) voltage according to the first pixel voltage and the second pixel voltage, the energy converter outputting converted energy according to the rectified voltage in a form and magnitude determined according to a load device coupled to the energy converter; wherein the apparatus recycles energy dissipated during polarity inversion for the first pixel and the second pixel as the converted energy for driving the load device by enabling the first switch and the second switch selectively.