Patent ID: 7317454

Claim:
An energy recovery circuit of a display device, which provides a driving voltage to a display panel, the energy recovery circuit comprising: a first capacitor for charging a voltage of ½ sustain voltage recovered from the display panel; a switch circuit connected between the first capacitor and the display panel, the switch circuit having a plurality of switches for switching current flows when charging/discharging the first capacitor and the display panel, and having a single inductor serially connected to the display panel to form an LC resonance circuit; a second capacitor connected between the switches of the switch circuit, for discharging its charged voltage of ½ sustain voltage to a first end of the display panel along with the voltage discharged from the first capacitor to the first end of the display panel when charging the display panel; and a power supply for providing a voltage to the first and second capacitors, wherein the switch circuit includes: the first and third switches connected to the first capacitor in parallel, and also connected to each other serially, the second capacitor connected to the first switch in parallel, the inductor connected to at least one of the first and third switches, and second and fourth switches connected to a node between the display panel and the inductor.