Patent ID: 7053891

Claim:
An LCD with power conversion capability comprising: a built-in power conversion module to convert AC input into DC operating voltage for the LCD, wherein the power conversion module comprises: a rectification/filter unit, to convert the AC input into a ripple DC voltage; a power conversion unit coupled to the rectification/filter unit, to convert the ripple DC voltage into DC operating voltage for a main board in the LCD; an output rectification/filter unit coupled to the power conversion unit, to filter the DC operating voltage; a driving unit coupled to the power conversion unit, to control the power conversion unit for conversion of the AC input to DC operating voltage; a feedback unit coupled to the output rectification/filter unit, to detect the DC operating voltage variation from the output rectification/filter unit; and a power management unit coupled between the driving unit and the feedback unit, to receive a start voltage output by the rectification/filter unit, output a series of impulses to the driving unit for operation and adjust the impulses' width according to the variation of the DC operating voltage detected by the feedback unit; and wherein an output terminal of the built-in power conversion module is coupled to the main board in the LCD using a power output bus.