Data driving circuit for driving liquid crystal panel and driving method of liquid crystal panel

A data driving circuit for driving a liquid crystal panel, comprising:

• a processing module, configured for determining grayscale levels will be displayed by pixels on an nth scanning line and judging driving voltage polarities of the pixels on the nth scanning line;
• a storing module, configured for storing duty cycles of charging voltages corresponding to grayscale levels of pixels on the liquid crystal panel;
• a switching module, configured for reading out duty cycles of charging voltages corresponding to the grayscale levels will be displayed by the pixels on the nth scanning line from the storing module, and for controlling charging times of the pixels on the nth scanning line according to the readout duty cycles of the charging voltages corresponding to the grayscale levels will be displayed by the pixels on the nth scanning line;
• and
• a voltage selecting module, configured for selecting the charging voltages corresponding to the pixels on the nth scanning line according to the grayscale levels will be displayed by the pixels on the nth scanning line determined by the processing module and the driving voltage polarities of the pixels on the nth scanning line judged by the processing module, and for supplying the selected charging voltages corresponding to the pixels on the nth scanning line through the switching module to corresponding pixels on the nth scanning line.