Array substrate, display device having the same, driving unit for driving the same and method of driving the same

A display device comprising:

• a display part having data lines, scan lines and pixels, each of the pixels being electrically connected to a corresponding one of the data lines and a corresponding one of the scan lines;
• a driving part outputting valid data signals that charge the pixels and an invalid data signal to the data lines;
• a scan driving part that generates scan signals corresponding to the valid data signals and an invalid scan signal corresponding to the invalid data signal to output the scan signals to the scan lines, the scan signals activating the scan lines corresponding to the valid data signals;
• and
• a controlling part to control the data driving part so that the data driving part outputs N valid data signals having a first polarity, an invalid data signal having a second polarity and N valid data signals having the second polarity to the data lines, in sequence, the second polarity being opposite to the first polarity with respect to a reference voltage.

A driving unit for driving a display device including a display part having data lines, scan lines and pixels electrically connected to the data and scan lines, the driving unit comprising:

• a driving part to output valid data signals that charge the pixels and an invalid data signal to the data lines;
• a scan driving part that generates scan signals corresponding to the valid data signals and an invalid scan signal corresponding to the invalid data signal to output the scan signals to the scan lines, the scan signals activating the scan lines corresponding to the valid data signals;
• and
• a controlling part to control the data driving part so that the data driving part outputs N valid data signals having a first polarity, an invalid data signal having a second polarity and N valid data signals having the second polarity to the data lines, in sequence, the second polarity being opposite to the first polarity with respect to a reference voltage.