Scan method for displaying image

A scan method for displaying image, wherein a display panel has N gate lines to display an image, N≧4, and the image is displayed by dot inversion or line inversion, the scan method comprising:

• displaying a first image frame group by a first scan sequence, the first image frame group having a plurality of first image frames, each of the first image frames having a plurality of first gate-line groups in relative darkness and a plurality of second gate-line groups in relative brightness, and the first gate-line groups and the second gate-line groups are alternately displayed;
• just after the first image frame group, displaying a second image frame group by a second scan sequence, the second image frame group having a plurality of second image frames, each of the second image frames having a plurality of third gate-line groups in relative darkness and a plurality of fourth gate-line groups in relative brightness, and the third gate-line groups and the fourth gate-line groups are alternately displayed,
• wherein the first and second gate-line groups of the first image frames are complementary to the third and fourth gate-line groups of the second image frames,
• wherein a quantity of the second image frames of the second image frame group is equal to a quantity of the first image frames of the first image frame group;
• and
• cycling the first scan sequence and the second scan sequence,
• wherein the first gate-line groups and the third gate-line groups of the first image frames and the second image frames are relatively dark due to a plurality of pixels therein with insufficient charge.