Method for testing touch display panel

A method for displaying an image on a touch display panel, the touch display panel comprising a substrate and a plurality of subpixels disposed on the substrate, each of the subpixels comprising a pixel electrode and a common electrode, the common electrodes of X number of subpixels being electrically connected to form a touch sensing electrode, X being an integer greater than or equal to 2, and the method comprising:

• dividing a frame period of the image into a first subframe period and a second subframe period;
• transmitting pixel data to some of the X number of subpixels in the first subframe period, wherein the number of the subpixels receiving pixel data of positive polarity in the some of the X number of subpixels subtracted by the number of the subpixels receiving pixel data of negative polarity in the some of the X number of subpixels is defined as a first polarity number difference;
• and
• transmitting pixel data to others of the X number of subpixels in the second subframe period, wherein the number of the subpixels receiving pixel data of positive polarity in the others of the X number of subpixels subtracted by the number of the subpixels receiving pixel data of negative polarity in the others of the X number of subpixels is defined as a second polarity number difference;
• wherein a sum of the first polarity number difference and the second polarity number difference is 0.