Displaying method and display with subpixel rendering

A display comprising:

• a display panel comprising:
• a plurality of first pixel units, wherein each of the first pixel units comprises a white subpixel;
• and
• a plurality of second pixel units;
• an image converting module configured to convert first image data into second image data;
• a processing module electrically connected to the image converting module, and configured to perform subpixel rendering on the second image data corresponding to the first pixel units and the second pixel units, thereby generating third image data;
• and
• a controlling module electrically connected to the processing module and the display panel, and configured to determine whether the first image data comprises first pixel data having a gray brightness value which is not greater than a first threshold,
• if the first image data comprises the first pixel data having the gray brightness value which is not greater than the first threshold, the controlling module determines whether a gray brightness value of second pixel data in the third image data corresponding to the first pixel data is greater than a second threshold,
• if the gray brightness value of the second pixel data is greater than the second threshold, the controlling module converts the third image data into fourth image data, and transmits the fourth image data to the display panel for displaying,
• wherein the second pixel data is corresponding to third pixel data in the fourth image data, and the third pixel data comprises at least one first subpixel data, and a gray brightness value of the at least one first subpixel data is smaller than a gray brightness value of subpixel data in the third image data corresponding to the at least one first subpixel data, and a gray brightness value of at least one second subpixel data in the fourth image data is greater than a gray brightness value of subpixel data in the third image data corresponding to the at least one second subpixel data.