Abstract: Considering the color aliasing caused by down-sampling in display systems, a novel color anti-aliasing filtering method based on the subpixel arrangements of displays is proposed. Due to the shape and the area of color aliasing are closely related with the diversity of arrangements, the Nyquist limits of different primary colors within various arrangements are obtained in frequency domain by reciprocal lattice theory, and the anti-aliasing filters applied to different primary colors are designed. To suppress color aliasing efficiently while keeping more original image details, the images are reconstructed and displayed through subpixel sampling after preprocessed by them. Analysis and experiments show that when the clarity of display images is measured by the PSNR at the luminance component, the method proposed in this paper can increase the PSNR nearly 30% than 5-tap filtering. At the same time, the method is simple and easy to implement.