Ink jet printing apparatus and ink jet printing method

摘要

One pixel is sub-divided on the basis of ejection ports. Pixel pattern are provided at respective quantization levels, each of which are defined using dots having different sizes. Image data is processed using a pixel pattern selected according to the type of printing medium and image quality to be achieved, and printing is performed using the image data. Only ejection ports ejecting ink droplets in the same size are driven at the same timing for ejection.