Thus, the image is pixels tall and 1, pixels wide. The more pixels there are in an image, the better. What is Multi-Touch Technology? More pixels in a given area also allow for an image to contain little to no visible pixels — this is known as a "retina display. Additionally, a p retina display can be physically larger than a p retina display, as there are more total pixels. If you are uncertain of a display's image resolution based on the product description, look at the specifications to determine the actual image size. Full HD refers to p image resolution.