Bryan Jones has taken close up images of the Apple Watch screen, magnified such it is possible to discern the individual pixels and sub-pixels. The images show the arrangements of red, green and blue light that make up the images users see on the Apple Watch Retina Display.
Jones compares the screen technology with that of iPhone screens (shown below). They look quite different likely due to the fact that Apple Watch uses an AMOLED display rather than a LCD. iPhone pixels are tightly packed together with the red, green and blue aligned vertically. With the Apple Watch, the blue sub-pixels act as spacers for the stacked red and green sub-pixels. Jones also notes that the imaging specs are a lot smaller than compared with an iPhone which seems to be in aid of maximising battery life. When zoomed in to this level, it means you can see a lot more black space. Jones says this contributes to the Apple Watch’s excellent contrast ratios.