When it comes to smartphone displays, there are two main types that are utilized; the first of which is LCD. LCD stands for Liquid Crystal Display, and while I'm not going to go into the complex designs of LCD panel circuits and exactly how they work, I'll explain the different parts of an LCD display and exactly what the crystals do. There are four main layers to an LCD panel: there's the outer protective layer, the polarizing layer (or layers), the liquid crystal layer and the backlight. The outer protective layer is basically there to protect the other components from getting damaged, and it's usually made of clear plastic or glass. The polarizing layers help the crystal layer deliver the correct light, or no light when off or black, to your eyes. The most important part is the liquid crystal layer, which is what controls the colors passed through and ultimately the picture displayed. When an electrical current is passed through the crystalline lay...