Table of Contents (click to expand)Liquid CrystalsPixelsWhy Do LCD Screens Ripple? The reason LCD screens produce ripples when you put your finger on them is because you are essentially disturbing the alignment of the liquid crystals in those pixels. As a result, you see rainbow-colored ripples forming around the point where your fingers touch the screen, as the misaligned liquid crystals cause cells in the pixels to get confused about what colors they are supposed to display. To point out a location on a map or identify a person in a group photo to a friend, we invariably end up … Continue reading Why Do LCD Screens Produce Ripples When You Put Your Finger On Them?