A plasma display is a type of flat-panel screen used in televisions and computer monitors. It works by using small cells filled with gas that emit ultraviolet light when electrically charged. This light then excites phosphors on the screen, producing vibrant colors and images. Plasma displays are known for their excellent color accuracy and wide viewing angles. They were popular in the early 2000s but have largely been replaced by LCD and LED technologies due to their lower power consumption and thinner designs. Despite this, plasma displays are still appreciated for their deep blacks and rich contrast.