Phosphor coating is a layer of phosphorescent material applied to surfaces, commonly used in devices like fluorescent lamps and LED screens. This coating absorbs energy, usually from ultraviolet light, and re-emits it as visible light, enhancing brightness and color quality. In television screens and computer monitors, phosphor coatings help produce vibrant images by converting electrical energy into light. The specific composition of the phosphor determines the color emitted, making it essential for achieving accurate color reproduction in various display technologies.