Screen types refer to the various technologies used in display devices, such as televisions, computer monitors, and smartphones. Common types include LCD (Liquid Crystal Display), which uses liquid crystals and a backlight to produce images, and LED (Light Emitting Diode), a more energy-efficient version of LCD that uses LEDs for backlighting. Another popular type is OLED (Organic Light Emitting Diode), which offers better contrast and color accuracy by using organic compounds that emit light. Additionally, Plasma screens were once popular for large televisions, providing deep blacks and vibrant colors, but have largely been replaced by newer technologies. CRT (Cathode Ray Tube) screens are now considered outdated, as they were bulky and heavy compared to modern flat-screen options. Each screen type has its own advantages and disadvantages, making them suitable for different applications and user preferences.