LCD televisions, or Liquid Crystal Display TVs, use liquid crystals sandwiched between two layers of glass to create images. These crystals change alignment when an electric current passes through them, allowing light to pass or be blocked, which forms the picture on the screen. LCD TVs are known for their slim design and energy efficiency compared to older CRT models. Most LCD TVs use a backlight, typically made of LEDs (Light Emitting Diodes), to illuminate the screen. This technology allows for vibrant colors and sharp images, making them popular for home entertainment. LCD TVs are widely available in various sizes and resolutions, catering to different viewing preferences.