LCD displays, or Liquid Crystal Displays, are flat-panel screens commonly used in televisions, computer monitors, and smartphones. They work by using liquid crystals that change alignment when an electric current is applied, allowing light to pass through or be blocked. This process creates images by controlling the intensity and color of the light. These displays are known for their energy efficiency and slim design compared to older technologies like CRT (Cathode Ray Tube) displays. LCDs provide clear images and are widely used in various devices due to their ability to produce vibrant colors and sharp details.