LCD (Liquid Crystal Display) is a type of technology used in many projection systems. It works on the principle of modulation of light by liquid crystals. These crystals allow or block the passage of light in a way that creates individual pixels on the screen. The result is an image created by the modulation of light, which allows LCD projectors to offer excellent contrast, bright and vivid colours and a wide viewing angle. This is why LCD projectors are popular in many different applications, from home theaters to office presentations and learning environments.