Projection displays are devices that project images or videos onto a surface, typically a screen or wall. They work by using a light source, such as a lamp or laser, to illuminate a digital image created by a computer or video source. This technology is commonly used in classrooms, business presentations, and home theaters. There are various types of projection displays, including LCD, DLP, and LED projectors. Each type has its own advantages, such as brightness, color accuracy, and portability. Projection displays can create large images, making them ideal for group viewing and presentations, enhancing the overall visual experience.