Projection technology refers to the methods and devices used to display images or videos onto a surface, typically a screen or wall. This technology works by using light to project visual content, allowing for larger-than-life presentations in various settings, such as classrooms, theaters, and conferences. Common types of projectors include LCD, DLP, and LED projectors, each utilizing different techniques to create images. The applications of projection technology are vast, ranging from entertainment to education. In classrooms, it enhances learning by displaying educational materials, while in the entertainment industry, it is used for movies and live performances. Additionally, 3D projection mapping has emerged as a creative way to transform surfaces into dynamic displays, often seen in art installations and advertising.