This document provides an overview of projector types, including their history, key technologies, advantages, and disadvantages. It discusses the main projector technologies: CRT, DLP, and LCD. CRT projectors were one of the earliest but had image distortion issues. DLP uses microscopic mirrors to reflect colored light for each pixel and has benefits like high contrast but can cause rainbow effects. LCD uses liquid crystal panels for each color and has benefits like sharper images at high resolutions, but has issues like low contrast over time. In conclusion, for best image quality a 3-chip DLP is recommended, but for static images LCD may be preferable due to its disadvantages appearing less. An understanding of both technologies is suggested before selecting