Head-up displays and head-mount displays in the nature of optical projection units, rear-projection TVs, mobile phones, digital cameras, camcorders, laser scanning projectors, digital signage projectors, and projector modules in the nature of optical engines for use in head-up displays and head-mount displays in the nature of optical projection units, rear-projection TVs, mobile phones, digital cameras, camcorders, and laser scanning projectors and digital signage projectors