Rear projection system

摘要

A method and apparatus for enhancing the contrast ratio of images generated on rear projection screens is disclosed. This invention provides a method of rejecting most of the scattered ambient light from both the front and the back of a rear projection screen. Polarizing films and retardation sheets are used to enhance the contrast and reject ambient light to decrease the dark state brightness in a rear projection system. Open systems where the screen is exposed as well as enclosed rear projection systems will benefit from this invention