Patent ID: 6203160
Filing Date: 2001-03-20
Classification: G02B,H04N

Abstract:
A high efficiency liquid crystal display projection system comprising:a dichroic module comprising an optical disk and three primary-color filters formed on the optical disk, for sequentially separating a white light into three primary-color lights;a broadband polarizing beam-splitting device for respectively transmitting and reflecting p-polarized light and s-polarized light of the three primary-color lights;two fast time response liquid crystal light valves for receiving and reflecting respectively the p-polarized light and the s-polarized light of the three primary-color lights so that the p-polarized light is converted to s-polarized light and the s-polarized light is converted to p-polarized light; andprojection lenses for projecting the light beam to a screen after the s-polarized light and the p-polarized light reflected by the liquid crystal valves are respectively reflected and transmitted by the broadband polarizing beam-splitting device.