Patent ID: 6781640
Filing Date: 2004-08-24
Classification: G02F,H04N

Abstract:
A projection display system, comprising:(a) a light source; (b) at least one polarizer for polarizing light from said light source; (c) at least one liquid crystal panel for generating an image, and which together with said polarizer, acts to polarize light from said light source generally into a uniaxial orientation; (d) a projection source for projecting said image; (e) a polarization compensator having a plurality of light transmitting regions each having an incident face for receiving incident light and each having a respective birefringence, where said birefringence of each respective region is based on the variance of the polarization of said incident light on the incident face of said respective region from said uniaxial orientation, where said birefringence reduces said variance, and where said birefringence of at least one of said regions is different than said birefringence of another of said regions; (f) wherein said polarization compensator is located substantially coincident with where the angular distribution of the light is directly related to its physical location within said projection display system.