Patent ID: 6497492
Filing Date: 2002-12-24
Classification: G02B

Abstract:
Back-lighting system comprising:a source of light; a reflector for redirecting light from said source towards the direction of light emitted by said source away from said reflector; a single thin reflective linear polarizing element receiving both light emitted by said source and light redirected by said reflector, said reflective linear polarizing element passing light linearly polarized in a given optic axis and reflecting light not polarized in said given optic axis, said single thin reflective linear polarizing element (being a prepolarization and polarization return means) giving a one direction oriented linear polarization; a waveguide for guiding light passed by said reflective linear polarizing element towards an electro-optic modulator, said waveguide and said thin reflective linear polarizing element being oriented for maintaining substantially the same polarization of said light passed by said thin reflective linear-polarizing element and guided by said waveguide.