Patent ID: 6025897
Filing Date: 2000-02-15
Classification: A47J,B29C,B29D,B29K,B32B,G02B,G02F

Abstract:
A display comprising:a light source having a reflective optical cavity configured to randomize direction and polarization of light reflected by the optical cavity;a display module;a geometric structured surface material disposed between the light source and the display module, the structure surface material redirecting a portion of light incident on the structured surface material from an incidence angle to a transmission angle, the transmission angle being less than the incidence angle measured from an axis normal to the plane of the display module;a reflective polarizer disposed between the light source and the display module, the reflective polarizer having a birefringent material arranged such that light of a first polarization encounters changes in refractive indices, as the light of the first polarization propagates in the reflective polarizer, sufficient to reflect the light of the first polarization toward the optical cavity, while light of a second polarization is substantially transmitted through the reflective polarizer toward the display; andan absorbing polarizer disposed between the reflective polarizer and the display module.