Backlighting system using a retroreflecting polarizer
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United States of America Patent
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Jun 6, 1995
Grant Date -
N/A
app pub date -
May 18, 1992
filing date -
May 18, 1992
priority date (Note) -
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Abstract
A backlighting system employs a retroreflecting polarizer, comprising optical thin films coated on a structured material, to divide an incident beam of light into polarized components. One component is transmitted through the polarizer and the other is rejected. Optionally, a reflector (for example, a diffuser with a reflective layer) may be used; or, an absorbing polarizer may be added; or, a birefringent material may be included in the system.
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