Backlighting lightpipes for display applications
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United States of America Patent
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Mar 9, 1999
Grant Date -
N/A
app pub date -
Mar 11, 1997
filing date -
Mar 11, 1997
priority date (Note) -
Expired
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Abstract
This invention discloses improved lightpipes for backlighting applications in liquid crystal display devices. The lightpipes comprise transparent polymers with scattering centers. A preferred composition for such lightpipes comprises a cycloolefin polymer containing scattering centers from suitable elastomers and inorganic fillers. The inventive lightpipes offer superior scattering efficiency as well as spatial uniformity of scattering and uniformity of scattering across a wide wavelength range.
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