Polarization splitting backlight module
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United States of America Patent
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Oct 7, 2003
Grant Date -
Oct 25, 2001
app pub date -
Nov 30, 2000
filing date -
Dec 31, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A polarization splitting backlight module for efficiently emitting polarized light beams is disclosed. The polarization splitting backlight module of the present invention comprises a light source, an under plate, a substrate, a phase retardation reflective film, a scattering structure, a thin film and an upper cover. The light beams emitted from the non-polarized light source are introduced into the substrate, and after scattering, reflection, phase retardation and polarization splitting, the light beams will pass through the upper cover being of a single polarization state so as to be utilized by electro-optical systems, such as liquid crystal displays. The present invention converts light beams into a single polarization state, and thereby the efficiency of polarization splitting, as well as the brightness, are higher than that of a conventional backlight module.
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