Backlight module for electro-optical display
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Issued Date -
Sep 5, 2002
app pub date -
Sep 7, 2001
filing date -
Oct 5, 2000
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
An electro-optical display backlight module for generating a light source of a single polarization state, which reduces the optical loss in light beam output, is suitable for mass production, and decreases manufacturing costs, is disclosed. The backlight module is easily integrated with conventional electro-optical display devices and achieves high-quality polarization splitting through suitable designs. The backlight module of the present invention comprises an under plate having a ridged lower surface and an upper surface; a phase retardation film of high reflectivity disposed on the lower surface of the under plate; a double-sided electroluminescent panel having a lower surface, substantially complementary to the upper surface and facing therewith, and an upper surface; a substrate having a lower surface, substantially complementary to the upper surface of the double-sided electroluminescent panel and facing therewith, and an upper surface; and a polarization splitting film disposed on the upper surface of the substrate, providing transmission of predetermined polarization state and reflection of predetermined polarization state of the light source.
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