Laser illuminated backlight for liquid crystal displays
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United States of America Patent
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-
Dec 18, 2012
Grant Date -
Jul 22, 2010
app pub date -
Jan 15, 2010
filing date -
Jan 16, 2009
priority date (Note) -
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status (Latency Note)
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Abstract
A flat panel display includes a backlight with a plurality of lasing elements. A light distributor distributes light from the lasing elements across the flat panel display. In edge-lit backlights, the light distributor may be a light guide. In direct-lit backlights, the light distributor may be one or more light diffusers that randomize the polarization of light. A polarization enhancement film increases the polarization of light from the light distributor by allowing light of a first polarization to pass through the film and reflecting light that is not of the first polarization back into the backlight. The light reflected back into the backlight is randomly re-polarized within the backlight. An array of light modulators arranged across the flat panel display modulates light emitted by the backlight.
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