Backlighting light pipe for illuminating a flat-panel display
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United States of America Patent
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Oct 3, 2006
Grant Date -
N/A
app pub date -
Dec 29, 1999
filing date -
Dec 30, 1998
priority date (Note) -
In Force
status (Latency Note)
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Abstract
The invention relates to a new light pipe (313) for providing backlighting (312) of a flat-panel display (311) by means of at least one light source so that the light pipe has at least one surface which comprises patterns. The patterns have diffraction properties for conducting the light in the direction of the display, and the patterns comprise uniform, mutually different areas having a certain distribution on the surface of the light pipe. The local outcoupling efficiency of the light pipe depends on the characteristic properties of the patterns, which are dependent on the distance to the light source or its wavelength.
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