Flat screen
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United States of America Patent
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-
Nov 24, 2009
Grant Date -
Jan 10, 2008
app pub date -
Mar 3, 2006
filing date -
Mar 10, 2005
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A flat screen comprises a liquid-crystal element, such as an LCD element, for representing an image. Further, a plurality of point light sources, such as LEDs, are provided. Between the point light sources and the liquid-crystal element a light-guiding element is arranged. For rendering the brightness distribution more uniform, the light-guiding element comprises at a surface thereof a plurality of diffractive surface elements arranged in cells.
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Cited Art Landscape
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