Light panel
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United States of America Patent
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Jul 21, 2009
Grant Date -
Aug 12, 2004
app pub date -
Jun 17, 2003
filing date -
May 28, 1999
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
The invention relates to a light panel, comprising a light source (1) and a panel element (2). The panel element is manufactured from a substantially transparent material for transmitting light thereby. The panel element (2) is further configured as a waveguide panel, inside which the light beams propagate with total reflection and get outcoupled therefrom with a diffractive outcoupling system. An outcoupling system (2u), such as a grating structure or the like, is adapted to cover the entire panel element (2) as far as its light surface (2a) is concerned, such that divergent recesses and/or grooves of various sizes and/or shapes are used to produce divergent local gratings of various sizes and/or shapes, such as multi-shaped and/or binary pixels and/or units, having the filing factor, shape, profile and/or size thereof optimized in such a way that the diffraction efficiency is a function of place.
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Cited Art Landscape
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