Lighting panel device for illumination of an object
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United States of America Patent
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-
Mar 1, 2005
Grant Date -
Feb 13, 2003
app pub date -
Aug 9, 2002
filing date -
Aug 13, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A lighting panel device has a light source, a lighting panel receiving light from the light source at an end face, and a prism sheet provided above the lighting panel. The lighting panel has a bottom reflector face, and the prism sheet has a plurality of prisms arranged in a longitudinal direction of the prism sheet. Each of the prisms has a sectional shape of a triangle. A vertex of the triangle is between 30.degree. and 25.degree..
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