Light diffusive sheet
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United States of America Patent
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Nov 8, 2005
Grant Date -
Aug 19, 2004
app pub date -
Jun 21, 2002
filing date -
Nov 22, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The invention provides a sheet (1) comprising a light-transmittable resin, in which irregularities are formed on both sides (1a) and (1b) of the sheet, the average surface roughness of one side (1a) which becomes the light-entering side is from 0.2 to 5.0 μm and larger than the average surface roughness of the opposite side (1b) that becomes the light-departing side, wherein the average surface roughness of the opposite side (1b) is from 0.2 to 2.0 μm, and the surface area ratio of the one side (1a) is smaller than the surface area ratio of the opposite side (1b).
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