Optical sheet and edge-lit backlight unit
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United States of America Patent
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Nov 21, 2017
Issued Date -
N/A
app pub date -
Jul 8, 2015
filing date -
Jul 9, 2014
priority date (Note) -
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status (Latency Note)
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Abstract
An optical sheet includes: a transparent substrate sheet; and a sticking preventive portion provided on the back face of the transparent substrate sheet. The sticking preventive portion includes a plurality of printed dots. The average diameter of the printed dots is preferably no less than 1 μm and no greater than 200 μm. The ratio of the average height to the average diameter of the printed dots is preferably no less than 1/100 and no greater than 1. The printed dot preferably has a hemisphere-like shape having a height less than a diameter. The arrangement density of the printed dots on the back face of the substrate sheet is preferably no less than 10 dots/mm2 and no greater than 2,500 dots/mm2. A principal component of the printed dots is preferably is preferably an acrylic resin, a urethane resin or an acrylic urethane resin.
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