Optical film having improved optical performance, and backlight unit comprising the same
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United States of America Patent
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Sep 15, 2015
Grant Date -
May 16, 2013
app pub date -
Jul 14, 2011
filing date -
Jul 15, 2010
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Abstract
The present invention relates to an optical film having improved optical performance and to a backlight unit comprising the same. More particularly, the present invention relates to a microlens array (MLA) sheet which comprises a base unit and a lens unit formed on one side of the base unit, wherein the lens unit consists of a plurality of conical lenses. Existing hemispherical microlens array sheets have limitations in terms of improving luminance, and therefore cannot replace prism sheets in high luminance product s. However, the microlens array sheet consisting of conical lenses of the present invention can improve both luminance and viewing angle characteristics.
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