Optical film and lighting device comprising the same
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United States of America Patent
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Jul 15, 2014
Grant Date -
Feb 24, 2011
app pub date -
May 4, 2010
filing date -
Nov 6, 2007
priority date (Note) -
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Abstract
An optical film is formed with a plurality of optical patterns having peak and valley portions and a lighting device may include such an optical film. Pitches of the optical patterns, heights of the peak portions and depths of the valley portions are irregular, and plan and side structures of the optical patterns have a non-linear non-symmetrical arrangement structure in which the peak and valley portions are irregularly bent. According to an optical film and a lighting device including such an optical film, a moiré phenomenon can be prevented in advance, abrasion resistance can be improved, optical defects such as scratches cannot be observed with the naked eye, a wet-out phenomenon can be prevented, and a viewing angle can be broadened.
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