Multilayered optical film, manufacturing method thereof, and display device
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United States of America Patent
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Mar 20, 2018
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app pub date -
May 10, 2013
filing date -
May 10, 2012
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Abstract
An optical film includes: a polarization layer; a first phase retardation layer having an optic axis at an angle in a range from about 17 degrees to about 27 degrees or from about −27 degrees to about −17 degrees with respect to a transmission axis of the polarization layer; and a second phase retardation layer having an optic axis at an angle in a range from about 85 degrees to about 95 degrees with respect to the transmission axis of the polarization layer. The polarization layer, the first phase retardation layer, and the second phase retardation layer are deposited in sequence, the first phase retardation layer is a half-wave plate, the second phase retardation layer is a quarter-wave plate, and out-of-plane retardation values of the first phase retardation layer and the second phase retardation layer for incident light having the standard wavelength have opposite signs.
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