OPTICAL ELEMENT AND POLARIZING PLATE HAVING THE SAME, AND LIQUID CRYSTAL DISPLAY DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an optical element that can suppress changes in colors or gradation depending on viewing angles, and to provide a polarizing plate having the optical element, and a liquid crystal display device.

SOLUTION: The optical element 10 comprises a plastic base film 8 and a diffusion layer 9, wherein the diffusion layer 9 has an internal scattering body 12 that selectively scatters light at a short wavelength and is specified to have pencil hardness of 2H or higher at 500 g load. When the optical element is used as disposed in the front face A1 side of a liquid crystal display device, a color difference Δu'v' defined below upon displaying colors near eight test colors specified as the test colors by CIE1974 is specified to 0.05 or less: the color difference is obtained from the chromaticity coordinates (u0', v0') of CIE1976UCS observed from an opposing position straight to the front face A1 of the liquid crystal display device and the chromaticity coordinates (u', v') observed at an observation angle θ changed by ±60° in the horizontal or vertical direction from the above position.

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