Patent ID: 8749733
Filing Date: 2014-06-10
Classification: G02B,G02F

Abstract:
1. A liquid crystal display device comprising: a light source; a liquid crystal display panel for modulating light from the light source for picture display, the liquid crystal display panel having a liquid crystal layer and a pair of polarizing plates; and an optical filter provided between the light source and the liquid crystal display panel and configured to change a hue of light entering the liquid crystal display panel in an oblique direction to a display surface to compensate a hue change in the liquid crystal display panel, wherein the liquid crystal display panel is configured such that, when the liquid crystal display panel is in a black display mode without using the optical filter, leakage light from the liquid crystal display panel in the oblique direction has a hue having a local minimum value in a wavelength range from 450 nm to 550 nm both inclusive, wherein the optical filter is configured such that normal incident light entering into the liquid crystal display panel in a normal direction through the optical filter has a hue same as that of light before passing through the optical filter, and oblique incident light entering into the liquid crystal display panel in an oblique direction through the optical filter has a hue having a local maximum value in a wavelength range from 400 nm to less than 550 nm, wherein the optical filter comprises a color correction filter having a coloring layer and a reflective layer, the coloring layer comprising a plurality of rectangular unit coloring layers provided on a surface of a transparent base, the reflective layer having a plurality of circular unit reflective layers provided on an opposite surface of the transparent base, and each of the plurality of rectangular unit coloring layers corresponding to one of the plurality of circular unit reflective layers, wherein each of the pair of polarizing plates comprises a phase difference layer and is configured to adjust a phase difference of the phase difference layer to adjust the local minimum value of leakage light, and wherein each phase difference layer comprises a bidirectional phase-difference film, wherein for each film, a refractive index in the x-axis direction (n