Liquid crystal display device

Abstract

A liquid crystal display device of the present invention includes a liquid crystal display panel, and a light diffusing layer which has first and second major surfaces and which is arranged such that the first major surface opposes a viewer side surface of the liquid crystal display panel. The light diffusing layer includes a first region formed of a first substance which has a first refractive index N1 and a plurality of second regions formed of a second substance which has a second refractive index N2 (<N1). The second regions are arranged in the first region at a predetermined pitch P in one direction in a plane parallel to the second major surface, each of the second regions forms interfaces with the first region, the interfaces being inclined by α° from a normal of the second major surface. θB which is expressed by θB=tan−1 (a/Lb) is not more than 1.7 arc minutes where Lb is a typical viewing distance, and a is expressed by a=tan θ′×Lt, in which θ′ is an angle of incidence that is obtained from α, N1, and N2, and Lt is a distance from the second major surface to a liquid crystal layer side surface of a viewer side substrate of the liquid crystal display panel. According to the present invention, the viewing angle characteristics of a direct-viewing type liquid crystal display device can be improved by using a light diffusing layer that utilizes total reflection.

Dependencies are inferred from the claim text.