Patent ID: 8817208
Filing Date: 2014-08-26
Classification: G02B,G02F

Abstract:
1. A display apparatus, comprising: a liquid crystal display device comprising: a backlight module; and a liquid crystal panel comprising a first substrate, a second substrate and a liquid crystal layer, wherein the liquid crystal layer is disposed between the first substrate and the second substrate; a first polarizer disposed on the first substrate; a second polarizer disposed between the second substrate and the backlight module, wherein polarizing directions of the first polarizer and the second polarizer have different azimuth angles; and a diffractive optical element disposed on a light emitting side of the first polarizer and having a first diffraction grating and a second diffraction grating, wherein grating directions of the first diffraction grating and the second diffraction grating have different azimuth angles, an included angle from the grating direction of the first diffraction grating to the polarizing direction of the first polarizer is 0±20 degrees, and an included angle from the grating direction of the second diffraction grating to the polarizing direction of the first polarizer is 90±20 degrees.