Patent ID: 7295265
Filing Date: 2007-11-13
Classification: G02F

Abstract:
1. A liquid crystal display device having variable viewing angles, comprising: a first liquid crystal cell having first and second substrates spaced apart from and facing each other, a pixel electrode on an inner surface of the first substrate, a common electrode on an inner surface of the second substrate, and a first liquid crystal layer interposed between the pixel electrode and the common electrode; a second liquid crystal cell on the first liquid crystal cell, the second liquid crystal cell having third and fourth substrates spaced apart from and facing each other and a second liquid crystal layer interposed between the third and fourth substrates, wherein the second liquid crystal layer includes discotic liquid crystal having an initial alignment of molecules of the second liquid crystal layer to diffuse light transmitted through the first liquid crystal cell over a first viewing angle; and a switching part that selectively applies an electric field to the second liquid crystal layer that aligns the molecules of the second liquid crystal layer to diffuse light transmitted from the first liquid crystal cell over a second viewing angle smaller than the first viewing angle.