LIQUID CRYSTAL DISPLAY DEVICE

摘要

A VA-mode liquid crystal display device of four domains or less that causes less whitening and tinting, includes: a first polarizing film, a first retardation layer, a second retardation layer, a liquid crystal layer, a third retardation layer, a fourth retardation layer, and a second polarizing film, in sequence. The liquid crystal layer is in a vertical alignment mode (VA mode) under no voltage application. The first to fourth retardation layers each have a predetermined retardation. The absorption axis of the first polarizing film is orthogonal to that of the second polarizing film. The slow axis of the first retardation layer defines an angle of 45° from the absorption axis of the first polarizing film, and is parallel to the in-plane slow axis of the liquid crystal layer under voltage application. The slow axis of the first retardation layer is orthogonal to that of the fourth retardation layer.

主权项

1. A liquid crystal display device comprising: a first polarizing film; a first retardation layer; a second retardation layer; a liquid crystal layer; a third retardation layer; a fourth retardation layer; and a second polarizing film, in sequence, wherein
the liquid crystal layer has four domains or less, and is in a vertical alignment mode (VA mode) under no voltage application, the first and fourth retardation layers each have an in-plane retardation Re (550) of 25 to 125 nm at a wavelength of 550 nm, and have a thickness retardation Rth (550) of 12.5 to 62.5 nm at a wavelength of 550 nm, the absolute value of a retardation Re (550) of the second retardation layer is not larger than 10 nm, while a retardation Rth (550) of the second retardation layer is −200 to −100 nm, the absolute value of a retardation Re (550) of the third retardation layer is not larger than 10 nm, while a retardation Rth (550) of the third retardation layer is 300 to 400 nm, an absorption axis of the first polarizing film is orthogonal to an absorption axis of the second polarizing film, a slow axis of the first retardation layer defines an angle of 45° from the absorption axis of the first polarizing film, and is parallel to an in-plane slow axis of the liquid crystal layer under voltage application, the slow axis of the first retardation layer is orthogonal to a slow axis of the fourth retardation layer, and a product Δn·d of the refractive-index anisotropy Δn and the thickness d (μm) of the liquid crystal layer is 250 to 450 nm.