Liquid crystal display device with high response speed and method of manufacturing the same
View Patent ↗An in-plane switching liquid crystal display device is designed in such a way that an angle defined by the lengthwise direction of a common electrode and a pixel electrode and a rubbing direction of an alignment layer is set to 10 to 20°, a cell gap d is set to 2.7 μm or smaller, the dielectric anisotropy Δ∈ of a liquid crystal constituting a liquid crystal layer is set to 8 to 20, a white voltage V white to be applied to the pixel electrode when displaying white is set to 4 to 7 V, and the white voltage V white (V), the dielectric anisotropy Δ∈ of the liquid crystal, the cell gap d (μm) and an interval L (μm) between the common electrode and the pixel electrode satisfy the following expression 11.8 > V white d - 0.6 × L 0.5 × Δɛ - 0.5 > 9.8 .
1. A method of manufacturing a liquid crystal display device comprising the steps of:
providing an insulating layer on a first substrate, forming a common electrode and a pixel electrode in parallel to each other on said insulating layer, then forming a first alignment layer, subjected to an aligning treatment in a direction which forms an angle of 10 to 20° with a lengthwise direction of said pixel electrode and said common electrode, in such a way as to cover said insulating layer, said pixel electrode and said common electrode;
forming a second alignment layer, subjected to an aligning treatment in a direction which forms an angle of 10 to 20° with said lengthwise direction of said pixel electrode and said common electrode, on said second substrate; and
arranging said first substrate and said second substrate to face each other in such a way that a distance between said first alignment layer and said second alignment layer becomes equal to or less than 2.7 μm, and arranging a liquid crystal having a dielectric anisotropy of 8 to 20 between said first alignment layer and said second alignment layer,
wherein when a voltage of 4 to 7 V is applied to said pixel electrode at a time of displaying white, said voltage V white (V) to be applied to said pixel electrode when displaying white, said dielectric anisotropy Δ∈ of said liquid crystal, said distance d (μm) between said first alignment layer and said second alignment layer, and an interval L (μm) between said pixel electrode and said common electrode satisfy a following expression.
11.8
>
V
white
d
-
0.6
×
L
0.5
×
Δɛ
-
0.5
>
9.8
.
2. The method according to claim 1 , wherein said pixel electrode and said common electrode are formed by a transparent conductive layer.
3. The method according to claim 2 , wherein said transparent conductive layer is an indium-tin oxide layer.