IP Library › Granted Patent US 8,427,613
Granted Patent B2
US 8,427,613 · App. 13/152,781 · Granted Apr 23, 2013

In-plane field type liquid crystal display device comprising liquid crystal molecules with more than two kinds of reorientation directions

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Quick Facts
Patent No.
US 8,427,613
App. No.
13/152,781
Granted
Apr 23, 2013
Kind
B2
Abstract

A liquid crystal display device includes a first substrate, a second substrate, a liquid crystal layer sandwiched between the first and second substrates, and an orientation film formed on the first substrate. The orientation film has two orientation regions in a pixel, and the orientation regions are formed by polarized light.

Claims (13)

1. A liquid crystal display device comprising:

a first substrate;

a pixel electrode and a counter electrode being formed over the first substrate;

a first orientation film formed over the pixel electrode and the counter electrode on the first substrate, the first orientation film being responsive to a radiated polarized light so as to obtain an initial orientation direction thereof;

a second substrate opposed to the first substrate;

a second orientation film formed over the second substrate; and

a liquid crystal sealed between the first substrate and the second substrate;

wherein the liquid crystal is driven by an electric field generated by the pixel electrode and the counter electrode formed over the first substrate;

wherein the first and second orientation films are made of polyimide;

wherein the liquid crystal has a negative dielectric anisotropy;

wherein the liquid crystal display device is normally in a black mode; and

wherein an angle formed between the electric field and the initial orientation direction of the first orientation film in accordance with the radiated polarized light is in a range of greater than 0° to 45° and 145° to less than 180°.

2. The liquid crystal display device according to claim 1 , wherein the radiated polarized light is radiated a polarized light beam radiated as a laser beam.