Granted Patent B2

US 8,427,613 · App. 13/152,781 · Granted Apr 23, 2013

Inventors: Masuyuki Ohta (Mobara, JP); Kazuhiko Yanagawa (Mobara, JP); Kazuhiro Ogawa (Mobara, JP); Keiichiro Ashizawa (Mobara, JP); Masahiro Yanai (Mobara, JP); Nobutake Konishi (Mobara, JP); Katsumi Kondo (Hitachinaka, JP); Masahito Ohe (Mobara, JP); Sukekazu Aratani (Hitachi, JP); Hagen Klausmann (Hitachi, JP)

Assignees: Hitachi Displays, Ltd.; Panasonic Liquid Crystal Display Co., Ltd.

Abstract

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.

Priority Claims (3)

Continuity (8)