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The disclosed invention shows: 1. A cell structure with a compensation film to spread the viewing-cone, and 2. A compensation film which is a negative uniaxis anisotropy.
English (United States)
This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately
91% of the total text.
Cell Structure of Thin Film Transistor-Liquid Crystal
Compensator to Spread Viewing-Cone
A cell structure with a compensation film to spread the
A compensation film which is a negative uniaxis anisotropy.
When it is applied on a TN-Liquid Crystal Display (LCD)
adequate direction, it shows some advantage other than ordinary
TN-LCD, such as a darker black state, wide no-grey-inversion angle.
compensation films are used for Standard (STN)-LCD,
but not for TN-TFT-LCD. Also, an
absorption axis of
polarizer/analyzer is parallel or perpendicular to the LC alignment
direction (rubbing direction) for O-mode and E-mode respectively, as
shown in Fig. 1.
When compensation films on each side of an
LCD cell are used,
and a polarizer and an analyzer are used without using neither
parallel direction nor perpendicular direction to LC alignment
direction, as shown in Fig. 2, a darker black-state is obtained, as
shown in Fig. 3. Also, a wider viewing
angle in no-grey-inversion,
as shown in Fig. 4, is obtained.
when the conditions below are held, much advantage
in the viewing-cone would be received:
Absorption axis of polarizer/analyzer is 45º from LC
alignment direction, as shown in
Compensation film is made of a discotic liquid crystal having
the nature of negative uniaxis