Liquid crystal display device and method for designing the same

Details Liquid crystal display device and method for designing the same Liquid crystal display device and method for designing the same

2008-10-09

2010-10-12

Ullah, Akm E (Department: 2874)

Liquid crystal cells, elements and systems

Particular structure

Having significant detail of cell structure only

C349S194000

Reexamination Certificate

active

07812904

ABSTRACT:
A trans-reflective type In-Plane Switching (IPS)-LCD device capable of implementing a single gap and a wide viewing angle, and minimizing an occurrence area of disclination at an interface between a transmission region and a reflection region, and a method for designing the same. First and second alignment layers have characteristics to allow LC in a transmission region can be aligned in the same direction as a transmission axis of a lower polarizer. A third alignment layer is aligned so that the LC in the reflection region can be twisted from a lower side to an upper side with a predetermined twisted angle (θ). Here, the twisted angle (θ) of the LC in the reflection region, and an angle (α) between an alignment direction of an uppermost LC in the reflection region and the transmission axis of the upper polarizer are set so that optical reflectivity in the reflection region is ‘0’ when the LC is not driven.

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