IP Library Granted Patent US 7,307,678
Granted Patent B2
US 7,307,678 · App. 10/649,738 · Granted Dec 11, 2007

Liquid crystal display and fabricating method thereof

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Quick Facts
Patent No.
US 7,307,678
App. No.
10/649,738
Granted
Dec 11, 2007
Kind
B2
Abstract

A liquid crystal display includes a liquid crystal injected between upper and lower plates, wherein the upper and lower plates have electrodes respectively formed thereon, an upper alignment film formed on the upper plate and a lower alignment film formed on the lower plate, wherein only one of the alignment films on the upper plate and the lower plate is aligned in to determine an incipient alignment direction of the liquid crystal.

Claims (21)

1. A liquid crystal display, comprising:

a liquid crystal injected between upper and lower plates maintains a monostable state, wherein the upper and lower plates have electrodes respectively formed thereon;

an upper alignment film formed on the upper plate; and

a lower alignment film formed on the lower plate, wherein only one of the alignment films on the upper plate and the lower plate is aligned to determine an incipient alignment direction of the liquid crystal; and

polarizers mounted on external surfaces of the upper and lower plates respectively, wherein a tilted long axis of the liquid crystal is coincident with a transmission axis of at least one of the polarizers, wherein

the transmissive axis of at least one of the polarizers is at angle within a range of 9 to 10 degrees with respect to an alignment direction of the aligned one of the upper and lower alignment films, and

the liquid crystal is a ferroelectric liquid crystal of Half V-Switching mode.

2. The liquid crystal display according to claim 1 , wherein the upper alignment film is aligned.

3. The liquid crystal display according to claim 1 , wherein the lower alignment film is aligned.

4. The liquid crystal display according to claim 1 , wherein a cell gap between the upper plate and the lower plate is 1.4˜1.5 microns.

5. A fabricating method of a liquid crystal display, comprising the steps of:

printing alignment films on an upper plate and a lower plate respectively, wherein the upper and lower plates have electrodes respectively formed thereon;

aligning only one of the alignment film of the upper plate and the alignment film of the lower plate;

assembling the upper plate and the lower plate; and

injecting a liquid crystal between the joined upper and lower plates; and

mounting polarizers on external surfaces of the upper and lower plates respectively, wherein a long axis of the liquid crystal is coincident with a transmission axis of one of the polarizers, wherein

the transmissive axis of the one of the polarizers is at angle within a range of 9 to 10 degrees with respect to an alignment direction of the aligned alignment film, and

the liquid crystal is a ferroelectric liquid crystal of Half V-Switching mode.

6. The fabricating method of the liquid crystal display according to claim 5 , wherein the step of injecting includes injecting the liquid crystal while applying an alignment electric field.

7. The fabricating method of the liquid crystal display according to claim 5 , further comprising:

applying a DC Voltage to the liquid crystal while the liquid crystal is transmitting from a nematic phase to a smectic C phase, thereby maintaining a monostable state.

Assignments (2)
CHANGE OF NAME Recorded Jun 19, 2008
From: LG.PHILIPS LCD CO., LTD.
To: LG DISPLAY CO., LTD.
Reel/Frame 021147/0009 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 28, 2003
From: CHOI, SUK WON; KIM, HONG CHUL
To: LG.PHILIPS LCD CO., LTD.
Reel/Frame 014443/0807 →