IP Library Granted Patent US 7,339,645
Granted Patent B2
US 7,339,645 · App. 10/824,598 · Granted Mar 4, 2008

In-plane switching mode liquid crystal display device including field generating electrodes having a curved shape and method of fabricating the same

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Quick Facts
Patent No.
US 7,339,645
App. No.
10/824,598
Granted
Mar 4, 2008
Kind
B2
Abstract

A method of fabricating an in-plane switching mode liquid crystal display device includes: forming array elements on a first substrate, the array elements including field-generating electrodes having a curved shape; rubbing one of the first substrate and a second substrate in one direction, which can be any direction; and forming a liquid crystal layer between the first substrate and a second substrate such that at least a portion of the liquid crystal is oriented in the one direction.

Claims (32)

1. A method of fabricating an in-plane switching mode liquid crystal display device, comprising:

forming array elements on a first substrate, the array elements including field-generating electrodes having a curved shape;

rubbing one of the first substrate and a second substrate in one direction, which can be any direction; and

forming a liquid crystal layer between the first substrate and the second substrate such that at least a portion of the liquid crystal layer is oriented in the one direction,

wherein the first and second substrates have a rectangular shape having a long side and a short side, and the liquid crystal layer is oriented by the rubbing using a rubbing roll,

wherein the rubbing roll has a length corresponding to the short side,

wherein the field-generating electrodes include a common electrode and a pixel electrode spaced apart from each other, and a space between the common electrode and the pixel electrode has a ring shape, and

wherein the common electrode includes an outer common electrode pattern and an inner common electrode pattern, and wherein the pixel electrode includes a first pixel electrode pattern formed between the outer and inner common electrode patterns, a second pixel electrode pattern having a discal shape and located inside the inner common electrode pattern, and a pixel connecting line.

2. The method of claim 1 , wherein the rubbing includes moving the rubbing roll along a direction parallel to the long side.

3. The method of claim 1 , wherein the array elements include a gate line, a data line crossing the gate line and a thin film transistor connected to the gate line and the data line.

4. The method of claim 3 , wherein the one direction is one of 0°, 45°, 90°, 135°, 180°, 225°, 270° and 315° directions with respect to the gate line.

5. The method of claim 1 , wherein the first and second substrates include first and second cell regions having sizes different from each other and a dummy region, a plurality of first liquid crystal cells are formed in the first cell region and a plurality of second liquid crystal cells are formed in the second cell region such that the plurality of first liquid crystal cells and the plurality of second liquid crystal cells have a rectangular shape, wherein a longer side of each first liquid crystal cell is parallel to a first direction and a longer side of each second liquid crystal cell is parallel to one of the first direction and a second direction perpendicular to the first direction.

6. The method of claim 1 , further comprising:

forming a color filter layer on the second substrate;

attaching the first and second substrates such that the array elements face the color filter layer; and

cutting the attached first and second substrates.

7. An in-plane switching mode liquid crystal display device, comprising:

first and second substrates facing and spaced apart from each other, wherein one of the first and second substrates is rubbed using a rubbing roller in one direction, which can be any direction:

array elements including field-generating electrodes having a curved shape formed on the first substrate; and

a liquid crystal layer between the first substrate and the second substrate such that at least a portion of the liquid crystal is oriented in the one direction

wherein the first and second substrates include first and second cell regions having sizes different from each other and a dummy region, a plurality of first liquid crystal cells are formed in the first cell region and a plurality of second liquid crystal cells are formed in the second cell region such that the plurality of first liquid crystal cells and the plurality of second liquid crystal cells have a rectangular shape, wherein a longer side of each first liquid crystal cell is parallel to a first direction and a longer side of each second liquid crystal cell is parallel to one of the first direction and a second direction perpendicular to the first direction,

wherein the rubbung roller has a length corresponding to the second direction,

wherein the field-generating electrodes include a common electrode and a pixel electrode spaced apart from each other, and a space between the common electrode and the pixel electrode has a ring shape, and

wherein the common electrode includes an outer electrode pattern and an inner common electrode pattern, and wherein the pixel electrode includes a first pixel electrode pattern formed between the outer and inner common electrode pattern, and a pixel connecting line.

8. The device of claim 7 , wherein the array elements include a gate line, a data line crossing the gate line and a thin film transistor connected to the gate line and the data line.

9. The device of claim 8 , wherein the one direction is one of 0°, 45°, 90°, 135°, 180°, 225°, 270° and 315° directions with respect to the gate line.

10. The device of claim 8 , further comprising first and second polarizing plates outside the first and second substrates, respectively.

11. The device of claim 10 , wherein a first polarization axis of the first polarizing plate is perpendicular to the one orientation direction and a second polarization axis of the second polarizing plate is parallel to the one orientation direction.

12. The device of claim 7 , further comprising:

a color filter layer on the second substrate;

wherein the first and second substrates are attached such that the array elements face the color filter layer; and

wherein the attached first and second substrates are cut.

Assignments (2)
CHANGE OF NAME Recorded Oct 17, 2008
From: LG.PHILIPS LCD CO., LTD.
To: LG DISPLAY CO., LTD.
Reel/Frame 021763/0177 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Apr 15, 2004
From: LEE, YUN-BOK
To: LG.PHILIPS LCD CO., LTD.
Reel/Frame 015222/0991 →