IP Library Granted Patent US 6,867,835
Granted Patent B2
US 6,867,835 · App. 09/938,607 · Granted Mar 15, 2005

In-plane switching LCD panel having different alignment layers

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Quick Facts
Patent No.
US 6,867,835
App. No.
09/938,607
Granted
Mar 15, 2005
Kind
B2
Abstract

The present invention discloses an IPS LCD device including a first and second substrate opposing with each other, a common electrode on an inner surface of the first substrate, a pixel electrode parallel to the common electrode, a first alignment layer covering the common and pixel electrodes, wherein the first alignment layer is rubbed, a second alignment layer on an inner surface of the upper substrate, wherein the second alignment layer is photo-aligned, and a liquid crystal layer between the first and second substrates.

Claims (12)

1. An IPS LCD device comprising:

first and second substrates opposing with each other;

a common electrode on an inner surface of the first substrate;

a pixel electrode parallel to the common electrode on the inner surface of the first substrate;

first and second alignment layers, thea first alignment layer covering the common and pixel electrodes, wherein the first alignment layer is rubbed, the second alignment layer being disposed on an inner surface of the upper substrate, wherein the second alignment layer is photo-aligned, the first alignment layer having an anchoring energy greater than an anchoring energy of the second alignment layer; and

a liquid crystal layer between the first and second substrates.

2. The device of claim 1 , wherein the second alignment layer includes a photo-sensitive material.

3. The device of claim 2 , wherein the second alignment layer is a photolysis type polymer.

4. The device of claim 2 , wherein the second alignment layer is a photo-crosslinkable polymer.

5. The device of claim 1 , wherein a dichroic subtraction of the second alignment layer is larger than 0.025 inclusive.

6. The device of claim 1 , wherein a surface of the second alignment layer has a pencil hardness of 1H to 5H both inclusive.

7. The device of claim 1 wherein liquid crystal molecules of the liquid crystal layer are at an angle of 0 degrees exclusive to 3 degrees inclusive with respect to the first and second alignment layers.

Assignments (2)
CHANGE OF NAME Recorded May 21, 2008
From: LG.PHILIPS LCD CO., LTD.
To: LG DISPLAY CO., LTD.
Reel/Frame 020985/0675 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Aug 27, 2001
From: LEE, BYUNG-HYUN; CHOI, YOUNG-SUK
To: LG.PHILIPS LCD CO., LTD.
Reel/Frame 012121/0657 →