Liquid crystal display device and method of manufacturing the same

Patent metadata

Field	Value
Publication number	US-9659965-B2
Application number	US-201514656003-A
Country	US
Kind code	B2
Filing date	Mar 12, 2015
Priority date	Sep 12, 2014
Publication date	May 23, 2017
Grant date	May 23, 2017

Abstract

A liquid crystal display (LCD) device comprises a first substrate, a second substrate disposed to face the first substrate, a liquid crystal layer which is disposed between the first substrate and the second substrate and which includes multiple liquid crystal molecules, and a self-alignment layer formed between the first substrate and the liquid crystal layer, the self-alignment layer comprising a vertical alignment additive having a molecular structure having a hydrophilic group and a polymerized group formed in both ends of a core molecule, wherein a major axis of the vertical alignment additive is at an angle less than about 90° with respect to a surface of the first substrate.

First claim

What is claimed is:

1. A liquid crystal display (LCD) device, comprising:
a first substrate;
a second substrate disposed to face the first substrate;
a liquid crystal layer which is disposed between the first substrate and the second substrate and includes multiple liquid crystal molecules; and
a self-alignment layer formed between the first substrate and the liquid crystal layer, the self-alignment layer comprising a vertical alignment additive having a molecular structure having a hydrophilic group formed in an end of a core molecule, wherein the hydrophilic group faces a surface of the first substrate and a major axis of the core molecule is at an angle less than about 90° with respect to the surface of the first substrate.

2. The LCD device of claim 1 , wherein a polymerized group is further formed in the other end of the core molecule.

3. The LCD device of claim 1 , wherein the core molecule is formed of one of biphenyl of a mesogenic unit, a plurality of benzenes, and a cyclohexane ring.

4. The LCD device of claim 1 , wherein an alignment layer is formed between the second substrate and the liquid crystal layer.

5. The LCD device of claim 4 , wherein a difference between an angle between a major axis of liquid crystal molecules contacting the self-alignment layer and the surface of the first substrate and an angle between a major axis of liquid crystal molecules contacting the alignment layer and a surface of the second substrate is greater than about 0.5°.

6. The LCD device of claim 5 , wherein a polymerized group is further formed in the other end of the core molecule.

7. The LCD device of claim 4 , wherein an angle between a major axis of a liquid crystal molecules contacting the self-alignment layer and the surface of the first substrate is greater than about 85° and less than about 89.5°.

8. The LCD device of claim 1 , wherein the surface of the first substrate contacts the self-alignment layer and is in a hydrophilic-treated state.

9. The LCD device of claim 1 , wherein a nitride silicon layer is further formed between the first substrate and the self-alignment layer.

10. The LCD device of claim 1 , wherein a color filter is formed on one of the first substrate and the second substrate, and a thin film transistor (TFT) array layer is formed on another of the first substrate and the second substrate.

11. The LCD device of claim 1 , wherein a color filter and a TFT array layer are formed on one of the first substrate and the second substrate.

12. The LCD device of claim 1 , wherein the first substrate and the second substrate are bent to form a curved display surface.

13. The LCD device of claim 1 , further comprised of:
a liquid crystal mixture comprised of multiple liquid crystal molecules mixed with an additive formed of multiple molecules having a hydrophilic group formed in an end of a core molecule; and
an amount of the additive included in the liquid crystal mixture forming the liquid crystal layer is about 0.001% to about 0.5%.

14. The LCD device of claim 1 , wherein the liquid crystal mixture forming the liquid crystal layer further comprises one of alkenyl single and alkoxy single.

15. The LCD device of claim 1 , further comprising:
a color filter formed on the first substrate; and
a thin film transistor (TFT) array layer formed on the second substrate.

16. The LCD device of claim 1 further comprised of, a thin film transistor (TFT) array layer and a color filter formed on the second substrate.

17. The LCD device of claim 1 , further comprised of the first substrate and the second substrate bending to form a curved display surface.

Assignees

• Samsung Display Co Ltd

Inventors

• Park Heungshik
• Bae Jihong
• Kwon Ohjeong
• Shin Kichul

Classifications

• G02F1/133707

  Structures for producing distorted electric fields, e.g. bumps, protrusions, recesses, slits in pixel electrodes · CPC title

• G02F2001/133742

  Physics · mapped topic

• G02F1/133711

  by organic films, e.g. polymeric films · CPC title

• H01L27/1262

  Electricity · mapped topic

• H01L27/1218

  Electricity · mapped topic