IP Library Granted Patent US 7,404,993
Granted Patent B2
US 7,404,993 · App. 11/477,821 · Granted Jul 29, 2008

Liquid crystal display device and method of fabricating the same

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Quick Facts
Patent No.
US 7,404,993
App. No.
11/477,821
Granted
Jul 29, 2008
Kind
B2
Abstract

A liquid crystal display device includes a first substrate; a second substrate facing the first substrate; a pixel electrode on the first substrate; a common electrodes on the second substrate; a first alignment layer on the pixel electrode; a second alignment layer on the common electrode; a liquid crystal layer between the first and second alignment layers, liquid crystal molecules of the liquid crystal layer disposed in a bend state; and a hydrogen-bonded structure in the liquid crystal layer, the hydrogen-bonded structure having a bow shape to maintain the bend state of the liquid crystal molecules.

Claims (29)

1. A liquid crystal display device, comprising:

a first substrate;

a second substrate facing the first substrate;

a pixel electrode on the first substrate;

a common electrodes on the second substrate;

a first alignment layer on the pixel electrode;

a second alignment layer on the common electrode;

a liquid crystal layer between the first and second alignment layers, liquid crystal molecules of the liquid crystal layer disposed in a bend state; and

a hydrogen-bonded structure in the liquid crystal layer, the hydrogen-bonded structure having a bow shape to maintain the bend state of the liquid crystal molecules.

2. The device according to claim 1 , wherein the hydrogen-bonded structure includes a plurality of self assembled hydrogen-bonded fibers arranged in the bow shape.

3. The device according to claim 2 , wherein the self assembled hydrogen-bonded fiber includes at least one of fluorine (F), nitrogen (N), oxygen (O) and atoms having electronegativity properties corresponding thereto.

4. The device according to claim 2 , wherein the self assembled hydrogen-bonded fiber includes Lys18 having a structural formula,

5. The device according to claim 2 , wherein the self assembled hydrogen-bonded fibers have an isotropic state at temperatures greater than a transition temperature and is hydrogen-bonded at temperatures below the transition temperature.

6. The device according to claim 5 , wherein the transition temperature is about 70 degrees centigrade.

7. The device according to claim 1 , further comprising a color filter layer on the second substrate.

8. The device according to claim 1 , further comprising gate and data lines crossing each other, and a thin film transistor connected to the gate and data lines and the pixel electrode.

9. A method of fabricating a liquid crystal display device, comprising:

interposing a liquid crystal layer between first and second substrates disposed facing each other, the liquid crystal layer including self assembled hydrogen-bonded fibers;

heating the liquid crystal layer to a first temperature such that liquid crystal molecules and the self assembled hydrogen-bonded fibers have an isotropic state; and

cooling the liquid crystal layer to a second temperature less than the first temperature and applying an electric field to the liquid crystal layer such that the liquid crystal molecules have a bend state and the self assembled hydrogen-bonded fibers form a hydrogen-bonded structure having a bow shape.

10. The method according to claim 9 , wherein the self assembled hydrogen-bonded fiber includes at least one of fluorine (F), nitrogen (N), oxygen (O) and atoms having electronegativity properties corresponding thereto.

11. The method according to claim 9 , wherein the self assembled hydrogen-bonded fiber includes Lys18 having a structural formula,

12. The method according to claim 9 , wherein the self assembled hydrogen-bonded fibers have an isotropic state at temperatures greater than a transition temperature and is hydrogen-bonded at temperatures below the transition temperature.

13. The method according to claim 12 , wherein the transition temperature is about 70 degrees centigrade.

14. The method according to claim 13 , wherein the first temperature is about 70 to 90 degrees centigrade.

15. The method according to claim 12 , wherein the first temperature is greater than the transition temperature, and the second temperature is less than the transition temperature.

16. The method according to claim 9 , wherein the second temperature is substantially room temperature.

17. The method according to claim 9 , further comprising forming a pixel electrode on the first substrate and a first alignment layer on the pixel electrode.

18. The method according to claim 9 , further comprising forming a common electrode on the second substrate and a second alignment layer on the common electrode.

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 Oct 26, 2006
From: CHOI, SANG-HO; CHOI, SU-SEOK
To: LG.PHILIPS LCD CO., LTD.
Reel/Frame 018467/0645 →