Liquid crystal display device and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9411183-B2
Application number	US-201213704789-A
Country	US
Kind code	B2
Filing date	Oct 29, 2012
Priority date	Nov 14, 2011
Publication date	Aug 9, 2016
Grant date	Aug 9, 2016

Abstract

Embodiments of the invention disclose a liquid crystal display device and a method for manufacturing the same. The liquid crystal display device comprises: a color filter substrate including a first transparent substrate; and an array substrate including a second transparent substrate, wherein the first transparent substrate has a first transparent magnetic film layer formed thereon, the second transparent substrate has a second transparent magnetic film layer formed thereon, and the first transparent magnetic film layer and the second transparent magnetic film layer have the same magnetism.

First claim

The invention claimed is:

1. A liquid crystal display device comprising:
a color filter substrate including a first transparent substrate; and
an array substrate including a second transparent substrate,
wherein the first transparent substrate has a first transparent magnetic film layer formed thereon, the second transparent substrate has a second transparent magnetic film layer formed thereon, and the first transparent magnetic film layer and the second transparent magnetic film layer have the same magnetism to produce uniform magnetic fields of same polarities that repulse each other to form a cell gap between the color filter substrate and the array substrate,
wherein the color filter substrate further comprises:
a black matrix and color filters which are formed on the first transparent substrate; and
a common electrode formed on the black matrix and the color filters; and
wherein the first transparent magnetic film layer is formed between the common electrode and an alignment film.

2. The liquid crystal display device of claim 1 , wherein the first transparent magnetic film layer and the second transparent magnetic film layer each include a dopant and a substance to be doped, the dopant is one or more of acetylacetonates comprising a magnetic transition group metal element, and the substance to be doped is one or more of acetylacetonates comprising a nonmagnetic transition group metal element.

3. The liquid crystal display device of claim 2 , wherein the magnetic transition group metal element includes one or more of Fe, Co, Ni, and Mn, and the nonmagnetic transition group metal element includes one or more of Zn, Zr, Ti, and Ga.

4. The liquid crystal display device of claim 1 , wherein the color filter substrate further comprises the alignment film formed on the outermost layer thereof.

5. The liquid crystal display device of claim 1 , wherein the array substrate further comprises:
gates formed on the second transparent substrate;
a gate insulator layer formed on the gates;
an active layer, source/drain layers, and a pixel electrode layer which are formed on the gate insulator layer; and
an insulating layer formed on the source/drain layers and the pixel electrode layer.

6. The liquid crystal display device of claim 5 , wherein the second transparent magnetic film layer is formed between the insulating layer and a second alignment film.

7. The liquid crystal display device of claim 6 , wherein the array substrate further comprises the second alignment film formed on the outermost layer thereof.

8. A method for manufacturing a liquid crystal display device, comprising:
forming a color filter substrate including a first transparent substrate, the first transparent substrate having a first transparent magnetic film layer formed thereon;
forming an array substrate including a second transparent substrate, the second transparent substrate having a second transparent magnetic film layer formed thereon, and the second transparent magnetic film layer and the first transparent magnetic film layer having the same magnetism to produce uniform magnetic fields of same polarities that repulse each other to form a cell gap between the color filter substrate and the array substrate; and
bonding the color filter substrate to the array substrate to form a space between the color filter substrate and the array substrate, and injecting liquid crystals into the space; wherein the forming of the color filter substrate comprises:
forming a black matrix and color filters on the first transparent substrate;
forming a common electrode on the black matrix and the color filters; and
forming the first transparent magnetic film layer between the common electrode and an alignment film.

9. The method for manufacturing the liquid crystal display device of claim 8 , wherein the forming of the array substrate comprises:
forming gates on the second transparent substrate;
forming a gate insulator layer on the gates;
forming an active layer, source/drain layers, and a pixel electrode layer on the gate insulator layer; and
forming an insulating layer on the source/drain layers and the pixel electrode layer.

10. The method for manufacturing the liquid crystal display device of claim 9 , wherein the forming of the array substrate further comprises: forming the second transparent magnetic film layer between the insulating layer and a second alignment film.

11. The method for manufacturing the liquid crystal display device of claim 8 , wherein the forming of the first transparent magnetic film layer or the second transparent magnetic film layer comprises:
mixing a dopant comprising a magnetic transition group metal element and a substance to be doped comprising a nonmagnetic transition group metal element into a mixed raw material, and pressing the mixed raw material into an evaporation target;
disposing the evaporation target in a container, disposing the container in a deposition chamber for a plasma enhanced chemical vapor disposition process, and vacuumizing the deposition chamber;
feeding the color filter substrate and the array substrate into the deposition chamber, making the insulating layer and the common electrode face directly just above the evaporation target, and feeding a reaction gas of O 2 into the deposition chamber and igniting it;
heating the container to make the mixed raw material in the evaporation target escape from a surface, and the molecules of O 2 decomposing, so that transparent films of the mixed raw material are deposited on the surfaces of the insulating layer and the common electrode through chemical reaction deposition;
stopping the heating and cooling the transparent films on the surfaces of the insulating layer and the common electrode spontaneously, and then drawing the color filer substrate and the array substrate out from the deposition chamber; and
locating the color filter substrate and the array substrate in a chamber in which an external magnetic field is applied, and performing a magnetization process on the transparent films to make them become transparent magnetic film layers.

12. The method for manufacturing the liquid crystal display device of claim 11 , wherein the dopant is one or more of acetylacetonates comprising a magnetic transition group metal element, and the substance to be doped is one or more of acetylacetonates comprising a nonmagnetic transition group metal element.

13. The method for manufacturing the liquid crystal display device of claim 12 , wherein the magnetic transition group metal element includes one or more of Fe, Co, Ni, and Mn, and the nonmagnetic transition group metal element includes one or more of Zn, Zr, Ti, and Ga.

14. The method for manufacturing the liquid crystal display device of claim 13 , wherein the magnetic transition group metal element is Co, the atom ratio of Co in the mixed raw material is of 6%, the nonmagnetic transition group metal element is Ti, and the atom ratio of Ti in the mixed raw material is of 94%.

15. The method for manufacturing the liquid crystal display device of claim 8 , wherein the forming of the color filter substrate includes: forming the alignment film on the outermost layer of the color filter substrate, and performing an alignment process on the alignment film; and the forming of the array substrate includes: forming a second alignment film on the outermost layer of the array substrate, and performing an alignment process on the second alignment film.

16. The method for manufacturing the liquid crystal display device of claim 8 , further comprising after injecting the liquid crystals: sealin

Assignees

• Boe Technology Group Co Ltd
• Chengdu Boe Optoelect Tech Co

Inventors

• Zuo Xiongcan
• Lim Junhwan

Classifications

• G02F2001/133302

  Physics · mapped topic

• G02F1/1333 Primary

  Constructional arrangements; {Manufacturing methods}(G02F1/135, G02F1/136 take precedence) · CPC title

• G02F1/133302

  Rigid substrates, e.g. inorganic substrates · CPC title