LIQUID CRYSTAL DISPLAY DEVICE AND MANUFACTURING METHOD THEREOF

• US 20090040446A1
• Filed: 06/20/2008
• Published: 02/12/2009
• Est. Priority Date: 08/10/2007
• Status: Active Grant

• Current Assignee: Industry-University Cooperation Foundation Hanyang University, Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Industry-University Cooperation Foundation Hanyang University, Samsung Electronics Co. Ltd.
• Inventors: KIM, Jae-hoon, HONG, Wang-su
• Granted Patent: US 9,091,888 B2
• Time in Patent Office: Days
• US Class Current: 349/129
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/1337 Surface-induced orientation of the liquid crystal molecules, e.g. by alignment layers
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence

Abstract

A liquid crystal display device, includes a first substrate including a first insulating substrate, a first thin film positioned on the first insulating substrate, and a first alignment layer positioned on the first thin film and including a first exposing area that exposes the first thin film, a second substrate facing the first substrate and including a second insulating substrate, a spacer positioned between the first substrate and the second substrate and including at least a part that corresponds to the first exposing area, and a liquid crystal layer positioned between the first substrate and the second substrate.

Claims

1. A liquid crystal display device, comprising:

a first substrate comprising a first insulating substrate, a first thin film positioned on the first insulating substrate, and a first alignment layer positioned on the first thin film, the first alignment layer comprising a first exposing area that exposes the first thin film;

a second substrate facing the first substrate and comprising a second insulating substrate;

a spacer positioned between the first substrate and the second substrate, the spacer comprising at least a part that corresponds to the first exposing area; and

a liquid crystal layer positioned between the first substrate and the second substrate.

2. The liquid crystal display device of claim 1, wherein the second substrate further comprises a second alignment layer positioned on the second insulating substrate.

3. The liquid crystal display device of claim 2, wherein the liquid crystal layer directly contacts the first alignment layer and the second alignment layer.

4. The liquid crystal display device of claim 2, wherein the second substrate further comprises a second thin film positioned between the second alignment layer and the second insulating substrate, and

the second alignment layer comprises a second exposing area that exposes the second thin film.

5. The liquid crystal display device of claim 4, wherein at least a part of the spacer is positioned to correspond to the second exposing area.

6. The liquid crystal display device of claim 4, wherein the second exposing area is positioned to correspond to the first exposing area.

7. The liquid crystal display device of claim 2, wherein the spacer directly contacts the first substrate and the second substrate.

8. The liquid crystal display device of claim 7, wherein the first exposing area has a lattice shape.

9. The liquid crystal display device of claim 2, wherein at least one of the first insulating substrate and the second insulating substrate comprises a plastic insulating substrate.

10. The liquid crystal display device of claim 2, wherein the spacer comprises at least one of an ultraviolet ray curable resin and a thermal curable resin.

11. A manufacturing method of a liquid crystal display device, comprising:

providing a first substrate comprising a first insulating substrate, a first thin film positioned on the first insulating substrate, and a first alignment layer positioned on the first thin film, the first alignment layer comprising a first exposing area that exposes the first thin film;

providing a second substrate comprising a second insulating substrate and a second alignment layer that is disposed on the second insulating substrate;

positioning a liquid crystal polymer composition on one of the first substrate and the second substrate, the liquid crystal polymer composition comprising a polymer having greater chemical affinity for the first thin film than for the first alignment layer, and a liquid crystal molecule having greater chemical affinity for the first alignment layer than for the first thin film;

disposing one of the first substrate and the second substrate on the other of the first substrate and the second substrate; and

curing the liquid crystal polymer composition to form a spacer after a the polymer of the liquid crystal polymer composition becomes concentrated in an area corresponding to the first exposing area.

12. The method of claim 11, wherein the providing the second substrate comprises forming a second thin film having greater chemical affinity for the polymer than does the second alignment layer, the second thin film being positioned between the second insulating substrate and the second alignment layer, and

the second alignment layer comprises a second exposing area through which the second thin film is exposed.

13. The method of claim 12, wherein the second exposing area corresponds to the first exposing area when one of the first substrate and the second substrate is disposed on the other of the first substrate and the second substrate.

14. The method of claim 11, wherein the spacer directly contacts the first substrate and the second substrate.

15. The method of claim 14, wherein the first exposing area has a lattice shape.

16. The method of claim 11, wherein the liquid crystal polymer composition is cured using at least one of an ultraviolet ray and heat.

17. A manufacturing method of a liquid crystal display device, comprising:

providing a first substrate comprising a first insulating substrate, a thin film positioned on the first insulating substrate, and a first alignment layer positioned on the thin film, the first alignment layer comprising a first exposing area that exposes the thin film;

providing a second substrate comprising a second insulating substrate;

disposing the second substrate on the first substrate so that the first substrate and the second substrate face each other with a space therebetween;

disposing a liquid crystal polymer composition in the space, the liquid crystal polymer composition comprising a polymer having greater chemical affinity for the thin film than for the first alignment layer, and a liquid crystal molecule having greater chemical affinity for the first alignment layer than for the thin film to the distanced space; and

curing the liquid crystal polymer composition to form a spacer after the polymer of the liquid crystal polymer composition becomes concentrated in an area corresponding to the first exposing area.

18. The method of claim 17, wherein the providing the second substrate further comprises forming a second alignment layer on the second insulating substrate.

19. The method of claim 18, wherein providing the second substrate comprises forming a second thin film having greater chemical affinity for the polymer than does the second alignment layer, the second film being positioned between the second insulating substrate and the second alignment layer, and

the second alignment layer comprises a second exposing area through which the second thin film is exposed.