Method for manufacturing LCD panel comprising spacers having cavity filled with adhesive

• US 7,705,958 B2
• Filed: 12/07/2006
• Issued: 04/27/2010
• Est. Priority Date: 03/24/2006
• Status: Active Grant

• Current Assignee: AU Optronics Corporation
• Original Assignee: Quanta Display Incorporated (AUO Corp.)
• Inventors: Huang, Tai-Chi, Wang, Yeong-Feng
• Primary Examiner(s): Duong; Thoi V
• Application Number:
  US11/634,867
• Publication Number:
  US 20070222934A1
• Time in Patent Office: 1,237 Days
• Field of Search: 349/155, 349/156, 349/187, 349/153, 349/158, 349/106, 349/122
• US Class Current: 349/155
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 2202/28 Adhesive materials or arrangements

Abstract

A method for manufacturing a liquid crystal display device is disclosed. The method includes the steps of: forming multiple spacers having a cavity on the upper substrate or on the lower substrate; injecting adhesives or binders in the cavities of the spacers; and curing the adhesives or the binders in the cavities to bind the upper substrate and the lower substrate. Through the method illustrated above, the strength for combining these two substrates can be enhanced. Moreover, the uniformity of the gap inside the LCD panel, and the gravity mura resulted from the gravity can be improved. Therefore, the lifetime of the LCD can be extended.

Claims

1. A method for fabricating a panel of a liquid crystal display, comprising:

providing an upper substrate and a lower substrate;

forming a plurality of spacers between the upper substrate and the lower substrate, wherein each of the spacers has at least a cavity;

filling the cavity with an adhesive; and

curing the adhesive to assemble the upper substrate and the lower substrate.

2. The method of claim 1, further comprising:

sealing the periphery of the upper substrate with a glue; and

filling a liquid crystal composition between the combined and sealed space between the upper substrate and the lower substrate.

3. The method of claim 1, wherein the spacers are formed on the surface of the lower substrate.

4. The method of claim 1, wherein the spacers are formed through photolithography.

5. The method of claim 4, wherein the spacers are formed through a halftone process.

6. The method of claim 5, wherein the adhesive is cured through radiation of UV light, laser, or IR radiation.

7. The method of claim 1, wherein the adhesive is filled through ink-jet printing.

8. The method of claim 1, wherein the adhesive is cured through radiation.

9. The method of claim 1, wherein the adhesive is cured through heating.

10. A liquid crystal display panel, comprising:

an upper substrate;

a lower substrate;

a plurality of spacers between the upper substrate and the lower substrate; and

a liquid crystal layer disposed between the upper substrate and the lower substrate;

wherein part of the spacers has cavities and adhesives filled in the cavities, and the adhesives in the cavities adhere to the upper substrate after curing.

11. The panel of claim 10, wherein the spacers having cavities are laid in the lower half pan of the panel when the panel is arranged vertically or in a slant angle.

12. The panel of claim 10, wherein the adhesive is a photosensitive polymer, a laser sensitive polymer, a thermal curing polymer, or combinations thereof.

13. The panel of claim 12, wherein the photosensitive polymer is a UV-curable polymer.

14. The panel of claim 10, wherein the plurality of spacers are made of a photosensitive polymer, silica, polystyrene, or combinations thereof.

15. The panel of claim 10, wherein the plurality of spacers are in a shape of a ball, a pole, a bump with different top area and bottom area, a cone, or combinations thereof.

16. The panel of claim 10, wherein the cavity of the spacers is a rectangular cavity, an egg-shaped cavity, a ball-shaped cavity, or combinations thereof.

17. The panel of claim 10, wherein the upper substrate comprises an alignment film, and a transparent electrode.

18. The panel of claim 10, wherein the lower substrate comprises an alignment film, a color filter, a black matrix, a thin film transistor, and a transparent electrode.

19. A liquid crystal display panel, comprising:

an upper substrate;

a lower substrate;

a plurality of spacers between the upper substrate and the lower substrate; and

a liquid crystal layer disposed between the upper substrate and the lower substrate;

wherein part of the spacers has cavities and adhesives filled in the cavities.

20. The panel of claim 19, wherein the spacers are comprised of a red color filter, a blue color filter or a green color filter.