Liquid crystal display device and method of fabricating the same

Abstract

A liquid crystal display device includes a common electrode on an upper substrate, a gate driver on a lower substrate facing an upper substrate, an insulating pattern on the common electrode, and a conductive sealant for bonding the upper and lower substrates together that overlaps the gate driver.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a plan view of a liquid crystal display device in the related art;

FIG. 2 is a plan view of a cross-section of the lower substrate having a silver dot for supplying a common voltage to a common electrode shown in FIG. 1;

FIG. 3 is a plan view representing a liquid crystal display device according to a first embodiment of the present invention;

FIG. 4 is a plan view of an enlarged A area in FIG. 3;

FIG. 5 is a cross-sectional view of a liquid crystal display device along line I-I′ in FIG. 4;

FIG. 6 is a plan view of a liquid crystal display device according to a second embodiment of the present invention;

FIG. 7 is a plan view for explaining a gate driver of the liquid crystal display device in FIG. 6;

FIG. 8 is a plan view of a stage and an LOG line group in FIG. 7;

FIG. 9 is a cross-sectional view of a liquid crystal display device along line II-II′ in FIG. 8;

FIG. 10 is a plan view of a liquid crystal display device according to a third embodiment of the present invention;

FIG. 11 is a cross-sectional view of a liquid crystal display device along line III-III′ in FIG. 10;

FIG. 12 is another cross-sectional view of a liquid crystal display device taken along line III-III′ shown in FIG. 10; and

FIGS. 13A to 13C are views for explaining a process of fabricating a color filter array substrate of the liquid crystal display device according to the third embodiment of the present invention.

Claims

1. A liquid crystal display device, comprising: a common electrode on an upper substrate;a gate driver on a lower substrate facing an upper substrate;an insulating pattern on the common electrode; anda conductive sealant for bonding the upper and lower substrates together that overlaps the gate driver.

2. The liquid crystal display device according to claim 1, wherein the lower substrate has a connecting part connected to the common electrode by the conductive sealant.

3. The liquid crystal display device according to claim 2, wherein the conductive sealant includes a conductive ball that connects the connecting part to the common electrode on the upper substrate.

4. The liquid crystal display device according to claim 1, wherein the insulating pattern is equal to or less than a cell gap between the upper substrate and the lower substrate.

5. The liquid crystal display device according to claim 1, wherein the gate driver includes: at least one signal line group on the lower substrate to supply power signals and gate control signals; anda plurality of thin film transistors connected to the at least one signal line group.

6. The liquid crystal display device according to claim 5, further comprising: a gate insulating film covering the at least one signal line group;a passivation film covering the gate insulating film and the thin film transistor;a first contact hole penetrating the gate insulating film and the passivation film to expose the at least one signal line group;a second contact hole penetrating the passivation film to expose the thin film transistor; anda connection pattern formed on the passivation film for connecting the at least one signal line group to the thin film transistor through the first contact hole and the second contact hole.

7. The liquid crystal display device according to claim 6, wherein the insulating pattern corresponds to the connection pattern.

8. The liquid crystal display device according to claim 5, further comprising: a gate insulating film covering the at least one signal line group;an additional connection pattern on the gate insulating film;a passivation film covering the gate insulating film and the thin film transistor;a first contact hole penetrating the gate insulating film and the passivation film to expose the at least one signal line group;a second contact hole penetrating the passivation film to expose the thin film transistor;third and fourth contact holes penetrating the passivation film to expose the additional connection pattern;a first connection pattern on the passivation film for connecting the at least one signal line group to the additional connection pattern through the first contact hole and the third contact hole; anda second connection pattern formed on the passivation film for connecting the thin film transistor to the additional connection pattern through the second contact hole and the fourth contact hole.

9. The liquid crystal display device according to claim 8, wherein the insulating pattern is overlapped by the first and second connection patterns.

10. The liquid crystal display device according to claim 1, wherein the conductive sealant overlaps the gate driver.

11. A fabricating method of a liquid crystal display device, comprising: forming a gate driver on a lower substrate;forming a common electrode on an upper substrate;forming an insulating pattern on the common electrode and facing the gate driver; andforming a conductive sealant for bonding the upper and lower substrates together about the periphery of one of the upper and lower substrates; andbonding the upper and lower substrates together.

12. The fabricating method according to claim 11, wherein the insulating pattern is simultaneously formed along with a spacer for maintaining a cell gap between the upper and lower substrates.

13. The fabricating method according to claim 11, wherein the insulating pattern is formed to be equal to or less than a cell gap between the upper and lower substrates.

14. The fabricating method according to claim 11, further comprising forming a connecting part on the lower substrate such that the common electrode on the upper substrate is connected to the common electrode by the conductive sealant during the bonding of the upper and lower substrates.

15. The fabricating method according to claim 11, wherein the conductive sealant includes a conductive ball that connects the connecting part on the lower substrate to the common electrode on the upper substrate.

16. A liquid crystal display device, comprising: a common electrode on an upper substrate;a connection pattern on a lower substrate;an insulating pattern on the common electrode corresponding to the connection pattern; anda conductive sealant overlapping the connection pattern for bonding the upper substrate and the lower substrate together.

17. The liquid crystal display device according to claim 16, wherein the conductive sealant includes a conductive ball that contacts the connection pattern on the lower substrate and the insulating pattern on the common electrode of the upper substrate.

18. A fabricating method of a liquid crystal display device, comprising: forming a connection pattern on a lower substrate;forming a common electrode on an upper substrate;forming an insulating pattern on the common electrode corresponding to the connection pattern; andbonding the upper substrate and the lower substrate together with a conductive sealant overlapping the connection pattern.

19. The fabricating method according to claim 18, wherein the conductive sealant includes a conductive ball that contacts the connection pattern on the lower substrate and the insulating pattern on the common electrode of the upper substrate.

20. A liquid crystal display device, comprising: a common electrode on an upper substrate;a connecting part on a lower substrate facing the upper substrate; anda conductive sealant for bonding the upper and lower substrates together that overlaps the connecting part, wherein the conductive sealant includes a conductive ball that connects the connecting part on the lower substrate to the common electrode on the upper substrate.