KR100303352B1 - Liquid crystal display - Google Patents

Abstract

The present invention discloses a liquid crystal display device capable of preventing the damage of the pattern by preventing the accumulation of static electricity in the conductive pattern formed on the data bus line and the lower portion. The disclosed invention includes an insulating substrate, a gate bus line disposed on the insulating substrate, a gate insulating film formed to cover the gate bus line and the insulating substrate, and a data bus line disposed over a predetermined portion of the gate insulating film. A liquid crystal display device comprising: a data bus line having a conductive pattern for disconnection assistance of a data bus line at a lower portion thereof, and at both ends of the conductive pattern and the data bus line, electrostatic patterns are generated in the conductive pattern and the data bus line. It characterized in that the short ring for removing the static electricity is provided.

Description

Liquid crystal display

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of preventing pattern breakage due to electrostatic accumulation in a liquid crystal display device having a conductive pattern for preventing disconnection under a data bus line.

In general, as the performance of active matrix liquid crystal display panels has developed rapidly, they have become widely used in applications such as flat panel TV systems or high-information monitors for portable computers.

In the active matrix liquid crystal display panel, a plurality of gate bus lines and a plurality of data bus lines are cross-arranged to define several unit pixel spaces.

Switching elements are disposed near intersections of these gate bus lines and data bus lines, and pixel electrodes made of a transparent material are disposed in each unit pixel while being connected to the switching elements.

In such a liquid crystal display device, as the number of unit pixels increases, the number of crossings of the gate bus lines and the data bus lines increases, so that disconnection and short are likely to occur.

In particular, disconnection and short of the data bus line formed on the stepped portion rather than the gate bus line are frequently generated. Accordingly, in order to prevent such disconnection and short circuit of the data bus line, a method of forming the data bus line in a double layer has been conventionally proposed.

That is, as shown in FIG. 1A, a plurality of conductive patterns 3 are formed at regular intervals in the form of data bus lines on the insulating substrate 1 on which the gate bus lines (not shown) and the gate insulating film (not shown) are formed. The dog is placed.

Then, as shown in FIG. 1B, the data bus lines 5 are disposed on the conductive pattern 3 so as to be stacked respectively. Short ends are formed at both ends of the data bus line 5 to prevent static electricity generated in the panel. At this time, the data bus line 5 is preferably formed of an opaque metal film.

When the data bus line 5 is formed in this manner, when the data bus line 5 is formed in a stacked form, even if the data bus line 5 is partially disconnected, the lower conductive pattern 3 is formed on the data bus line 5. It will play the role of transmitting signal.

However, when the data bus line is formed of the conductive pattern 3 and the double layer, the following problems are caused.

That is, since the conductive pattern 3 is in a floating state, as shown in the drawing, the static electricity generated in the liquid crystal display panel is continuously accumulated without transferring and discharging the static electricity generated in the liquid crystal display panel to the short ring 7. .

For this reason, when static electricity accumulates to a certain degree or more, a part of the conductive pattern bursts inside the cell, causing pattern breakage.

Accordingly, an object of the present invention is to provide a liquid crystal display device capable of preventing the damage of the pattern by preventing the accumulation of static electricity in the conductive pattern formed on the data bus line and the lower portion.

1A is a plan view showing a conventional conductive pattern.

1B is a plan view showing a conventional data bus line.

Figure 2a is a plan view showing a conductive pattern according to the present invention.

2b is a plan view of a data bus line in accordance with the present invention;

3A and 3B are plan views showing contact portions of the short ring portions.

(Explanation of symbols for the main parts of the drawing)

10-insulated substrate 12-conductive pattern

13-short ring of conductive pattern 14-pad of conductive pattern

15-Data Bus Lines 16-Shorting of Data Bus Lines

17-Pad of data bus line 100-Gate bus line

In order to achieve the above object of the present invention, according to an embodiment of the present invention, the present invention is formed to cover the insulating substrate, the gate bus line disposed on the insulating substrate, the gate bus line and the insulating substrate A liquid crystal display device comprising: a gate insulating film; and a data bus line disposed on a predetermined portion of the gate insulating film, wherein the data bus line includes a conductive pattern for preventing disconnection of the data bus line; Each of both ends of the data bus line is provided with a conductive pattern and a short ring for removing static electricity when static electricity is generated in the data bus line.

The short ring of the conductive pattern is a thin film transistor in which a predetermined portion of the gate bus line is a gate electrode, and the source drain electrode is a conductive pattern, and the gate bus line is in contact with the conductive pattern. The pad may be disposed on the drain electrode of the short ring thin film transistor of the conductive pattern. The conductive pattern is preferably formed of ITO.

According to the present invention, in a liquid crystal display device in which a conductive pattern is formed below the data bus line, a short ring is formed on both sides of the conductive pattern similarly to the data bus line.

Accordingly, the static electricity generated in the conductive pattern portion can be easily discharged, and since a predetermined portion of the conductive pattern and the gate bus line are contacted by the formation of the short ring, static electricity accumulation does not occur. Thus, pattern bursting due to static accumulation is prevented, and pattern breakage is prevented.

(Example)

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2A is a plan view showing a conductive pattern according to the present invention, and FIG. 2B is a plan view showing a data bus line according to the present invention. 3A and 3B are plan views showing contact portions of the short ring portions.

Referring to FIG. 2A, a plurality of conductive patterns 3 are disposed at regular intervals in the form of data bus lines on an insulating substrate 10 on which a gate bus line (not shown) and a gate insulating film (not shown) are formed. do.

The conductive pattern 3 is preferably formed of an indium tin oxide (ITO) film, which is a transparent metal film. In this case, in the conductive pattern 3 of the present invention, a short ring 13 for preventing static electricity is disposed at edges of both ends of the conductive pattern 3 in order to prevent the pattern from being damaged due to the accumulation of static electricity. In addition, the pad 14 is attached to any one portion of both short rings 13, that is, the portion to which the printed circuit board is attached, and the short ring 13 is formed on one side of the pad 14 again.

At this time, the short ring is a thin film transistor which is turned on when static electricity flows in, as is known, to discharge static electricity toward the pad. Therefore, in the present embodiment, the gate electrode of the short ring thin film transistor is a gate bus line (or a storage line, not shown) of the liquid crystal display device, and the gate bus line is connected to the conductive pattern 12. In addition, the source electrode also becomes a conductive pattern 12, and the drain electrode becomes a pad 14.

Accordingly, when static electricity is generated in the conductive pattern 12, the thin film transistor is turned on so that the static electricity accumulated on the source electrode side (conductive pattern 12) is discharged to the drain electrode side (pad) 14.

In this case, in order to contact the gate bus line (not shown) and the conductive pattern 12 at the portion of the short ring 13, the gate insulating layer (not shown) is exposed so that the gate bus line is exposed before the conductive pattern 12 is formed. ) To form contact holes.

3A and 3B illustrate a form in which the gate bus line 100 is exposed by the contact hole. That is, as shown in FIG. 3A, the contact hole may be formed in a rectangular frame shape to expose the gate bus lines in a rectangular frame shape, or as shown in FIG. 3B, the contact hole may be formed in a rectangular plate shape and the gate bus lines in a rectangular plate shape. Can be exposed.

Thereafter, as shown in FIG. 2B, data bus lines 15 made of an opaque metal film on each of the conductive patterns 12 are stacked. At this time, the short rings 16 are disposed on both ends of the data bus line 5 in the same manner as before, and the pad 17 is attached to any one of the short circuits 16, that is, the portion to which the printed circuit board is attached. Is formed, and the short ring 16 is formed again on one side of the pad 17.

At this time, the short ring 16 and the pad 17 of the data bus line 15 are formed in a known manner.

When the data bus line 15 is formed in a double layer with the conductive pattern 12 as in the present invention, when the data bus line 15 is disconnected, the signal of the data bus line 15 is transmitted through the conductive pattern 12. do.

In addition, since the short ring is formed on both sides of the conductive pattern 12 similarly to the data bus line 15, it can be easily discharged through the short ring when static electricity is generated.

Furthermore, since the conductive pattern 12 and the gate bus line 100 are in contact with each other in order to form a short ring, electrostatic accumulation does not occur.

Here, in the present embodiment, the gate bus line has been described as an example of contacting with the conductive pattern of the short ring portion, but the present invention is not limited thereto, and the same effect is obtained even when contacting the storage line or the common electrode terminal connected to the common electrode. You can reap.

As described in detail above, according to the present invention, in a liquid crystal display device in which a conductive pattern is formed below the data bus line, a short ring is formed on both sides of the conductive pattern similarly to the data bus line.

Accordingly, the static electricity generated in the conductive pattern portion can be easily discharged, and since a predetermined portion of the conductive pattern and the gate bus line are contacted by the formation of the short ring, static electricity accumulation does not occur.

Therefore, the pattern bursting due to the electrostatic accumulation is prevented so that the breakage of the pattern does not occur.

In addition, this invention can be implemented in various changes within the range which does not deviate from the summary.

Claims (4)

A liquid crystal display comprising an insulated substrate, a gate bus line disposed on the insulated substrate, a gate insulating film formed to cover the gate bus line and the insulating substrate, and a data bus line disposed in a predetermined portion above the gate insulating film As a device, The data bus line has a conductive pattern for preventing disconnection of the data bus line, And a short ring disposed at each of both ends of the conductive pattern and the data bus line to remove static electricity when static electricity is generated in the conductive pattern and the data bus line. The thin film transistor according to claim 1, wherein the short ring of the conductive pattern is a thin film transistor having a predetermined portion of the gate bus line as a gate electrode and the source drain electrode as a conductive pattern, wherein the gate bus line is in contact with the conductive pattern. Liquid crystal display device characterized in that. The liquid crystal display device according to claim 2, wherein a pad is disposed on a drain electrode of the short ring thin film transistor of the conductive pattern. The liquid crystal display of claim 1, wherein the conductive pattern is indium tin oxide (ITO).