KR20070072141A - Liquid crystal display panel and method for manufacturing the same - Google Patents

Abstract

An LCD(Liquid Crystal Display) panel and a manufacturing method thereof are provided to greatly reduce a load applied to a data line by applying a load of only a data line to the data line. A gate layer is formed on a substrate and includes a gate line(210) and a gate electrode. A data layer intersects the gate layer on the gate layer and includes a data line(220), a drain electrode, and a source electrode. A passivation layer is formed to cover the data layer. A first transparent conductive pad is connected to an end of the data line through the passivation layer. A static-electricity preventing pattern is spaced apart from the transparent conductive pad and is formed between a common line and a ground line. A second transparent conductive pad is connected to an end of the gate line through the passivation layer.

Description

Liquid crystal display panel and method for manufacturing the same

1 is a schematic view showing a conventional liquid crystal display panel.

2 is a schematic view showing a liquid crystal display panel according to an embodiment of the present invention and a partially enlarged view thereof.

FIG. 3 is a partial cross-sectional view illustrating the liquid crystal display panel of FIG. 2 in more detail.

<Explanation of symbols on main parts of the drawings>

210: gate line 220: data line

230: common voltage line 240: floating line

250: antistatic circuit 260, 370: transparent conductive material pad

320: gate layer 330: gate insulating layer

340: data layer 350: protective layer

360: pixel electrode

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel and a method of manufacturing the same, and more particularly, to a liquid crystal display panel and a manufacturing method thereof, which are improved to have characteristics such as reduction of current consumption and stabilization of a driving IC by reducing load of a data line. It is about a method.

In recent years, liquid crystal displays are spotlighted as display means.

The liquid crystal display performs display functions using the electrical and optical properties of the liquid crystal injected into the panel, and is widely applied to various fields such as computer monitors and mobile communication terminals due to the advantages of small size, light weight, and low power consumption. There is a trend.

FIG. 1 is a schematic view showing a conventional liquid crystal display panel, and shows a configuration of a transverse electric field type liquid crystal display panel.

Referring to FIG. 1, a liquid crystal display panel includes a display area formed by the intersection of a plurality of gate lines 110 and a plurality of data lines 120, a common voltage Vcom line 130, a floating line 140, and the like. It is configured to include. Although not shown, a gate driver may be provided at the other side where the common voltage line 130 is formed, and a data driver may be provided at the other side of the floating line 140.

It can be seen that the common line 135 to which the common voltage Vcom is applied is arranged so as to alternate with the gate line in a direction parallel to the gate line 110.

At this time, between each gate line 110 and the data line 120 and the common voltage line 130 and the floating line 140, the antistatic circuit 150 to protect the internal pixels from static electricity generated from the outside ) Is formed.

However, due to such an antistatic circuit 150, in particular, the load (load) of the data line 120 is increased, there is a problem that causes an increase in current consumption, panel characteristics, and the like. In other words, the load applied to the data line 120 of the liquid crystal display panel configured to have the antistatic circuit structure as shown in FIG. 1 may include loads applied from a plurality of antistatic circuits in addition to the load of the pure data line. Overload of the same load may cause an increase in power consumption, which may affect the characteristics of the driving IC in the long term, and may cause a defect of the liquid crystal display panel.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a liquid crystal display panel and a method of manufacturing the same, which are improved to have characteristics such as reduction of current consumption and stabilization of a driving IC by reducing the load of a data line.

The objects of the present invention are not limited to the above-mentioned objects, and other objects which are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, the liquid crystal display panel according to the exemplary embodiment of the present invention is formed on a substrate and is formed so as to be insulated from the gate layer on the gate layer, the gate layer constituting the gate line and the gate electrode, and the data line and the drain. A data layer constituting the electrode and the source electrode, a protective layer formed to cover the data layer, and a protective layer formed on the protective layer, at least a part of which is electrically connected to the data line and the drain electrode through the protective layer to form the data pad and the pixel electrode. It comprises a transparent conductive material layer.

In addition, the method of manufacturing a liquid crystal display panel according to an exemplary embodiment of the present invention includes forming a gate layer constituting a gate line and a gate electrode on a substrate, insulated from the gate layer on the gate layer, and crossing the data line; Forming a data layer constituting the drain electrode and the source electrode, forming a protective layer to cover the data layer, forming a first transparent conductive material pad connected to the end of the data line through the protective layer and transparency Forming an antistatic pattern between the common line Vcom and the ground GND line to be spaced apart from the conductive material pad.

Specific details of other embodiments are included in the detailed description and the drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various forms, and the present embodiments are merely provided to make the disclosure of the present invention complete and the general knowledge in the art to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, the invention is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

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

2 is a schematic view showing a liquid crystal display panel according to an embodiment of the present invention and a partially enlarged view thereof.

2, a liquid crystal display panel according to an exemplary embodiment of the present invention may include a gate line 210, a common line 215, a data line 220, a common voltage line 230, a floating line 240, and static electricity. Prevention circuit 250 and the like.

First, the configuration and operation of the liquid crystal display panel will be briefly described.

In the display area, a plurality of gate lines 210 and data lines 220 are formed in a matrix form. Thin film transistors (TFTs), which are switching elements, are formed at intersections of the plurality of gate lines 210 and the data lines 220.

In general, a color filter is formed on an opposite substrate facing the substrate on which the thin film transistor is formed, and a liquid crystal layer is formed between the two substrates to form a liquid crystal display panel.

The liquid crystal molecules constituting the liquid crystal layer vary in orientation depending on the vertical electric field between the lower substrate and the upper substrate, or the horizontal electric field inside the lower substrate, and the amount of light transmitted by the alignment of the liquid crystal is changed to various images. Information can be displayed.

The liquid crystal display panel shown in the drawing is operated by a horizontal electric field method (IPS), and therefore, since the common electrode is formed on the thin film transistor substrate, it can be seen that the common line 215 is formed to be parallel to the gate line 210. have.

Although not shown in detail, the thin film transistor includes a gate electrode, a source electrode, a drain electrode, an active layer, and an ohmic contact layer, and the drain electrode is connected to the pixel electrode to form a unit pixel. In the thin film transistor having the structure, when a gate signal is applied to the gate electrode through the gate line 210, the data signal applied to the data line 220 is transferred from the source electrode to the drain electrode through the ohmic contact layer and the active layer. It works by doing.

That is, when a data signal is applied to the source electrode, a voltage corresponding thereto is applied to the pixel electrode connected to the source electrode. As a result, a voltage difference is generated between the pixel electrode and the common electrode. The molecular arrangement of the liquid crystal placed on the substrate is changed, and the light transmittance of the pixel is changed due to the change in the molecular arrangement of the liquid crystal, and a color difference of the pixel is generated according to the difference of the data signal applied to each pixel. By using the color difference, the screen of the liquid crystal display may be controlled.

The data signal applied to the source electrode is provided from a data driver (not shown), and the gate signal applied to the gate electrode is provided from a gate driver (not shown).

The gate driver sequentially provides a gate signal to each gate line 210 for activating or deactivating the gate electrode. Then, the data driver provides the gray voltage corresponding to the data signal to the plurality of data lines 220 in accordance with the timing at which the gate signal is applied.

Synchronizing and controlling between the data driver and the gate driver may be performed by a timing controller T-CON provided separately.

In this case, the data line 220 of the liquid crystal display panel according to the exemplary embodiment of the present invention does not include an antistatic circuit between the floating line 240 or the common voltage line 230. Instead, the end of the data line 220 is configured to be connected to a pad of transparent conductive material such as ITO formed on the top of the passivation layer through a contact hole formed in the passivation layer.

The above description will be described in more detail through the enlarged partial view shown below.

Referring to the drawings, an end of the data line 220 is connected to the transparent conductive material pad 260, and is spaced apart from the antistatic circuit formed between the floating line 240 or the common voltage line 230, etc. It can be seen that 250) is provided.

As a result, loads other than the load of the line itself may not be applied to the data line 220, thereby reducing power consumption, and improving image characteristics of the driving IC and the liquid crystal display panel.

FIG. 3 is a partial cross-sectional view illustrating the liquid crystal display panel of FIG. 2 in detail, and illustrates a thin film transistor region, a data line region, and a transparent conductive material pad region.

Referring to Figure 3, look at the manufacturing process of the liquid crystal display panel according to an embodiment of the present invention.

First, the gate layer 320 is formed on the substrate 310. The gate layer 320 constitutes a gate electrode, a gate line, or the like of the thin film transistor.

Next, the gate insulating layer 330 is formed on the entire surface of the substrate to cover the gate layer 320, and then the data layer 340 is intersected with the gate layer 320 on the gate insulating layer 330. Form. The data layer 340 constitutes a drain electrode 340a, a source electrode 340b and a data line 340c of the thin film transistor.

In this case, a semiconductor layer that functions as a channel region of the thin film transistor may be formed in a region overlapping with the gate layer 320 and the data layer 340 on the gate insulating layer 330, but is not illustrated.

When the formation of the data layer 340 is completed, the protective layer 350 is formed to completely cover them. The pixel electrode 360 and the like are formed in a predetermined region on the protective layer 350 by a transparent conductive material layer such as ITO or IZO.

In this case, a transparent conductive material pad 370 may be formed in the end region of the data line 340c, which may be formed of the same material as the pixel electrode 360, and the transparent conductive material pad 370 may be a protective layer 350. In contact with the end of the data line 340c.

Accordingly, the end of the data line 340c is closed by the contact with the transparent conductive material pad 370, thereby eliminating the burden of applying loads other than the load of the line itself to the data line 340c.

In addition, the transparent conductive material pad 370 may be formed so that one end thereof has a shape of a rectangle or a circle, and thus, an easier process such as an auto probe inspection may be performed in the manufacturing process of the liquid crystal display panel. And quick execution is possible.

Although not shown here, it is obvious that the end of the gate line may also be finished through a separate transparent conductive material pad by ITO material or the like.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, the embodiments described above are to be understood in all respects as illustrative and not restrictive.

According to the liquid crystal display panel and the manufacturing method thereof according to the embodiment of the present invention as described above, the load of the pure data line can be applied to the data line, which is applied to the data line as compared with the conventional liquid crystal display panel. The load can be greatly reduced.

As a result, the power consumption of the liquid crystal display panel can be reduced. For this reason, advantages such as increased durability of the driving IC and the liquid crystal display panel and improvement of image characteristics have also been obtained.

In addition, the end of the data line can be exposed through a conductive transparent electrode material, etc., thereby making it easier and faster to perform processes such as auto probe inspection in the manufacturing process of the liquid crystal display panel. There are additional advantages.

Claims (6)

A gate layer formed on the substrate and constituting the gate line and the gate electrode; A data layer formed on the gate layer so as to be insulated from and cross the gate layer and constitute a data line, a drain electrode, and a source electrode; A protective layer formed to cover the data layer; A first transparent conductive material pad connected to an end of the data line through the protective layer; And And an antistatic pattern spaced apart from the transparent conductive material pad and formed between the common line Vcom and the ground GND line. The method of claim 1, And a second transparent conductive material pad connected to an end of the gate line through the passivation layer. The method according to claim 1 or 2, And the first transparent conductive material pad and the second transparent conductive material pad are formed on the protective layer such that one end surface thereof has a quadrangular or circle shape. Forming a gate layer constituting the gate line and the gate electrode on the substrate; Forming a data layer on the gate layer that is insulated from and crosses the gate layer and constitutes a data line, a drain electrode, and a source electrode; Forming a protective layer to cover the data layer; Forming a first pad of transparent conductive material connected to an end of the data line through the passivation layer; And Forming an antistatic pattern between the common line (Vcom) and the ground (GND) line to be spaced apart from the transparent conductive material pad. The method of claim 4, wherein And forming a second transparent conductive material pad connected to the end of the gate line through the passivation layer. The method of claim 5, And the first transparent conductive material pad and the second transparent conductive material pad are formed on the protective layer such that one end surface thereof has a square or circle shape.

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