KR20140139891A - Liquid crystal display and manufacturing method thereof - Google Patents

Abstract

Provided are a liquid crystal display device and a manufacturing method thereof, capable of removing a light leakage phenomenon generated on the upper side of a liquid crystal display device by preventing the splitting of rubbing cloth in a rubbing process by forming a dummy line on the non-display region of an array substrate in the same direction as a rubbing direction.

Description

[0001] The present invention relates to a liquid crystal display and a manufacturing method thereof,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device including an array substrate capable of preventing a light leakage phenomenon due to data link wiring in a rubbing process, and a manufacturing method thereof.

2. Description of the Related Art [0002] Recently, many display devices that serve as convenient interfaces between people and information through visual representation of a variety of information have been developed, and a flat panel display (CRT), which is a substitute for CRT (Cathode Ray Tube) ; FPD) are being studied and commercialized.

In such flat panel display devices, liquid crystal display devices (LCDs) are widely used. A liquid crystal display device is driven by using optical anisotropy and polarizability of a liquid crystal. That is, light is refracted and image information is displayed by changing the molecular arrangement by adjusting the molecular alignment direction of the liquid crystal.

Fig. 1 is a plan view of an array substrate of a conventional liquid crystal display, Fig. 2 is an enlarged view of a portion A in Fig. 1, and Fig. 3 is a cross-sectional view of Fig. 2 taken along line III-III '.

Referring to FIGS. 1 and 2, an array substrate 10 of a conventional liquid crystal display device includes a display area A / A and a non-display area N / A. The array substrate 10 is bonded to a color filter substrate (not shown), and a liquid crystal layer (not shown) is interposed between the two bonded substrates to complete a liquid crystal display device.

A plurality of gate lines (not shown) and a plurality of data lines DL are formed in the display area A / A of the array substrate 10 so as to intersect with each other. A plurality of pixels (not shown) are formed at intersections of the gate lines and the data lines DL, and thin film transistors (not shown) are formed at the intersections.

A plurality of gate link lines (not shown) are formed extending from the gate lines in the non-display area N / A of the array substrate 10, and a plurality of data link lines 20 extending from the data lines DL .

The plurality of gate link lines and the data link lines 20 are formed to be inclined from the gate lines and the data lines DL to diagonal lines, respectively.

At the end of the gate link line, at least one gate pad portion (not shown) including a plurality of pads is formed and connected to an external gate driving circuit (not shown).

One or more data pad portions 31a and 31b including a plurality of pads 33a and 33b are formed at the end of the data link line 20 and connected to an external data driving circuit (not shown).

A plurality of dummy lines 25 are formed in the non-display area N / A between the adjacent data pad parts 31a and 31b so as not to be connected to the data line DL or the plurality of pads 33a and 33b. .

A plurality of dummy lines 25 are formed in parallel with the data link line 20. [ For example, a first dummy line 25a and a second dummy line 25b are formed between the first data pad portion 31a and the second data pad portion 33a.

The first dummy line 25a is formed in parallel with the data link line 20 connected to the first data pad portion 31a and the second dummy line 25b is formed in parallel with the data link line 20b connected to the second data pad portion 31b. And is formed in parallel with the line 20.

2 and 3, a gate insulating film 13 is formed on the array substrate 10, and a data link line 20 and a dummy line 25a are formed on the gate insulating film 13. The data link line 20 and the dummy line 25a are formed to be inclined at a predetermined angle? To the data line DL. The data link line 20 and the dummy line 25a are formed of the same material in the same layer as the data line DL.

A protection layer 15 is formed on the data link line 20 and the dummy line 25a and an alignment film (not shown) is formed on the protection layer 15 for the alignment of the liquid crystal. The alignment film is also formed on the color filter substrate.

The array substrate 10 described above performs a process of rubbing the alignment film to orient the liquid crystal in one direction. The rubbing process of the alignment layer rubs the surface of the alignment layer by contacting the rubbing roller with the rubbing layer to the alignment layer, thereby forming a pretilt angle in the alignment layer to orient the liquid crystal in a specific direction. The rubbing process of the orientation film proceeds also on the color filter substrate.

In recent years, attempts have been made to improve the viewing angle characteristics by forming the upper portion of the liquid crystal display device to be dark. For this purpose, the upper side of the liquid crystal display device, that is, the non-display area N / A on the upper side of the array substrate 10 on which the plurality of data pad parts 31a and 31b are formed, Process, that is, reversed anti-parallel rubbing is performed to improve the upper viewing angle characteristic of the liquid crystal display device.

However, since the above-described data link line 20 and dummy line 25 form a certain angle? With respect to the data line DL, (25) in an oblique direction.

Such a cleavage phenomenon causes light leakage at the upper portion of the liquid crystal display device, thereby deteriorating the quality of the liquid crystal display device.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid crystal display device and a method of manufacturing the same that can eliminate the light leakage phenomenon generated in the upper portion of a liquid crystal display device.

According to an aspect of the present invention, there is provided a liquid crystal display device including a substrate having a display area and a non-display area defined therein; A plurality of data lines formed in one direction in the display area; One or more data pad portions formed in the non-display region and including a plurality of pads connected to an external driving circuit; And at least one dummy line formed in the non-display region between the adjacent data pad portions in the same direction as the plurality of data lines.

According to an aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, including: forming a gate insulating film on a substrate on which a display region and a non-display region are defined; Forming a plurality of data lines in one direction in the display area; Forming at least one data pad portion including a plurality of pads connected to an external driving circuit in the non-display region; Forming one or more dummy lines in the same direction as the plurality of data lines between adjacent data pad portions of the non-display region; Forming a protective layer on the data line and the dummy line, and forming an alignment layer on the protective layer; And rubbing the alignment layer in the data line direction.

According to the liquid crystal display device and the manufacturing method thereof of the present invention, the dummy lines formed in the non-display area of the array substrate are formed in the same direction as the rubbing direction, thereby preventing the rubbing of the rubbing cloth by the dummy lines, The light leakage phenomenon occurring at the upper portion of the display device can be eliminated.

In addition, by forming the data link line in the non-display area as much as possible in the same direction as the data line, the extended portion of the dummy line and the data link line can prevent the rubbing of the rubbing cloth during the rubbing process, It is possible to eliminate the light leakage phenomenon generated in the light source.

1 is a plan view of an array substrate of a conventional liquid crystal display device.
2 is an enlarged view of a portion A in Fig.
Fig. 3 is a cross-sectional view of Fig. 2 taken along line III-III '.
4 is a plan view of an array substrate of a liquid crystal display according to an embodiment of the present invention.
Fig. 5A is a cross-sectional view of Fig. 4 taken along line Va-Va '.
FIG. 5B is a cross-sectional view of FIG. 4 taken along line Vb-Vb '.
6 is a plan view of an array substrate of a liquid crystal display device according to another embodiment of the present invention.
FIG. 7 is a cross-sectional view of FIG. 6 taken along line VII-VII '.

Hereinafter, a liquid crystal display device according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 4A is a cross-sectional view taken along line Va-Vb 'in FIG. 4, and FIG. 5B is a cross-sectional view taken along line Vb-Vb' of FIG. Fig.

Referring to FIG. 4, the array substrate 100 of the present invention may include a plurality of gate lines GL and a plurality of data lines DL formed on an insulating substrate 105 so as to intersect with each other. For example, a display area A / A and a non-display area N / A are defined in the insulating substrate 105. A plurality of gate lines GL and a plurality of data lines DL are formed in the display area A / A).

A plurality of pixels (not shown) are formed in a region where the gate line GL and the data line DL intersect each other in the display region A / A thin film transistor (not shown) may be formed. The thin film transistor can be operated by the gate line GL and the data line DL.

Meanwhile, although not shown in the drawing, a transparent pixel electrode connected to the thin film transistor may be formed in each of the plurality of pixels. The pixel electrode may be formed of indium-tin-oxide (ITO), indium-zinc-oxide (IZO), or the like. An image signal may be provided to the pixel electrode through the data line DL.

The thin film transistor includes a gate electrode (not shown) extending from the gate line GL to the pixel, a gate insulating film (not shown) covering the gate electrode, a semiconductor layer (not shown) above the gate insulating film, And a protective layer (not shown) having contact holes for exposing a part of the source and drain electrodes (not shown) and the drain electrodes that are spaced apart from each other. The pixel electrode may be in contact with the drain electrode through the contact hole.

A plurality of gate link lines (not shown) connected to a plurality of gate lines GL may be formed in one non-display area N / A of the insulating substrate 105.

In addition, one or more gate pad portions (not shown) connected to a plurality of gate link lines may be formed in one non-display region N / A. The gate pad portion may include a plurality of pads, wherein the plurality of pads may be connected to an external driving circuit, that is, a gate driving circuit.

That is, the gate link line receives a driving signal from the gate driving circuit through a plurality of pads of the gate pad portion, and can transmit the driving signal to the thin film transistor through the gate line GL.

A plurality of data link lines 110 connected to a plurality of data lines DL may be formed in the upper non-display area N / A of the insulating substrate 105. [

One or more data pad units 130 and 140 connected to the plurality of data link lines 110 are formed in the upper non-display area N / A. Each of the data pad units 130 and 140 includes a plurality of Pads 131 and 141, respectively.

Here, the plurality of data link lines 110 may be formed to be inclined at a predetermined angle with the plurality of data lines DL.

5A, a data link line 110 connected to a plurality of pads 131 of the first data pad unit 130 among the plurality of data link lines 110 includes a data line DL, And may be formed to be inclined at an angle [theta] 1.

5B, among the plurality of data link lines 110, the data link line 110 connected to the plurality of pads 141 of the second data pad unit 140 is connected to the data line DL, And the second angle? 2.

4, the plurality of data link lines 110 are formed obliquely from the display area A / A of the insulating substrate 105 and the boundary BL of the non-display area N / A And may be connected to a plurality of pads 131 and 141 of the respective data pad units 130 and 140.

Accordingly, a predetermined space may be formed between the data pad portions adjacent to each other, that is, between the first data pad portion 130 and the second data pad portion 140. One or more dummy lines 120 may be formed in this space, i.e., the non-display area N / A.

The dummy line 120 may be formed in a strip shape, that is, in parallel with the data line DL, in a space between two adjacent data pad portions.

One end of the dummy line 120 may be aligned with the ends of the plurality of pads 131 and 141 of the data pad units 130 and 140 while the other end of the dummy line 120 may be aligned with the data line 110 and / And may extend to a boundary BL between the display area A / A and the non-display area N / A within a range not contacting the plurality of data lines DL. In some cases, one end of the dummy line 120 may be formed so as to be aligned with the end of the non-display area N / A, that is, the upper end of the insulating substrate 105.

5A and 5B, the dummy lines 120 may be formed in parallel with the data lines DL in the same direction. Thus, during the rubbing process, As shown in FIG.

Meanwhile, the plurality of data link lines 110 and the plurality of dummy lines 120 may be formed on the same layer with the same material as the data lines DL.

In other words, a gate insulating film 103 is formed on the insulating substrate 105, and a data link line 110 inclined at a first angle? 1 with the data line DL is formed on the gate insulating film 103, The data link line 110 inclined at the angle [theta] 2 may be formed. One or more dummy lines 120 may be formed in the space between the data link lines 110 in the same direction as the data lines DL.

A protective layer 107 is formed on the data link line 110 and the dummy line 120 and an alignment layer (not shown) may be formed on the protective layer 107.

The array substrate 100 formed up to the alignment layer can perform a rubbing process so as to add a certain directionality to the alignment layer.

The upper non-display area N / A of the array substrate 100, on which the data pads 130 and 140 are formed, is formed on the upper side of the array substrate 100 in order to improve the upper viewing angle characteristic of the liquid crystal display device. The rubbing process can be performed in one direction, that is, the direction of the data line DL.

At this time, the rubbing cloth may be in contact with the dummy line 120 of the array substrate 100, and the dubbing line 120 may hold the rubbing cloth in the data line DL direction.

In other words, in the present invention, since the dummy line 120 is formed in the same direction as the data line DL, the rubbing direction of the rubbing cloth is coincided with the rubbing direction of the rubbing cloth, Lt; / RTI >

FIG. 6 is a plan view of an array substrate of a liquid crystal display device according to another embodiment of the present invention, and FIG. 7 is a cross-sectional view taken along line VII-VII 'of FIG.

The array substrate 101 of the present embodiment may have the same configuration as the array substrate 100 according to the embodiment of the present invention described above with reference to FIG.

That is, the array substrate 101 of the present embodiment is the same as the array substrate 100 of FIG. 4 except that the extension portion 113 and the bent portion 111 are formed in the data link line 110, A description thereof will be omitted.

Referring to FIG. 6, the array substrate 101 of the present embodiment may include a plurality of gate lines GL and a plurality of data lines DL formed on the insulating substrate 105 so as to intersect with each other.

A display area A / A and a non-display area N / A are defined in the insulating substrate 105, and a plurality of gate lines GL and data lines DL are defined in the display area A / A plurality of pixels (not shown) may be formed in the intersection region, and a plurality of thin film transistors (not shown) may be formed at the intersections.

A plurality of gate link lines (not shown) connected to the plurality of gate lines GL and one or more gate pads (not shown) connected to the plurality of gate link lines are formed in one non-display area N / A of the insulating substrate 105, (Not shown) may be formed. Each of the gate pad portions may include a plurality of pads connected to a gate driving circuit.

A plurality of data link lines 110 connected to a plurality of data lines DL may be formed in the upper non-display area N / A of the insulating substrate 105. [

One or more data pad units 130 and 140 connected to the plurality of data link lines 110 are formed in the upper non-display area N / A. Each of the data pad units 130 and 140 includes a plurality of Pads 131 and 141, respectively.

Here, the plurality of data link lines 110 may include an extension portion 113 and a bent portion 111.

The extended portion 113 of the data link line 110 is connected to the data pad portions 130 and 140 at the boundary BL between the display region A / A and the non-display region N / A of the insulating substrate 105 The data line DL can be extended to the adjacent portion as much as possible. That is, the extending portions 113 may be formed in the same direction as the data lines DL.

The bent portion 111 of the data link line 110 may extend from the end of the extended portion 113 to a plurality of pads 131 and 141 of the data pad portions 130 and 140. The bent portion 111 may be formed obliquely so as to be inclined at a predetermined angle with the extended portion 113 or the data line DL.

In addition, one or more dummy lines 120 may be formed in a space between the first data pad unit 130 and the second data pad unit 140 adjacent to each other.

The dummy line 120 may be formed in the same direction as the data line DL and one end of the dummy line 120 may be aligned with the ends of the plurality of pads 131 and 141 of the data pad units 130 and 140 And the other end may extend to a boundary BL between the display area A / A and the non-display area N / A within a range not contacting the plurality of data link lines 110.

In some cases, one end of the dummy line 120 may be formed so as to be aligned with the end of the non-display area N / A, that is, the upper end of the insulating substrate 105.

Referring to FIG. 7, a plurality of data link lines 110 and a plurality of dummy lines 120 may be formed on the same layer with the same material as a plurality of data lines DL.

In other words, the gate insulating film 103 may be formed on the insulating substrate 105, and the data link line 110 and the dummy line 120 may be formed on the gate insulating film 103.

Here, the extended portion 113 and the dummy line 120 of the data link line 110 may be formed in the same direction as the data line DL.

The bent portion 111 of the data link line 110 may be formed obliquely so as to be inclined at a predetermined angle with the extended portion 113 or the data line DL.

A protective layer 107 is formed on the data link line 110 and the dummy line 120 formed in this manner and an alignment layer (not shown) may be formed on the protective layer 107.

The array substrate 101 thus formed up to the alignment film can perform a rubbing process in order to impart a certain directionality to the alignment film.

The rubbing process may be performed along the direction of the data line DL from the upper non-display area N / A of the array substrate 101 on which the data pad portions 130 and 140 are formed.

At this time, the rubbing cloth may first contact the dummy line 120 of the array substrate 101, and may contact the extension portion 113 of the data link line 110 as the rubbing process proceeds. Thus, the defocusing of the rubbing cloth can be maintained in the data line DL direction.

In other words, in the present invention, the dummy line 120 having the same direction as that of the data line DL maintains the roving of the rubbing cloth and the extension of the data link line 110 having the same direction as the data line DL As the portion 113 maintains the second rubbing of the rubbing cloth, the entrapment of the rubbing cloth can be maintained in the direction of the data line DL, that is, the rubbing direction during the rubbing step.

While a number of embodiments have been described in detail above, it should be construed as being illustrative of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be construed as limited to the embodiments described, but should be determined by equivalents to the appended claims and the claims.

110: Data link line 120: Dummy line
130, 140: a data pad unit 131, 141: a pad

Claims (12)

A substrate on which a display area and a non-display area are defined;
A plurality of data lines formed in one direction in the display area;
One or more data pad portions formed in the non-display region and including a plurality of pads connected to an external driving circuit; And
And one or more dummy lines formed in the non-display region between the adjacent data pad portions in the same direction as the plurality of data lines. The method according to claim 1,
And one end of the dummy line is aligned with an end of the plurality of pads and the other end of the dummy line extends to a boundary between the display region and the non-display region so as not to contact the plurality of data lines. The method according to claim 1,
Wherein the dummy lines are formed on the same layer with the same material as the data lines. The method according to claim 1,
And a plurality of data link lines connecting the plurality of pads and each of the plurality of data lines so as not to be in contact with the dummy line. 5. The method of claim 4,
Wherein each of the plurality of data link lines is obliquely inclined to the data line. 5. The method of claim 4,
Each of the plurality of data link lines includes an extended portion extending in the same direction as the data line and a bent portion formed to extend from the end of the extended portion to each of the plurality of pads and to be inclined to the extended portion . Forming a gate insulating film on a substrate on which a display region and a non-display region are defined;
Forming a plurality of data lines in one direction in the display area;
Forming at least one data pad portion including a plurality of pads connected to an external driving circuit in the non-display region;
Forming one or more dummy lines in the same direction as the plurality of data lines between adjacent data pad portions of the non-display region;
Forming a protective layer on the data line and the dummy line, and forming an alignment layer on the protective layer; And
And rubbing the alignment film in the direction of the data line. 8. The method of claim 7,
The step of forming the dummy line may include aligning one end of the dummy line with the ends of the plurality of pads and extending the other end to the boundary between the display area and the non-display area so as not to contact the plurality of data lines And forming a liquid crystal layer on the substrate. 8. The method of claim 7,
Wherein the dummy lines are formed on the same layer with the same material as the data lines. 8. The method of claim 7,
And forming a plurality of data link lines connecting the plurality of pads and each of the plurality of data lines so as not to be in contact with the dummy line in the non-display area. 11. The method of claim 10,
Wherein the forming of the plurality of data link lines comprises forming each of the plurality of data link lines obliquely so as to be inclined to the data line. 11. The method of claim 10,
Wherein forming the plurality of data link lines comprises forming an extension extending in the same direction as the data line and forming a bend extending from an end of the extension to each of the plurality of pads, And the second electrode is formed obliquely so as to be inclined to the second electrode.

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