KR20060031335A - Liquid crystal display device - Google Patents

Abstract

The present invention discloses a liquid crystal display device that can improve the deterioration of the screen quality due to the push of the spacer spacer after bonding the liquid crystal panel. According to an exemplary embodiment of the present invention, a plurality of gate lines and a data line intersect each other, a thin film transistor is formed at an intersection between the lines, and a lower portion of the pixel electrode formed in a unit pixel region defined by the gate line and the data line. Board; An upper substrate disposed opposite the lower substrate and having a color filter and a common electrode; A strut spacer formed on a portion of the upper substrate corresponding to the intersection of the gate line and the data line of the lower substrate to maintain the gap between the lower substrate and the upper substrate; A liquid crystal layer interposed between the lower substrate and the upper substrate; And a dummy pattern formed to be spaced apart from the intersection of the gate line and the data line of the lower substrate to be in contact with the strut spacer so as to prevent the strut spacer from being pushed.

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY DEVICE}

1A is a plan view illustrating a strut spacer of a conventional liquid crystal display.

FIG. 1B is a cross-sectional view illustrating a AA ′ portion of FIG. 1. FIG.

2A and 2B are plan views illustrating a liquid crystal display according to an exemplary embodiment of the present invention.

 FIG. 3 is a cross-sectional view illustrating a method of manufacturing a liquid crystal display device according to an exemplary embodiment of the present invention and illustrating a portion B-B ′ of FIG. 2A.

4A to 4C are plan views illustrating a liquid crystal display according to another exemplary embodiment of the present invention.

FIG. 5A is a cross-sectional view showing a portion 'D-D' of FIG. 4A, FIG. 5B is a portion E-E 'of FIG. 4B, and FIG. 5C is a portion F-F' of FIG. 4C.

Explanation of symbols on the main parts of the drawings

21 substrate 22 gate line

23 gate insulating film 24 data line

25: protective film 26: holding spacer

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 capable of improving a screen quality deterioration due to post spacer push after liquid crystal panel bonding.

Liquid crystal displays have been developed in place of CRT (Cathode Ray Tube) based on the advantages of low weight, low voltage driving and low power consumption. In recent years, it has been widely used in various fields as well as the notebook PC and monitor market because it has realized large size and colorization. Such a TFT-LCD has a structure in which an array substrate with TFT and pixel electrodes and a color filter substrate with color filters and counter electrodes are bonded together through the liquid crystal layer.

Recently, liquid crystal displays use strut spacers to maintain a cell gap between two substrates. The strut spacer is less elastic than the conventional ball spacer, and is generally formed on the storage capacitor capacitor Cst formed on the flat gate line or the common electrode of the array unit.

Hereinafter, a liquid crystal display according to the related art will be described with reference to the accompanying drawings.

1A is a plan view illustrating a strut spacer of a conventional liquid crystal display, and FIG. 1B is a cross-sectional view illustrating an AA ′ portion of FIG. 1.

As shown in FIG. 1A, the gate line 2 and the data line 5 are formed to intersect on the insulating substrate 1, and the strut spacer 6 is spaced apart from the data line 5. It is formed on the gate line 2. As shown in FIG. 1B, after the gate line 2 is formed on the substrate 1, the gate insulating film 3 and the protective film 4 are sequentially formed on the gate line 2. Next, the strut spacer 6 is formed on the passivation layer 4.

However, as shown in FIGS. 1A to 1B, the strut spacer 5 formed at a flat position such as the storage capacitor formed on the gate line and the common electrode is pressed or pushed by the user with a high pressure. If it is, it is moved from the first place and has a characteristic of not being restored to its original state. Accordingly, there is a problem that a change occurs in the set cell gap, and thus the transmission amount is not uniformly formed at the portion, causing light leakage defects.

Accordingly, an object of the present invention is to provide a liquid crystal display device which can improve the screen quality deterioration due to the holding spacer sliding after the liquid crystal panel is attached, which has been devised to solve the above problems.

According to the present invention, a plurality of gate lines and a data line intersect each other, a thin film transistor is formed at an intersection between the lines, and a unit pixel area defined by the gate line and the data line is provided. A lower substrate on which a pixel electrode is formed; An upper substrate disposed opposite the lower substrate and having a color filter and a common electrode; A strut spacer formed on a portion of the upper substrate corresponding to the intersection of the gate line and the data line of the lower substrate to maintain the gap between the lower substrate and the upper substrate; A liquid crystal layer interposed between the lower substrate and the upper substrate; And a dummy pattern formed to be spaced apart from the intersection of the gate line and the data line of the lower substrate to be in contact with the strut spacer so as to prevent the strut spacer from being pushed.

Here, the dummy pattern is characterized by consisting of a stacked pattern formed together when forming the gate line and the data line.

The dummy pattern is characterized in that formed in a square or 'b' shape.

In addition, the present invention includes a lower substrate and an upper substrate disposed opposite; A plurality of gate lines formed on the lower substrate; A plurality of data lines formed to vertically intersect the gate lines; A thin film transistor formed at an intersection between the lines; A pixel electrode formed in the pixel region defined by the gate line and the data line; A color filter and a common electrode formed on the upper substrate; A strut spacer formed on a portion of the upper substrate corresponding to the intersection of the gate line and the data line of the lower substrate to maintain a gap between the substrates; A liquid crystal display device comprising a liquid crystal layer interposed between the lower substrate and the upper substrate, wherein at least one or more lines of the gate line and the data line are prevented from being pushed by the post spacer at an intersection thereof. Characterized in that formed separately.

Here, the gate line is characterized in that the intersection with the data line is formed by separating at least two or more lines.

The data line may be formed by separating an intersection with a gate line into at least two lines.

The gate line and the data line may be formed by separating intersections between at least two lines.

The gate line and the data line are characterized in that the intersection between them is formed in any one shape selected from the group consisting of ", "

(Example)

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

2A to 2B are plan views illustrating a liquid crystal display according to an exemplary embodiment of the present invention.

As shown in FIGS. 2A to 2B, the lower substrate 21 is formed such that the gate line 22 and the data line 24 cross each other, and an intersection portion of the gate line 22 and the data line 24 is formed. Dummy patterns 30a and 30b of a stacked structure are formed to be spaced apart from each other, and are formed in contact with the strut spacer to prevent the jig spacer from being pushed. In this case, the dummy patterns 30a and 30b are formed of the same material as the gate line and the data line while forming the gate line 22 and the data line 24. Here, the dummy patterns 30a and 30b are formed in a square or "b" shape and are formed to have a spacing of 4 μm or more at the intersection of the gate line 22 and the data line 24. In addition, the distance between the intersection of the gate line 22 and the data line 24 and the dummy pattern should be smaller than the size of the strut spacer.

FIG. 3 is a cross-sectional view illustrating a method of manufacturing a liquid crystal display according to an exemplary embodiment of the present invention, which is taken along line B-B 'of FIG. 2A.

As shown in FIG. 3, the gate line 22 is formed on the lower substrate 21 and the first material is spaced apart from the intersection of the data line and the gate line when the subsequent data line is formed of the same material as the gate line. The dummy pattern 32 is formed. Next, a gate insulating layer 23, an active layer (not shown), and an ohmic layer (not shown) are sequentially formed on the substrate resultant. Subsequently, the active layer and the ohmic layer are removed except for the intersection of the region where the channel is to be formed later and the gate line 22 and the data line.

Next, a data line 24 made of source / drain electrodes is formed on the substrate resultant, and at the same time, the same material as the data line 24 is spaced apart from the intersection of the gate line 22 and the data line 24. The second dummy pattern 34 is formed. Subsequently, after forming the passivation layer 25 on the substrate resultant, the passivation layer is patterned to form a pixel electrode (not shown) on the passivation layer 25.

Subsequently, a black matrix is formed on the insulating substrate, a color filter composed of red, green, and blue is formed, and then a post spacer is formed to complete the upper substrate. Subsequently, when the lower substrate and the upper substrate are bonded to each other, the pillar spacers may be positioned at portions of the uneven pattern C to prevent the pillar spacers from being pushed by the intersections of the gate lines and the data lines and the patterns adjacent thereto.

4A to 4C are plan views illustrating a liquid crystal display according to another exemplary embodiment of the present invention.

As shown in FIG. 4A, a gate line 42a is formed on the lower substrate 41, and a data line 44a is formed to vertically cross the gate line 42a. In this case, the gate line 42a and the data line 44a are formed by separating at least one or more lines into two or more lines at the intersections between the lines so as to prevent the holding spacers from being pushed. Here, the gate line 42a is formed of one line, and the data line 44a is "||". It is formed into a mold.

In addition, as shown in FIG. 4B, the gate line 42b is formed on the lower substrate in a shape of "W", and the data line 44b is formed of "|". It is formed into a mold. As shown in Fig. 4C, the gate line 42c is formed in the shape of ". &Quot;, and the data line 44c is in the " || " It is formed into a mold. Here, reference numeral 43 denotes a gate insulating film, and 45 denotes a protective film.

5A is a cross-sectional view showing a portion D-D 'of FIG. 4A, FIG. 5B is a portion E-E' of FIG. 4B, and FIG. 5C is a portion F-F 'of FIG. 4C, wherein the upper substrate and the lower substrate are bonded together. The strut spacer 46 formed at the bottom portion is located at the uneven pattern portions G, G 'and G' 'having a low level of the lower substrate, thereby preventing the strut spacer from being pushed in the horizontal or vertical direction. In addition, as shown in FIG. 5C, when the gate line and the data line are formed, the post spacers can be prevented from sliding in the horizontal and vertical directions.

In the above, the present invention has been described with reference to some examples, but the present invention is not limited thereto, and those skilled in the art may make many modifications and variations without departing from the spirit of the present invention. It will be appreciated.

As described above, the present invention forms the gate line and the data line and simultaneously forms the dummy pattern with the same material so that the holding spacers are located at the dummy pattern part of the uneven shape when the liquid crystal panel is bonded without additional process. The sliding phenomenon of the strut spacer caused by the intersection of the line and the data line and the pattern adjacent thereto can be prevented. In addition, the degradation of the screen quality can be improved by preventing the post spacer from being pushed.

Claims (8)

A lower substrate having a plurality of gate lines and data lines intersecting, a thin film transistor formed at an intersection between the lines, and a pixel electrode formed in a unit pixel area defined by the gate line and the data line; An upper substrate disposed opposite the lower substrate and having a color filter and a common electrode; A strut spacer formed on a portion of the upper substrate corresponding to the intersection of the gate line and the data line of the lower substrate to maintain the gap between the lower substrate and the upper substrate; A liquid crystal layer interposed between the lower substrate and the upper substrate; And And a dummy pattern formed to be spaced apart from the intersection of the gate line and the data line of the lower substrate to be in contact with the strut spacer so as to prevent the strut spacer from being pushed. The method of claim 1, And the dummy pattern is formed of a stacked pattern formed when the gate line and the data line are formed. The method of claim 1, And the dummy pattern is formed in a square or 'b' shape. A lower substrate and an upper substrate disposed to face each other; A plurality of gate lines formed on the lower substrate; A plurality of data lines formed to vertically intersect the gate lines; A thin film transistor formed at an intersection between the lines; A pixel electrode formed in the pixel region defined by the gate line and the data line; A color filter and a common electrode formed on the upper substrate; A strut spacer formed on a portion of the upper substrate corresponding to the intersection of the gate line and the data line of the lower substrate to maintain a gap between the substrates; In the liquid crystal display device including a liquid crystal layer interposed between the lower substrate and the upper substrate, And the gate line and the data line are separated into at least one or more lines so that at least one or more of the gate lines and the data lines are prevented from being pushed by the post spacers. The liquid crystal display of claim 4, wherein the gate line is formed by separating an intersection with a data line into at least two lines. The liquid crystal display of claim 4, wherein the data line is formed by separating an intersection portion with a gate line into at least two lines. 5. The liquid crystal display device according to claim 4, wherein the gate line and the data line are each formed by at least two or more lines having intersections therebetween. 8. The gate line and the data line according to any one of claims 4 to 7, wherein the gate line and the data line are formed in any one shape selected from the group consisting of ", " A liquid crystal display device.

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