KR20060134760A - Liquid crystal display pannel and fabricating method thereof - Google Patents

Abstract

An LCD panel and a method for manufacturing the same are provided to prevent the movement of ball spacers, thereby preventing the leakage of light due to movement of the ball spacers, by respectively forming the ball spacers in well-shaped color patterns. An LCD panel comprises a lower substrate and an upper substrate. The upper substrate includes a black matrix(118), color filters(112), and well-shaped color patterns(120). The black matrix prevents the leakage of light and defines cell regions. The color filters are respectively formed in the cell regions. The well-shaped color patterns are formed on the black matrix. Fixing type of ball spacers (113) maintain the gap between the upper substrate and the lower substrate, wherein the ball spacers are respectively contained in the well-shaped color patterns.

Description

Liquid crystal display panel and its manufacturing method {LIQUID CRYSTAL DISPLAY PANNEL AND FABRICATING METHOD THEREOF}

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

2 is a cross-sectional view showing a fixed ball spacer for maintaining a cell gap between a conventional color filter substrate and a thin film transistor substrate.

3 is a plan view illustrating a color filter substrate of a liquid crystal display panel according to an exemplary embodiment of the present invention.

4 is a cross-sectional view taken along the line II ′ of FIG. 3.

5A to 5C are cross-sectional views illustrating in detail a method of manufacturing the black matrix shown in FIG. 4.

6A to 6C are cross-sectional views illustrating in detail a method of manufacturing a red color filter and a red color pattern shown in FIG. 4;

7A to 7C are cross-sectional views illustrating in detail the manufacturing method of the green color filter and the green color pattern shown in FIG.

8A to 8C are cross-sectional views illustrating in detail a method of manufacturing the blue color filter and the blue color pattern shown in FIG. 4;

9A and 9B are cross-sectional views illustrating a method of manufacturing the common electrode and the fixed ball spacer shown in FIG. 4 in detail.

<Explanation of symbols for main parts of drawing>

1, 101: lower substrate 2: gate line

4 data line 6 gate insulating film

11, 111: upper substrate 12, 112: color filter

13, 113: fixed ball spacer 14, 114: common electrode

16: liquid crystal 18, 118: black matrix

20, 120: color pattern 22: pixel electrode

30 thin film transistor 140 inkjet

144: Well

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 method of manufacturing the same that can prevent the movement of the ball spacer.

In general, a liquid crystal display (LCD) displays an image by adjusting the light transmittance of the liquid crystal using an electric field. As shown in FIG. 1, the liquid crystal display panel includes a thin film transistor substrate 70 and a color filter substrate 80 that face each other with the liquid crystal 16 therebetween.

The color filter substrate 80 includes a black matrix 18 for preventing light leakage, a color filter 12 for implementing color, a common electrode 14 forming a vertical electric field with the pixel electrode 22, and a liquid crystal alignment thereon. A color filter array including an upper alignment layer coated for the purpose is formed on the upper substrate 11.

The thin film transistor substrate 70 includes a gate line 2 and a data line 4 formed to cross each other, a thin film transistor 30 formed at an intersection of them 2 and 4, and a thin film transistor 30 connected to the thin film transistor 30. A thin film transistor array including a pixel electrode 22 and a lower alignment film coated thereon for liquid crystal alignment is formed on the lower substrate 1.

Referring to FIG. 2, the cell gap of the color filter substrate 80 and the thin film transistor substrate 70 is maintained by the fixed ball spacers 13, and the fixed ball spacers 13 may include ink jets (InkJet) and the like. Is formed on the gate line 2 or the data line (not shown) overlapping with the black matrix 18.

Meanwhile, the fixed ball spacers 13 for maintaining the cell gap between the color filter substrate 80 and the thin film transistor substrate 70 are spherical in shape and are applied to the liquid crystal display panel from the outside. In particular, the liquid crystal in the vibration / impact test, which is one of a process of attaching a polarizing plate to the outer surface of the upper substrate 11 and the lower substrate 1 after bonding the color filter substrate 80 and the thin film transistor substrate 70 or reliability test. The shock applied to the display panel may be easily moved within the liquid crystal display panel.

The movement of the fixed ball spacer 13 interferes with the light transmittance of the liquid crystal 16 to generate light leakage, which causes a defect in generating bright spots in the liquid crystal display panel.

In addition, the fixed ball spacer 13 moves inside the liquid crystal display panel by an impact from the outside and is positioned on the pixel electrode 22, that is, on the display area of the liquid crystal display panel, not on the gate line 2 or the data line. In this case, there is a disadvantage in that the aperture ratio of the liquid crystal display panel is reduced.

Accordingly, it is an object of the present invention to provide a liquid crystal display panel and a method of manufacturing the same that can prevent movement of the fixed ball spacer.

In order to achieve the above object, the liquid crystal display panel according to an embodiment of the present invention and the lower substrate; A black matrix facing the lower substrate and preventing light leakage and partitioning a cell region, a color filter formed in a cell region partitioned by the black matrix, and a well-shaped color pattern formed on the black matrix; An upper substrate having a branch; A fixing ball spacer is provided within the well-shaped color pattern while maintaining a gap between the upper substrate and the lower substrate.

The well-shaped color pattern is formed by stacking at least one color pattern of a red color pattern, a green color pattern, and a blue color pattern on the black matrix.

The well-shaped color pattern is formed below the width of the black matrix.

The well-shaped color pattern becomes narrower from the lower layer to the upper layer.

The well-shaped color pattern has the same width of each layer.

The fixed ball spacer is formed to be accommodated in the well-shaped color pattern using an inkjet.

The well-shaped color pattern is the same material as the color filter.

The liquid crystal display panel further includes a common electrode formed on the color filter.

According to an aspect of the present invention, there is provided a method of manufacturing a liquid crystal display panel, including: forming a black matrix that prevents light leakage and partitions a cell region; Forming an upper substrate by forming a color filter and a well-shaped color pattern on the black matrix in a cell region partitioned by the black matrix; Providing a lower substrate facing the upper substrate; Forming a fixed ball spacer accommodated in the well-shaped color pattern while maintaining a gap between the upper substrate and the lower substrate; Bonding the upper and lower substrates together;

Other objects and features of the present invention in addition to the above objects will be apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 3 to 9B.

3 is a plan view illustrating a color filter substrate of a liquid crystal display panel according to an exemplary embodiment of the present invention, and FIG. 4 is a cross-sectional view taken along the line II ′ of FIG. 3.

3 and 4, a color filter substrate of a liquid crystal display panel according to an exemplary embodiment of the present invention includes a black matrix 118, a color filter 112, and a color pattern 120 formed on the upper substrate 111. ) And a common electrode 114 and a fixed ball spacer 113.

The black matrix 118 is formed in a matrix form on the upper substrate 111 to partition a plurality of cell regions in which the color filters 112 are to be formed and to prevent light leakage. The black matrix 118 is formed so as to overlap with regions other than the pixel electrode of the thin film transistor substrate (not shown), that is, the gate line, the data line, and the thin film transistor.

The color filter 112 is formed in the cell region partitioned by the black matrix 118. The color filter 112 is formed for each of R, G, and B to implement R, G, and B colors.

The color pattern 120 is formed on the black matrix 118 in a shape of a well 144 having a space in which the fixed ball spacer 113 can be accommodated, and the fixed ball spacer 113 is formed in the color pattern 120. It is formed to be accommodated in the inner space of the color pattern 120, that is, the well 144, directly using an inkjet or the like. In this case, the well 144 in which the fixed ball spacer 113 is accommodated may be variously formed in a polygonal shape whose shape includes a circle or a triangle and a rectangle.

The color pattern 120 is formed of at least one or more different color patterns 120 on the black matrix 118.

Hereinafter, in the description related to the present invention, the color pattern 120 in which the red color pattern 120R, the green color pattern 120G, and the blue color pattern 120B are sequentially stacked will be described as an example.

The red color pattern 120R is formed on the black matrix 118 to have a well 144 shape. The green color pattern 120G is formed in the shape of the well 144 overlapping the red color pattern 120R and is the same width or smaller than the red color pattern 120R. The blue color pattern 120B is formed in a shape of a well 144 overlapping the shape of the well 144 of the green color pattern 120G. The blue color pattern 120B is formed to have a width equal to or smaller than that of the green color pattern 120G. Each of the red, green, and blue patterns 120R, 120G, and 120B is formed of the same material at the same time as the red, green, and blue color filters 112.

The common electrode 114 is formed on the upper substrate 111 on which the color filter 112, the color pattern 120, and the black matrix 118 are formed, and is supplied with a reference voltage for driving the liquid crystal.

The fixed ball spacer 113 serves to maintain a cell gap between the color filter substrate and the thin film transistor substrate. The fixed ball spacer 113 is formed on the upper substrate 111 to overlap at least one of the gate line, the data line, and the thin film transistor formed on the thin film transistor substrate. At this time, the fixed ball spacer 113 is directly formed in the inner well 144 of the color pattern 120 using inkjet or the like in the inner well 144 of the color pattern 120.

As described above, the fixed ball spacer of the liquid crystal display panel according to the exemplary embodiment of the present invention is accommodated in the well 144 provided by the color pattern 120 formed at the same time as the color filter 112. Accordingly, the fixed ball spacer 113 does not move the inside of the liquid crystal display panel by an impact applied to the liquid crystal display panel from the outside during the process by the color pattern 120 accommodating the fixed ball spacer 113. As a result, light leakage due to the movement of the fixed ball spacer 113 and reduction of the aperture ratio of the liquid crystal display panel can be prevented.

Hereinafter, a method of manufacturing a liquid crystal display panel according to an exemplary embodiment of the present invention will be described in detail with reference to FIGS. 5A to 9B.

5A to 5C are views for explaining a process of forming a black matrix of a color filter array substrate of a liquid crystal display panel according to the present invention.

Referring to FIG. 5A, an opaque material 118a is entirely coated on the upper substrate 111. As the opaque material 118a, an opaque metal or opaque resin containing chromium (Cr) is used. Subsequently, after the photoresist is entirely formed on the opaque material 118a, the first mask 100 is aligned on the upper substrate 111 as shown in FIG. 5B. The first mask 100 includes a mask substrate 102 formed of a transparent material and the exposed area becomes an exposure area S1, and a blocking part 104 formed in the blocking area S2 of the mask substrate 102. do.

The photoresist pattern 106 is formed in the blocking region S2 corresponding to the blocking portion 104 of the first mask 100 by exposing and developing the photoresist using the first mask 100. As the opaque material 118a is patterned by an etching process using the photoresist pattern 106, the black matrix 118 is formed as shown in FIG. 5C.

6A to 6C are cross-sectional views illustrating a process of forming a red color filter and a red color pattern of a color filter substrate of a liquid crystal display panel according to the present invention.

Referring to FIG. 6A, a red resin 118 is entirely coated on the upper substrate 111 on which the black matrix 118 is formed. Subsequently, after the photoresist is completely coated on the red resin 128, the second mask 110 is aligned on the upper substrate 111 as shown in FIG. 6B. The second mask 110 includes a mask substrate 122 formed of a transparent material and the exposed area becomes an exposure area S1, and a blocking part 124 formed in the blocking area S2 of the mask substrate 122. do.

The photoresist pattern 126 is formed in the blocking region S2 corresponding to the blocking portion 124 of the second mask 110 by exposing and developing the photoresist using the second mask 110. The red resin 128 is patterned by an etching process using the photoresist pattern 126 to form a red color filter 112R and a red color pattern 120R as shown in FIG. 6C. Here, the red color pattern 120R is formed on the black matrix 118 in the shape of a well 144a having a space in which the fixed ball spacer 113 may be accommodated.

7A to 7C are cross-sectional views illustrating a green color filter and a green color pattern forming process of an upper array substrate of a liquid crystal display panel according to the present invention.

Referring to FIG. 7A, a green resin 138 is entirely coated on the upper substrate 111 on which the red color filter 112R and the red color pattern 120R are formed. Subsequently, after the photoresist is entirely formed on the green resin 138, the third mask 130 is aligned on the upper substrate 111 as shown in FIG. 7B. The third mask 130 includes a mask substrate 132 formed of a transparent material and the exposed area becomes an exposure area S1, and a blocking part 134 formed in the blocking area S2 of the mask substrate 132. do.

The photoresist pattern 136 is formed in the blocking region S2 corresponding to the blocking portion 134 of the third mask 130 by exposing and developing the photoresist using the third mask 130. The green resin 138 is patterned by an etching process using the photoresist pattern 136 to form the green color filter 112G and the green color pattern 120G as shown in FIG. 7C. Here, the green color pattern 120G has a well 144a formed by the red color pattern 120R in a shape of a well 144b having a space in which the fixed ball spacer 113 can be accommodated. It is formed to overlap.

8A to 8C are cross-sectional views illustrating a process of forming a blue color filter and a blue color pattern of a color filter substrate of a liquid crystal display panel according to the present invention.

Referring to FIG. 8A, a blue resin 158 is entirely coated on the upper substrate 111 on which the green color filter 112G and the green color pattern 120G are formed. Subsequently, after the photoresist is entirely formed on the blue resin 158, the fourth mask 150 is aligned on the upper substrate 111 as shown in FIG. 8B. The fourth mask 150 includes a mask substrate 152 formed of a transparent material and the exposed area becomes an exposure area S1, and a blocking part 154 formed in the blocking area S2 of the mask substrate 152. do.

The photoresist pattern 156 is formed in the blocking region S2 corresponding to the blocking portion 154 of the fourth mask 150 by exposing and developing the photoresist using the fourth mask 150. As the blue resin 158 is patterned by an etching process using the photoresist pattern 156, the blue color filter 112B and the blue color pattern 120B are formed as shown in FIG. 8C. Here, the blue color pattern 120B is formed in a well 144c shape having a space in which the fixed ball spacer 113 can be accommodated, and overlaps the red and green color patterns 120R and 120G. do.

9A to 9B are cross-sectional views illustrating a process of forming a common electrode and a fixed ball spacer of a color filter substrate of a liquid crystal display panel according to the present invention.

Referring to FIG. 9A, the common electrode 114 is formed by depositing a transparent conductive material on the upper substrate 111 on which the color filter 112 and the color pattern 120 are formed by a deposition method such as sputtering. The common electrode 114 may be made of a transparent conductive material including indium tin oxide, indium zinc oxide, or indium tin zinc oxide.

Subsequently, the inkjet 140 for forming the fixed ball spacer 113 on the upper substrate 111 on which the common electrode 114 is formed is aligned. The inkjet 140 directly forms the fixed ball spacer 113 in the well 144 provided by the color pattern 120 as shown in FIG. 9B.

The liquid crystal display panel according to an embodiment of the present invention and a method for manufacturing the same are compared to the "application number 10-2003-0046762" filed by the applicant of the present invention, the "application number 10-2003-0046762" Although the wells 144 of the color pattern 120 are sprayed using an inkjet, that is, the liquid spacers are sprayed to form the spacers, and then the spacers are completed through the firing process. Is formed directly on the well 144 of the color pattern 120 using an inkjet, so that no sintering process is required, so that the manufacturing process of the liquid crystal display panel can be simplified compared to the previously filed “Application No. 10-2003-0046762”. Can be. In addition, the liquid crystal display panel is compared with the liquid crystal spacers of the previously filed “Application No. 10-2003-0046762” formed by firing the liquid spacer by maintaining the cell gap of the liquid crystal display panel using the fixed ball spacer 113. The cell gap of can be made more uniform.

As described above, the liquid crystal display panel and the method of manufacturing the same according to the present invention form a fixed ball spacer in a well provided by a color pattern formed simultaneously with the color filter. Accordingly, the fixed ball spacer does not move the inside of the liquid crystal display panel due to the impact applied to the liquid crystal display panel from the outside during the process by the color pattern accommodating the fixed ball spacer. It is possible to prevent the light leakage and the aperture ratio of the liquid crystal display panel due to the movement.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (15)

A lower substrate; A black matrix facing the lower substrate and preventing light leakage and partitioning a cell region, a color filter formed in a cell region partitioned by the black matrix, and a well-shaped color pattern formed on the black matrix; An upper substrate having a branch; And a fixable ball spacer which maintains a gap between the upper substrate and the lower substrate and is accommodated in the well-shaped color pattern. The method of claim 1, The well-shaped color pattern, And at least one color pattern of a red color pattern, a green color pattern, and a blue color pattern formed on the black matrix. The method of claim 1, And the well-shaped color pattern is formed to be less than or equal to the width of the black matrix. The method of claim 2, And the well-shaped color pattern becomes narrower from the lower layer to the upper layer. According to claim 2, And the well-shaped color pattern has the same width of each layer. The method of claim 1, The fixed ball spacer is formed to be accommodated in the well-shaped color pattern using an inkjet. The method of claim 1, And the well-shaped color pattern is made of the same material as the color filter. The method of claim 1, And a common electrode formed on the color filter. Forming a black matrix which prevents light leakage and partitions the cell region; Forming an upper substrate by forming a color filter and a well-shaped color pattern on the black matrix in a cell region partitioned by the black matrix; Providing a lower substrate facing the upper substrate; Forming a fixed ball spacer accommodated in the well-shaped color pattern while maintaining a gap between the upper substrate and the lower substrate; And attaching the upper substrate and the lower substrate to each other. The method of claim 9, Forming the well-shaped color pattern, Stacking at least one color pattern of a red color pattern, a green color pattern, and a blue color pattern on the black matrix. The method of claim 9, The well-shaped color pattern is formed below the width of the black matrix. The method of claim 10, And the well-shaped color pattern becomes narrower from the lower layer to the upper layer. According to claim 10, The well-shaped color pattern is formed so that the width of each layer is the same. The method of claim 9, The fixing ball spacer may be formed to be accommodated in the well-shaped color pattern by using an inkjet. The method of claim 9, And forming a common electrode on the color filter.

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