KR20130024201A - Liquid crystal display device of mother substate and manufactucring metod of the same - Google Patents

Abstract

PURPOSE: A motherboard of an LCD panel and a manufacturing method thereof are provided to prevent stains by performing a spin coating for uniformly coating a color filer. CONSTITUTION: A motherboard(100) of an LCD panel includes unit liquid crystal display panels(130) and a dummy pattern(211). The dummy pattern is formed in the outer area of the unit liquid crystal display panel. The dummy pattern includes a first and a second horizontal portion(210,310). The first and second horizontal portions have tilt angles.

Description

A mother substrate of a liquid crystal display panel and a method of manufacturing the same {LIQUID CRYSTAL DISPLAY DEVICE OF MOTHER SUBSTATE AND MANUFACTUCRING METOD OF THE SAME}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mother substrate of a liquid crystal display panel and a method of manufacturing the same, and more particularly, to a mother substrate of a liquid crystal display panel and a method of manufacturing the same, which can prevent diagonal stains by uniformly applying a color filter during a spin coating process.

In general, a liquid crystal display (LCD) displays an image by allowing each of the liquid crystal cells arranged in a matrix form on a liquid crystal display panel to adjust light transmittance according to a video signal.

Such a liquid crystal display panel includes a thin film transistor substrate and a color filter substrate that are bonded by a binder with a liquid crystal interposed therebetween.

The color filter substrate includes a color filter array including a black matrix for preventing light leakage, a color filter for color implementation, a common electrode forming a vertical electric field with the pixel electrode, and an upper alignment layer coated thereon for liquid crystal alignment on the upper substrate. Is formed.

The thin film transistor substrate includes a gate line and a data line formed to cross each other on a lower substrate, a thin film transistor (TFT) formed at an intersection thereof, a pixel electrode connected to the thin film transistor, and a liquid crystal alignment thereon. A thin film transistor array including the applied lower alignment layer is formed on the lower substrate.

Conventionally, a manufacturing process for manufacturing a liquid crystal display panel is divided into an array forming process, a substrate bonding process, a substrate scribing process, and the like.

The array forming process is divided into an upper array forming process and a lower array forming process.

In the upper array forming process, a plurality of color filter arrays are formed on the upper mother substrate. In the lower array forming process, a plurality of thin film transistor arrays are formed on a lower mother substrate.

In this case, the upper array forming process forms a color filter of red, green, and blue on the entire surface of the upper mother substrate by using a spin coating method to form a color filter.

At this time, spin coating is a method of rotating a board | substrate after dropping a resin layer on a board | substrate, and spreading a resin layer to the whole surface of a mother substrate.

However, some problems occur in the process of forming the color filter substrate through the spin coating method. As the color layer is formed through the spin coating fixing of the resin layer in the state where the black matrix is formed on the mother substrate, the resin layer is formed. The black matrix is applied so as not to spread evenly on the upper mother substrate. As a result, oblique oblique lines and the like appear on the image when the liquid crystal display is driven.

Such slanted spots are frequently found at each corner of the screen on which the image is implemented, because the resin layer has to be spread to the front surface of the mother substrate through a spin coating process because it is disturbed by the black matrix.

The present invention has been made to solve the above problems, and to provide a mother substrate of a liquid crystal display panel and a method of manufacturing the same that can prevent diagonal stains by uniformly applying a color filter during the spin coating process.

To this end, the mother substrate of the liquid crystal display panel according to the present invention includes a plurality of unit liquid crystal display panels and dummy patterns including first and second horizontal portions formed to be inclined at a predetermined angle outside the display area of the unit liquid crystal display panel. Characterized in that.

Each of the plurality of unit liquid crystal display panels may include a thin film transistor array substrate including a thin film transistor on an upper mother substrate, a thin film transistor array including a pixel electrode connected to the thin film transistor, a black matrix on a lower mother substrate, And a color filter array substrate on which color filter arrays comprising R, G, and B color filters and pixel electrodes are formed.

The dummy pattern may have an “L” shape or an “inverse L” shape having a first horizontal portion formed parallel to the first direction and a second horizontal portion perpendicular to the first horizontal portion and parallel to the second horizontal portion. It is characterized by being formed.

In addition, the dummy pattern is characterized in that only the first horizontal portion of the "-" shape parallel to the first direction is formed, or only the second horizontal portion of the "l" shape parallel to the second direction is formed.

The dummy pattern may be formed in a cross shape having a first horizontal portion parallel to a first direction and a second horizontal portion in a second direction formed to intersect the first horizontal portion.

In addition, the first and the second horizontal portion is characterized in that each of which is formed to be inclined at an angle in the range of 20 ~ 75 °.

The present invention provides a method of manufacturing a mother substrate of a liquid crystal display panel including a plurality of unit liquid crystal display panels and a dummy pattern formed outside the display area of the unit liquid crystal display panel, the black matrix being formed at a predetermined angle on the mother substrate. Forming a dummy pattern having first and second horizontal portions formed obliquely, and coating and patterning R, G, and B resin layers on the mother substrate on which the black matrix and the dummy pattern are formed by spin coating; And forming a B color filter, and forming a common electrode on the color filter.

Here, the forming of the dummy pattern having the black matrix and the first and second spherical portions formed to be inclined at a predetermined angle on the mother substrate may include a blocking region having a blocking layer formed on the substrate and a first transflective layer having a first transmittance. It is formed using a halftone mask having a layered first transflective region, a second transflective region having a second transflective layer having a transmittance higher than the first transmittance, and a transmissive region in which only a substrate exists. Forming dummy patterns having first and second horizontal portions having inclined surfaces through the first and second transflective regions.

In addition, each of the first and second horizontal parts is formed to be inclined at an angle of 20 ~ 75 °.

The mother substrate of the liquid crystal display panel according to the present invention includes a plurality of unit liquid crystal display panels and a dummy pattern including a first horizontal portion and a second horizontal portion formed in a step shape on the outside of the display area of the unit liquid crystal display panel. It is done.

Each of the plurality of unit liquid crystal display panels may include a thin film transistor array substrate including a thin film transistor on an upper mother substrate, a thin film transistor array including a pixel electrode connected to the thin film transistor, a black matrix on a lower mother substrate, And a color filter array substrate on which color filter arrays comprising R, G, and B color filters and pixel electrodes are formed.

In addition, each of the first and second horizontal parts may include a first stepped part formed at the same height as the black matrix, and a second stepped part lower than the first stepped part.

The block pattern may further include a block pattern parallel to the second stepped portion of the dummy pattern.

In addition, the dummy pattern may have an "L" shape or an "inverted L" shape having a first horizontal portion formed parallel to the first direction and a second horizontal portion perpendicular to the first horizontal portion and parallel to the second direction. It is characterized by forming.

The dummy pattern may form only a first horizontal portion having a "-" shape parallel to the first direction or a second horizontal portion having a "l" shape parallel to the second direction.

In addition, the dummy pattern may be formed in a cross shape having a first horizontal portion parallel to a first direction and a second horizontal portion in a second direction formed to intersect the first horizontal portion.

The present invention provides a method of manufacturing a mother substrate of a liquid crystal display panel including a plurality of unit liquid crystal display panels and a dummy pattern formed outside the display area of the unit liquid crystal display panel. Forming a dummy pattern having first and second horizontal portions, and coating and patterning R, G, and B resin layers on the mother substrate on which the black matrix and the dummy pattern are formed by spin coating; Forming a color filter, and forming a common electrode on the color filter.

Here, the forming of the dummy pattern having the black matrix and the first and second horizontal portions formed in the step shape on the mother substrate may include a blocking region in which a blocking layer is formed on the substrate, a semi-transmissive region having a semi-transmissive layer, and a substrate. A halftone mask is formed using a halftone mask having a transmissive region. Only a first step portion having the same height as the black matrix is formed through the blocking region, and a height lower than the first step portion through the semi-transmissive region. And forming a dummy pattern having the first and second horizontal portions on which the second stepped portions are formed.

The present invention forms a dummy pattern including first and second horizontal parts formed to be inclined at a predetermined angle outside the display area of the unit liquid crystal display panel. The inclined surfaces of each of the first horizontal portion and the second horizontal portion compensate for the height of the black matrix so that color filters are evenly applied to prevent diagonal stains.

In addition, the present invention forms a dummy pattern including first and second horizontal portions formed in a step shape on the outside of the display area of the unit liquid crystal display panel. Each of the first horizontal portion and the second horizontal portion includes a first stepped portion having the same height as that of the black matrix, and a second stepped portion lower than the first stepped portion. The first and second stepped portions compensate for the height of the black matrix, and color filters may be evenly applied to prevent diagonal staining.

1 is a plan view and a cross-sectional view of a mother substrate of a liquid crystal display panel according to a first exemplary embodiment of the present invention.
2A and 2B are plan views illustrating various patterns and arrangements of the dummy pattern illustrated in FIG. 1.
3 is a flowchart illustrating a manufacturing process for manufacturing a liquid crystal display panel according to a first embodiment of the present invention.
4A to 4C are cross-sectional views illustrating a process of forming a color filter array substrate according to a first embodiment of the present invention.
FIG. 5 is a cross-sectional view illustrating a halftone mask of a process of forming the black matrix and the dummy pattern illustrated in FIG. 4A.
6A to 6C are perspective views illustrating the color filter forming process illustrated in FIG. 4B.
7 and 9 are plan views and cross-sectional views illustrating a mother substrate of a liquid crystal display panel according to a second exemplary embodiment of the present invention.
FIG. 8 is a cross-sectional view for describing the dummy pattern illustrated in FIG. 7.
FIG. 10 is a cross-sectional view for describing the dummy pattern illustrated in FIG. 9.
FIG. 11 is a cross-sectional view illustrating a halftone mask for forming the dummy pattern illustrated in FIG. 7.
FIG. 12 is a cross-sectional view illustrating a halftone mask for forming the dummy pattern illustrated in FIG. 9.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. The configuration of the present invention and the operation and effect thereof will be clearly understood through the following detailed description. Before describing the present invention in detail, the same components are denoted by the same reference symbols as possible even if they are displayed on different drawings. In the case where it is judged that the gist of the present invention may be blurred to a known configuration, do.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 9.

1 is a plan view and a cross-sectional view of a mother substrate of a liquid crystal display panel according to a first exemplary embodiment of the present invention.

As illustrated in FIG. 1, the mother substrate 100 of the liquid crystal display panel according to the exemplary embodiment may include a plurality of unit liquid crystal display panels 130 and a display area AA of the unit liquid crystal display panel 130. It includes at least one dummy pattern 211 formed on the outside.

The mother substrate 100 of the liquid crystal display panel is formed of a plurality of unit liquid crystal display panels 130 having a predetermined size before being cut into each liquid crystal display panel.

Each of the plurality of unit liquid crystal display panels 130 includes a thin film transistor array substrate and a color filter array substrate facing the thin film transistor array substrate and bonded by the sealant 132, and a display area inside the sealant displaying an image. And a non-display area outside the sealant.

The thin film transistor array substrate includes a thin film transistor connected to a gate line and a data line, respectively, on the lower mother substrate 101, and a pixel electrode 122 formed in a pixel region having a cross structure.

The thin film transistor keeps the pixel signal supplied to the data line charged in the pixel electrode 122 in response to the scan signal supplied to the gate line. To this end, the thin film transistor includes a gate electrode 106, a source electrode 108, a drain electrode 110, an active layer 114, and an ohmic contact layer 116.

The gate electrode 106 is connected with the gate line so that a scan signal from the gate line is supplied. The source electrode 108 is connected with the data line so that the pixel signal from the data line is supplied. The drain electrode 110 is formed to face the source electrode 108 with the channel portion of the active layer 114 interposed therebetween to supply the pixel signal from the data line 104 to the pixel electrode 122. The active layer 114 overlaps the gate electrode 106 with the gate insulating layer 112 therebetween to form a channel portion between the source and drain electrodes 108 and 110. The ohmic contact layer 116 is formed between the source electrode 108 and the drain electrode 110 and the active layer 114, that is, on the active layer 114 except for the channel portion. The ohmic contact layer 116 serves to reduce electrical contact resistance between each of the source and drain electrodes 108 and 110 and the active layer 114.

The pixel electrode 122 is connected to the drain electrode 110 of the thin film transistor through the pixel contact hole 120. Accordingly, the pixel electrode 122 is supplied with the pixel signal from the data line through the thin film transistor.

The color filter array substrate includes a black matrix 204, a color filter 202, a common electrode 206, and a dummy pattern 210 sequentially formed on the upper mother substrate 200.

The color filter 202 includes red, green, and blue color filters to implement color. The color filter 202 is formed to be divided into red (R), green (G), and blue (B) in the pixel area divided by the black matrix 204 to transmit red, green, and blue light, respectively.

The black matrix 204 divides the pixel region in which the color filter 202 is to be formed on the upper mother substrate 200. The black matrix 204 blocks the transmitted light generated by the undesired liquid crystal array to improve the contrast of the display device and prevents light leakage current of each thin film transistor by blocking direct light irradiation to the thin film transistor.

The common electrode 206 supplies a common voltage as a reference when driving the liquid crystal to the transparent conductive layer. To this end, the common electrode 206 is formed of a material such as indium tin oxide (ITO) or indim zinc oxide (IZO) that is transparent and conductive.

The dummy pattern 211 is formed outside the display area AA of the unit liquid crystal display panel 130, and is inclined at a predetermined angle so that the color filter 202 can be evenly spread evenly when the color filter 202 is applied. The first and second horizontal portions 210 and 310 are formed. The inclined surfaces of each of the first horizontal portion 210 and the second horizontal portion 310 compensate for the height of the black matrix 204 so that the color filter 202 is evenly applied. In other words, since the color resin layer proceeds on the inclined surface during the spin coating process, the color resin layer can spread evenly over the entire surface. The range of predetermined angle (theta) is 20-75 degrees, Preferably it is 30-40 degrees.

In detail, as illustrated in FIG. 1, the dummy pattern 211 may be formed of a first horizontal portion 210 parallel to the first direction, perpendicular to the first horizontal portion 210, and parallel to the second direction. It may be formed in an "L" shape or a "reverse L" shape having two horizontal portions 310. Alternatively, the dummy pattern may include only a first horizontal portion having a “−” shape parallel to the first direction, or a second horizontal portion 252 having a “l” shape parallel to the second direction as shown in FIG. 2A. Only can be formed. Alternatively, the dummy pattern 250 may be formed in a cross shape having a first horizontal part parallel to the first direction and a second horizontal part in a second direction formed to intersect the first horizontal part as shown in FIG. 2B. have.

As illustrated in FIGS. 1 and 2B, two dummy patterns 211 may be formed facing each other at a corner portion of the display area AA of the unit liquid crystal display panel 130, or a display of the unit liquid crystal display panel 130 may be performed. Four may be formed at each corner of the region AA. Alternatively, the closer the position where the color resin layer is to be dispensed, the higher the density of the dummy pattern, and the farther away from the dispensing position, the smaller the density of the dummy pattern may be.

3 is a flowchart illustrating a manufacturing process for manufacturing a liquid crystal display panel according to a first embodiment of the present invention.

Referring to FIG. 3, a manufacturing process for manufacturing a liquid crystal display panel according to a first exemplary embodiment of the present invention may include an array forming process (step S1), a bonding process (step S2), a scribing process (step S3), and a liquid crystal display. It includes a cell inspection process (step S4) and a module inspection process (step S5).

The array forming step (step S1) is divided into a color filter array substrate forming step and a thin film transistor array substrate forming step.

In the color filter array substrate forming process, a plurality of color filter arrays are formed per unit cell on the upper mother substrate 200. Here, each of the plurality of color filter arrays includes a black matrix 204 for preventing light leakage, a dummy pattern 211 formed of the same material as the black matrix 204 on the outside of the display area AA, and a color for implementing colors. The filter 202 includes a common electrode 206 forming a vertical electric field with the pixel electrode 122, and an upper alignment layer (not shown) coated thereon for liquid crystal alignment. A process of the color filter array substrate forming process will be described with reference to FIGS. 4A to 6C.

In the thin film transistor substrate forming process, a plurality of thin film transistor arrays are formed per unit cell on the lower mother substrate 101. Here, each of the plurality of thin film transistor arrays includes a gate line and a data line formed to cross each other, a thin film transistor formed at an intersection thereof, a pixel electrode 122 connected to the thin film transistor, and a lower portion coated thereon for liquid crystal alignment. An alignment film (not shown).

In the substrate bonding process (step S2), the upper mother substrate 200 and the lower mother substrate 101 are bonded together using the sealant 132. See FIG. 1.

In the bonding process, each of the plurality of color filter arrays formed on the upper mother substrate 200 and the plurality of thin film transistor arrays are bonded to face each other to provide a plurality of unit liquid crystal display panels 130. Meanwhile, the liquid crystal layer to be positioned between the color filter array and the thin film transistor array is formed through an injection process or a dropping process.

In the injection process, after the bonding process, the liquid crystal is injected into the liquid crystal injection hole, and then the liquid crystal injection hole is sealed to form a liquid crystal layer between the upper mother substrate and the lower mother substrate. The dropping process forms a liquid crystal layer by dropping a liquid crystal into a liquid crystal space provided by a sealant on an upper mother substrate or a lower mother substrate, and then attaches the upper mother substrate 200 and the lower mother substrate 101 to each other.

The substrate scribing process (step S3) separates each of the plurality of unit liquid crystal display panels using a diamond wheel along the scribing line. The non-uniform side surface of the cut portion of the display panel separated by the scribing process may be uniformized by a polishing process using a grinding apparatus. At this time, the dummy pattern is also separated along the scribing line.

The liquid crystal cell inspection process (step S4) is attached to each of the separated liquid crystal display panels to determine whether the panel is defective or not, and the module inspection process (step S5) is used to inspect the display panel determined as good in the liquid crystal cell process. After installing the drive unit, determine whether there is any defect.

A process of forming a color filter array substrate according to a first embodiment of the present invention will be described with reference to FIGS. 4A to 4C.

Referring to FIG. 4A, a dummy pattern 211 including first and second horizontal portions inclined at a predetermined angle is formed in the black matrix 204 and the outer region of the unit liquid crystal display panel.

Specifically, a black resin layer having photosensitivity is applied on the upper mother substrate 200 through a spin coating method. The black resin layer is coated on the upper mother substrate 200, and then exposed and developed using a slit mask or a halftone mask to form a black matrix 204 and first and second horizontal portions inclined at a predetermined angle ( Dummy patterns 211 including 210 and 310 are formed.

As illustrated in FIG. 5, the halftone mask includes a blocking region S1 having a blocking layer 172 formed thereon and a first semi-transmissive layer having a first transmissive layer 174 having a first transmittance. A region S2, a second transflective region S3 on which a second transflective layer 176 having a transmittance higher than the first transmittance is formed, and a transmissive region S4 in which only the substrate 170 is present are provided. As such, the halftone mask 170 may be used, and although not illustrated, a slit mask may be used. The blocking region S1 is positioned in a region where the black matrix 204 and the dummy pattern 211 are to be formed to block ultraviolet rays, so that the black resin layer remains after development as shown in FIG. 5. The first semi-transmissive region S2 and the second semi-transmissive region S3 are formed to be inclined at a predetermined angle by having transflective layers 174 and 176 having different transmittances, and the predetermined angle is 20 to 75. ° range. In addition, the black resin layer is removed as shown in FIG. 5 after the development by transmitting all ultraviolet rays in the transmission region S4.

As such, the black resin layer is exposed and developed to simultaneously form the dummy pattern 211 having the black matrix 204 and the first and second horizontal portions 210 and 310 inclined at a predetermined angle.

Meanwhile, the dummy pattern 211 may be formed in an “L” shape or an “inverse L” shape in which the first horizontal portion 210 and the second horizontal portion 310 are perpendicular to each other, as shown in FIG. Only the first horizontal portion of the parallel "-" shape is formed, or only the second horizontal portion 252 of the "l" shape parallel to the second direction is formed as shown in Figure 2a, or the first horizontal portion as shown in Figure 2b And the second horizontal portion may be formed in a cross shape 250 to cross each other.

Referring to FIG. 4B, a color filter 202 is formed on the upper mother substrate 200 on which the black matrix 204 and the dummy pattern 211 are formed.

Specifically, a red resin layer is formed on the upper mother substrate 200 on which the black matrix 204 and the dummy pattern 211 are formed by a spin coating method. The red resin layer is patterned by a photolithography process to form a red (R) color filter in the pixel region. Then, a green (G) resin layer is formed on the upper mother substrate on which the red (R) color filter is formed. This green resin layer is formed by a photolithography process in which a blue (G) color filter is formed. Thereafter, a blue resin layer is formed on the upper mother substrate on which the green (G) color filter is formed. The blue resin layer is patterned by a photolithography process to form a blue color filter in the pixel region.

In this case, as shown in FIGS. 6A to 6C, spin coating is performed through a spin coater. The spin coater includes a chuck 430 for supporting the substrate 200 and a number of red, green, and blue colors on the substrate 200. It consists of a nozzle 420 and a nozzle bar 410 for dispensing the ground layer.

As shown in FIG. 6A, one of the red, green, and blue resin layers (hereinafter, R, G, and B resin layers) is positioned on the upper mother substrate 200 through the nozzle 420. Dispensing in the area. When the resin layer is dispensed on the upper mother substrate 200, as shown in FIG. 6B, the chuck 430 rotates to spin coat the resin layer over the entire area of the upper mother substrate 200. When each of the R, G, and B resin layers are rotated by the chuck 430, each resin layer may be uniformly coated on the entire surface by advancing along the inclined surface of the dummy pattern 211 as shown in FIG. 6C. That is, when the respective R, G, B resin layers are applied, the R, G, B resin layers are applied with a thickness that is not uniform and the resin layers are not evenly applied by the height of the black matrix 204. However, since the R, G, and B resin layers proceed along the slope of the dummy pattern 211, the height of the black matrix 204 is compensated.

Referring to FIG. 4C, a common electrode 206 is formed on the mother substrate 200 on which the color filter 202 is formed.

Specifically, the common electrode 206 is formed by depositing a transparent conductive layer such as ITO or IZO by sputtering using a method such as PECVD (Plasma Enhanced Chemical Vapor Deposition).

7 and 9 are plan views and cross-sectional views illustrating a mother substrate of a liquid crystal display panel according to a second exemplary embodiment of the present invention.

As illustrated in FIG. 7, the mother substrate 100 of the liquid crystal display panel according to the second embodiment of the present invention includes a plurality of unit liquid crystal display panels 130 and a display area AA of the unit liquid crystal display panel 130. At least one dummy pattern 231 is formed on the outer periphery.

Since the mother substrate of the liquid crystal display panel according to the second exemplary embodiment of the present invention has the same components as those of the first exemplary embodiment of the present invention except for the dummy pattern, the description of the other components except for the dummy pattern will be omitted. .

The dummy pattern 213 is formed at an outer side of the display area AA of the unit liquid crystal display panel 130, and includes first and second horizontal portions formed in a step shape so that the color filter can be spread evenly when the color filter is applied. 212,312).

In detail, each of the first and second horizontal portions 212 and 312 may have a height greater than that of the first stepped portion 212b and the first stepped portion 212b as shown in FIG. 7. The second stepped portion 212a having a low height is included. This is because the dummy patterns 212,312 and 213 having the first and second stepped portions 212a and 212b compensate the height of the black matrix 204 as shown in FIG. 8 to evenly apply the color filter 204. For sake.

In addition, as shown in FIG. 9, one more block pattern 216 may be formed in a direction parallel to the dummy pattern 215. The block pattern 216 is formed to have the same height as or lower than the second stepped portion 214a of the dummy pattern 210. In the spin coating process, as shown in FIG. 10, the R, G, and B resin layers pass through the block pattern 216 and ride on the first and second stepped portions 212a and 212b of the dummy pattern 213. This can spread well across the board.

As illustrated in FIG. 7, the dummy pattern 213 is perpendicular to the first horizontal part 212 and the first horizontal part 212 and parallel to the second direction as shown in FIG. 7. It may be formed in an "L" shape or a "reverse L" shape having a horizontal portion 312. Alternatively, the dummy pattern may include only a first horizontal portion having a “−” shape parallel to the first direction, or a second horizontal portion 252 having a “l” shape parallel to the second direction as shown in FIG. 2A. Only can be formed. Alternatively, the dummy pattern 250 may be formed in a cross shape having a first horizontal part parallel to the first direction and a second horizontal part in a second direction formed to intersect the first horizontal part as shown in FIG. 2B. have.

As illustrated in FIGS. 7, 2A, and 2B, two dummy patterns 211 may be formed to face each other at edge portions of the display area AA of the unit liquid crystal display panel 130, or the unit liquid crystal display panel 130 may be formed. Four may be formed at each corner of the display area AA of FIG. Alternatively, the closer the position where the color resin layer is to be dispensed, the higher the density of the dummy pattern, and the farther away from the dispensing position, the smaller the density of the dummy pattern may be.

In the manufacturing process for manufacturing the liquid crystal display panel according to the second embodiment of the present invention, an array forming process (step S1) divided into a color filter array substrate forming process and a thin film transistor array substrate forming process, and a bonding process of bonding two substrates together (Step S2), a scribing step (step S3), a liquid crystal cell inspection step (step S4), and a module inspection step (step S5) which are separated into unit liquid crystal display panels.

The manufacturing process for manufacturing the liquid crystal display panel according to the second embodiment of the present invention is the same as the manufacturing process for manufacturing the liquid crystal display panel according to the first embodiment of the present invention except for the process of forming a color filter array substrate. Except the filter array substrate forming process will be omitted.

The color filter array substrate forming process according to the second embodiment of the present invention will be described. The color filter array process includes a black matrix and dummy pattern forming process, a color filter forming process, and a common electrode forming process, except for the double black matrix and dummy pattern forming process, the remaining manufacturing process is performed in the first embodiment of the present invention. Since the same process as the color filter array substrate forming process according to the above will be omitted.

Referring to FIG. 11, dummy patterns including the black matrix 204 and the first and second horizontal parts 212 and 312 formed in a step shape in the outer region of the unit liquid crystal display panel are formed.

Specifically, a black resin layer having photosensitivity is applied on the upper mother substrate 200 through a spin coating method. A black resin layer is coated on the upper mother substrate 200, and then exposed and developed by using a slit mask or a halftone mask to include a black matrix 204 and a dummy including the first and second horizontal portions 212 and 312. Form a pattern.

As shown in FIG. 11, the halftone mask includes a blocking region S1 in which a blocking layer 172 is formed on a substrate 170, and a semi-transmissive region S5 in which a transflective layer 178 is formed on a substrate 170. ) And a transmission region S4 in which only the substrate 170 exists. The blocking region S1 is positioned at a region where the black matrix 204 and the first stepped portions 214b of the dummy patterns 214 and 314 are to be formed to block ultraviolet rays, and thus the black matrix 204 as shown in FIG. 11 after development. ) And the first stepped portion 214b having the same height as the black matrix 204 is formed. The semi-transmissive region S4 is located in the region where the second stepped portions 214a of the dummy patterns 214 and 314 are to be formed, and then adjusts the light transmittance so as to be lower than the first stepped portion 212b as shown in FIG. 11 after development. The second stepped portion 212a is formed. The black resin layer is removed as shown in FIG. 11 after development by transmitting all ultraviolet rays in the transmission region S1.

As described above, the black resin layer is exposed and developed to simultaneously form dummy patterns 214 and 314 having first and second stepped portions 212a and 212b having different heights from the black matrix 204.

As shown in FIG. 9, the black matrix 204, the dummy patterns 214 and 314, and the block patterns 216 are formed using a halftone mask as shown in FIG. 12. The blocking region S1 is positioned at a region where the black matrix 204 and the first stepped portions 212b of the dummy patterns 214 and 314 are to be formed to block ultraviolet rays, and thus the black matrix 204 as illustrated in FIG. 12. ) And the first stepped portion 214b having the same height as the black matrix 204 is formed. The transflective area S4 is located in the area where the block pattern 216 and the second stepped portions 214a of the dummy patterns 214 and 314 are to be formed, and then adjusts the light transmittance to develop the first light as shown in FIG. 11. The second step 212a lower than the step 212b is formed. The black resin layer is removed as shown in FIG. 11 after development by transmitting all ultraviolet rays in the transmission region S1.

The foregoing description is merely illustrative of the present invention, and various modifications may be made by those skilled in the art without departing from the spirit of the present invention. Accordingly, the embodiments disclosed in the specification of the present invention are not intended to limit the present invention. The scope of the present invention should be construed according to the following claims, and all the techniques within the scope of equivalents should be construed as being included in the scope of the present invention.

101: lower mother substrate 200: upper mother substrate
211, 213, 215: dummy pattern 216: block pattern
210, 212, 214: first horizontal portion 310, 312, 314: second horizontal portion
214a: second stepped portion 214b: first stepped portion

Claims (18)

A plurality of unit liquid crystal display panels;
And a dummy pattern including first and second horizontal parts formed to be inclined at a predetermined angle outside the display area of the unit liquid crystal display panel. The method of claim 1,
Each of the plurality of unit liquid crystal display panels
A thin film transistor array substrate having a thin film transistor array including a thin film transistor and a pixel electrode connected to the thin film transistor on an upper mother substrate;
A mother substrate of a liquid crystal display panel comprising a color filter array substrate having a color filter array including a black matrix, R, G, B color filters, and pixel electrodes on a lower mother substrate. The method of claim 1,
The dummy pattern is formed in an "L" shape or an "inverted L" shape having a first horizontal portion formed in parallel with the first direction, a second horizontal portion perpendicular to the first horizontal portion, and parallel to the second horizontal portion. A mother substrate of a liquid crystal display panel, characterized in that. The method of claim 1,
The dummy pattern may include only a first horizontal portion having a "-" shape parallel to the first direction or a second horizontal portion having a "l" shape parallel to the second direction. Mosquito board. The method of claim 1,
The dummy pattern is formed in a cross shape having a first horizontal portion parallel to the first direction and a second horizontal portion in a second direction formed to intersect the first horizontal portion. The method according to any one of claims 3 to 4,
Each of the first and second horizontal parts is formed to be inclined at an angle in a range of 20 to 75 °. In the manufacturing method of the mother substrate of the liquid crystal display panel containing many unit liquid crystal display panels and the dummy pattern formed in the outer periphery of the display area of the said unit liquid crystal display panel,
Forming a dummy pattern on the mother substrate, the dummy pattern having a black matrix and first and second horizontal portions formed to be inclined at a predetermined angle;
Forming an R, G, B color filter by coating and patterning an R, G, B resin layer on the mother substrate on which the black matrix and the dummy pattern are formed by spin coating;
And forming a common electrode on the color filter. The method of claim 7, wherein
Forming a dummy pattern on the mother substrate having a black matrix and the first and second spherical portions inclined at a predetermined angle may be
A blocking region in which a blocking layer is formed on the substrate, a first transflective region in which a first transflective layer having a first transmittance is formed, and a second transflective region in which a second transflective layer having a transmittance higher than the first transmittance is formed. And a halftone mask having a transmissive region where only the substrate is present,
And forming dummy patterns having first and second horizontal portions having inclined surfaces through the first and second transflective regions. 9. The method of claim 8,
And the first and second horizontal portions are inclined at an angle of 20 to 75 degrees. A plurality of unit liquid crystal display panels;
And a dummy pattern including a first horizontal part and a second horizontal part formed in a staircase shape on the outside of the display area of the unit liquid crystal display panel. The method of claim 10,
Each of the plurality of unit liquid crystal display panels
A thin film transistor array substrate having a thin film transistor array including a thin film transistor and a pixel electrode connected to the thin film transistor on an upper mother substrate;
A mother substrate of a liquid crystal display panel comprising a color filter array substrate having a color filter array including a black matrix, R, G, B color filters, and pixel electrodes on a lower mother substrate. The method of claim 11,
Each of the first and second horizontal portions
A first step portion formed at the same height as the black matrix;
And a second step portion having a height lower than that of the first step portion. The method of claim 12,
The mother substrate of the liquid crystal display panel further comprising a block pattern parallel to the second stepped portion of the dummy pattern. The method of claim 12,
The dummy pattern may be formed in an “L” shape or an “inverse L” shape having a first horizontal portion formed parallel to the first direction and a second horizontal portion perpendicular to the first horizontal portion and parallel to the second horizontal portion. A mother substrate of a liquid crystal display panel, characterized in that. The method of claim 12,
The dummy pattern may form only a first horizontal portion having a "-" shape parallel to the first direction or a second horizontal portion having a "l" shape parallel to the second direction. Mosquito board. The method of claim 12,
And the dummy pattern is formed in a cross shape having a first horizontal portion parallel to a first direction and a second horizontal portion in a second direction formed to intersect the first horizontal portion. In the manufacturing method of the mother substrate of the liquid crystal display panel containing many unit liquid crystal display panels and the dummy pattern formed in the outer periphery of the display area of the said unit liquid crystal display panel,
Forming a dummy pattern having a black matrix and first and second horizontal portions formed in a step shape on the mother substrate;
Forming an R, G, B color filter by coating and patterning an R, G, B resin layer on the mother substrate on which the black matrix and the dummy pattern are formed by spin coating;
And forming a common electrode on the color filter. 18. The method of claim 17,
Forming a dummy pattern having a black matrix and first and second horizontal portions formed on the mother substrate in a step shape
It is formed using a halftone mask having a blocking region formed with a blocking layer on the substrate, a semi-transmissive region having a transflective layer, and a transmissive region in which only the substrate is present.
A dummy pattern having a first stepped portion having the same height as the black matrix through the blocking region, and having the first and second horizontal portions formed with a second stepped portion having a lower height than the first stepped portion through the semi-transmissive region; Forming a mother substrate of the liquid crystal display panel.

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