KR101003611B1 - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a method of manufacturing a liquid crystal display device by a liquid crystal dropping method capable of preventing a gravity failure, comprising the steps of: preparing a first substrate having a plurality of first panels; Preparing a second substrate on which a plurality of second panels are formed; Defining an active region and a dummy region on an outer side of the panel, and forming a seal pattern having a protrusion extending at one side thereof to the dummy region; Dropping a liquid crystal having a reference value or more into the active region; Bonding the first and second substrates to each other by the seal pattern; Cutting the first and second substrates to separate a plurality of liquid crystal panels to which the first panel and the second panel are joined, while cutting a part of the protrusion of the seal pattern to leave a part of the seal pattern formed on the protrusion; And when the amount of liquid crystal exceeds the set reference value, pressurizing the liquid crystal panel to rupture the seal pattern remaining in the protrusion of the seal pattern to form an opening, and then removing excess liquid crystal inside the liquid crystal panel through the opening. It provides a method of manufacturing a liquid crystal display device comprising. As described above, the present invention forms a protrusion on the seal pattern and removes the liquid crystal overfilled in the liquid crystal panel through the protrusion, thereby preventing deterioration in image quality due to unfilled or overfilled liquid crystal.

Description

Manufacturing method of liquid crystal display device {LIQUID CRYSTAL DISPLAY DEVICE}

1 is a cross-sectional view of a general liquid crystal display device.

2 is a flowchart showing a conventional method for manufacturing a liquid crystal display device.

3 is a view showing liquid crystal injection of a conventional liquid crystal display device.

4 is a view showing a liquid crystal display device manufactured by the liquid crystal dropping method.

5 is a flowchart illustrating a method of manufacturing a liquid crystal display device of the present invention.

6 is a plan view schematically showing a thin film transistor array substrate and a color filter substrate defined by a panel region and a dummy region.

7A is a view showing a step of dropping liquid crystal on a color filter substrate.

7B is a view illustrating a process of forming a seal pattern on a thin film transistor array substrate.

8 is a cross-sectional view illustrating a bonding process of a thin film transistor array substrate and a color filter substrate formed by FIGS. 7A and 7B.

9A and 9B illustrate a process of separating a plurality of liquid crystal panels and a pressurization process, FIG. 9A is a plan view, and FIG. 9B is a sectional view.

10A and 10B show a sealing process, FIG. 10A is a plan view, and FIG. 10B is a sectional view.

FIG. 11 is a view illustrating another example of a seal pattern protrusion of a liquid crystal display device before a cutting process and a unit panel after the cutting process.

*** Explanation of symbols for main parts of drawing ***

200a: color filter substrate 200b: thin film transistor array substrate

210a, 210b: liquid crystal panel 220: liquid crystal dropping device

230: dummy area 250: liquid crystal layer

300: seal pattern 350: seal pattern protrusion

370: opening 400: sealing material

300 ': Seal pattern formed on the projecting part after cutting process

The present invention relates to a liquid crystal display device using a dropping method, and more particularly, to a method of manufacturing a liquid crystal display device that can further improve the image quality by preventing the gravity failure of the liquid crystal.

Recently, with the development of various portable electronic devices such as mobile phones, PDAs, and notebook computers, there is a growing demand for flat panel display devices for light and thin applications. Such flat panel displays are being actively researched, such as LCD (Liquid Crystal Display), PDP (Plasma Display Panel), FED (Field Emission Display), VFD (Vacuum Fluorescent Display), but mass production technology, ease of driving means, Liquid crystal display devices (LCDs) are in the spotlight for their implementation.

1 schematically illustrates a cross section of a general liquid crystal display device. As shown in the figure, the liquid crystal display device 1 is composed of a lower substrate 5 and an upper substrate 3 and a liquid crystal layer 7 formed between the lower substrate 5 and the upper substrate 3. . Although the lower substrate 5 is a driving element array substrate, although not shown in the drawing, a plurality of pixels are formed on the lower substrate 5, and each pixel is driven such as a thin film transistor. An element is formed. The upper substrate 3 is a color filter substrate, and a color filter layer for real color is formed. In addition, a pixel electrode and a common electrode are formed on the lower substrate 5 and the upper substrate 3, respectively, and an alignment film for aligning liquid crystal molecules of the liquid crystal layer 7 is coated.

The lower substrate 5 and the upper substrate 3 are bonded by a sealing material 9, and a liquid crystal layer 7 is formed therebetween, and is driven by a driving element formed on the lower substrate 5. Information is displayed by controlling the amount of light passing through the liquid crystal layer by driving the liquid crystal molecules.

The manufacturing process of the liquid crystal display device can be largely divided into a driving element array substrate process of forming a driving element on the lower substrate 5, a color filter substrate process of forming a color filter on the upper substrate 3, and a cell process. However, the process of the liquid crystal display will be described with reference to FIG. 2.

First, a plurality of gate lines and data lines arranged on the lower substrate 5 to define a pixel region are formed by a driving element array process, and the gate line and data are formed in each of the pixel regions. A thin film transistor which is a driving element connected to the line is formed (S101). In addition, the pixel electrode is connected to the thin film transistor through the driving element array process to drive the liquid crystal layer as a signal is applied through the thin film transistor.

In addition, the upper substrate 3 is formed with a color filter layer and a common electrode of R, G, B to implement the color by the color filter process (S104).

Subsequently, an alignment layer is applied to the upper substrate 3 and the lower substrate 5, respectively, and then the alignment control force or surface fixing force (ie, the liquid crystal molecules of the liquid crystal layer formed between the upper substrate 3 and the lower substrate 5). In order to provide a pretilt angle and an orientation direction, the alignment layer is rubbed (S102 and S105). Subsequently, a spacer is disposed on the lower substrate 5 to maintain a constant cell gap, and a sealing material is applied to an outer portion of the upper substrate 3. Then, the lower substrate 5 and the upper substrate are dispersed. Pressure is applied to (3), and it adheres (S103, S106, S107).

On the other hand, the lower substrate 5 and the upper substrate 3 is made of a large area glass substrate. In other words, a plurality of panel regions are formed on a large area glass substrate, and a TFT and a color filter layer, which are driving elements, are formed in each of the panel regions. Must be processed (S108). Thereafter, liquid crystal is injected into the liquid crystal panel processed as described above through the liquid crystal inlet, and the liquid crystal inlet is encapsulated to form a liquid crystal layer, and then the liquid crystal display is manufactured by inspecting each liquid crystal panel (S109 and S110). .

At this time, the liquid crystal injection is performed by the following process. That is, as shown in FIG. 3, nitrogen (N ₂ ) gas is supplied into the vacuum chamber 10 in a state where the injection port 16 of the liquid crystal panel 1 is in contact with the liquid crystal 14 to provide the chamber 10. When the degree of vacuum is lowered, the liquid crystal 14 is injected into the panel 1 through the injection hole 16 by the pressure difference between the pressure inside the liquid crystal panel 1 and the vacuum chamber 10, and the liquid crystal is introduced into the panel 1. The liquid crystal layer is formed by encapsulating the injection hole 16 with a sealing material after it is completely filled in (). This method is called vacuum injection of liquid crystal).

However, since the liquid crystal is injected through the injection hole 16 of the liquid crystal panel 1 in the vacuum chamber 10 as described above, the liquid crystal injection time takes a long time. That is, since the distance between the drive element array substrate and the color filter substrate of the liquid crystal panel is very narrow, such as several micrometers, only a very small amount of liquid crystal per unit time is injected into the liquid crystal panel. For example, when manufacturing a liquid crystal panel of about 15 inches takes about 8 hours to completely inject the liquid crystal, the liquid crystal panel manufacturing process is lengthened by the long-term liquid crystal injection has a problem that the manufacturing efficiency is reduced. . In particular, the vacuum injection method as described above is not suitable for large area, since the liquid crystal injection time becomes longer as the liquid crystal panel is enlarged.

Accordingly, the present invention has been made to solve the above problems, and the liquid crystal is dropped directly onto the glass substrate having a large area including at least one liquid crystal panel, and the liquid crystal dropped by the panel bonding pressure is applied to the entire panel. The present invention provides a method for manufacturing a liquid crystal display device which can improve the process efficiency of a liquid crystal display device by quickly forming a liquid crystal layer by uniformly distributing it over.

Another object of the present invention is to form a protrusion extending to the dummy region on one side of the seal pattern when applying the liquid crystal dropping method, sufficient liquid crystal is dropped on the glass substrate, the liquid crystal overfilled through the cut protrusion during the cutting process The present invention provides a method for manufacturing a liquid crystal display device capable of preventing gravity defects of liquid crystals by pressing and sealing the cut protrusions after discharging or injecting them.

The present invention for achieving the above object comprises the steps of preparing a first substrate having a plurality of first panels; Preparing a second substrate on which a plurality of second panels are formed; Defining an active region and a dummy region on an outer side of the panel, and forming a seal pattern having a protrusion extending at one side thereof to the dummy region; Dropping a liquid crystal having a reference value or more into the active region; Bonding the first and second substrates to each other by the seal pattern; Cutting the first and second substrates to separate a plurality of liquid crystal panels to which the first panel and the second panel are joined, while cutting a part of the protrusion of the seal pattern to leave a part of the seal pattern formed on the protrusion; And when the amount of liquid crystal exceeds the set reference value, pressurizing the liquid crystal panel to rupture the seal pattern remaining in the protrusion of the seal pattern to form an opening, and then removing excess liquid crystal inside the liquid crystal panel through the opening. It provides a method of manufacturing a liquid crystal display device comprising.

A portion of the protrusion of the seal pattern is cut to form an opening.
When the amount of liquid crystal exceeds the set reference value, the liquid crystal panel is pressurized to remove the excess liquid crystal filled in the panel through the opening. When the amount of liquid crystal falls below the set reference value, the liquid crystal unfilled through the opening is removed. It is characterized in that the input into the panel by a predetermined amount.

At this time, further comprising the step of sealing the opening.

In this case, the width of the seal pattern remaining in the protruding portion may be formed in a closed shape that is ruptured by the liquid crystal inside the liquid crystal panel when pressed.

When the amount of liquid crystal exceeds the set reference value, the liquid crystal panel is pressed to rupture the seal pattern left in the protrusion of the seal pattern to form an opening, and then the excess liquid crystal inside the liquid crystal panel is removed through the opening. .

The sealing of the opening may include: putting a sealing material into the opening; And curing the seal material.

The first panel is a thin film transistor array panel, and the second panel is a color filter panel. The seal pattern is formed on the thin film transistor array panel, and the liquid crystal is dropped on the color filter substrate. The seal pattern may be formed on the color filter panel, and the liquid crystal may be formed on the thin film transistor array panel. However, in the present invention, the substrate for forming the seal pattern and the substrate for dropping the liquid crystal are not limited to the specific substrate.

In addition, the present invention comprises the steps of preparing a first substrate formed with a plurality of first panels, preparing a second substrate formed with a plurality of second panels, a seal having a protrusion protruding to one side on the outside of the panel Forming a pattern, dropping a liquid crystal having a reference value or more into the panel region, bonding the first and second substrates by the seal pattern, curing the seal pattern, and sealing the seal pattern. Cutting the first and second substrates along an outer edge of the substrate, separating the plurality of bonded liquid crystal panels of the first panel and the second panel, and cutting the protrusions of the seal pattern together; It provides a method of manufacturing a liquid crystal display device comprising the step of discharging a portion of the liquid crystal dropped into the liquid crystal panel through the protrusion, and sealing the cut protrusion by using an encapsulant.

In addition, the present invention comprises the steps of preparing a first substrate having a plurality of first panels; Preparing a second substrate on which a plurality of second panels are formed; Forming a seal pattern having a protrusion protruding toward one side of the panel; Dropping a liquid crystal having a reference value or more into the panel region; Bonding the first and second substrates to each other by the seal pattern; Hardening the seal pattern; The first and second substrates are cut along the outer edge of the seal pattern to separate a plurality of bonded liquid crystal panels of the first panel and the second panel, so that a part of the seal pattern formed on the protrusion of the seal pattern remains. Cutting; Pressing the liquid crystal panel to rupture the seal pattern formed in the protrusion to form an opening; Discharging a portion of the liquid crystal dropped into the liquid crystal panel through the opening; And it provides a method for manufacturing a liquid crystal display device comprising the step of sealing the opening using an encapsulant.

As described above, the present invention relates to a method of manufacturing a liquid crystal display device through a liquid crystal dropping method. In particular, the present invention allows the formation of an optimum amount of liquid crystal inside the liquid crystal panel by removing excess liquid crystal dropped during liquid crystal dropping or refilling the unfilled liquid crystal.

The liquid crystal dropping method forms a liquid crystal layer by dropping and dispensing a liquid crystal directly onto a substrate and uniformly distributing the liquid crystal dropped by the panel's bonding pressure throughout the panel. Since the liquid crystal dropping method directly drops the liquid crystal onto the substrate for a short time, the liquid crystal layer formation of the large area liquid crystal display device proceeds very quickly, thereby shortening the processing time of the liquid crystal display device and improving productivity. Has an advantage.

On the other hand, in the liquid crystal dropping method, since the seal pattern is formed in a closed curve along the outer edge of the panel, when the dropping amount of the liquid crystal exceeds the reference value, the thickness of the liquid crystal layer becomes larger than the cell gap of the set liquid crystal panel. As such, when the set cell gap and the thickness of the liquid crystal layer are changed, the transmittance of the liquid crystal is changed, thereby degrading the screen display characteristics (this is called gravity failure).

Therefore, in the present invention, by providing an opening on one side of the seal pattern, by removing the liquid crystal exceeding the reference value, the above-described gravity failure is solved. That is, in the present invention, by forming a protrusion on one side of the seal pattern and cutting the protrusion together in the process of cutting the liquid crystal panel, the excess liquid crystal inside the liquid crystal panel is removed through the cut protrusion.

However, when an opening is made by removing all the protruding portions of the failure turn during the cutting process, external bubbles may flow through the opening due to the pressure difference between the pressure of the liquid crystal layer of the liquid crystal panel and the external pressure. Therefore, the present invention removes only a part of the seal pattern formed on the protrusions without removing all of them, and ruptures the seal pattern remaining in the protrusions during the pressing process to remove the excess liquid crystal, and then the excess liquid crystal through the region where the seal pattern is broken By removing this, bubbles can be prevented from flowing in.

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

4 is a view showing a basic concept of the liquid crystal dropping method. As shown in the drawing, in the liquid crystal dropping method, before the lower substrate 105 and the upper substrate 103 on which the thin film transistor TFT and the color filter are formed are bonded, the liquid crystals are formed in a drop shape on the lower substrate 105. 107) is dropped. The liquid crystal 107 may be dropped on the substrate 103 on which the color filter is formed. In other words, the substrate to be the liquid crystal dropping method in the liquid crystal dropping method can be either a TFT substrate or a CF substrate. However, when the substrates are bonded, the substrate on which the liquid crystal is dropped must be placed at the bottom.

In this case, a seal pattern 109 is applied to the outer region of the upper substrate 103 to apply pressure to the upper substrate 103 and the lower substrate 105 so that the upper substrate 103 and the lower substrate 105 are formed. At the same time, the droplets of the liquid crystal 107 are spread out by the pressure, and a liquid crystal layer is formed between the upper substrate 103 and the lower substrate 105. In other words, the biggest feature of the liquid crystal dropping method is that the liquid crystal 107 is previously dropped on the lower substrate before the panel 101 is bonded, and then the panel is bonded by the seal pattern 109.

The method of manufacturing a liquid crystal display device using the liquid crystal dropping method has the following difference from the manufacturing method of the conventional liquid crystal injection method. In the conventional liquid crystal injection method, a glass substrate having a large area in which a plurality of panels are formed is separated into panel units, and liquid crystal is injected. Processing can be separated in units. This process difference provides many advantages when manufacturing an actual liquid crystal display device. Of course, there is an advantage of the liquid crystal dropping method itself (that is, the advantage of the rapid generation of the liquid crystal layer), but there is also an advantage resulting from forming the liquid crystal layer by the glass substrate unit formed with a plurality of panels. For example, when four liquid crystal panels are formed on a glass substrate, in the process of forming the liquid crystal layer by the liquid crystal injection method, the same conditions (the same liquid crystal container, the same injection) are injected when the liquid crystal is injected into each of the processed four liquid crystal panels at once. The liquid crystal panel having the same cell gap can be formed by a pressure or the like, but in the liquid crystal dropping method, a liquid crystal panel having different cell gaps can be formed by controlling the amount of liquid crystal dropped on the four liquid crystal panels by one drop. Will be.

On the other hand, in the liquid crystal dropping method, the liquid crystal is dropped onto the substrate through liquid crystal dropping. When the liquid crystal panel cell gaps formed on the same substrate are different from each other, it is troublesome to precisely control the amount of liquid crystal dropped on each liquid crystal panel. This will occur. In addition, in the liquid crystal dropping system, the amount of liquid crystal dropped on the liquid crystal panel falls short of or exceeds the set reference value. Here, the set reference value of the liquid crystal amount means the amount of liquid crystal that can be filled in the cell gap region of the liquid crystal panel.

On the other hand, in the liquid crystal dropping method, since the seal pattern is formed in the shape of a closed curve along the periphery of the liquid crystal panel, and the liquid crystal panel is bonded after the liquid crystal is dropped, even if the amount of liquid crystal falls below or exceeds the set reference value, It is not possible to further inject liquid crystals or to remove liquid crystals that are overfilled.

Accordingly, the present invention has been made in particular to solve this problem, and provides a method of manufacturing a liquid crystal display device that can solve the above problems by forming a seal pattern to remove the liquid crystals filled in the liquid crystal panel. That is, a protrusion protruding outward is formed on one side of the seal pattern, and sufficient liquid crystal is dropped on the substrate. In addition, after the liquid crystal panel is bonded, a part of the protruding seal pattern is cut together to form an opening in the process of separating the liquid crystal panel, thereby removing the overfilled liquid crystal through the opening.

5 shows a process flowchart of the liquid crystal display device to which the liquid crystal drop method is applied as described above, and FIGS. 6 to 10 b illustrate specific manufacturing methods according to the process sequence. Therefore, the manufacturing method of the liquid crystal display device according to the present invention will be described with reference to FIGS. 5 and 6 to 10b.

5 and 6, after preparing the substrate 200 in which the panel region 210 and the dummy region 230 are defined, each of the different substrates 200 through the TFT array process and the color filter process. TFTs and color filter layers (not shown) which are driving elements are formed, respectively (S201 and S202). The TFT array process and the color filter process are performed in the same manner as the conventional manufacturing method shown in FIG. 2 and collectively proceed to the large-area glass substrate 200 in which the plurality of panel regions 210 are formed. In particular, since the liquid crystal dropping method is applied in the manufacturing method, it may be usefully used in a larger glass substrate, for example, a large area glass substrate having an area of 1000 x 200 mm ² or more compared with the conventional manufacturing method.

Subsequently, after the alignment layer is applied to the thin film transistor array substrate on which the TFT is formed and the color filter substrate on which the color filter layer is formed, rubbing is performed (S202 and S205), the liquid crystal is dropped in the liquid crystal panel region of the color filter substrate, and the thin film transistor Seal patterns are applied to the outer region of the liquid crystal panel of the array substrate (S203 and S206). In this case, the liquid crystal may be dropped on the thin film transistor array substrate, and the seal pattern may be applied onto the color filter substrate, and the liquid crystal drop and the seal pattern may be applied to the same substrate.

7A and 7B are detailed views illustrating a liquid crystal drop and a seal pattern forming process. As shown in FIG. 7A, in the liquid crystal dropping process, after the liquid crystal dropping 220 is positioned on the color filter substrate 200a and the substrate 200a is moved, a necessary area, that is, the panel area 210a, is moved. Is added dropwise to the liquid crystal 250a. At this time, the liquid crystal 250a dropped in the panel region 210a is above the set reference value, and the liquid crystal is overfilled in the cell gap region.

Meanwhile, as shown in FIG. 7B, the seal pattern is formed along the panel region 210b of the thin film transistor array substrate 200b, and one side of the seal pattern 300 is formed to be outside the panel region 210b. do. That is, the protrusion 350 is formed on one side of the seal pattern 300 out of the panel area 210b and protrudes into the dummy area 230.

As described above, the liquid crystal 250a is dropped on the color filter substrate 210a, the seal pattern 300 is formed on the thin film transistor array substrate 210b, and then the color filter substrate 210a and the thin film transistor are formed. Applying pressure while the array substrate 210b is aligned, bonding the color filter substrate 210a and the thin film transistor array substrate 210b with the seal pattern 300 and simultaneously dropping the liquid crystal dropped by application of pressure. Spread uniformly throughout (S207). By such a process, a plurality of liquid crystal panels in which a liquid crystal layer is formed are formed on the glass substrate (lower substrate and upper substrate) of a large area (S207).

FIG. 8 is a cross-sectional view of the liquid crystal panel. As shown in the drawing, the liquid crystal layer 250 filled between the color filter substrate 200a and the thin film transistor array substrate 200b is formed to have a thickness greater than a set cell gap. do. This is because sufficient liquid crystal was dripped in the step of dripping liquid crystal (more than a reference value).

Subsequently, the substrate is processed, cut and separated into a plurality of liquid crystal panels (S208). That is, as shown in FIG. 9A, the plurality of liquid crystal panels are separated along the cutting line of the substrate 200, but the seal pattern 300 also cuts the protrusions protruding into the dummy region, thereby the seal pattern 300. The opening 370 is formed at one side of the.

In this case, as shown in FIG. 11, a part of the seal pattern formed on the protrusion 350 may be formed to span the cutting line of the dummy region, which will be described later.

Thereafter, the liquid crystal overfilled through the pressing process is removed (S209). That is, as shown in FIG. 9B, the color filter substrate 200a and the thin film transistor array substrate 200b are pressed to remove the liquid crystal overfilled in the liquid crystal layer 250 through the opening 370. The height of the liquid crystal layer is made equal to the height of the set cell gap.

Alternatively, the liquid crystal may be introduced through the opening 370.

As such, after removing the overfilled liquid crystal, the opening is sealed with an encapsulant, thereby completing the liquid crystal display device (S210). That is, as shown in FIGS. 10A and 10B, the cut seal pattern 300 is sealed with the encapsulant 400, thereby manufacturing a liquid crystal display device.

The sealing of the encapsulant 400 is made by injecting a sealing material into the opening and curing the sealing material.

As described above, the manufacturing method of the liquid crystal display device by the liquid crystal dropping method has a simple process compared to the manufacturing method by the liquid crystal injection method, so that not only the manufacturing efficiency can be improved but also the yield can be improved.

On the other hand, the manufacturing method of the liquid crystal display device according to the present invention has an opening on one side of the liquid crystal panel by forming a protrusion protruding into the dummy region on one side of the seal pattern, and in the step of separating the liquid crystal panel, by cutting the protrusion. Form a seal pattern. In addition, by removing the liquid crystal overfilled in the liquid crystal panel through the opening to maintain the same height of the cell gap and the liquid crystal layer, it is possible to prevent the degradation of the image quality by the unfilled or overfilled liquid crystal.

The liquid crystal display device through the liquid crystal dropping method has an advantage that can proceed quickly, but if the exact amount of liquid crystal is not removed, the image quality degradation due to the unfilled or overfilled liquid crystal is generated. In particular, since it is difficult to finely control the amount of liquid crystal according to the cell gap, it is necessary to control the amount of liquid crystal in accordance with the model of the liquid crystal display device. In particular, when several models are formed together in one substrate (Multi Model Glass), The trouble of having to control the liquid crystal amount in each panel region occurs.

Therefore, in the present invention, when dropping the liquid crystal, by dropping a sufficient liquid crystal of the reference value or more, and then removing it, it is possible to form the correct amount of liquid crystal in the liquid crystal panel without the hassle as described above. As described above, this is made possible by forming a protrusion that protrudes into the dummy area when forming the seal pattern. That is, after bonding the liquid crystal panels, in the separating of the plurality of liquid crystal panels, by cutting the protrusions together to form an opening on one side of the seal pattern, the liquid crystals overfilled through the openings can be removed. have. It is also possible to refill the unfilled liquid crystal through the opening.

However, according to the present invention as described above, since the pressure difference between the liquid crystal layer and the outside of the liquid crystal panel is formed by completely removing the protruding seal pattern, bubbles are generated from the outside through the opening. Can be introduced.

Therefore, in order to prevent bubbles from being generated in the liquid crystal layer, the present invention may minimize the bubble generation by preventing the liquid crystal layer from being exposed to the outside as much as possible without leaving the protrusion of the seal pattern completely.

That is, as shown in Figure 11, after the cutting process, by leaving a part of the seal pattern protruding on the substrate, it is possible to maintain the pressure inside the liquid layer. Subsequently, the seal pattern 300 ′ formed in the protruding region may be ruptured through the pressing process, and at the same time, the overfilled liquid crystal may be removed through the region in which the seal pattern is ruptured.

In this way, instead of completely removing the protruding portion of the seal pattern in the cutting step to form the opening portion, by leaving a part of the seal pattern, bubbles can be prevented due to the pressure difference between the liquid crystal layer and the outside. That is, in the case of forming the opening by completely removing the seal pattern protruding in the cutting process, since the liquid crystal layer is exposed to the outside through the opening until the pressing process is performed, due to the pressure difference between the liquid crystal layer and the outside, the opening Bubbles can be introduced from outside. Therefore, in the present embodiment, a part of the seal pattern is also left in the protrusion of the seal pattern during the cutting process, so that the liquid crystal layer is not exposed to the outside until just before the pressing process, and the pressure inside the liquid crystal layer is maintained, and the pressing process In the liquid crystal layer between the cutting process and the pressing process, the seal pattern remaining at the protrusion part is ruptured due to the pressure applied to the liquid crystal panel, and an opening is formed, and the liquid crystal overfilled through this region is removed. Bubbles can be prevented from occurring.

As described above, the present invention forms a seal pattern protruding into the dummy region in the liquid crystal display device through the liquid crystal dropping method, and in the cutting process of separating the liquid crystal panel, a part of the protruding seal pattern is cut to open the opening. By forming, it is possible to remove the overfilled liquid crystal in the liquid crystal panel through the opening or to re-enter the unfilled liquid crystal. Therefore, in the present invention, when the liquid crystal dropping, sufficient liquid crystal of the reference value or more should be dropped, and the seal pattern sealing step of sealing the opening should be further performed.

Furthermore, in the present invention, by leaving a part of the seal pattern formed in the protrusion in the cutting process, the pressure inside the liquid crystal layer is maintained even after the cutting process, thereby effectively preventing the flow of bubbles into the liquid crystal layer from the outside.

Meanwhile, in the present invention, the excess liquid crystal may be removed, but the unfilled liquid crystal may be introduced through the opening formed by the pressure of the liquid crystal panel.

As described above, the present invention can improve the productivity by simplifying the process by manufacturing the liquid crystal display device through the liquid crystal dropping method.

In addition, the present invention by removing the overfilled liquid crystal in the liquid crystal panel through the seal pattern protruding into the dummy region or by refilling the unfilled liquid crystal, to prevent the poor gravity due to the unfilled or overfilled liquid crystal, thereby improving the image quality It can be improved further.

Claims (16)

Preparing a first substrate on which a plurality of first panels are formed; Preparing a second substrate on which a plurality of second panels are formed; Defining an active region and a dummy region on an outer side of the panel, and forming a seal pattern having a protrusion extending at one side thereof to the dummy region; Dropping a liquid crystal having a reference value or more into the active region; Bonding the first and second substrates to each other by the seal pattern; Cutting the first and second substrates to separate a plurality of liquid crystal panels to which the first panel and the second panel are joined, while cutting a part of the protrusion of the seal pattern to leave a part of the seal pattern formed on the protrusion; And If the amount of liquid crystal exceeds the set reference value, pressurizing the liquid crystal panel to rupture the seal pattern remaining in the protrusion of the seal pattern to form an opening, and then removing the excess liquid crystal inside the liquid crystal panel through the opening. Method of manufacturing a liquid crystal display device. delete delete delete delete delete The method of claim 1, The width of the seal pattern remaining in the protruding portion is a manufacturing method of the liquid crystal display device, characterized in that formed in a closed type to the extent that it is broken by the liquid crystal inside the liquid crystal panel when pressed. delete The method of claim 1, A method of manufacturing a liquid crystal display device, characterized in that it further comprises the step of sealing the opening. 10. The method of claim 9, Sealing the opening, Injecting a sealing material into the opening; And A method of manufacturing a liquid crystal display device, characterized in that it comprises the step of curing the seal material. The method of claim 1, Wherein the first panel is a thin film transistor array panel, and the second panel is a color filter panel. The method of claim 11, And the seal pattern is formed on the first panel. The method of claim 11, And the liquid crystal is dropped on the second panel. Preparing a first substrate on which a plurality of first panels are formed; Preparing a second substrate on which a plurality of second panels are formed; Forming a seal pattern having a protrusion protruding toward one side of the panel; Dropping a liquid crystal having a reference value or more into the panel region; Bonding the first and second substrates to each other by the seal pattern; Hardening the seal pattern; Cutting the first and second substrates along the outer edge of the seal pattern to separate a plurality of bonded liquid crystal panels of the first panel and the second panel, and cutting the protrusions of the seal pattern together; Discharging a portion of the liquid crystal dropped into the liquid crystal panel through the cut protrusion; And And sealing the cut protrusion by using an encapsulant. The method of claim 14, And the first panel is a thin film transistor array panel, and the second panel is a color filter panel. Preparing a first substrate on which a plurality of first panels are formed; Preparing a second substrate on which a plurality of second panels are formed; Forming a seal pattern having a protrusion protruding toward one side of the panel; Dropping a liquid crystal having a reference value or more into the panel region; Bonding the first and second substrates to each other by the seal pattern; Hardening the seal pattern; The first and second substrates are cut along the outer edge of the seal pattern to separate the plurality of bonded liquid crystal panels of the first panel and the second panel, so that a part of the seal pattern formed on the protrusion of the seal pattern remains. Cutting; Pressing the liquid crystal panel to rupture the seal pattern formed in the protrusion to form an opening; Discharging a portion of the liquid crystal dropped into the liquid crystal panel through the opening; And And sealing the opening by using an encapsulant.

Images