KR20130066917A - Fringe field switching liquid crystal display device having align key and method of fabricating fringe field switching liquid crystal display device using thereof - Google Patents

Abstract

A method of manufacturing a fringe field switching (FFS) liquid crystal display device having an alignment key of the present invention and a fringe field type liquid crystal display device using the same includes an electrode common electrode and a black matrix (BM). A key for alignment between the array substrate and the color filter substrate is formed to prevent opening light leakage due to misalignment when the panel is bonded, and is formed in the dummy area of the array substrate and formed of a plurality of patterns. 1 lock key; And a second bonding key formed in a dummy region of the color filter substrate, the second bonding key having a plurality of BM patterns, and the BM of the pattern of the first bonding key and the second bonding key when the array substrate and the color filter substrate are bonded together. The BM of the color filter substrate and the common electrode of the array substrate may be aligned using a pattern.

Description

Fringe field type liquid crystal display device having a bonding key and manufacturing method of fringe field type liquid crystal display device using the same

The present invention relates to a fringe field type liquid crystal display device having a bonding key and a method of manufacturing a fringe field type liquid crystal display device using the same.

Recently, interest in information display has increased, and a demand for using portable information media has increased, and a light-weight flat panel display (FPD) that replaces a cathode ray tube (CRT) And research and commercialization are being carried out. Particularly, among such flat panel display devices, a liquid crystal display (LCD) is an apparatus for displaying an image using the optical anisotropy of a liquid crystal, and is excellent in resolution, color display and picture quality and is actively applied to a notebook or a desktop monitor have.

The liquid crystal display comprises a color filter substrate, an array substrate, and a liquid crystal layer formed between the color filter substrate and the array substrate.

Hereinafter, a general liquid crystal display device will be described in detail with reference to the drawings.

1 is an exploded perspective view schematically showing a structure of a general liquid crystal display device.

As shown in the figure, a general liquid crystal display device is largely a color filter substrate 5 and an array substrate 10 and a liquid crystal layer (liquid crystal layer) formed between the color filter substrate 5 and the array substrate 10 ( 30).

The color filter substrate 5 includes a color filter C composed of a plurality of sub-color filters 7 for implementing colors of red (R), green (G), and blue (B); A black matrix (BM) 6 that separates the sub-color filters 7 and blocks light passing through the liquid crystal layer 30, and a transparent common that applies a voltage to the liquid crystal layer 30. It consists of an electrode 8.

In addition, the array substrate 10 may be arranged vertically and horizontally to define a plurality of gate lines 16 and data lines 17 and a plurality of gate lines 16 and data lines 17 that define a plurality of pixel regions P. The thin film transistor T, which is a switching element formed in the cross region, and the pixel electrode 18 formed on the pixel region P, are formed.

The color filter substrate 5 and the array substrate 10 configured as described above are joined to face each other by sealants (not shown) formed on the outer side of the image display area to form a panel, and the color filter substrate 5 And the bonding of the array substrate 10 is made through a bonding key (not shown) formed in the color filter substrate 5 or the array substrate 10.

At this time, the driving method generally used in the liquid crystal display device is a twisted nematic (TN) method for driving the nematic liquid crystal molecules in a vertical direction with respect to the substrate, but the liquid crystal display device of the twisted nematic method Has the disadvantage that the viewing angle is as narrow as 90 degrees. This is due to the refractive anisotropy of the liquid crystal molecules because the liquid crystal molecules oriented horizontally with the substrate are oriented almost perpendicular to the substrate when a voltage is applied to the panel.

Accordingly, there is an In Plane Switching (IPS) type liquid crystal display device in which a liquid crystal molecule is driven in a horizontal direction with respect to a substrate to improve the viewing angle to 170 degrees or more.

2 is a cross-sectional view schematically illustrating a part of a general transverse electric field type liquid crystal display device.

As shown in the figure, a gate line (not shown) and a data line 17 are arranged in the array substrate 10 of a general transverse electric field type liquid crystal display device vertically and horizontally on the transparent array substrate 10 to define a pixel area. And a thin film transistor, which is a switching element, is formed in an intersection region of the gate line and the data line 17.

The thin film transistor includes a gate electrode 21 connected to the gate line, a source electrode 22 connected to the data line 17, and a drain electrode 23 connected to the pixel electrode 18. In addition, the thin film transistor is formed by the gate insulating film 15a for insulation between the gate electrode 21 and the source / drain electrodes 22 and 23 and the gate electrode supplied by the gate voltage supplied to the gate electrode 21. An active layer 24 is formed between the 22 and the drain electrode 23 to form a conductive channel.

In this case, the source / drain regions of the active layer 24 form ohmic contacts with the source / drain electrodes 22 and 23 through an ohmic contact layer 25n.

In the pixel region, the common electrode 8 and the pixel electrode 18 are alternately formed to generate a horizontal electric field in the liquid crystal layer.

In this case, the pixel electrode 18 is electrically connected to the drain electrode 23 through contact holes formed in the first passivation layer 15b and the second passivation layer 15c.

The array substrate 10 configured as described above is bonded to the color filter substrate 5 by sealants (not shown) formed on the outer side of the image display area in a state where a constant cell gap is maintained by the column spacer 50. In this case, the color filter substrate 5 implements a black matrix (BM) 6 that prevents light from leaking to the thin film transistor, the gate line, and the data line 17, and red, green, and blue colors. A color filter and an overcoat layer 9 composed of sub-color filters 7 are formed.

In the transverse electric field type liquid crystal display device, alignment is performed by using a bonding key formed of a gate pattern and a BM pattern to bond the array substrate and the color filter substrate.

On the other hand, there is a Fringe Field Switching (FFS) with improved transmittance and viewing angle compared to the transverse electric field type liquid crystal display device. In the case of the Fringe Field type liquid crystal display device, the conventional twisted nematic method On the contrary, it is necessary to manage the alignment between the added common electrode and the BM.

That is, in the case of the transverse electric field type liquid crystal display device, a horizontal electric field is generated only between the common electrode and the pixel electrode, so that the transmittance is low in the electrode portion. Therefore, the alignment between the electrode part common electrode and the BM is not essential.

However, in the case of the fringe field type liquid crystal display device, since not only a horizontal electric field but also a vertical electric field is generated between the common electrode and the pixel electrode, the liquid crystal is twisted in the electrode part, and thus the electrode part has a high transmittance. Accordingly, when the alignment between the electrode unit common electrode and the BM is misaligned, light leakage may occur, so it is necessary to manage it.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and in a fringe field type liquid crystal display device for realizing a high resolution and a wide viewing angle, it is possible to manage the alignment between the electrode unit common electrode and the black matrix (BM). The present invention provides a fringe field type liquid crystal display device having a bonding key, and a method of manufacturing the fringe field type liquid crystal display device using the same.

Other objects and features of the present invention will be described in the configuration and claims of the invention which will be described later.

In order to achieve the above object, the manufacturing method of the fringe field type liquid crystal display device of the present invention comprises the steps of forming a thin film transistor, a pixel electrode and a common electrode on the array substrate; Forming a first bonding key having a plurality of patterns in the dummy region of the array substrate; Forming a black matrix (BM) and a color filter on the color filter substrate; Forming a second bonding key formed of a plurality of BM patterns in a dummy region of the color filter substrate; And forming a panel by bonding the array substrate and the color filter substrate together, wherein the array substrate is formed using the BM pattern of the first bonding key and the second bonding key when the array substrate and the color filter substrate are bonded together. And aligning the common electrode of the BM of the color filter substrate.

In this case, the common electrode may have a plurality of slits in the pixel area, and the pattern may be formed such that a portion bent adjacent to the upper right side of the gate electrode is inclined diagonally.

At this time, the first bonding key is characterized by consisting of a first pattern, a second pattern, a third pattern, a fourth pattern and a fifth pattern.

In this case, the first pattern and the second pattern are formed together when forming the gate wiring, and the third pattern is formed together when forming the data wiring.

The fourth pattern is a pattern for aligning the column spacer, and the fifth pattern is formed together when forming the common electrode.

In this case, the fifth pattern has a hole arranged in a matrix of 5x5 in the quadrangle, and the common electrode pattern of the portion bent adjacent to the upper right side of the gate electrode is inclined to match the inclination angle. do.

The second engagement key may include a first BM pattern, a second BM pattern, a third BM pattern, a fourth BM pattern, and a fifth BM pattern corresponding to the first engagement key.

The first BM pattern, the second BM pattern, the third BM pattern, the fourth BM pattern, and the fifth BM pattern may be formed together when forming the BM on the color filter substrate.

The fifth BM pattern has a dot shape of a 5x5 matrix to be located in a hole arranged in a 5x5 matrix of the fifth pattern, and the dot shape of the 5x5 matrix is inclined to coincide with an inclination angle of the common electrode pattern. It is characterized by forming a fork.

The dummy region of the array substrate and the color filter substrate may be positioned at corners of the array substrate and the color filter substrate on which no image is displayed.

A fringe field type liquid crystal display device having a bonding key according to the present invention includes: a first bonding key formed in a dummy region of the array substrate and having a plurality of patterns; And a second bonding key formed in a dummy region of the color filter substrate, the second bonding key having a plurality of BM patterns, and the BM of the pattern of the first bonding key and the second bonding key when the array substrate and the color filter substrate are bonded together. The BM of the color filter substrate and the common electrode of the array substrate may be aligned using a pattern.

In this case, the common electrode has a plurality of slits in the pixel region, and a pattern is formed such that a portion bent adjacent to the upper right side of the gate electrode is inclined diagonally.

At this time, the first bonding key is characterized by consisting of a first pattern, a second pattern, a third pattern, a fourth pattern and a fifth pattern.

In this case, the first pattern and the second pattern is formed together when forming the gate wiring, and the third pattern is formed together when forming the data wiring.

The fourth pattern is a pattern for aligning the column spacer, and the fifth pattern is formed together when forming the common electrode.

In this case, the fifth pattern has a hole arranged in a matrix of 5x5 in a quadrangle, and the common electrode pattern of a portion bent adjacent to the upper right side of the gate electrode is inclined to correspond to an inclination angle. .

The second engagement key may include a first BM pattern, a second BM pattern, a third BM pattern, a fourth BM pattern, and a fifth BM pattern corresponding to the first engagement key.

In this case, the first BM pattern, the second BM pattern, the third BM pattern, the fourth BM pattern and the fifth BM pattern is characterized in that formed together when forming the BM on the color filter substrate.

The fifth BM pattern has a dot shape of a 5x5 matrix to be located in a hole arranged in a 5x5 matrix of the fifth pattern, and the dot shape of the 5x5 matrix is inclined to coincide with an inclination angle of the common electrode pattern. It is characterized in that it is.

The dummy region of the array substrate and the color filter substrate may be positioned at corners of the array substrate and the color filter substrate on which no image is displayed.

As described above, the fringe field type liquid crystal display device having the bonding key according to the present invention and the method for manufacturing the fringe field type liquid crystal display device using the same are provided with an array substrate and a color key for alignment between the common electrode and the BM. By forming on the filter substrate, opening light leakage due to misalignment during panel bonding can be prevented. Accordingly, the effect of improving the transmittance of the fringe field type liquid crystal display device can be obtained.

1 is an exploded perspective view schematically showing a structure of a general liquid crystal display device.
2 is a cross-sectional view schematically showing a part of a general transverse electric field type liquid crystal display device.
3 is a cross-sectional view schematically illustrating a part of a fringe field type liquid crystal display device according to an exemplary embodiment of the present invention.
4 is a plan view schematically illustrating a portion of an array substrate of a fringe field type liquid crystal display device according to an exemplary embodiment of the present invention.
5 is a plan view schematically illustrating a mother substrate to which a plurality of panel regions are allocated according to an exemplary embodiment of the present invention.
6 is a schematic representation of a cemented key formed on an array substrate in accordance with an embodiment of the present invention.
7 is a view schematically showing a bonding key formed on a color filter substrate according to an embodiment of the present invention.
8 is a flowchart sequentially illustrating a method of manufacturing a fringe field type liquid crystal display device according to an exemplary embodiment of the present invention.
9 is a flowchart sequentially illustrating another manufacturing method of a fringe field type liquid crystal display device according to an exemplary embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of a fringe field type liquid crystal display device having a bonding key according to the present invention and a fringe field type liquid crystal display device using the same.

3 is a cross-sectional view schematically illustrating a portion of a fringe field type liquid crystal display according to an exemplary embodiment of the present invention, in which a fringe field formed between the pixel electrode and the common electrode is positioned on the pixel region and the pixel electrode through the slit. A portion of a fringe field type liquid crystal display device which realizes an image by driving liquid crystal molecules is shown.

4 is a plan view schematically illustrating a portion of an array substrate of a fringe field type liquid crystal display device according to an exemplary embodiment of the present invention.

In this case, for convenience of description, one pixel including a TFT region and a data line region is shown. In an actual liquid crystal display device, N gate lines and M data lines cross and MxN pixels exist. For simplicity, one pixel is shown in the drawing.

As shown in the drawings, a gate line 116 in the array substrate 110 of the fringe field type liquid crystal display according to the exemplary embodiment of the present invention is vertically and horizontally arranged on the array substrate 110 to define a pixel region. And a data line 117 are formed. In addition, a thin film transistor, which is a switching element, is formed in an intersection region of the gate line 116 and the data line 117, and a pixel electrode 118 and a plurality of pixel electrodes that drive a liquid crystal molecule by generating a fringe field in the pixel region. A common electrode 108 having a slit 108s of is formed.

The thin film transistor includes a gate electrode 121 connected to the gate line 116, a source electrode 122 connected to the data line 117, and a drain electrode 123 electrically connected to the pixel electrode 118. It is. The thin film transistor may further include a gate voltage supplied to the gate insulating film 115a and the gate electrode 121 for insulation between the gate electrode 121 and the source / drain electrodes 122 and 123. The active layer 124 forms a conductive channel between the source electrode 122 and the drain electrode 123.

In this case, the source / drain regions of the active layer 124 form ohmic contacts with the source / drain electrodes 122 and 123 through the ohmic contact layer 125n.

A portion of the source electrode 122 extends in one direction to be connected to the data line 117, and a portion of the drain electrode 123 extends toward the pixel region to extend the first passivation layer 115b and the second passivation layer. Electrically connected to the pixel electrode 118 through the contact hole 140 formed in the (115c).

As described above, in order to generate a fringe field in the pixel area, the common electrode 108 and the pixel electrode 118 are formed with the third passivation layer 115d interposed therebetween, wherein the pixel electrode 118 is a pixel. It may be formed in a rectangular shape in the region. The common electrode 108 is formed in a single pattern over the entire pixel portion, and may be formed to have a plurality of slits 108s in the pixel region.

However, the present invention is not limited to the structures of the common electrode 108 and the pixel electrode 118, and the common electrode 108 and the pixel electrode 118 having a plurality of slits may form any fringe field as long as they form a fringe field. The common electrode 108 and the pixel electrode 118 of the structure can also be applied.

As illustrated in FIG. 3, the array substrate 110 configured as described above is a color filter substrate formed by a sealant (not shown) formed at an outside of the image display area in a state where a constant cell gap is maintained by the column spacer 150. Opposite to the 105, wherein the color filter substrate 105 is a black matrix (BM) (BM) to prevent light leakage from the thin film transistor, the gate line 116 and the data line 117 ( 106 and a color filter and overcoat layer 109 formed of sub-color filters 107 for implementing red, green and blue colors.

In this case, as described above, in the case of the general transverse electric field type liquid crystal display device, the gate substrate and the BM pattern may be aligned only when the array substrate and the color filter substrate are bonded to each other, but the fringe field type liquid crystal display device includes the electrode unit common electrode 108. If the alignment of the and BM 106 is misaligned, there is a possibility that light leakage may occur.

Therefore, in the present invention, when the mask is designed, a key for aligning the electrode common electrode 108 and the BM 106 is additionally formed on the array substrate 110 and the color filter substrate 105. Therefore, it is possible to prevent light leakage due to misalignment when the panel is bonded, thereby improving process capability and quality level.

In this case, the region where the BM 106 is formed is a region where the thin film transistor, the gate line 116, and the data line 117 are formed as described above. That is, the region where light leakage occurs during misalignment is a portion (A portion shown in FIG. 4) bent adjacent to the upper right side of the gate electrode 121.

In this case, the pattern of the common electrode 108 is inclined diagonally as shown in the opening, and thus the key pattern needs to be inclined.

5 is a plan view schematically illustrating a mother substrate to which a plurality of panel regions are allocated according to an exemplary embodiment of the present invention.

6 is a diagram schematically illustrating a bonding key formed on an array substrate according to an embodiment of the present invention, and FIG. 7 is a diagram schematically illustrating a bonding key formed on a color filter substrate according to an embodiment of the present invention.

Referring to FIG. 5, a plurality of color filter substrates 105 and an array substrate 110 are partitioned and manufactured in each of the mother substrate 100 having a large area. In other words, a plurality of panel regions 150 are defined in the mother substrate 100 having a large area, and a thin film transistor or a color filter, which is a driving element, is formed in each of the panel regions 150.

In this case, a bonding key 160 is formed in a predetermined region of the plurality of color filter substrates 105 and the array substrate 110 when the color filter substrate 105 and the array substrate 110 are bonded to each other. In this case, the bonding key 160 is formed at each of the four corners of the color filter substrate 105 and the array substrate 110, for example, but the present invention is not limited thereto.

Referring to FIG. 6, the first bonding key 160a formed on the array substrate 110 may include a first pattern 161a, a second pattern 162a, a third pattern 163a, and a fourth pattern 164a. And a fifth pattern 165a.

In this case, the first pattern 161a and the second pattern 162a are formed together when forming a gate wiring, that is, a gate electrode and a gate line, and the third pattern 163a is formed of a data wiring, that is, a source electrode. When the drain electrode and the data line are formed, they are formed together.

The fourth pattern 164a is a pattern for aligning the column spacers, and the fifth pattern 165a is formed together when forming the common electrode.

In this case, the fifth pattern 165a has a hole arranged in a matrix of 5x5 in a quadrangle, and the common electrode pattern of a portion bent adjacent to the upper right side of the gate electrode is inclined to correspond to the inclined angle. It is done. However, the present invention is not limited to the shape of the fifth pattern 165a, and may be any shape as long as the common electrode pattern is inclined to match the inclination angle.

In addition, referring to FIG. 7, the second bonding key 160b formed on the color filter substrate 105 corresponds to the first bonding key 160a of the array substrate 110. The first BM pattern 161b corresponds to the first bonding key 160a of the array substrate 110. The second BM pattern 162b, the third BM pattern 163b, the fourth BM pattern 164b, and the fifth BM pattern 165b may be formed.

The fifth BM pattern 165b has a dot shape of a 5x5 matrix so as to be located in a hole arranged in a 5x5 matrix of the fifth pattern 165a, and the dot shape of the 5x5 matrix also has a common electrode pattern inclined. It is characterized by inclined to match the angle.

In this case, the first BM pattern 161b, the second BM pattern 162b, the third BM pattern 163b, the fourth BM pattern 164b, and the fifth BM pattern 165b may be formed on the color filter substrate 105. When the BM is formed in the will be formed together.

Through the alignment of the first and second patterns 161a and 162a and the first and second BM patterns 161b and 161b, the gate wiring and the BM are aligned, and the third pattern 163a and the third Through the alignment of the BM patterns 163b, the data lines and the BMs are aligned.

In addition, the common electrode and the BM are aligned through the alignment of the fifth pattern 165a and the fifth BM pattern 165b.

Hereinafter, a method of manufacturing a fringe field type liquid crystal display device having a bonding key according to an embodiment of the present invention configured as described above will be described in detail with reference to the accompanying drawings.

8 is a flowchart sequentially illustrating a method of manufacturing a fringe field type liquid crystal display device according to an exemplary embodiment of the present invention, and FIG. 9 is a flowchart of another manufacturing method of a fringe field type liquid crystal display device according to an exemplary embodiment of the present invention. It is a flow chart.

8 illustrates a method of manufacturing a fringe field type liquid crystal display device when a liquid crystal layer is formed by a liquid crystal injection method, and FIG. 9 illustrates a fringe field type liquid crystal display device when a liquid crystal layer is formed by a liquid crystal drop method. The manufacturing method of this is shown.

The manufacturing process of the fringe field type liquid crystal display device may be classified into a driving element array process of forming a driving element on a lower array substrate, a color filter process of forming a color filter on an upper color filter substrate, and a cell process.

First, a plurality of gate lines and data lines which are arranged in an array substrate and define a pixel region are formed by an array process, and a thin film transistor which is a driving element connected to the gate line and the data line is formed in each of the pixel regions (S101 ). In addition, the pixel electrode and the common electrode for driving the liquid crystal layer are formed by being connected to the thin film transistor through the array process and applying a signal through the thin film transistor.

In this case, a first bonding key including a first pattern, a second pattern, a third pattern, a fourth pattern, and a fifth pattern is formed in a predetermined region of the array substrate.

As described above, the first pattern and the second pattern of the first bonding key are formed together when forming the gate wiring, and the third pattern is formed together when forming the data wiring. The fourth pattern is a pattern for aligning the column spacer, and the fifth pattern is formed together when forming the common electrode.

In this case, the common electrode has a plurality of slits in the pixel area, and a pattern is formed such that a portion bent adjacent to the upper right side of the gate electrode is inclined at a predetermined angle, so that the fifth pattern of the first bonding key is The common electrode pattern is formed to be inclined to match the inclined angle.

That is, the fifth pattern has holes arranged in a matrix of 5 × 5 in a quadrangle, and the common pattern is inclined to correspond to an inclined angle. However, the present invention is not limited to the shape of the fifth pattern, and may be any shape as long as the common electrode pattern is formed to be inclined to match the inclination angle.

In addition, a color filter layer is formed on the color filter substrate including a BM for preventing light from leaking to the thin film transistor, the gate line, and the data line by a color filter process, and a red, green, and blue sub-color filter for implementing color. (S103).

In this case, a first BM pattern, a second BM pattern, a third BM pattern, a fourth BM pattern, and a fifth BM are disposed in a predetermined region of the color filter substrate (ie, a region corresponding to the first bonding key formed on the array substrate). A second bonding key made of a pattern is formed.

As described above, the first BM pattern, the second BM pattern, the third BM pattern, the fourth BM pattern, and the fifth BM pattern of the second bonding key are formed together when forming the BM on the color filter substrate.

At this time, the fifth BM pattern has a dot shape of a 5x5 matrix so as to be located in a hole arranged in a 5x5 matrix of the fifth pattern, and the dot shape of the 5x5 matrix also corresponds to an inclination angle of the common electrode pattern. It is characterized by being inclined.

On the other hand, the color filter substrate and the array substrate are manufactured by partitioning a plurality of mother substrates each. In other words, a plurality of panel regions are defined in a large area mother substrate, and a thin film transistor or a color filter serving as a driving element is formed in each of the panel regions.

Subsequently, after the alignment film is printed on the color filter substrate and the array substrate, the alignment control force or the surface fixing force (that is, the pretilt angle and orientation) is applied to the liquid crystal molecules of the liquid crystal layer formed between the color filter substrate and the array substrate. Direction) to rub the alignment film (S102, S104).

As shown in FIGS. 8 and 9, the color filter substrate and the array substrate which have completed the rubbing process are inspected for defects of the alignment layer through the alignment layer inspector (S105).

As shown in FIG. 8, a spacer for maintaining a constant cell gap is formed on the array substrate after the alignment layer inspection, and a sealing material is coated on an outer portion of the color filter substrate. A pressure is applied and it adheres (S106, S107, S108). In this case, the spacer may be a ball spacer by a scattering method, or may be a column spacer by patterning.

In this case, the color filter substrate and the array substrate may be aligned by using the patterns of the first and second bonding keys.

That is, the gate wiring and the BM are aligned by aligning the first and second patterns of the first cemented key and the first and second BM patterns of the second cemented key, and the third pattern of the first cemented key. The data line and the BM are aligned by aligning the third BM pattern of the second bonding key.

In addition, the common electrode and the BM may be aligned by aligning the fifth pattern of the first bonding key and the fifth BM pattern of the second bonding key.

As described above, a plurality of panel regions are formed in a large area of the mother substrate, and a thin film transistor and a color filter layer serving as driving elements are formed in each of the panel regions. , Must be processed (S109).

Thereafter, the liquid crystal is injected into the liquid crystal display panel processed as described above through the liquid crystal inlet, and the liquid crystal inlet is encapsulated to form a liquid crystal layer. S111).

At this time, the injection of the liquid crystal uses a vacuum injection method using a pressure difference, the vacuum injection method is a container in which a liquid crystal is filled in a chamber in which a constant vacuum is set at a liquid crystal injection hole of a unit liquid crystal display panel separated from a large area mother substrate. The liquid crystal is filled into the liquid crystal display panel by injecting the liquid crystal into the liquid crystal display panel by the pressure difference between the inside and the outside of the liquid crystal display panel by dipping the liquid into a liquid. The liquid crystal layer of the liquid crystal display panel is formed. Therefore, when the liquid crystal layer is formed on the liquid crystal display panel through a vacuum injection method, a part of the failure turn should be opened to have a function of the liquid crystal injection hole.

Meanwhile, as shown in FIG. 9, in the case of using the dropping method, after completing the alignment layer inspection (S105), a predetermined failure turn is formed with a sealant on the color filter substrate and a liquid crystal layer is formed on the array substrate. (S106 ', S107').

The dropping method uses a dispenser to drop and dispense liquid crystals in an image display area of a large area of a first mother substrate on which a plurality of array substrates are arranged or a second mother substrate on which a plurality of color filter substrates are disposed. The liquid crystal layer is formed by uniformly distributing the liquid crystals to the entire image display area by the pressure for bonding the first and second mother substrates together.

Therefore, when the liquid crystal layer is formed on the liquid crystal display panel by dropping, the failure turn should be formed in a closed pattern surrounding the pixel area region to prevent the liquid crystal from leaking out of the image display region.

The dropping method can drop the liquid crystal in a short time compared to the vacuum injection method, and can form the liquid crystal layer very quickly even when the liquid crystal display panel is enlarged.

In addition, since only the required amount of liquid crystal is dropped on the substrate, the price competitiveness of the liquid crystal display panel due to the disposal of expensive liquid crystal, such as a vacuum injection method, is prevented, thereby enhancing the price competitiveness of the product.

Thereafter, the first mother substrate and the second mother substrate are bonded together by the sealing material by applying pressure while the liquid crystal is dropped and the first mother substrate and the second mother substrate coated with the sealing material are aligned as described above. The liquid crystal dropped by the application of pressure is spread evenly over the entire liquid crystal display panel (S108 ').

At this time, the bonding of the color filter substrate and the array substrate may be aligned using the patterns of the first and second bonding keys as described above.

By such a process, a plurality of liquid crystal display panels having a liquid crystal layer are formed on the first and second mother substrates having a large area, and the first and second mother substrates are processed and cut and separated into a plurality of liquid crystal display panels. By inspecting each liquid crystal display panel, a liquid crystal display device is manufactured (S109 ', S110').

In the fringe field type liquid crystal display device according to the embodiment of the present invention, an amorphous silicon thin film transistor using an amorphous silicon thin film as an active layer is described as an example. However, the present invention is not limited thereto, and the present invention is not limited thereto. The same applies to polycrystalline silicon thin film transistors using thin films.

In addition, the fringe field type liquid crystal display device according to an exemplary embodiment of the present invention has been described with an example in which a pixel electrode is formed at a lower portion and a common electrode is formed at an upper portion thereof, but the present invention is not limited thereto. It is also applicable to the case where a common electrode is formed and a pixel electrode is formed on the common electrode.

While a great many are described in the foregoing description, it should be construed as an example of preferred embodiments rather than limiting the scope of the invention. Therefore, the invention should not be construed as limited to the embodiments described, but should be determined by equivalents to the appended claims and the claims.

105: color filter substrate 110: array substrate
160,160a, 160b: Locking key
161a, 162a, 163a, 164a, 165a: pattern
161b, 162b, 163b, 164b, 165b: BM pattern

Claims (20)

Forming a thin film transistor, a pixel electrode, and a common electrode on the array substrate;
Forming a first bonding key having a plurality of patterns in the dummy region of the array substrate;
Forming a black matrix (BM) and a color filter on the color filter substrate;
Forming a second bonding key formed of a plurality of BM patterns in a dummy region of the color filter substrate;
And forming a panel by bonding the array substrate and the color filter substrate together, wherein the array substrate is formed using the BM pattern of the first bonding key and the second bonding key when the array substrate and the color filter substrate are bonded together. And a BM of the color filter substrate and the common electrode of the fringe field type liquid crystal display device. The fringe field type liquid crystal display device of claim 1, wherein the common electrode has a plurality of slits in the pixel region, and a pattern is formed such that a portion bent adjacent to the upper right side of the gate electrode is inclined diagonally. Way. 3. The method of claim 2, wherein the first bonding key comprises a first pattern, a second pattern, a third pattern, a fourth pattern, and a fifth pattern. 4. The fringe field type liquid crystal display of claim 3, wherein the first pattern and the second pattern are formed together when the gate wiring is formed, and the third pattern is formed together when the data wiring is formed. Manufacturing method. The method of claim 3, wherein the fourth pattern is a pattern for aligning column spacers, and the fifth pattern is formed together when forming a common electrode. The method of claim 5, wherein the fifth pattern has holes arranged in a matrix of 5 × 5 in a quadrangle, and the common electrode pattern of a portion bent adjacent to the upper right side of the gate electrode is inclined to correspond to an inclined angle. A fringe field type liquid crystal display device manufacturing method characterized by the above-mentioned. The method of claim 3, wherein the second engagement key comprises a first BM pattern, a second BM pattern, a third BM pattern, a fourth BM pattern, and a fifth BM pattern corresponding to the first engagement key. Method for manufacturing fringe field type liquid crystal display device. The fringe of claim 7, wherein the first BM pattern, the second BM pattern, the third BM pattern, the fourth BM pattern, and the fifth BM pattern are formed together when the BM is formed on the color filter substrate. Method of manufacturing field type liquid crystal display device. The method of claim 7, wherein the fifth BM pattern has a dot shape of a 5x5 matrix so as to be located in a hole arranged in a 5x5 matrix of the fifth pattern, and the dot shape of the 5x5 matrix is inclined to the common electrode pattern. A method of manufacturing a fringe field type liquid crystal display device, characterized in that it is formed to be inclined to match the angle of inversion. The method of claim 1, wherein the dummy region of the array substrate and the color filter substrate is positioned at corners of the array substrate and the color filter substrate on which no image is displayed. In the fringe field type liquid crystal display device, which is formed by combining an array substrate and a color filter substrate, and realizes an image by driving liquid crystal molecules through a fringe filed formed between a pixel electrode and a common electrode,
A first bonding key formed in the dummy region of the array substrate and having a plurality of patterns; And
A second bonding key formed in a dummy region of the color filter substrate and including a plurality of BM patterns, and the first bonding key pattern and the second bonding key BM pattern when the array substrate and the color filter substrate are bonded together; And aligning the common electrode of the array substrate and the BM of the color filter substrate using a fringe field type liquid crystal display. 12. The fringe field type liquid crystal display device according to claim 11, wherein the common electrode has a plurality of slits in the pixel area, and a pattern is formed such that a portion bent adjacent to the upper right side of the gate electrode is inclined diagonally. 13. The fringe field type liquid crystal display device according to claim 12, wherein the first bonding key comprises a first pattern, a second pattern, a third pattern, a fourth pattern, and a fifth pattern. 15. The fringe field type liquid crystal display of claim 13, wherein the first pattern and the second pattern are formed together when forming the gate wiring, and the third pattern is formed together when forming the data wiring. . The fringe field type liquid crystal display of claim 13, wherein the fourth pattern is a pattern for aligning column spacers, and the fifth pattern is formed together when forming a common electrode. The method of claim 15, wherein the fifth pattern has a hole arranged in a matrix of 5 × 5 in a quadrangle, and the common electrode pattern of a portion bent adjacent to the upper right side of the gate electrode is inclined to correspond to an inclined angle. A fringe field type liquid crystal display device, characterized in that. 15. The method of claim 13, wherein the second engagement key comprises a first BM pattern, a second BM pattern, a third BM pattern, a fourth BM pattern, and a fifth BM pattern corresponding to the first engagement key. Fringe field type liquid crystal display device. 18. The fringe of claim 17, wherein the first BM pattern, the second BM pattern, the third BM pattern, the fourth BM pattern, and the fifth BM pattern are formed together when forming the BM on the color filter substrate. Field type liquid crystal display device. 18. The method of claim 17, wherein the fifth BM pattern has a dot shape of a 5x5 matrix so as to be located in a hole disposed in a 5x5 matrix of the fifth pattern, and the dot shape of the 5x5 matrix is inclined to the common electrode pattern. A fringe field type liquid crystal display device which is inclined to correspond to the angle of inclination. 12. The fringe field type liquid crystal display device according to claim 11, wherein the dummy region of the array substrate and the color filter substrate is positioned at an edge of the array substrate and the color filter substrate on which no image is displayed.

Images