KR20150066011A - Liquid crystal display device and method of fabricating the same - Google Patents

Abstract

Provided is a liquid crystal display device. It includes a first substrate which has a display region which has a pixel region defined by the intersection of gate lines and data lines, a thin film transistor formed in each pixel region, and a pixel electrode connected to the thin film transistor, and a non-display region formed in the outside of the display region; a driving line which includes opening parts in the non-display region of the first substrate; a second substrate facing the first substrate; a reflection pattern which is overlapped with the driving line in the non-display region on the inside of the second substrate; a seal pattern which surrounds the display region between the driving lien and the reflection pattern and reacts with an UV ray to be harden; and a liquid crystal layer which is interposed between the first substrate and the second substrate.

Description

[0001] The present invention relates to a liquid crystal display device and a manufacturing method thereof,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of increasing the degree of curing of a seal pattern and implementing a narrow bezel, and a method of manufacturing the same.

Recently, as the information society has developed rapidly, there has been a need for a flat panel display having excellent characteristics such as thinning, light weight, and low power consumption.

Such flat panel display devices can be classified according to whether they emit light themselves or not. It is a light-emitting type display device that displays images by emitting light by itself, and displays images by using an external light source, It is called a display device.

Examples of the light-emitting display device include a plasma display panel, a field emission display, and an electro luminescence display. The light-receiving display device includes a liquid crystal display display).

Among these, liquid crystal display devices are excellent in resolution, color display, and image quality, and are actively applied to notebooks, desktop monitors, and TVs.

A liquid crystal display device is a liquid crystal display device in which two substrates on which electrodes are formed are arranged so that the surfaces on which the two electrodes are formed face each other and liquid crystal is injected between the two substrates, It is a device that expresses an image by moving a molecule to adjust the transmittance of light.

The liquid crystal display device includes a first substrate having a pixel electrode and a thin film transistor connected to each pixel region, a second substrate having a color filter layer for full color implementation, and a liquid crystal layer interposed between the two substrates. Respectively.

At this time, the liquid crystal display device is provided with a seal pattern along the rims of the first and second substrates to prevent leakage of the liquid crystal layer and to keep the first and second substrates in a joined state.

The seal pattern is made of a sealant and is cured when exposed to UV light.

Although the seal pattern is made of a thermosetting material that is cured by heat, it is hardly used in a liquid crystal display device in the case of a thermosetting seal pattern.

This is because if the heat treatment process for curing the seal pattern is performed in a state where the liquid crystal layer is resumed between the first and second substrates, the liquid crystal layer is deformed by heat to degrade the liquid crystal driving capability, or the liquid crystal layer itself Thereby causing the seal to break or the like.

Therefore, in order to prevent such a problem, a seal pattern using a UV-curable sealant is usually formed on a liquid crystal display device.

1 is a cross-sectional view of a portion of a conventional liquid crystal display device where a seal pattern is formed.

As shown in the figure, on the first substrate 10 of the non-display area NA outside the display area (not shown) for displaying an image in the conventional liquid crystal display device 1, A plurality of drive wirings 38 necessary for driving are provided, for example, common wirings for applying a common voltage, link wirings connected to gate wirings and data wirings, and the like.

In addition, a black matrix 73 is provided on the inner surface of the second substrate 70 in correspondence with the non-display area NA.

The seal pattern 95 overlaps the plurality of drive wirings 38 between the first and second substrates 10 and 70 and has a property of being cured in response to UV light. Respectively.

At this time, the driving wiring 38 is characterized in that a plurality of openings op are provided by patterning the wiring 38 itself so as to cure the seal pattern 95 located on the upper side by UV light irradiation.

In order to cure the seal pattern 95, UV light must be irradiated. Since the second substrate 70 is provided with the black matrix 73 for absorbing light, It is impossible to irradiate the pattern 95 with UV light. Therefore, the UV light must be irradiated to the seal pattern 95 through the rear surface of the first substrate 10. In this case, the driving wiring 38 is provided with a plurality of openings (op) are formed.

On the other hand, the seal pattern 95 to be cured by the UV light is cured by irradiating UV light having an appropriate wavelength for an appropriate period of time, and at least a portion for covering the UV light irradiated onto the seal pattern 95 38) must be 50% or less of the total area of the seal pattern 70, the UV light irradiated to the entire seal pattern 95 is uniformly reacted, and the seal pattern 95 is uniformly cured.

However, in the above-described conventional liquid crystal display device 1, on the first substrate 10, the non-display area NA where the seal pattern 95 is formed is used for driving the liquid crystal display device 1 A plurality of drive wirings 38 are formed. At this time, in order to smoothly drive the liquid crystal display device 1, these drive wirings 38 should have appropriate width and thickness in consideration of the internal resistance and the like.

In order to uniformly cure the seal pattern 95 by irradiating the seal pattern 95 overlapping with the drive wiring 38 with UV light, the opening (not shown) provided in the drive wiring 38 the width of the driving wiring 38 is widened as a whole and the width of the driving wiring 38 is increased in order to satisfy the required internal resistance. The area of the provided opening (op) must also be widened.

However, when the width of the drive wiring 38 is widened as described above, the width of the non-display area NA is increased, and a narrow bezel and a lightweight thin type which are trends of recent display devices can not be realized.

According to an aspect of the present invention, there is provided a method of manufacturing a semiconductor device, the method comprising: And a liquid crystal display device capable of realizing a narrow bezel.

According to an aspect of the present invention, there is provided a liquid crystal display device including a plurality of gate lines and a plurality of data lines intersecting each other to define pixel regions, A first substrate having a display region formed with pixel electrodes connected to the thin film transistor and a non-display region outside the display region; A driving wiring formed with the plurality of openings in the non-display region on the first substrate; A second substrate facing the first substrate; A reflective pattern formed on the inner surface of the second substrate to overlap the driving wiring in the non-display area; A seal pattern formed to surround the display region between the driving wiring and the reflection pattern and cured in response to UV light; And a liquid crystal layer interposed in a display region between the first substrate and the second substrate.

A plurality of conductive balls may be provided in the seal pattern. At this time, the conductive balls contact the driving wiring and the reflection pattern at the same time, thereby conducting the driving wiring and the reflection pattern.

The reflective pattern is characterized in that its surface has a concavo-convex structure, and the convexo-concaves are irregular.

Further, the reflective pattern has a width larger than the width of the seal pattern. Further, the reflective pattern is formed of aluminum (Al) or silver (Ag), which is a metal material having excellent reflectance.

Meanwhile, in the display region of the second substrate, a first black matrix is provided at the boundary of each pixel region, and color filter patterns of red, green, and blue are sequentially repeated in the display region of the second substrate And a second black matrix is provided on the non-display region of the second substrate.

At this time, an overcoat layer is further formed on the display region, the display region, and the non-display region to cover the color filter layer. When the overcoat layer is formed only on the display region, And when the overcoat layer is formed on the non-display area, the overcoat layer is formed on the overcoat layer.

On the other hand, the reflection pattern may be formed by connecting a plurality of reflection patterns, each of which has a non-continuous 'ㅁ' shape, four bars separated from each other to form a 'ㅁ' shape, A first portion of a 'A' shape or a rotated 'a' shape having a first portion and a second portion of a bar shape corresponding to an opening of the first portion, And has a second portion of an 'a' shape, and has a shape of 'ㅁ' shape.

The common electrode is formed on the first substrate so as to alternate with the pixel electrode in the same layer as the pixel electrode, or in a form of overlapping the pixel electrode with the pixel electrode and the insulating layer.

A method of manufacturing a liquid crystal display device according to an embodiment of the present invention is a method of manufacturing a liquid crystal display device including a gate and a data line intersecting each other on a display region having a plurality of pixel regions and a non- Forming a thin film transistor connected to the gate and the data line in each of the pixel regions and a pixel electrode connected to the thin film transistor and forming a driving wiring having a plurality of openings in the non-display region; Forming a reflection pattern corresponding to the non-display area of the inner surface of the second substrate facing the first substrate; Forming a seal pattern that is cured in response to UV light so as to be positioned between the driving wiring and the reflection pattern on one of the first and second substrates; Attaching the first and second substrates to each other through a liquid crystal layer in a display region between the first and second substrates; And irradiating UV light onto the non-display area with the back surface of the first substrate to cure the seal pattern.

At this time, a plurality of conductive balls are provided in the seal pattern, and the bonding is performed such that the conductive balls contact the driving wiring and the reflection pattern at the same time, thereby conducting the driving wiring and the reflection pattern.

Further, the reflective pattern is characterized in that its surface is formed to have a concavo-convex structure, wherein the convexo-concave structure is preferably formed in an irregular shape.

And the reflective pattern is formed to have a larger width than the width of the seal pattern.

Forming a first black matrix at the boundary of each pixel region in the display region of the second substrate and simultaneously forming a second black matrix in the non-display region of the second substrate;

Forming a color filter layer in the display area of the second substrate such that red, green, and blue color filter patterns are sequentially repeated in the pixel area within an area surrounded by the first black matrix; And forming an overcoat layer covering the color filter layer, wherein the reflective pattern is formed on the second black matrix exposed to the outside of the overcoat layer, or is formed on the overcoat layer.

In addition, the reflection pattern may be formed in a shape of 'ㅁ', a shape in which four bars are separated from each other to form a 'ㅁ' shape, a shape of a 'c' And a second portion of a bar shape corresponding to the opening of the first portion, a first portion of the 'a' shape or a rotated 'a' shape, and a first portion of a ' And a second portion having a 'C' shape, and has a shape of 'ㅁ' shape.

The common electrode is formed on the first substrate so as to alternate with the pixel electrode in the same layer as the pixel electrode or over the pixel electrode via the pixel electrode and the insulating layer.

As described above, in the liquid crystal display device according to the first embodiment of the present invention, the UV light passes through the opening of the driving wiring through the seal pattern portion overlapping the UV light, And the light passing through the seal pattern is reflected by the reflection pattern and is again incident on the seal pattern, so that the seal pattern is secondarily irradiated onto the seal pattern.

Accordingly, the seal pattern expands the area exposed to UV light compared to a conventional liquid crystal display device having no reflection pattern, and at the same time, the irradiation amount increases, thereby improving the degree of curing of the seal pattern and shortening the UV light irradiation time .

Further, the liquid crystal display according to the second embodiment of the present invention scatters the UV light incident on the seal pattern by the plurality of conductive balls provided in the seal pattern, so that the UV light spreads to the surroundings within the seal pattern Further, by varying the incident angle of the UV light incident on the reflection pattern, the light reflected by the reflection pattern is also reflected at various angles.

Therefore, in the case of the liquid crystal display device according to the second embodiment of the present invention due to the role of the conductive balls, all of the portions covered by the drive wiring in addition to the openings of the drive wiring can be exposed to UV light, And the curing time can also be shortened.

Further, when the first and second substrates are attached together, the conductive balls contact the driving wiring and the reflection pattern at the same time, thereby making the two components conductive, so that the reflection pattern itself becomes a component of the driving wiring .

Therefore, in this case, since the area of the driving wiring is enlarged and the internal resistance is reduced, when the driving wiring is formed to have the same internal resistance as the driving wiring of the conventional liquid crystal display device, the width of the driving wiring can be relatively reduced. The width of the non-display region for forming the drive wiring can be reduced, thereby realizing the narrow bezel.

In the liquid crystal display device according to the modification of the first and second embodiments of the present invention, the surface of the reflection pattern has an irregular concavo-convex structure and is incident on the seal pattern through the opening of the drive wiring, The UV light reaching the reflection pattern is irregularly reflected to be exposed to the reflected UV light up to the portion hidden by the drive wiring among the seal patterns. Therefore, the degree of curing of the seal pattern is further improved and the amount of UV light is increased, It has the effect of shortening the time.

1 is a cross-sectional view of a portion of a conventional liquid crystal display device where a seal pattern is formed.
2 is a schematic plan view of a liquid crystal display according to an embodiment of the present invention.
Fig. 3 is a cross-sectional view of a portion cut along the cutting line III-III of Fig. 2; Fig.
FIG. 4 is a cross-sectional view of a portion cut along the line IV-IV of FIG. 2; FIG.
5A to 5D are diagrams showing various plan views of reflection patterns provided on the second substrate in the liquid crystal display device according to the first embodiment of the present invention.
6 is a cross-sectional view of a part of a non-display region of a liquid crystal display device according to a modification of the first embodiment of the present invention.
FIG. 7 is a cross-sectional view of a portion of a non-display region of the liquid crystal display device according to a second embodiment of the present invention, and is the same as that shown in FIG. 4. FIG.
8 is a cross-sectional view of a portion of a non-display region of a liquid crystal display device according to a second embodiment of the present invention, and is the same as that shown in FIG.
FIGS. 9A to 9G are cross-sectional views illustrating a pixel region of a liquid crystal display device according to a second embodiment of the present invention; FIG.
10A to 10G are cross-sectional views illustrating a manufacturing process of a part of a non-display region provided with a reflection pattern in a liquid crystal display device according to a second embodiment of the present invention.

Hereinafter, preferred embodiments according to the present invention will be described with reference to the accompanying drawings.

2 is a cross-sectional view taken along line III-III of FIG. 2, and FIG. 4 is a cross-sectional view taken along line IV- Sectional view taken along line IV-IV in Fig.

As shown in the drawing, the liquid crystal display device 101 according to the first embodiment of the present invention defines a display area AA for displaying an image and a non-display area NA outside thereof.

The liquid crystal display device 101 includes a first substrate 110 having a pixel electrode 150, a thin film transistor Tr, gate and data lines 112 and 130 and a driving line 138, And a liquid crystal layer 190 interposed between the first and second substrates 110 and 170. The second substrate 170 includes a liquid crystal layer 190 interposed therebetween.

At this time, a common electrode 153 is further formed on the first or second substrate 110 or 170.

The liquid crystal display device 101 may have various driving methods depending on the arrangement of the pixel electrode 150 and the common electrode 153. In the first embodiment of the present invention, the pixel electrode 150 and the common electrode 153 ) Are all provided on the first substrate 110. In the example shown in FIG.

 The display area AA includes a plurality of gate wirings 112 and data wirings 130 which intersect with each other to define a pixel area P in the display area AA of the first substrate 110 And each pixel region P is connected to the gate wiring 112 and the data wiring 130 and includes a thin film transistor Tr.

The thin film transistor Tr includes a gate electrode 115, a gate insulating film 116, an active layer 120a of pure amorphous silicon, and an impurity amorphous silicon sequentially from the first substrate 110, The source and drain electrodes 133 and 136 are in contact with the semiconductor layer 120 of the contact layer 120b and the ohmic contact layer 120b, respectively.

In this case, when the semiconductor layer 120 and the source and drain electrodes 133 and 136 are formed by a single mask process in the manufacture of the thin film transistor Tr having such a structure, The driving wiring 138 formed on the same layer as the semiconductor layer 130 has the same structure as the semiconductor layer 120 provided below the source and drain electrodes 133 and 136, And a second dummy pattern 121b made of an impurity amorphous silicon is formed on the dummy semiconductor patterns 121a and 121a.

However, the dummy semiconductor pattern 121 may be omitted when the semiconductor layer 120 and the source and drain electrodes 133 and 136 are processed through different mask processes.

Meanwhile, the thin film transistor Tr has a bottom gate structure as an example, and the thin film transistor Tr can also be variously modified.

For example, instead of the semiconductor layer 120 formed of the amorphous silicon, an oxide semiconductor layer of a single layer structure made of an oxide semiconductor material is provided and includes a gate electrode, a gate insulating film, an oxide semiconductor layer, an etch stopper, And may have a stacked structure of source and drain electrodes.

Further, the thin film transistor Tr includes an interlayer insulating film having a semiconductor layer of polysilicon and including a semiconductor layer of polysilicon, a gate insulating film, a gate electrode, and a semiconductor layer contact hole, And may have a stacked structure of source and drain electrodes which are in contact with the semiconductor layers of the polysilicon and are spaced apart from each other, thereby forming a top gate structure.

The pixel electrode 150 is connected to the drain electrode 136 of the thin film transistor Tr in each pixel region P on the first substrate 110, And the common electrode 153 is formed alternately.

At this time, the common electrode 114 is further formed in the display area AA on the first substrate 110 so as to be spaced apart from the respective gate lines 112 , The common wiring 114 and the common electrode 153 provided in each pixel region P are electrically connected to each other.

In this case, the common electrode 153 may be provided on the second substrate 170. In this case, the common wiring 114 provided in the display area AA of the first substrate 110 is omitted.

A color filter layer 176 in which red, green and blue color filter patterns 176a and 176b (not shown) are sequentially repeated for each pixel region P is formed in the display area AA of the second substrate 170 And a first black matrix 173 is provided at the boundary of each pixel region P in the display region AA to suppress light leakage at a boundary between the pixel regions P, In the non-display area NA outside the display area AA, a second black matrix 174 is formed with the display area AA as a frame.

And an overcoat layer 180 covering the color filter layer 176 and having a flat surface.

A plurality of gate pads (not shown) and data pads (not shown) are formed on the non-display area NA of the first substrate 110 to be connected to an external circuit. Are connected to one end of the gate wiring 112 and the data wiring 130 through a link wiring (not shown), respectively.

A plurality of driving wirings 138 are provided on the first substrate 110 of the non-display area NA. At this time, the driving wiring 138 may be either a common wiring for applying a common voltage, a gate off (off) voltage, a V _gl wiring for applying a voltage V _gl , which is a voltage for driving a storage capacitor, .

Further, a seal pattern 195 (see FIG. 1) made of a sealant having a property of being superposed on the drive wiring 138 and curing in response to UV light is formed in the non-display area NA between the first substrate 110 and the second substrate 170 Are formed.

At this time, the drive wiring 138 overlapping the seal pattern 195 is characterized by having a plurality of openings op. This is to irradiate the UV light irradiated through the bottom surface of the first substrate 110 with the seal pattern 195.

 In a non-display area NA of the second substrate 170, an area overlapping with the seal pattern 195 is formed as a most characteristic structure in the liquid crystal display device according to an embodiment of the present invention. The reflective pattern 185 is formed of a metal material having a width larger than that of the pattern 195 and having excellent reflectance, for example, aluminum (Al) or silver (Ag).

The reflective pattern 185 is formed to cover the second black matrix 174, that is, the uppermost one of the constituent elements of the second substrate 170.

Since the reflective pattern 185 is provided in the non-display area NA of the second substrate 170 so as to overlap with the seal pattern 195, the UV light incident from the back surface of the first substrate 110 is reflected So that the seal pattern 195 is incident on the portion where the seal pattern 195 is located.

Therefore, in the liquid crystal display device according to the embodiment of the present invention, the UV light having passed through each of the plurality of openings op of the driving wiring 138 is reflected by the reflection pattern 185 and then reflected by the seal pattern 195 So that the curing of the seal pattern 195 relative to the conventional liquid crystal display device (1 in Fig. 1) is further promoted, so that the UV light irradiation time is shortened.

In addition, in the liquid crystal display device according to the embodiment of the present invention, the light reflected by the reflection pattern 185 is reflected by the seal pattern 195 (see FIG. 1) of the portion overlapping the drive wiring 138 other than the region corresponding to the opening op The seal pattern 195 is uniformly cured relative to the conventional liquid crystal display device 1 (see FIG. 1) by the increase of the area of the seal pattern 195 irradiated with the UV light.

Further, when the drive wiring 138 is formed so as to have the same opening (op) area with respect to the drive wiring 138, the degree of curing by the UV light of the seal pattern 195 is increased, The area of the opening op provided in the driving wiring 138 can be reduced when the sealing pattern 195 having the same level of hardness as the 1)

In this case, since the area of the actual driving wiring 138 increases as the area of the opening op decreases, the width of the driving wiring 138 can be reduced, thereby reducing the width of the non-display area NA So it has the effect of implementing a narrow bezel.

5A to 5D are views showing various plan views of reflection patterns provided on the second substrate in the liquid crystal display according to the first embodiment of the present invention.

As shown in the figure, the reflection pattern 185 provided on the non-display area NA on the second substrate 170 may take various forms.

That is, as shown in FIG. 5A, the reflection pattern 185 may have a shape of 'ㅁ' to border the display area AA without interruption, or may have a shape of ' 185 may have a shape of 'ㅁ' as a whole, and may have a predetermined spacing distance from each side of the second substrate (not shown) so that four bars are spaced apart from each other.

5C, the reflection pattern 185 may include a first portion of a 'C' shape or a rotated 'C' shape and a second portion of a bar shape apart from the first portion. As shown in FIG. 5D, the reflection pattern 185 may include a first portion of a 'A' character or a rotated 'a' and a second portion of a 'b' And the reflection pattern 185 may be formed in various shapes other than the above-described planar shape.

7 and 8) according to the second embodiment of the present invention to be described later and a modified example thereof, it is preferable that the reflection pattern 185 has various planar shapes, 7 and Fig. 8), the driving wiring 138 provided in the driving circuit 110 is electrically conducted via the conductive ball (196 in Fig. 7 and Fig. 8).

The driving wiring 138 may be formed to be connected to all the side surfaces of the non-display area NA, but it may be a different wiring (for example, common wiring and link wiring) for each side. In this case, 185 form a short-circuited configuration, a short between the different drive wiring 138 (for example, a common wiring and a link wiring) is generated.

Therefore, in order to prevent short-circuiting between the different driving wirings 138, the reflection pattern 185 may be formed in various shapes as described above without being necessarily connected.

4, the reflective pattern 185 provided on the second substrate 170 has a flat surface in the liquid crystal display device 101 according to the first embodiment of the present invention 6 (a cross-sectional view of a part of the non-display region of the liquid crystal display device according to the modification of the first embodiment of the present invention) as a modification thereof, the surface of the reflection pattern 185 is more precisely the seal pattern 195 Is used to reflect ultraviolet light incident through the backside of the first substrate 110 to thereby maximize the role of entering the seal pattern 195. In other words, in order to induce diffuse reflection, irregular It is characterized by having a concave and convex shape.

When irregular irregularities are formed on the surface of the reflection pattern 185, the UV light transmitted through the seal pattern 195 and incident on the surface of the reflection pattern 185 is reflected in various directions without adjusting an incident angle The liquid crystal display device 102 according to the modified example of the first embodiment of the present invention is arranged such that the reflection pattern 185 has a flat surface compared with the liquid crystal display device 101 of the first embodiment of the present invention The reflected UV light can be irradiated to the area of the seal pattern 195 in which the UV light directly irradiated is shielded by the drive wiring 138 efficiently.

Other components except for the reflection pattern 185 in the liquid crystal display device 102 according to the modified example of the first embodiment of the present invention are the liquid crystal display device according to the first embodiment of the present invention ), And therefore the following description is omitted.

7 is a cross-sectional view of a portion of the non-display region of the liquid crystal display device according to the second embodiment of the present invention, and is the same as that shown in FIG. The liquid crystal display device 201 according to the second embodiment of the present invention has the same reference numerals as those of the liquid crystal display device according to the first embodiment, 100 " for the sake of distinction with < / RTI >

In the case of the liquid crystal display device 201 according to the second embodiment of the present invention, all components except the seal pattern 195 are formed in the liquid crystal display device according to the first embodiment 4). Therefore, only the configuration having a difference point will be described.

The liquid crystal display device 201 according to the second embodiment of the present invention is different from the liquid crystal display device 101 according to the first embodiment (101 in Fig. 4) in that a plurality of conductive balls 196 Is provided.

When the UV light is incident from the back surface of the first substrate 110, the conductive ball 196 scatters the UV light inside the seal pattern 195 so that the UV light is spread well inside the seal pattern 195. And reaches the area of the seal pattern 195 located at the portion covered with the drive wiring 138. [

The conductive balls 196 scatter the UV light incident into the seal pattern 195 to change the incident angle of the UV light to pass through the seal pattern 195 and reflect the UV light reaching the reflection pattern 185 And changes the incident angle so as to be reflected in various directions by the incident angle change.

The UV light reflected in various directions by the reflection pattern 185 is incident on a portion covered by the drive wiring 138, thereby inducing uniform curing of the seal pattern 195.

The conductive balls 196 are pressed against the first substrate 110 and the second substrate 170 after the seal pattern 195 is formed, The wiring 138 and the reflection pattern 185 provided on the second substrate 170 are simultaneously brought into contact with each other so that the two components 138 and 185 are electrically connected to each other.

In this case, since the reflective pattern 185 is a component of the driving wiring 138, the internal resistance of the driving wiring 138 is reduced. Therefore, the driving wiring 138 is formed to have the same resistance per unit area It is possible to reduce the width of the driving wiring 138 compared to the conventional liquid crystal display device, and finally, the width of the non-display area NA can be reduced to realize a narrow bezel.

All components except for the conductive balls 196 are the same as those of the liquid crystal display (101 of FIG. 4) according to the first embodiment of the present invention, and therefore, description thereof will be omitted.

As a modification of the second embodiment of the present invention, FIG. 8 (a cross-sectional view of the same portion shown in FIG. 4 as a cross-sectional view of a part of a non-display region of a liquid crystal display device according to a second embodiment of the present invention) (196) can be applied to a liquid crystal display (102 of FIG. 6) according to a modification of the first embodiment of the present invention.

That is, a plurality of conductive balls 196 may be provided in the seal pattern 195 in addition to the reflection pattern 185 having a concave-convex structure on the surface facing the seal pattern 195.

In the liquid crystal display device 202 according to the modification of the second embodiment of the present invention, both the scattering characteristics of the conductive balls 196 and the diffuse reflection characteristics of the reflection surface 185 itself are realized, A larger area of the seal pattern 195 than the liquid crystal display device according to the embodiment can be exposed to the UV light, thereby reducing the UV light irradiation time and inducing the uniform curing characteristics of the seal pattern 195.

Hereinafter, a method of manufacturing the liquid crystal display (201 of FIG. 7) according to the second embodiment of the present invention having the above-described structure will be briefly described. 7) in which the color filter layer (176 in FIG. 7) is provided, the method of manufacturing the second substrate (170 in FIG. 7) and the manufacturing method of the first and second substrates A step of attaching the second substrate (110, 170 in Fig. 7) is mainly described. The liquid crystal display (101 of FIG. 4) according to the first embodiment of the present invention is all included in the manufacturing method of the liquid crystal display (201 of FIG. 7) according to the second embodiment and therefore will not be described.

FIGS. 9A to 9G are cross-sectional views illustrating a process of manufacturing one pixel region of a liquid crystal display device according to a second exemplary embodiment of the present invention, and FIGS. 10A to 10G are cross-sectional views of a liquid crystal display device according to a second exemplary embodiment of the present invention, Sectional view of a part of a non-display region provided with a reflection pattern.

First, as shown in FIGS. 9A and 10A, on a first substrate 110 made of a transparent insulating material, for example, glass or plastic, a gate defining a pixel region P intersecting each other by a general method and A data line (not shown) 130 is formed and a thin film transistor Tr connected to the gate and data lines (not shown) is formed in each pixel region P. At this time, the thin film transistor Tr may be formed to have various lamination shapes as described above.

In the step of forming the gate wiring (not shown) or the data wiring 130, the driving wiring 138 is formed in the non-display area NA. In the drawing, the driving wiring 138 is formed on the same layer as the data wiring 130, for example.

The drive wiring 138 may be a common wiring, a Vgl wiring, and a link wiring, for example. At this time, in the region where the drive wiring 138 overlaps with the seal pattern 195 formed later, (op) is provided.

The pixel electrode 150 which is in contact with the drain electrode 136 of the thin film transistor Tr and the common electrode 153 alternating with the pixel electrode 150 are formed for each pixel region P as shown in Figs. 9B and 10B Thereby completing the first substrate 110.

In this case, the common electrode 153 may be formed as an upper portion of the insulating layer via an insulating layer over the pixel electrode 150. In this case, the pixel electrode 150 and the common electrode 153 are positioned And a bar-shaped opening is formed in the common electrode 153 (or the pixel electrode 150) located on the insulating layer.

As shown in the figure, when the pixel electrode 150 and the common electrode 153 alternate with each other, a transverse electric field type liquid crystal display device is formed. Although not shown, the pixel electrode and the common electrode A fringe field switching mode liquid crystal display device is formed.

In the drawing, the pixel electrode 150 and the common electrode 153 are alternately formed in each pixel region P as an example. At this time, a protective layer 140 is formed between the pixel electrode 150 and the thin film transistor Tr, and a drain contact 136 exposing the drain electrode 136 of the thin film transistor Tr to the protective layer 140 A pixel electrode 150 is formed on the passivation layer 140 to be in contact with the drain electrode 136 through the drain contact hole 143 and the pixel electrode 150 is formed on the passivation layer 140, And the common electrode 153 electrically connected to the common wiring (not shown) is formed.

Next, as shown in FIGS. 9C and 10C, a black resin or the like is coated on a second substrate 170 made of a transparent insulating material, for example, glass or a plastic material, and patterned, so that in the display area AA, A first black matrix 173 is formed on the boundary of the pixel region P and a second black matrix 174 is formed on the non-display region NA to surround the display region AA.

Next, as shown in FIGS. 9D and 10D, a red resist is applied to the display area AA on the first and second black matrices 173 and 174, A red color filter pattern 176a is formed and a green and blue color filter pattern 176b (not shown) is formed for another two pixel regions P adjacent to the one pixel region P in the same manner A color filter layer 176 is formed in such a manner that red, green and blue color filter patterns 176a and 176b (not shown) are repeated in the display area AA in this order.

Next, an overcoat layer 180 having a flat surface with respect to the display area AA is formed on the color filter layer 176 as shown in Figs. 9E and 10E. At this time, the overcoat layer 180 may be formed to cover the second black matrix 174 provided in the non-display area NA.

Next, as shown in FIGS. 9F and 10F, a metal material (not shown) having a high reflectance over the second black matrix 174 in the non-display area NA of the second substrate 170 on which the overcoat layer 180 is formed, For example, aluminum (Al) or silver (Ag) is deposited and patterned to form a reflective pattern 185 having any one of various shapes as described with reference to FIGS. 5A to 5D, .

The reflective pattern 185 is formed to be smaller than the width of the second black matrix 174 provided in the non-display area NA and to have a width larger than the width of the seal pattern 195 formed later .

Meanwhile, in the case of the liquid crystal display (102 of FIG. 6 and 202 of FIG. 8) according to the modification of the first or second embodiment of the present invention, the surface of the reflection pattern 185 has a concavo- (Not shown) irregularly with respect to the reflection pattern 185 after the reflection pattern 185 is formed as described above in the case of providing a concave-convex structure on the surface of the reflection pattern 185, , A portion of the photoresist pattern (not shown) exposed to the outside is partially etched, and then the photoresist pattern (not shown) is removed to form a reflective pattern 185 having a concavo-convex structure.

Alternatively, in the step of forming the second black matrix 174 or the overcoat layer 180, a mask including an exposure process by selectively controlling the amount of light transmission using an exposure mask (not shown) The surface of the portion formed in the non-display area NA is made to have a concavo-convex structure, and then the above-described reflective pattern 185 is formed on the surface of the reflective pattern 185 to have a concave- .

Although not shown in the drawings, in the method of manufacturing the substrate of either the first substrate 110 or the second substrate 170, a method of manufacturing the substrate in the display area AA is employed, And further forming a patterned spacer (not shown) having a columnar shape.

The patterned spacers (not shown) maintain the spacing between the first and second substrates 110 and 170, that is, the spacing between the liquid crystal layer 190 (FIG. 7).

9G and 10G, the first substrate 110 and the second substrate 170 manufactured as described above are positioned so that the overcoat layer 180 and the pixel electrode 150 face each other. The non-display area NA is squeezed with respect to the substrate (the first substrate 110 in the drawing) of either the first substrate 110 or the second substrate 170, A seal pattern 195 is formed in such a manner that a sealant having the property of being cured in response to UV light through printing is enclosed in the display area AA.

In the drawing, for example, a seal pattern 195 is formed on the non-display area NA of the first substrate 110.

In the liquid crystal display device 201 according to the second embodiment of the present invention, a plurality of conductive balls 196 are mixed in the sealant to form a plurality of seal patterns 195 in the non-display area NA. The conductive ball 196 is included.

In the case of the liquid crystal display (101 of FIG. 4) according to the first embodiment of the present invention, the seal pattern 195 does not include the conductive balls 196.

Next, as shown in FIGS. 9H and 10H, an appropriate amount of liquid crystal is dropped onto the display area AA of the first substrate 110 on which the seal pattern 195 is formed, And the second substrate 170 are bonded together. The liquid crystal layer 190 is formed in the display area by the progress of the adhesion process.

Next, as shown in FIGS. 9I and 10I, the first and second substrates 110 and 170 are bonded to the non-display area NA through the rear surface of the first substrate 110 And the seal pattern 195 is exposed to UV light by curing the seal pattern 195 by irradiating UV light, thereby completing the liquid crystal display device 201 according to the second embodiment of the present invention.

In the case of the liquid crystal display device 201 according to the second embodiment of the present invention, the UV light is reflected by the reflection pattern 185 provided on the second substrate 170, op passes through a portion of the seal pattern 195 which overlaps with the seal pattern 195 and is primarily irradiated onto the seal pattern 195. Light passing through the seal pattern 195 is reflected by the reflection pattern 185 And is again incident on the seal pattern 195, so that the seal pattern 195 is irradiated secondarily.

Therefore, the seal pattern 195 expands the area exposed to the UV light compared to the conventional liquid crystal display device (1 of FIG. 1) without the reflective pattern 185, and at the same time, Thereby improving the degree of curing.

The liquid crystal display device 201 according to the second embodiment of the present invention scatters UV light incident on the seal pattern 195 by a plurality of conductive balls 196 provided in the seal pattern 195, The light reflected by the reflection pattern 185 is also reflected at various angles by varying the angle of incidence of the UV light incident on the reflection pattern 185. In addition, .

In the case of the liquid crystal display device 201 according to the second embodiment of the present invention due to the role of the conductive balls 196, Can be exposed to the UV light. Therefore, the curing degree of the seal pattern 195 can be further improved and the curing time can be further shortened.

The conductive balls 196 simultaneously contact the driving wiring 138 and the reflection pattern 185 when the first and second substrates 110 and 170 are attached to each other to form the two components 138 and 185 And the reflective pattern 185 itself becomes a component of the driving wiring 138 by making it conductive.

Therefore, in this case, the area of the driving wiring 138 is enlarged, and the internal resistance is reduced. Therefore, the same internal resistance as the driving wiring (38 in FIG. 1) provided in the conventional liquid crystal display The width of the non-display area NA for forming the driving wiring 138 can be reduced, thereby realizing the narrow bezel.

The present invention is not limited to the above-described embodiments and modifications, and various changes and modifications can be made without departing from the spirit of the present invention.

101: liquid crystal display
110: first substrate
116: gate insulating film
121: dummy semiconductor pattern
121a and 121b: first and second dummy patterns
138: drive wiring
170: second substrate
174: Second Black Matrix
185: reflection pattern
195: Seal pattern
NA: non-display area

Claims (19)

A pixel region is defined by a plurality of gate wirings and a plurality of data wirings intersecting with each other and a display region in which a thin film transistor and a pixel electrode connected to the thin film transistor are formed for each of the plurality of pixel regions and a non- A first substrate;
A driving wiring formed with the plurality of openings in the non-display region on the first substrate;
A second substrate facing the first substrate;
A reflective pattern formed on the inner surface of the second substrate to overlap the driving wiring in the non-display area;
A seal pattern formed to surround the display region between the driving wiring and the reflection pattern and cured in response to UV light;
A liquid crystal layer interposed in a display region between the first substrate and the second substrate;
And the liquid crystal display device.
The method according to claim 1,
And a plurality of conductive balls are provided in the seal pattern.
3. The method of claim 2,
Wherein the conductive balls contact the driving wiring and the reflection pattern at the same time to make the driving wiring and the reflection pattern conductive.
3. The method according to claim 1 or 2,
Wherein the reflective pattern has a concavo-convex structure on the surface thereof.
5. The method of claim 4,
And the irregularities are irregular.
3. The method according to claim 1 or 2,
And the reflective pattern has a width larger than a width of the seal pattern.
3. The method according to claim 1 or 2,
Wherein the reflective pattern is made of aluminum (Al) or silver (Ag), which is a metal material having excellent reflectance.
3. The method according to claim 1 or 2,
Wherein a first black matrix is provided at the boundary of each pixel region in the display region of the second substrate and a color filter pattern of red, green, and blue is sequentially repeated in the display region of the second substrate And a second black matrix is provided in a non-display region of the second substrate.
9. The method of claim 8,
An overcoat layer is further formed on the display region or the display region and the non-display region to cover the color filter layer,
Wherein the reflective pattern is formed on the second black matrix when the overcoat layer is formed only on the display area and is formed on the overcoat layer when the overcoat layer is formed on the non-display area.
3. The method according to claim 1 or 2,
The reflection pattern
A seamlessly connected 'ㅁ' form,
Four bars are separated from each other to form a "ㅁ" shape,
Shaped second portion that is separated from the first portion of the first portion by an opening corresponding to the opening of the first portion,
A first part of the 'a' character or a rotated 'a' shape, and a second part of the 'b' character or the rotated 'b' character shape, And the liquid crystal display device.
3. The method according to claim 1 or 2,
Wherein the common electrode is formed on the first substrate so as to be alternated with the pixel electrode in the same layer as the pixel electrode or in a form of overlapping with the pixel electrode via the pixel electrode and the insulating layer.
A gate and a data line crossing each other in a display region provided with a plurality of pixel regions and a display region on a first substrate on which a non-display region is defined outside the gate line and the data line; Forming a pixel electrode connected to the thin film transistor, and forming a driving wiring having a plurality of openings in the non-display region;
Forming a reflection pattern corresponding to the non-display area of the inner surface of the second substrate facing the first substrate;
Forming a seal pattern that is cured in response to UV light so as to be positioned between the driving wiring and the reflection pattern on one of the first and second substrates;
Attaching the first and second substrates to each other through a liquid crystal layer in a display region between the first and second substrates;
And curing the seal pattern by irradiating UV light to the non-display area on the back surface of the first substrate
And the second electrode is electrically connected to the second electrode.
13. The method of claim 12,
Wherein a plurality of conductive balls are provided in the seal pattern and the conductive balls are brought into contact with the driving wiring and the reflection pattern at the same time so that the driving wiring and the reflection pattern are electrically connected to each other. Way.
The method according to claim 12 or 13,
Wherein the reflective pattern is formed so that its surface has a concavo-convex structure.
15. The method of claim 14,
Wherein the convexo-concave structure is formed in an irregular shape.
The method according to claim 12 or 13,
Wherein the reflective pattern is formed to have a larger width than the width of the seal pattern.
The method according to claim 12 or 13,
Forming a first black matrix in a boundary of each pixel region in a display region of the second substrate and simultaneously forming a second black matrix in a non-display region of the second substrate;
Forming a color filter layer in the display area of the second substrate such that red, green, and blue color filter patterns are sequentially repeated in the pixel area within an area surrounded by the first black matrix;
Forming an overcoat layer covering the color filter layer,
Wherein the reflective pattern is formed on the second black matrix exposed to the outside of the overcoat layer or on the overcoat layer.
The method according to claim 12 or 13,
The reflection pattern
A seamlessly connected 'ㅁ' form,
Four bars are separated from each other to form a "ㅁ" shape,
Shaped second portion that is separated from the first portion of the first portion by an opening corresponding to the opening of the first portion,
A first part of the 'a' character or a rotated 'a' shape, and a second part of the 'b' character or the rotated 'b' character shape, Wherein the liquid crystal display device is a liquid crystal display device.
The method according to claim 12 or 13,
Wherein a common electrode is further formed on the first substrate so as to overlap with the pixel electrode in the same layer as the pixel electrode or to overlap the pixel electrode with the pixel electrode and an insulating layer interposed therebetween Gt;

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