KR20130102864A - Narrow bezel type liquid crystal display device - Google Patents

Abstract

PURPOSE: A narrow bezel type liquid crystal display device is provided to improve display quality by linearly overlapping an edge black matrix with the outermost pixel line of a display region. CONSTITUTION: An edge black matrix (183) is formed in the non-display region (NA) of the inner surface of a second substrate. The edge black matrix surrounds a displaying region (AA). The edge black matrix is overlapped with pixel regions. The pixel region is formed in an outermost part within the displaying region. The width of the region overlapped with the outermost pixel region of the edge black matrix is less than half a width of the pixel region.

Description

Narrow bezel type liquid crystal display device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display (LCD), and more particularly to a liquid crystal display in which a narrow bezel is implemented while securing a margin with polarizer and preventing light leakage.

Recently, liquid crystal displays have been spotlighted as next generation advanced display devices having low power consumption, good portability, high technology value, and high added value.

Of these liquid crystal display devices, an active matrix type liquid crystal display device having a thin film transistor, which is a switching device capable of controlling voltage on and off for each pixel, .

Referring to FIG. 1, which is an exploded perspective view of a general liquid crystal display, a structure thereof will be described. As shown in FIG. 1, the liquid crystal display 1 includes an array substrate 10, which is a lower substrate, with a liquid crystal layer 30 therebetween. The color filter substrate 20, which is the upper substrate, has a configuration in which the color filter substrate 20 is face-to-face bonded to each other, and the array substrate 10, the color filter substrate 20, and the liquid crystal layer 30 are called liquid crystal cells or liquid crystal panels.

Meanwhile, the lower array substrate 10 includes a plurality of gate lines 14 and data lines 16 arranged vertically and horizontally on the top surface of the transparent first substrate 12 to define a plurality of pixel regions P. Thin film transistors T are provided at the intersections of the two wires 14 and 16 so as to correspond one-to-one with the pixel electrodes 18 provided in the pixel regions P. FIG.

In addition, the upper color filter substrate 20 facing the array substrate 10 is a rear surface of the transparent second substrate 22 such as the gate wiring 14, the data wiring 16, the thin film transistor T, and the like. A grid-like black matrix 25 is formed to cover the non-display area, and the red, green, and red layers are sequentially arranged to correspond to the pixel areas P. A color filter layer 26 including blue color filter patterns 26a, 26b, and 26c is formed, and a transparent common electrode 28 is provided over the entire surface of the black matrix 25 and the color filter layer 26. .

Although not shown in the drawings, the array substrate 10 and the color filter substrate 20 may have edges of the two substrates 10 and 20 to prevent leakage of the liquid crystal layer 30 interposed therebetween. Accordingly, in the sealed state with a seal pattern (not shown), upper and lower alignment layers interposed between the substrates 10 and 20 and the liquid crystal layer 30 provide reliability in the molecular alignment direction of the liquid crystal. The outer surfaces of the substrates 10 and 20 are provided with a first polarizing plate (not shown) and a second polarizing plate (not shown) through which light in a specific direction passes. In this case, the optical axes (not shown) of the first polarizing plate (not shown) and the second polarizing plate (not shown) are arranged to be perpendicular to each other.

In addition, a back-light (not shown) is provided on an outer surface of the array substrate 10 to supply light, and the thin film transistor T is turned on / off by the gate line 14. When the (off) signal is sequentially scanned and applied, and the image signal of the data line 16 is transferred to the pixel electrode 18 of the selected pixel region P, the liquid crystal molecules are driven by the vertical electric field therebetween. As a result, various images can be displayed by changing the transmittance of light.

In the liquid crystal display device 1 having such a configuration, the shape and position of the pixel electrode and the common electrode may vary, in particular, depending on the driving method. It may be a device or a fringe field switching mode liquid crystal display.

Liquid crystal display devices having such various configurations require first and second polarizing plates (not shown) arranged so that polarization axes are perpendicular to each other.

Recently, liquid crystal display devices having such a configuration have a smaller bezel defined as a width of a non-display area outside the display area in order to achieve a light weight and to achieve a slim design of a final product such as a monitor or a TV. It is required.

FIG. 2 is a schematic cross-sectional view illustrating a portion of a display area and a portion of a non-display area of a conventional liquid crystal display, and FIG. 3 illustrates a portion of a display area and a non-display area of a liquid crystal display device implementing a conventional narrow bezel. It is a schematic sectional drawing about a cut part. For the convenience of description, the same reference numerals are given to the same components, and the components provided in the array substrate are not shown.

As shown in Figs. 2 and 3, in the non-display area NA outside the display area AA, the edge black matrix 63 is provided on the color filter substrate 61, in particular, and the edge block matrix 63 is provided. A seal pattern 70 is attached to the array substrate 41 and the color filter substrate 61 to maintain the panel state. In addition, in the color filter substrate 61, a pixel black matrix 64 is provided to correspond to the boundary of each pixel area in response to the display area AA. Layer 66 is provided.

In this case, in the conventional general liquid crystal display device 40 that does not implement a narrow bezel, referring to FIG. 2, the width of the non-display area NA is large enough to be 0.7 mm or more. And the first and second polarizing plates 80 and 81 attached to the outer surface of the color filter substrate 61 are disposed so as to completely overlap with the display area AA, so that no light leakage occurs.

However, in the case of the liquid crystal display device 90 implementing the narrow bezel, referring to FIG. 3, the non-display area NA may be 2 mm or less and further minimized to have a width smaller than 0.7 mm. In this case, in particular, the second polarizing plate 82 provided in the color filter substrate 61 having a relatively smaller width does not completely cover the display area AA due to the attachment error caused by the equipment attachment polarizer. The light leakage is generated in the separation area between the 63 and the second polarizing plate 82 to reduce the display quality.

In order to attach the polarizers 80 and 82 to the outer surface of the array substrate 41 or the color filter substrate 61, a margin of at least 0.7 mm from the edge of the substrates 41 and 61 is required at the current polarizer attachment level. This is because when the narrow bezel is maximized to have a width smaller than 0.7 mm, the end of the second polarizing plate 82 is positioned inside the display area AA and attached.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problem, and an object thereof is to provide a liquid crystal display device which can suppress light leakage generated outside the polarizing plate while implementing a narrow bezel.

A liquid crystal display device according to an embodiment of the present invention for achieving the above object, the liquid crystal display device according to an embodiment of the present invention for achieving the above object, a display area having a plurality of pixel areas and the display area A liquid crystal display device comprising: a first substrate having a non-display area surrounding the substrate; a second substrate facing the second substrate; and a liquid crystal layer interposed between the two substrates. An edge black matrix formed around the display area is provided, and the edge black matrix is formed to overlap a plurality of pixel areas provided at the outermost part of the display area.

In this case, the edge black matrix is characterized in that the side end overlapping the outermost pixel region forms a straight line.

The width overlapping the outermost pixel area of the edge black matrix may be 1/2 or less of the width of the pixel area, and the pixel area is defined by crossing the display area of the inner surface of the first substrate. Formed gate wiring lines and data wiring lines; A thin film transistor provided in each pixel area; A pixel electrode connected to the thin film transistor and formed in each pixel area; A pixel black matrix formed at a boundary between the pixel areas in the display area of the inner surface of the second substrate; And a color filter layer overlapping the pixel black matrix and formed to correspond to the display area.

In addition, the inner surface of the second substrate may cover the color filter layer and form a plate-shaped common electrode on the entire display area.

In addition, a common wiring is formed to be spaced apart from the gate wiring, and a protective layer is provided on the entire display area between the pixel electrode and the thin film transistor, and the pixel electrode has a plurality of bars in each pixel area. And a plurality of bar shaped common electrodes connected to the common wirings corresponding to the respective pixel areas and alternate with the plurality of bar shaped pixel electrodes on the passivation layer. In this case, the plurality of bar-shaped pixel electrodes and the common electrode may be symmetrically bent with respect to the center of each pixel area, and the data line may be bent at the boundary of each pixel area. It is characterized by forming a zigzag shape in the display area.

In addition, each of the pixel electrodes has a plate shape in each of the pixel areas, and a first protective layer is formed on the entire surface of the display area between the pixel electrode and the thin film transistor, and a second surface of the display area is disposed on the pixel electrode. A passivation layer is provided, and a common electrode having a plate shape in front of the display area over the second passivation layer and having a plurality of bar-shaped openings corresponding to each pixel area.

In addition, an overcoat layer is formed on the entire surface of the second substrate to cover the color filter layer.

The non-display area other than the area where the driving IC chip or the FPC is mounted among the non-display areas has a width of 2 mm or less.

According to an exemplary embodiment of the present invention, a liquid crystal display device has a narrow bezel having a width of a non-display area of 2 mm or less, thereby providing a lightweight thin liquid crystal display device, and further maximizing the narrow bezel 0.7 mm. Even if it has a smaller width, the border black matrix overlaps the outermost pixel line of the display area in a straight line shape. There is an effect of suppressing the generation to improve the display quality.

1 is a plan view schematically showing a general liquid crystal display device
2 is a schematic cross-sectional view of a portion of a display area and a portion of a non-display area of a conventional LCD according to the related art.
3 is a schematic cross-sectional view of a portion of a display area and a portion of a non-display area of a liquid crystal display device implementing a conventional narrow bezel;
4 is a plan view of a liquid crystal display according to an exemplary embodiment of the present invention.
Fig. 5 is an enlarged view of the area A in Fig. 4; Fig.
FIG. 6 is an enlarged view of a region B of FIG. 4. FIG.
Fig. 7 is a cross-sectional view of a portion cut along line VII-VII of Fig. 5; Fig.
FIG. 8 is a cross-sectional view of the portion of FIG. 5 taken along section line VIII-VIII. FIG.

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

4 is a plan view of a liquid crystal display according to an exemplary embodiment of the present invention, FIG. 5 is an enlarged view of region A of FIG. 4, and FIG. 6 is an enlarged view of region B of FIG. 4. In this case, the array substrate is mainly shown in each drawing, and the edge black matrix provided in the color filter substrate is shown together.

As shown in the drawing, the liquid crystal display device 101 according to an exemplary embodiment of the present invention has a rectangular display area AA for displaying an image, and an edge of the display area AA outside the display area AA. The non-display area NA is provided.

A portion of the non-display area NA, which is located at the upper side or the lower side of the top, bottom, left, and right of the data line 130, is not shown in the drawing, but a plurality of mounting IC chips (not shown) are shown. A driving circuit board (not shown) is provided through an FPC (flexible printed circuit board) (not shown), except for the non-display area NN on the upper side or the lower side on which the driving circuit board (not shown) is mounted. The display area NA has a width of 2 mm or less and a narrow bezel of the display area NA of 0.7 mm or less, which is the maximum tolerance of the polarizer.

On the other hand, in the display area AA of the array substrate for a liquid crystal display according to the embodiment of the present invention, the plurality of data wires 130 and the gate wires defining the plurality of pixel areas P are formed by extending and crossing each other. 103 is formed. In addition, a common wiring 108 is formed through the pixel region P and spaced apart from the gate wiring 103. In this case, the common wiring 108 forms a first storage electrode 109 by itself.

In the pixel region P, the thin film transistor Tr, which is connected to the gate and data lines 103 and 130 and is a switching element, is disposed near the intersection of the gate line 103 and the data line 130. Formed. In this case, the thin film transistor Tr includes a gate electrode 106, a gate insulating film (not shown), and source and drain electrodes 133 and 136 spaced apart from each other.

Meanwhile, an outermost common electrode 172 is formed in each pixel area P through the common wiring 108 and the common contact hole 151 and parallel to the data wiring 130. The auxiliary common pattern 171 is connected to the outermost common electrode 172, and branches from the auxiliary common pattern 171 to parallel the outermost common electrode 172 to form a plurality of central common electrodes 173. Is formed.

In addition, each pixel region P contacts the second storage electrode 139 connected to the drain electrode 136 of the thin film transistor Tr through the drain contact hole 149, and the auxiliary pixel pattern 169 is disposed in the pixel region P. The plurality of pixel electrodes 170 are alternately formed with the common electrodes 172 and 173 by being overlapped with the common wiring 108 and branched from the auxiliary pixel pattern 169.

In this case, the first storage electrode 109 and the second storage electrode 139 overlap each other with the gate insulating layer 110 interposed therebetween to form a storage capacitor.

The outermost and central common electrodes 172 and 173 and the pixel electrode 170 are symmetrically predetermined based on an imaginary reference line parallel to the gate wiring 103 positioned at the center of each pixel region P. FIG. By forming an angled and bent configuration, the upper and lower portions of the pixel region P are different from each other in the direction of the common electrodes 172 and 173 and the pixel electrode 170. Achieve.

In addition, since the pixel electrodes 170 and the common electrodes 172 and 173 have a curved structure, the data wire 130 also has a structure that is symmetrically bent with respect to the central portion of each pixel region P. Since the 130 is not separately formed for each pixel area P but has a configuration connected to the entire display area AA, the data line 130 has a central portion of each pixel area P in the display area AA. It is characterized by a zigzag shape that is bent by reference.

This is because the pixel electrode 170 and the common electrodes 172 and 173 are bent at the center and the data line 130 is zigzag-shaped so that each pixel region P has a double domain region. Since the color shift phenomenon in which the color when viewed from the upper, lower, lower, and lower sides are reversed can be suppressed, it is formed to have the configuration as described above to improve the display quality.

However, the pixel electrode 170 and the common electrodes 172 and 173 may form a straight bar without bending, and the data line 130 may also have a straight straight shape without extension.

Meanwhile, in the liquid crystal display device 100 according to the exemplary embodiment of the present invention, the pixel electrode 170 and the common electrodes 172 and 173 are formed on the same array substrate 101 so that the pixel electrode 170 and the common pixel electrode are adjacent to each other. Although the transverse electric field type liquid crystal display device 100 in which the electrodes 172 and 173 generate a transverse electric field is shown as an example, as a modification, the common electrode (not shown) corresponds to the color filter substrate 181 to display area AA. The pixel electrode (not shown) may be formed on the front surface of the array substrate 101 to form a plate shape corresponding to each pixel area P. In this case, a twisted nematic liquid crystal display device (not shown) may be provided. Will be achieved.

In still another modification, the pixel electrode (not shown) forms a plate corresponding to each pixel area P, and corresponds to the entire surface of the display area AA through an insulating layer over the pixel electrode (not shown). To form a plate shape and a common electrode (not shown) having a plurality of bar openings (not shown) corresponding to each pixel region P, thereby forming a fringe field switching mode liquid crystal display device (not shown). It can also be achieved.

On the other hand, the most characteristic of the liquid crystal display device 100 (not shown) according to the embodiments and modifications of the present invention having such various configurations generally surrounds the display area AA in the non-display area NA. Instead of the edge black matrix (63 of FIGS. 2 and 3) formed on the color filter substrate 181, the display region AA is surrounded by the top, bottom, left, and right sides of the display region AA. The pixel region P provided at the rightmost end and the side end thereof overlap each other, and the edge black matrix 183 is formed in a straight line with respect to the pixel line connecting the end pixel area P. to be.

In a conventional unilateral liquid crystal display device, particularly in a transverse electric field type liquid crystal display device having a dual domain structure, the edge black matrix is formed to surround the display area outside the display area, thereby zigzag to correspond to the non-display areas positioned on the left and right sides of the display area. It was formed in a zigzag shape along the data wiring of the shape.

However, in the liquid crystal display device 100 according to the exemplary embodiment of the present invention, the edge black matrix 183 has a straight line shape at each side thereof and overlaps the horizontal and vertical pixel lines positioned at the outermost portion of the display area AA. It is characterized by being formed.

As such, the edge black matrix 183 overlaps the last pixel area P and a part of the pixel area P in the display area AA so that the driving IC chip (not shown) or the FPC (not shown) is mounted. Although the non-display area NA except the display area NA implements a maximized narrow bezel having a width smaller than about 0.7 mm, the gap between the edge black matrix 183 and the end of the polarizing plate (not shown) is separated. It is possible to suppress the generation of the region and to suppress the display quality deterioration due to light leakage.

In this case, the width of the outermost pixel area P in the display area AA overlapping the edge black matrix 183 may be 1/2 or less of the width of the outermost pixel area P.

The reason why the overlapping width of the edge black matrix 183 and the outermost pixel area P of the display area AA is less than or equal to 1/2 of the width of the pixel area P is because the edge black matrix 183 is a maximum. If the outer pixel area P is completely covered, the width of the edge black matrix 183 overlapping the inside of the display area AA is increased to further secure a tolerance margin when attaching the polarizer (not shown). In this case, the image coming out of the pixel line of the outermost display area AA cannot be viewed. In particular, when the color filter layer (not shown) is formed in a stripe type, a full color implementation is realized through three pixel areas P adjacent to each other by masking the leftmost red pixel line and the rightmost blue pixel line. Since the pixel line is not implemented in full color, the display area AA may have an evaluation that the display quality is not good because the user may feel visually.

Therefore, the liquid crystal display device 100 according to the exemplary embodiment of the present invention allows the image information to be output to all the pixel areas P in consideration of the user's visibility characteristics, and may be generated by a narrow bezel implementation (not shown). Even if a portion of the display area AA is exposed to the outside of the polarizer (not shown) by one side bias, a portion of the display area AA that is exposed to the outside of the end of the polarizer (not shown) is covered by the edge black matrix 183. It is characterized by being able to suppress light leakage.

Typically, the pixel area P has a width three times larger in the extension direction of the data line 130 than the width in the extension direction of the gate line 103. Therefore, the outermost portion of the edge black matrix 183 provided on the upper and lower sides of the display area AA is larger than the width overlapping the outermost pixel region P of the edge black matrix 183 provided on the left and right sides of the display area AA. The width overlapping the pixel area P may have a maximum value of 3 times.

Typically, since one pixel area P has a width of about 100 μm to 600 μm, the width overlapping the edge black matrix 183 with the outermost pixel area P is about 50 μm to 300 μm. Therefore, in the liquid crystal display device 100 according to the exemplary embodiment of the present invention, a margin for attaching a polarizing plate (not shown) to about 100 μm to 600 μm can be secured compared to a conventional liquid crystal display device (90 of FIG. 3).

The configuration of the edge black matrix 183 may be applied to a model in which the width of the non-display area NA becomes 0.7 mm or less, which is the minimum tolerance required when attaching a polarizer (not shown). It will be apparent that the present invention can be applied to a liquid crystal display having a narrow bezel having a width of about 0.7 to 2 mm.

Hereinafter, the cross-sectional structure of the liquid crystal display device according to the embodiment of the present invention having the above-described configuration will be described.

FIG. 7 is a cross-sectional view of a portion taken along the cutting line VII-V and FIG. 8 is a cross-sectional view of a portion taken along the cutting line VII-V. In this case, for convenience of description, an area in which the thin film transistors are formed in each of the pixel areas P included in the display area AA is defined as a switching area, and an area in which the storage capacitor StgC is formed is a storage area StgA. Is defined as).

As shown, the liquid crystal display device 100 according to an exemplary embodiment of the present invention includes a lower array substrate 101, an upper color filter substrate 181, and a liquid crystal layer interposed between the two substrates 101 and 181. And the first and second polarizers 210 and 220 attached to the outer surface of the array substrate 101 and the color filter substrate 181.

First, the gate substrate 103 in FIG. 5 is formed in the array substrate 101 to extend in one direction corresponding to the display area AA, and the common wiring is spaced apart from the gate wiring 103 in FIG. (108 of FIG. 5) is formed. In this case, a portion of the gate line 106 branches from the gate line 103 in correspondence with the switching region TrA, or a portion thereof forms the gate electrode 106, and the common line corresponds to the storage region. 108 in FIG. 5 forms the first storage electrode 109 in itself.

Next, an inorganic insulating material, for example, silicon oxide (SiO ₂ ), is disposed on the gate wiring (103 in FIG. 5), the gate electrode 106, the common wiring (108 in FIG. 5), and the first storage electrode 109. Alternatively, a gate insulating layer 110 made of silicon nitride (SiNx) is formed.

In addition, a semiconductor layer 120 including an active layer 120a made of pure amorphous silicon and an ohmic contact layer 120b made of impurity amorphous silicon is formed in the switching region TrA on the gate insulating layer 110.

A data line 130 is formed on the gate insulating layer 110 to intersect the gate line 103 in FIG. 5 to define the pixel region P. Referring to FIG. In this case, although the data wire 130 is shown to form a zigzag shape, it may also form a straight line.

In the switching region TrA, a source electrode 133 is formed on the semiconductor layer 120 by branching from the data line 130, and a drain electrode 136 is spaced apart from the source electrode 133. have.

In this case, the gate electrode 106, the gate insulating layer 110, the semiconductor layer 120, and the source and drain electrodes 133 and 136 spaced apart from each other are sequentially stacked in the switching region TrA. ).

In addition, a second storage electrode 139 is formed in the storage region StgA by extending the drain electrode 136 on the gate insulating layer 110 to correspond to the first storage electrode 109. In this case, the first storage electrode 109, the gate insulating layer 110, and the second storage electrode 139 sequentially stacked in the storage region StgA form a storage capacitor StgC.

Next, the second storage electrode 139 connected to the drain electrode 127 of the thin film transistor Tr over the data line 130, the source and drain electrodes 133 and 136, and the second storage electrode 139. The first protective layer 141 and the second protective layer 146 having the drain contact hole 149 and the common contact hole 151 respectively exposed to the common wiring (not shown) are formed. In this case, the first protective layer 141 is made of an inorganic insulating material, for example, silicon oxide (SiO ₂ ) or silicon nitride (SiNx), and the second protective layer 146 is made of an organic insulating material, for example, benzo. It consists of cyclobutene (BCB) or photo acryl (photo acryl) is characterized by a flat surface.

The protective layers 141 and 146 have a double layer structure. The active layer 120a and the organic insulating material in which the channel exposed between the source electrode 133 and the drain electrode 136 are formed in the thin film transistor Tr. In order to suppress the deterioration of the characteristics of the thin film transistor Tr due to the contamination of the active layer 120a which may be generated by the direct contact of the second protective layer 141, the second protective layer having a flat surface. This is to maximize the strength of the transverse electric field generated between the pixel electrode 170 having a bar shape and the common electrodes 172 and 173 provided on the upper portion 146.

However, the protective layers 141 and 146 are not necessarily formed to have a double layer structure, and any one of the first and second protective layers 141 and 146 may be omitted, thereby providing a single layer protective layer (not shown). May be achieved.

On the other hand, in each pixel region P above the second protective layer 146, a transparent conductive material, for example, indium tin oxide (ITO) or indium zinc oxide (IZO), or an opaque metal material. For example, two outermost common electrodes 172 formed of molybdenum (Mo) or molybdenum (MoTi) and contacting the common wiring (not shown) are formed through the common contact hole (not shown). The auxiliary common pattern 171 is connected to one end of the outermost common electrode 172 and branched from the auxiliary common pattern 171 to form a central bar common electrode 173 having a plurality of bars. It is being formed.

In addition, each pixel region P is formed of the same material as the common electrodes 172 and 173 on the second passivation layer 131 and connected to the drain electrode 136 through the drain contact hole 149. The auxiliary pixel pattern 169 is provided in contact with and overlaps with the second storage electrode 139. The second pixel pattern 169 branches from the auxiliary pixel pattern 169 and alternates with each of the plurality of common electrodes 172 and 73. A bar electrode pixel electrode 170 is formed.

In this case, in the drawing, the plurality of common electrodes 172 and 173 and the pixel electrode 170 form a double domain by forming a symmetrically bent structure with respect to the center part in each pixel region P. However, the plurality of common electrodes 172 and 173 and the pixel electrode 170 may have a straight line shape.

In addition, although not shown in the drawing, in the case of the array substrate for a liquid crystal display device according to a modification of the present invention, the common electrodes 172 and 173 having a bar shape on the second protective layer 146 and alternately formed with each other. And a plate-shaped pixel electrode (not shown) as a transparent conductive material in each pixel region P on the second passivation layer 146 instead of the pixel electrode 170. And a third passivation layer (not shown) formed in contact with the drain electrode 136, covering the plate-shaped pixel electrode (not shown), and a display area over the third passivation layer (not shown). A common electrode (not shown) having a plate shape on the front surface of the AA and having a plurality of bar-shaped openings (not shown) corresponding to each pixel area P may be formed. An array substrate having such a configuration forms an array substrate (not shown) for a fringe field switching mode liquid crystal display device. In this case, the common wiring 108 of FIG. 5 may be omitted.

In addition, although not shown in the drawings, in the case of an array substrate (not shown) for a liquid crystal display device according to another modified embodiment of the present invention, the second protective layer 146 is formed on the bar (bar) and alternately formed with each other Instead of the common electrodes 172 and 173 and the pixel electrode 170, a plate-shaped pixel electrode (not shown) is formed as a transparent conductive material in each pixel region P on the second protective layer 146. It may be formed in contact with the second storage electrode 139 connected to the drain electrode 136 through the hole 149. In this case, the bar-shaped common electrodes 172 and 173 are omitted and form a configuration formed on the entire inner surface of the color filter substrate 181 facing them. An array substrate having such a configuration (not shown) becomes an array substrate for twisted nematic liquid crystal display device. In this case, the common wiring 108 of FIG. 5 may be omitted.

On the other hand, the configuration of the color filter substrate 181 positioned corresponding to the array substrate 101 (not shown) according to the embodiment of the present invention having the above-described configuration and various modifications of the color filter substrate 181 On the inner side, a pixel black matrix 184 is provided corresponding to the boundary of each pixel region P and the thin film transistor Tr, and surrounds the display region AA and the outermost pixel of the display region AA. The border black matrix 183 is formed while overlapping the line.

In addition, the area partially overlapped with the pixel black matrix 184 corresponding to the display area AA and captured by the pixel black matrix 184 may correspond to each pixel area P in a sequential order such as red, green, and green. A color filter layer 186 including a blue color filter pattern (red, green, blue) is formed.

In addition, an overcoat layer 189 is formed to cover the color filter layer 186 to protect the color filter layer 186.

The configuration of the color filter substrate 181 may include a case in which both the common electrodes 172 and 173 and the pixel electrode 170 are provided on the array substrate 101 disposed below the array substrate 101. In the case of an array substrate (not shown) for a twisted nematic liquid crystal display device according to a modified example, a common electrode (not shown) made of a transparent conductive material is formed on the entire surface instead of the overcoat layer 189.

In addition, an edge of the array substrate 101 and the color filter substrate 181 having such a configuration may be more precisely overlapped with the edge black matrix 183 surrounding the display area AA and provided with a seal pattern (not shown). The liquid crystal layer 190 is provided in an area surrounded by the seal pattern (not shown).

The liquid crystal display device 100 (not shown) according to the embodiments and modifications of the present invention having the above-described configuration implements a narrow bezel having a width of the non-display area NA smaller than 2 mm to reduce the weight of the liquid crystal display device. In addition, even if the narrow bezel is configured to maximize the narrow bezel so that the width of the non-display area 183 is 0.7 mm or less, the black matrix 183 of the edges of the display area AA and the outermost pixel line may be provided. By overlapping in a straight line shape, light leakage occurs in the display area AA that does not overlap the polarizing plates 210 and 220 even when the ends of the polarizing plates are located inside the display area AA due to tolerances when the polarizing plates 210 and 220 are attached. There is an effect of suppressing the generation to improve the display quality.

100: liquid crystal display device
103: gate wiring
130: Data wiring
183: Black Matrix
AA: Display Area
NA: non-display area
P: pixel area

Claims (10)

A liquid crystal display device comprising: a display substrate having a plurality of pixel regions; a first substrate having a non-display region surrounding the display region; a second substrate facing the liquid crystal layer; and a liquid crystal layer interposed between the two substrates. ,
The edge black matrix formed around the display area is provided on the non-display area of the inner surface of the second substrate, and the edge black matrix is formed to overlap the plurality of pixel areas provided at the outermost part of the display area. LCD display device.
The method of claim 1,
And wherein the edge black matrix has a straight line with a side end overlapping the outermost pixel area.
The method of claim 1,
And a width overlapping the outermost pixel area of the edge black matrix is 1/2 or less of the width of the pixel area.
The method of claim 3, wherein
Gate wiring and data wiring intersecting the display region of the inner surface of the first substrate to define the pixel region;
A thin film transistor provided in each pixel area;
A pixel electrode connected to the thin film transistor and formed in each pixel area;
A pixel black matrix formed at a boundary between the pixel areas in the display area of the inner surface of the second substrate;
A color filter layer overlapping the pixel black matrix and formed to correspond to the display area
Liquid crystal display comprising a.
5. The method of claim 4,
And a plate-shaped common electrode formed on the entire surface of the display area and covering the color filter layer on the inner side of the second substrate.
5. The method of claim 4,
The common wiring is spaced parallel to the gate wiring,
A protective layer is provided in front of the display area between the pixel electrode and the thin film transistor.
The pixel electrode has a plurality of bars in each pixel area.
And a plurality of bar shaped common electrodes formed on the passivation layer to be connected to the common wirings corresponding to the respective pixel areas and alternate with the plurality of bar shaped pixel electrodes. .
The method according to claim 6,
The plurality of bar-shaped pixel electrodes and the common electrode may be symmetrically bent with respect to the center of each pixel area.
And the data line is zigzag in the display area by forming a configuration bent at the boundary of each pixel area.
5. The method of claim 4,
Each pixel electrode has a plate shape in each pixel area,
A first passivation layer is disposed in front of the display area between the pixel electrode and the thin film transistor.
A second passivation layer is formed over the pixel electrode in front of the display area;
And a common electrode having a plate shape in front of the display area over the second passivation layer and having a plurality of bar-shaped openings corresponding to each pixel area.
9. The method according to claim 6 or 8,
And an overcoat layer covering the color filter layer on the entire surface of the second substrate.
The method according to any one of claims 5, 6 and 8,
And a non-display area other than the area in which the driving IC chip or the FPC is mounted among the non-display areas has a width of 2 mm or less.

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