KR101297247B1 - In plane switching mode liquid crystal display device - Google Patents

Abstract

The transverse electric field mode liquid crystal display device according to the present invention is to prevent the foreground from occurring between the center region and the edge region of the pixel, and includes a plurality of pixels defined by gate lines and data lines, and a switching element formed in the pixel. And a common electrode and a pixel electrode disposed substantially parallel in the pixel to form a transverse electric field, and protruding regions are formed at an end of the common electrode to form a transverse electric field of the entire pixel in substantially the same direction. It features.

Transverse electric field mode, foreground, pixel, corner area, protrusion area

Description

Transverse electric field mode liquid crystal display device {IN PLANE SWITCHING MODE LIQUID CRYSTAL DISPLAY DEVICE}

1A and 1B show a basic concept of a transverse electric field mode liquid crystal display device.

2 is a plan view showing the structure of a conventional transverse electric field mode liquid crystal display device.

3A and 3B are enlarged views of region A of FIG. 1, and FIG. 3A is a diagram illustrating an alignment state of liquid crystal molecules when no signal is applied to the pixel electrode, and FIG. 3B is a liquid crystal when a signal is applied to the pixel electrode. A diagram showing the orientation of molecules.

4 is a plan view showing the structure of a transverse electric field mode liquid crystal display device according to the present invention.

5 is a cross-sectional view taken along line II ′ of FIG. 4.

6A and 6B are enlarged views of region B of FIG. 4, and FIG. 6A is a view illustrating an alignment state of liquid crystal molecules when no signal is applied to the pixel electrode, and FIG. 6B is a liquid crystal when a signal is applied to the pixel electrode. A diagram showing the orientation of molecules.

7A and 7B are enlarged views of region B of FIG. 4, illustrating another structure of the common electrode and the pixel electrode.

Description of the Related Art [0002]

102 gate line 103 data line

105: common electrode 107: pixel electrode

108: common line 109: pixel electrode line

115: thin film transistor 116: gate electrode

117: semiconductor layer 118: source electrode

119: drain electrode

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transverse field mode liquid crystal display device, and more particularly, to a transverse field mode liquid crystal display device capable of preventing disclination due to a distorted electric field by changing end shapes of a common electrode and a pixel electrode disposed in a pixel. It is about.

2. Description of the Related Art Recently, various portable electronic devices such as a mobile phone, a PDA, and a notebook computer have been developed. Accordingly, there is a growing need for a flat panel display device for a light and small size. Such flat panel displays are being actively researched, such as LCD (Liquid Crystal Display), PDP (Plasma Display Panel), FED (Field Emission Display), VFD (Vacuum Fluorescent Display), but mass production technology, ease of driving means, Liquid crystal display devices (LCDs) are in the spotlight for reasons of implementation.

The liquid crystal display device has various display modes according to the arrangement of liquid crystal molecules. However, TN mode liquid crystal display devices are mainly used because of the advantages of easy monochrome display, fast response speed, and low driving voltage. In such a TN mode liquid crystal display element, liquid crystal molecules aligned horizontally with the substrate are oriented substantially perpendicular to the substrate when a voltage is applied. Therefore, there is a problem that the viewing angle is narrowed upon application of voltage due to the refractive anisotropy of the liquid crystal molecules.

In order to solve this viewing angle problem, liquid crystal display devices of various modes having wide viewing angle characteristics have recently been proposed, but among them, the liquid crystal display device of the lateral field mode (In Plane Switching Mode) is applied to actual production. It is produced. The IPS mode liquid crystal display device improves the viewing angle characteristic by forming a planar transverse electric field when a voltage is applied and aligning the liquid crystal molecules in a planar manner. The basic concept is illustrated in FIGS. 1A and 1B.

As shown in FIG. 1A, in the IPS mode liquid crystal display device, the common electrode 5 and the pixel electrode 7 are arranged substantially in parallel on the liquid crystal panel 1, and an alignment layer formed on the panel 1 is formed. The rubbing direction is formed at a predetermined angle with the common electrode 5 and the pixel electrode 7. Therefore, when no voltage is applied to the pixel electrode 7, the liquid crystal molecules 42 are arranged along the rubbing direction and are oriented at a constant angle with the common electrode 5 and the pixel electrode 7.

When a voltage is applied to the common electrode 5 and the pixel electrode 7, a transverse electric field substantially parallel to the surface of the panel 1 is generated between the common electrode 5 and the pixel electrode 7, and FIG. 1B. As shown in FIG. 2, the liquid crystal molecules 42 are oriented perpendicular to the common electrode 5 and the pixel electrode 7.

In other words, when a voltage is applied, the liquid crystal molecules 42 rotate on the same plane along the transverse electric field, and as a result, gray level inversion due to refractive anisotropy of the liquid crystal molecules 42 can be prevented.

However, in the IPS mode liquid crystal display device as described above, there is a problem that the color changes according to the viewing angle direction. Although not shown, the common electrode 5 and the pixel electrode 7 are formed on the first substrate (the TFT substrate on which the thin film transistor is formed) of the liquid crystal display device. The liquid crystal molecules 42a are oriented perpendicular to the common electrode 5 and the pixel electrode 7 by the transverse electric field, while the liquid crystal molecules 42b near the second substrate (the color filter substrate on which the color filter is formed) are common. The electrodes 5 and the pixel electrodes 7 are oriented at a predetermined angle. That is, the liquid crystal molecules 42a and 42b are twisted from the first substrate to the second substrate. At this time, since the liquid crystal molecules 42 are twisted in a specific direction, color conversion occurs in the viewing angle directions of X and Y, as shown in FIG.

In order to solve the above problems, an IPS mode liquid crystal display device having a structure as shown in FIG. 2 has been proposed. As shown in Fig. 2, in the IPS mode liquid crystal display device of this structure, the data lines 3 are arranged not at right angles to the gate line 2 but at a predetermined angle. In addition, the common electrode 5 and the pixel electrode 7 arranged in the pixel defined by the gate line 2 and the data line 3 to form a transverse electric field also have a constant angle with the gate line 2, that is, It is arranged parallel to the data line (3). In the pixel, the common line 8 to which the common electrode 5 is connected and the pixel electrode line 9 to which the pixel electrode 7 is connected are overlapped to form storage capacitance.

The pixel is divided into two domains around the extension direction of the gate line 2 formed in the pixel. That is, the common electrode 5 and the pixel electrode 7 are symmetrically arranged around the extension direction of the gate line 2 with respect to the center of the pixel. Therefore, since the transverse electric fields in the upper and lower domains are symmetrically applied to each other, the viewing angle in one pixel can be compensated to improve the viewing angle characteristic.

The thin film transistor 15 including the gate electrode 16, the semiconductor layer 17, the source electrode 18, and the drain electrode 19 is formed in an area where the gate line 2 and the data line 3 intersect in the pixel. In this case, a signal input from the outside is applied to the pixel electrode 7, and a transverse electric field is generated in the liquid crystal layer as the signal is applied.

In this case, reference numeral 34 denotes a color filter layer that implements actual colors. The color filter layer 34 is formed in an image display area of a pixel, and overlaps a part of the common electrode 5 that is outermost to the pixel (that is, disposed near the data line 3).

In the IPS mode liquid crystal display device having the above-described structure, the liquid crystal molecules rotate on the same plane along the transverse electric field, thereby preventing gray level inversion due to refractive anisotropy of the liquid crystal molecules. In addition, the viewing angle characteristic can be improved by configuring the pixel in two domains with different viewing angles.

However, the conventional transverse electric field mode liquid crystal display device as described above has the following problems.

Although the common electrode 5 and the pixel electrode 7 are arranged substantially parallel to the entire pixel to form a uniform transverse electric field, the common electrode 5 is formed at the end regions of the common electrode 5 and the pixel electrode 7. ) And the pixel electrodes 7 are not arranged in parallel, the transverse electric field is distorted.

3A and 3B are enlarged views of region A of FIG. 2, in which driving and alignment states of liquid crystal molecules are not applied between the common electrode 5 and the pixel electrode 7 and when an electric field is applied. Is shown.

As shown in FIG. 3A, when no signal is applied to the common electrode 5 and the pixel electrode 7, no liquid crystal molecule 41 is formed between the common electrode 5 and the pixel electrode 7. And 42 are oriented along the alignment direction of the alignment film (not shown). In general, the alignment direction is at an acute angle with the common electrode 5 and the pixel electrode 7, and is formed in the y-direction, that is, the vertical direction of the gate line 3 in the drawing. Therefore, when no transverse electric field is formed between the common electrode 5 and the pixel electrode 7, the liquid crystal molecules 41 and 42 are oriented perpendicular to the gate line 3 along the alignment direction.

As shown in FIG. 3B, when an image signal is applied to the pixel electrode 7, a transverse electric field E ₁ is formed between the common electrode 5 and the pixel electrode 7. Typically, the transverse electric field E ₁ is formed perpendicular to the extending direction of the common electrode 5 and the pixel electrode 7. However, due to the shape of the common electrode 5 and the pixel electrode 7 at the ends of the common electrode 5 and the pixel electrode 7, that is, at the corners of the pixel, the transverse electric field E ₂ is distorted to cause the common electrode 5 to be distorted. And not perpendicular to the extending direction of the pixel electrode 7. The transverse electric fields E ₁ and E ₂ in the center region and the corner region of the pixel are different because the shapes of the common electrode 105 and the pixel electrode 107 in the corner region are different from those of the center region (that is, The common electrode is broken and the pixel electrode is bent), so that the equipotential surfaces of the common electrode 105 and the pixel electrode 107 are different in the center region and the corner region of the pixel.

As described above, when the transverse electric fields E ₁ and E _{2 in} different directions are formed in the center region and the corner region of the pixel, the alignment directions of the liquid crystal molecules 41 and 42 in the center region and the corner region of the pixel are different. In particular, as shown in FIG. 3B, in the center region of the pixel, the liquid crystal molecules 41 are oriented in a clockwise direction, whereas at the corners of the pixel, that is, at the ends of the common electrode 5 and the pixel electrode 7. The liquid crystal molecules 42 are oriented in a counterclockwise direction. In other words, the direction of rotation of the liquid crystal molecules in the center region and the corner region of the pixel is reversed.

As described above, in the conventional transverse electric field mode liquid crystal display device, since the alignment direction and rotation direction of the liquid crystal molecules 41 and 42 in the center region and the corner region of the pixel are different, the transmittance in the corresponding region is different. Discrimination occurs at the boundary between the two, and the occurrence of the foreground is an important cause of deterioration of the image quality of the liquid crystal display device and the failure of the liquid crystal display device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above, and the transverse electric field mode which prevents the foreground from occurring on the screen by forming a protruding region in the common electrode of the pixel edge region and orienting the liquid crystal molecules in a predetermined direction over the entire pixel. It is an object to provide a liquid crystal display device.

In order to achieve the above object, the transverse electric field mode liquid crystal display device according to the present invention comprises a first substrate and a second substrate; A plurality of pixels defined by gate lines and data lines formed on the first substrate; A switching element formed in said pixel; A common electrode and a pixel electrode disposed substantially parallel in the pixel to form a transverse electric field; A common line disposed in the pixel and electrically connected to the common electrode; A pixel electrode line disposed in the pixel and electrically connected to the pixel electrode; A protruding region protruding from an end of the common electrode along an extension direction of the gate line; And a chamfering region formed at a connection portion of the pixel electrode and the pixel electrode line, wherein the protruding region and the chamfering region are formed to face each other so that an electric field is formed between the protruding region of the common electrode and the chamfering region of the pixel electrode and the pixel electrode line. An equipotential surface is formed, and the length t of the protruding region is d / 4 ≦ t ≦ 3d / 4, where d is a gap between the common electrode and the pixel electrode.

The protruding region protrudes along the extending direction of the gate line or along the extending direction and the vertical direction of the gate line, that is, along the (x, -y directions).

The common electrode and the pixel electrode in the pixel are formed on the passivation layer and bent at least once so that the pixels are divided into a plurality of domains having different viewing angle directions.

In the present invention, the transverse electric field is formed in substantially the same direction over the entire pixel so that the liquid crystal molecules are always rotated in the same direction and oriented in the same direction. In particular, in the present invention, the transverse electric field directions in the corner regions of the pixel, that is, the common electrode and the end region of the pixel electrode are changed to form substantially the same transverse electric field throughout the pixel.

To this end, in the present invention, the shapes of the common electrode and the pixel electrode are changed. In particular, the end edge of the common electrode is extended so that an electric field in the corner region is formed substantially perpendicular to the electrode.

Hereinafter, a transverse electric field mode liquid crystal display device according to the present invention will be described in detail with reference to the accompanying drawings.

4 is a view showing the structure of a transverse electric field mode liquid crystal display device according to the present invention.

As illustrated in FIG. 4, pixels of the liquid crystal panel are defined by gate lines 102 and data lines 103 arranged vertically and horizontally. Although only the (n, m) -th pixel is shown in the figure, n and m gate lines 102 and data lines 103 are arranged in an actual liquid crystal panel, respectively, and n × m is applied to the entire liquid crystal panel. Pixels are formed. The thin film transistor 115 is formed at the intersection of the gate line 102 and the data line 103 in the pixel. The thin film transistor 115 may include a gate electrode 116 to which a scan signal is applied from the gate line 102, and a semiconductor layer formed on the gate electrode 116 and activated as a scan signal is applied to form a channel layer. 117 and a source electrode 118 and a drain electrode 119 formed on the semiconductor layer 117 and to which an image signal is applied through the data line 103. The image signal input from the outside is applied to the liquid crystal layer. do.

In the pixel, a plurality of common electrodes 105 and a pixel electrode 107 are disposed substantially parallel to the data line 103. In addition, a common line 108 connected to the common electrode 105 is disposed in the pixel, and a pixel electrode line 109 connected to the pixel electrode 107 is disposed on the common line 108. Form an accumulation capacity with line 108. In this case, the electrical connection between the common electrode 105 and the common line 108 and the electrical connection between the pixel electrode 107 and the pixel electrode line 109 are made through contact holes.

In the IPS mode liquid crystal display device configured as described above, the liquid crystal molecules are aligned substantially parallel to the common electrode 105 and the pixel electrode 107. When the thin film transistor 115 is operated to apply a signal to the pixel electrode 107, a transverse electric field substantially parallel to the liquid crystal panel is generated between the common electrode 105 and the pixel electrode 107. Since the liquid crystal molecules rotate on the same plane along the transverse electric field, gray level inversion due to the refractive anisotropy of the liquid crystal molecules can be prevented.

Meanwhile, the data line 103, the common electrode 105, and the pixel electrode 107 are bent to form a plurality of domains. That is, the horizontal electric field formed between the common electrode 105 and the pixel electrode 107 by dividing the pixel into a plurality of domains is formed in a different direction. Accordingly, liquid crystal molecules oriented along the transverse electric field are oriented in different directions to form different viewing angles in each domain, thereby compensating the viewing angle direction of the entire pixel, thereby improving the viewing angle characteristic.

Although the data line 103, the common electrode 105, and the pixel electrode 107 are bent only once to divide the pixel into two domains in the drawing, the data line 103, the common electrode 105, and the pixel electrode ( 107) may be bent two or more times and divided into three or more domains. In addition, bending of the data line 103, the common electrode 105, and the pixel electrode 107 may be performed in units of pixels instead of in the pixels. That is, the data line 103, the common electrode 105, and the pixel electrode 107 of the one pixel are formed to be inclined at a predetermined angle, and the data line 103, the common electrode 105, and the pixel electrode 107 of the adjacent pixel are formed. The data line 103, the common electrode 105, and the pixel electrode 107 disposed symmetrically to each other may be formed to be bent at the boundary of the pixel.

As shown in FIG. 4, an end portion of the common electrode 105 is partially protruded (or extended) and an edge of the pixel electrode 107 opposite the protruded (or extended) end 105a is chamfered. Has become. As described above, protruding an end of the common electrode 105 and chamfering the edge of the pixel electrode 107 opposite to the edge of the common electrode 105 are a transverse electric field generated between the corner region of the pixel, that is, between the common electrode 105 and the pixel electrode 107. To adjust. That is, by adjusting the equipotential surface, the transverse electric field in the corresponding region is formed in the same direction as the transverse electric field of all pixels.

FIG. 5 is a cross-sectional view taken along line II ′ of FIG. 4, and the lateral field mode liquid crystal display device according to the present invention will be described in more detail with reference to the FIG.

As shown in FIG. 5, a gate electrode 116 is formed on the first substrate 120, and the gate insulating layer 122 is stacked on the entire first substrate 120. In addition, although not shown in the drawing, a common line 108 is formed on the fraudulent first substrate 120. The common line 108 may be formed of a different metal from the gate electrode 116, but is preferably formed of the same metal by the same process.

The semiconductor layer 17 is formed on the gate insulating layer 122, and the source electrode 118, the drain electrode 119, and the data line 103 are formed thereon. Although not shown in the drawing, a pixel electrode line 109 formed by the same process as the source electrode 118 and the drain electrode 119 is formed on the gate insulating layer 122. In addition, a passivation layer 124 is formed on the entire first substrate 120.

In addition, although not shown in the drawing, the protective layer 124 is provided with an alignment layer for orienting liquid crystal molecules in a specific direction.

The common electrode 105 and the pixel electrode 107 are formed on the passivation layer 124. The common electrode 105 and the pixel electrode 107 are for forming a transverse electric field therebetween, and are made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO). In this case, although not shown in the drawing, the common electrode 105 is electrically connected to the common line 108 through contact holes formed in the gate insulating layer 122 and the protection layer 124, and the pixel electrode 107 is protected. The contact hole formed in the layer 124 is electrically connected to the pixel electrode line 109.

In the above description, the structure of the common electrode 105 and the pixel electrode 107 and the structure of the common line 108 and the pixel electrode line 109 are described as specific structures, but this is merely for convenience of description and the present invention. It is not intended to limit. For example, the common electrode 105 is formed on the first substrate 120 to be connected to the common line 118, and the pixel electrode 107 is formed on the gate insulating layer 122 to be connected to the pixel electrode line 119. In this case, the common electrode 105 and the pixel electrode 107 may be formed of a transparent conductive material, or may be formed of a metal such as the gate electrode 116 or the source electrode 118. Only one electrode of the common electrode 105 and the pixel electrode 107 may be formed of the transparent conductive material and formed on the protective layer 124. In addition, the formation positions of the common line 118 and the pixel electrode line 119 are not limited to the positions described above, but may also be formed on various positions, for example, the protective layer 124.

In other words, the transverse electric field mode liquid crystal display device of the present invention can be formed in any structure as long as it can satisfy the formation of the transverse electric field having the same direction in the pixel which is one of the most important features of the present invention.

Meanwhile, the black matrix 132 and the color filter layer 134 are formed on the second substrate 130. The black matrix 132 is to prevent light leakage into an area in which the liquid crystal molecules do not operate. As shown in the drawing, the black matrix 132 is between the region of the thin film transistor 110 and the pixel and the pixel (ie, the gate line and the data line). Area). In addition, although not shown in the drawing, an alignment layer for aligning the liquid crystal molecules is formed on the second substrate 130, and an overcoat layer for planarizing the second substrate 130 may be formed.

The liquid crystal layer 140 is formed between the first substrate 120 and the second substrate 130 to complete the liquid crystal panel.

6A and 6B are enlarged views of region B of FIG. 5, illustrating driving and alignment states of liquid crystal molecules in end regions of the common electrode 105 and the pixel electrode 107.

First, as illustrated in FIG. 6A, an end portion of the common electrode 105 protrudes into a corner region of the pixel electrode 107, and a curved portion of the pixel electrode 107 is chamfered. At this time, the alignment direction of the alignment layer (not shown) is formed in the y-direction, that is, perpendicular to the gate line 103. Orientation direction may be generally formed by a rubbing method, but a photoalignment method using light or an electric field orientation method using an electric field, or a method of determining the orientation direction by forming the alignment film as a ferroelectric liquid crystal alignment film may also be used. .

As shown in FIG. 6A, when no signal is applied to the pixel electrode 107, an electric field is not formed between the common electrode 105 and the pixel electrode 107, so that the liquid crystal molecules 141 and 142 of the entire pixel region are formed. It is oriented along the alignment direction in the y-direction (ie, the direction perpendicular to the extending direction of the gate line 102).

As shown in FIG. 6B, when an image signal is applied to the pixel electrode 107, horizontal electric fields E ₁ and E ₂ are formed between the common electrode 105 and the pixel electrode 107. In this case, in the central region of the pixel, the transverse electric field E ₁ is formed in a direction perpendicular to the common electrode 105 and the pixel electrode 107. In addition, the transverse electric field E ₂ formed in the corner region of the pixel, that is, the end region of the common electrode 105 and the pixel electrode 107 is similar to the transverse electric field E ₁ of the pixel center region. It is formed almost perpendicular to the pixel electrode 107. The reason is that the equipotential surface between the common electrode 105 and the pixel electrode 107 in the corresponding region is almost caused by the protruding region 105a and the chamfered pixel electrode 107 of the common electrode 105. And substantially parallel to the pixel electrode 107. That is, the common electrode 105 and the pixel electrode 107 are formed differently from the common electrode and the pixel electrode of the conventional transverse electric field mode liquid crystal display device shown in FIGS. 4A and 4B to change the equipotential surface in the corresponding region, and Accordingly, the transverse electric field E _{2 is} formed to be substantially perpendicular to the common electrode 105 and the pixel electrode 107.

As described above, since the transverse electric fields E ₁ and E ₂ in the entire pixel are formed in the same direction, the liquid crystal molecules 141 and 142 rotate in the same direction and are oriented in the same direction over the entire pixel. Therefore, the foreground can be prevented from occurring in the pixel.

The length t of the protruding region 105a of the common electrode 105 is a distance d between the common electrode 105 and the pixel electrode 107, and the common electrode 105 and the pixel electrode 107. Although it is determined by various factors such as the width of and the like, it is preferable to form about d / 4 ≦ t ≦ 3d / 4.

7A and 7B are diagrams illustrating another structures of the common electrode 105 and the pixel electrode 107 in the transverse electric field mode liquid crystal display device according to the present invention. Substantially, the structure shown in FIGS. 7A and 7B is similar to the structure shown in FIGS. 6A and 6B. The difference is only that, in FIGS. 6A and 6B, the region 105a protruding from the end of the common electrode 105 protrudes only in the x-direction, whereas in this structure, the protruding region 105a of the common electrode 105 ) Also protrudes by l in the y-direction. That is, they protrude in the x and y-directions ((x, -y) directions). As described above, as the protruding region 105a protrudes not only in the x-direction but also in the y-direction, the equipotential surface between the common electrode 105 and the pixel electrode 107 becomes the common electrode 105 and the pixel electrode 107. It is formed in more parallel to the transverse electric field (E ₁ , E ₂ ) of a more constant direction is formed, as a result it is possible to effectively prevent the foreground from occurring in the pixel.

In this case, it is preferable that the protruding distance (or extension distance) in the x-direction of the protruding region 105a is set to about d / 4 ≦ t ≦ 3d / 4.

In the above description, although the present invention has been described using specific structures as examples, the present invention is not limited to such specific structures. The present invention can be applied to a transverse field mode liquid crystal display device having all possible structures, provided that the protruding region is formed in the common electrode so that the electric field of the pixel edge region can be formed in the same direction as the electric field of the central region. Accordingly, the scope of the present invention should not be defined by the foregoing detailed description, but should be determined by the appended claims.

As described above, in the transverse electric field mode liquid crystal display device of the present invention, the protruding region is formed in the common electrode so that the electric field of the pixel edge region can be formed in the same direction as the electric field of the center region, and as a result, all liquid crystal molecules in the pixel. In addition to the same rotation direction, the alignment direction of the liquid crystal molecules can be made substantially the same. Therefore, the foreground can be prevented from occurring in the pixel.

Claims (21)

A first substrate and a second substrate; A plurality of pixels defined by gate lines and data lines formed on the first substrate; A switching element formed in said pixel; A common electrode and a pixel electrode disposed substantially parallel in the pixel to form a transverse electric field; A common line disposed in the pixel and electrically connected to the common electrode; A pixel electrode line disposed in the pixel and electrically connected to the pixel electrode; A protruding region protruding from an end of the common electrode along an extension direction of the gate line; And Consists of a chamfering region formed on the connection portion of the pixel electrode and the pixel electrode line, The protruding region and the chamfering region are formed to face each other such that an electric field forms an equipotential surface between the protruding region of the common electrode and the chamfering region of the pixel electrode and the pixel electrode line, and the length t of the protruding region is d / 4. ≤ t ≤ 3d / 4, where d is the gap between the common electrode and the pixel electrode. delete delete delete delete delete delete delete delete The transverse electric field mode liquid crystal display device of claim 1, wherein the common electrode and the pixel electrode are bent at least once to form a plurality of domains in which pixels have different viewing angles. delete The method of claim 1, wherein the switching device, A gate electrode formed on the first substrate; A gate insulating layer formed on the gate electrode; A semiconductor layer formed on the gate insulating layer; A source electrode and a drain electrode formed on the semiconductor layer; And And a protective layer formed on the source electrode and the drain electrode. The transverse electric field mode liquid crystal display device of claim 12, wherein the common electrode is formed on a protective layer. The transverse electric field mode liquid crystal display device of claim 13, wherein the common electrode is made of a transparent conductive material. The transverse electric field mode liquid crystal display device of claim 12, wherein the pixel electrode is formed on a passivation layer. The transverse electric field mode liquid crystal display device of claim 15, wherein the pixel electrode is made of a transparent conductive material. The transverse electric field mode liquid crystal display device of claim 12, wherein the common line is formed on a first substrate. The transverse electric field mode liquid crystal display device of claim 17, wherein the common line is connected to the common electrode through contact holes formed in the gate insulating layer and the protective layer. The transverse electric field mode liquid crystal display device of claim 12, wherein the pixel electrode line is formed on a gate insulating layer. The transverse electric field mode liquid crystal display device of claim 19, wherein the pixel electrode line is connected to the pixel electrode through a contact hole formed in the protective layer. The method of claim 1, A black matrix formed on the second substrate; And The transverse electric field mode liquid crystal display device further comprising a color filter layer formed on the second substrate to implement color.

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