KR101344874B1 - Liquid crystal display - Google Patents

Abstract

A liquid crystal display device having an improved light transmittance is provided. The liquid crystal display device is a pixel electrode formed on a first insulating substrate and a plurality of domains formed on the first insulating substrate and connected to each other by a connection pattern, and each of the domains includes a plurality of fine particles arranged substantially side by side in a constant direction. A pixel electrode made of an electrode, a second insulating substrate facing the first insulating substrate, a common electrode formed on the second insulating substrate and not patterned, and a liquid crystal layer interposed between the first and second insulating substrates; However, the connection pattern is made of a zigzag shape.

Connection pattern, fine electrode, light transmittance

Description

[0001] Liquid crystal display [0002]

1 is a layout view of a thin film transistor array panel included in a liquid crystal display according to a first exemplary embodiment of the present invention.

FIG. 2 is a cross-sectional view of a liquid crystal display including a thin film transistor array panel taken along line AA ′ of the thin film transistor array panel of FIG. 1.

3 is an enlarged view of a portion B in Fig.

4A and 4B are photographs showing the texture generation degree of the liquid crystal display according to the first exemplary embodiment of the present invention in comparison with a comparative example.

5 is a layout view of a thin film transistor array panel included in a liquid crystal display according to a modification of the first exemplary embodiment of the present invention.

FIG. 6 is an enlarged view of a portion C of FIG. 5.

FIG. 7 is a perspective view of a liquid crystal display according to a modification of the first exemplary embodiment including a portion C of FIG. 5.

8 is a layout view of a thin film transistor array panel included in a liquid crystal display according to a second exemplary embodiment of the present invention.

9 is an enlarged view of a portion D of FIG. 8.

10 is a layout view of a thin film transistor array panel included in a liquid crystal display according to a modification of the second exemplary embodiment of the present invention.

FIG. 11 is an enlarged view of a portion E of FIG. 10.

<Description of the symbols for the main parts of the drawings>

10: first insulating substrate 22: gate line

26: gate electrode 28: storage wiring

30: Gate insulating film 40: Semiconductor layer

55, 56: ohmic contact layer 62: data line

65: source electrode 66: drain electrode

70: shield 76: contact hole

82: pixel electrode

82_1, 82'_1, 84_1, 84'_1: first fine electrode

82_2, 82'_2, 84_2, 84'_2: second fine electrode

82_3, 82'_3, 84_3, 84'_3: third fine electrode

82_4, 82'_4, 84_4, 84'_4: fourth fine electrode

83: fine slit

83_1, 83'_1, 85_1, 85'_1: first fine slit

83_2, 83'_2, 85_2, 85'_2: second fine slit

83_3, 83'_3, 85_3, 85'_3: third fine slit

83_4, 83'_4, 85_4, 85'_4: fourth fine slit

92, 152: vertical alignment layer 95, 95 'connection pattern

96_1, 96'_1: first connection pattern 96_2, 96'_2: second connection pattern

96_3, 96'_3: third connection pattern 96_4, 96'_4: fourth connection pattern

100: thin film transistor array panel 110: second insulating substrate

120: black matrix 130: color filter

135: overcoat layer 140: common electrode

182_1, 182'_1: first domain 182_2, 182'_2: second domain

182_3, 182'_3: third domain 182_4, 182'_4: fourth domain

200: common electrode display panel 300: liquid crystal layer

310: liquid crystal

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device having improved light transmittance.

The liquid crystal display is one of the most widely used flat panel display devices. The liquid crystal display includes two substrates on which a field generating electrode such as a pixel electrode and a common electrode are formed, and a liquid crystal layer interposed therebetween. Is applied to generate an electric field in the liquid crystal layer, thereby determining the orientation of the liquid crystal in the liquid crystal layer and controlling the polarization of incident light to display an image.

Among them, the vertical alignment mode liquid crystal display in which the long axis of the liquid crystal is arranged perpendicular to the upper and lower substrates without an electric field applied to the display device has a high contrast ratio and easy to implement a wide reference viewing angle. Vertical alignment mode As a means for implementing a wide viewing angle in a liquid crystal display, there are a method of forming a gap in the field generating electrode and a method of forming a protrusion on the field generating electrode.

The liquid crystal display device having a gap includes a patterned vertical alignment (PVA) mode liquid crystal display device having a gap on both upper and lower substrates, and a patternless VA (patternless) in which a fine pattern is formed only on the lower substrate and no pattern is formed on the upper substrate. VA mode liquid crystal display devices, and the like, and there is an increasing demand for a patternless VA mode liquid crystal display device which is advantageous in preventing static electricity and does not cause an alignment miss.

However, the patternless VA mode liquid crystal display also has a problem in that a texture is generated at a point where the fine electrodes meet each other, thereby lowering light transmittance.

Therefore, it is necessary to reduce the texture generation portion of the liquid crystal display to improve the light transmittance.

An object of the present invention is to provide a liquid crystal display device having improved light transmittance.

Technical problems of the present invention are not limited to the above-mentioned technical problems, other technical problems not mentioned will be clearly understood by those skilled in the art from the following description.

According to an exemplary embodiment of the present invention, a liquid crystal display device includes a first insulating substrate, a pixel electrode including a plurality of domains on the first insulating substrate, and a first insulating substrate. A second insulating substrate facing each other, a common electrode formed on the second insulating substrate and not patterned, and a liquid crystal layer interposed between the first and second insulating substrates, wherein the pixel electrode is constant for each domain. And a plurality of micro electrodes arranged substantially parallel to each other in a direction, and a connection pattern connecting the micro electrodes, wherein the connection patterns have a zigzag shape.

According to another aspect of the present invention, there is provided a liquid crystal display device including a first insulating substrate and first and second electrodes formed on the first insulating substrate and arranged substantially in parallel in a first direction. A pixel electrode comprising a connection pattern and a plurality of first and second micro electrodes arranged in a second direction and connected to the first and second connection patterns, respectively, wherein the plurality of first and second micro electrodes are substantially Interposed between the pixel electrodes arranged side by side, a second insulating substrate facing the first insulating substrate, a common electrode formed on the second insulating substrate and not patterned, and the first and second insulating substrates. Including a liquid crystal layer, the first and second fine electrodes are alternately disposed.

According to another aspect of the present invention, a liquid crystal display device includes a first insulating substrate, a gate line formed on the first insulating substrate, a data line crossing the gate line, and the first insulating layer. A pixel electrode formed on the substrate and including a plurality of domains, a second insulating substrate facing the first insulating substrate, a common electrode formed on the second insulating substrate and not patterned, and the first And a liquid crystal layer interposed between a second insulating substrate, wherein the pixel electrode is formed in a first direction and is arranged in substantially parallel with the first microelectrode and is formed in a second direction and is arranged substantially in parallel with the second electrode. It includes, wherein the first fine electrode and the second fine electrode are formed to cross each other.

The details of other embodiments are included in the detailed description and drawings.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments and modifications described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments and modifications disclosed below, but may be embodied in various different forms, and only the embodiments and modifications are provided to make the disclosure of the present invention complete and to which the present invention pertains. It is provided to fully inform the person skilled in the art the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

It is to be understood that when an element or layer is referred to as being "on" or " on "of another element or layer, All included. On the other hand, when a device is referred to as "directly on" or "directly on" indicates that no device or layer is intervened in the middle.

The terms spatially relative, "below", "beneath", "lower", "above", "upper" May be used to readily describe a device or a relationship of components to other devices or components. Spatially relative terms should be understood to include, in addition to the orientation shown in the drawings, terms that include different orientations of the device during use or operation.

Hereinafter, a liquid crystal display according to a first exemplary embodiment of the present invention will be described with reference to FIGS. 1 to 4B. 1 is a layout view of a thin film transistor array panel included in a liquid crystal display according to a first exemplary embodiment of the present invention. FIG. 2 is a cross-sectional view of a liquid crystal display including a thin film transistor array panel taken along line AA ′ of the thin film transistor array panel of FIG. 1.

The liquid crystal display according to the present exemplary embodiment includes a thin film transistor array panel 100 and a common electrode panel 200 disposed to face each other, and a liquid crystal layer 300 interposed between the two display panels 100 and 200.

First, referring to FIGS. 1 and 2, the thin film transistor array panel 100 included in the liquid crystal display of the present embodiment is formed on the first insulating substrate 10 and connected to each other by the connection pattern 95. Many elements, such as the electrode 82, are included. The pixel electrode 82 is divided into a plurality of domains 182_1, 182_2, 182_3, and 182_4, and each of the plurality of microelectrodes 82_1 and substantially arranged side by side in a predetermined direction for each domain 182_1, 182_2, 182_3, and 182_4. The pixel electrode 82 which consists of 82_2, 82_3, and 82_4 is formed.

Both the color filter 130 and the pixel electrode 82 may be formed in the thin film transistor array panel 100 included in the liquid crystal display of the present exemplary embodiment. The liquid crystal display according to the present exemplary embodiment has an array on color filter (AOC) structure in which a thin film transistor array such as a gate wiring is formed on the color filter 130, or a color filter on in which the color filter 130 is formed on the thin film transistor array. Array) structure, but will be described taking an AOC structure as an example.

In the thin film transistor array panel 100 of the AOC structure liquid crystal display, a black matrix 120 defining a pixel region is formed directly on the first insulating substrate 10. The black matrix 120 may be made of an opaque material such as chromium (Cr), for example, and serves to improve light quality by preventing light leakage. The black matrix 120 may be formed to overlap the gate and / or data line to maximize the aperture ratio.

Red, green, and blue color filters 130 are sequentially arranged in the pixel area defined by the black matrix 120. These color filters 130 serve to pass only light of a specific wavelength band.

The color filter 130 may be formed of a photosensitive organic material, for example, a photoresist. These color filters 130 may be formed to have the same thickness or may have a predetermined step.

An overcoat layer 135 may be formed on the color filter 130 to planarize these steps.

The gate line 22 is formed in the horizontal direction, for example on the overcoat layer 135, and the gate electrode 26 formed in the form of a processus | protrusion is formed in the gate line 22. As shown in FIG. These gate lines 22 and gate electrodes 26 are referred to as gate wirings.

In addition, the storage wiring 28 is formed on the first insulating substrate 10 and extends in the horizontal direction substantially in parallel with the gate line 22. The storage wiring 28 is formed to overlap a part of the pixel electrode 82 to be described later in the pixel. In the present embodiment illustrated in FIG. 1, the storage wiring 28 is disposed at the center of the pixel. However, the present invention is not limited thereto, and the storage wiring 28 overlaps the pixel electrode 82 so that a constant storage capacitance is obtained. The shape and arrangement of the storage wiring 28 may be modified in various forms within a range that satisfies the conditions for forming the).

The gate wirings 22 and 26 and the storage wiring 28 include aluminum-based metals such as aluminum (Al) and aluminum alloys, silver-based metals such as silver (Ag) and silver alloys, and copper-based metals such as copper (Cu) and copper alloys. Metal, molybdenum (Mo) and molybdenum alloys such as molybdenum-based metal, it may be made of chromium (Cr), titanium (Ti), tantalum (Ta). In addition, the gate lines 22 and 26 and the storage line 28 may have a multilayer structure including two conductive layers (not shown) having different physical properties. One of the conductive films has a low resistivity metal such as aluminum-based metal, silver-based metal, or copper-based metal so as to reduce signal delay or voltage drop in the gate wirings 22 and 26 and storage wiring 28. And so on. In contrast, the other conductive layer is made of a material having excellent contact properties with other materials, particularly indium tin oxide (ITO) and indium zinc oxide (IZO), such as molybdenum-based metals, chromium, titanium, tantalum and the like. A good example of such a combination is a chromium bottom film, an aluminum top film, an aluminum bottom film and a molybdenum top film. However, the present invention is not limited thereto, and the gate wirings 22 and 26 and the storage wiring 28 may be made of various metals and conductors.

A gate insulating film 30 made of silicon nitride (SiNx), silicon oxide, or the like is formed on the gate wirings 22 and 26 and the storage wiring 28.

On the gate insulating film 30, a semiconductor layer 40 made of hydrogenated amorphous silicon, polycrystalline silicon, or the like is formed. The semiconductor layer 40 may have various shapes such as an island shape and a linear shape. For example, the semiconductor layer 40 may be formed in an island shape on the gate electrode 26 as shown in FIG. 1. In addition, in another embodiment of the present invention, when the semiconductor layer is linearly formed, the semiconductor layer may be positioned below the data line 62 and extend to the upper portion of the gate electrode 26.

On the semiconductor layer 40, ohmic contact layers 55 and 56 made of a material such as n + hydrogenated amorphous silicon doped with a high concentration of silicide or n-type impurities are formed. The ohmic contact layers 55 and 56 may have various shapes such as an island shape and a linear shape. For example, when the ohmic contact layers 55 and 56 have island shapes, the ohmic contact layers 55 and 56 may be island shapes. 56 may be located under the drain electrode 66 and the source electrode 65. In addition, in another embodiment of the present invention, when the ohmic contact layer is linear, the ohmic contact layer may be formed to extend below the data line 62.

The data line 62 and the drain electrode 66 are formed on the ohmic contact layers 55 and 56 and the gate insulating layer 30. The data line 62 extends in a second direction, for example, a vertical direction, and crosses the gate line 22 to define a pixel. A source electrode 65 extending from the data line 62 to the top of the semiconductor layer 40 in the form of a branch is formed. The drain electrode 66 is separated from the source electrode 65 and positioned above the semiconductor layer 40 so as to face the source electrode 65 with respect to the gate electrode 26. The drain electrode 66 includes a rod-shaped pattern disposed on the semiconductor layer 40 and an extension pattern extending from the rod-shaped pattern and having a large area and in which the contact hole 76 is located.

Such data line 62, source electrode 65 and drain electrode 66 are referred to as data wirings.

The data lines 62, 65, and 66 are preferably made of refractory metals such as chromium, molybdenum-based metals, tantalum, and titanium, and include a lower layer (not shown) such as a refractory metal and an upper layer of low resistance material (not shown). It may have a multilayer film structure consisting of a). Examples of the multilayer structure include a triple layer of a molybdenum film-aluminum film-molybdenum film in addition to the chromium lower film and the aluminum upper film or the aluminum lower film and the molybdenum upper film.

The source electrode 65 overlaps with the semiconductor layer 40 at least partially and the drain electrode 66 faces the source electrode 65 about the gate electrode 26 and overlaps with the semiconductor layer 40 at least partially do. Here, the ohmic contact layers 55 and 56 are interposed between the semiconductor layer 40, the source electrode 65, and the semiconductor layer 40 and the drain electrode 66 to lower contact resistance therebetween.

A passivation layer 70 made of an insulating layer is formed on the data line 62, the drain electrode 66, and the exposed semiconductor layer 40. Here, the protective layer 70 may be formed of an inorganic material such as silicon nitride or silicon oxide, an organic material having excellent planarization characteristics and photosensitivity, or an a-Si: C: O (silicon oxide) film formed by plasma enhanced chemical vapor deposition (PECVD) , a-Si: O: F, or the like. In addition, the protective layer 70 may have a bilayer structure of a lower inorganic layer and an upper organic layer to protect the exposed semiconductor layer 40 while taking advantage of the excellent characteristics of the organic layer.

In the passivation layer 70, a contact hole 76 exposing the drain electrode 66 is formed.

The pixel electrode 82 electrically connected to the drain electrode 66 is formed on the passivation layer 70 through the contact hole 76 for each pixel. That is, the pixel electrode 82 is physically and electrically connected to the drain electrode 66 through the contact hole 76 to receive a data voltage from the drain electrode 66. The pixel electrode 82 is made of a transparent conductor such as indium tin oxide (ITO) or indium zinc oxide (IZO).

1 to 4B, the characteristics of the pixel electrode of this embodiment will be described in detail. 3 is an enlarged view of a portion B in Fig.

First, referring to FIGS. 1 to 3, the pixel electrode 82 is divided into a plurality of domains 182_1, 182_2, 182_3, and 182_4 connected to each other by the connection pattern 95. Each domain 182_1, 182_2, 182_3, 182_4 is composed of a plurality of fine electrodes 82_1, 82_2, 82_3, 82_4 arranged substantially side by side in a predetermined direction, and a plurality of fine electrodes 82_1, 82_2, 82_3, 82_4 The fine slits 83 are disposed between the holes. The fine electrodes 82_1, 82_2, 82_3 and 82_4 and the fine slits 83_1, 83_2, 83_3 and 83_4 are alternately arranged.

The pixel electrode 82 of the present embodiment may be divided into, for example, four domains 182_1, 182_2, 182_3, and 182_4 that divide into four pixel electrodes 82. The fine electrodes 82_1, 82_2, 82_3 and 82_4 may have a bar shape that is elongated in a predetermined direction in each of the domains 182_1, 182_2, 182_3 and 182_4. In each domain 182_1, 182_2, 182_3, and 182_4, fine slits 83_1 and 83_2 disposed between the plurality of fine electrodes 82_1, 82_2, 82_3 and 82_4, and the fine electrodes 82_1, 82_2, 82_3 and 82_4. , 83_3, 83_4) are formed. The fine electrodes 82_1, 82_2, 82_3 and 82_4 and the fine slits 83_1, 83_2, 83_3 and 83_4 are alternately disposed, and the fine electrodes 82_1, 82_2, 82_3 and 82_4 and the fine slits 83_1, 83_2 and 83_3 are alternately arranged. , 83_4) may be equal to each other. In this case, the widths of the fine electrodes 82_1, 82_2, 82_3 and 82_4 may be 3 μm to 5 μm in consideration of high light transmittance and exposure sensitivity of the exposure machine forming the fine electrodes 82_1, 82_2, 82_3 and 82_4. The fine electrodes 82_1, 82_2, 82_3, and 82_4 of the present embodiment may all have a constant width from the center of the pixel electrode 82 to the edge. The fine electrodes 82_1, 82_2, 82_3 and 82_4 and the fine slits 83_1, 83_2, 83_3 and 83_4 are arranged side by side in one direction in one domain 182_1, 182_2, 182_3 and 182_4, and different domains 182_1, The arrangement directions of the fine electrodes 82_1, 82_2, 82_3, and 82_4 formed in the 182_2, 182_3, and 182_4 are different from each other.

In detail, the first domain 182_1 may be positioned at, for example, a quadrant of the quadrant that divides the pixel electrode 82 into four quadrants. The first domain 182_1 includes a plurality of first fine electrodes 82_1 arranged side by side in the first direction. The first direction may be substantially 45 ° with respect to the polarization axis of the polarizer (not shown) formed on the first insulating substrate 10. The first fine slits 83_1 are disposed between the plurality of first fine electrodes 82_1 formed in the first domain 182_1 in the first direction. The first fine electrodes 82_1 and the first fine slits 83_1 are alternately arranged to form an electric field with the common electrode 140 to be described later. The liquid crystal 310 is tilted along the direction of the electric field formed in the first fine electrode 82_1 and the first fine slit 83_1 and the common electrode 140 to collide with each other, and as a result, the pixel electrode 82 Oriented in the central direction. That is, the alignment direction of the liquid crystal 310 in the first domain 182_1 may be substantially 45 ° with respect to the polarization axis of the polarizer (not shown) formed on the first insulating substrate 10.

For example, the second domain 182_2 may be positioned in quadrants of the left and upper directions among the quadrants that divide the pixel electrode 82 into four quadrants. The second domain 182_2 includes a plurality of second fine electrodes 82_2 arranged side by side in the second direction. The second direction may be substantially perpendicular to the first direction, and may be substantially 135 ° with respect to the polarization axis of the polarizer (not shown) formed on the first insulating substrate 10. The second fine slits 83_2 are disposed between the plurality of second fine electrodes 82_2 formed in the second domain 182_2 in the second direction. The liquid crystal 310 is oriented in the direction of the center of the pixel electrode 82 by an electric field formed in the second fine electrode 82_2, the second fine slit 83_2, and the common electrode 140. That is, the alignment direction of the liquid crystal 310 in the second domain 182_2 may be substantially 135 ° with respect to the polarization axis of the polarizer (not shown) formed on the first insulating substrate 10.

The first domain 182_1 and the second domain 182_2 which are adjacent to each other are connected to each other by a connection pattern 95 which is an extension of the first and second fine electrodes 84_1 and 84_2. In detail, the connection pattern 95 may have an zigzag shape in which the extension of the first fine electrode 82_1 and the extension of the second fine electrode 82_2 are alternately disposed. That is, the first fine electrode 82_1 and the second fine electrode 82_2 may be alternately formed. The connection pattern 95 has substantially the same width as the first and second fine electrodes 82_1 and 82_2. The alignment direction of the liquid crystal 310 of the first domain 182_1 and the alignment direction of the liquid crystal 310 of the second domain 182_2 are 90 ° with each other, and the alignment direction of the first domain 182_1 and the second domain 182_2 is different from each other. In the adjacent region S, the liquid crystals 310 may collide with each other to generate a texture. Accordingly, the light transmittance of the liquid crystal display can be reduced. However, in the liquid crystal display of the present embodiment, the width of the connection pattern 95 is very narrow to 3 to 5 μm, which is the same as that of the first and second fine electrodes 82_2. The portion where the texture occurs is narrow, and the texture is formed uniformly.

4A and 4B, the texture generated in the liquid crystal display including the pixel electrode of the present embodiment is compared with the liquid crystal display including the pixel electrode of another structure. 4A and 4B are photographs showing the texture generation degree of the liquid crystal display according to the first exemplary embodiment of the present invention in comparison with a comparative example.

Referring to FIG. 4A, a liquid crystal display including a cross-shaped connection pattern that divides a pixel region into four parts and a microelectrode branched in four directions therefrom is wide in the vicinity of the wide cross-shaped connection pattern S ′. It can be seen that a non-uniform texture is formed. In contrast, the liquid crystal display of the present exemplary embodiment does not include a cross-shaped connection pattern, and the first and second domains are connected by a narrow connection pattern, so that the texture forming region S is narrow and the texture is not. It can be confirmed that it is formed uniformly. That is, in the liquid crystal display of the present embodiment, the texture is reduced, and thus, the light transmittance may be improved because the texture generating portion does not need to be blocked by another metal electrode.

Referring back to FIGS. 1 through 3, the first display panel 100 may further include a third domain 182_3 and a fourth domain 182_4 under the pixel electrode 82 of the present embodiment.

For example, the third domain 182_3 may be positioned in quadrants of the left and the bottom of quadrants that divide the pixel electrode 82 into four quadrants. The third domain 182_3 includes a plurality of third fine electrodes 82_3 arranged side by side in the third direction. The third direction may be substantially perpendicular to the second direction, and may be substantially 225 ° with respect to the polarization axis of the polarizer (not shown) formed on the first insulating substrate 10. The third fine slits 83_3 are disposed between the plurality of third fine electrodes 82_3 formed in the third domain 182_3 in the third direction. The alignment direction of the liquid crystal 310 in the third domain 182_3 may be substantially 225 ° with respect to the polarization axis of the polarizer (not shown) formed on the first insulating substrate 10. The second domain 182_2 and the third domain 182_3 are connected to each other by a connection pattern 95 which is an extension of the second fine electrode 82_2 and the third fine electrode 82_3.

For example, the fourth domain 182_4 may be positioned at the right quadrant of the quadrant which divides the pixel electrode 82 into four quadrants. The fourth domain 182_4 includes a plurality of fourth fine electrodes 82_4 arranged side by side in the fourth direction. The fourth direction may be substantially perpendicular to the third direction and the first direction, and may be substantially 315 ° with respect to the polarization axis of the polarizer (not shown) formed on the first insulating substrate 10. The fourth fine slits 83_4 are disposed between the plurality of fourth fine electrodes 82_4 formed in the fourth domain 182_4 in the fourth direction. The alignment direction of the liquid crystal 310 in the fourth domain 182_4 may be substantially 315 ° with respect to the polarization axis of the polarizer (not shown) formed on the first insulating substrate 10. The third domain 182_3 and the fourth domain 182_4 are connected to each other by a connection pattern 95 which is an extension of the third fine electrode 82_3 and the fourth fine electrode 82_4, and the fourth domain 182_4. The first domain 182_1 is connected to each other by a connection pattern 95 which is an extension of the fourth fine electrode 82_4 and the first fine electrode 82_1. As a result, the four domains 182_1, 182_2, 182_3, and 182_4 are all connected by the connection pattern 95, and textures are narrow and uniformly formed at the connection sites of the respective domains 182_1, 182_2, 182_3, and 182_4. This is improved.

A first vertical alignment layer 92 may be formed on the pixel electrode 82 and the passivation layer 70 of the present exemplary embodiment to align the liquid crystals. The first vertical alignment layer 92 orients the liquid crystals 310 vertically together with the second vertical alignment layer 152. Accordingly, when the driving voltage is not applied to the liquid crystal display, a clear black color is implemented in the liquid crystal display. The first vertical alignment layer 92 may be formed of a material including, for example, polyimide as a main chain and a side chain.

A polarizing plate (not shown) may be formed on the first insulating substrate 10. In more detail, the polarizer may be formed on the first insulating substrate 10 opposite to the pixel electrode 82. The polarization axes of the polarizing plates formed on the first insulating substrate 10 are perpendicular to the polarization axes of the polarizing plates formed on the second insulating substrate (see 110 in FIG. 2).

Referring back to FIG. 2, the common electrode panel 200 includes a common electrode 140 formed on the second insulating substrate 110 and not patterned, and is disposed to face the thin film transistor array panel 100. The common electrode 140 of this embodiment is not patterned. Since the process for patterning the common electrode 140 is not required for the common electrode display panel 200 according to the present exemplary embodiment, misalignment may be prevented from occurring when the thin film transistor array panel 100 and the common electrode display panel 200 are assembled. It does not need to be anti-static treatment, the transmittance is high and the manufacturing cost can be reduced.

A second vertical alignment layer 152 that vertically aligns the liquid crystals 310 is formed on the common electrode 140. A spacer may be interposed between the thin film transistor array panel 100 and the common electrode panel 200 to maintain a cell gap, which is a gap between the two display panels.

On the second insulation substrate 110, a polarizer may be disposed on an opposite surface on which the common electrode 140 is formed, which is perpendicular to the polarization axis of the polarizer formed on the first insulating substrate 10.

The liquid crystal layer 300 formed from the liquid crystal 310, the UV curable monomer, and the UV curing initiator is interposed between the thin film transistor array panel 100 and the common electrode display panel 200 facing each other.

The liquid crystal 310 included in the liquid crystal layer 300 may have negative dielectric anisotropy, and may be, for example, the nematic liquid crystal 310. The UV curable monomer may be, for example, an acrylate-based monomer, the initiator for UV curing may be made of a material that can be absorbed in the UV region.

The liquid crystal 310 included in the liquid crystal layer 300 as described above is pretilted to form an angle of, for example, 88 to 90 ° with the thin film transistor array panel 100 by UV irradiation, thereby connecting the connection pattern 95. To the side.

A backlight assembly including a lamp is disposed under the thin film transistor array panel 100, the common electrode display panel 200, and the liquid crystal layer 300 interposed therebetween.

Hereinafter, a liquid crystal display according to a modification of the first embodiment of the present invention will be described in detail with reference to FIGS. 5 to 7. 5 is a layout view of a thin film transistor array panel included in a liquid crystal display according to a modification of the first exemplary embodiment of the present invention. FIG. 6 is an enlarged view of a portion C of FIG. 5. In the following embodiments and modifications, the same reference numerals are used for the same elements as those of the first embodiment of the present invention for convenience of description, and the description thereof is omitted or simplified.

In the liquid crystal display of the present modified example, the widths of the fine electrodes 82'_1, 82'_2, 82'_3, and 82'_4 become narrower from the connection pattern 95 '. As a result, the width of the fine slit 83 'becomes wider as it moves away from the connection pattern 95' side.

In the fine electrodes 82'_1, 82'_2, 82'_3, and 82'_4 of the present modification, the width W ₂ on the side of the connection pattern 95 'is larger than the width W ₁ near the edge of the pixel region. wide. The fine slits 83'_1, 83'_2, 83'_3, and 83'_4 are alternately disposed with the fine electrodes 82'_1, 82'_2, 82'_3, and 82'_4 to form edges of the pixel area. It gets wider. Accordingly, the liquid crystal (see 310 of FIG. 7) can be easily oriented to the connection pattern 95 ′ to improve the response speed.

Hereinafter, the widths W ₁ and W _{2 of the} fine electrodes 82'_1, 82'_2, 82'_3 and 82'_4 and the alignment directions of the liquid crystal 310 will be described in detail with reference to FIG. 7. FIG. 7 is a perspective view of a liquid crystal display according to a modification of the first exemplary embodiment including a portion C of FIG. 5.

The lateral electric field (XY direction) generated by the vertical direction (Z-axis direction) electric field formed between the common electrode 140 and the first fine electrode 82'_1 and the shape of the first fine electrode 82'_1 is formed. Considering the movement of the vertically disposed liquid crystal 310 as follows. The liquid crystal 310 positioned on the upper side 82'_1a of the first microelectrode 82'_1 is inclined in the Y direction, and the upper side of the first side electrode 82'_1b of the first microelectrode 82'_1b. The liquid crystal 310 positioned at is inclined in the X-Y direction, and the liquid crystal 310 positioned at the upper side of the second side edge 82'_1c of the first fine electrode 82'_1 is (-X) -Y direction. Inclined to Here, the forces in the X direction and the (-X) direction cancel each other so that the liquid crystal 310 positioned on the first microelectrode 82'_1 is inclined toward the Y direction, that is, the connection pattern 95 '. In addition, the liquid crystal 310 formed on the first fine slit 83'_1 also tilts toward the Y direction, that is, the connection pattern 95 ', along the alignment direction of the liquid crystal 310 on the first fine electrode 82'_1. Lose. As the width of the first fine electrode 82 ′ _1 decreases as the distance from the connection pattern 95 ′ increases, the force to align the liquid crystal 310 toward the connection pattern 95 ′ becomes stronger. The response speed of the display device is increased.

Hereinafter, the liquid crystal display according to the second exemplary embodiment of the present invention will be described in detail with reference to FIGS. 8 and 9. 8 is a layout view of a thin film transistor array panel included in a liquid crystal display according to a second exemplary embodiment of the present invention. 9 is an enlarged view of a portion D of FIG. 8.

8 and 9, the pixel electrode 84 may include a first connection pattern 96_1 and a first connection pattern 96_1 that are substantially parallel to each other in a first direction on a top surface of a bisection that bisects the pixel electrode 84 horizontally. Two connection patterns 96_2. The first connection pattern 96_1 and the second connection pattern 96_2 may be alternately arranged alternately.

Similar to the liquid crystal display of the first embodiment of the present invention, the liquid crystal display of the present exemplary embodiment may have an AOC structure including both a pixel electrode 84 and a color filter (not shown) on the first insulating substrate 10. Hereinafter, the structure of the pixel electrode 84 and the alignment direction of the liquid crystal of the first insulating substrate 10 which are different from the present embodiment and the first embodiment of the present invention will be described.

A plurality of first fine electrodes 84_1 substantially arranged side by side in the second direction are connected to the first connection pattern 96_1, and a plurality of first fine electrodes 84_1 arranged substantially side by side in the second direction are connected to the first connection pattern 96_1. The second fine electrode 84_2 is connected. Here, the first direction and the second direction may be substantially perpendicular. Specifically, the first direction is substantially 45 ° with respect to the polarization axis of the polarizing plate formed on the first insulating substrate 10. In this case, the liquid crystals (not shown) are oriented toward the first connection pattern 96_1 in parallel with the arrangement direction of the first fine electrode 84_1 to face each other with respect to the first connection pattern 96_1. In addition, the second direction may be substantially 135 ° with respect to the polarization axis of the polarizing plate formed on the first insulating substrate 10. In this case, the liquid crystals are oriented toward the second connection pattern 96_2 in parallel with the array direction of the second fine electrodes 84_2 to face each other. That is, the alignment directions of the liquid crystals are opposite to each other in a portion where the first fine electrode 84_1 and the second fine electrode 84_2 are adjacent to each other. The width W ₃ of the first fine electrode 84_1 and the second fine electrode 84_2 may be 3 to 5 μm, and the first fine slit 85_1 is disposed between the adjacent first fine electrodes 84_1. The first fine electrodes 84_1 and the first fine slits 85_1 may be alternately disposed. The second fine slits 85_2 may be disposed between the adjacent second fine electrodes 84_2, and the second fine electrodes 84_2 and the second fine slits 85_2 may be alternately disposed. The widths of the first fine electrodes 84_1 and the first fine slits 85_1 may be substantially the same. The widths of the second fine electrodes 84_2 and the second fine slits 85_2 may also be substantially the same.

The first fine electrode 84_1 is bidirectionally branched around the first connection pattern 96_1, and the second fine electrode 84_2 is bidirectionally branched around the second connection pattern 96_2. The first fine electrode 84_1 and the second fine electrode 84_2 are alternately disposed. That is, the first fine electrodes 84_1 and the second fine electrodes 84_2 are alternately disposed without being present on a straight line. More specifically, one end of the first fine electrode 84_1 is located in line with the second fine slit 85_2, and one end of the second fine electrode 84_2 is in line with the first fine slit 85_1. Located in In this case, the first fine electrode 84_1 and the second fine electrode 84_2 are opposed to each other at substantially 3 to 5 μm apart. That is, the first fine electrode 84_1 is spaced 3 to 5 μm from an extension line of one end of the second fine slit 85_2. The texture may occur as the liquid crystal is oriented in opposite directions from adjacent positions of the first fine electrode 84_1 and the second fine electrode 84_2, but the first fine electrode 84_1 and the second fine electrode 84_2 By staggering with each other, the abnormal behavior of the liquid crystal when the driving voltage is applied may reduce the texture. Accordingly, it is not necessary to block the region where the texture is generated by another metal, thereby improving light transmittance of the liquid crystal display.

The pixel electrode 84 may further include a third connection pattern 96_3, a fourth connection pattern 96_4, and the like at a lower portion of the bisection that bisects the pixel electrode 84 in the horizontal direction. That is, the pixel electrode 84 is the third connection pattern 96_3 and the fourth connection pattern 96_4 arranged substantially parallel to the second direction, and the third connection pattern 96_3 and the fourth connection arranged in the first direction. The third microelectrode 84_3 and the fourth microelectrode 84_4 may be further connected to the connection pattern 96_4, respectively, and may be substantially parallel to each other. A third fine slit 85_3 and a fourth fine slit 85_4 are disposed between each of the third fine electrodes 84_3 and the fourth fine electrodes 84_4.

The upper and lower sides of the pixel electrode 84 may be symmetrical with respect to the bisector in the horizontal direction. For example, the third microelectrode 84_3 and the fourth microelectrode 84_4 may be alternately disposed, and the separation distance between the third microelectrode 84_3 and the fourth microelectrode 84_4 may be 3 to 5 μm.

The liquid crystal layer (not shown) of this embodiment is also formed by irradiating UV to a liquid crystal, a UV curable monomer, and an initiator for UV hardening. Accordingly, the liquid crystal is pretilted toward the first connection pattern 96_1, the second connection pattern 96_2, the third connection pattern 96_3, and the fourth connection pattern 96_4.

Hereinafter, a liquid crystal display according to a modification of the second embodiment of the present invention will be described in detail with reference to FIGS. 10 and 11. 10 is a layout view of a thin film transistor array panel included in a liquid crystal display according to a modification of the second exemplary embodiment of the present invention. FIG. 11 is an enlarged view of a portion E of FIG. 10.

10 and 11, in the liquid crystal display of the present exemplary embodiment, widths of the first and second fine electrodes 84'_1 and 84'_2 are first and second connection patterns 96'_1 and 96'_2, respectively. The further away from), the narrower it is.

In the first microelectrode 84'_1 of the present modification, the width of the side of the first connection pattern 96'_1 is wider than the width of the side adjacent to the second microelectrode 84'_2. The width of the second fine electrode 84'_2 is also greater than that of the side adjacent to the first fine electrode 84'_1. Similarly, the third and fourth fine electrodes 84'_3 and 84'_4 also have widths at the sides of the third and fourth connection patterns 96'_3 and 96'_4, respectively. , 84'_3) wider than the width of the adjacent side. Fine slits 85'_1, 85'_2, 85'_3, 85'_4 are disposed alternately with the respective fine electrodes 84'_1, 84'_2, 84'_3, 84'_4, and their widths. Increases and decreases opposite to the widths of the fine electrodes 84'_1, 84'_2, 84'_3, 84'_4.

Accordingly, the liquid crystal is easily oriented toward the first to fourth connection patterns 96'_1, 96'_2, 96'_3, and 96'_4, thereby improving a response speed. The widths of the first to fourth fine electrodes 84'_1, 84'_2, 84'_3, and 84'_4 are the first to fourth connection patterns 96'_1, 96'_2, 96'_3, and 96 '. The phenomenon that the liquid crystal is oriented toward the wide side of the first to fourth fine electrodes 84'_1, 84'_2, 84'_3, and 84'_4 as the narrower the further away from _4) is the first embodiment of the present invention. It is as demonstrated in the modification of the example.

Although the embodiments and modifications of the present invention have been described above with reference to the accompanying drawings, the present invention is not limited to the above embodiments and modifications, but may be manufactured in various different forms. Those skilled in the art will appreciate that it can be implemented in other specific forms without changing the technical spirit or essential features of the present invention. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

As described above, according to the liquid crystal display according to the embodiments and modifications of the present invention, there are one or more of the following effects.

First, by narrowing the width of the pixel electrode where the domains cross, it is possible to reduce the generation of texture and to improve the light transmittance.

Second, the micro electrodes may be staggered to reduce the occurrence of texture.

Third, the response speed of the liquid crystal may be improved by adjusting the width of the fine electrode.

Claims (23)

A first substrate; A pixel electrode formed on the first substrate and including a plurality of domains; A second substrate facing the first substrate; A common electrode formed on the second substrate and not patterned; And A liquid crystal layer interposed between the first and second substrates, The pixel electrode further includes a plurality of micro electrodes arranged side by side in a predetermined direction for each domain and a connection pattern connecting the micro electrodes. The connection pattern includes a zigzag pattern. The method according to claim 1, The connection pattern may include an extension part of each micro electrode in the domain adjacent to each other. 3. The method of claim 2, The connection pattern has the same width as the fine electrode. The method according to claim 1, The microelectrode may include a first microelectrode arranged in a first direction in a first domain, and a second microelectrode arranged in a second direction in a second domain adjacent to the first domain, wherein the connection pattern may include: An extension part of the first fine electrode and the extension part of the second fine electrode are alternately arranged. 5. The method of claim 4, The liquid crystal display device wherein the first direction and the second direction are perpendicular to each other. The method according to claim 1, The width of the fine electrode is the same as the width of the fine slit alternately arranged with the fine electrode. The method according to claim 6, The width of the fine electrode is a liquid crystal display device of 3 ~ 5㎛. The method according to claim 1, The width of the fine electrode is narrower as the distance from the connection pattern. The method according to claim 1, The pixel electrode is divided into four domains. The method of claim 9, And a pair of polarizing plates formed on the first substrate and the second substrate, respectively, wherein the polarization axes of the pair of polarizing plates are perpendicular to each other, and the fine electrodes are formed with respect to the polarization axes of the polarizing plates formed on the first substrate. A liquid crystal display comprising 45 °, 135 °, 225 °, and 315 ° for each domain. The method according to claim 1, And the liquid crystal layer is formed using a liquid crystal, a UV curable monomer, and an UV curing initiator, and the liquid crystal is pretilted toward the connection pattern. The method according to claim 1, And a color filter interposed between the first substrate and the pixel electrode. A first substrate; Is formed on the first substrate, 1. A pixel electrode including first and second connection patterns arranged side by side in a first direction, and a plurality of first and second micro electrodes arranged in a second direction and connected to the first and second connection patterns, respectively. The plurality of first and second fine electrodes may each include: a pixel electrode arranged side by side; A second substrate facing the first substrate; A common electrode formed on the second substrate and not patterned; And It includes a liquid crystal layer interposed between the first and second substrate, The first and second fine electrodes are alternately disposed. 14. The method of claim 13, The distance between the first fine electrode and the second fine electrode is 3 ~ 5㎛ liquid crystal display device. 14. The method of claim 13, The liquid crystal display device wherein the first direction and the second direction are perpendicular to each other. 14. The method of claim 13, The pixel electrode may include third and fourth connection patterns arranged in parallel in the second direction, and third and fourth connection patterns arranged in the first direction and connected to the third and fourth connection patterns, respectively. A liquid crystal display further comprising four fine electrodes. 14. The method of claim 13, And a pair of polarizers respectively formed on the first substrate and the second substrate, wherein the polarization axes of the pair of polarizers are perpendicular to each other, and the first direction is the polarization axis of the polarizers formed on the first substrate. 45 degrees with respect to the second direction, wherein the second direction is 135 degrees with respect to the polarization axis of the polarizing plate formed on the first substrate. 14. The method of claim 13, The width of the first and second fine electrodes is the same as the width of the first and second fine slits disposed alternately with the first and second fine electrodes, respectively. 19. The method of claim 18, The first and second microelectrodes have a width of 3 to 5 μm. 14. The method of claim 13, The width of the first and second fine electrodes becomes narrower as the distance from the first and second connection patterns increases. 14. The method of claim 13, And the liquid crystal layer is formed using a liquid crystal, a UV curable monomer, and an UV curing initiator, and the liquid crystal is pretilted toward the first and second connection patterns. 14. The method of claim 13, And a color filter interposed between the first substrate and the pixel electrode. delete

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