KR20070013574A - Liquid crystal panel assembly and liquid crystal display having the same - Google Patents

Abstract

A liquid crystal panel assembly and a liquid crystal display including the same are provided to improve the display property of a liquid crystal display by accurately aligning a common electrode display panel and a thin film transistor display panel when the common electrode display panel and the thin film transistor display panel are bonded with each other. A common electrode display panel(134) includes a common electrode(14) and a plurality of protruded parts(1) formed along the edge of the common electrode display plate. A thin film transistor display panel(133) is arranged opposite to the common electrode display panel and includes a thin film transistor array, pixel electrodes(82), and insertion guide parts(18) having groove parts(9) where the protruded parts are inserted. A liquid crystal layer is interposed between the thin film transistor display panel and the common electrode display panel.

Description

Liquid crystal panel assembly and liquid crystal display including the same {Liquid crystal panel assembly and liquid crystal display having the same}

1 is an exploded perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention.

2 is a cross-sectional view of a liquid crystal panel assembly according to an embodiment of the present invention.

3 is a perspective view illustrating a thin film transistor array panel of the liquid crystal panel assembly of FIG. 2.

4 is a plan view illustrating a mother substrate on which a plurality of thin film transistor array panels of FIG. 2 are disposed.

(Explanation of symbols for the main parts of the drawing)

1: protrusion 2: polarizer

4: upper substrate 6: black matrix

8: color filter 9: groove

10: lower substrate 14: common electrode

12: polarizing plate 18: insertion guide portion

26 gate electrode 30 gate insulating film

40: active layer 55, 56: ohmic contact layer

65 source electrode 66 drain electrode

70: protective film 82: pixel electrode

90: liquid crystal layer 100: liquid crystal display device

110: upper storage container 112: window

130: liquid crystal panel assembly 131: gate tape carrier package

132: data tape carrier package 133: thin film transistor array panel

134: common electrode display panel 135: printed circuit board

136: liquid crystal panel 140: backlight unit

141: optical sheets 142: light guide plate

143: lamp assembly 144: reflector

160: lower storage container 230: seal pattern

400: mosquito board

The present invention relates to a liquid crystal panel assembly and a liquid crystal display device including the same, and more particularly, to a liquid crystal panel assembly and a liquid crystal including the same, when the common electrode display panel and the thin film transistor array panel of the liquid crystal panel are bonded together. It relates to a display device.

Cathode ray tube (CRT), which is one of the display devices that are generally used, is mainly used for monitors such as televisions, measuring devices, information terminal devices, etc., but due to its own weight and size, It could not actively respond to the demand for miniaturization and weight reduction.

In order to replace the cathode ray tube, it has advantages such as small size, light weight, low power consumption, and the like, and a liquid crystal display device that displays information by using the electrical and optical properties of the liquid crystal injected into the liquid crystal panel has been actively developed. Recently, it plays a role as a flat panel display device. In general, the liquid crystal display device is a display device having low power consumption, light weight, and small volume. The liquid crystal display device has been widely applied to a wide range of industries, for example, the computer industry, the electronic industry, and the telecommunication industry due to such unique advantages. As a matter of fact, the liquid crystal display device having such an advantage is applied to various fields such as a display device of a portable computer, a monitor of a desktop computer, a monitor of a high-definition video device, and the like.

The liquid crystal display is largely divided into twisted nematic (TN) and super-twisted nematic (STN) methods, and the active matrix display method using the switching element and the TN liquid crystal and the passive matrix using the STN liquid crystal due to the difference in driving method. There is a passive matrix display method.

The big difference between these two methods is that the active matrix display method is used for TFT-LCD, which drives the LCD using the TFT as a switch, and the passive matrix display method does not use transistors, thus requiring a complicated circuit. Do not LCDs using TFTs have been widely used in recent years with the spread of portable computers.

The liquid crystal display device includes a liquid crystal panel assembly and a backlight unit, and the liquid crystal panel assembly again includes a common electrode display panel including a common electrode and a thin film transistor array panel including a thin film transistor array. The common electrode display panel and the thin film transistor array panel face each other and are bonded to each other by a seal pattern interposed between the two substrates, and a liquid crystal layer is formed in a predetermined gap formed therebetween. As described above, the liquid crystal display includes two substrates on which electrodes are formed (common electrode display panel and thin film transistor array panel) and a liquid crystal layer interposed therebetween, and rearranges the liquid crystal molecules of the liquid crystal layer by applying a voltage to the electrode. It is a device configured to display a predetermined image by adjusting the amount of transmitted light.

Recently, a precise liquid crystal display device requires precise alignment when the common electrode display panel and the thin film transistor array panel are attached to each other. In particular, in the vertical alignment mode (VA mode) in which a predetermined domain dividing means is formed in the common electrode of the common electrode display panel and the pixel electrode of the thin film transistor array panel, it is possible to accurately control the liquid crystal alignment when misalignment occurs. And the display characteristics of the liquid crystal display device are deteriorated.

SUMMARY OF THE INVENTION The present invention has been made in an effort to provide a liquid crystal panel assembly capable of accurately aligning a common electrode display panel and a thin film transistor array panel to improve display characteristics of a liquid crystal display.

Another object of the present invention is to provide a liquid crystal display device including the liquid crystal panel assembly.

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

According to an aspect of the present invention, a liquid crystal panel assembly includes a common electrode panel including a common electrode and a plurality of protrusions formed along an edge thereof, and a thin film transistor array disposed to face the common electrode panel. And a thin film transistor array panel including a pixel electrode and an insertion guide part including a groove portion into which the protrusion is inserted, and a liquid crystal layer interposed between the thin film transistor array panel and the common electrode display panel.

According to another aspect of the present invention, there is provided a liquid crystal display device including: the liquid crystal panel assembly, a backlight unit supplying light to the liquid crystal panel assembly, the liquid crystal panel assembly, and the backlight unit. It includes an upper and lower storage container.

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

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

Hereinafter, a liquid crystal display according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is an exploded perspective view illustrating a liquid crystal display according to an exemplary embodiment of the present invention. Referring to FIG. 1, the liquid crystal display 100 according to the exemplary embodiment of the present disclosure generally looks at the liquid crystal panel assembly 130, the backlight unit 140, the upper storage container 110, and the lower storage container 160. Include.

The liquid crystal panel assembly 130 may include a thin film transistor array panel 133, a liquid crystal panel 136 including a common electrode display panel 134, a liquid crystal (not shown), a gate tape carrier package 131, and a data tape carrier package ( 132, a printed circuit board 135, and the like.

The liquid crystal panel 136 includes a thin film transistor array panel 133 including a gate line (not shown) and a data line (not shown), a thin film transistor array, a pixel electrode, and the like, a black matrix, a common electrode, and the like. And a common electrode display panel 134 disposed to face the thin film transistor array panel 133.

The gate tape carrier package 131 is connected to each gate line (not shown) formed in the thin film transistor array panel 133, and the data tape carrier package 132 is formed of each data line (not shown) formed in the thin film transistor array panel 133. Is connected). Here, the protrusions and insertion guides for accurately aligning the thin film transistor array panel 133 and the common electrode panel 134 constituting the liquid crystal panel 136 will be described in detail later with reference to FIG. 2.

Meanwhile, in the printed circuit board 135, various gate driving signals and data driving signals for inputting the gate driving signal to the gate tape carrier package 131 and the data driving signal to the data tape carrier package 132 can be processed. The drive component is mounted.

In addition, the backlight unit 140 may include the optical sheets 141, the light guide plate 142, the lamp assembly 143, and the reflector plate 144.

Here, the light guide plate 142 serves to guide the light supplied to the liquid crystal panel assembly 130. The light guide plate 142 is formed of a panel of a plastic-based transparent material such as acryl to propagate light generated from the lamp toward the liquid crystal panel 136 seated on the light guide plate. Accordingly, various patterns for converting a traveling direction of light incident into the light guide plate 142 toward the liquid crystal panel 136 may be printed on the rear surface of the light guide plate 142.

The lamp assembly 143 includes a lamp inserted into the side of the light guide plate 142 to emit such light and a lamp reflector surrounding the lamp.

The reflective plate 144 is installed on the lower surface of the light guide plate 142 to reflect the light emitted to the lower portion of the light guide plate 42 upward. The reflecting plate 144 is positioned on the lower surface of the light guide plate 142 and is incident on the liquid crystal panel 136 by reflecting the light not reflected by the fine pattern on the rear surface of the light guide plate 142 toward the exit surface of the light guide plate 142. At the same time, it serves to reduce the light loss of the light to be improved and to improve the uniformity of the light transmitted to the exit surface of the light guide plate 142.

The optical sheets 141 are installed on the upper surface of the light guide plate 142 to diffuse and collect light transmitted from the light guide plate 142. The optical sheets 141 include a diffusion sheet, a prism sheet, a protective sheet, and the like. A diffusion sheet located between the light guide plate 142 and the prism sheet disperses the light incident from the light guide plate 142 to prevent the light from being partially concentrated. The prism sheet has a triangular prism with a regular arrangement on the upper surface, and is usually composed of two sheets, and each prism array is arranged so as to cross each other at a predetermined angle, so that the light diffused from the diffusion sheet is a liquid crystal panel. Condensing in a direction perpendicular to the (136). As a result, the light passing through the prism sheet almost runs vertically so that the luminance distribution on the protective sheet is uniformly obtained. The protective sheet formed on the prism sheet not only serves to protect the surface of the prism sheet, but also serves to diffuse light in order to make the distribution of light uniform.

Here, in the case of the small liquid crystal display device 100, one lamp is usually installed on the side of the light guide plate 142, but as the liquid crystal display device 100 becomes larger, a plurality of lamps may be provided in one lamp assembly 143 to obtain sufficient luminance. Lamps can be installed. In addition, an inverter (not shown) for supplying power to the lamp of the lamp assembly 143 and the lamp assembly 143 are electrically connected by wires.

The liquid crystal panel assembly 130 is installed on the protective sheet and is seated in the lower storage container 160 together with the backlight unit 140. The lower storage container 160 has a rectangular shape and a sidewall is formed along the edge of the upper surface to receive and fix the backlight unit 140 and the liquid crystal panel assembly 130 in the sidewall, and include a plurality of sheets. The backlight unit 140 is prevented from bending. The printed circuit board 135 of the liquid crystal panel assembly 130 is bent along the outer surface of the lower storage container 160 and seated on the rear surface of the lower storage container 160. Here, the shape of the lower storage container 160 may be variously modified according to a method of accommodating the backlight unit 140 or the liquid crystal panel assembly 130 in the lower storage container 160.

In addition, the upper accommodating container 110 is disposed to be coupled to the lower accommodating container 160 to cover an upper surface of the liquid crystal panel assembly 130 accommodated in the lower accommodating container 160. The upper surface of the upper accommodating container 110 is formed with a window 112 for exposing the liquid crystal panel assembly 130 to the outside.

The upper storage container 110 may be coupled to the lower storage container 160 through a hook (not shown). For example, a hook is formed along an outer surface of the side wall of the lower storage container 160 and corresponds to the hook. Hook insertion hole (not shown) may be formed on the side of the upper storage container (110). Accordingly, as the upper storage container 110 descends from the upper side of the lower storage container 160, the hook formed in the lower storage container 160 enters the hook insertion hole of the upper storage container 110, thereby lowering the storage container 160. And the upper storage container 110 may be fastened. In addition, the combination of the upper storage container 110 and the lower storage container 160 may be modified in various forms.

Hereinafter, the protrusions and the insertion guide parts for accurately aligning and bonding the thin film transistor array panel and the common electrode panel constituting the liquid crystal panel of FIG. 1 will be described in detail with reference to FIG. 2. 2 is a cross-sectional view of a liquid crystal panel assembly according to an exemplary embodiment of the present invention, illustrating a bonding relationship between a thin film transistor array panel and a common electrode panel.

Referring to FIG. 2, a liquid crystal panel assembly according to an exemplary embodiment of the present invention may include a common electrode display panel 134 and a thin film transistor array panel 133 provided to face the thin film transistor array panel 133 and the thin film transistor array panel 133. The liquid crystal layer 90 is interposed between the common electrode display panel 134.

The thin film transistor array panel 133 is a substrate on which a plurality of thin film transistor arrays and pixel electrodes 82 are provided on the lower substrate 10 made of an insulating material. The thin film transistor array may include a gate electrode 26, a source electrode 65, a drain electrode 66, and the like formed on the lower substrate 10. As the gate electrode 26, the source electrode 65, and the drain electrode 66, a conductive film such as aluminum (Al), chromium (Cr), or molybdenum tungsten (MoW) may be used.

A passivation layer 70 having a contact hole for exposing the drain electrode 66 is formed on the thin film transistor array. The passivation layer 70 may be formed of an organic insulating layer, and specifically, a photosensitive insulating material made of an acrylic resin.

On the other hand, the color filter 8 is formed on the passivation layer 70 in the pixel region except for the contact hole exposing the drain electrode 66. The color filter 8 serves to pass only light of a specific wavelength band. The color filter 8 includes red, green, and blue color filters, and each color filter 8 forms one unit pixel. The color filter 8 may be arranged in a stripe type, a mosaic type, a delta type, a 4-pixel type type, or the like according to an arrangement method. The color filter 8 may be formed to a thickness of about 3 μm using a dyeing method, an electrodeposition method, a pigment dispersion method, a printing method, or the like. 2 shows a red filter 8R and its green filter 8G in the color filter 8.

On the color filter 8, the pixel electrode 82, which is in electrical contact with the drain electrode 66 through a contact hole, is formed to have a uniform thickness. The pixel electrode 82 is made of indium tin oxide (ITO) or indium zinc oxide (IZO), which is a transparent conductive material.

An orientation layer (not shown) is stacked on the pixel electrode 82. As the alignment layer, an organic polyimide series may be mainly used. Unexplained reference numeral 12 denotes a polarizing plate, reference numeral 30 denotes a gate insulating film, reference numeral 40 denotes an active layer, and reference numerals 55 and 56 denote ohmic contact layers.

The common electrode display panel 134 is a substrate on which the black matrix 6 and the common electrode 14 are provided on the transparent upper substrate 4.

Specifically, a black matrix 6 is formed at a position facing the thin film transistor array on the upper substrate 4 to absorb diffusely reflected light. The common electrode 14 is formed to have a uniform thickness on the upper substrate 4 and the black matrix 6. Here, the common electrode 14 is made of ITO or IZO, which is a transparent conductive material.

An alignment film (not shown) is stacked on the common electrode 14. The liquid crystal molecules in the liquid crystal layer 90 interposed between the thin film transistor array panel 133 and the common electrode display panel 134 are pretilted at a selected angle by an alignment layer formed on the thin film transistor array panel 133 and the common electrode display panel 134. do. Unexplained reference numeral 2 is a polarizing plate.

As illustrated in FIG. 2, a seal pattern 230 is formed at edges of the thin film transistor array panel 133 and the common electrode panel 134. The seal pattern 230 forms a cell gap for liquid crystal injection between the thin film transistor array panel 133 and the common electrode display panel 134 and prevents the injected liquid crystal from leaking.

At the edge of the seal pattern 230, a protrusion 1 and an insertion guide 18 may be formed to assist the alignment of the common electrode display panel 134 and the thin film transistor array panel 133. That is, the protrusion 1 is formed on the common electrode display panel 134, and the insertion guide part 18 having the groove 9 into which the protrusion 1 is inserted and coupled is formed on the thin film transistor array panel 133. have.

The protrusion 1 may be formed of the same material and process as that of a column spacer (not shown) for maintaining a cell gap between the common electrode panel 134 and the thin film transistor array panel 133. The protrusion 1 may be formed to a height of about 3 to 3.5 μm using, for example, an acrylic resin-based material.

In addition, the insertion guide part 18 has a groove part 9 formed to insert and couple the protrusion part 1, and for convenience of manufacture, the insertion guide part 18 is made of the same material and process as the color filter 8 formed on the thin film transistor array panel 133. Can be formed. However, in order to overcome the difference in the cell gap, the insertion guide 18 is preferably formed of two color filters 8. For example, as shown in FIG. 2, the insertion guide 18 may be composed of a red filter 8R formed on the passivation layer 70 and a green filter 8G formed on the red filter 8R. In addition, the groove 9 may be formed in the green filter 8G. The present invention is not limited thereto, and the insertion guide part 18 may have a structure in which any two filters among red, green, and blue filters are stacked, and the insertion guide part 18 may have a height of about 6 μm. .

As such, when the thin film transistor array panel 133 and the common electrode panel 134 are bonded to each other, the protrusions 1 may be inserted into and coupled to the grooves 9 of the insertion guide 18, thereby achieving accurate alignment.

3 is a perspective view illustrating a thin film transistor array panel of the liquid crystal panel assembly of FIG. 2. As illustrated in FIG. 3, a seal pattern 230 is formed along an edge of the thin film transistor array panel 133, and an insertion guide part 18 is formed outside the seal pattern 230. In the embodiment of FIG. 3, the insertion guides 18 are formed separately from each other along the four sides of the thin film transistor array panel 133, but the present invention is not limited to this shape and may be formed integrally or further divided into a plurality. have.

4 is a plan view illustrating a mother substrate on which a plurality of thin film transistor array panels of FIG. 2 are disposed. Referring to FIG. 4, a plurality of thin film transistor array panels 133 may be simultaneously formed on one mother glass 400 for efficiency of a manufacturing process. Here, a region corresponding to each thin film transistor array panel 133 is called a cell. Although not shown, a plurality of common electrode display panels may be formed on one mother substrate, and the liquid crystal panels are formed by bonding the two mother substrates and cutting them in cell units. As such, when the mother substrate 400 on which the plurality of thin film transistor array panels 133 is formed and the mother substrate on which the plurality of common electrode display panels are formed are bonded together, the mother substrate may be distorted when the distance between the cells is far. Therefore, since the protrusion and the insertion guide of the present invention are positioned between the cell and the cell and are coupled to each other, the two mother substrates may support the two mother substrates when the two mother substrates are bonded to each other, thereby preventing the mother substrate from twisting.

In the exemplary embodiment of the present invention described above, the wedge type backlight assembly including the lamp assembly at one side of the light guide plate is described as an example, but the lamp assembly is provided at both sides of the light guide plate having a flat plane. The same applies to the flat type backlight assembly.

In addition, in the above-described embodiment of the present invention, an edge type backlight assembly having a lamp on the side of the light guide plate is described as an example, but a structure in which a plurality of lamps are arranged on the bottom surface without the light guide plate is provided. The same applies to the direct backlight assembly having the same.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive.

As described above, according to the liquid crystal panel assembly and the liquid crystal display apparatus including the same, the display characteristics of the liquid crystal display may be improved by accurately aligning the common electrode display panel and the thin film transistor array panel.

Claims (9)

A common electrode display panel including a common electrode and a plurality of protrusions formed along an edge thereof; A thin film transistor array panel disposed to face the common electrode panel, the thin film transistor array panel including an insertion guide part including a thin film transistor array, a pixel electrode, and a groove into which the protrusion is inserted; And And a liquid crystal layer interposed between the thin film transistor array panel and the common electrode display panel. According to claim 1, A column spacer formed between the thin film transistor array panel and the common electrode display panel to maintain a cell gap; The protrusion is formed in the same layer of the same material as the column spacer liquid crystal panel assembly. According to claim 1, The protrusion is a liquid crystal panel assembly made of an acrylic resin material. According to claim 1, And a protrusion formed at a height of about 3 to 3.5 μm. According to claim 1, Further comprising a color filter formed on the thin film transistor array panel, The insertion guide portion is a liquid crystal panel assembly formed on the same layer of the same material as the color filter. The method of claim 5, The color filter includes a red filter, a green filter, and a blue filter, The insertion guide part has a structure in which any two filters of the red filter, the green filter, and the blue filter are stacked. According to claim 1, The insertion guide portion is a liquid crystal panel assembly formed to a height of about 6㎛. According to claim 1, The semiconductor device may further include a seal pattern formed at an edge coupling portion of the thin film transistor array panel and the common electrode display panel. The insertion guide portion is a liquid crystal panel assembly which is located outside the seal pattern. The liquid crystal panel assembly according to any one of claims 1 to 8; A backlight unit supplying light to the liquid crystal panel assembly; And And a top and bottom storage containers accommodating the liquid crystal panel assembly and the backlight unit.

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