KR20170116844A - Liquid crystal display device and method for manufacturing thereof - Google Patents

Abstract

A liquid crystal display according to an embodiment of the present invention includes a first substrate and a second substrate positioned opposite to the first substrate, a first polarizer on the first substrate, a second polarizer on the second substrate, and a second substrate And a protective layer disposed between the second polarizing plate and the conductive tape and covering a side surface of the second polarizing plate.

Description

TECHNICAL FIELD [0001] The present invention relates to a liquid crystal display device and a method of manufacturing the same,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device and a method of manufacturing the same that minimize the occurrence of defects due to chemical substances or moisture penetration into the edge side of a liquid crystal panel.

BACKGROUND ART With the advent of a full-fledged information age, display fields for visually displaying electrical information signals are rapidly developing. Accordingly, studies are being continued to improve performance such as thinning, weight reduction, and low power consumption for various display devices.

Typical examples of such a display device include a liquid crystal display device (LCD), a field emission display device (FED), and an organic light emitting display device (OLED) have. Such display devices inevitably include a display panel for realizing an image. The display panel has a structure in which a pair of substrates facing each other with an inherent luminescent substance or a polarizing substance interposed therebetween.

A liquid crystal display (LCD) displays an image by adjusting the transmittance of light emitted from a backlight unit using a light transmittance of a liquid crystal. To this end, the liquid crystal display device comprises a first substrate which is a first substrate, a second substrate which is attached to the top of the first substrate with the liquid crystal layer therebetween, a first polarizer attached to the first substrate, And a liquid crystal panel having two polarizing plates.

On the first substrate, a gate line and a data line are cross-formed to define a pixel region, a thin film transistor is formed in a region where the gate line and the data line cross each other, and a pixel electrode connected to the thin film transistor is formed in the pixel region have. The pads provided in the peripheral region of one side of the first substrate are exposed to the outside so as to be connected to the panel driver for applying signals to the gate lines and the data lines.

The second substrate is formed to have a relatively smaller area than the first substrate, and is adhered to the first substrate excluding the pad portion of the first substrate with the liquid crystal interposed therebetween.

The first polarizer is attached to the lower surface of the first substrate to polarize the light incident from the backlight unit. The second polarizer is attached to the upper surface of the second substrate to polarize light emitted to the outside through the second substrate. The first polarizer and the second polarizer generally have light transmission axes perpendicular to each other.

The panel driving unit is connected to the pad unit of the first substrate exposed to the outside, and supplies a signal to the gate line and the data line.

The liquid crystal display includes a guide panel including a backlight unit including a light source and a panel support for supporting the liquid crystal panel, a lower case for receiving the backlight unit and supporting the guide panel, And an upper case.

In recent years, in the case of a liquid crystal display device, the edge area of the upper case, which covers the edge of the liquid crystal panel so as to have a slim and narrow bezel, has been developed in a direction in which the edge of the liquid crystal panel is exposed to the outside have.

The edge side of the liquid crystal panel of the liquid crystal display device may be vulnerable to the external environment. In the case of a liquid crystal display having a structure in which the edges of the liquid crystal panel are exposed to the outside as described above, when chemicals or moisture penetrate through the edge side of the liquid crystal panel, defects may occur in the edge regions of the liquid crystal panel. Can be viewed from the outside.

In particular, a conductive tape may be formed on a second substrate on one side of a liquid crystal panel in order to prevent damage from external static electricity in a transverse electric field liquid crystal display device. In this case, The space between the second polarizing plates may be more susceptible to chemicals or moisture penetration from the outside.

In recent reliability tests of a liquid crystal display device of a transverse electric field system in a high-temperature and high-humidity atmosphere, a chemical reaction between chemical substances or moisture penetrated through the edge side of the second polarizer plate of the liquid crystal panel and chemical reaction of the polarizer plate, Shrinkage occurs and the color is distorted to cause a problem in the display quality of the liquid crystal display device.

In addition, since a part of the second polarizing plate is peeled or damaged due to chemicals or moisture penetrated through the edge side of the second polarizing plate at the edge of the liquid crystal panel, the reliability of the liquid crystal display according to the external environment is lowered Which is required to be improved.

Disclosure of the Invention The present invention has been conceived to solve the above-described problems, and it is an object of the present invention to provide a protective layer between a second polarizing plate at the lower edge of a liquid crystal panel and a conductive tape in a liquid crystal display device, And to provide a method of manufacturing the liquid crystal display device.

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

According to an embodiment of the present invention, there is provided a liquid crystal display device and a method of manufacturing the same that can minimize the occurrence of defects due to chemical substances or moisture infiltration on the edge side of a liquid crystal panel.

A liquid crystal display according to an embodiment of the present invention includes a first substrate and a second substrate positioned opposite to the first substrate, a first polarizer on the first substrate, a second polarizer on the second substrate, and a second substrate And a protective layer disposed between the second polarizing plate and the conductive tape and covering a side surface of the second polarizing plate.

The conductive tape may electrically connect the first substrate and the second substrate.

And a transparent conductive electrode disposed on the second substrate and positioned below the second polarizer.

The protective layer may be located on the second substrate of at least one of the four sides of the liquid crystal display device.

The protective layer may be formed by using an organic solvent such as ethyl nonafluoroisobutyl ether, Ethyl nonafluorobutyl ether, Methyl nonafluoroisobutyl ether, Methyl nonafluorobutyl ether, ether, and a fluoroaliphatic polymer.

The thickness of the protective layer may be from 15 탆 to 20 탆.

The protective layer may be formed by any one of a spray method, a jetting method, a pad print method, and a pen method.

The separation distance between the conductive tape and the second polarizing plate may be 0.25 mm or more.

The second substrate and the conductive tape may be configured to overlap by 0.75 mm or more.

The protective layer may be configured to minimize the penetration of chemicals or moisture into the second polarizing plate.

The first substrate, the second substrate, and the first layer, which are located on at least one side of four sides of the liquid crystal display device and cover the side surfaces of the first substrate, the second substrate, and the second polarizer.

The first layer may be configured to minimize the occurrence of light leakage defects at the edges of the first substrate and the second substrate.

And a second layer located on the first layer.

The second layer can be configured to minimize penetration of chemicals or moisture into the second polarizer plate.

The method for manufacturing a liquid crystal display device according to an embodiment of the present invention including a liquid crystal panel including a first substrate, a second substrate and a liquid crystal layer between the first substrate and the second substrate facing each other is characterized in that, among four sides of the liquid crystal panel, Forming a first layer on the left edge, top edge and right edge side of the liquid crystal panel, forming a second layer on the first layer of the left edge, top edge and right edge side of the liquid crystal panel, , Forming a protective layer between the second polarizing plate on the lower edge of the liquid crystal panel and the conductive tape.

The step of forming the first layer may include applying ink to cover the second polarizer on the first substrate, the second substrate, and the second substrate, and curing the ink.

The step of forming the second layer may include applying an ultraviolet (UV) curable resin on the first layer and curing the ultraviolet curable resin.

The step of forming the protective layer may include a step of applying a protective layer between the second polarizing plate and the conductive tape so as to cover the side surface of the second polarizing plate, and curing the protective layer.

According to the liquid crystal display device according to the embodiment of the present invention, a protective layer is formed between the polarizing plate and the conductive tape located at the lower edge of the liquid crystal panel to minimize penetration of chemical substances or moisture through the polarizing plate and the conductive tape, It is possible to minimize defects such as deformation or peeling of the polarizing plate due to reaction with moisture and improve the reliability of the liquid crystal display device against the external environment.

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

The scope of the claims is not limited by the matters described in the contents of the invention, as the contents of the invention described in the problems, the solutions to the problems and the effects to be solved do not specify essential features of the claims.

1A is a schematic plan view of a liquid crystal display device according to an embodiment of the present invention.
FIG. 1B is a cross-sectional view taken along line X-X 'of a liquid crystal display device according to an embodiment of the present invention.
1C is a view showing a cross-sectional structure taken along line Y-Y 'of a liquid crystal display device according to an embodiment of the present invention.
2 is a cross-sectional view of a liquid crystal display device according to another embodiment of the present invention.
3A to 3D are views showing a method of forming a protective layer of a liquid crystal display device according to an embodiment of the present invention.
4 is a flowchart illustrating a method of manufacturing a liquid crystal display device according to an embodiment of the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The advantages and features of the present invention and the manner of achieving them will become apparent with reference to the embodiments described in detail below with reference to the accompanying drawings. It should be understood, however, that the invention is not limited to the disclosed embodiments, but is capable of many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, To fully disclose the scope of the invention to those skilled in the art, and the invention is only defined by the scope of the claims.

The shapes, sizes, ratios, angles, numbers, and the like disclosed in the drawings for describing the embodiments of the present invention are illustrative, and thus the present invention is not limited thereto. Like reference numerals refer to like elements throughout the specification. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Where the terms "comprises", "having", "done", and the like are used in this specification, other portions may be added unless "only" is used. Unless the context clearly dictates otherwise, including the plural unless the context clearly dictates otherwise.

In interpreting the constituent elements, it is construed to include the error range even if there is no separate description. In the case of a description of the positional relationship, for example, if the positional relationship between two parts is described as 'on', 'on top', 'under', and 'next to' Or " direct " is not used, one or more other portions may be located between the two portions.

Also, the first, second, etc. are used to describe various components, but these components are not limited by these terms. These terms are used only to distinguish one component from another. Therefore, the first component mentioned below may be the second component within the technical spirit of the present invention.

It is to be understood that each of the features of the various embodiments of the present invention may be combined or combined with each other, partially or wholly, technically various interlocking and driving, and that the embodiments may be practiced independently of each other, It is possible.

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

1A is a schematic plan view of a liquid crystal display device according to an embodiment of the present invention.

1B is a cross-sectional view taken along line X-X 'of a liquid crystal display according to an embodiment of the present invention.

1C is a view showing a cross-sectional structure taken along line Y-Y 'of a liquid crystal display device according to an embodiment of the present invention.

1A, a liquid crystal display device 100 according to an embodiment of the present invention includes a left side edge 100a, an upper side edge 100b, a right side edge 100c, and a lower side edge 100d, It has four sides.

The four sides of the first substrate 111 and the second substrate 112 are disposed on the first substrate 111, the second substrate 112 and the first substrate 111, respectively, when viewed from the side of the liquid crystal display 100, 113) and a second polarizing plate (114) positioned on the second substrate (112).

1A, 1B and 1C, a liquid crystal display 100 according to an embodiment of the present invention includes a liquid crystal panel 110, a backlight unit 120, a guide panel 130, and a lower case 140, .

The liquid crystal panel 110 may include a first substrate 111 and a second substrate 112 which are bonded to each other with the liquid crystal layer LC therebetween. And a first polarizer 113 positioned below the first substrate 111 and a second polarizer 114 positioned on the second substrate 112.

The first substrate 111 may be a thin film transistor array substrate including a plurality of pixels including thin film transistors. For example, the first substrate 111 may include a plurality of gate lines, a plurality of data lines, and a plurality of data lines, each of which defines a pixel region formed so as to intersect with each other, And a plurality of pixels for driving the liquid crystal material of the liquid crystal layer LC on the pixel region.

Each of the plurality of pixels includes a thin film transistor connected to the gate line and the data line, a plurality of pixel electrodes connected to the thin film transistor and supplied with a data signal through the thin film transistor, and a plurality of pixel electrodes, And at least one common electrode supplied thereto.

The first substrate 111 forms a horizontal electric field on the corresponding pixel region by the data signal supplied to the pixel electrode of each pixel and the common voltage supplied to the common electrode to form the liquid crystal layer LC on the pixel region Thereby controlling the transmittance of light in the pixel region irradiated from the backlight unit 120. [

The second substrate 112 may be a color filter array substrate including a color filter formed to overlap each of a plurality of pixels. For example, the second substrate 112 may include a pixel defining pattern that defines a light transmitting region corresponding to each of the plurality of pixels, a color filter layer formed in the light transmitting region, and an overcoat layer covering the pixel defining pattern and the color filter layer .

The second substrate 112 filters the light emitted toward the front side of the second substrate 112 through the liquid crystal layer LC with color light so that the color image is displayed on the liquid crystal panel 110.

The first substrate 111 and the second substrate 113 are adhered to each other by a sealant with the liquid crystal layer LC interposed therebetween.

The specific configurations of the first substrate 111 and the second substrate 112 are the same as those of the driving mode of the liquid crystal layer, for example, TN (Twisted Nematic) mode, VA (Vertical Alignment) And may be formed in various forms depending on the FFS (Fringe Field Switching) mode and the like.

1A, 1B and 1C, a liquid crystal display 100 according to an exemplary embodiment of the present invention includes a first polarizer 113 and a second substrate 112 disposed below a first substrate 111, And a second polarizing plate 114 positioned on the second polarizing plate 114.

The first polarizer 113 and the second polarizer 114 positioned on the first substrate 111 and the second substrate 112 respectively include a first protective film, a polyvinyl alcohol (PVA) film, A second protective film, and an antireflection film, which are sequentially stacked.

The first protective film and the second protective film are formed on the upper and lower surfaces of the polarizing film to protect the polarizing film. At this time, the first protective film is attached to the substrate by the adhesive.

The anti-reflection film is formed on the upper surface of the second protective film to prevent reflection of external light generated on the surfaces of the lower and upper polarizing members.

The polarizing film converts non-polarized light that vibrates in various directions into polarized light that vibrates only in one direction. The polarizing film can be produced by dying iodine in a polyvinyl alcohol (PVA) film and then elongating in a specific direction.

Accordingly, the polarizing film (PVA) absorbs light that vibrates in the same direction as the stretching direction, and transmits light that oscillates in a direction perpendicular to the stretching direction, thereby polarizing the incident light.

1A, 1B, and 1C, the backlight unit 120 is disposed below the liquid crystal panel 110 to supply light to the liquid crystal panel 110. FIG.

The backlight unit 120 includes a direct light type in which light emitted from a light source is directly transmitted to the liquid crystal panel 110 by arranging a light source on a lower front surface of the liquid crystal panel 110, And an edge type in which light emitted from the light source is transmitted to the liquid crystal panel 110 through the light guide plate. In the case of the present invention, any of a direct-type type and an edge type can be applied.

For example, in the case of the edge-type backlight unit 120, a light source located on a lower side of the lower surface of the liquid crystal panel 110, a light guide plate for transmitting light emitted from the light source upward, And a plurality of optical sheets for improving luminance characteristics of light traveling from the light guide plate toward the liquid crystal panel 110. Here, the light source may include a light emitting diode (LED) or a fluorescent lamp.

The optical sheet may be a combination of a diffusion sheet and a prism sheet, but is not limited thereto. For example, the optical sheet may further comprise a Dual Brightness Enhancement Film (DBEF).

1A, 1B and 1C, the guide panel 130 is configured to cover the side surface of the liquid crystal panel 110 and the side surface of the backlight unit 120 while supporting the liquid crystal panel 110 .

The guide panel 130 protrudes from inner side surfaces of guide sidewalls and guide sidewalls surrounding the respective side surfaces of the liquid crystal panel 110 and the backlight unit 120 to support the bottom edge portion of the liquid crystal panel 110 And a panel supporting portion for supporting the panel.

1A, 1B and 1C, the lower case 140 is formed to have an open upper surface so as to have a storage space, and supports the guide panel 130 while receiving the backlight unit 120 . To this end, the lower case 140 may include a cover plate and a cover side wall.

The cover plate supports the light guide plate of the backlight unit 120 and a plurality of optical sheets. The cover side wall is bent perpendicularly from the edge portion of the cover plate to support the guide panel 130 while defining a storage space in which the backlight unit 120 is housed on the cover plate.

The lower case 140 may be made of a metal material and may be electrically connected to a grounding member as the case may be.

In the case of the liquid crystal display device of the transverse electric field mode such as the above-described In Plane Switching (IPS) mode or FFS (Fringe Field Switching) mode, at least one pair of electrodes arranged in parallel in the pixel are formed, The liquid crystal molecules are arranged in a plane by forming a transverse electric field.

That is, a pixel electrode and a common electrode are formed on a first substrate, which is a lower substrate, and liquid crystal molecules of the liquid crystal layer are driven by a horizontal electric field formed between the pixel electrode and the common electrode.

In the liquid crystal display device of the transverse electric field mode driven by the horizontal electric field, since an electrode is not formed on the second substrate which is an upper substrate, unnecessary electric charges such as static electricity easily enter from the outside. In this case, when static electricity flows from the outside, static electricity affects the molecular alignment direction of the liquid crystal and hinders normal operation, so that image quality deterioration may occur.

Therefore, in order to solve the above problems, the liquid crystal display device of the transverse electric field mode may include a transparent conductive electrode on the upper surface of the second substrate. The transparent conductive electrode may serve as a ground for transmitting light transmitted through the second substrate to the outside and discharging a noise signal such as static electricity flowing into the liquid crystal panel.

That is, after the transparent conductive electrode is formed on the second substrate, the transparent conductive electrode is grounded through the conductive tape, so that the static electricity flowing from the outside can be discharged to the outside.

However, when the conductive tape is formed on the second substrate on one side of the liquid crystal panel as described above, the space between the conductive tape and the second polarizer may be vulnerable to penetration of chemicals or moisture from the outside.

Referring to FIG. 1B, the lower edge 100d of the liquid crystal display 100 according to the embodiment of the present invention, that is, the cut surface taken along the line X-X 'in FIG. 1A, 100 are disposed on the second substrate 112 and the second polarizer 114 and the second polarizer 114 located on the transparent conductive electrode 117, And a conductive tape 115 spaced apart from the conductive tape 115 by a predetermined distance a.

Referring to FIG. 1B, the conductive tape 115 may electrically connect the first substrate 111 and the second substrate 112. The transparent conductive electrode 117 formed on the second substrate 112 exposed to the outside of the second polarizing plate 114 in a part of the non-display area of the second substrate 112 is covered with a And the other end of the conductive tape 115 is connected to one end of the ground provided on the external driving circuit board which is one of the components constituting the guide panel 130, the lower case 140, By being attached to any one of them and being grounded, the static electricity flowing from the outside can be grounded and discharged to the outside.

The transparent conductive electrode 117 may be made of a transparent material having a high electrical conductivity. More specifically, the transparent conductive electrode 117 may be formed of a material such as indium tin oxide (ITO), but is not limited thereto.

The second substrate 112 and the conductive tape 115 may be formed to be sufficiently overlapped to form a stable electrical contact between the transparent conductive electrode 117 on the second substrate 112 and the first substrate 111 , And the distance b between the second substrate 112 and the conductive tape 115 may be 0.75 mm or more.

1B, a liquid crystal display 100 according to an embodiment of the present invention includes a first polarizing plate 114 and a second polarizing plate 114 disposed between the second polarizing plate 114 and the conductive tape 115, (116).

1A and 1B, the conductive tape 115 may be disposed on the lower edge 100d of the four sides of the liquid crystal display 100, and the protective layer 116 may be disposed on the liquid crystal display device 100 may be disposed between the second polarizer 114 and the conductive tape 115 at the lower edge 100d.

However, the positions of the conductive tape 115 and the protective layer 116 are not limited thereto, and the conductive tape 115 and the protective layer 116 may be disposed on four sides of the liquid crystal display device 100, And may be positioned on the second substrate 112 on at least one side of the edge 100a, the top edge 100b, the right edge 100c, and the bottom edge 100d. More specifically, the protective layer 116 may be disposed on the transparent conductive electrode 117 disposed on the second substrate 112.

The protective layer 116 may be formed of a material selected from the group consisting of Ethyl nonafluoroisobutyl ether, Ethyl nonafluorobutyl ether, Methyl nonafluoroisobutyl ether, Methyl nonafluoro Methyl nonafluorobutyl ether, and Fluoroaliphatic polymer. The fluorine-containing polymer may be selected from the group consisting of fluorine-containing polymers, fluorine-containing polymers, and the like.

However, the material of the protective layer 116 is not necessarily limited to the above material, and various materials having opaque, excellent moisture-proof characteristics, low viscosity and chemical stability can be applied.

The thickness of the protective layer 116 should be sufficient to completely cover the side surface of the second polarizing plate 114 so that the thickness of the protective layer 116 may be 15 to 20 μm. .

1B, the distance a between the second polarizing plate 114 and the conductive tape 115 is set such that the protective layer 116 applied between the second polarizing plate 114 and the conductive tape 115 is the second And a sufficient distance to cover the side surface of the polarizing plate 114. More specifically, the separation distance a may be 0.25 mm or more.

The protective layer 116 may be formed by a spray method in which an ink supplied by pneumatic spattering is scattered over a wide area, a jetting method in which ink is ejected through piezo driving by a pulse to be applied, A pad printing method of transferring ink filled in a pad to a substrate to form a pattern, or a method of applying ink through a pen including ink.

That is, the protective layer 116 of the liquid crystal display 100 according to the embodiment of the present invention is formed so as to cover the side surface of the second polarizing plate 114 between the second polarizing plate 114 and the conductive tape 115, 2 polarizing plate 114 to minimize the penetration of chemicals or moisture into the side of the polarizing plate 114. [

1C, a liquid crystal display 100 according to an exemplary embodiment of the present invention includes a liquid crystal display 100 (hereinafter, referred to as " liquid crystal display 100 " The first substrate 111, the second substrate 112 and the second polarizing plate 114, which are located at the left edge 100a, the upper edge 100b and the right edge 100c of the first substrate 111, (118). ≪ / RTI >

That is, the first layer 118 is formed on at least one side of four sides of the liquid crystal display device 100, that is, a left side edge 100a, an upper side edge 100b, a right side edge 100c and a lower side edge 100d The second substrate 112, and the second polarizer 114 of the first substrate 111, the first substrate 111, the second substrate 112, and the second polarizer 114, respectively.

The first layer 118 is formed on the first substrate 111 by the light supplied from the backlight unit 120 formed on the lower portion of the first polarizer 113 disposed on the lower surface of the first substrate 111 of the liquid crystal display 100. [ ) And the edge of the second substrate 112 may be minimized.

For example, the first layer 118 may comprise a thermosetting resin comprising a pigment such as black ink. The first layer 118 is made of any one of a printing layer, a film, and a coated film of a color print pigment having a very low transmittance, so that light leakage in the non-display region of the first substrate 111 and the second substrate 112 And the like.

The first layer 118 may be formed by a method such as a spray method, a jetting method, a pad printing method, or the like, so as to cover the sides of the first substrate 111, the second substrate 112 and the second polarizer 114 Print method, and Pen method.

The first layer 118 may be formed of the same material as the protective layer 116 and may be configured to minimize the penetration of chemicals or moisture into the side surfaces of the second polarizer plate 114.

That is, the liquid crystal display 100 according to the embodiment of the present invention includes the protective layer 116 between the second polarizer 114 and the conductive tape 115 located at the lower edge of the liquid crystal panel 110, It is possible to minimize the occurrence of defects in which the second polarizing plate 114 is deformed or peeled due to a reaction with a chemical substance or moisture by minimizing penetration of chemical substances or moisture through the polarizing plate 114 and the conductive tape 115 The reliability of the liquid crystal display device with respect to the external environment can be improved.

2 is a cross-sectional view of a liquid crystal display device according to another embodiment of the present invention.

In the case of the liquid crystal display device 200 according to another embodiment of the present invention, the embodiment of the present invention described with reference to FIGS. 1A to 1C, except that the liquid crystal display device 200 further comprises a second layer on the first layer 118 The liquid crystal display device 100 according to the second embodiment has the same configuration as the liquid crystal display device 100 according to the first embodiment. Therefore, repeated description of substantially the same configuration will be omitted.

2, a liquid crystal display 200 according to another embodiment of the present invention includes a left side edge 100a, an upper side edge 100b, And a first layer 118 covering the sides of the first substrate 111, the second substrate 112 and the second polarizing plate 114 at the right edge 100c and the right edge 100c.

That is, the first layer 118 is formed on at least one side of the four sides of the liquid crystal display device 200, that is, the left side edge 100a, the upper side edge 100b, the right side edge 100c and the lower side edge 100d The second substrate 112, and the second polarizing plate 114 of the first substrate 111, the first substrate 111, the second substrate 112, and the second polarizing plate 114, respectively. Therefore, the light supplied from the backlight unit 120 formed on the lower portion of the first polarizer 113 disposed on the lower surface of the first substrate 111 minimizes the occurrence of defects in the light leakage that may occur at the edge of the liquid crystal panel 110 can do.

2, a liquid crystal display device 200 according to another embodiment of the present invention includes a first side 100a, an upper side edge 100b, and a first side 100c formed on the left side 100a, And a second layer 219 formed on layer 118.

The second layer 219 may be made of an ultraviolet curable resin that can be cured by ultraviolet (UV) irradiation. The second layer 219 may penetrate the second polarizing plate 114 through the edge side of the liquid crystal display 100, To minimize the thickness of the film. It is also possible to further constitute at least one layer on the second layer 219.

That is, in the case of the liquid crystal display device 200 according to another embodiment of the present invention, the first substrate 111, the second substrate 112, and the second polarizer (at least one of the four sides of the liquid crystal display device) The first layer 118 and the second layer 219 located on the side of the first substrate 111 and the second substrate 112 are disposed on the side of the first substrate 111 and the second substrate 112, It is possible to minimize the occurrence of defects in the light leakage that may occur at the edges and to minimize the penetration of chemical substances or moisture into the second polarizing plate 114 through the edge side of the liquid crystal display device.

3A to 3D are views showing a method of forming a protective layer of a liquid crystal display device according to an embodiment of the present invention.

3A, a liquid crystal panel 110 of a liquid crystal display according to an exemplary embodiment of the present invention includes a first substrate 111 and a second substrate 112, which are bonded together to face each other with a liquid crystal layer LC therebetween. . The first polarizer 113 and the second polarizer 114 are disposed on the first substrate 111 and the second substrate 112, respectively.

A second polarizer 114 disposed on the transparent conductive electrode 117 and a second polarizer 114 disposed on the second substrate 112 and disposed on the second substrate 112; And a conductive tape 115 spaced apart from the conductive tape 115 by a predetermined distance.

The second polarizing plate 114 and the conductive tape 115 may be configured to have a sufficient distance to cover the side surface of the second polarizing plate 114 with the protective layer 116 applied therebetween.

Further, a protective film 310 is disposed on the upper surface of the second polarizing plate 114. The protective film 310 may be formed of a support and a lower adhesion layer and may be attached on the second polarizing plate 114 of the liquid crystal panel 310.

Next, referring to FIG. 3B, a protective layer material 316 is applied to the space secured between the second polarizer 114 and the conductive tape 115 by using a dispenser 350 apparatus. The protective layer material 316 is coated on the end of the protective film 310 on the second polarizing plate 114 so that the protective layer material 316 flows down the side surface of the second polarizing plate 114, 114 and the conductive tape 115 can be easily filled.

Here, the protective layer material 316 applied between the second polarizing plate 114 and the conductive tape 115 should be applied to a sufficient thickness to cover the side surface of the second polarizing plate 114.

Next, referring to FIG. 3C, a protective layer material 316 is applied between the second polarizer 114 and the conductive tape 115 to a sufficient thickness to cover the side surface of the second polarizer 114, and then cured at room temperature Layer 116 is formed.

Finally, referring to FIG. 3D, the liquid crystal panel 110 of the liquid crystal display according to the embodiment of the present invention is completed by removing the protective film 310 disposed on the upper surface of the second polarizing plate 114.

The protective layer 116 formed by the above method minimizes penetration of chemical substances or moisture through the space between the second polarizing plate 114 and the conductive tape 115 so that the second polarizing plate 114 is deformed by the chemical reaction Or peeling off can be minimized and the reliability of the liquid crystal display device with respect to the external environment can be improved.

4 is a flowchart illustrating a method of manufacturing a liquid crystal display device according to an embodiment of the present invention.

4, a method of manufacturing a liquid crystal display device according to an embodiment of the present invention including a first substrate, a second substrate, and a liquid crystal layer between the first substrate and the second substrate facing each other, (S401) of forming the first layer on the left edge, the top edge and the right edge side of the liquid crystal panel among the side edges.

The forming of the first layer may include coating the side surfaces of the first, second and second polarizing plates on the first substrate, the second substrate, and the second substrate so as to cover the second polarizing plate And thermally curing the ink (S402).

4, forming a second layer on the first layer formed on the left edge, the top edge and the right edge side of the four sides of the liquid crystal panel (S403) may be included.

Further, the step of forming the second layer may include a step (S404) of applying a UV curable resin on the first layer and curing the UV curable resin by irradiating the resin with UV.

4, forming a protective layer between the second polarizer at the lower edge of the liquid crystal panel and the conductive tape among the four sides of the liquid crystal panel (S405) may be included.

The forming of the protective layer may include a step 406 of applying a protective layer between the second polarizing plate and the conductive tape so as to cover the side surface of the second polarizing plate and naturally curing the protective layer at room temperature.

(S401) of applying a first layer and a step (S402) of curing the first layer; applying a second layer (S403); curing the second layer And the step of forming the second layer including the step of forming the second layer including the step of forming the second layer including the step of forming the second layer (Step S404) may be reversed. In this case as well, the occurrence of the light- And the same effect of minimizing the penetration of chemical substances or moisture into the second polarizing plate 114 through the edge side of the liquid crystal panel can be obtained.

As described above, the liquid crystal display according to the embodiment of the present invention minimizes the penetration of chemical substances or moisture through the space between the second polarizing plate and the conductive tape through the formation of the protective layer between the second polarizing plate and the conductive tape The occurrence of defects such as deformation or peeling of the second polarizing plate can be minimized and reliability of the liquid crystal display device against the external environment can be improved.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, have. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. Therefore, it should be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of protection of the present invention should be construed according to the claims, and all technical ideas within the scope of equivalents should be interpreted as being included in the scope of the present invention.

100: liquid crystal display
110: liquid crystal panel
111: first substrate
112: second substrate
113: first polarizer plate
114: second polarizer plate
115: Conductive tape
116: Protective layer
117: transparent conductive electrode
118: First Floor
219: Second layer
120: Backlight unit
130: Guide panel
140: Lower case

Claims (18)

A first substrate and a second substrate facing the first substrate;
A first polarizer on the first substrate and a second polarizer on the second substrate;
A conductive tape disposed on the second substrate and spaced apart from the second polarizer; And
And a protective layer disposed between the second polarizer and the conductive tape and covering a side surface of the second polarizer. The method according to claim 1,
And the conductive tape electrically connects the first substrate and the second substrate. 3. The method of claim 2,
And a transparent conductive electrode disposed on the second substrate and positioned below the second polarizer. The method according to claim 1,
Wherein the protective layer is positioned on the second substrate on at least one side of four sides of the liquid crystal display device. The method according to claim 1,
The protective layer may be formed of a material selected from the group consisting of Ethyl nonafluoroisobutyl ether, Ethyl nonafluorobutyl ether, Methyl nonafluoroisobutyl ether, Methyl nonafluorobutyl ether) and a fluoroaliphatic polymer. The method according to claim 1,
Wherein the thickness of the protective layer is 15 占 퐉 to 20 占 퐉. The method according to claim 1,
Wherein the protective layer is formed by one of a spray method, a jetting method, a pad print method, and a pen method. The method according to claim 1,
And the distance between the conductive tape and the second polarizing plate is 0.25 mm or more. The method according to claim 1,
And the second substrate and the conductive tape overlap each other by 0.75 mm or more. The method according to claim 1,
Wherein the protective layer is configured to minimize penetration of chemical substances or moisture into the second polarizing plate. The method according to claim 1,
And a first layer disposed on at least one side of four sides of the liquid crystal display device and covering side surfaces of the first substrate, the second substrate, and the second polarizer. 12. The method of claim 11,
Wherein the first layer is configured to minimize the occurrence of light leakage defects at the edges of the first substrate and the second substrate. 13. The method of claim 12,
And a second layer disposed on the first layer. 14. The method of claim 13,
And the second layer is configured to minimize penetration of chemical substances or moisture into the second polarizer plate. A method of manufacturing a liquid crystal display device including a liquid crystal panel comprising a first substrate, a second substrate, and a liquid crystal layer interposed between the first substrate and the second substrate,
Forming a first layer on a left edge, an upper edge and a right edge of the liquid crystal panel among four sides of the liquid crystal panel;
Forming a second layer on the first layer at the left edge, top edge and right edge side of the liquid crystal panel; And
And forming a protective layer between the second polarizer at the lower edge of the liquid crystal panel and the conductive tape among the four sides of the liquid crystal panel. 16. The method of claim 15,
Wherein forming the first layer comprises:
Applying ink to cover the first substrate, the second substrate, and the second polarizer on the second substrate, and curing the ink. 16. The method of claim 15,
Wherein forming the second layer comprises:
Applying an ultraviolet (UV) curable resin on the first layer, and curing the ultraviolet curable resin. 16. The method of claim 15,
The step of forming the protective layer may include:
Applying a protective layer between the second polarizer and the conductive tape so as to cover the side surface of the second polarizer, and curing the protective layer.

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