KR20170080257A

KR20170080257A - Liquid crystal display device and method of manufacturing the same

Info

Publication number: KR20170080257A
Application number: KR1020150191585A
Authority: KR
Inventors: 한상은; 박정권; 김용수; 권익현
Original assignee: 엘지디스플레이 주식회사
Priority date: 2015-12-31
Filing date: 2015-12-31
Publication date: 2017-07-10

Abstract

A manufacturing method of a liquid crystal display device is provided. A manufacturing method of a liquid crystal display device includes a step of preparing a liquid crystal display panel having a polarizing plate disposed on one side thereof. And then applying an adhesive layer on the polarizing plate. And thereafter cutting at least a part of the adhesive layer and the polarizing plate simultaneously using a laser beam. According to the method of manufacturing a liquid crystal display device according to an embodiment of the present invention, an adhesive layer and at least a part of the polarizing plate are removed by using a laser beam to remove an unnecessary space of the adhesive layer and the polarizing plate to produce a liquid crystal display device having a narrower bezel . Also disclosed is a liquid crystal display device manufactured by the above-described manufacturing method.

Description

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

The present invention relates to a liquid crystal display device and a method of manufacturing the same, and more particularly, to a liquid crystal display device for implementing a narrow bezel and a method of manufacturing the same.

BACKGROUND ART [0002] Liquid crystal displays (LCDs) are used in various fields due to various advantages such as light weight, thinness, and low power consumption driving. In the liquid crystal display device, the transmission amount is controlled according to the image signal applied to the sub-pixels, and a desired image is displayed on the screen.

Recently, attention has been paid to the external factors of the liquid crystal display device as well as the functional elements such as image quality, response speed and contrast ratio as factors for enhancing the performance and value of the liquid crystal display device.

Accordingly, there is a growing demand for a liquid crystal display device having a narrow bezel which is lightweight and thin and has a wide display area and a bezel area which is a non-display area other than the display area as small as possible .

1 is a schematic exploded perspective view for explaining a conventional liquid crystal display device. 2 is a schematic cross-sectional view illustrating a liquid crystal display device according to II-II 'of FIG.

1 and 2, the liquid crystal display device 10 includes a liquid crystal display panel 20 and a cover window 30 disposed on the liquid crystal display panel 20. The liquid crystal display panel 20 includes a lower polarizer 21, a lower substrate 22, a liquid crystal layer, an upper substrate 23, and an upper polarizer 24.

The lower polarizer 21 polarizes light emitted from the backlight unit. On the lower substrate 22, a thin film transistor (TFT), a pixel electrode electrically connected to the thin film transistor, and a common electrode capable of forming an electric field with the pixel electrode are disposed. The upper substrate 23 is opposed to the lower substrate 22 as a substrate for supporting the color filter layer. The liquid crystal layer is disposed between the upper substrate 23 and the lower substrate 22. The upper polarizer 24 polarizes the light that has passed through the upper substrate 23 and emits it to the upper portion of the upper polarizer 24.

A dam 41 blocking the adhesive liquid 45 is formed on the upper surface of the upper polarizer 24 so that the adhesive liquid 45 and the adhesive liquid 45 do not overflow. That is, the dam 41 is formed along the edge of the upper polarizer 24 to prevent the adhesive liquid 45 from leaking. The dam 41 is generally formed to have an inclined surface. Accordingly, the dam 41 is arranged to have a constant width. Here, the width of the dam 41 may be, for example, 0.5 to 0.8 mm.

A light shielding layer 31 is provided on the lower surface of the cover window 30. The light shielding layer 31 is generally disposed corresponding to the non-display area NDA. Accordingly, the non-display area NDA of the liquid crystal display device 10 is not visually recognized from the outside.

The dam 41 is disposed on the upper polarizer 24. The light shielding layer 31 formed in the cover window 30 should sufficiently cover the dam 41 so that the dam 41 is not visible from the outside. However, if the light shielding layer 31 is disposed so as to sufficiently cover the dam 41, the size of the light shielding layer 31 becomes large due to the constant width of the dam 41, which limits the implementation of the narrow bezel .

Accordingly, for the implementation of the low-bezel, only a part of the dam 41 is disposed so as to cover the light-shielding layer 31, as shown in Fig. However, when the dam 41 formed so as to have the inclined surface is disposed so as to be partially covered by the light shielding layer 31, there arises a problem that the inclined surface of the dam 41 is visually recognized from the outside.

[Related Technical Literature]

1. Liquid crystal display device (Korean Patent Application No. 10-2009-0001754)

The inventors of the present invention have recognized that it is difficult to make the area of the bezel narrower in the process of providing the dam so that the adhesive liquid applied to the upper polarizer does not flow out of the upper polarizer. Specifically, it has been recognized that the width of the light-shielding layer increases due to the inclined surface of the dam disposed along the edge of the upper polarizer, making it difficult to implement the low-beam bezel.

In order to solve the above-described problems, the inventors of the present invention have invented a new liquid crystal display device capable of realizing a narrow bezel by implementing a new structure without providing a dam to block the flow of the adhesive liquid, and a method of manufacturing the same Respectively.

Accordingly, a problem to be solved by the present invention is to provide a liquid crystal display device capable of realizing a narrow bezel because the adhesive liquid does not adversely affect the configurations of the upper polarizer, And a method for manufacturing the same.

The problems 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.

A method of manufacturing a liquid crystal display device according to an embodiment of the present invention is provided. A manufacturing method of a liquid crystal display device includes a step of preparing a liquid crystal display panel having a polarizing plate disposed on one side thereof. And then applying an adhesive layer on the polarizing plate. And thereafter cutting at least a part of the adhesive layer and the polarizing plate simultaneously using a laser beam. According to the method of manufacturing a liquid crystal display device according to an embodiment of the present invention, an adhesive layer and at least a part of the polarizing plate are removed by using a laser beam to remove an unnecessary space of the adhesive layer and the polarizing plate to produce a liquid crystal display device having a narrower bezel .

The liquid crystal display panel includes a lower substrate and an upper substrate disposed on an upper portion of the lower substrate. The polarizer may have a larger area than the upper substrate and the lower substrate.

In the step of applying the adhesive layer, the adhesive layer may be applied to the upper part of the polarizing plate so as to cover the area corresponding to the upper substrate and the lower substrate.

The polarizer includes protrusions protruding outwardly from the upper substrate, and the protrusions can be cut at the same time using the laser beam.

In the step of cutting using the laser beam, the protrusion of the polarizer is cut at least one region of the left, right and upper sides, and the line to be cut of the protrusion can correspond to the end of the upper substrate.

In the step of cutting using the laser beam, the bottom line at which the projecting portion of the polarizing plate is cut may be disposed inside the lower end portion of the upper substrate.

Prior to the step of cutting with the laser beam, the step of hardening the applied adhesive layer.

And after the step of cutting with the laser beam, attaching the cover window to the adhesive layer.

A liquid crystal display according to an embodiment of the present invention is provided. The liquid crystal display device includes a liquid crystal display panel. The adhesive layer is applied on top of the liquid crystal display panel. The cover window is disposed at the top of the adhesive layer to cover the liquid crystal display panel. The liquid crystal display panel includes a lower substrate, an upper substrate disposed on an upper portion of the lower substrate, and a polarizer disposed on the upper substrate. The polarizer has a length corresponding to at least one direction of the upper substrate.

The adhesive layer may be arranged so as to correspond to the area of the polarizing plate on the polarizing plate.

The adhesive layer can be applied to the entire surface of the polarizing plate.

The side surfaces of the adhesive layer and the polarizing plate may have a smooth surface.

At a level where the adhesive layer is disposed, it can be constructed so that there is no dam that is in contact with the adhesive layer and is constructed such that the adhesive layer does not flow.

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

The present invention is characterized in that an upper polarizer plate having a lower substrate provided with a thin film transistor and an upper substrate provided with a color filter is disposed on the upper surface of the upper substrate and then an adhesive layer is applied to the upper surface of the upper polarizer plate, The adhesive layer can be applied irrespective of the flow, and the process yield and productivity of the liquid crystal display device can be improved.

The upper adhesive layer may be formed on the upper surface of the upper substrate by cutting the upper polarizer and the adhesive layer to correspond to the size of the upper substrate or the lower substrate, It is possible to realize a liquid crystal display device having a thinner bezel without a dam for preventing the liquid from flowing down.

The effects according to the present invention are not limited by the contents exemplified above, and more various effects are included in the specification.

1 is a schematic exploded perspective view for explaining a conventional liquid crystal display device.
2 is a schematic cross-sectional view illustrating a liquid crystal display device according to II-II 'of FIG.
3 is a schematic exploded perspective view illustrating a liquid crystal display device according to an embodiment of the present invention.
4 is a schematic cross-sectional view for explaining a liquid crystal display according to IV-IV 'of FIG.
5 is a cross-sectional view illustrating a method of manufacturing a liquid crystal display device according to an embodiment of the present invention.
6 is a plan view for explaining a liquid crystal display device shown in FIG. 5 (a).
7 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. The present invention may, however, be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. Is provided to fully convey 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. 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.

It will be understood that when an element or layer is referred to as being on another element or layer, it encompasses the case where it is directly on or intervening another element or intervening another element or element.

Although the first, second, etc. are used to describe various components, 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.

Like reference numerals refer to like elements throughout the specification.

The sizes and thicknesses of the individual components shown in the figures are shown for convenience of explanation and the present invention is not necessarily limited to the size and thickness of the components shown.

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 entirely and technically various interlocking and driving is possible as will be appreciated by those skilled in the art, It may be possible to cooperate with each other in association.

Various embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

3 is a schematic exploded perspective view illustrating a liquid crystal display device according to an embodiment of the present invention. 4 is a schematic cross-sectional view for explaining a liquid crystal display according to IV-IV 'of FIG. Referring to FIGS. 3 and 4, the liquid crystal display according to an exemplary embodiment of the present invention includes a liquid crystal display panel 110, an adhesive layer 130, and a cover window 120.

The liquid crystal display panel 110 includes a lower polarizer 111, a lower substrate 112, a liquid crystal layer, an upper substrate 113, and an upper polarizer 114.

The lower polarizer 111 polarizes light emitted from the backlight unit. Specifically, the lower polarizer 111 polarizes light from the backlight unit to provide it to the liquid crystal layer.

The lower substrate 112 is a substrate for supporting various components constituting the liquid crystal display panel 110. A thin film transistor (TFT), a pixel electrode electrically connected to the thin film transistor, and a common electrode capable of forming an electric field with the pixel electrode may be disposed on the lower substrate 112. Thus, the lower substrate 112 may be referred to as a thin film transistor substrate. The thin film transistor can form an electric field between the pixel electrode and the common electrode based on the driving signal transmitted through the wiring.

The lower substrate 112 includes a display area DA for displaying an image and a non-display area NDA arranged to surround the display area DA. A driving thin film transistor for driving a pixel and a pixel is disposed in the display area DA, and wirings and a gate driving circuit may be disposed in the non-display area NDA.

The upper substrate 113 is disposed so as to be opposed to the lower substrate 112. The upper substrate 113 can be referred to as a color filter substrate as a substrate for supporting a color filter layer. The color filter layer selectively transmits light of a specific wavelength. The common electrode may be disposed on the lower substrate 112 and the pixel electrode may be disposed on the lower substrate 112 according to the driving method of the liquid crystal display panel 110 and the common electrode may be disposed on the upper substrate 113, As shown in FIG.

A liquid crystal layer is disposed between the upper substrate 113 and the lower substrate 112. A plurality of liquid crystal molecules are arranged in the liquid crystal layer and the liquid crystal molecules are arranged in a predetermined direction by an alignment film in the upper substrate 113 or the lower substrate 112 before an electric field due to a voltage difference between the pixel electrode and the common electrode is formed have. When the electric field between the pixel electrode and the common electrode is formed, the liquid crystal molecules are tilted in a direction different from the predetermined direction so that the transmissivity of the light emitted from the backlight unit is controlled to display the image.

The upper polarizer 114 polarizes light passing through the upper substrate 113 and emits the polarized light to the upper portion of the upper polarizer 114. The upper polarizer 114 may be disposed so that its length in the width direction corresponds to that of the upper substrate 113.

The adhesive layer 130 is disposed on the liquid crystal display panel 110. Specifically, the adhesive layer 130 is disposed on the upper portion of the upper polarizer 114. That is, the adhesive layer 130 is disposed on the entire surface of the upper polarizer 114 and is arranged to have the same size and the same area as the upper polarizer 114. The reason why the upper polarizer 114 and the adhesive layer 130 have the same size and the same area is that the upper polarizer 114 is arranged so as to have a larger size than the upper substrate 113 and the lower substrate 112, The adhesive layer 130 for adhesion with the cover window 120 is formed on the entire surface of the upper polarizer 114 and then the upper polarizer 114 and the adhesive layer 130 are bonded to the upper substrate 113 or the lower substrate 112 The laser beam is simultaneously cut. This will be described in detail with reference to FIGS. 5 to 7. FIG. In addition, the adhesive layer 130 may be made of a resin that can be cured by applying heat.

The side surfaces of the adhesive layer 130 and the upper polarizer plate 114 have a smooth surface. Specifically, the adhesive layer 130 and the upper polarizer 114 are arranged to have a larger size than the upper substrate 113 or the lower substrate 112, and then the upper substrate 113 and the lower substrate 112 The upper substrate 113 or the lower substrate 112 is cut to a size equal to that of the upper substrate 113 or the lower substrate 112. In this case, And the side surface of the upper polarizer 114 have a continuous surface. On the other hand, in the structure employing the dam, the adhesive layer 130 and the upper polarizer 114 may not have continuous surfaces.

The cover window 120 is disposed at the top of the adhesive layer 130. The cover window 120 is adhered to the liquid crystal display panel 110 by the adhesive layer 130 and disposed to cover the liquid crystal display panel 110. The cover window 120 can prevent foreign substances from being injected into the liquid crystal display panel 110 and protect the liquid crystal display panel 110 from an external impact. The cover window 120 may be made of transparent glass or plastic.

The light shielding layer 121 is disposed in an outer area of the cover window 120 facing the liquid crystal display panel 110. The light shielding layer 121 may be formed by various circuits and wirings arranged in the non-display area NDA of the liquid crystal display panel 110 and various structures that can be arranged in the non- display area NDA of the liquid crystal display panel 110 It blocks what is being acknowledged by. Thus, the light shielding layer 121 is arranged to correspond to the non-display area NDA.

The light-shielding layer 121 may be made of a material capable of absorbing light. For example, the light shielding layer 130 may be formed of a black matrix or may be formed by printing black ink.

As described above, the liquid crystal display device 100 according to an embodiment of the present invention includes a dam which is configured to contact the adhesive layer 130 on the same plane where the adhesive layer 130 is disposed and to prevent the adhesive layer 130 from flowing. Not provided. 3 and 4, a dam is not provided in the layer where the adhesive layer 130 is provided to prevent the adhesive layer 130 from flowing through the adhesive layer 130. This is because the upper polarizer 114 is larger than the upper substrate 113 and the lower substrate 112 and the adhesive layer 130 is formed irrespective of the overflow phenomenon of the adhesive and the upper substrate 113 and the lower substrate 112 Since the upper polarizer 114 and the adhesive layer 130 are cut, it is not necessary to provide a dam for blocking the adhesive layer 130. [ Even if a dam is provided on the upper polarizer 114, the upper polarizer 114 may be arranged larger than the upper substrate 113 or the lower substrate 112, and a dam may be provided on an outer area of the upper polarizer 114 The dam must be cut through the laser beam.

The liquid crystal display device 100 according to an embodiment of the present invention can remove the constant width of the dam because the dam is not provided to prevent the overflow of the adhesive layer 130. Therefore, , The width of the non-display area NDA of the upper substrate 113 and the lower substrate 112 can be shortened. That is, the area of the light shielding layer 121 disposed on the lower surface of the cover window 120 can be reduced. As described above, since the liquid crystal display device 100 according to an embodiment of the present invention does not require a space for providing a dam, a narrow bezel on the side can be realized.

5 is a cross-sectional view illustrating a method of manufacturing a liquid crystal display device according to an embodiment of the present invention. 6 is a plan view for explaining a liquid crystal display device shown in FIG. 5 (a). 7 is a flowchart illustrating a method of manufacturing a liquid crystal display device according to an embodiment of the present invention. 6 is a plan view for explaining a state in which the upper substrate 113 and the lower substrate 112 are superimposed on the lower part of the upper polarizer 114. As shown in FIG. 6 is shown with the cover window 120 and the adhesive layer 130 omitted for ease of explanation. For the sake of convenience of description, a description overlapping with FIGS. 3 and 4 will be omitted.

First, referring to FIGS. 5 and 7 together, FIG. 5A shows a step S10 of preparing the liquid crystal display panel 110. FIG. 5 (b) shows the step S20 of applying the adhesive layer 130 on the upper polarizer 114. As shown in FIG. 5C shows a step S40 of cutting the applied adhesive layer 130 and the upper polarizer 114 using a laser beam. 5 (d) shows a state after a part of the adhesive layer 130 and the upper polarizer 114 are cut. 5 (e) shows a step (S50) of attaching the cover window 120 to the top of the adhesive layer 130.

Referring to FIG. 5A, the liquid crystal display panel 110 includes a lower polarizer 111, a lower substrate 112, an upper substrate 113, and an upper polarizer 114. At this time, the upper polarizer 114 is arranged to have a wider area than the upper substrate 113 and the lower substrate 112. 5 (a), the upper polarizer 114 is disposed so as to cross both ends of the upper substrate 113 and the lower substrate 112, that is, the upper substrate 113 and the upper substrate 113, And is arranged to have a size larger than the size of the lower substrate 112. As a result, the upper polarizer plate 114 has a larger area to cover the upper substrate 113 and the lower substrate 112.

The upper polarizer 114 includes protrusions 114a, 114b, 114c, and 114d protruding outward from the upper substrate 113. 6, the protrusions 114a, 114b, 114c, and 114d include a first protrusion 114a protruded to the left from the upper substrate 113 and the lower substrate 112, a second protrusion 114a protruding to the left from the second protrusion 114a, A third projection 114c projecting upward, and a fourth projection 114d projecting downward. Cutting lines L1, L2, L3, and L4 for cutting the protruding portions 114a, 114b, 114c, and 114d are disposed by using a laser beam to be described later.

Referring to FIG. 5 (b), the adhesive layer 130 is applied to the upper portion of the upper polarizer 114. More specifically, the adhesive layer 130 is applied to the upper portion of the upper polarizer 114 so as to cover the area corresponding to the upper substrate 113. More specifically, it is sufficient that the adhesive layer 130 is applied to a wider range in the outward direction than the cutting line arranged in the upper polarizer 114. For example, referring to FIG. 6, it is sufficient that the adhesive layer 130 is coated to cover the cutting lines L1, L2, L3, and L4. In the present embodiment, the adhesive layer 130 is formed to cover the area corresponding to the upper substrate 113, but the present invention is not limited thereto. For example, the adhesive layer 130 may be disposed at the end of the upper polarizer 114. This means that the adhesive liquid constituting the adhesive layer 130 may be arranged overflow. This is because the adhesive layer 130 is formed to be larger than the upper substrate 113 and the lower substrate 112 which display an image and therefore the adhesive layer 130 is affected by the display quality of the upper substrate 113 and the lower substrate 112 . Since the upper polarizing layer 114 and the adhesive layer 130 which are formed larger than the upper substrate 113 and the lower substrate 112 in the subsequent process are removed through a cutting process, the upper polarizer 114 and the lower substrate 112 are bonded Liquid can be applied.

5C, the applied adhesive layer 130 and the upper polarizer 114, which are disposed to a greater extent than the upper substrate 113 and the lower substrate 112, Is cut by a laser beam so as to correspond to the size of the substrate 112, that is, the area of the upper polarizer 114 and the adhesive layer 130 is the same as that of the upper substrate 113 and the lower substrate 112. The adhesive layer 130 and the upper polarizer 114 are simultaneously cut by the laser beam. 5 (c) and 6, the first protrusion 114a and the second protrusion 114b, which protrude from both sides of the upper substrate 113 and the lower substrate 112, Is cut by the laser beam along the line L1 and the second cutting line L2. On the other hand, the third projection 114c and the fourth projection 114d can also be cut by the laser beam along the third cutting line L3 and the fourth cutting line L4. At this time, the fourth cutting line L4 is disposed inside the direction of the display area DA than the end of the upper substrate 113. [ This is because the driving circuit and the like are disposed in the non-display area NDA of the lower substrate 112 so that the upper polarizer 114 and the adhesive layer 130 are cut by a width corresponding to the display area DA Because.

Such a cutting process can be repeated a plurality of times. This is because a laser beam is used to simultaneously cut the upper polarizing layer 114 and the adhesive layer 130 which are disposed larger than the upper substrate 113 and the lower substrate 112. The laser beam is cut at a high temperature Because the hardened adhesive layer 130 can flow down and affect other structures. In order to minimize the influence of the adhesive layer 130 disposed on the upper polarizer 114 on the cutting surface due to melting and falling down, Therefore, when the laser beam is irradiated a plurality of times, only the adhesive layer 130 and the upper polarizer 114 can be cut.

5 (d), the side surfaces of the cut adhesive layer 130 and the upper polarizer 114 are the same as the side surfaces of the upper substrate 113, the lower substrate 112 and the lower polarizer 111 disposed below Plane. At this time, the upper substrate 113, the lower substrate 112, and the lower polarizer 111 may be formed in accordance with a standard for implementing the narrow bezel. Accordingly, the liquid crystal display device 100 according to an embodiment of the present invention includes the upper substrate 113 and the upper substrate 113, which are adapted to the inner bezel, without providing a dam to prevent the adhesive layer 130 from being lost. By forming the upper polarizer and the adhesive layer so as to correspond to the lower substrate 112, the bezel region can be formed smaller than the conventional liquid crystal display device.

Referring to FIG. 5E, a cover window 120 is attached to the top of the adhesive layer 130. The cover window 120 is formed to cover the adhesive layer 130 and the upper polarizer plate 114. After the cover window 120 is adhered, the defoaming step S60 for removing air and the main curing step S70 for curing the adhesive layer 130 are performed to form the liquid crystal display 100 according to an embodiment of the present invention Is completed.

Referring to FIG. 7, a method of manufacturing a liquid crystal display device 100 according to an embodiment of the present invention will now be described with reference to FIG. 7, A step of applying adhesive layer 130 (S20), a step of hardening adhesive layer 130 (S30), a step of forming adhesive layer 130 and a part of upper polarizer plate 114 by using a laser beam (S50) of attaching the cover window 120 to the upper part of the adhesive layer 130 (S50), a defoaming step (S60) of removing the air contained in the adhesive layer 130, and an adhesive layer 130 And a final curing step (S70) for curing.

The step S10 of preparing the liquid crystal display panel 110 includes the step of aligning the upper polarizer 114 having a wider area than the upper substrate 113 and the lower substrate 112 with the liquid crystal display panel (110). The upper polarizer 114 is cut to correspond to the upper substrate 113 and the lower substrate 112 and the upper substrate 113 disposed below the upper polarizer 114, And the adhesive layer 130 overflowing from the upper polarizer 114 to the lower substrate 112 and the like is not applied to the lower structure.

In the step S20 of applying the adhesive layer 130, the adhesive layer 130 is applied on the upper polarizer plate 114. 6, the adhesive layer 130 may be applied to cover the first to fourth cutting lines L1, L2, L3, and L4 disposed on the upper polarizer plate 114. In this case,

The step of hardening the adhesive layer 130 (S30) is a step of hardening the adhesive layer 130 applied on the upper polarizer 114 to have a predetermined strength. When the adhesive layer 130 is not cured to a predetermined strength, the adhesive layer 130 can be melted by the laser beam for cutting the upper polarizer 114 and the adhesive layer 130. In addition, the surfaces of the cut upper polarizer plate 114 and the adhesive layer 130 may not be smooth due to the melted adhesive layer 130. Therefore, the adhesive layer 130 is made thinner so that the upper polarizer plate 114 and the adhesive layer 130 can be smoothly cut by the laser beam.

The step S40 of cutting the adhesive layer 130 and a part of the upper polarizer 114 by using a laser beam is performed in such a manner that the laser beam is moved along the cutting lines L1, L2, L3, And the polarizing plate 114 is cut. At this time, the strength of the laser beam may be adjusted to control the adhesion of the adhesive layer 130 so that the laser beam is not irradiated onto the upper substrate 113 and the following components below the upper polarizer 114.

Step S50 of attaching the cover window 120 on the adhesive layer 130 attaches the cover window 120 to the top of the adhesive layer 130. The defoaming step S60 for removing the air contained in the adhesive layer 130 is a step for removing the air bubbles by inserting the liquid crystal display device 100 into the defoaming chamber to remove the air bubbles contained in the adhesive layer 130. [

The final curing step S70 for curing the adhesive layer 130 is a step of sufficiently curing the adhesive layer 130 which is not hardened to a sufficient strength. The hardening step is a step of hardening the adhesive layer 130 at such an intensity that the adhesive layer 130 can be cut without melting the adhesive layer 130 by the laser beam, So that the cover window 120 and the liquid crystal display panel 110 are firmly adhered to each other so as not to be separated from the liquid crystal display panel 110.

The liquid crystal display device 100 according to an embodiment of the present invention includes a member such as a dam that blocks the adhesive layer 130 so that the adhesive layer 130 applied on the upper polarizer 114 does not flow out of the upper polarizer 114 . Thus, the side bezel area beyond the length of the dam can be reduced. Thus, the liquid crystal display device 100 having the low-bezel can be realized.

In addition, according to the method of manufacturing a liquid crystal display device according to an embodiment of the present invention, an adhesive layer is coated on an upper polarizer, and then an unnecessary portion is cut using a laser beam to manufacture a liquid crystal display can do.

Although the embodiments of the present invention have been described in detail with reference to the accompanying drawings, it is to be understood that the present invention is not limited to those embodiments and various changes and modifications may be made without departing from the scope of the present invention. . 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. The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100: liquid crystal display
110: liquid crystal display panel
111: lower polarizer plate
112: Lower substrate
113: upper substrate
114: Upper polarizer
114a: first protrusion
114b: second projection
114c: third projection
114d: fourth protrusion
120: Cover window
121: Shading layer
130: Adhesive layer
L1: 1st cutting line
L2: 2nd cutting line
L3: 3rd cutting line
L4: Fourth cutting line

Claims

Preparing a liquid crystal display panel having a polarizing plate disposed on one side thereof;
Applying an adhesive layer on the polarizing plate; And
And simultaneously cutting at least a part of the adhesive layer and the polarizing plate by using a laser beam.

The method according to claim 1,
In the liquid crystal display panel,
A lower substrate; And
And an upper substrate disposed on the upper substrate,
The polarizing plate includes:
Wherein the upper substrate and the lower substrate have a larger area than the upper substrate and the lower substrate.

3. The method of claim 2,
Wherein the step of applying the adhesive layer comprises:
Wherein an adhesive layer is applied to an upper portion of the polarizing plate so as to cover an area corresponding to the upper substrate and the lower substrate.

3. The method of claim 2,
Wherein the polarizer includes a protrusion protruding outward from the upper substrate,
Wherein the projecting portion is cut at a time of cutting simultaneously using the laser beam.

5. The method of claim 4,
Wherein at least one region of the left, right, and upper sides of the protrusion of the polarizer is cut in a step of cutting using the laser beam, and a line to be cut of the protrusion corresponds to an end of the upper substrate, Way.

5. The method of claim 4,
Wherein a lower end line of the protrusion of the polarizer is cut in a step of cutting using the laser beam, the lower end line being disposed inside the lower end of the upper substrate.

The method according to claim 1,
Before the step of cutting using the laser beam,
And curing the applied adhesive layer. &Lt; Desc / Clms Page number 19 >

The method according to claim 1,
After the step of cutting with the laser beam,
And adhering a cover window to the adhesive layer.

A liquid crystal display panel;
An adhesive layer applied on the liquid crystal display panel; And
And a cover window disposed on the top of the adhesive layer and covering the liquid crystal display panel,
In the liquid crystal display panel,
A lower substrate;
An upper substrate disposed on the upper substrate; And
And a polarizer disposed on the upper substrate,
The polarizing plate includes:
And the length of the upper substrate corresponds to the length of at least one direction.

10. The method of claim 9,
And the adhesive layer is disposed on the polarizing plate so as to correspond to the area of the polarizing plate.

11. The method of claim 10,
Wherein the adhesive layer is applied to the entire surface of the polarizing plate.

10. The method of claim 9,
And the side surfaces of the adhesive layer and the polarizing plate have smooth surfaces.

10. The method of claim 9,
At the level where the adhesive layer is disposed,
Wherein the damper is configured to be free from a dam that is in contact with the adhesive layer and is configured such that the adhesive layer does not flow.