KR20170107170A - Alignment device for liquid crystal display module and cover glass and method of manufacturing liquid crystal display device using the same - Google Patents

Abstract

The present invention provides an alignment device of a liquid crystal display module and a cover glass and a manufacturing method of a liquid crystal display device using the same. The alignment device of the liquid crystal display module and the cover glass comprises: a supporting unit; a camera unit; and a pressurization unit. The supporting unit supports the liquid crystal display module and is movable. The camera unit captures the cover glass so as to test alignment of the cover glass adhered to a filling member of the liquid crystal display module. The pressurization unit pressures the cover glass, and configured to pressure a specific part of an edge of an upper substrate of the liquid crystal display module.

Description

TECHNICAL FIELD The present invention relates to a liquid crystal display module, a cover glass alignment device, and a method of manufacturing a liquid crystal display device using the same. BACKGROUND ART [0002]

More particularly, the present invention relates to a liquid crystal display module for manufacturing a liquid crystal display device in which light leakage phenomenon is minimized and durability is improved, and a method of manufacturing a liquid crystal display module using the cover glass. And a method of manufacturing a liquid crystal display using the same.

BACKGROUND ART A liquid crystal display (LCD) is a display device that implements an image in such a manner that a light source is disposed under a liquid crystal and an electric field is applied to the liquid crystal to control the arrangement of liquid crystal to pass or block light generated in the light source . Since a liquid crystal display device has a thinner thickness and a clearer image quality than a cathode ray tube (CRT) display device, the liquid crystal display device is applied to a TV, a monitor, and the like, and is recently widely used as a display device of a portable terminal such as a smart phone or a tablet PC have.

Since the liquid crystal display implements an image by controlling the arrangement of the liquid crystals, it is necessary to keep the initial arrangement of the liquid crystals constant. If the arrangement of the initial liquid crystals is locally turned off, the arrangement of the liquid crystals can not be controlled as desired, resulting in unevenness on the screen or leakage of light between the misaligned liquid crystals. Accordingly, researches for analyzing the causes of light leakage in a liquid crystal display device and reducing light leakage are actively underway. In addition, since the liquid crystal display device is applied to a portable terminal such as a smart phone, a tablet PC and the like, the durability of the liquid crystal display device becomes important, and studies for improving the durability of the liquid crystal display device are actively underway.

There are various factors that cause light leakage in the liquid crystal display device and factors that reduce the durability. However, the lower substrate of the liquid crystal display device may be bent to generate light leakage, and the lower substrate of the liquid crystal display device may be easily damaged by the impact. For a more detailed description thereof, reference is made to Figs. 1A and 1B.

FIG. 1A is a schematic perspective view illustrating a light leakage phenomenon and a durability reduction phenomenon occurring in a liquid crystal display device. FIG. 1B is a schematic cross-sectional view taken along line I-I 'of FIG. 1A for explaining a light leakage phenomenon and a durability reduction phenomenon generated in a liquid crystal display device.

1A and 1B, a liquid crystal display device 100 includes a liquid crystal display module 110 and a cover glass 130 that covers the liquid crystal display module 110, and includes a liquid crystal display module 110, (130) are bonded to each other using a transparent bonding member (121). 1B, the liquid crystal display module 110 includes an upper substrate 111 and a lower substrate 112. The upper substrate 111 and the lower substrate 112 are bonded together by a sealant 113, A liquid crystal LC is disposed between the upper substrate 111 and the lower substrate 112. The liquid crystal display module 110 receives a signal from the display printed circuit board 140 and implements an image based on the received signal. The liquid crystal display module 110 is in contact with the display printed circuit board 140 in the pad area PA and the display printed circuit board 140 in the pad area PA is in contact with the lower substrate 111 of the liquid crystal display module 110. [ / RTI > When the liquid crystal display module 110 includes a touch screen panel (TSP), a touch print circuit board 150 for receiving a touch signal is connected to the liquid crystal display module 110 in the pad area PA. The lower substrate 111 of the substrate 100 is brought into contact with the lower substrate 111.

The display printed circuit board 140 and the touch printed circuit board 150 should be in contact with the wirings disposed on the lower substrate 111 of the liquid crystal display module 110. [ Thus, the upper substrate 112 can not be disposed on the lower substrate 111 of the pad region PA, and the lower substrate 111 is exposed alone in the pad region PA. Accordingly, the pad area PA of the liquid crystal display module 110 has a durability that is relatively weaker than the non-pad area NPA.

The filling member 160 is disposed between the lower substrate 111 of the pad area PA and the cover glass 130 to reinforce the fragile durability of the pad area PA of the liquid crystal display module 110. [ However, since the filling member 160 is a rigid member for firmly adhering the cover glass 130 and the lower substrate 111, the filling member 160 is not deformed well. Particularly, due to the rigidity of the filling member 160, the problem of bending the lower substrate 111 frequently occurs in the process of bonding the cover glass 130 and the liquid crystal display module 110, The bending causes light leakage of the liquid crystal display device 100. Also, since the rigidity of the filling member 160 is insufficient to buffer the impact applied to the lower substrate 111, the lower substrate 111 may be easily damaged by an external impact.

1B, the liquid crystal display module 110 and the cover glass 130 are adhered to each other by the transparent adhesive member 121. In the process of adhering the liquid crystal display module 110 and the cover glass 130 Is as follows. First, after a dam 122 is formed on the upper substrate 112, a composition for a transparent bonding member is applied on the upper substrate 112. In addition, a composition for a filling member for forming the filling member 160 is applied on the lower substrate 111 of the pad region PA. Here, the dam 122 prevents the composition for the transparent bonding member from overflowing when the composition for the transparent bonding member is applied on the upper substrate 112, and prevents the composition for the transparent bonding member from hardening do. The cover glass 130 is then pressed such that the cover glass 130 is aligned on the liquid crystal display module 110 and the lower surface of the cover glass 130 is contacted with the composition for the filling member. In this case, since the contact surface between the composition for the filling member and the cover glass 130 needs to be maximized, the cover glass 130 is excessively pressurized and the dam 122 is also partially compressed by the pressure.

Thereafter, with the cover glass 130 being pressed, the composition for the filling member is cured to form the filling member 160. The filling member 160 adheres the cover glass 130 and the liquid crystal display module 110 to each other until the composition for the transparent bonding member is cured and the alignment of the cover glass 130 and the liquid crystal display module 110 is performed, . On the other hand, since the transparent bonding member 121 covers the active area in which the image is displayed in the non-pad area NPA, there is no air bubble between the transparent bonding member 121 and the cover glass 130. If bubbles are present, a decrease in visibility due to bubbles may occur. Therefore, a process for removing air bubbles between the composition for the transparent bonding member and the cover glass 130 is necessarily performed before the composition for the transparent bonding member is cured. The filling member 160 maintains alignment between the cover glass 130 and the liquid crystal display module 110 during the process of removing bubbles. The adhesive force of the composition for a transparent bonding member is weak before being cured. If the filling member 160 is not provided, alignment of the cover glass 130 and the liquid crystal display module 110 in the process of removing bubbles may be interrupted. Therefore, a member capable of maintaining the alignment of the cover glass 130 and the liquid crystal display module 110 during the bubble removing process is required, and the filling member 160 performs this function. That is, the composition for the filling member is cured before the composition for the transparent bonding member is cured, and the filling member 160 bonds the cover glass 130 and the lower substrate 111 of the liquid crystal display module 110, The alignment of the cover glass 130 and the liquid crystal display module 110 by the member 160 can be maintained.

In this case, in order to maintain the alignment of the cover glass 130 and the liquid crystal display module 110, the filling member 160 needs to have a large modulus and a small elongation. That is, the filling member 160 maintains the alignment between the cover glass 130 and the liquid crystal display module 110 and maintains a small elongation percentage to maintain the distance between the cover glass 130 and the liquid crystal display module 110 constant. . When the alignment between the cover glass 130 and the liquid crystal display module 110 is interrupted, the filling member 160 may have a large modulus such that the cover glass 130 and the liquid crystal display module 110 are returned to the initial alignment . That is, the filling member 160 should have sufficient rigidity.

On the other hand, when the pressure applied to the cover glass 130 is released to remove air bubbles between the cover glass 130 and the composition for the transparent adhesive member, the cover glass 130, due to the elastic force of the compressed dam 122, Can be increased. However, since the filling member 160 adhered to the cover glass 130 and the lower substrate 111 is a rigid member, it has a fixed thickness. 1B, the filling member 160 can be lifted together with the cover glass 130, and the lower substrate 111 bonded with the filling member 160 can be raised, Is also elevated along the cover glass 130. As a result, the lower substrate 111 is bent in the pad area PA.

The bending of the lower substrate 111 in the pad region PA can locally change the arrangement of the liquid crystal LC in the non-pad region NPA. That is, the bending of the lower substrate 111 in the pad area PA can be continued to the non-pad area NPA, and the distance between the upper substrate 112 and the lower substrate 111 in the non- . The arrangement of some liquid crystals LC 'may be locally changed as the distance between the upper substrate 112 and the lower substrate 111 becomes nonuniform in the non-pad region NPA. Particularly, the probability that the arrangement of the liquid crystal LC 'is locally changed in the region adjacent to the pad region PA is high and the light leakage occurs between the different liquid crystal LC', so that the brightness of the liquid crystal display device 100 becomes uneven .

On the other hand, since the filling member 160 is a rigid member having a large modulus and a small elongation, it may not be suitable for absorbing an external impact, and the impact applied to the lower substrate 111 in the pad region PA may be sufficiently buffered buffer). In addition, due to the bending of the lower substrate 111, stress is applied to the inside of the lower substrate 111, and the durability of the lower substrate 111 of the pad area PA can be reduced accordingly. That is, the lower substrate 111 of the pad area PA can be easily cracked even with a small impact, thereby decreasing the durability of the liquid crystal display module 110.

Thus, the durability of the liquid crystal display device can be reduced. Particularly, light leakage frequently occurs at the edge of the display area adjacent to the pad area of the liquid crystal display device, and breakage of the lower substrate frequently occurs in the pad area of the liquid crystal display device.

Liquid crystal display device (Korean Patent Application No. 2011-0037359)

The inventors of the present invention have found that the bending of the lower substrate of the pad region can be generated due to the rigidity of the filling member. The inventors of the present invention can bend the lower substrate of the pad region due to the rigidity of the filling member, And the durability of the liquid crystal display device can be reduced. Accordingly, the present inventors have invented a method for bonding a liquid crystal display module and a cover glass before a composition for a transparent bonding member is cured using a flexible filling member. However, the inventors of the present invention have recognized that, in the case of the flexible filling member, the alignment between the liquid crystal display module and the cover glass may not be sufficiently maintained, and the thickness between the cover glass and the liquid crystal display module may be uneven . Accordingly, the present inventors have proposed a liquid crystal display module, a cover glass alignment device and a liquid crystal display device using the same, which can fix a disadvantage of a flexible filling member by bonding a liquid crystal display module and a cover glass using a flexible filling member .

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a liquid crystal display module in which a flexible filling member is applied to minimize a bending of a lower substrate that may occur during a bonding process of a cover glass and a liquid crystal display module, And to provide a liquid crystal display module and a cover glass alignment device capable of absorbing impacts to improve the durability of the liquid crystal display device, and a method of manufacturing a liquid crystal display device using the same.

Another problem to be solved by the present invention is to provide a liquid crystal display module in which alignment between a liquid crystal display module and a cover glass caused by applying a flexible filling member is interrupted and a thickness of a composition for a transparent bonding member between a liquid crystal display module and a cover glass becomes uneven The present invention also provides a liquid crystal display module and a cover glass alignment device capable of improving the productivity and durability of a liquid crystal display device by solving the problem, and a method of manufacturing a liquid crystal display device using 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.

According to an aspect of the present invention, there is provided a liquid crystal display (LCD) module and a cover glass aligning apparatus including a support unit, a camera unit, and a pressure unit. The supporting unit supports the liquid crystal display module and is movable. The camera unit takes a cover glass to inspect the alignment of the cover glass adhered to the filling member of the liquid crystal display module. The pressing unit presses the cover glass, and is configured to press a specific portion of the rim of the upper substrate of the liquid crystal display module.

According to another aspect of the present invention, the pressurizing unit may include a protrusion configured to press a corner portion of the dam disposed along the rim of the upper substrate.

According to another aspect of the present invention, the projecting portion may have a specific thickness such that the thickness of the corner portion of the dam is equal to the thickness of the remaining portion except for the corner portion.

According to still another aspect of the present invention, the pressurizing unit may include a press moving unit configured to move the protrusion upward and downward, and a spring supporting the protrusion.

According to another aspect of the present invention, the pressurizing unit can pressurize the cover glass at 40 to 200 g / F.

According to another aspect of the present invention, the liquid crystal display module and the aligning device of the cover glass may further include a curing unit configured to irradiate the cover glass with ultraviolet (UV) light while the pressing unit presses the cover glass have.

According to another aspect of the present invention, the supporting unit may include a supporting unit configured to vacuum-adsorb the liquid crystal display module to fix and support the supporting unit, and a moving unit configured to move the supporting unit on the xy plane.

According to an aspect of the present invention, there is provided a method of manufacturing a liquid crystal display device, comprising: applying a composition for a filling member onto a lower substrate of a liquid crystal display module; Applying a composition for a transparent bonding member to the rim of the upper substrate of the liquid crystal display module facing the lower substrate, curing the composition for the transparent bonding member on the rim of the upper substrate to form a dam, Applying a composition for a transparent bonding member so as to cover the upper surface of the substrate, disposing a cover glass to cover the liquid crystal display module, secondly curing the composition for the first cured filling member to form a filling member adhered to the cover glass Forming a transparent adhesive composition between the upper substrate and the cover glass so as to fill both the upper substrate and the cover glass, Aligning the cover glass with the liquid crystal display module while pressing the cover glass so that the dam is compressed, and curing the composition for the transparent adhesive member filled between the cover glass and the upper substrate , And bonding the cover glass and the liquid crystal display module.

According to another aspect of the present invention, the step of aligning the cover glass and the liquid crystal display module while pressing the cover glass so that the dam is compressed includes the steps of placing the cover glass and the liquid crystal display module on the support unit, Pressing the specific portion of the cover glass corresponding to the corner portion of the dam to be compressed by the pressing unit, moving the position of the support so as to align the cover glass with the liquid crystal display module, And curing a part of the composition for the transparent bonding member between the cover glass and the upper substrate.

According to still another aspect of the present invention, the step of pressing a specific portion of the cover glass corresponding to the corner portion of the dam such that the corner portion of the dam is compressed includes pressing a specific portion of the cover glass at a pressure of 40 to 200 g / Lt; / RTI >

In accordance with another feature of the invention, the first and second curing for a curing filling member composition to form a cover glass and an adhesive filling member, the filling member is 9 × 10 ⁶ a modulus (modulus) of the Pa or less And then curing it to have.

According to still another aspect of the present invention, the step of second curing the composition for the first cured filling member to form the filling member adhered to the cover glass comprises curing the filling member to have elongation of 300% or more . ≪ / RTI >

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

The present invention has the effect of minimizing the light leakage caused by the deformation of the lower substrate and improving the durability of the liquid crystal display device by using a filling member having a low modulus and a high elongation.

The present invention minimizes the alignment error due to the low modulus of the filling member by aligning the liquid crystal display module and the cover glass using the liquid crystal display module and the aligner of the cover glass after removing the bubble of the composition for the transparent bonding member .

The present invention can correct the thickness of the unevenly thickened dam in the process of removing air bubbles of the composition for a transparent bonding member by pressing a specific part of the cover glass using the liquid crystal display module and the aligning device of the cover glass, The thickness between the display module and the cover glass can be made uniform.

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

FIG. 1A is a schematic perspective view illustrating a light leakage phenomenon and a durability reduction phenomenon occurring in a liquid crystal display device. FIG.
1B is a schematic cross-sectional view taken along line I-I 'of FIG. 1A for explaining a light leakage phenomenon and a durability reduction phenomenon generated in a liquid crystal display device.
2A is a schematic plan view illustrating a liquid crystal display according to an embodiment of the present invention.
FIG. 2B is a schematic cross-sectional view taken along line II-II 'of FIG. 2A for explaining a liquid crystal display device according to an embodiment of the present invention.
3 is a flowchart illustrating a method of manufacturing a liquid crystal display device according to an embodiment of the present invention.
4A to 4E are schematic cross-sectional views illustrating a method of manufacturing a liquid crystal display device according to an embodiment of the present invention.
5A to 5F are schematic perspective views illustrating a liquid crystal display module and a cover glass alignment device according to an embodiment of the present invention.
6A to 6C are schematic cross-sectional views and graphs for explaining improved alignment accuracy of a liquid crystal display device according to an embodiment of the present invention.
7A to 7C are schematic cross-sectional views and graphs for explaining thickness uniformity between a cover glass and a liquid crystal display module improved in a liquid crystal display 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. 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.

An element or layer is referred to as being another element or layer "on ", including both intervening layers or other elements directly on or in between.

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 wholly, technically various interlocking and driving, and that the embodiments may be practiced independently of each other, It is possible.

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

2A is a schematic plan view illustrating a liquid crystal display according to an embodiment of the present invention. FIG. 2B is a schematic cross-sectional view taken along line II-II 'of FIG. 2A for explaining a liquid crystal display device according to an embodiment of the present invention. 2A and 2B, a liquid crystal display 200 includes a liquid crystal display module 210, a filling member 260, a transparent bonding member 221, a dam 222, and a cover glass 230. 2A, the upper substrate 212 and the cover glass 230 of the liquid crystal display module 210 are omitted, and display elements disposed in the non-pad region NPA are omitted.

The liquid crystal display module 210 includes a lower substrate 211, an upper substrate 212, a sealant 213, a liquid crystal LC, a driving chip DI, a touch pad unit TP, a display printed circuit board 240, And a touch printed circuit board (250).

The lower substrate 211 is a substrate for supporting various components of the liquid crystal display 200, and may be a glass substrate or a plastic substrate. The lower substrate 211 has an area larger than that of the upper substrate 230 and one boundary surface of the lower substrate 211 protrudes from one surface of the upper substrate 212 corresponding thereto. As a result, a portion of the upper surface of the lower substrate 211 is exposed. A region where the lower substrate 211 is exposed is defined as a pad region PA and a region where the lower substrate 211 and the upper substrate 212 are overlapped is defined as a non-pad region NPA.

The driver chip DI, the touch pad TP and the adhesive member 260 are disposed in the pad region PA and the display device 210 constituting the pixel of the liquid crystal display device 200 is disposed in the non- (display element) and wirings for transmitting various signals to the display element are arranged. The non-pad area NPA is divided into a display area where a display element is arranged and an image is displayed, and a non-display area where wirings connected to the display element are arranged and an image is not displayed. The display device may include a thin film transistor (TFT), a pixel electrode connected to the thin film transistor, and a common electrode separated from the pixel electrode. The wirings transfer the voltage to drive the display element, and may be constituted by, for example, a gate wiring for transferring a gate voltage, a data wiring for transferring a data voltage, and a touch wiring for transferring a touch signal.

The driving chip DI is connected to the display printed circuit board 240 and receives a signal from the display printed circuit board 240 to provide a driving voltage to the display device. For convenience of explanation, the driving chip DI is not specifically shown in FIG. 2A, and the driving chip region in which the driving chip DI is disposed is indicated by a dotted line. The driving chip DI may include at least one of a data driving circuit for providing a data voltage to the display element and a gate driving circuit for providing a gate voltage to the display element. The driving chip DI may be mounted on the lower substrate 211 by a COG (Chip On Glass) method.

The touch pad unit TP is connected to the touch printed circuit board 250 and receives a touch signal from the touch wiring and transmits the touch signal to the touch printed circuit board 250. The touch pad unit TP is disposed on both sides of the pad area PA so as not to overlap with the driving chip DI and the touch printed circuit board 250 is connected to the touch wirings through the touch pad unit TP. In FIG. 2A, the touch pad unit TP is not specifically shown, and the area of the touch pad unit where the touch pad unit TP is disposed is indicated by a dotted line.

The filling member 260 is disposed on both sides of the pad region PA so as to partially overlap with the touch pad portion TP. However, the present invention is not limited thereto, and the filling member 260 may be disposed on both sides of the pad region PA so as not to overlap with the touch pad portion TP. Although the filling member 260 of a rectangular shape is shown in FIG. 2A, the filling member 260 is not limited thereto, and the filling member 260 may be formed in a polygonal shape, a circular shape, or an elliptic shape except for a square shape. The filling member 260 is formed by bonding the lower substrate 211 and the cover glass 230 in the pad area PA so that the lower substrate 211 and the cover glass 230 are bonded to each other even if the distance between the cover glass 230 and the lower substrate 211 is changed. Thereby minimizing the deformation. A detailed description of the filling member 260 will be described later.

Referring to FIG. 2B, in the non-pad region NPA, the upper substrate 212 overlaps the lower substrate 211. The upper substrate 212 may be made of glass or transparent plastic having excellent light transmittance so that the image implemented through the display element can be displayed well.

The sealant 213 bonds the upper substrate 212 and the lower substrate 211 and the liquid crystal LC is filled in the inner space formed by the upper substrate 212, the lower substrate 211 and the sealant 213 . The sealant 213 seals between the upper substrate 212 and the lower substrate 211 to protect the display element and the wires from the external environment.

The cover glass 230 covers the liquid crystal display module 210 and is made of glass having excellent rigidity or thermoformability and capable of being processed with good workability so as to protect the components of the liquid crystal display module 210 from external shocks, And the like.

The transparent adhesive member 221 bonds the cover glass 230 and the liquid crystal display module 210 between the upper substrate 212 and the cover glass 230 of the liquid crystal display module 210. The transparent bonding member 221 may be formed of a composition for an acrylate-based transparent bonding member that is cured to ultraviolet (UV). The composition for the transparent adhesive member may comprise, for example, an acrylate-based monomer, an acrylate-based oligomer and an UV-initiated initiator.

The dam 222 prevents the composition for the transparent bonding member from overflowing when the composition for the transparent bonding member for forming the transparent bonding member 221 is applied on the upper substrate 212, (221). The dam 222 is formed by applying a composition for a transparent bonding member so as to surround the rim of the upper substrate 212, and then curing, and is hardened before the transparent bonding member 221 is formed.

The filling member 260 adheres the lower substrate 211 and the cover glass 230 and buffers the impact applied to the lower substrate 211 in the pad region PA. Accordingly, the filling member 260 may also be referred to as a buffer member. As described above, in the non-pad region NPA, the lower substrate 211 overlaps the upper substrate 212, and in the non-pad region NPA, the liquid crystal display module 210 has a double substrate structure. On the other hand, in the pad region PA, the lower substrate 211 is exposed alone. 2A, in the pad area PA, the display printed circuit board 240 and the touch printed circuit board 250 are electrically connected to the driving chip DI and the touch pad part TP on the lower substrate 211, The lower substrate 211 is in contact with the lower substrate 211. The upper surface of the lower substrate 211 is exposed in the pad area PA and one surface of the lower substrate 211 protrudes from one surface of the upper substrate 230 corresponding thereto.

 As shown in FIG. 2B, the lower substrate 211 exposed in the pad area PA is thinner than the cover glass 230, so is vulnerable to an external impact, and is easier to cover than the cover glass 230 It can be curved. The filling member 260 has a thickness corresponding to the distance between the cover glass 230 and the lower substrate 211 so as to minimize the bending of the lower substrate 211 and keep the lower substrate 211 in a plat . That is, the thickness of the filling member 260 may vary corresponding to the distance between the cover glass 230 and the lower substrate 211 when the distance between the cover glass 230 and the lower substrate 211 changes. That is, the filling member 260 is a soft member having an elongation capable of adapting to a change in distance between the cover glass 230 and the lower substrate 211.

For example, the elongation of the filling member 260 may be at least 300%. Here, the elongation means a ratio of the modified length to the original length of a specific material when a tensile force is applied to the specific material. In this case, even if the distance between the lower substrate 211 and the cover glass 230 changes in the manufacturing process of the liquid crystal display device 200, the lower substrate 211 and the cover glass 230 230 can be continuously adhered. However, if the elongation of the filling member is less than 300%, the filling member may not be able to adapt to the change in distance between the cover glass and the lower substrate, which may occur in the manufacturing process of the liquid crystal display. That is, when the distance between the cover glass and the lower substrate changes, the thickness of the filling member does not change. In this case, as the distance between the cover glass and the lower substrate is reduced, the lower substrate can be bent toward the cover glass side. On the other hand, the upper limit value of the elongation percentage of the filling member 260 is not particularly limited. That is, even if the distance between the cover glass 230 and the lower substrate 211 changes, the filling member must be able to firmly bond the cover glass 230 and the lower substrate 211 to each other. Therefore, the elongation of the filling member 260 Is higher.

In addition, the filling member 260 has an appropriate modulus to absorb the impact applied to the lower substrate 211. That is, it is a flexible member that can restore the deformed lower substrate 211 to its original state even if the lower substrate 211 is deformed by an impact.

For example, the filling member 260 has a modulus of 9 x 10 < ⁶ > Pa or less. Where the modulus means the degree of resistance of a particular material to tensile stress or compressive stress and is defined as the ratio of strain of a particular material to stress. Modulus The modulus of the filling member 260 in this specification means the modulus at the room temperature 25. If the modulus of the filling member 260 is equal to or lower than 9 × 10 ⁶ Pa, the filling member 260 can absorb external impacts such as rubber between the cover glass 230 and the lower substrate 211. On the other hand, when the modulus of the filling member is larger than 9 x 10 < ⁶ > Pa, the filling member becomes a rigid member and can not sufficiently absorb the external impact, so that the external impact can be transmitted to the lower substrate, May occur. On the other hand, the lower limit value of the modulus of the filling member 260 is not particularly limited. That is, as the modulus of the filling member 260 is lower, the filling member 260 can absorb the external impact well and the durability of the liquid crystal display device 200 is improved. Therefore, the lower the modulus of the filling member 260, Do.

The filling member 260 is formed of a composition for a filling member. For example, the filling member 260 may be formed of an acrylate resin composition that is cured to ultraviolet (UV).

3 is a flowchart illustrating a method of manufacturing a liquid crystal display device according to an embodiment of the present invention. 4A to 4E are schematic cross-sectional views illustrating a method of manufacturing a liquid crystal display device according to an embodiment of the present invention.

3 and 4A to 4E, a method of manufacturing a liquid crystal display device according to an embodiment of the present invention includes applying a composition 461 for a filling member onto a lower substrate 211 of a liquid crystal display module 210 S301).

4A, the composition for filling member 461 may be applied to the pad region PA on which the upper surface of the lower substrate 211 is exposed. For example, the composition for filling member 461 may be applied to both side edge portions of the pad region PA.

Thereafter, the composition for filling member 461 is first cured (S302).

The composition for filling member 461 may have a relatively low viscosity before being cured so that the composition for filling member 461 may spread to an area not coated. The composition for filling member 461 may be first cured after application, so that the composition for filling member 461 is not spread to the uncoated region. The first curing means pre-curing the composition 461 for the filling member so that the composition for filling member 461 is not completely solidified. Through the first curing, the viscosity of the composition for filling member 461 is improved and the composition for filling member 461 does not spread to unintended areas.

Then, a composition for a transparent bonding member is applied along the rim of the upper substrate 212 of the liquid crystal display module 210 facing the lower substrate 211 (S303).

The composition for the transparent adhesive member may be applied to a predetermined thickness along the rim of the upper substrate 212. The thickness and width of the composition for a transparent bonding member are not particularly limited and can be applied with appropriate thickness and width so that the composition 423 for a transparent bonding member applied to the central portion of the upper substrate 212 is not overflowed.

Thereafter, the composition for a transparent bonding member on the rim of the upper substrate 212 is cured to form a dam 222 (S304).

As described above, the dam 222 prevents the composition 423 for a transparent bonding member, which is applied to the central portion of the upper substrate 212, from overflowing. Therefore, the dam 222 is formed before the composition 423 for a transparent bonding member is applied. The dam 222 is not fully cured to be adhered to the cover glass 230 in the future, and can be hardened in the same manner as the hardened composition for filling member 461 in order to increase the viscosity.

Thereafter, the composition for transparent bonding member 423 is applied (S305) so as to cover the upper surface of the upper substrate 212 to the inside of the dam 222.

The composition 423 for a transparent bonding member may be applied to cover the entire surface of the upper substrate 212, but may be applied to cover only a part of the upper surface of the upper substrate 212, as shown in FIG. 4A. Since the applied composition 423 for a transparent bonding member is still before curing, the adhesive force is small and has a very small viscosity. The composition for transparent bonding member 423 can spread on the upper surface of the upper substrate 212 but the dam 222 formed along the rim of the upper substrate 212 prevents the composition 423 for the transparent bonding member from overflowing .

Then, the cover glass 230 is arranged to cover the liquid crystal display module 210 (S306).

The cover glass 230 may be moved to the upper portion of the liquid crystal display module 210 through a vacuum adsorber for vacuum-absorbing the upper surface of the cover glass 230. The cover glass 230 can be aligned so that the edges of the cover glass 230 and the edges of the liquid crystal display module 210 are parallel.

Thereafter, the first cured composition for filling member 461 is secondarily cured to form a filling member 260 adhered to the cover glass 230 (S307).

The cover glass 230 is pressed so that the composition for the filling member is brought into contact with the lower surface of the cover glass 230, as shown in Fig. 4B. In this case, in order to maximize the contact area between the cover glass 230 and the composition for the filling member, the cover glass 230 is excessively pressed, and the distance between the lower surface of the cover glass 230 and the upper surface of the lower substrate 211 is 1 < / RTI > of the composition for the cured filling member. On the other hand, since the cover glass 230 is excessively pressed, the dam 222 can be compressed by the cover glass 230, and the thickness of the dam 222 can be reduced.

In a state in which the cover glass 230 is pressed, ultraviolet rays (UV) are applied to the composition for the filling member to secondarily cure the composition for the filling member. Based on the second cure, the composition for the filling member is cured and a filling member 260 bonded to the cover glass 230 and the lower substrate 211 is formed. The second cured filler member 260 has a modulus of less than or equal to 9 x 10 < ⁶ > Pa and has an elongation of 300% or greater.

Thereafter, the air bubble between the upper substrate 212 and the cover glass 230 is removed (S308) so that the composition 423 for a transparent bonding member is filled between the upper substrate 212 and the cover glass 230.

As shown in FIG. 4C, the process pressure is increased while the pressure applied to the cover glass 230 is released. In this case, due to a sudden pressure change, the composition 423 for a transparent bonding member can spread to cover the entire surface of the upper substrate 212. The composition 423 for a transparent bonding member may not be coated to cover the entire surface of the upper substrate 212 and the composition 423 for a transparent bonding member may cover a part of the upper surface of the upper substrate 212 . Since the transparent adhesive member is a member that continuously adheres the cover glass 230 and the liquid crystal display module 210 after the liquid crystal display device 200 is completed, the adhesive area of the transparent adhesive member needs to be maximized. Therefore, it is necessary to spread the composition 423 for the transparent bonding member so as to cover the entire surface of the upper substrate 212 before the composition 423 for the transparent bonding member is cured. When the pressure applied to the cover glass 230 is released and the process pressure suddenly rises, the composition 423 for the transparent bonding member spreads on the upper substrate 212 due to the instantaneous pressure change.

The thickness of the dam 222 that has been compressed as the pressure applied to the cover glass 230 is released can be returned to the original state due to the restoring force of the dam 222. [ In this case, as the thickness of the dam 222 increases, the cover glass 230 can rise upward, and tensile stress is generated in the filling member 260 bonded to the cover glass 230. However, as mentioned above, since the filling member 260 has a high elongation, the gap between the cover glass 230 and the lower substrate 211 can be continuously filled even if the cover glass 230 is raised upwardly The adhesion between the cover glass 230 and the lower substrate 211 can be maintained.

If the filling member has a low elongation, the filling member also rises as the cover glass rises. Since the thickness of the filling member is kept constant due to the low elongation of the filling member, the lower substrate adhered to the filling member can be locally raised and bent as much as the filling member is elevated. In this case, the alignment of the liquid crystal may be locally distorted due to the bending of the lower substrate, and light leakage may be generated in the region where the liquid crystal alignment is distorted. However, since the filling member 260 of the liquid crystal display device 200 according to an embodiment of the present invention has a high elongation of 300% or more, even if the cover glass 230 is raised due to the restoring force of the dam 222, The thickness of the cover glass 230 can be increased and the gap between the cover glass 230 and the lower substrate 211 can be kept constant. Thus, the bending of the lower substrate 211 can be minimized and the light leakage can be suppressed.

The composition for a transparent bonding member 423 can not sufficiently fill the space between the upper substrate 212 and the cover glass 230 and the air bubbles VO) may be generated. The cover glass 230 and the liquid crystal display module 210 may not be firmly adhered to each other when the composition for transparent bonding member 423 is cured while the bubbles VO are present. In addition, when the bubbles VO are present in the active area, the visibility of the liquid crystal display 200 may be lowered due to the bubbles VO. Therefore, a process for removing the bubbles VO between the composition 423 for the transparent bonding member and the cover glass 230 must be performed before the composition 423 for a transparent bonding member is cured. The process of removing the bubbles VO may be performed by exposing the liquid crystal display device 200 to a high temperature for a predetermined time.

In the process of removing the bubbles VO, the filling member 260 and the dam 222 are exposed to the high temperature environment for a certain period of time and can be expanded. In particular, much expansion may occur at the corner of the dam 222. This is caused by a relatively large amount of the composition for the transparent bonding member applied to the corner portion in the process of forming the dam 222. Specifically, the dam 222 is formed by applying a composition for a transparent bonding member along the rim of the upper substrate 212 and hardening it. However, during the application of the composition for the transparent bonding member, a large amount of the composition for the transparent bonding member may be unintentionally applied to the corner portion of the upper substrate 212. In this case, the thickness of the corner portion of the dam 222 may be formed thicker than the thickness of other portions. Further, in the high-temperature environment, as the dam 222 is expanded, the corner portion of the dam 222 can be inflated relatively more than other portions. Thus, in the process of removing the bubbles VO, the thickness of the dam 222 may be uneven.

As the thickness of the dam 222 becomes uneven, the liquid crystal display module 210 may be tilted with respect to the flat top surface of the cover glass 230, and the touch performance of the liquid crystal display device 200 may be deteriorated. Especially, recently, 3D touch sensing technology that detects not only coordinate of touch input but also touch input intensity is under research. The intensity of the touch input can be sensed by a pressure sensor, which senses the intensity of the touch input by sensing an air gap change above the pressure sensor. The pressure sensor may be disposed below the liquid crystal display module 210. For example, the pressure sensor may be disposed under the backlight unit coupled with the liquid crystal display module 210. If the thickness of the dam 222 is not uniform, the interval between the cover glass 230 and the liquid crystal display module 210 may be non-uniform, Can be inclined. In this case, the backlight unit disposed under the liquid crystal display module 210 is also tilted, so that the gap between the backlight unit and the pressure sensor can be made non-uniform. When the gap between the backlight unit and the pressure sensor becomes uneven, the air gap on the pressure sensor may also be changed, so that the pressure sensor can not accurately measure the intensity of the touch input, and the touch performance of the liquid crystal display device 200 is deteriorated .

In addition, in the process of moving the liquid crystal display device 200 to the high-temperature chamber to remove the bubbles VO, the alignment between the cover glass 230 and the liquid crystal display module 210 may be distorted. That is, the composition for transparent bonding member 423 is weak in adhesive force before curing, so that the cover glass 230 and the upper substrate 212 can not be bonded. In this case, the cover glass 230 and the upper substrate 212 are bonded by the filling member 260. However, since the modulus of the filling member 260 is low, the filling member 260 may not effectively maintain the alignment between the cover glass 230 and the lower substrate 211. That is, when the alignment between the cover glass 230 and the lower substrate 211 is broken during the movement of the liquid crystal display device 200, the restoring force of the filling member 260 is not strong enough to cause the cover glass 230 and the lower substrate 211 can not be sufficiently restored to their original state.

In order to solve the thickness non-uniformity problem of the liquid crystal display device 200 and the alignment problem between the cover glass 230 and the lower substrate 211, a method of manufacturing a liquid crystal display device according to an embodiment of the present invention, And rearranges the alignment of module 210 and cover glass 230.

That is, in the method of manufacturing a liquid crystal display device according to an embodiment of the present invention, the alignment between the cover glass 230 and the upper substrate 212 is adjusted while pressing the cover glass 230 so that the dam 222 is compressed (S309 ).

Rearranging the alignment between the cover glass 230 and the upper substrate 212 may be performed by a liquid crystal display module and a aligning device of the cover glass according to an embodiment of the present invention. The configuration of the liquid crystal display module and the aligning device of the cover glass will be described later with reference to Figs. 5A to 5F. Hereinafter, a process of rearranging the alignment between the cover glass 230 and the liquid crystal display module 210 will be described in detail.

First, as shown in Fig. 4D, a cover glass 230 and a liquid crystal display module 210 are disposed on a support unit 490. Fig. The support unit 490 is configured to vacuum adsorb the lower substrate 211 of the liquid crystal display module 210 and to move the liquid crystal display module 210 on the xy plane.

Then, a specific portion of the cover glass 230 corresponding to the corner portion of the dam 222 is pressed through the pressurizing unit 470 so that the corner portion of the dam 222 is compressed. As mentioned above, the corner portion of the dam 222 may be excessively expanded in the course of removing the air bubbles of the composition 423 for the transparent bonding member. The pressurizing unit 470 presses the corner portion of the over-inflated dam 222 to maintain the thickness of the dam 222 substantially uniform. The pressurizing unit 470 presses a specific portion of the cover glass 230 corresponding to the corner portion of the dam 222 to 40 to 200 g / F so that the thickness of the dam 222 is kept substantially uniform. If the pressing force of the pressing unit 470 is less than 40 g / F, the thickness of the corner portion of the dam 222 may be kept thicker than the thickness of the remaining portion except for the corner portion, F, the corner portion thickness of the dam 222 is thinner than the thickness of the remaining portion, which is undesirable.

Thereafter, the position of the support unit 490 can be shifted so as to align the cover glass 230 and the liquid crystal display module 210. Since the support unit 490 vacuum-absorbs the lower substrate 211 of the liquid crystal display module 210, the position of the liquid crystal display module 210 can be moved as the position of the support unit 490 is moved. The cover glass 230 and the liquid crystal display module 210 are bonded to each other through the filling member 260 having a low modulus so that the liquid crystal display module 210 is attached to the cover glass 230 through the movement of the supporting unit 490 The relative position can be changed.

Ultraviolet rays are then irradiated onto the cover glass 230 to cure a part of the composition 423 for a transparent bonding member between the cover glass 230 and the upper substrate 212. The ultraviolet rays are irradiated to the composition 423 for the transparent bonding member through the transparent cover glass 230. In this case, the composition 423 for a transparent bonding member partially hardens, and the upper substrate 212 and the cover glass 230 are bonded to each other in a partial region.

Then, the cover glass 230 and the liquid crystal display module 210 are bonded (S310) by curing the composition 423 for a transparent bonding member filled between the cover glass 230 and the upper substrate 212.

4E, the pressing unit is separated from the cover glass 230, and the cover glass 230 is irradiated with ultraviolet rays to cure the composition for the transparent bonding member. The alignment between the cover glass 230 and the liquid crystal display module 210 can be suppressed because the cover glass 230 and the upper substrate 212 are adhered to each other by curing the composition for the transparent bonding member in some areas, The thickness of the corner portion of the dam 222 can be maintained in a compressed state even if the unit is removed. Therefore, the alignment of the cover glass 230 and the liquid crystal display module 210 is maintained, and the composition for the transparent bonding member can be cured with the thickness of the dam 222 maintained substantially uniform.

The composition for a transparent bonding member is cured to form a transparent bonding member 221. [ Although the dam 222 and the transparent bonding member 221 are shown as separate members in Fig. 4E, since the dam 222 and the transparent bonding member 221 are formed of the same composition for the transparent bonding member, As the component composition is cured, the transparent bonding member 221 and the dam 222 are formed of one adhesive member.

As mentioned above, since the filling member 260 has a low modulus, the impact applied to the liquid crystal display 200 can be absorbed by the filling member 260. [ Particularly, although the thin lower substrate 211 is exposed in the pad area PA, since a low modulus filling member 260 is disposed between the cover glass 230 and the lower substrate 211, The impact can be absorbed by the filling member 260. Thus, the durability of the liquid crystal display device 200 can be improved.

In addition, since the filling member 260 has a high elongation, the bending of the lower substrate 211 can be minimized in the process of bonding the cover glass 230 and the liquid crystal display module 210. That is, even if the distance between the lower substrate 211 and the cover glass 230 changes, the filling member 260 may be changed to a thickness corresponding thereto, and the cover glass 230 and the lower substrate 211 may be continuously adhered to each other .

On the other hand, there arises a problem that the alignment of the cover glass 230 and the liquid crystal display module 210 is re-turned due to the low modulus and high elongation of the filling member 260. However, in the method of manufacturing a liquid crystal display device according to an embodiment of the present invention, the alignment of the cover glass 230 and the liquid crystal display module 210 is rearranged so that the alignment of the cover glass 230 and the liquid crystal display module 210 Can be minimized.

Further, the corners of the dam 222 may be excessively expanded during the process of removing the air bubbles of the composition 423 for a transparent bonding member, thereby causing a problem that the thickness of the dam 222 becomes uneven. However, in the method of manufacturing a liquid crystal display device according to an embodiment of the present invention, the corner portion of the dam 222 is pressed through the pressing unit 470 and the part of the composition 423 for the transparent bonding member is hardened, 222 can be uniformly maintained. Accordingly, defects that may occur in manufacturing the liquid crystal display device 200 including the pressure sensor for sensing the intensity of the touch input can be minimized.

5A to 5F are schematic perspective views illustrating a liquid crystal display module and a cover glass alignment device according to an embodiment of the present invention.

As described above, when the filling member having a low modulus and a high elongation is used, the durability of the liquid crystal display device is improved and the light leakage phenomenon caused by the bending of the lower substrate of the liquid crystal display module can be reduced. However, due to the low modulus and high elongation of the filling member, the alignment between the cover glass and the liquid crystal display module may be distorted, or the thickness between the cover glass and the liquid crystal display module may become uneven. A method of manufacturing a liquid crystal display device according to an embodiment of the present invention solves the above-described problem by using a liquid crystal display module and a cover glass alignment device. Hereinafter, the configuration of the liquid crystal display module and the aligning device of the cover glass will be described.

5A, a liquid crystal display module and a cover glass aligning device (hereinafter, referred to as an aligning device) includes a supporting unit 490, a camera unit 480, a pressing unit 470 and a curing unit 495 .

Referring to FIG. 5B, the supporting unit 490 is a unit for supporting the liquid crystal display 200 including the liquid crystal display module and the cover glass. The supporting unit 490 includes a support 493, a first moving part 491, and a second moving part 492.

The support base 493 supports the liquid crystal display module of the liquid crystal display device 200. The support 493 may include a vacuum pump connected with a plurality of holes and holes to vacuum-adsorb the liquid crystal display module.

The first moving part 491 and the second moving part 492 are connected to the supporting table 493 and are configured to move the supporting table 493 in the x-y plane. For example, the first moving part 491 moves the support 493 in the x-axis direction and the second moving part 492 moves the support 493 in the y-axis direction.

The camera unit 480 is disposed on the support unit 490 and photographs a specific point of the cover glass to inspect the alignment between the cover glass and the liquid crystal display module. The camera unit 480 includes at least one camera 481 and illumination 482. For example, the camera unit 480 includes four cameras 481 and four lights 482. In this case, the camera 481 is configured to photograph four corner portions of the liquid crystal display device 200, and the illumination 482 is configured to irradiate light to the four corner portions of the liquid crystal display device 200. [

Referring to FIG. 5C, the pressure unit 470 is disposed above the support unit 490 and is configured to press the cover glass. For example, the pressing unit 470 is configured to press a specific portion of the rim of the upper substrate of the liquid crystal display module. The pressurizing unit 470 includes a press moving portion 471, a frame 472, a protruding body 473, and a protrusion 474.

The press moving unit 471 moves the pressing unit 470 in the z-axis direction and is connected to the frame 472. [ The frame 472 is connected to the protruding body 473 and supports the protruding body 473. The frame 472 is in the form of an open center portion, and the cover glass is exposed to the open central portion of the frame. The protruding body 473 protrudes to the central portion of the frame 472 to overlap with the cover glass, and is connected to the protruding portion 474. The protrusion 474 protrudes from the bottom surface of the protrusion body 473 and overlaps with a specific portion of the cover glass to press a specific portion of the cover glass. 5D and 5E together for a more detailed description of the pressure unit 470. Figs. 5D and 5E show how the liquid crystal display 200 is pressed through the projection 474 of the pressing unit 470. Fig.

 5D and 5E, the protrusion body 473 is connected to the bottom surface of the frame 472 and extends inward of the frame 472 so that the protrusion 474 overlaps with a specific portion of the cover glass. The projection body 473 includes a body portion 473a, a ball slider 473b, a guide shaft 473c, and a spring 473d. The guide shaft 473c is a cylinder disposed in the body portion 473a and the ball slider 473b is disposed in the guide shaft 473c to press the spring 473d. The spring 473d is disposed between the ball slider 473b and the projection 474 and transmits the pressure of the ball slider 473b to the projection 474. [ The spring 473d functions as a buffer between the ball slider 473b and the protrusion 474 so that the protrusion 474 does not excessively press the cover glass 230.

The pressurizing pump 475 is connected to the frame 472 to apply the hydraulic pressure to the upper surface of the ball slider 473b. The hydraulic pressure by the pressure pump 475 is transmitted to the protrusion 474 through the ball slider 473b and the spring 473d. The pressurizing pump 475 can provide an appropriate hydraulic pressure to the ball slider 473b so that the protrusion 474 can press the cover glass 230 with a force of 40 g / F to 200 g / F. The protrusion 474 protrudes from the protrusion body 473 and presses a specific portion of the cover glass 230 with a uniform pressure. Specifically, the protrusion 474 presses the corner portion of the dam disposed along the rim of the upper substrate. The protrusion 474 has a specific thickness such that the thickness of the corner portion of the dam remains the same as the thickness of the remaining portion except for the corner portion. For example, the protrusion 474 has a thickness of 60 mu m. The protrusion 474 may be formed of a rubber material to prevent damage to the cover glass 230, but is not limited thereto.

5F, the curing unit 495 is disposed on the support unit 490 and is configured to irradiate the cover glass 230 with ultraviolet light while the pressurizing unit 470 presses the cover glass 230. [ The curing unit 495 includes a light emitting lamp (LED) for irradiating ultraviolet light and the light emitting lamp (LED) is arranged to correspond to the open center portion of the frame 472 of the pressurizing unit 470. The ultraviolet rays emitted from the light emitting lamps (LEDs) pass through the frame 472 of the pressing unit 470 and are irradiated onto the cover glass 230, and the ultraviolet rays emitted from the cover glass 230 and the liquid crystal display module 210 The composition is partially cured.

The aligning apparatus according to an embodiment of the present invention includes a liquid crystal display module 210 and a support unit 490 that supports and supports the cover glass 230 and a camera unit 480 that photographs a specific portion of the cover glass 230 And a pressing unit 470 for pressing a specific portion of the cover glass 230. The aligning apparatus can rearrange the alignment of the liquid crystal display module 210 by moving the support unit 490 in a state in which a specific portion of the cover glass 230 is pressed. Accordingly, alignment errors of the cover glass 230 and the liquid crystal display module 210, which may be caused by the low modulus of the filling member 260, can be minimized, and the productivity of the liquid crystal display device 200 can be improved have.

The alignment device according to an embodiment of the present invention further includes a protrusion 474 and a dam (not shown) configured to press the corner portion of the dam 222 disposed along the rim of the upper substrate 212 of the liquid crystal display module 210 The thickness of the dam 222 can be uniformly maintained and the liquid crystal display including the pressure sensor can be maintained in a uniform thickness by the curing unit 495 that partially cures the composition 423 for a transparent bonding member in a state in which the pressure- The reliability of the device 200 can be improved. That is, even if the thickness of the corner portion of the dam 222 is expanded and nonuniform in the process of removing the air bubbles of the composition 423 for a transparent bonding member, the protruding portion 474 of the pressurizing unit 470 can not reach the corner portion of the dam 222 The composition for transparent bonding member 423 can be partially cured by the curing unit 495 while the dam 222 is pressed. Thus, the thickness of the dam 222 can be maintained substantially uniform, and the air gap in the liquid crystal display 200 can be maintained uniformly. Accordingly, the pressure sensor built in the liquid crystal display device 200 can accurately detect the intensity of the touch input by the user.

6A to 7C together to explain the alignment accuracy of the improved liquid crystal display device 200 and the thickness uniformity of the liquid crystal display device 200 through the alignment device according to an embodiment of the present invention .

6A to 6C are schematic cross-sectional views and graphs for explaining improved alignment accuracy of a liquid crystal display device according to an embodiment of the present invention. 6A is a schematic plan view for explaining a method of measuring alignment accuracy of a liquid crystal display device, FIG. 6B is a graph showing alignment accuracy of a liquid crystal display device according to a comparative example, FIG. 6C is a graph 5 is a graph showing the alignment accuracy of the liquid crystal display device according to the embodiment.

Referring to Fig. 6A, the screen of the liquid crystal display device includes a display area DA for displaying an image and a non-display area NDA for displaying no image. Specifically, the non-display area NDA means an area between the boundary of the display area DA and the boundary of the case or cover of the liquid crystal display device from which the image is not displayed. When the alignment between the cover glass and the liquid crystal display module is changed, the edge of the cover glass and the edge of the upper substrate of the liquid crystal display module are turned, and thus the size of the non-display area NDA is changed. Therefore, the alignment accuracy between the cover glass and the liquid crystal display module can be calculated by measuring the width of the non-display area NDA. In this specification, the width of the non-display area (NDA) was measured at two points on each of upper, lower, right and left sides of the liquid crystal display device. That is, two points y1 and y2 of the upper end portion of the liquid crystal display device, two points y3 and y4 of the lower end portion, two points x1 and x4 of the left portion and two points x2 and x3 of the right portion, The width of the non-display area (NDA) was measured respectively. When the alignment between the cover glass and the liquid crystal display module ideally fits, the width of the non-display area NDA is all 0.5 mm.

The liquid crystal display according to the comparative example shown in FIG. 6B is a liquid crystal display manufactured without using the alignment apparatus according to an embodiment of the present invention, and the liquid crystal display according to an embodiment of the present invention shown in FIG. The apparatus is a liquid crystal display manufactured using an aligning apparatus according to an embodiment of the present invention. The liquid crystal display device according to the comparative example and the liquid crystal display device according to the embodiment of the present invention all have the same configuration. Specifically, the liquid crystal display device according to the comparative example and the liquid crystal display device according to an embodiment of the present invention each include a filling member having a low modulus of 7.3 x 10 < ⁴ > Pa, and a dam formed by the same material and the same process, Member. The graphs shown in Figs. 6B and 6C were obtained by measuring 32 liquid crystal display samples, respectively. In the graphs shown in FIGS. 6B and 6C, a square box means a deviation of the measured values of 32 samples, and a dotted portion means an average of the measured values for 32 samples.

Referring to FIG. 6B, it can be seen that the width of the non-display area NDA is changed as a result of not using the alignment device according to an embodiment of the present invention. That is, it can be seen that the width of the non-display area NDA deviates by 0.2 mm or more from the ideal width (0.5 mm) at the points x3 and x4.

Referring to FIG. 6C, it can be seen that the width of the non-display area NDA is constantly maintained as a result of using the alignment device according to an embodiment of the present invention. That is, it can be seen that the width of the non-display area NDA is close to 0.5 mm at all points of the liquid crystal display device.

That is, since the alignment between the cover glass and the liquid crystal display module is rearranged through the alignment device according to the embodiment of the present invention, the non-display area NDA of the liquid crystal display device can have a uniform width, The defective rate of the liquid crystal display device can be significantly reduced.

7A to 7C are schematic cross-sectional views and graphs for explaining thickness uniformity between a cover glass and a liquid crystal display module improved in a liquid crystal display according to an embodiment of the present invention. 7A is a schematic plan view for explaining a method of measuring the thickness uniformity between the cover glass and the liquid crystal display module, FIG. 7B is a graph showing the thickness uniformity between the cover glass and the liquid crystal display module of the liquid crystal display according to the comparative example And FIG. 6C is a graph showing the thickness uniformity between a cover glass and a liquid crystal display module of a liquid crystal display according to an embodiment of the present invention.

Referring to Fig. 7A, the thickness uniformity between the cover glass of the liquid crystal display and the liquid crystal display module can be calculated by measuring the thickness between the cover glass and the liquid crystal display module at arbitrarily selected points. A total of 25 points are shown in Fig. 7A. The thickness between the cover glass of the ideal liquid crystal display device and the liquid crystal display module is 150 μm at all points.

The liquid crystal display according to the comparative example shown in FIG. 7B is a liquid crystal display manufactured without using the aligning apparatus according to an embodiment of the present invention. In the liquid crystal display according to an embodiment of the present invention shown in FIG. The apparatus is a liquid crystal display manufactured using an aligning apparatus according to an embodiment of the present invention. The liquid crystal display device according to the comparative example and the liquid crystal display device according to the embodiment of the present invention all have the same configuration. Specifically, the liquid crystal display device according to the comparative example and the liquid crystal display device according to an embodiment of the present invention each include a filling member having a low modulus of 7.3 x 10 < ⁴ > Pa, and a dam formed by the same material and the same process, Member. The graphs shown in Figs. 7B and 7C were obtained by measuring 32 liquid crystal display samples, respectively. In the graphs shown in FIGS. 7B and 7C, a square box means a deviation of the measured values of 32 samples, and a dotted portion means an average of the measured values for 32 samples.

Referring to FIG. 7B, since the liquid crystal display device according to the comparative example is manufactured without using the alignment device according to an embodiment of the present invention, the thickness between the cover glass and the liquid crystal display module is nonuniform. Specifically, it can be seen that the thickness between the cover glass and the liquid crystal display module at the point A18 is 23 μm or more larger than the ideal thickness (150 μm). That is, since the thickness of the dam disposed along the rim of the upper substrate is not uniform, the thickness between the cover glass and the liquid crystal display module becomes uneven.

Referring to FIG. 7C, since the liquid crystal display according to the embodiment of the present invention is manufactured using the aligning apparatus according to an embodiment of the present invention, it can be seen that the thickness between the cover glass and the liquid crystal display module becomes uniform have. Specifically, it can be seen that the thickness between the cover glass and the liquid crystal display module of the liquid crystal display device according to an embodiment of the present invention is within 150 μm ± 23 μm at all points.

As a result, the liquid crystal display device according to an embodiment of the present invention includes a filling member having a low modulus and a high elongation, so that refraction of the lower substrate, which may occur in the manufacturing process, can be minimized. Thus, the light leakage due to the refraction of the lower substrate can be minimized, and the number of liquid crystal display devices which are judged to be defective due to light leakage can be reduced. Thus, the productivity of the liquid crystal display device can be improved.

In addition, since the filling member with low modulus can effectively absorb the impact applied to the liquid crystal display device, there is an advantage that the durability of the liquid crystal display device can be improved.

On the other hand, there may arise a problem that the alignment between the cover glass of the liquid crystal display device and the liquid crystal display module is interrupted due to the low modulus and high elongation of the filling member. However, since the liquid crystal display device according to an embodiment of the present invention is manufactured using the alignment device according to an embodiment of the present invention, the alignment between the cover glass and the liquid crystal display module can be rearranged, .

In addition, in the step of removing air bubbles in the composition for a transparent bonding member, the dam may be unevenly inflated to cause a problem that the thickness between the cover glass and the liquid crystal display module becomes uneven. Particularly, the liquid crystal display device including the pressure sensor for detecting the intensity of the touch input of the user may not accurately detect the intensity of the touch input when the thickness between the cover glass and the liquid crystal display module is not uniform. However, since the liquid crystal display device according to an embodiment of the present invention is manufactured using the alignment device according to an embodiment of the present invention, the thickness of the dam can be uniformly corrected, and the thickness between the cover glass and the liquid crystal display module Can be maintained uniformly.

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. 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 following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

100, 200: liquid crystal display
110, 210: liquid crystal display module
111 and 211:
112, 212: upper substrate
113, 213: sealant
121, 221: transparent bonding member
122, 222: dam
130, 230: cover glass
140, 240: Display printed circuit board
150, 250: touch printed circuit board
160, 260: filling member
423: Composition for transparent bonding member
461: Composition for filling member
470: pressure unit
471:
472: Frame
473: protruding body
473a:
473b: ball slider
473c: guide shaft
473d: spring
474:
475: Pressure pump
480: Camera unit
481: Camera
482: Lighting
490: Supporting unit
491:
492:
493: Support
495: Curing unit
LC: liquid crystal
PA: pad area
NPA: non pad area
DA: Display area
NDA: Non-display area
TP: pad portion
DI: Driving chip

Claims (12)

A movable support unit for supporting the liquid crystal display module;
A camera unit for photographing the cover glass to inspect an alignment of the cover glass adhered to the filling member of the liquid crystal display module; And
And a pressing unit configured to press the cover glass and press a specific portion of the rim of the upper substrate of the liquid crystal display module. The method according to claim 1,
Wherein the pressing unit includes a protrusion configured to press a corner portion of a dam disposed along the rim of the upper substrate. 3. The method of claim 2,
Wherein the projecting portion has a specific thickness such that the thickness of the corner portion of the dam is equal to the thickness of the remaining portion except for the corner portion. The method of claim 3,
Wherein the pressing unit includes a pressing moving part configured to move the projection up and down and a spring for supporting the projection. The method according to claim 1,
Wherein the pressing unit presses the cover glass at 40 to 200 g / F. The method according to claim 1,
Further comprising a curing unit configured to irradiate the cover glass with ultra violet (UV) while the pressing unit presses the cover glass. The method according to claim 1,
Wherein the support unit comprises a support configured to vacuum-adsorb and support the liquid crystal display module, and a moving unit configured to move the support on an xy plane. Applying a composition for a filling member onto a lower substrate of a liquid crystal display module;
First curing the composition for the filling member;
Applying a composition for a transparent bonding member along an edge of an upper substrate of the liquid crystal display module facing the lower substrate;
Curing the composition for a transparent bonding member on the rim of the upper substrate to form a dam;
Applying a composition for the transparent bonding member to cover the upper surface of the upper substrate to the inside of the dam;
Disposing a cover glass to cover the liquid crystal display module;
Curing the first cured composition for the filling member to form a filling member adhered to the cover glass;
Removing air bubbles between the upper substrate and the cover glass such that the transparent adhesive composition fills both the upper substrate and the cover glass;
Aligning an alignment between the cover glass and the liquid crystal display module while pressing the cover glass to compress the dam; And
And bonding the cover glass and the liquid crystal display module by curing the composition for the transparent bonding member filled between the cover glass and the upper substrate. 9. The method of claim 8,
The step of aligning the cover glass and the liquid crystal display module while pressing the cover glass to compress the dam may include:
Disposing the cover glass and the liquid crystal display module on a supporting unit;
Pressing a specific portion of the cover glass corresponding to the corner portion of the dam with the pressing unit so that the corner portion of the dam is compressed;
Moving the position of the support so as to align the cover glass with the liquid crystal display module; And
And irradiating ultraviolet rays onto the cover glass to cure a part of the composition for the transparent bonding member between the cover glass and the upper substrate. 10. The method of claim 9,
Pressing the specific portion of the cover glass corresponding to the corner portion of the dam with the pressing unit such that the corner portion of the dam is compressed,
And pressing the specific portion of the cover glass to 40 to 200 g / F. 9. The method of claim 8,
The step of second curing the first cured composition for the filling member to form the filling member adhered to the cover glass,
And curing the filling member to have a modulus of 9 x 10 < ⁶ > Pa or less. 9. The method of claim 8,
The step of second curing the first cured composition for the filling member to form the filling member adhered to the cover glass,
And curing the filling member to have an elongation of 300% or more. ≪ Desc / Clms Page number 20 >

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