KR101846825B1 - Liquid crystal display having narrow bezel - Google Patents

Abstract

The present invention relates to a liquid crystal display device having a narrow bezel and, more specifically, to a liquid crystal display device having an economical narrow bezel with improved yield. The liquid crystal display device comprises: a cover glass; a display unit attached to a lower portion of the cover glass; and a backlight unit provided at a lower portion of the display unit. The backlight unit and the display unit are bonded by applying a fast-curing adhesive thereon.

Description

TECHNICAL FIELD [0001] The present invention relates to a liquid crystal display device having a low-bezel,

BACKGROUND OF THE INVENTION 1. Field of the Invention [0002] The present invention relates to a liquid crystal display device having a narrow bezel, and more particularly, to a liquid crystal display device having an improved yield and an economical narrow bezel.

Recently, the display field has been rapidly developed, and flat panel displays, liquid crystal displays, plasma display devices, and electroluminescent display devices are being replaced by existing CRTs.

Among them, the liquid crystal display device is excellent in moving picture display and has been actively used in fields such as TV and monitor due to its high contrast ratio. In such a liquid crystal display device, a liquid crystal panel in which liquid crystal layers are interposed between two adjacent substrates is an essential component, and the alignment direction of the liquid crystal molecules is changed by an electric field in the liquid crystal panel to realize a difference in transmittance.

However, since the liquid crystal panel does not have its own light emitting element, a backlight unit having a light source built in the back surface is essentially arranged to display the difference in transmittance as an image. At this time, as the liquid crystal panel and the backlight unit are attached, a non-display type bezel region is formed.

In recent years, as aesthetic elements have been emphasized and light weight has been aimed, such a bezel region is required to be formed as small as possible, and technology for minimizing the bezel area has been developed.

For example, conventionally, a liquid adhesive is applied to the entire side surfaces of the liquid crystal panel and the backlight unit, the liquid adhesive is cured, and then the side is laser cut to reduce the bezel area, and then the cover glass is bonded. However, since such a conventional method includes a laser cutting process, it is impossible to apply the liquid adhesive in a state where the cover glass is initially bonded to the liquid crystal panel and the backlight unit. That is, the process is complicated and the productivity is lowered.

In addition, since a liquid adhesive having a time of 24 hours or more is used for curing in the past, when the liquid adhesive is applied to the side surfaces of the liquid crystal panel and the backlight unit, the problem that the liquid adhesive penetrates into the space between the backlight unit and the liquid crystal panel Has occurred. The liquid adhesive thus permeated may deteriorate the performance of the liquid crystal display device and cause a failure. Accordingly, in order to prevent the liquid adhesive from penetrating into the liquid crystal display device, there has been a problem in pressing the upper and lower portions of the liquid crystal panel and the backlight unit during the time when the liquid adhesive is cured.

In addition, when the liquid crystal panel and the backlight unit are combined using the conventional liquid adhesive, the entire liquid crystal panel and the backlight unit must be discarded when the liquid crystal panel and the backlight unit are bonded incorrectly, which lowers the yield and is not economical.

Korean Registered Patent No. 1541352 (July 27, 2015)

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device having a narrow bezel with improved yield and economical efficiency.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are not intended to limit the invention to the precise form disclosed. There will be.

According to an aspect of the present invention, there is provided a cover glass comprising: a cover glass; A display unit attached to a lower portion of the cover glass; And a backlight unit provided at a lower portion of the display unit, wherein the backlight unit and the display unit are bonded by applying a rapid curable adhesive material.

In an embodiment of the present invention, the display unit may include: a first polarizer attached to a lower portion of the cover glass; A color filter attached to a lower portion of the first polarizer; A thin film transistor attached to a lower portion of the color filter; And a second polarizer attached to a lower portion of the thin film transistor, wherein the second polarizer and the backlight unit are bonded by the quick-setting adhesive material.

In an embodiment of the present invention, the edge of the second polarizing plate is exposed to the outside of the backlight unit, and the quick-setting adhesive material is coated on the side surface of the backlight unit and the bottom surface exposed to the outside of the second polarizer plate .

In an embodiment of the present invention, the quick-setting adhesive material may further be applied to the outside of the already-applied rapid-curable adhesive material and the outer surface of the display unit.

In an embodiment of the present invention, the backlight unit has an edge exposed to the outside of the second polarizer, and the side of the second polarizer and the upper surface exposed to the outside of the backlight unit are coated with the quick- .

In an embodiment of the present invention, the quick-setting adhesive material may further be applied to the outside of the already-cured rapid-curing adhesive material, the side of the backlight unit and the outer surface of the display unit.

In an embodiment of the present invention, the quick-setting adhesive material may be UV (ultraviolet ray) resin.

In an embodiment of the present invention, a resin layer may be formed between the cover glass and the display unit, and the resin may be a liquid-type polymer adhesive (Optical Clear Resin).

In an embodiment of the present invention, a top surface of the thin film transistor may further include a focusing circuit (IC) and a flexible printed circuit board (FPC).

In an embodiment of the present invention, a sensor unit may be further provided between the cover glass and the display unit.

The effect of the present invention with the above-described structure is that the rapid curable adhesive material is used to shorten the time required for bonding the display unit and the backlight unit, thereby improving productivity.

In addition, since the rapid curable adhesive material is rapidly cured before being penetrated into the display unit and the backlight unit, it is possible to prevent the performance of the liquid crystal display device from deteriorating or failing.

Further, it is convenient because a process of pressing and pressing the display unit and the backlight unit during the rapid curing of the quick-setting adhesive material is unnecessary.

Further, in the case of the quick-setting adhesive material of the present invention, when the adhesion is wrong, the rapid curable adhesive material can be removed and removed, and then the quick-setting adhesive material can be applied to bond the display unit and the backlight unit again. do.

Further, since the resin layer uses a liquid type polymer adhesive (OCR) in place of the optical adhesive film (OCA), it is economical, and the light transmittance is improved and a sharp image quality can be realized.

Further, according to the present invention, since the display unit, the backlight unit and the cover glass are all combined, and the quick-setting adhesive material is applied to produce the liquid crystal display, the process is simplified and the productivity is improved.

Further, according to the present invention, it is possible to reduce the bezel area of the liquid crystal display device.

It should be understood that the effects of the present invention are not limited to the above effects and include all effects that can be deduced from the detailed description of the present invention or the configuration of the invention described in the claims.

1 to 3 are cross-sectional views illustrating a liquid crystal display device having a narrow bezel according to an exemplary embodiment of the present invention.
4 to 6 are cross-sectional views illustrating a liquid crystal display device having a narrow bezel according to another embodiment of the present invention.
7 is a graph showing the curing rate of the rapid-curable adhesive material of the present invention by wavelength.
8 is a flowchart of a method of manufacturing a liquid crystal display device having a narrow bezel according to an embodiment of the present invention.
9 is a flowchart of a process of preparing a display unit of a method of manufacturing a liquid crystal display device having a narrow bezel according to an embodiment of the present invention.
10 is a flowchart of a step of attaching a cover glass on a display unit of a method of manufacturing a liquid crystal display device having a narrow bezel according to an embodiment of the present invention.
11 is a flowchart of a step of bonding a backlight unit to a lower portion of a display unit in a method of manufacturing a liquid crystal display having a narrow bezel according to an embodiment of the present invention.
12 is a flowchart of a step of inspecting a liquid crystal display device having an inner bezel in a method of manufacturing a liquid crystal display device having a narrow bezel according to an embodiment of the present invention.
13 is a flowchart of a method of manufacturing a liquid crystal display device having a narrow bezel according to another embodiment of the present invention.
FIG. 14 is a flowchart of a step of preparing a display unit of a method of manufacturing a liquid crystal display device having a narrow bezel according to another embodiment of the present invention.
15 is a flowchart of a step of attaching a cover glass to an upper portion of a display unit of a method of manufacturing a liquid crystal display having a narrow bezel according to another embodiment of the present invention.
16 is a flowchart of a step of bonding a backlight unit to a lower portion of a display unit of a method of manufacturing a liquid crystal display device having a narrow bezel according to another embodiment of the present invention.
17 is a flowchart of a step of inspecting a liquid crystal display having an inner bezel in a method of manufacturing a liquid crystal display having a narrow bezel according to another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described with reference to the accompanying drawings. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" (connected, connected, coupled) with another part, it is not only the case where it is "directly connected" "Is included. Also, when an element is referred to as "comprising ", it means that it can include other elements, not excluding other elements unless specifically stated otherwise.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises" or "having" and the like refer to the presence of stated features, integers, steps, operations, elements, components, or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

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

1 to 3 are cross-sectional views illustrating a liquid crystal display device having a narrow bezel according to an exemplary embodiment of the present invention.

1 to 3, a liquid crystal display device 100 having a narrow bezel includes a cover glass 110, a display unit 120, and a backlight unit 130, and the backlight unit 130, The display unit 120 is characterized in that the quick-setting adhesive material 140 is applied and bonded.

The cover glass 110 may be formed of a transparent material or a material having good impact resistance. For example, the cover glass 110 may be made of a material such as sapphire glass. However, the material of the cover glass 110 is not limited to the sapphire glass.

A resin layer 115 may be formed between the cover glass 110 and the display unit 120. The resin of the resin layer 115 may be a liquid-type polymer adhesive (Optical Clear Resin). As such, since the resin layer 115 uses an inexpensive liquid-type polymer adhesive instead of the optical adhesive film OCA, it is economical, and the light transmittance is improved and a sharp image quality can be realized. Specifically, when the optical adhesive film is used, a very thin air layer is formed between the cover glass and the display unit, and the air layer can cause the light to be irregularly reflected. That is, it is difficult to realize a clear image quality due to the diffuse reflection of light. However, since the resin layer 115 made of the liquid-type polymer adhesive has no air layer, the light transmittance to the display unit 120 can be greatly increased without diffusing light. That is, the resin layer 115 can provide a clear image quality.

The backlight unit 130 is provided below the display unit 120 and may emit white light toward the cover glass 110.

The display unit 120 is attached to a lower portion of the cover glass 110 and includes a first polarizer 121, a color filter 122, a thin film transistor 123, and a second polarizer 124 do.

The first polarizer 121 is attached to a lower portion of the cover glass 110 and selectively transmits only specific light in a state of passing through the thin film transistor 123 and the color filter 122.

The color filter 122 is attached to a lower portion of the first polarizer 121 and the thin film transistor 123 is attached to a lower portion of the color filter 122. Specifically, the color filter 122 is formed by thin-film RGB (red, green, and blue) pixels, which are color pixels through which white light passes and a predetermined color is expressed. A common electrode made of ITO is applied to the entire surface have. When power is applied to the thin film transistor 123 and the thin film transistor 123 is turned on, the arrangement angle of the liquid crystal injected between the pixel electrode and the color filter 122 changes, The transmittance is changed so that the source can obtain pixels. Further, a scale circuit (not shown) and a flexible printed circuit board (not shown) may be further provided on one side of the upper surface of the thin film transistor 123.

The second polarizer 124 is attached to a lower portion of the thin film transistor 123 and selectively transmits only specific light among the white light emitted from the backlight unit 130. The second polarizing plate 124 and the backlight unit 130 may be bonded together by the quick-setting adhesive material 140.

The quick-setting adhesive material 140 is exposed to the outside of the side of the backlight unit 130 and the side of the second polarizer 124 It can be applied to the exposed bottom surface and cured.

As described above, the second polarizer 124 and the backlight unit 130 can be directly bonded to each other by applying the rapid-curable adhesive material 140 without performing a separate structure or laser cutting. Therefore, the liquid crystal display device 100 having the narrow bezel can be manufactured by combining both the display unit 120, the backlight unit 130, and the cover glass 120, and then applying the quick-setting adhesive material 140 The liquid crystal display device 100 having the inner bezel can be produced, so that the process is simple and economical.

In particular, when the quick-setting adhesive material 140 is coated on the side of the backlight unit 130 and exposed to the outside of the second polarizer 124 and cured, the liquid crystal display device having the inner low- The bezel area of the display device 100 can be reduced to 0.15 mm.

2, the fast curable adhesive material 140 may be applied to the outer side of the rapidly curable adhesive material 140 already coated, including the resin layer 115, and the outer side of the display unit 120 Can be further applied to the side surface. The rapid curable adhesive material 140 applied to the outer surface of the display unit 120 can further reduce the leakage of light emitted from the backlight unit 130. [

In addition, the quick-setting adhesive material 140 may be applied only to the outside of the already-cured rapid-curing adhesive material 140 and the outer surface of the display unit 120, as shown in FIG.

In particular, the rapid curable adhesive material 140 may be an ultraviolet ray (UV) resin, and when the rapid curable adhesive material 140 is irradiated with UV, rapid curing may be performed.

Sample unit result Explanation Exterior - black color viscosity At 25 ℃. cP 1,800 brookfield-DV3T, 25 [deg.] C, spindle CT-51 importance At 25 ℃ 1.08 density cup OD - 1.22 thickness 300 탆 Hardness - 60 shore D Elongation % 180 JIS K 6301 No.2 Modulus kgf / mm ² 120 JIS K 6301 No.2 Shear strength kgf / cm ² 211 Glass to Glass / 10 * 5 * 0.2mm 90 degree fill test kgf / cm ² 3.05 glass / 10 * 0.2mm Curing Condition Level mJ / cm ² 625 LED, 405 nm, 500 mW / cm ² , 200 탆

Table 1 shows the physical properties of the rapid curable adhesive material 140. The quick curable adhesive material 140 may be provided in black to prevent light leakage. Also, since the quick-setting adhesive material 140 has an elongation of 180% and a modulus of 120 kgf / mm 2, it can be applied to a curved liquid crystal display, and even if the display unit 120 is deformed, the damage is small. Since the quick-setting adhesive material 140 has a shear force of 211 kgf / cm 2 and can withstand the peeling test up to 3.05 kgf / cm, it is excellent in adhesive strength and can be prevented from falling off due to an external impact.

Viscosity Aver #One #2 # 3 25 ℃ 1,800 1,820 1,870 1,710 50 ℃ 476 476 470 481 60 ° C 321 321 319 323

Table 2 is an example of the viscosity of the quick-setting adhesive material 140. Specifically, in Table 2, the quick-setting adhesive material 140 was placed in a container, and the viscosity was maintained by keeping the temperature constant. After the level was confirmed, the viscosity was recorded by rotating the spindle until the torque value became stable. to be. As can be seen from the above Table 2, when the temperature of the quick-setting adhesive material is 25 ° C, the viscosity is 1800 cP (centi Poise). The viscosity of the rapid-curable adhesive material 140 may be set such that it does not flow when the quick-setting adhesive material 140 is applied.

7 is a graph showing the curing rate of the rapid-curable adhesive material of the present invention by wavelength.

7, it can be confirmed that the rapid curable adhesive material 140 is rapidly cured in the light amount of 365 nm and 405 nm. More specifically, the fast curable adhesive material 140 can be cured within 3 seconds when the light quantity is 365 nm and 405 nm, respectively. Therefore, since the rapid curable adhesive material 140 using the quick-curing UV resin is shortened in the time required for bonding the display unit 120 and the backlight unit 130, the productivity is improved.

In addition, since it took more than 24 hours to cure the adhesive material in the past, the adhesive material penetrated into the display unit and the backlight unit, thereby deteriorating the performance of the liquid crystal display device or causing a failure, thereby lowering the yield. Therefore, in the related art, there has been a problem in that the display unit and the backlight unit are pressed and pressed while the adhesive material is cured, so that the adhesive material is prevented from penetrating into the display unit and the backlight unit.

However, since the liquid crystal display device 100 having the narrow bezel uses the quick-curable adhesive material 140 as the fast curable UV resin, the liquid crystal display device 100 having the narrow- Curing is completed before the curable adhesive material 140 penetrates. Therefore, it is possible to prevent the performance of the liquid crystal display device 100 having the narrow bezel from deteriorating or failing due to the penetration of the quick-setting adhesive material 140. The liquid crystal display device 100 having the inner bezel may be configured such that a process of pressing and pressing the display unit 120 and the backlight unit 130 while the rapid curable adhesive material 140 is rapidly cured is unnecessary So convenient.

Further, in the related art, when it takes a long time for the adhesive material to harden and the display unit is defective, both the display unit and the backlight unit have to be removed because the adhesive material can not be removed. However, The fast curing adhesive material 140 may be reattached to the display unit 120 after the fast curing adhesive material 140 is removed and only the portion where the defect has occurred is reworked. Thus, the yield is improved.

In addition, the quick-setting adhesive material 140 may be applied using a jet valve. The jet valve is excellent in dispensing position, discharge direction, residual pressure, and discharge amount deviation by a point spraying method, and can apply the rapid curable adhesive material 140 by a predetermined amount to a desired position. However, the method of applying the adhesive material of the quick-setting adhesive material 140 is not limited to the jet valve method.

A sensor unit 150 may further be provided between the cover glass 110 and the display unit 120. The sensor unit 150 may sense the position of an object or a hand in contact with the cover glass 110.

4 to 6 are cross-sectional views illustrating a liquid crystal display device having a narrow bezel according to another embodiment of the present invention.

A liquid crystal display 200 having a narrow bezel according to another embodiment shown in FIGS. 4 to 6 includes a cover glass 210, a display unit 220, a backlight unit 230, 230 and the display unit 220 are coated with a fast curing adhesive material 240 and bonded. Here, the liquid crystal display device 200 having the narrow bezel according to another embodiment will not be described in terms of a configuration similar to that of the liquid crystal display device 100 having the narrow bezel according to an embodiment, Only the parts should be explained as follows.

The backlight unit 230 has an edge exposed to the outside of the second polarizing plate 224 and an upper surface exposed to the outside of the backlight unit 230 and the side surface of the second polarizing plate 224, (240).

As described above, the second polarizer 224 and the backlight unit 230 can be directly bonded to each other by applying the rapid curable adhesive material 240 without having to perform a separate structure or laser cutting. Accordingly, the liquid crystal display device 200 having the narrow bezel can be manufactured by combining both the display unit 220, the backlight unit 230, and the cover glass 220, and then applying the quick-setting adhesive material 240 The liquid crystal display device 200 having the inner bezel can be produced, so that the process is simple and economical.

In particular, when the quick-setting adhesive material 240 is coated on the side surface of the second polarizer 224 and the upper surface exposed to the outside of the backlight unit 230 and cured, the liquid crystal display device having the narrow bezel The bezel area of the optical fiber 200 can be reduced to 0.15 mm,

5 and 6, the quick curable adhesive material 240 may be applied to the outside of the already rapidly curable adhesive material 240, the side surface of the backlight unit 230, and the display unit 220, As shown in Fig. At this time, the quick-setting adhesive material 240 may be further applied to the side surface of the resin layer 215, as shown in FIG. The rapid curable adhesive material 240 applied to the outer surface of the display unit 220 can further reduce the leakage of light emitted from the backlight unit 230.

FIG. 8 is a flowchart illustrating a method of manufacturing a liquid crystal display device having a narrow bezel according to an exemplary embodiment of the present invention. FIG. 9 is a view illustrating a method of manufacturing a liquid crystal display device having a narrow bezel according to an exemplary embodiment of the present invention. This is a flowchart of the steps of preparing the unit. 10 is a flowchart of a step of attaching a cover glass to an upper portion of a display unit of a method of manufacturing a liquid crystal display device having a narrow bezel according to an embodiment of the present invention. And FIG. 12 is a view illustrating a process of bonding a backlight unit to a lower portion of a display unit of a method of manufacturing a liquid crystal display device having a narrow bezel according to an embodiment of the present invention. And a step of inspecting the liquid crystal display device having the low-bezel of FIG.

As shown in FIGS. 1, 2 and 8 to 12, the manufacturing method of the liquid crystal display 100 having the narrow bezel according to an embodiment of the present invention includes the steps of preparing the display unit 120 S110).

More specifically, the preparing step S110 of the display unit 120 may first include preparing a first polarizing plate 121 to be attached to the lower portion of the cover glass 110 (S111).

A step S112 of attaching a color filter 122 to the lower part of the first polarizing plate 121 after the step S111 of preparing the first polarizing plate 121 to be attached to the lower part of the cover glass 110, Can be performed.

The step S113 of attaching the thin film transistor 123 to the lower part of the color filter 122 may be performed after the step of attaching the color filter 122 to the lower part of the first polarizer 121 have.

After the step S113 of attaching the thin film transistor 123 to the lower portion of the color filter 122, the second polarizer 124 whose edge is exposed to the outside of the backlight unit 130 is inserted into the thin film transistor 123 (Step S114).

After the step S110 of preparing the display unit 120, the step S120 of attaching the cover glass 110 to the upper portion of the display unit 120 may be performed.

More specifically, the step S120 may first perform the step S121 of preparing the cover glass 110. FIG.

After the step S121 of preparing the cover glass 110, a step S122 of attaching the sensor unit 150 to the lower portion of the cover glass 110 may be performed. However, the step S122 of attaching the sensor unit 150 to the lower portion of the cover glass 110 may be performed only when it is desired to implement the touch screen panel. That is, the step of attaching the sensor unit 150 to the lower portion of the cover glass 110 (S122) may be omitted when it is desired to implement an LCD panel that does not need to recognize the contact of the human body or an object.

Next, a step S123 of forming a resin layer 115 under the cover glass 110 may be performed. More specifically, the resin layer 115 is attached to a lower portion of the cover glass 110. When the sensor unit 150 is attached to the lower surface of the cover glass, the resin layer 115 is formed on the lower surface of the sensor unit 150 . When the sensor unit 150 is not attached to the lower surface of the cover glass 110, the resin layer 115 may be formed on the lower surface of the cover glass 110.

In addition, the resin of the resin layer 115 may be a liquid-type polymer adhesive (Optical Clear Resin).

The step of attaching the display unit 120 to the resin layer 115 may be performed after the step S123 of forming the resin layer 115 below the cover glass 110.

After the step S120 of attaching the cover glass 110 to the upper portion of the display unit 120, the step S130 of bonding the backlight unit 130 to the lower portion of the display unit 120 may be performed. In the step S130 of bonding the backlight unit 130 to the lower portion of the display unit 120, the display unit 120 and the backlight unit 130 are bonded to each other by applying a rapid- . ≪ / RTI > Here, the characteristics of the rapid-curable adhesive material 140 are as described above.

The step S130 of bonding the backlight unit 130 to the lower part of the display unit 120 first attaches the quick curable adhesive material 140 to the side surface of the backlight unit 130 and the second polarizer plate 124 (S131) to the bottom surface exposed to the outside of the apparatus. In this step, the lower surface exposed to the outside of the second polarizing plate 124 is rotated to face upward, or the side surface of the backlight unit 130 is rotated to face upward, and then the fast curing adhesive material 140 Can be applied to the bottom surface exposed to the side of the backlight unit 130 and the outside of the second polarizer plate 124. [ When the fast curable adhesive material 140 is applied in such a rotated state, the quick curable adhesive material 140 can be easily applied at a predetermined position.

After the step of applying the quick-setting adhesive material 140 to the bottom surface of the backlight unit 130 and to the outside of the second polarizer plate 124, the rapid curable adhesive material 140 (S132) of rapid curing can be performed. When the rapid curable adhesive material 140 is a UV resin, the rapid curable adhesive material 140 applied at a strength of 500 mW or more may be cured by irradiating light using an LED curing machine having a wavelength of 365 nm or more. The rapidly curable adhesive material 140 that is cured under these conditions can be rapidly cured as shown in Fig. However, the conditions for curing the rapid-curable adhesive material 140 are not limited to those described in the embodiment, but may be all included in one embodiment as long as the rapid-curable adhesive material 140 can be rapidly cured.

After the rapid curing adhesive material 140 is rapidly cured (S132), the rapid curable adhesive material 140 is coated on the outer side of the rapidly curable adhesive material 140 and the outer side of the display unit 120 (S133) can be performed. The step of applying the rapid curable adhesive material 140 to the outer side of the rapidly curable adhesive material 140 and the outer side of the display unit 120 may further include the step of curing the quick curable adhesive material 140 The display unit 120 including the outside of the quick-curing adhesive material 140 coated in the side surface of the backlight unit 130 and the bottom surface exposed to the outside of the second polarizing plate 124 in step S131, It is possible to prevent the white light emitted from the backlight unit 130 from leaking by applying the quick-setting adhesive material 140 to the outer surface of the backlight unit 130. However, the step of applying the rapid curable adhesive material 140 to the outer side of the rapidly curable adhesive material 140 and the outer side of the display unit 120 is not necessarily performed, . The fast curable adhesive material 140 may be applied after rotating the display unit 120 such that the position to which the quick curable adhesive material 140 is applied faces upward, So that it can be easily applied to a predetermined position.

After the rapid curable adhesive material 140 is coated on the outer side of the rapidly curable adhesive material 140 and on the outer side of the display unit 120, (Step S134). The rapid curing adhesive material 140 is rapidly cured (S134) is substantially the same as the rapid curing adhesive material 140 (S132), and thus a detailed description thereof will be omitted. If the rapid curable adhesive material 140 is rapidly cured (S134), if the step of applying the rapid curable adhesive material 140 to the outer surface of the display unit 120 is omitted (S133) Is omitted.

When the rapid curable adhesive material 140 is applied, the position and thickness of the rapid curable adhesive material 140 may be confirmed through a vision camera (not shown). When the thickness of the rapid curable adhesive material 140 is out of the preset range, the amount of the rapid curable adhesive material 140 discharged per unit time, the moving speed of the discharging device, The thickness of the quick-setting adhesive material 140 can be controlled by adjusting any one of the ejection speeds of the hardenable adhesive material 140.

The step (S131) of applying the rapid curable adhesive material 140 to the lower surface exposed to the side of the backlight unit 130 and the outside of the second polarizing plate 124, The step 140 of inspecting the liquid crystal display 100 having the narrow bezel after the step of applying the fast curing adhesive material 140 on the outer side and the outer side of the display unit 120 . ≪ / RTI >

In step S140 of inspecting the liquid crystal display device 100 having the narrow bezel, a step S141 of inspecting the display unit 120 and the backlight unit 130 may be performed. In step S141 of inspecting the display unit 120 and the backlight unit 130, it is possible to confirm whether there is a defective part in the components of the display unit 120 and the backlight unit 130.

If any one of the display unit 120 and the backlight unit 130 is defective after the step S141 of inspecting the display unit 120 and the backlight unit 130, (S142) may be performed. That is, the step of applying the quick-curable adhesive material 140 to the bottom surface of the backlight unit 130 and the second polarizer 124 exposed to the outside or the quick-setting adhesive material 140 It is possible to remove the rapidly curable adhesive material 140 that has already been applied in the step S133 of applying the adhesive to the outer surface of the quick-setting adhesive material 140 already applied and the outer surface of the display unit 120. [

After the step of removing the quick-setting adhesive material 140 (S142) in the event that any one of the display unit 120 and the backlight unit 130 is defective, the display unit 120 and the backlight unit (S143) of replacing the defective component in the step 130 can be performed.

After the step S143 of replacing the defective component in the display unit 120 and the backlight unit 130, the quick curable adhesive material 140 may be reapplied (S144).

In addition, the step of inspecting the liquid crystal display 100 having the narrow bezel may be performed after the rapid curing adhesive material 140 is rapidly cured (S132 or S134).

Conventionally, when an adhesive material is applied, it is difficult to remove an adhesive material. Therefore, when a display unit or a backlight unit is defective in a state in which an adhesive material is applied, it is necessary to dispose of the adhesive material. However, the step S140 of inspecting the liquid crystal display device 100 having the narrow bezel thus prepared can be easily performed because of the excellent reworkability of the quick-setting adhesive material 140. Since the defective parts can be replaced and the defective parts can be reused through the step S140 of inspecting the liquid crystal display device 100 having the narrow bezel, the cost can be reduced and the yield can be improved to 95% or more . ≪ / RTI >

FIG. 13 is a flowchart of a method of manufacturing a liquid crystal display device having a narrow bezel according to another embodiment of the present invention, and FIG. 14 is a cross-sectional view illustrating a method of manufacturing a liquid crystal display device having a narrow bezel according to another embodiment of the present invention. This is a flowchart of the steps of preparing the unit. 15 is a flowchart of a step of attaching a cover glass to an upper portion of a display unit of a method of manufacturing a liquid crystal display device having a narrow bezel according to another embodiment of the present invention. And FIG. 17 is a view illustrating a process of bonding a backlight unit to a lower portion of a display unit of a method of manufacturing a liquid crystal display device having a narrow bezel according to another embodiment of the present invention. And a step of inspecting the liquid crystal display device having the low-bezel of FIG.

3, 4 and 13 to 17, the manufacturing method of the liquid crystal display device 200 having the narrow bezel according to another embodiment of the present invention includes the steps of preparing the display unit 220 S210).

Specifically, the preparing step S210 of the display unit 220 may first prepare a first polarizing plate 221 to be attached to the lower portion of the cover glass 210 (S211).

A step S212 of attaching a color filter 222 to the lower part of the first polarizing plate 221 after the step S211 of preparing the first polarizing plate 221 to be attached to the lower part of the cover glass 210, Can be performed.

The step S213 of attaching the thin film transistor 223 to the lower portion of the color filter 222 may be performed after the step S212 of attaching the color filter 222 to the lower part of the first polarizer 221 have.

The step of attaching the second polarizing plate 224 to the lower portion of the thin film transistor 223 may be performed after the step S213 of attaching the thin film transistor 223 to the lower portion of the color filter 222 have. In this step, the second polarizing plate 224 may be formed such that the edge of the backlight unit 230 is exposed to the outside of the second polarizing plate 224.

After the step S210 of preparing the display unit 220, the step S220 of attaching the cover glass 210 to the upper portion of the display unit 220 may be performed.

More specifically, the step S220 may first perform the step S221 of preparing the cover glass 210. [

After the step S221 of preparing the cover glass 210, a step S222 of attaching the sensor unit 250 to the lower portion of the cover glass 210 may be performed. However, the step S222 of attaching the sensor unit 250 to the lower part of the cover glass 210 may be performed only when it is desired to implement the touch screen panel. That is, the step of attaching the sensor unit 250 to the lower portion of the cover glass 210 (S222) may be omitted when it is desired to implement an LCD panel that does not need to recognize the contact of the human body or an object.

Next, a step (S223) of forming a resin layer 215 below the cover glass 210 may be performed. More specifically, the resin layer 215 is attached to a lower portion of the cover glass 210. When the sensor unit 250 is attached to the lower surface of the cover glass, the resin layer 215 is formed on the lower surface of the sensor unit 250 . When the sensor unit 250 is not attached to the lower surface of the cover glass 210, the resin layer 215 may be formed on the lower surface of the cover glass 210.

In addition, the resin of the resin layer 215 may be a liquid-type polymer adhesive (Optical Clear Resin).

The step of attaching the display unit 220 to the resin layer 215 may be performed after step S223 of forming the resin layer 215 below the cover glass 210.

After the step S220 of attaching the cover glass 210 to the upper portion of the display unit 220, the step S230 of joining the backlight unit 230 to the lower portion of the display unit 220 may be performed . In the step S230 of bonding the backlight unit 230 to the lower part of the display unit 220, the display unit 220 and the backlight unit 230 are coated with the rapid curable adhesive material 240 Or the like. Here, the characteristics of the quick-setting adhesive material 240 are as described above.

The step S230 of joining the backlight unit 230 to the lower part of the display unit 220 is performed by first attaching the side of the second polarizer 224 and the upper surface exposed to the outside of the backlight unit 230 The step of applying the quick-setting adhesive material 240 (S231) may be performed. At this stage, the quick-setting adhesive material 240 may be applied to the side surface of the second polarizing plate 224 after the side of the second polarizing plate 224 is turned to face upward. When the rapid curable adhesive material 240 is applied in the rotated state, the quick curable adhesive material 240 can be easily applied at a predetermined position.

After the step S231 of applying the quick-setting adhesive material 240 to the side surface of the second polarizer 224 and the upper surface exposed to the outside of the backlight unit 230, (Step S232). When the rapid curable adhesive material 240 is a UV resin, the rapid curable adhesive material 240 applied with a strength of 500 mW or more may be cured by irradiating light using an LED curing machine having a wavelength of 365 nm or longer. The rapid curable adhesive material 240 that is cured under these conditions can be rapidly cured as shown in Fig. However, the conditions for curing the rapid-curable adhesive material 240 are not limited thereto, and all the configurations for rapidly curing the quick-curable adhesive material 240 are all included.

After the rapid curing adhesive material 240 is rapidly cured (S232), the quick curing adhesive material 240 is applied to the side surface of the backlight unit 230 and the outer surface of the display unit 220 (S233). The step S233 of applying the quick-curing adhesive material 240 to the side surface of the backlight unit 230 and the outer surface of the display unit 220 may be performed while the outer surface of the display unit 220 and the backlight unit 230 May be further performed to prevent the white light emitted from the backlight unit 130 from leaking to the side of the backlight unit 130. However, the present invention is not necessarily performed and may be omitted. The display unit 220 and the backlight unit 230 are rotated so that the position to which the quick-setting adhesive material 240 is to be applied is directed upward, and then the quick-setting adhesive material 240 is applied, The curable adhesive material 240 can be easily applied to the predetermined position.

After the rapid curable adhesive material 240 is coated on the side surface of the backlight unit 230 and the outer surface of the display unit 220, the rapid curable adhesive material 240 is rapidly cured (S234). The rapid curing adhesive material 240 is rapidly cured at step S234 because it is substantially the same as the step S232 of rapidly curing the rapid curable adhesive material 240, and thus a detailed description thereof will be omitted. The step of rapidly curing the rapid curable adhesive material 240 may include applying the rapid curable adhesive material 240 to the side surface of the backlight unit 230 and the outer surface of the display unit 220 (S233) are omitted, they are omitted together.

In addition, when applying the rapid curable adhesive material 240, the position and thickness of the quick curable adhesive material 240 may be confirmed through a vision camera (not shown). When the thickness of the rapid curable adhesive material 240 is out of the predetermined range, the amount of the rapid curable adhesive material 240 discharged per unit time, the moving speed of the discharging device, The thickness of the quick-setting adhesive material 240 can be controlled by adjusting any one of the ejection speeds of the hardenable adhesive material 240.

A step S231 of applying the rapid curable adhesive material 240 to the bottom surface of the backlight unit 230 exposed to the outside of the backlight unit 230 and the second polarizer plate 224, After the step S233 of applying the fast curing adhesive material 240 on the outside and the outer surface of the display unit 220, the step 240 of inspecting the liquid crystal display 200 having the inner low- . ≪ / RTI >

In step S240 of inspecting the liquid crystal display 200 having the narrow bezel, a step S241 of inspecting the display unit 220 and the backlight unit 230 may be performed. In step S241 of inspecting the display unit 220 and the backlight unit 230, it is possible to check whether there is a defective part in the components of the display unit 220 and the backlight unit 230. [

If any one of the display unit 220 and the backlight unit 230 is defective after the step S241 of inspecting the display unit 220 and the backlight unit 230, (S242) may be performed. That is, the quick curable adhesive material 240 may be applied to the bottom surface of the backlight unit 230 and the second polarizer 224, or the quick curable adhesive material 240 may be applied The rapidly curable adhesive material 240 already applied in the step S233 of applying the adhesive to the outer surface of the quick curable adhesive material 240 already applied and the outer surface of the display unit 220 may be removed.

After the step of removing the fast curing adhesive material 240 (S242) when any one of the display unit 220 and the backlight unit 230 is defective, the display unit 220 and the backlight unit 230 (S243) of replacing the defective part with the defective part may be performed.

After the step S243 of replacing the defective parts of the display unit 220 and the backlight unit 230, the step of reapplying the quick-setting adhesive material 240 may be performed (S244).

Also, it may be arranged to perform step S240 of inspecting the liquid crystal display 200 having the narrow bezel after the rapid curing adhesive material 240 is rapidly cured (S232 or S234).

Conventionally, when an adhesive material is applied, it is difficult to remove an adhesive material. Therefore, when a display unit or a backlight unit is defective in a state in which an adhesive material is applied, it is necessary to dispose of the adhesive material. However, the step S240 of inspecting the liquid crystal display 200 having the narrow bezel thus prepared can be easily performed because of the excellent reworkability of the quick-setting adhesive material 240. In addition, it is possible to replace defective parts by inspecting the liquid crystal display device 200 having the narrow bezel (step S240) and to reuse the defective parts, so that the cost is reduced, and the yield is 95% or more . ≪ / RTI >

The method of manufacturing a liquid crystal display device having a narrow bezel as described above may further include the step of applying the quick-setting adhesive material 140 or 240 to the side surfaces of the display units 120 and 220 and the backlight units 130 and 230 There is no possibility that the quick-setting adhesive material 140 or 240 penetrates into the display units 120 and 220 and the backlight unit 130 and 230. Therefore, a process of pressing and pressing the upper and lower portions of the display units 120 and 220 and the backlight units 130 and 230 is unnecessary, so that the process can be simplified. That is, productivity is improved.

The method of manufacturing a liquid crystal display device having a low-bezel may further include a step of fixing the cover glass 110, 210, the display units 120, 220 and the backlight units 130, Since the rapid curable adhesive materials 140 and 240 are applied and cured, the productivity can be further improved.

Further, the method of manufacturing a liquid crystal display device having a low-bezel can be applied as it is because it can be used as it is by utilizing an existing manufacturing line.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims, and all changes or modifications derived from the meaning and scope of the claims and their equivalents should be construed as being included within the scope of the present invention.

100, 200: liquid crystal display device having low-bezel
110, 210: cover glass
120, 220: display unit
121, 221: first polarizing plate
122, 222: Color filter
123 and 223: thin film transistors
124, 224: second polarizer plate
130, 230: Backlight unit
140, 240: Fast-curing adhesive material
150, 250: Sensor unit

Claims (6)

Cover glass made of transparent material;
A display unit attached to a lower portion of the cover glass; And
And a backlight unit provided below the display unit for emitting white light toward the cover glass,
Characterized in that the backlight unit and the display unit are bonded with a quick-setting adhesive material applied thereto,
The display unit includes:
A first polarizer attached to a lower portion of the cover glass;
A color filter attached to a lower portion of the first polarizer;
A thin film transistor attached to a lower portion of the color filter; And
And a second polarizer attached to a lower portion of the thin film transistor and having an edge exposed to the outside of the backlight unit,
Wherein the quick-setting adhesive material is applied to a side surface of the backlight unit and a bottom surface exposed to the outside of the second polarizer plate in a state where the display unit, the backlight unit,
Wherein the quick-setting adhesive material has a viscosity of 1710 cP (centipoise) to 1870 cP at 25 캜, 470 cP to 481 cP at 50 캜, and 319 cP to 323 cP at 60 캜, wherein when the quick-setting adhesive material is applied, The light is prevented from flowing into the backlight unit,
The rapid curable adhesive material is provided with an elongation of 180% and a modulus of 120 kgf / mm ² , so that the rapid curable adhesive material can be applied to a curved liquid crystal display device, and the fast curable adhesive material Reducing damage,
The quick-setting adhesive material is provided so as to have a shear force of 211 kgf / cm ² and withstands 3.05 kgf / cm at the peel test according to the 90-degree peel test, thereby preventing the rapid-curing adhesive material from falling off due to external impact The liquid crystal display device having a low-bezel. The method according to claim 1,
Wherein the rapid curable adhesive material is further applied to an outer side of the rapidly curable adhesive material already applied and an outer side of the display unit. The method according to claim 1,
Wherein the quick-setting adhesive material is ultraviolet ray (UV) resin. The method according to claim 1,
Wherein a resin layer is formed between the cover glass and the display unit, and the resin is a liquid-type polymer adhesive (Optical Clear Resin). The method according to claim 1,
Wherein an integrated circuit (IC) and a flexible printed circuit board (FPC) are further provided on one side of the upper surface of the thin film transistor. The method according to claim 1,
And a sensor unit is further provided between the cover glass and the display unit.

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