KR101684861B1 - Method of manufacturing display module - Google Patents

Abstract

According to an embodiment of the present invention, provided is a method for manufacturing a display module with a simple structure and a simple process, capable of reducing a non-display region. Herein, the method for manufacturing a display module includes the steps of: preparing a dam to surround the outer side of a backlight unit to be separated with a predetermined interval; bonding the backlight unit to a display panel by filing the inner side of the dam with resins and hardening the dam; and removing the dam, as a method for manufacturing a display module by bonding the backlight unit to the display panel.

Description

[0001] METHOD OF MANUFACTURING DISPLAY MODULE [0002]

The present invention relates to a method of manufacturing a display module, and more particularly, to a method of manufacturing a display module that is simple in structure, simple in process, and can reduce a non-display area.

In recent years, the display field has rapidly developed in line with the information age, and as a flat panel display device (FPD: Flat Panel Display Device) having advantages such as thinning, light weight and low power consumption, A plasma display panel (PDP), an electroluminescence display device (ELD), and a field emission display device (FED). Among these, liquid crystal display devices are excellent in moving picture display and are most actively used in the fields of notebooks, monitors, TVs, and portable terminals due to their high contrast ratios.

A liquid crystal display device has a liquid crystal panel in which a liquid crystal layer is sandwiched between two adjacent substrates through an intervening liquid crystal layer as an essential component and changes the arrangement direction of the liquid crystal molecules in 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 separate light source is required to display the difference in transmittance as an image. To this end, a back light unit (back light unit) do.

1 is a cross-sectional view showing a conventional liquid crystal display device.

1, a conventional liquid crystal display device includes a display panel 10, a backlight unit 11, and a mold frame 12. The mold frame 12 covers the periphery of the display panel 10 and the backlight unit 11. A light shielding portion 13 is provided between the upper surface of the mold frame 12 and the edge of the display panel 10 and the backlight unit 11 to block the spread of light emitted to the side surface of the backlight unit 11. [ A reflective layer 14 is provided on the lower surface of the backlight unit 11 and the reflective layer 14 is fixed to the mold frame 12 by the adhering portion 15. [ The conventional liquid crystal display device has a structure in which the front case 16 provided on the upper side of the display panel 10 and the rear case 17 covering the back surface of the backlight unit 11 are coupled to the front and rear sides respectively, As shown in Fig.

In recent years, such a liquid crystal display device has been widely used in portable computers, desktop computer monitors, wall-mounted televisions, and portable electronic devices such as smart phones, and it has a large display area, And volumetric studies have been actively pursued.

However, in spite of efforts to manufacture a liquid crystal display device of a light weight and a thin thickness, there are too many constituent elements of the liquid crystal display device, and the thinness and light weight of the liquid crystal display device are hindered.

In addition, the number of components constituting the liquid crystal display device is so large that the process of modularizing them is also complicated and requires a long process time.

Particularly, in recent years, liquid crystal displays are required to be lightweight and thin, to have a wide display area, and to be as small as possible in a non-display area (bezel area) other than the display area.

Patent Registration No. 1378344 (issued on March 27, 2014)

SUMMARY OF THE INVENTION The present invention provides a method of manufacturing a display module that is simple in structure, simple in process, and capable of reducing a non-display area.

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 method of manufacturing a display module for manufacturing a display module by bonding a display panel and a backlight unit, the method comprising the steps of: a) Providing a dam to enclose the dam; b) bonding the display panel and the backlight unit by filling and curing resin inside the dam; And c) removing the dam.

In the embodiment of the present invention, in the step a), the dam may include a tight contact portion which is in close contact with an outer surface of the display panel, and a fence portion which is connected to the tight contact portion and is provided to surround the outer surface of the backlight unit .

According to an embodiment of the present invention, a sealing portion may be further formed on the inner circumferential surface of the close contact portion to seal the inside of the fence portion so that the resin is prevented from flowing between the close contact portion and the display panel.

In the embodiment of the present invention, the step portion is formed in the inner peripheral surface of the tight contact portion, and the sealing portion is provided in the step portion, and the inner peripheral surface of the sealing portion and the inner peripheral surface of the fence portion can have the same surface height.

In an embodiment of the present invention, the dam may further have an extension portion connected to the tightening portion and covering at least a part of the exit surface of the display panel.

In the embodiment of the present invention, in the step a), the dam may include a fence portion surrounding the outer surface of the backlight unit, and the fence portion may be provided on an upper surface of the incident surface of the display panel.

In the embodiment of the present invention, a sealing portion may be further provided between the fence portion and the incident surface of the display panel so as to prevent the resin, which is filled inside, from leaking.

In the exemplary embodiment of the present invention, the fence portion may be formed so as to become thicker from one end face of the backlight unit closely contacting the display panel toward the other end face direction, and the resin to be hardened may have a cross- The thickness can be reduced.

In an embodiment of the present invention, after the step c), the method may further include a step of laser cutting for outer surface processing of the cured resin.

In the embodiment of the present invention, the resin may be provided so as to cover the entire outer surface of the backlight unit to prevent light leakage from the backlight unit.

In an embodiment of the present invention, a cover portion covering the outer side surface of the backlight unit is further provided, and in the step a), the dam may be arranged to surround the outer side surface of the cover portion with a predetermined gap have.

In the embodiment of the present invention, in the step b), the resin may bond the cover part and the display panel combined with the backlight unit.

According to the embodiment of the present invention, a dam is provided outside the display module, resin is injected into the inside of the dam, and the resin is cured to bond the display panel and the backlight unit, so that the modularization process can be simplified. Further, since the resin can be hardened at almost the same time as being filled in the space between the adhered portion and the backlight unit, the bonding process can proceed quickly.

In addition, according to the embodiment of the present invention, since the conventional mold frame and various configurations to be combined with the mold frame can be omitted, the display module can be made thinner and lighter, the process of modularization can be simplified, and the process time can be reduced have.

In addition, according to the embodiment of the present invention, since the structure of the conventional mold frame is omitted, the area of the upper surface of the front case can be reduced, and the overall non-display area can be reduced.

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 is a cross-sectional view showing a conventional liquid crystal display device.
2 is a flowchart illustrating a method of manufacturing a display module according to a first embodiment of the present invention.
3 is a cross-sectional view illustrating a display module manufactured by the manufacturing method of the display module according to the first embodiment of the present invention.
4 is a process diagram showing a manufacturing method of a display module according to the first embodiment of the present invention.
5 to 8 are views illustrating an example of the shape of a dam in the manufacturing process of the display module according to the first embodiment of the present invention.
9 is a view illustrating an example of a display module manufactured by the method of manufacturing the display module according to the first embodiment of the present invention and a conventional display module.
10 is an exemplary view showing an example of the shape of a dam in the manufacturing process of the display module according to the second 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.

FIG. 2 is a cross-sectional view illustrating a display module manufactured by the manufacturing method of the display module according to the first embodiment of the present invention, FIG. 3 is a flowchart illustrating a method of manufacturing the display module according to the first embodiment of the present invention And FIG. 4 is a process diagram illustrating a method of manufacturing the display module according to the first embodiment of the present invention.

As shown in FIGS. 2 to 4, the manufacturing method of the display module according to the present embodiment includes the steps of providing the dam 300 to surround the outer surface of the backlight unit 220 at a predetermined interval ).

The manufacturing method of the display module according to the present embodiment can be performed in a state where the display module 200 is turned up, that is, the display panel 210 is positioned on the lower side and the backlight unit 220 is positioned on the upper side.

Referring to FIG. 3, the display panel 210 may include a first substrate 211, a second substrate 212, and a liquid crystal layer (not shown). The first substrate 211 may be a color filter layer functioning to display images of various colors by regularly arranging resin films containing RGB (red, blue and green) pigments on a glass substrate. The second substrate 212 may be a thin film transistor substrate having a transistor thin film formed on a glass substrate and serving to transmit and control an electrical signal. The liquid crystal layer may be disposed between the first substrate 211 and the second substrate 212. The liquid crystal of the liquid crystal layer is an organic molecule having fluidity in an intermediate state between a solid and a liquid, and may have an elongated shape, and the refractive index may vary depending on the direction of light transmission. The arrangement of molecules of the liquid crystal layer can be changed according to the applied voltage, and the transmission of light can be controlled.

The display panel 210 may have a first polarizing plate 213 and a second polarizing plate 214. The first polarizing plate 213 may be provided on the lower surface of the second substrate 212 and the second polarizing plate 214 may be provided on the upper surface of the first substrate 211. The first polarizing plate 213 and the second polarizing plate 214 can transmit only light in a specific direction and can adjust the alignment state of the liquid crystal in the liquid crystal layer. The structure of the display panel 210 described above is only an example, and the display panel 210 applied to the method of manufacturing the display panel according to the present embodiment is not necessarily limited to this structure.

The backlight unit 220 may be disposed below the display panel 210 and the backlight unit 220 may illuminate the display panel 210 with light. The backlight unit 220 may have a light guide plate 221, a diffusion sheet 222, a prism sheet 223, a protective sheet 224 and a reflective sheet 225. A light source (not shown) may be disposed on a side surface of the light guide plate 221. The light source may be a light emitting diode (LED) lamp or a cold cathode lamp (CCFL) lamp. The light guide plate 221 may be an optical lens that changes the path of the light emitted from the light source and directs the light toward the diffusion sheet 222. The light guide plate 221 may be made of PMMA, which is a synthetic resin having high transparency. In order to change the path of light, a light guiding pattern may be formed on one side or both sides of the light guiding plate, and the shape of the light guiding pattern may be variously formed.

The reflective sheet 225 may have an area that substantially coincides with the light guide plate 221 and may be disposed below the light guide plate 221. The light passing through the light guide plate 221 can be leaked to the lower portion and the light leaking at this time can be reflected on the surface of the reflection sheet 225 and then incident on the light guide plate 221 and then guided toward the reflection sheet 225 . The diffusion sheet 222 is disposed on the light guide plate 221 and can diffuse the light guided by the light guide plate 221 to uniformly reach the entire surface of the display panel 210. A pattern may be formed on the surface to efficiently diffuse the light. The prism sheet 223 can be disposed on the diffusion sheet 222 and can function to enhance the brightness by condensing the light uniformly diffused by the diffusion sheet 222 to some extent. The protective sheet 224 may be disposed on the prism sheet 223 and may protect the surface of the prism sheet 223 from scratches or the like. The configuration of the backlight unit 220 described above is just an example, and the backlight unit 220 applied to the method of manufacturing the display panel according to the present embodiment is not necessarily limited to such a configuration.

The display panel 210 and the backlight unit 220 may be joined by the resin 230. The resin 230 may be provided on the outer surface of the backlight unit 220 and on one surface of the display panel 210.

Referring to FIG. 4 (a), the dam 300 may have a contact portion 310 and a fence portion 320. The adhered portion 310 may be in close contact with the outer surface of the display panel 210.

The fence unit 320 may be connected to the contact unit 310 and may surround the outer surface of the backlight unit 220. The fence portion 320 may be integrally formed with the contact portion 310. The fence unit 320 may be provided to surround the outer surface of the backlight unit 220 and may be spaced apart from the outer surface of the backlight unit 220 by a predetermined distance.

A sealing portion 330 may be further formed on the inner circumferential surface of the tight fitting portion 310 to improve adhesion between the tight fitting portion 310 and the outer surface of the display panel 210. The sealing part 330 may be provided in various forms, for example, in the form of a tape, attached to the tightly connecting part 310, coated in a liquid state, or the like. The sealing part 330 may be applied to the sealing part 310 and the display panel 210 without being limited to a specific type,

The manufacturing method of the display module may include a step S120 of bonding the display panel 210 and the backlight unit 220 by filling the resin 230 inside the dam 300 and curing the resin 230.

As shown in FIGS. 4 (b) and 4 (c), the resin 230 may be filled in the space between the tight contact portion 310 and the backlight unit 220. The resin 230 may be a UV resin, but is not limited thereto.

The sealing portion 330 may be hermetic so that the filled resin 230 is not introduced into the space between the sealing portion 310 and the display panel 210 and may be filled in the space between the sealing portion 310 and the backlight unit 220 The resin 230 can be cured. For this purpose, a UV lamp can be used. The resin 230 may be cured to bond the backlight unit 220 and the display panel 210 together.

The resin 230 can be hardened at almost the same time as it is filled in the space between the tight contact portion 310 and the backlight unit 220 and accordingly the bonding process can proceed rapidly.

In FIG. 4, the thickness of the sealing portion 330 is shown to be thick, but this is for convenience of explanation, and the thickness of the sealing portion 330 may be made thin. That is, when the space between the tight contact portion 310 and the backlight unit 220 is formed to be sufficiently narrow, the resin 230 may have a thickness of a level applied to the outer circumferential surface of the backlight unit 220.

5 to 8 are views showing an example of the shape of a dam in the manufacturing process of the display module according to the first embodiment of the present invention.

Referring to FIG. 5, the stepped portion 311 may be formed on the inner circumferential surface of the coherent portion 310a. The sealing portion 330 may be provided on the stepped portion 311. The inner peripheral surface of the sealing portion 330 and the inner peripheral surface of the fence portion 320 may have the same surface height.

The outer circumferential surface of the hardened resin 230 may not deviate from the outer circumferential surface of the display module 200 even if the sealing portion 330 is provided between the tightly connecting portion 310a and the outer circumferential surface of the display module 200 .

Referring to FIG. 6, the fence portion 320a may be formed to have a greater thickness in one direction. Specifically, the fence portion 320a may be formed such that the fence portion 320a becomes thicker from the one end face 221 of the backlight unit 220, which is in close contact with the display panel 210, toward the other end face 222.

The resin 230 to be cured can be formed so that the thickness of the cured resin 230 decreases from the one end face 221 of the backlight unit 220 toward the other end face 222 and the amount of the resin 230 used can be reduced have.

Referring to Fig. 7, the dam 300a may further have an extension 340. Fig. The extended portion 340 may be connected to the contact portion 310 and may cover at least a part of the emitting surface 211 of the display panel 210. The dam 300a can be more firmly fixed to the display module 200 if the extension 340 is formed to cover at least a part of the exit surface 211 of the display panel 210. [

Referring to FIG. 8, a cover unit 240 may be further provided to cover the outer surface of the backlight unit 220. In this case, the dam 300 may be provided so as to surround the outer surface of the cover portion 240 with a predetermined gap. That is, the adhered portion 310 can form a space to be filled with the resin 230 between the adhered portion 310 and the cover portion 240. The resin 230 can be cured to bond the cover portion 240 and the display panel 210 together.

Meanwhile, the resin 230 may be provided to cover the entire outer surface of the backlight unit 220. For this, the fence unit 320 may be formed to have a height equal to or higher than the height of the backlight unit 220. In addition, the resin 230 can block light, thereby preventing light leakage through the outer circumferential surface of the backlight unit 220.

The manufacturing method of the display module may include a step S130 of removing the dam 300 (see FIG. 4 (d)). The display module 200 including the backlight unit 220 and the display panel 210 bonded together by the resin 230 can be obtained through step S130.

In addition, the manufacturing method of the display module may further include a step (S140) of cutting with a laser for outer surface processing of the hardened resin. Step S140 may proceed if the surface quality of the cured resin 230 is poor. That is, when the surface quality of the cured resin 230 is good, the step of processing the outer surface of the cured resin using a laser may be omitted.

9 is a view illustrating an example of a display module manufactured by the method of manufacturing the display module according to the first embodiment of the present invention and a conventional display module.

9, according to the present embodiment, since the conventional mold frame 12 and other structures (the light-shielding portion 13, the bonding portion 15) combined with the mold frame 12 can be omitted, The display module can be made thinner and lighter, the process of modularization can be simplified, and the process time can be reduced. In addition, since the structure of the conventional mold frame 12 and the like is omitted, the area of the upper surface of the front case 410 can be reduced. Therefore, a narrow non-display area A2 can be formed in comparison with the non-display area A1 formed on the outside of the display panel 210 in the related art.

As described above, according to the present invention, when the same display panel is used, the size of the display module can be made smaller than the conventional one, so that the size of the device on which the display module is mounted can be reduced. If a device of the same size is used as a reference, a wider display screen can be realized than in the past.

10 is an exemplary view showing an example of the shape of a dam in the manufacturing process of the display module according to the second embodiment of the present invention.

10, the fence portion 520 of the dam 500 may be provided on the upper surface of the incident surface 212 of the display panel 210 so as to surround the outer surface of the backlight unit 220 . That is, in the present embodiment, the above-described structure of the tightly coupled portion can be omitted.

A sealing portion 530 may be further provided between the fence portion 520 and the incident surface 212 of the display panel 210 so as to prevent the resin 230 from being leaked inside. 6, the thickness of the fence unit 520 is increased from the one end face 221 of the backlight unit 220 in close contact with the display panel 210 toward the other end face 222 Can be formed to be thick.

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.

200: Display module
210: display panel
220: Backlight unit
230: Resin
240:
300, 300a, 500: dam
310, and 310a:
320, 320a, 520:
330, 330a, 530:
340: Extension

Claims (12)

A manufacturing method of a display module for manufacturing a display module by bonding a display panel and a backlight unit,
a) providing a dam to surround the outer surface of the backlight unit at a predetermined distance apart;
b) bonding the display panel and the backlight unit by filling and curing resin inside the dam; And
c) removing said dam,
In the step a), the dam has a tight contact portion which is closely attached to the outer surface of the display panel, and a fence portion which is connected to the close contact portion and is arranged to surround the outer surface of the backlight unit at a predetermined distance. ,
In the step b), the resin is filled in the space between the fence portion and the backlight unit, and the resin to be cured is provided on the outer surface of the backlight unit and on the incident surface of the display panel, Wherein the outer peripheral surface of the display module is formed so as not to deviate from the outer peripheral surface of the display module so that the backlight unit and the display panel are bonded together. delete The method according to claim 1,
Wherein a sealing portion is provided on an inner circumferential surface of the close contact portion to seal the inside of the fence portion so that the resin is prevented from flowing between the close contact portion and the display panel. The method of claim 3,
Wherein a stepped portion is formed on an inner circumferential surface of the tightly coupled portion and the sealing portion is provided on the stepped portion, wherein an inner circumferential surface of the sealing portion and an inner circumferential surface of the fence portion have the same surface height. The method of claim 3,
Wherein the dam further comprises an extension part connected to the tight contact part and covering at least a part of an emission surface of the display panel. delete delete The method according to claim 1,
The fence portion
And the thickness of the cured resin is set to be thinner from one end face of the backlight unit toward the other end face direction, Of the display module. The method according to claim 1,
Further comprising the step of cutting with a laser after the step c) for outer surface processing of the cured resin. The method according to claim 1,
Wherein the resin covers the entire outer surface of the backlight unit to prevent light leakage from the backlight unit. The method according to claim 1,
Wherein the cover is further provided with a cover covering an outer surface of the backlight unit, and in the step a), the dam is provided to surround the outer surface of the cover part with a predetermined interval. . 12. The method of claim 11,
Wherein the resin is bonded to the cover portion coupled to the backlight unit and the display panel in the step b).

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