KR20080022619A - Optical module, back light assembly having the same, and display device having the back light assembly - Google Patents

Abstract

An optical module, a backlight assembly having the same, and a display device having the backlight assembly are provided to combine first and second fixing parts at a receiving container and to fix a body at the receiving container without fixing members to reduce components, thereby enabling production cost to be reduced. An optical module(100) comprises a plate shaped body(10), fixing portions(20), and a protrusion portion(30). The body has a light incidence surface and a light exiting surface. The fixing portions are formed at sides(12) facing each other. The protrusion portion is protruded along the edge of the light exiting surface of the body to form a receiving part on the light exiting surface. The sides include first and second side surfaces(12a,12b). The fixing members include first and second fixing parts(22,24). The fixing parts are protruded from the sides. Thereby, the number of parts is reduced.

Description

OPTICAL MODULE, BACK LIGHT ASSEMBLY HAVING THE SAME, AND DISPLAY DEVICE HAVING THE BACK LIGHT ASSEMBLY}

1 is a perspective view showing an optical module according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1.

3 is a side view of the A direction of FIG.

FIG. 4 is an exploded perspective view illustrating optical sheets housed in a housing of the body illustrated in FIG. 1.

FIG. 5 is an exploded perspective view illustrating the light source unit disposed in the body illustrated in FIG. 1.

FIG. 6 is a cross-sectional view taken along the line II-II 'of FIG. 5.

7 is a perspective view of a light source module including an optical unit according to another embodiment of the present invention.

FIG. 8 is a perspective view illustrating a light blocking member disposed in the optical unit illustrated in FIG. 1.

9 is an exploded perspective view of a backlight assembly according to an embodiment of the present invention.

10 is a cross-sectional view of the assembled backlight assembly.

11 is a cross-sectional view showing the assembly of the optical sheet and the light blocking member to the assembled backlight assembly.

12 is an exploded perspective view illustrating a display device according to an exemplary embodiment of the present invention.

The present invention relates to an optical module, a backlight assembly having the same, and a display device having the same.

Recently, the development of a display device for displaying data processed by an information processing device as an image is rapidly progressing.

Representative display devices include liquid crystal display devices (LCDs), organic light emitting devices (OLEDs), and plasma display panels (PDPs).

Among them, the liquid crystal display displays an image by using liquid crystal. Liquid crystals not only have electrical properties that change the arrangement in response to an electric field, but also change the transmittance of light in response to the arrangement.

The liquid crystal display includes a liquid crystal control part including a liquid crystal and electrodes for applying an electric field to the liquid crystal, and a light providing part for providing light for displaying an image on the liquid crystal control part. ).

The light providing part includes a light source for generating light and a plurality of members for improving brightness uniformity of light generated from the light source, for example, a light guide panel (LGP), and optical sheets. And a support member for supporting the back. On the other hand, the light providing part includes a storage container for storing the light control part, the light source, the light guide plate, the optical sheets, and the support member.

However, due to the support member of the light providing part of the conventional liquid crystal display device, a number of problems such as an increase in the number of assembly parts and an increase in assembly time have occurred.

One object of the present invention is to provide an optical module capable of reducing the number of components and the assembly time of components of a liquid crystal display.

Another object of the present invention to provide a backlight assembly including the optical module.

Another object of the present invention is to provide a display device including the backlight assembly.

An optical module for realizing one object of the present invention is a plate-shaped body having a light incident surface to which light is incident and a light exit surface from which light is emitted, which is formed on an opposite side of the body connected to the light incident surface. And projections protruding along the edge of the light exit surface of the body to form a receiving portion on the government and the light exit surface.

Another embodiment of the present invention provides a backlight assembly comprising a plate-shaped body having a light incident surface to which light is incident and a light exit surface from which light is emitted, and formed on both opposite sides of the body connected to the light incident surface, respectively. An optical module comprising first and second fixing portions and protrusions protruding along the edge of the light exit surface of the body to form an accommodating portion on the light exit surface, a light source unit providing light to the light incident surface, and an optical module and light source A first sidewall having a first engagement portion engaging with the first fixing portion, a second sidewall having a second engagement portion engaging with the second fixing portion, and a bottom plate connected with the first and second sidewalls; It includes a storage container.

According to another aspect of the present invention, there is provided a display device including a plate-shaped body having a light incident surface on which light is incident and a light exit surface on which light is emitted, protruding from an opposite first side of the body connected to the light incident surface. An optical module comprising a first fixing portion, a second fixing portion protruding from a second side facing the first side, and a protrusion protruding along an edge of the light emitting surface of the body to form an accommodating portion on the light emitting surface; Optical unit, optical module, optical sheet, and light source unit, including optical sheet for storing the light contained in the payment part to improve the characteristics of the light emitted from the light exit surface, a light source for providing light to the light incident surface, and a circuit board on which the light source is mounted A first sidewall having a first coupling portion engaging with the first fixing portion, a second sidewall having a second coupling portion engaging with the second fixing portion, and a bottom plate connected with the first and second sidewalls; It includes a containing container and a display panel accommodated in the storage container and disposed on the optical module.

Hereinafter, an optical module, a backlight assembly having the same, and a display device having the same according to embodiments of the present invention will be described in detail with reference to the accompanying drawings, but the present invention is not limited to the following embodiments. Those skilled in the art may implement the present invention in various other forms without departing from the technical spirit of the present invention.

In the accompanying drawings, the dimensions of the optical module, the optical sheet, the optical unit, the container, the display panel, and other structures are shown in an enlarged scale than actual for clarity of the present invention. In the present invention, the optical module, the optical sheet when the optical module, the optical sheet, the optical unit, the storage container, the display panel, and other structures are referred to as being formed "on", "upper" or "lower". , Optical units, storage containers, display panels and other structures directly formed on or below the optical modules, optical sheets, optical units, storage containers, display panels and other structures, or other optical modules, optical Sheets, optical units, storage containers, display panels, and other structures may be further formed on the substrate.

Optical module ( Optical Module )

1 is a perspective view showing an optical module according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line II ′ of FIG. 1. 3 is a side view of the A direction of FIG.

1 to 3, an optical module 100 according to the present embodiment is a component that improves optical distrubution in a liquid crystal display, which is one of display devices. It can be used as a light guide plate (LGP).

The optical module 100 includes a body 10, a fixing portion 20, and a protrusion portion 30.

Examples of materials that can be used as the body 10 of the optical module 100 may include a transparent polymethacryl acrylate (PMMA) resin or the like.

Specifically, the body 10 has a rectangular parallelepiped plate shape, for example. The body 10 having a rectangular shape includes four side faces 12 and a light existing face 14 disposed perpendicular to the sides 12.

In the present exemplary embodiment, at least one of the four side surfaces 12 into which light is incident is defined as a light incident face 12a. In this embodiment, two side surfaces connected to the light incident surface 12a will be defined as first side surfaces 12a and second side surfaces 12b, respectively. In this embodiment, the first side 12a and the second side 12b face each other.

Light incident into the body 10 through the light incident surface 12a is reflected and / or refracted within the body 10 so that most of the light is emitted to the light exit surface 14. In this case, in order to emit most of the light through the light exit surface 14, light reflection patterns (not shown) may be disposed and / or formed on a surface facing the light exit surface 14.

The fixing part 20 is formed on the side surface 12 of the body 10 connected to the light incident surface 12c. In the present embodiment, the fixing part 20 may be formed on one side, for example, the first side 12a formed in the body 10. Alternatively, the fixing part 20 may be formed on a pair of side surfaces formed in the body 10, for example, the first side surface 12a and the second side surface 12b, respectively. In this embodiment, the fixing part 20 is formed on the first and second side surfaces 12a and 12b, respectively.

Hereinafter, the fixing portion 20 formed on the first side surface 12a is defined as the first fixing portion 22, and the fixing portion 20 formed on the second side surface 12b is the second fixing portion 24. Is defined as In the present embodiment, the fixing part 20 includes a first fixing part 22 and a second fixing part 24.

The first fixing part 22 and the second fixing part 24 according to the present exemplary embodiment are coupled to a receiving container (not shown) for accommodating the body 10, whereby the body 10 is separate. It is fixed to the storage container without the fixing member.

The first fixing portion 22 protrudes from the first side surface 12a to a predetermined height. In the present embodiment, the first fixing portion 22 protrudes in a rod shape along the first side surface 12a. Alternatively, a plurality of first fixing parts 22 may protrude in the form of protrusions on the first side surface 12a.

Referring to FIG. 3, the first fixing part 22 may have, for example, a length substantially equal to the length L of the first side surface 12a. Alternatively, the first fixing part 22 may be formed in a recess shape from the surface of the first side surface 12a.

The second fixing part 24 protrudes from the surface of the second side surface 12b. In the present embodiment, the second fixing part 24 is formed in the form of a protrusion from the second side surface 12b. In the present embodiment, about two to three second fixing parts 24 protrude to a predetermined height from the second side surface 12b. In this case, the upper and lower edges of the second fixing part 24 protruding from the second side surface 12b may be chamfered.

According to the above, the first fixing part 22 and the second fixing part 24 protruding from the first side surface 12a and the second side surface 12b are, for example, engaging projections coupled to the storage container or the like. It functions as a (fixing protrusion).

The projection part 30 protrudes in a band shape along the edge of the light exit surface 14 when viewed in a plane to form a receiving portion 32 on the light exit surface 14. do. In the present embodiment, the accommodating portion 32 formed on the light exit surface 14 is for accommodating optical sheets or the like without a separate fixing member.

FIG. 4 is an exploded perspective view illustrating optical sheets housed in a housing of the body illustrated in FIG. 1.

Referring to FIG. 4, the optical module 100 according to the present embodiment may further include at least one optical sheet 40.

The optical sheet 40 according to the present embodiment is accommodated in the accommodating portion 32 formed on the light exit surface 14. The optical sheets 40 improve the optical characteristics of the outgoing light emitted to the light exit surface 14. Specifically, the optical sheet 40 may include a diffusion sheet for diffusing the light emitted from the light exit surface 14, a prism sheet for condensing the light diffused from the diffusion sheet, and the like. Can be. In the present embodiment, it is preferable that the overall thickness of the optical sheet 40 is substantially the same as the projecting height of the projecting portion 30.

FIG. 5 is an exploded perspective view illustrating the light source unit disposed in the body illustrated in FIG. 1. FIG. 6 is a cross-sectional view taken along the line II-II 'of FIG. 5.

5 and 6, the optical module 100 according to the present embodiment further includes a light source unit 50. The light source unit 50 according to the present exemplary embodiment provides light into the body 10 through the light incident surface 12c of the body 10. The optical unit 50 according to the present embodiment includes, for example, a light source 55 such as a Cold Cathod Fluorescent Lamp (CCFL) or a Light Emitting Diode (LED). can do. In this embodiment, a light emitting diode is used as the light source 55 of the optical unit 50.

In the present embodiment, a plurality of light sources 55 such as light emitting diodes are arranged at regular intervals on the light incident surface 12c. In this embodiment, three light sources 55 are arranged on the light incident surface 12c.

7 is a perspective view of a light source module including an optical unit according to another embodiment of the present invention.

Referring to FIG. 7, the optical unit 50 includes a light source 55 and a circuit board 57.

The light source 55 may be, for example, a light emitting diode, and the circuit board 57 may be, for example, a flexible printed circuit board (FPC). The light source 55, which is a light emitting diode, is mounted on the circuit board 57. In this embodiment, for example, three light sources 55 are mounted on the circuit board 57.

In order to more efficiently use the light generated from the optical unit 50 having such a structure, a light source receiving recess 12d may be formed in the body 10. In the present embodiment, the light source accommodating groove 12d is formed in the shape of a groove for accommodating the light source 55 from the surface of the light incident surface 12c of the body 10 or from the surface of the light exit surface 14. It may be formed in a groove shape for accommodating the 55.

FIG. 8 is a perspective view illustrating a light blocking member disposed in the optical unit illustrated in FIG. 1.

Referring to FIG. 8, the optical unit 100 may further include a light blocking member 60 as well as the body 10. The light blocking member 60 corresponds to a portion of the light emitting surface 14 of the body 10 that corresponds to a non-effective display region disposed around an effective display region in which an image is displayed. To improve the display quality of the image. In the present embodiment, the light blocking member 60 may be formed of a light absorbing substance absorbing light or a light reflecting substance reflecting light. In the present embodiment, the light blocking member 60 includes a light absorbing material.

In addition, the light blocking member 60 according to the present exemplary embodiment may cover the upper surface of the protrusion 30. In addition, the light blocking member 60 may cover not only the upper surface of the protrusion 30 but also the side surface 12 of the body 10.

Backlight assembly ( Back Light Assembly )

9 is an exploded perspective view of a backlight assembly according to an embodiment of the present invention. 10 is a cross-sectional view of the assembled backlight assembly. 11 is a cross-sectional view showing the assembly of the optical sheet and the light blocking member to the assembled backlight assembly.

9 and 10, the backlight assembly 300 includes an optical module 100, a light source unit 50, and a storage container 200.

The optical module 100 has a body 10, a fixing portion 20, and a protrusion 30.

The body 10 of the optical module 100 has, for example, a rectangular parallelepiped plate shape made of a transparent polymethacryl acrylate (PMMA) resin. The body 10 has four sides 12 and a light exit surface 14 connected perpendicularly to the sides 12.

In this embodiment, light is incident on the light incident surface 12a which is one of the four side surfaces 12. In addition, a first side surface 12a and a second side surface 12b are connected to the light incident surface 12a, and the first side surface 12a and the second side surface 12b are disposed to face each other.

Light is incident into the body 10 through the light incident surface 12a, and the incident light is reflected and / or refracted in the body 10, and most of the light is emitted through the light exit surface 14. . In order to emit most of the light through the light exit surface 14, light reflection patterns (not shown) for reflecting light are disposed and / or formed on a surface facing the light exit surface 14.

The side surface 12 of the body 10 connected to the light incident surface 12c includes a fixing part 20. For example, the fixing part 20 may be formed on the first side surface 12a which is one of the side surfaces 12. Alternatively, the pair of side surfaces formed in the body 10, for example, the first side surface 12a and the second side surface 12b may include fixing parts 20, respectively. In this embodiment, the fixing part 2 is formed in the 1st side surface 12a and the 2nd side surface 12b, respectively.

Hereinafter, the fixing portion 20 formed on the first side surface 12a is defined as the first fixing portion 22, and the fixing portion 20 formed on the second side surface 12b is the second fixing portion 24. Is defined as

The first fixing portion 22 disposed on the first side surface 12a protrudes from the first side surface 12a to a predetermined height, and the first fixing portion 22 has a rod shape along the first side surface 12a. It may protrude. Alternatively, a plurality of first fixing parts 22 may protrude in the form of protrusions on the first side surface 12a. Alternatively, the first fixing part 22 may be formed in a recess shape from the surface of the first side surface 12a.

In the present embodiment, the length of the first fixing part 22 may be substantially the same as the length L of the first side surface 12a, for example.

The second fixing part 24 disposed on the second side surface 12b protrudes from the surface of the second side surface 12b. In the present embodiment, the second fixing part 24 may be formed in the form of a protrusion from the second side surface 12b. In the present embodiment, about two to three second fixing parts 24 protrude from the second side 12b to a predetermined height. In this case, the upper and lower edges of the second fixing part 24 protruding from the second side surface 12b may be chamfered.

The projection part 30 protrudes in a band shape along the edge of the light exit surface 14 when viewed in plan view, and forms the accommodating part 32 on the light exit surface 14. In the present embodiment, the accommodating part 32 formed on the light exit surface 14 is for accommodating optical sheets or the like without a separate structure.

The optical unit 50 includes a light source 55 and a circuit board 57. The light source 55 may be, for example, a light emitting diode, and the circuit board 57 may be, for example, a flexible printed circuit board (FPC).

The light source 55, which is a light emitting diode, is mounted on the circuit board 57. In this embodiment, for example, three light sources 55 are mounted on the circuit board 57.

In order to more efficiently use the light generated from the optical unit 50 having such a structure, a light source accommodating groove 12d may be formed in the body 10. In the present embodiment, the light source accommodating groove 12d is formed in the shape of a groove for accommodating the light source 55 from the surface of the light incident surface 12c of the body 10 or from the surface of the light exit surface 14. It may be formed in a groove shape for accommodating the 55.

The storage container 200 accommodates the optical module 100 and the light source unit 50. In order to accommodate the optical module 100 and the light source unit 50, the storage container 200 includes sidewalls 210 and a bottom plate 220 connected to the sidewalls 210. In this embodiment, the storage container 200, for example, may be made of a metal plate or synthetic resin material.

In this embodiment, the sidewalls 210 have, for example, four sidewalls 210 to receive the body 10 of the optical module 100. In the present exemplary embodiment, a sidewall facing the first side surface 12a of the body 10 of the optical module 100 among the four sidewalls 210 is defined as the first sidewall 211, and the A side wall facing the second side 12a of the body 10 will be defined as a second side wall 212.

The first side wall 211 has a first coupling portion 213 for fixing the body 10 of the optical module 100, and the second side wall 212 fixes the body 10 of the optical module 100. It has a second coupling portion 214 to.

The first coupling portion 213 is coupled to the first fixing portion 22 protruding from the first side surface 12a of the body 10. The first coupling portion 213 cuts the first side wall 211 at a predetermined width from the top of the first side wall 211 toward the bottom of the first side wall 211, and the cut portion cuts the bottom plate 220. It is formed by bending the cutout to the inside of the storage container 200 to face the.

In the present embodiment, at least one first coupling portion 213 is formed, for example, three first coupling portions 213 are formed on the first sidewall 211.

The first coupling part 213 fixes the first fixing part 22 protruding from the first side surface 12a of the body 10 of the optical module 100.

Meanwhile, the second coupling part 214 prevents the body 10 of the optical module 100 coupled to the first coupling part 213 of the first sidewall 211 from being separated from the storage container 200. In order to implement this, the second coupling part 214 is formed on the second side wall 212 facing the first side wall 211. In the present embodiment, the second coupling portion 214 may be, for example, an opening penetrating through the second sidewall 212. The second coupling part 214 is positioned at a position corresponding to the second fixing part 24 to fit into the second fixing part 24 protruding from the second side surface 12b of the body 10 of the optical module 100. Is formed.

On the other hand, the light reflecting member reflecting the light leaked from the optical module 100 back to the optical module 100 on the bottom surface 220 of the storage container 200 facing the body 10 of the optical module 100 230 may be further disposed.

FIG. 11 is a cross-sectional view illustrating optical sheets and light blocking members disposed in a housing of the optical module illustrated in FIG. 10.

Referring to FIG. 11, an optical sheet 40 including a diffusion sheet, a prism sheet, and the like is disposed in the housing portion 32 formed by the protrusion 30 on the body 10 of the optical module 100. Since the optical sheet 40 according to the present embodiment is disposed inside the accommodating portion 32 formed by the protrusion 30, horizontal movement is limited.

Meanwhile, in order to prevent the optical sheets 40 from being separated from the accommodating part 32, a light blocking member 60 overlapping the edge of the optical sheets 40 is disposed on the upper surface of the protrusion part 30. The light blocking member 60 not only prevents the separation of the optical sheets 40 but also prevents light from leaking between the optical module 100 and the optical sheets 40.

Display device ( Display Device )

12 is an exploded perspective view illustrating a display device according to an exemplary embodiment of the present invention. The display device according to the exemplary embodiment of the present invention is substantially the same as the optical module and the backlight assembly described above with reference to FIGS. 1 to 11 except for the display panel and the top case. Therefore, duplicate description of the same components will be omitted, and the same reference numerals and names will be given to the same parts.

Referring to FIG. 12, the display device 400 includes an optical module 100, a storage container 200, a display panel 300, and a top case 370.

The first fixing part 22 of the body 10 of the optical module 100 is coupled to the first coupling part 213 formed on the first sidewall 211 of the storage container 200, and the first fixing part 22 of the body 10 is formed. The second fixing part 24 is coupled to the second coupling part 214 formed on the second side wall 212 of the storage container 200. Thus, the optical module 100 is coupled to the storage container 200 without a separate fixing member.

Subsequently, the display panel 300 is disposed on the upper surface of the optical module 100. The display panel 300 is disposed to face the TFT substrate 310 having the thin film transistors and the pixel electrode connected to each thin film transistor, the TFT substrate 310, and the color filter substrate 320 and the TFT substrate including the color filter. And a liquid crystal layer (not shown) disposed between the color filter substrate. Reference numeral 340 is a flexible circuit board disposed on the TFT substrate to provide a drive signal to the TFT substrate.

The top case 370 may be optionally included in the display device 400. The top case 370 prevents the display panel 300 and the optical module 100 from being separated from the storage container 200.

The top case 370 may include a first surface 360 and a second surface 350 extending from the first surface 360. The first surface 360 has a rectangular frame shape surrounding an invalid display area in which an image is not displayed as an edge portion of the display panel 300, and the second surface 350 has sidewalls 210 of the storage container 200. Extends from the first surface 260 to be in contact with them.

As described in detail above, since the optical module according to the present invention can be fixed to a storage container without a separate fixing member, it is possible to reduce the components of the display device, thereby greatly reducing the production cost, It has the effect that it can manufacture more compactly.

Although the detailed description of the present invention has been described with reference to the embodiments of the present invention, those skilled in the art or those skilled in the art will have the spirit and scope of the present invention as set forth in the claims below. It will be appreciated that various modifications and variations can be made in the present invention without departing from the scope of the art.

Claims (19)

A plate-shaped body having a light incident surface on which light is incident and a light exit surface on which light is emitted; A fixing part formed on an opposite side of the body connected to the light incident surface; And And a protrusion protruding along an edge of the light exit surface of the body to form a receiving part on the light exit surface. According to claim 1, wherein the side surface comprises a first side and the second side facing the first side, wherein the fixing portion is a first fixing portion formed on the first side and the second fixing portion formed on the second side Optical module comprising a. The optical module of claim 2, wherein the first fixing part and the second fixing part are protrusions protruding from the first and second side surfaces. The optical module of claim 2, wherein the first fixing part has a rod shape having a length substantially equal to a length of the first side surface. The optical module of claim 2, wherein the first fixing part has a groove shape. The optical module of claim 2, wherein the second fixing part has a protrusion shape having a length shorter than a length of the second side surface. The optical module according to claim 1, further comprising at least one optical sheet housed in the receiving groove in order to improve the luminance distribution of the emitted light emitted to the light exit surface. An optical module according to claim 1, comprising at least one light source unit for providing light to the light incident surface. The optical module of claim 8, wherein the light incident surface of the body comprises a light source accommodating groove for accommodating the light source unit. The optical module of claim 8, wherein the light source unit comprises a light emitting diode that is a point light source. The optical module of claim 10, wherein the light source unit further comprises a circuit board on which the light emitting diodes are disposed. The optical module of claim 1, wherein a light blocking member is disposed on an upper surface of the protrusion to block light leaked through the upper surface of the protrusion. A plate-shaped body having a light incidence surface into which light is incident and a light exit surface in which light is emitted, first and second fixing portions formed on both opposite sides of the body connected to the light incidence surface, and the light An optical module including a protrusion protruding along an edge of the light exit surface of the body to form an accommodation portion at the exit surface; A light source unit providing the light to the light incident surface; And A first sidewall accommodating the optical module and the light source unit, the first sidewall having a first coupling portion to engage with the first fixing portion, a second sidewall having a second coupling portion to couple to the second fixing portion, and the first and second portions; 2. A backlight assembly comprising a receptacle comprising a bottom plate connected with two sidewalls. The method of claim 13, wherein the first coupling portion has a bent portion bent by cutting a portion of the first side wall for pressing and fixing the upper surface of the first fixing portion having a rod shape, the second coupling portion has a protrusion shape And an opening coupled with the second fixing portion. The backlight assembly of claim 13, wherein at least one optical sheet is disposed in the housing to improve an optical distribution of the light emitted to the light exit surface. The backlight assembly of claim 13, wherein a light source accommodating groove for accommodating the light source is formed in the light incident surface of the optical module corresponding to the light source of the light source unit. The backlight assembly of claim 13, wherein a light reflection member is disposed between the optical module and the bottom surface to reflect light leaked from the optical module. A plate-shaped body having a light incident surface to which light is incident and a light exit surface to which light is emitted, a first fixing portion protruding from an opposing first side of the body connected to the light incident surface, opposing the first side surface An optical module including a second fixing part protruding from the second side and a protrusion protruding along an edge of the light exit surface of the body to form an accommodating part on the light exit surface; Optical sheets housed in the housing to improve characteristics of light emitted from the light exit surface; An optical unit including a light source for providing the light to the light incident surface and a circuit board on which the light source is mounted; A first sidewall accommodating the optical module, the optical sheets, and the light source unit, the first sidewall having a first coupling portion engaging with the first fixing portion, a second sidewall having a second coupling portion engaging with the second fixing portion, and A storage container including a bottom plate connected to the first and second sidewalls; And And a display panel accommodated in the storage container and disposed on the optical module. 19. The method of claim 18, wherein the first coupling portion is a bent portion cut by bending the first side wall for pressing the first fixing portion, the second coupling portion is an opening that is fitted to the second fixing portion. Display device.

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