KR101337065B1 - Backlight assembly and liquid crystal display device having the same - Google Patents

Abstract

The present invention provides a backlight assembly having an improved assembly structure of a support main and a bottom cover, and a liquid crystal display device having the same. The disclosed backlight assembly includes a bottom cover including both side surfaces having at least one hole formed therein, and a support main having a plurality of fixing protrusions contacting inner wall surfaces of both sides of the bottom cover and fastened to the fixing holes.

Hook, Assembling, Fixing Hole, Support Main, Bottom Cover

Description

BACKLIGHT ASSEMBLY AND LIQUID CRYSTAL DISPLAY DEVICE HAVING THE SAME}

1 is an exploded perspective view showing a conventional backlight assembly.

2 is a perspective view illustrating a state in which the backlight assembly of FIG. 1 is assembled.

3 is a cross-sectional view illustrating the backlight assembly taken along the line II ′ of FIG. 2.

4 is a cross-sectional view illustrating the backlight assembly taken along the line II-II ′ of FIG. 2.

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

6 is a perspective view illustrating a state in which the backlight assembly of FIG. 5 is assembled.

7 is a cross-sectional view illustrating the backlight assembly taken along the line III-III ′ of FIG. 6.

FIG. 8 is a detailed view illustrating an area A in which the support main and the bottom cover are assembled according to the exemplary embodiment of FIG. 6.

Description of the Related Art [0002]

110: backlight assembly. 120: support main

150: lamp 180: bottom cover

200: hook 201: support surface

203: fixing hole 205: locking surface

The present invention relates to a backlight assembly, and more particularly, to a backlight assembly having an improved assembly structure of a support main and a bottom cover, and a liquid crystal display device having the same.

BACKGROUND ART A liquid crystal display device is a display device that displays an image by controlling an amount of light passing through a liquid crystal, and is widely used for advantages such as thinning and low power consumption.

Unlike the CRT, the liquid crystal display is not a display device that emits light by itself. Thus, a back light unit having a separate light source that provides light to visually represent an image is used on the back of the liquid crystal panel. .

1 is an exploded perspective view showing a conventional backlight assembly, Figure 2 is a perspective view showing a state in which the backlight assembly of Figure 1 assembled.

3 is a cross-sectional view illustrating the backlight assembly taken along the line II ′ of FIG. 2, and FIG. 4 is a cross-sectional view illustrating the backlight assembly taken along the line II ′ of FIG. 2.

As shown in FIGS. 1 to 4, in the conventional backlight assembly 10, lamps 50 are disposed in both sides of a bottom cover 80 made of a metal material, and the reflection is reflected in the bottom cover 80. The sheet 70, the light guide plate 40, and the optical sheets 30 are sequentially seated.

The backlight assembly 10 is disposed to surround the lamp 50, and includes a lamp housing 51 for guiding light emitted from the lamp 50 to the light guide plate 40, and the optical sheet 30. It further includes a support main 20 of a shape surrounding the border of the.

The support main 20 is generally made of a plastic having elasticity of a polyethlene-terephthalate (PET) material.

Both sides of the support main 20 are disposed in a form surrounding the outer sides of both sides of the bottom cover 80 on which the lamp 50 is disposed with reference to FIG. 3. The support main 20 and the bottom cover 80 may be fixed by a screw 90.

On the other hand, the other two side surfaces of the support main 20 are in contact with both inner wall surfaces of the bottom cover 80 in which the lamp 50 is not disposed with reference to FIG. 4.

As described above, both sides of the support main 20 surround the outer sides of both sides of the bottom cover 80 with reference to FIG. 3 to support the fixing of the reflective sheet 70, the light guide plate 40, and the optical sheets 30. This is to prevent bending of the main 20.

On the other hand, referring to FIG. 4, the other two side surfaces of the support main 20 are in contact with the inner wall surfaces of both sides of the bottom cover 80 due to the flow of the reflective sheet 70, the light guide plate 40, and the optical sheets 30. This is to prevent the generation of foreign substances by friction with the inner surface of the bottom cover 80 made of a metal material.

Although not shown in detail on the backlight assembly 10, the liquid crystal panel is seated to complete the assembly of the liquid crystal display.

The conventional backlight assembly 10 described above has the following problems after assembly is completed.

First, since the support main 20 is made of PET and has a predetermined elasticity, both sides of the support main 20 in contact with the inner surface of the bottom cover 80 protrude in the direction of an arrow (→). Occurs frequently. As described above, when both sides of the support main 20 protrude in the direction of an arrow (→), the reflective sheet 70, the light guide plate 40, and the optical sheets 30 stored inside the support main 20 are bent or mutually. There was a problem of causing a failure that is broken by friction.

In order to improve the problem that both sides of the support main 20 is protruded as described above, when fixing by using a screw (screw) or the like as a separate fixing means, the material cost increases, the number of assembly processes and assembly time increases and eventually There was a problem of lowering the yield of the liquid crystal display device.

An object of the present invention is to provide a backlight assembly that can improve the failure caused by breakage of the backlight assembly by a new fixing structure of the support main and the bottom cover.

In addition, an object of the present invention is to provide a backlight assembly that is easy to assemble and to reduce the assembly process and assembly time by improving the fixing structure of the support main and the bottom cover.

In addition, an object of the present invention is to provide a liquid crystal display device that can improve the yield of the liquid crystal display device by using a new fixing structure of the support main and the bottom cover.

In order to achieve the above object, the backlight assembly according to the present invention,

A bottom cover including both sides having at least one hole formed therein; And

And a support main having a plurality of fixing protrusions contacting inner wall surfaces of both sides of the bottom cover and fastened to the fixing holes.

In addition, the liquid crystal display device according to the present invention,

A bottom cover including both sides having at least one hole formed therein;

A support main having a plurality of fixing protrusions contacting inner wall surfaces of both sides of the bottom cover and fastened to the fixing holes; And

And a liquid crystal panel disposed on the support main to display a predetermined image.

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

5 is an exploded perspective view illustrating a backlight assembly according to an exemplary embodiment of the present invention, and FIG. 6 is a perspective view illustrating a state in which the backlight assembly of FIG. 5 is assembled.

FIG. 7 is a cross-sectional view illustrating a backlight assembly taken along a line III-III ′ of FIG. 6, and FIG. 8 is a view illustrating region A in which a support main and a bottom cover are assembled according to an embodiment of the present invention of FIG. 6. One detail.

5 to 8, the backlight assembly 110 according to an exemplary embodiment of the present invention includes a bottom cover 180 made of a metal material and disposed on both sides of the bottom cover 180 to emit light. A lamp 150, a light guide plate 140 disposed to form one surface with the lamp 150, and converting linear light into surface light; and light emitted from the lamp 150 to surround the lamp 150. A lamp housing 151 for guiding the light guide plate 140 to the light guide plate 140, an optical sheet 130 disposed on the light guide plate 140 to diffuse and collect light, and a light guide plate disposed on a rear surface of the light guide plate 140. 140) and a reflective sheet 170 for reflecting the light irradiated to the back.

The backlight assembly 110 further includes a support main 120 disposed on the optical sheets 130 and fastened to the bottom cover 180.

The lamp 150, the lamp housing 151, the reflective sheet 170, the light guide plate 140, and the optical sheets 130 are sequentially seated on the bottom cover 180, and on the optical sheets 130. The support main 120 is seated. The support main 120 is coupled to the bottom cover 180 side, thereby completing the assembly of the backlight assembly 110.

Although not shown, the assembly of the liquid crystal display may be completed by mounting the liquid crystal panel on the backlight assembly 110 where the assembly is completed and fixed by an external case.

The support main 120 is provided with a plurality of hooks 200 protruding at predetermined intervals on the outer sides of the support main 120 at predetermined intervals.

Both side surfaces of the bottom cover 180 corresponding to both side surfaces of the support main 120 having the hook 200 are formed of a plurality of support surfaces 201 formed in a tab shape at predetermined intervals, and the support surface ( A fixing hole 203 is formed in the 201 to be fastened to the hook 200.

The hook 200 includes a locking surface 205 so as not to fall after being fastened with the fixing hole 203.

The number and size of the hook 200 and the fixing hole 203 may be changed depending on the size and type of the backlight assembly.

Both sides of the support main 120 in which the hook 200 is formed are fastened to contact the support surface 201 of the bottom cover 180 in which the fixing hole 203 is formed. In this case, both side surfaces of the support main 120 contact the inner wall surface of the support surface 201.

As described above, the both sides of the support main 120 having the hook 200 formed thereon are in contact with the inner wall surface of the support surface 201 for the reflective sheet 170, the light guide plate 140, and the optical sheet 130. This is to prevent the occurrence of foreign substances by friction with the support surface 201 of the bottom cover 180 made of a metal material by the flow of. Accordingly, the reflective sheet 170, the light guide plate 140, and the optical sheets 130 may be in contact with the side surfaces of the support main 120 made of a PET material to minimize the generation of foreign substances.

Both sides of the support surface 201 and the support main 120 are fastened to the fixing hole 203 and the hook 200 by the reflective sheet 170 and the light guide plate 140 during the assembly or movement of the backlight assembly. And to prevent damage due to the vertical flow of the optical sheet (130).

Both sides of the support main 120 where the hook 200 is not formed are regions in which the lamp 150 is disposed, and both sides of the bottom cover 180 to improve the bending of the support main 120. It is fastened to surround. At this time, both sides of the support main 120 surrounding the outer surface of the bottom cover 180 may be fastened with a screw or the like, although not shown in the drawing.

When the hook 200 of the support main 120 is fastened to the fixing hole 203 of the bottom cover 180, the hook 200 is hardly released. By pressing the hook 200 by artificial force, it is easy to use elasticity. Can be separated. Therefore, the fastening structure as described above may have an advantage of being easily removable when an internal unit such as the lamp 150 occurs during the inspection process after the assembly of the backlight assembly 110 is completed.

The backlight assembly 110 according to the exemplary embodiment of the present invention described above has a fixing hole 203 formed on the support surface 201 of the bottom cover 180 and the support main 120 to correspond to the fixing hole 203. Hook 200 formed on both sides of the) is fastened, it is possible to improve the assembly of the bottom cover 180 and the support main 120, the reflection sheet 170 accommodated inside the support main 120 In addition, damage to the light guide plate 140 and the optical sheets 130 and generation of foreign matters may be prevented.

The backlight assembly 110 having the above structure is typically an edge type, in which the lamp 150 is disposed along at least one inner side length of the support main 120, but is not shown in the drawing, but the front bottom cover 180 is not shown. It is also applicable to the direct type structure in which a large number of lamps are arranged at.

As described above, according to the present invention, the support main and the bottom cover are fastened by hooks and fixing holes, and prevent the flow of the support main fixed to the inner side of the bottom cover to prevent defects caused by breakage of the inner unit. There is an effect that can be improved.

In addition, the present invention is a fixed structure by the hook and the fixing hole, there is an advantage that can be easily removable, and reducing the assembly process and assembly time.

In addition, the present invention has the effect of improving the yield of the liquid crystal display by applying a simple fastening structure of the hook and the fixing hole of the support main and the bottom cover.

Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (6)

lamp; A bottom cover to accommodate the lamp; And A support main fastened to the bottom cover to receive an optical sheet; / RTI > The bottom cover is. A pair of first sides and a pair of second sides of the two pairs of four sides facing each other, The first side is formed with a plurality of support surfaces spaced in a tab shape, The support main A pair of first sides and a pair of second sides of the two pairs of four sides facing each other, The outer surface of the first side of the support main corresponding to the first side of the bottom cover is formed with a plurality of hooks of the projecting shape spaced apart, The support surface includes a fixing hole fastened to the hook, The hook includes a locking surface coupled to the fixing hole, A first side surface of the support main is in contact with an inner side surface of the support surface, The second side of the support main surrounds the outer surface of the second side of the bottom cover, The lamp is accommodated in the second side of the bottom cover, The optical sheet is in contact with the inner surface of the second side of the support main. delete delete The method of claim 1, And said hook has elasticity. delete lamp; A bottom cover to accommodate the lamp; And A support main fastened to the bottom cover to receive an optical sheet; A backlight assembly comprising a; And A liquid crystal panel disposed on the support main to display an image; The bottom cover is. A pair of first sides and a pair of second sides of the two pairs of four sides facing each other, The first side is formed with a plurality of support surfaces spaced in a tab shape, The support main A pair of first sides and a pair of second sides of the two pairs of four sides facing each other, The outer surface of the first side of the support main corresponding to the first side of the bottom cover is formed with a plurality of hooks of the projecting shape spaced apart, The support surface includes a fixing hole fastened to the hook, The hook includes a locking surface coupled to the fixing hole, A first side surface of the support main is in contact with an inner side surface of the support surface, The second side of the support main surrounds the outer surface of the second side of the bottom cover, The lamp is accommodated in the second side of the bottom cover, And the optical sheet is in contact with an inner surface of the second side surface of the support main.

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