KR101981587B1 - Liquid crystal display device - Google Patents

Abstract

The liquid crystal display device according to the present invention is characterized in that a plurality of fastening protrusions formed on a support main body and a plurality of fixing protrusions formed on a cover bottom correspond to each other, thereby fixing the backlight unit, in particular, the light guide plate more stably.
In addition, the side reflection member may surround the outer surfaces of the plurality of fastening protrusions, thereby minimizing the optical loss of the light guide plate.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device capable of stably fixing a light guide plate.

A liquid crystal display device (LCD), which is advantageous for moving picture display and has a large contrast ratio and is actively used in TVs and monitors, exhibits optical anisotropy and polarization properties of a liquid crystal, And the like.

Such a liquid crystal display device has a liquid crystal panel in which a liquid crystal panel is interposed between two adjacent substrates through a liquid crystal layer as an essential component and changes the alignment direction of the liquid crystal molecules in an electric field in the liquid crystal panel to realize a difference in transmittance do.

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 backlight unit having a light source is disposed on the back of the liquid crystal panel.

The backlight unit includes a light source and is divided into a direct type and an edge type according to the position of a light source. The direct-type backlight unit emits light from a light source by arranging a light source under the liquid crystal panel The backlight unit of the side-type type has a structure in which a light guide plate is disposed under the liquid crystal panel and a light source is disposed on at least one side surface of the light guide plate, And the emitted light is indirectly supplied to the liquid crystal panel.

At this time, the side-type backlight unit is easier to manufacture than the direct-type backlight unit, and is thin, light in weight, and low in power consumption.

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

As shown in Fig. 1, the liquid crystal display module includes a liquid crystal panel 10 constituted by first and second substrates 12 and 14 and a backlight unit 20 located behind the liquid crystal panel.

The liquid crystal panel 10 is a part that plays a key role in image display and is composed of first and second substrates 12 and 14 which are bonded to each other with a liquid crystal layer interposed therebetween.

First and second polarizing plates 19a and 19b selectively transmitting only specific light are attached to the outer surfaces of the first and second substrates 12 and 14, respectively.

The backlight unit 20 includes an LED assembly (not shown), a reflection plate 25 that is seated on the cover bottom 50, a light guide plate 23 that is positioned above the reflection plate 25, And a plurality of optical sheets 21 interposed therebetween.

The liquid crystal panel 10 and the backlight unit 20 are modularized through the top cover 40, the support main body 30 and the cover bottom 50. The edges of the liquid crystal panel 10 and the backlight unit 20 are square- The top cover 40 covering the front edge of the liquid crystal panel 10 and the cover bottom 50 covering the back surface of the backlight unit 20 are joined at the front and rear sides respectively, (30).

A plurality of fixing pins 80 are inserted in a direction toward the liquid crystal panel 10 through a plurality of through holes formed in the cover bottom 50 to prevent the light guide plate 23 from flowing. The fixing pin 80 is located at the edge of the liquid crystal display module, the non-display area.

On the other hand, in recent years, the liquid crystal display device has been widely used, such as a desktop computer monitor and a wall-mounted television, as well as a portable computer, and has been studied for a liquid crystal display device having a wide bezel width Is actively proceeding.

However, as the width of the bezel is reduced, the number of the fixing pins 80 is located close to the display area, so that the light leakage phenomenon that the light emitted from the light guide plate 23 leaks to the outside increases.

Further, since the plurality of fixing pins 80 are located in the non-display area, there is a problem in reducing the width of the bezel.

According to an aspect of the present invention, there is provided a liquid crystal display device capable of minimizing a width of a bezel while fixing a light guide plate more stably by fixing a light guide plate by combining support main and cover bottoms each having a coupling means .

It is another object of the present invention to provide a liquid crystal display device capable of preventing deterioration of image quality due to light leakage by covering a fixing member with a reflecting member.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a liquid crystal panel; A backlight unit disposed on a rear surface of the liquid crystal panel and including an LED assembly; A support main body having a rectangular frame shape and including the first to fourth parts, the frame main body having an edge of the liquid crystal panel and the backlight unit; And a cover bottom having a bottom surface and a side surface coupled to the support main at a back surface of the backlight unit, wherein a plurality of fastening protrusions including a fastening groove are formed on a back surface of each of the first to fourth parts of the support main A plurality of fastening protrusions corresponding to the plurality of fastening protrusions and inserted into the plurality of fastening grooves are formed on the bottom surface of the cover bottom, The width of the first protrusion formed on the first portion is equal to the distance between the side surface of the cover bottom and the fixing protrusion, Wherein the first protrusion is inserted into a space between a side surface of the cover bottom and the fixing protrusion, It provides an apparatus.

The backlight unit may further include a light guide plate facing at least one side face of the LED assembly, and a plurality of optical sheets positioned at an upper portion of the light guide plate, wherein the LED assembly includes at least one of the second, Wherein the light guide plate and the plurality of optical sheets include a plurality of through holes corresponding to the plurality of fastening protrusions.

And a plurality of side reflective members surrounding each of the plurality of fastening protrusions.

Wherein each of the plurality of side reflection members surrounds an outer side surface of the outer side surface of each of the plurality of fastening protrusions which abuts at least one side of the light guide plate.

Each of the plurality of through holes is characterized in that a part of the side surface is open.

In another aspect, the present invention provides a liquid crystal display comprising: a liquid crystal panel; A backlight unit disposed on a rear surface of the liquid crystal panel; A support main body having a rectangular frame shape and including the first to fourth parts, the frame main body having an edge of the liquid crystal panel and the backlight unit; And a cover bottom having a bottom surface and a side surface coupled to the support main at a back surface of the backlight unit, wherein a plurality of fastening protrusions including a fastening groove are formed on a back surface of each of the first to fourth parts of the support main A plurality of fastening protrusions corresponding to the plurality of fastening protrusions and inserted into the plurality of fastening grooves are formed on the bottom surface of the cover bottom, Wherein a width of the first protrusion formed on the first portion of the support main is equal to a distance between a side surface of the cover bottom and the fixing protrusion and the first protrusion is spaced from the side of the cover bottom, Wherein the backlight unit comprises: a light guide plate positioned below the liquid crystal panel; And an LED disposed between the light guide plate and the cover bottom. The light guide plate includes a through hole corresponding to the fastening protrusion.

The first protrusion has the same width as the distance between the side surface of the cover bottom and the fixing protrusion in both of the first to fourth parts of the support main body and is inserted into the space between the side surface of the cover bottom and the fixing protrusion .

And the lower surface of the first projection and the lower surface of the second projection are in contact with the bottom surface of the cover bottom.

According to the liquid crystal display device of the present invention, the light guide plate can be more stably fixed by fixing the light guide plate while the support main and cover bottoms each having the combining means are combined by the combining means.

As a result, it is not necessary to use the fixing pin to fix the light guide plate as in the conventional case, thereby reducing the component cost and assembly time.

Particularly, by covering the coupling means with the reflective member, it is possible to prevent the light leakage phenomenon and improve the image quality of the liquid crystal display device.

1 is a sectional view of a conventional liquid crystal display device module.
2 is an exploded perspective view schematically showing a liquid crystal display module according to an embodiment of the present invention.
3 is a cross-sectional view showing a part of a liquid crystal display module according to an embodiment of the present invention.
4 is a perspective view showing a support main according to an embodiment of the present invention;
FIG. 5 is a rear perspective view showing a part of a support main and a plurality of optical sheets and a light guide plate, which are seated on the back side thereof, according to an embodiment of the present invention. FIG.
6 is a perspective view showing a cover bottom according to an embodiment of the present invention;
FIG. 7 is a perspective view showing a part of a cover bottom, a reflecting plate and a light guide plate which are seated thereon according to an embodiment of the present invention. FIG.

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

FIG. 2 is an exploded perspective view schematically showing a liquid crystal display module according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view showing a part of a liquid crystal display module according to an embodiment of the present invention.

2 and 3, the liquid crystal display module 100 includes a liquid crystal panel 110, a backlight unit 120, a support for modulating the liquid crystal panel 110 and the backlight unit 120, A main cover 130, a cover bottom 150, and a top cover 140.

The liquid crystal panel 110 is a part that plays a key role in image display and is composed of a first substrate 112 and a second substrate 114 which are bonded to each other with a liquid crystal layer interposed therebetween.

Although not shown in the drawing, a plurality of gate lines and data lines cross each other on the inner surface of a first substrate 112, which is usually referred to as a lower substrate or an array substrate, on the premise of an active matrix system, pixels are defined, And a thin film transistor (TFT) is provided and connected in a one-to-one correspondence with the transparent pixel electrode formed in each pixel.

On the inner surface of the second substrate 114 called an upper substrate or a color substrate, a color filter of red (R), green (G), and blue (B) And a black matrix for covering non-display elements such as a gate line, a data line, and a thin film transistor.

The first and second polarizers 119a and 119b selectively transmit only specific light to the outer surfaces of the first and second substrates 112 and 114, respectively.

A printed circuit board (not shown) is connected to at least one edge of the liquid crystal panel 110 through a connection member (not shown) such as a flexible circuit board or a tape carrier package (TCP) It can be properly brought into close contact with the side surface of the support main body 130 or the backside of the cover bottom 150 in the modularization process.

When the thin film transistor selected for each gate line is turned on by the on or off signal of the gate driving circuit transmitted through the printed circuit board (not shown), the liquid crystal panel 110 having the above- The signal voltage of the liquid crystal molecules is transmitted to the corresponding pixel electrode through the data line and the alignment direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode.

On the rear surface of the liquid crystal panel 110, a backlight unit 120 is provided to supply light so that the difference in transmittance can be displayed as an image.

The backlight unit 120 includes a light source arranged along the edge of the support main body 130, a reflection plate 125, a light guide plate 123 mounted on the reflection plate 125, and a plurality of optical sheets (121).

An LED 129a is used as a light source. The plurality of LEDs 129a are spaced apart from each other by a predetermined distance and mounted on a printed circuit board (PCB) 129b, thereby forming an LED assembly 129.

Although not shown in the drawing, a fluorescent lamp may be used instead of the LED assembly 129, and a lamp guide for guiding and guiding the outside of the fluorescent lamp when the fluorescent lamp is used and concentrating the light toward the light guide plate 123 .

The LED assembly 129 is fixed in position by adhesion or the like so that light emitted from the plurality of LEDs 129a faces a light-incoming portion of the light guide plate 123. [

The LED assembly 129 may be arranged on one side of the light guide plate 123 as shown in the drawing, but it is not limited thereto and may be arranged on both sides or all sides of the light guide plate 123.

An LED driver integrated circuit (IC) (not shown) for driving each block of the LED assembly 129 is mounted.

The light emitted from the plurality of LEDs 129a of the LED assembly 129 is indirectly supplied to the liquid crystal panel 110 by using the refraction and reflection of the light guide plate 123. [

The reflection plate 125 is disposed on the back surface of the light guide plate 123 and reflects light passing through the back surface of the light guide plate 123 toward the liquid crystal panel 110 to improve the brightness of light.

The light guiding plate 123 uniformly spreads the light incident from each of the plurality of LEDs 129a to the wide area of the light guiding plate 123 while advancing in the light guiding plate 123 by total reflection to provide a surface light source to the liquid crystal panel 110 .

The light guide plate 123 may include a pattern of a specific pattern on the back surface to supply a uniform surface light source. The pattern may be formed in various shapes such as an elliptical pattern, a polygon pattern, a hologram pattern, and the like in order to guide light incident into the light guide plate 123, And may be formed on the lower surface of the base plate 123 by a printing method or an injection method.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the top cover 140, the support main body 130, and the cover bottom 150.

The top cover 140 has a rectangular frame shape bent in a cross section so as to cover the front and side edges of the liquid crystal panel 110 so that the front surface is opened so that an image realized in the liquid crystal panel 110 can be displayed.

The support main body 130 includes a vertical part covering the edge of the liquid crystal panel 110 and a part of the backlight unit 120 and a vertical part extending from the vertical part to the edge of the liquid crystal panel 110 and the edge part of the edge of the backlight unit 120 As shown in FIG.

A plurality of fastening protrusions 210 including a fastening groove 220 are formed along at least one edge of the support main body 130. 3) and the second projection (the right-hand portion of the fastening protrusion 210 of FIG. 3) are spaced apart from each other in cross-sectional area to form the fastening protrusion 210, And the space between the first and second projections becomes the engaging groove 220. [

The cover bottom 150, on which the backlight unit 120 is mounted and serves as a foundation of the entire structure of the LCD module 100, has a rectangular plate shape and includes at least one side thereof formed by vertically bending.

At this time, a plurality of fixing protrusions 300 protruding at a predetermined height are provided on the front surface of the cover bottom 150 corresponding to the plurality of fastening protrusions 210 formed on the support main body 130. That is, the cover bottom 150 includes a bottom surface (bottom surface) and a side surface, and the fixing protrusion 300 is separated from the side surface and protrudes from the bottom surface. At this time, the width of the first protrusion is equal to the distance between the side surface of the cover bottom 150 and the fixing protrusion 300, and the width of the fixing protrusion 300 is equal to the width of the coupling groove 220. Accordingly, the fixing protrusion 300 is inserted into the engaging groove 220, and the first protrusion is inserted into the space between the side surface of the cover bottom 150 and the fixing protrusion 300.

Although a plurality of fixing protrusions 300 are shown along the edge of the rear surface of the cover bottom 150 in the figure, it is also possible to correspond to the plurality of fixing protrusions 210 of the support main body 130, As shown in FIG.

A plurality of optical sheets 121 provided on the support main body 130 are provided on each of the reflection plates 125 placed on the cover bottom 150, the light guide plate 123 positioned on the top thereof, A plurality of through holes 120a corresponding to the fastening protrusions 210 of the base plate 120 are formed.

That is, each of the reflection plates 125, the light guide plate 123 disposed on the light guide plate 123, and the plurality of optical sheets 121 disposed on the upper portion thereof, includes a plurality of through holes 120a, at least one side of which is partially opened.

The plurality of fastening protrusions 210 provided in the support main body 130 passes through the plurality of through holes 120a formed in the plurality of optical sheets 121, the light guide plate 123, and the reflection plate 125, After passing through the plurality of through holes 120a, the plurality of fixing protrusions 300 are coupled with the plurality of fixing protrusions 300 provided in the cover bottom 150. Each of the plurality of fixing grooves 220 included in the plurality of fixing protrusions 210 A plurality of fixing protrusions 300 are inserted to be coupled to each other.

Here, the support main body 130 is provided with a plurality of side reflection members 400 that surround the outer sides of the plurality of fastening protrusions 210, as shown in FIG.

Each of the plurality of side reflection members 400 reflects the light emitted from the side of each of the plurality of through holes 120a formed in at least one side of the light guide plate 123 to the light guide plate 123 to minimize light loss It plays a role. This will be discussed in detail later.

The liquid crystal panel 110 and the backlight unit 120 are formed in a rectangular shape with a top cover 140 covering the top edge of the liquid crystal panel 110 and a backlight unit 120 And the cover bottoms 150 covering the back surface are coupled to each other at the front and rear sides to be integrated through the support main body 130 to be modularized.

A plurality of fixing protrusions 300 provided in the cover bottom 150 are inserted into the plurality of coupling grooves 220 included in the plurality of coupling protrusions 210 of the support main body 130, The light guide plate 123 can be more stably fixed so that the light guide plate 123 is not lifted.

On the other hand, the first pad 160a is provided on at least one edge between the support main 130 and the liquid crystal panel 110, more precisely between the support main 130 and the first polarizer 119a attached to the liquid crystal panel 110, The first pad 160a may include a first polarizer 119a attached to the liquid crystal panel 110 and a first polarizer 119a attached to the liquid crystal panel 110 And prevents the liquid crystal panel 110 from flowing.

The second pad 160b is disposed on at least one edge between the top cover 140 and the liquid crystal panel 110 or more precisely between the top cover 140 and the second polarizer 119b attached to the liquid crystal panel 110. [ The first pad 160b may be positioned between the second polarizer 119b attached to the liquid crystal panel 110 when the top cover 140 is coupled to the front of the liquid crystal panel 110, (110) and prevent the liquid crystal panel (110) from flowing.

The light emitted from each of the plurality of LEDs 129a of the backlight unit 120 is incident on the light incident portion of the light guide plate 123 and is refracted toward the liquid crystal panel 110 from inside thereof, While being passed through the plurality of optical sheets 121 together with the light reflected by the liquid crystal panel 125, the liquid crystal panel 110 is processed into a more uniform high-quality surface light source.

Here, the top cover 140 may be referred to as a case top or a top case, and the support main 130 may be referred to as a guide panel or a main support or a mold frame, and the cover bottom 150 may be referred to as a bottom cover.

Hereinafter, the structure of the support main and cover bottom of the present invention will be described in more detail with reference to the drawings.

FIG. 4 is a rear perspective view showing a back surface of a support main according to a preferred embodiment of the present invention. FIG. 5 is a plan view of a support main in accordance with a preferred embodiment of the present invention and a plurality of optical sheets, Referring to the perspective view, FIGS. 2 and 3 are referred to.

Referring to FIG. 4, a plurality of fastening protrusions 210 including a fastening groove 220 are formed on at least one edge of the support main body 130.

The plurality of fastening protrusions 210 protrude toward the front surface of the cover bottom 150 so as to correspond to the plurality of fastening protrusions 300 formed on the front surface of the cover bottom 150.

Particularly, the plurality of fastening protrusions 210 are formed on at least one edge of the support main body 130 corresponding to the non-display area of the LCD module 100 (FIG. 2) so that the width of the bezel of the liquid crystal display device can be reduced do.

Each of the plurality of fastening recesses 220 included in the plurality of fastening protrusions 210 is formed to have a size and a depth corresponding to each of the plurality of fastening protrusions 300 formed in the cover bottom 150, And is engaged with the fixing protrusion 300.

A plurality of side reflection members 400 are provided on the plurality of fastening protrusions 210 to surround the outer sides of the plurality of fastening protrusions 210. Each of the side reflection members 400 includes a light guide plate 123, The plurality of through holes 120a formed in the at least one side and the plurality of fastening protrusions 210 abutting on the plurality of through holes 120a prevent the light emitted from the side of each of the plurality of through holes 120a from leaking to the outside .

Each of the plurality of side reflection members 400 is configured to surround an outer surface of each of the plurality of fastening protrusions 210, which abuts each of the plurality of through holes 120a.

Here, each of the plurality of side reflection members 400 is configured to emit light from the light guide plate 123 so as to surround an outer side surface of an area larger than an area of each of the plurality of engagement projections 210, So that the light loss of the light guide plate 123 can be minimized. The side reflective member 400 may be in the form of a plate or a sheet.

As shown in FIG. 5, the support main body 130 having the side reflecting member 400, which surrounds a part of the outer surface of each of the plurality of fastening protrusions 210 formed on the support main body 130, The optical sheets 121 and the light guide plate 123 are sequentially positioned.

The support main body 130 including the plurality of fastening protrusions 210 may be formed integrally with a plurality of fastening protrusions 210 by injection molding used for molding a specific shape.

FIG. 6 is a perspective view showing a structure of a cover bottom according to a preferred embodiment of the present invention, FIG. 7 is a rear perspective view showing a part of a cover bottom, a reflecting plate and a light guide plate, See FIG.

6, a plurality of fastening protrusions 210 corresponding to the plurality of fastening protrusions 210 formed on the support main body 130 are formed on the front surface of the cover bottom 150, A plurality of fixing protrusions 300 are provided.

Each of the plurality of fixing protrusions 300 protrudes toward the support main body 130 so as to correspond to a plurality of fixing protrusions 210 formed on at least one edge of the back surface of the support main body 130.

The plurality of fixing protrusions 300 provided on the cover bottom 150 correspond to the positions and the number of the plurality of locking protrusions 210 provided on the support main body 130, And has a shape corresponding to the shape.

For example, each of the plurality of fixing protrusions 300 may have a square pillar shape or a cylindrical shape. If each of the plurality of fixing protrusions 300 has a square pillar shape, a plurality of fixing protrusions 300 The plurality of locking protrusions 300 are formed in a rectangular columnar groove corresponding to a square pillar shape. When the plurality of locking protrusions 300 are cylindrical, the plurality of locking grooves 220, into which the plurality of locking protrusions 300 are inserted, As shown in Fig.

7, the reflection plate 125 and the light guide plate 123 are seated on the cover bottom 150 on which a plurality of fixing protrusions 300 are formed.

Thereafter, a plurality of optical sheets 121 are interposed on the upper part of the light guide plate 123, and the support main 130 is coupled in front of the cover bottom 150. In the cover bottom 150, Each of the fastening protrusions 300 is inserted into each of the plurality of fastening recesses 220 in correspondence with the plurality of fastening protrusions 210 including a plurality of fastening recesses 220 formed in the support main body 130.

Each of the plurality of fixing protrusions 300 formed on the cover bottom 150 includes a backlight unit 120, that is, a reflective plate 125 and a light guide plate 123, and a plurality of optical sheets 121, The support main body 130 is inserted into a plurality of coupling grooves 220 in the plurality of coupling protrusions 210 formed in the support main body 130 to be modularized in the front of the support main body 130, The cover bottom 150 can more firmly fix the backlight unit 120, in particular, the light guide plate 123.

The cover bottom 150 including the plurality of fixing protrusions 300 may be integrally formed with the plurality of fixing protrusions 300 by injection molding used for molding a specific shape.

A plurality of fixing protrusions 300 formed on the cover bottom 150 and a plurality of coupling protrusions 210 formed on the support main 130 securely fix the backlight unit 120, It is possible to prevent a deformation phenomenon in which the light guide plate 123 is deformed due to thermal expansion or other causes, warping warping phenomenon, or excited lifting phenomenon.

The side reflection member 400 surrounding a part of the outer surface of the plurality of coupling protrusions 210 formed on the support main body 130 prevents leakage of light emitted from the light guide plate 123, .

In the meantime, although the edge type method in which the LED assembly is disposed on one side of the light guide plate is described, many LEDs are arranged below the liquid crystal panel in the side type to directly supply light to the liquid crystal panel Direct-type method may be applied. In this case, the light guide plate may be included in an exceptionally direct type backlight unit.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

110: liquid crystal panel 120: backlight unit
121: multiple optical sheets 123: light guide plate
125: Reflector 129: LED assembly
130: support main 210: fastening projection
220: fastening groove 140: top cover
150: cover valve 300: fixing projection
400: Side reflection member

Claims (8)

A liquid crystal panel;
A backlight unit disposed on a rear surface of the liquid crystal panel and including an LED assembly;
A support main body having a rectangular frame shape and including the first to fourth parts, the frame main body having an edge of the liquid crystal panel and the backlight unit;
And a cover bottom engaging with the support main at a back surface of the backlight unit and having a bottom surface and a side surface,
A plurality of fastening protrusions including fastening grooves are formed on a back surface of each of the first to fourth parts of the support main body, the fastening protrusions include first and second protrusions constituting the fastening grooves,
A plurality of fixing protrusions corresponding to the plurality of fastening protrusions and inserted into the plurality of fastening grooves are provided on the bottom surface of the cover bottom,
Wherein a width of the first protrusion formed on the first portion is equal to a distance between a side surface of the cover bottom and the fixing protrusion, And a space between the side surface of the cover bottom and the fixing protrusion is inserted.
The method according to claim 1,
The backlight unit includes:
A light guide plate facing at least one side surface of the LED assembly; and a plurality of optical sheets positioned at an upper portion of the light guide plate,
Wherein the LED assembly corresponds to at least one of the second to fourth parts,
Wherein the light guide plate and the plurality of optical sheets include a plurality of through holes corresponding to the plurality of fastening protrusions.
3. The method according to claim 1 or 2,
And a plurality of side reflective members surrounding each of the plurality of fastening protrusions.
The method of claim 3,
Wherein each of the plurality of side reflection members surrounds an outer side surface of the outer side surface of each of the plurality of fastening protrusions which abuts at least one side of the light guide plate.
3. The method of claim 2,
Wherein each of the plurality of through holes is partially open at a side thereof.
A liquid crystal panel;
A backlight unit disposed on a rear surface of the liquid crystal panel;
A support main body having a rectangular frame shape and including the first to fourth parts, the frame main body having an edge of the liquid crystal panel and the backlight unit;
And a cover bottom engaging with the support main at a back surface of the backlight unit and having a bottom surface and a side surface,
A plurality of fastening protrusions including fastening grooves are formed on a back surface of each of the first to fourth parts of the support main body, the fastening protrusions include first and second protrusions constituting the fastening grooves,
A plurality of fixing protrusions corresponding to the plurality of fastening protrusions and inserted into the plurality of fastening grooves are provided on the bottom surface of the cover bottom,
The width of the first protrusion formed on the first portion of the support main is equal to the distance between the side surface of the cover bottom and the fixing protrusion and the first protrusion is inserted into the space between the side surface of the cover bottom and the fixing protrusion ,
The backlight unit includes:
A light guide plate disposed under the liquid crystal panel;
And an LED positioned between a lower surface of the light guide plate and a bottom surface of the cover bottom,
Wherein the light guide plate includes through holes corresponding to the fastening protrusions.
The method according to claim 6,
The first protrusion is inserted into the space between the side surface of the cover bottom and the fixing protrusion with a width equal to the distance between the side surface of the cover bottom and the fixing protrusion in all of the first to fourth parts of the support main, .
7. The method according to claim 1 or 6,
Wherein the lower surface of the first projection and the lower surface of the second projection are in contact with the bottom surface of the cover bottom.

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