KR101829857B1 - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device capable of more stably fixing a light guide plate.
A liquid crystal display device according to the present invention includes a liquid crystal panel, a reflection plate, a light guide plate disposed on an upper portion of the reflection plate, a light source disposed along at least one side of the light guide plate, and a plurality of optical sheets interposed on the light guide plate A cover bottom including a bottom portion that is in close contact with a back surface of the backlight unit and a side surface that covers the side surface of the backlight unit; a first engaging portion that covers a front edge of the light guide plate; And a fixing unit for fixing the reflection plate and the light guide plate, the fixing unit including a second coupling unit coupled to the first coupling unit.

Description

[0001] LIQUID CRYSTAL DISPLAY DEVICE [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device capable of more stably fixing a light guide plate.

A liquid crystal display device (LCD), which is advantageous for moving picture display and has a high 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.

1, the liquid crystal display device 1 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 10.

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 a light source (not shown), a reflection plate 25 seated on the cover bottom 50, a light guide plate 23 positioned above the reflection plate 25, And a plurality of optical sheets 21 that are formed on the substrate.

Here, the light guide plate 23 has a plurality of insertion grooves (not shown) for positioning the plurality of fixing pins 80 along the edge thereof.

The light guide plate 23 is manufactured by injection molding used for molding a specific shape.

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.

In this modularization process, a plurality of fixing pins 80 are inserted in the direction toward the liquid crystal panel 10 through a plurality of through holes formed in the cover bottom 50 and a plurality of insertion grooves formed in the light guide plate 23, To prevent the light guide plate 23 from flowing, the plurality of fixing pins 80 are located at the edges of the liquid crystal display device and the non-display area.

However, there is a problem in that light from the light source (not shown) is reflected by the plurality of fixing pins 80 even though the plurality of fixing pins 80 are located in 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 decreases, the number of the fixing pins 80 is positioned closer to the display area, so that the light fringing phenomenon caused by the fixing pins 80 is increased. As a result, There is a problem that the light leakage phenomenon that is leaked is also increased, thereby deteriorating the image quality.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a liquid crystal display device capable of preventing a light incidence phenomenon by applying a light guide plate fixing means of a clip-type mold material capable of fixing the light guide plate more stably.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a liquid crystal panel; A backlight unit including a reflective plate, a light guide plate disposed on an upper portion of the reflective plate, a light source disposed along at least one side of the light guide plate, and a plurality of optical sheets interposed on the upper side of the light guide plate; A cover bottom including a bottom portion that is in close contact with a back surface of the backlight unit and a side surface portion that covers a side surface of the backlight unit; And a fixing unit configured to fix the reflection plate and the light guide plate, the fixing unit including a first coupling unit for covering the front edge of the light guide plate and a second coupling unit for coupling the first coupling unit and the rear edge of the reflection plate. do.

Wherein the first coupling portion comprises a support portion having a predetermined area in a first direction and having a rear surface covering a front edge of the light guide plate and a protruding portion protruding in a second direction from the support portion toward the cover bottom perpendicular to the first direction And the second engaging portion includes a vertical portion having an engaging groove corresponding to the protruding portion of the first engaging portion and a horizontal portion extending from a lower end of the inner surface of the vertical portion.

Here, the protrusions are provided at the center of the support portion and have a trapezoidal first protrusion which becomes narrower toward the end, and second and third protrusions which are respectively provided at the opposite sides of the first protrusion, 3 protrusions.

Each of the second and third protrusions includes a protruding protrusion protruding in a right triangular shape from an outer side end of the protrusion, and the vertical portion of the second fitting portion is inserted into the protrusion at a position corresponding to the protrusion. And a latching groove formed in the latching groove.

Further, the horizontal portion of the second engagement portion is formed in a rear direction from the front side thereof, and has a screw hole for screw engagement.

The screw hole includes a thread groove for receiving a head of the screw, and a thread hole having a second thread corresponding to the first thread formed on the body of the screw.

The horizontal portion of the second engaging portion has a fixing hole formed on both sides of the screw hole. The bottom surface of the cover bottom protrudes from the front surface of the cover bottom toward the liquid crystal panel and is inserted into the fixing hole And a protrusion.

And a member for surrounding each side edge of the light guide plate.

The plurality of optical sheets may be smaller than the size of the light guide plate so that the front edge of the light guide plate is partially exposed.

And a pad made of a silicon material for protecting the light guide plate is further included between the first coupling portion and the front edge of the light guide plate.

As described above, according to the present invention, by applying the light guide plate fixing means for fixing the light guide plate at the edge of the light guide plate, the light guide plate can be more stably fixed to the cover bottom to prevent the light guide plate from flowing, Thereby reducing the width of the display panel.

Accordingly, it is possible to realize a liquid crystal display device having high brightness, high reliability, and narrow width of the bezel.

Further, since the light guide plate can be manufactured through extrusion molding, the manufacturing process and manufacturing cost can be reduced, and the manufacturing cost of the entire liquid crystal display device can be reduced.

1 is a cross-sectional view showing a part of a conventional liquid crystal display device.
BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid crystal display (LCD), and more particularly,
3 is a view showing a part of another cross-section of a liquid crystal display device to which a light guide plate fixing means according to a preferred embodiment of the present invention is applied.
4 is a plan view showing a cover bottom and a light guide plate fixed thereto according to a preferred embodiment of the present invention.
FIG. 5 is a perspective view showing the light guide plate fixing means shown in FIGS. 2 and 3. FIG.

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

FIG. 2 is a cross-sectional view of a part of a liquid crystal display device to which a light guide plate fixing means according to a preferred embodiment of the present invention is applied, FIG. 3 is a cross- FIG. 4 is a plan view showing a cover bottom and a light guide plate fixed thereto according to a preferred embodiment of the present invention. FIG.

2 and 3, the liquid crystal display 100 includes a liquid crystal panel 110, a backlight unit 120, and a support main body 110 for modularizing the liquid crystal panel 110 and the backlight unit 120. [ (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) A black matrix for covering non-display elements such as a gate line, a data line and a thin film transistor, and a transparent common electrode covering the gate lines and the data lines. Here, the transparent common electrode may be formed on the first substrate 112.

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 (129 in FIG. 4) arranged along one inner side surface of the cover bottom 150, a reflection plate 125, a light guide plate 123 positioned above the reflection plate 125, And a plurality of optical sheets 121 interposed therebetween.

As shown in FIG. 4, the LED 129a may be used as the light source 129. When the LED 129a is used, a plurality of LEDs 129a may be spaced apart from each other by a predetermined distance to form a printed circuit board : PCB, 129b), thereby forming the LED assembly 129. [

At this time, the LED assembly (129 in FIG. 4) is protected on the back surface of the LED assembly (129 in FIG. 4), more precisely on the back surface of the printed circuit board (129b in FIG. 4) And a housing (128 of FIG. 4) serving to concentrate light to the light guide plate 123 may be further provided.

This LED assembly (129 in FIG. 4) is fixed to a housing (128 in FIG. 4) located on the inner surface of one side portion 156 of the cover bottom 150 by a method of adhesion or the like and is emitted from the plurality of LEDs 129a So that the light confronts the light-incoming portion of the light guide plate 123.

Although not shown, a fluorescent lamp may be used instead of the LED. When the fluorescent lamp is used, the lamp guide may further include a lamp guide for guiding and guiding the outside of the fluorescent lamp and focusing the light toward the light guide plate 123.

Accordingly, the light emitted from each of the fluorescent lamps (not shown) or the plurality of LEDs 129a is indirectly supplied to the liquid crystal panel 110 by using refraction and reflection at 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 (not shown) through the light guiding plate 123 to the wide area of the light guiding plate 123, .

On the other hand, the light guide plate 123 may include a pattern of a specific pattern on its 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.

In addition, since the light guide plate 123 has a rectangular plate shape having a constant thickness, it can be manufactured by extrusion molding in which a molded article having a predetermined shape is pushed out from a mold. In the case of the extrusion molding, unlike the injection molding for molding a specific shape, it has a certain cross section, which is advantageous in that it is easy to manufacture and has a low production cost.

That is, conventionally, the light guide plate (23 in FIG. 1) has been manufactured through injection molding having a plurality of insertion grooves (not shown) corresponding to a plurality of fixing pins (80 in FIG. 1) 123 are manufactured through extrusion molding, thereby reducing manufacturing process and manufacturing cost. Accordingly, the manufacturing cost of the entire liquid crystal display device can be reduced.

The plurality of optical sheets 121 mounted on the light guide plate 123 diffuses or condenses the light converted into the surface light source by the light guide plate 123 so that a more uniform surface light source is incident on the liquid crystal panel 110.

At this time, the plurality of optical sheets 121 are provided to have a smaller size than the light guide plate 123 so that the front edge of the light guide plate 123 can be exposed as shown in the figure.

The plurality of optical sheets 121 may include a diffusion sheet for diffusing light, a prism sheet for condensing light, and a protective sheet for protecting the prism sheet and serving as an auxiliary for diffusing light.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the top cover 140, the support main 130 and the cover bottom 150. Particularly, in the modularization process, The fixing means 200 is further applied to fix the light guide plate 123 of the backlight unit 120 and the reflection plate 125 positioned on the backside thereof more stably and modularly.

The top cover 140 is formed in a liquid crystal panel 110 with its front surface opened so as to cover a front edge of the liquid crystal panel 110 and a side surface portion of the support main 130, So that an image can be displayed.

The support main 130 has a rectangular shape and divides the liquid crystal panel 110 and the backlight unit 120 while supporting the back edge of the liquid crystal panel 110. The support main 130 has a cover bottom 150 on which the backlight unit 120 is mounted, And the edge of the liquid crystal panel 110.

The cover bottom 150 which is the base of the whole structure of the liquid crystal display device 100 with the backlight unit 120 mounted thereon is composed of a rectangular bottom part 152 and four sides of the bottom part 152 And a side surface portion 156 formed by bending. Here, the LED assembly (129 in FIG. 4) is disposed along at least one inner side surface of the side surface portion 156.

The plurality of protrusions 153 protrude from the front surface of the bottom portion 152 in a direction toward the liquid crystal panel 110. The plurality of protrusions 153 protrude from the first light guide plate fixing means 200 To the cover bottom 150, as shown in FIG. A plurality of through holes 154 are further formed in the bottom 152 so that the first light guide plate fixing means 200 is fixed to the cover bottom 150 through the screws 180 It plays a role.

The first light guide plate fixing means 200 includes a first coupling portion 210 covering the front edge of the light guide plate 123 partially exposed to the ends of the plurality of optical sheets 121, And a second engaging part 230 coupled to the first engaging part 230. The second engaging part 230 includes a fixing hole 238 for inserting the protrusion 153 of the cover bottom 150 and a screw hole 237 for screw tightening. This will be described in detail later.

The first pad 160 may be positioned between the first coupling portion 210 of the first light guide plate fixing means 200 and the light guide plate 123. The first pad 160 may be disposed between the first light guide plate fixing means 200, The light guide plate 123 is prevented from being scratched during the process of fixing the light guide plate 123 through the light guide plate 200 and the frictional force is increased to prevent the light guide plate 123 from flowing.

The first pad 160 may be made of a silicon material and may be formed of opaque color to prevent a light leakage phenomenon in which light leaks to a non-display region other than the display region.

The light guide plate 123 and the reflection plate 125 are positioned and fixed between the first coupling portion 210 and the second coupling portion 230 of the first light guide plate fixing means 200 to fix the light guide plate 123 and the reflection plate 1225, Is prevented.

4, each of the four corners of the light guide plate 123 may be provided with a second light guide plate fixing means 250. The second light guide plate fixing means 250 includes a side face 156 And the side surfaces of the light guide plate 123 to prevent the light guide plate 123 from moving in the lateral left and right directions.

The second light guide plate fixing means 250 has a curved shape corresponding to the corner.

The liquid crystal panel 110 and the backlight unit 120 are surrounded by a support main body 130 having a rectangular rim and a top cover 140 covering the top edge of the liquid crystal panel 110 And a cover bottom 150 on which the first light guide plate fixing means 200 for fixing the light guide plate 123 of the backlight unit 120 and the reflection plate 125 are mounted are coupled to the front and rear sides respectively, Integrated and modularized. At this time, the second light guide plate fixing means 250 is modularized in the space between the side face 156 of the cover bottom 150 and the corner of the side face of the light guide plate 123, respectively.

The first light guide plate fixing means 200 prevents the light guide plate 123 from moving in the upward direction toward the liquid crystal panel 110, the downward direction toward the cover bottom 150, and the left and right direction, The light guide plate fixing means 250 protects the light guide plate 123 and prevents the light guide plate 123 from moving in the left and right direction.

At least one edge between the support main 130 and the liquid crystal panel 110 or more precisely between the horizontal portion 132 of the support main 130 and the first polarizer 119a attached to the liquid crystal panel 110 The second pad 170a may be positioned.

The second pad 170a protects the first polarizing plate 119a attached to the liquid crystal panel 110 and the liquid crystal panel 110 in the course of modularizing the liquid crystal panel 110 and the backlight unit 120, Thereby preventing the panel 110 from flowing.

The third pad 170b is provided on at least one edge between the top cover 140 and the liquid crystal panel 110, more precisely between the top cover 140 and the second polarizer 119b attached to the liquid crystal panel 110, Lt; / RTI >

The third pad 170b protects the second polarizer 119b attached to the liquid crystal panel 110 and the liquid crystal panel 110 when the top cover 140 is coupled to the front of the liquid crystal panel 110 , Thereby preventing the liquid crystal panel 110 from flowing.

The light emitted from the light source (not shown) of the backlight unit 120 is incident on the light incident surface of the light guide plate 123 and then refracted toward the liquid crystal panel 110, And is supplied to the liquid crystal panel 110 while being processed into a more uniform high-quality surface light source while passing through the plurality of optical sheets 121 together with the light reflected by the plurality of optical sheets 121. [

Meanwhile, 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.

Fig. 5 is a perspective view showing the light guide plate fixing means shown in Figs. 2 and 3, and will be described with reference to Figs. 2 to 4. Fig.

As shown in FIG. 5, the first light guide plate fixing means 200 includes a first coupling portion 210 and a second coupling portion 230 which is coupled to the first coupling portion 210 and is located below the first coupling portion 210.

2 and 3) perpendicular to the transverse direction from the support portion 212 (see FIGS. 2 and 3) of the cover bottom (150 in FIGS. 2 and 3) And a protruding portion 216 protruding downward toward 152 of FIG.

2 and 3) of the support main (130 of Figs. 2 and 3), and a part of the back surface of the support portion 212 is connected to the light guide plate (123 of Figs. 2 and 3 As shown in Fig.

The protrusions 216 are formed of first to third protrusions 213, 214, and 215 formed along the longitudinal direction of the support portion 212. The protrusions 216 are spaced apart from each other by a predetermined distance.

The first protrusion 213 is provided at the center of the support portion 212 and has a trapezoidal shape with a narrow width toward the end.

Each of the second and third protrusions 214 and 215 is provided on both sides of the first protrusion 213 and includes a locking protrusion 214a (not shown) protruding in a right triangle shape from the outer side end do.

The first coupling part 210 having such a configuration places the light guide plate 123 on the front surface of the light guide plate 123 to prevent the light guide plate 123 from flowing.

The second engaging part 230 includes a vertical part 232 having an engaging groove 233 corresponding to the protrusion 216 of the first engaging part 210 and a vertical part 232 extending from the lower end of the inner side of the vertical part 232 And a horizontal portion 236.

The vertical part 232 has a coupling groove 233 for the insertion of the protrusion 216 of the first coupling part 210. The coupling groove 233 is formed on both sides of the longitudinal side And an engagement groove 234 into which the engagement protrusions 214a (not shown) of the second and third protrusions 214 and 215 of the first engagement portion 210 are inserted.

Each of the second and third protrusions 214 and 215 is bent toward the first protrusion 213 when inserted into the coupling groove 233 and inserted into the coupling groove 233, And is inserted into the groove 234 and returned to its original state.

The horizontal portion 236 includes a screw hole 237 formed in a direction from the front face to the back face thereof and a fixing hole 238 on both sides thereof.

3, a screw groove 237a for receiving the head of the screw 180 so that the screw 180 can be assembled from the front side to the back side as shown in FIG. 3, And a screw hole 237c formed with a second screw thread 237b corresponding to the first screw thread formed on the body. The thread 180 is inserted into the thread groove 237a of the screw hole 237 from the front side to the back side and then the thread hole 237c and the through hole 154 formed in the bottom portion 152 of the cover bottom 150 So that the first light guide plate fixing means 200 can be securely fixed to the cover bottom 150.

The fixing holes 238 formed at both sides of the screw holes 237 are inserted into the projections 153 formed on the bottom portion 152 of the cover bottom 150 as shown in FIG. 1 light guide plate fixing means 200 to the cover bottom 150.

That is, the first light guide plate fixing means 200 is fixed to the cover bottom (150 of FIG. 2) through the fixing hole 238, and the second light guide plate fixing means 200 is reliably and secondarily secured through the screw hole 237. [ The first light guide plate fixing means 200 can be fixed to the cover bottom 150 more stably by fixing the first light guide plate 150 to the cover bottom (150 of FIG. 3).

The backlight unit 120 of FIGS. 2 and 3 is mounted on the second coupling portion 230 having such a configuration. More specifically, the backlight unit 120 is mounted on the horizontal portion 236 of the second coupling portion 230 2 and 3), and a plurality of optical sheets (121 in Figs. 2 and 3) are seated, and their edges are covered by the vertical portions 232. [

Meanwhile, the second light guide plate fixing means 250 shown in FIG. 4 is provided in the shape of 'B' so as to surround each side edge of the light guide plate 123 (FIG. 4).

The second light guide plate fixing means 250 of FIG. 4 fills the space between the side surface of the light guide plate 123 (FIG. 4) and the edge of the cover bottom (150 of FIG. 4) 123 to prevent lateral movement.

2 and 3) of the first light guide plate fixing means 200 as described above may include a backlight unit (see FIGS. 2 and 3) positioned between the first and second couplers 210 and 230, 2) and the second light guide plate fixing means (250 of FIG. 4) are prevented from being moved in the left and right directions together with the vertical flow of the light guide plate (123 of FIGS. 2 and 3) (123 in FIG. 4) is prevented from external impact and the light guide plate (123 in FIG. 4) is more reliably prevented from flowing in the lateral direction, so that the light guide plate 123 in FIG. 4 can be more stably fixed.

As described above, by applying the light guide plate fixing means according to the present invention, the light guide plate can be manufactured through extrusion molding. This reduces manufacturing process and manufacturing costs.

Further, since the light guide plate fixing means is located on the outermost edge side of the light guide plate, the light guide plate can be more stably fixed while reducing the width of the bezel. Also, since the light guide plate is fixed around the front surface of the light guide plate and the rear edge of the reflection plate, light and light leakage due to the light guide plate fixing means can be prevented.

The embodiments of the present invention as described above are merely illustrative, and those skilled in the art can make modifications without departing from the gist of the present invention. Accordingly, the protection scope of the present invention includes modifications of the present invention within the scope of the appended claims and equivalents thereof.

110: liquid crystal panel 120: backlight unit
129: LED assembly (129a: LED, 129b: printed circuit board)
128: Housing 125: Reflector
123: light guide plate 121: multiple optical sheets
200: first light guide plate fixing means
210: first engaging portion (212: supporting portion, 216: projecting portion, 214a: engaging jaw)
233: engagement groove, 234: latching groove, 236: horizontal portion, 237: screw hole, 238: fixing hole)
250: second light guide plate fixing means

Claims (12)

A liquid crystal panel;
A backlight unit including a reflective plate, a light guide plate disposed on an upper portion of the reflective plate, a light source disposed along at least one side of the light guide plate, and a plurality of optical sheets interposed on the upper side of the light guide plate;
A cover bottom including a bottom portion that is in close contact with a back surface of the backlight unit and a side surface portion that covers a side surface of the backlight unit;
A first engaging portion for covering a front edge of the light guide plate, and a second engaging portion for engaging with the first engaging portion,
/ RTI >
Wherein the reflection plate and the light guide plate are inserted and fixed between the first and second coupling parts,
And the second engaging portion is coupled to the cover bottom, so that the fixing means is fixed to the cover bottom.
The method according to claim 1,
The first coupling portion
A support portion having a predetermined area in a first direction and having a rear surface covering a front edge of the light guide plate and a protruding portion protruding from the support portion in a second direction toward the cover bottom perpendicular to the first direction,
The second coupling portion
A vertical part having an engaging groove corresponding to the protrusion of the first engaging part, and a horizontal part extending from a lower end of the inner side of the vertical part.
3. The method of claim 2,
The protrusion
A first projecting portion provided at the center of the support portion and having a trapezoidal shape with a width becoming narrower toward an end thereof, and second and third projecting portions provided on the opposite sides of the first projecting portion, Liquid crystal display device.
The method of claim 3,
Each of the second and third protrusions
And a latching protrusion protruding in a right-angled triangle from the outer side end of the latching protrusion,
The vertical portion of the second engagement portion
And a latching groove into which the latching jaw can be inserted at a position corresponding to the latching jaw.
3. The method of claim 2,
The horizontal portion of the second engagement portion
And a screw hole formed in a direction from the front side to the back side thereof for screw tightening.
6. The method of claim 5,
The screw hole
And a screw hole in which a head of the screw is seated and a screw hole in which a second screw thread corresponding to a first screw thread formed on the screw body is formed.
6. The method of claim 5,
The horizontal portion of the second engagement portion
And fixing holes formed on both sides of the screw hole,
The bottom surface of the cover bottom
And a protrusion protruding in a direction toward the liquid crystal panel from a front surface thereof and inserted into the fixing hole.
The method according to claim 1,
And a member surrounding each side edge of the light guide plate.
The method according to claim 1,
The plurality of optical sheets
Wherein the light guide plate has a size smaller than a size of the light guide plate to partially expose a front edge of the light guide plate.
The method according to claim 1,
Between the first engaging portion and the front edge of the light guide plate
And a pad made of a silicon material for protecting the light guide plate. 3. The method of claim 2,
Further comprising a support main body which surrounds the edges of the liquid crystal panel and the cover bottom,
The front surface of the support portion of the first engagement portion is in close contact with the back surface of the horizontal portion of the support main,
Wherein a part of the back surface of the support portion of the first coupling portion is in close contact with the front edge of the light guide plate.
3. The method of claim 2,
The reflection plate and the light guide plate are seated on the horizontal portion of the second engagement portion,
And the vertical portion of the second coupling portion covers an edge of the reflection plate and the light guide plate.

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