KR101792103B1 - liquid crystal display device - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display, and more particularly, to a liquid crystal display having a lightweight, thin and narrow bezel while preventing the flow of a light guide plate.
A feature of the present invention is to provide a screw fastening area for assembling and fastening the support main and cover bottoms by forming a screw hole in the fixing part provided to prevent the flow of the light guide plate.
As a result, it is possible to prevent the flow of the light guide plate and to remove a separate area for screwing the support main and cover bottoms, thereby reducing the width of the bezel of the liquid crystal display device.
Therefore, it is possible to prevent a problem that the LED of the LED assembly is broken due to the flow of the light guide plate, or the optical characteristics of the liquid crystal display device are changed to deteriorate the image quality. Further, it is possible to eliminate a separate fixing member for fixing the fixing portion to the cover bottom, thereby reducing the process cost.
Further, since the shape of the light guide plate guide and the shape of the first guide groove are formed to correspond to each other, it is possible to prevent cracks from being prevented from being applied to the first guide groove of the light guide plate, have.

Description

[0001] The present invention relates to a liquid crystal display device,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display, and more particularly, to a liquid crystal display having a lightweight, thin and narrow bezel while preventing the flow of 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 having a light source is disposed on the back surface of the liquid crystal panel.

A typical backlight unit is divided into an edge type and a direct type according to the arrangement structure of the lamp. The edge type has a structure in which one or a pair of lamps are disposed on one side of the light guide plate, Two pairs of lamps are disposed on both side portions of the light guide plate, and the direct type lamp has a structure in which several lamps are disposed under the optical sheet.

Here, the edge type is easier to manufacture than the direct type, and is advantageous in that it is thin, light in weight, and low in power consumption as compared with the direct type.

1 is a sectional view of a liquid crystal display device including an edge type backlight unit.

A typical edge type liquid crystal display device includes a liquid crystal panel 10, a backlight unit 20, a support main 30, a cover bottom 50, and a top cover 40.

The liquid crystal panel 10 is constituted by first and second substrates 12 and 14 which are in contact with each other with a liquid crystal layer interposed therebetween, which plays a key role in image display.

A backlight unit 20 is provided behind the liquid crystal panel 10.

The backlight unit 20 includes an LED assembly 29 arranged along the longitudinal direction of at least one side edge of the support main body 30, a white or silver reflective plate 25 seated on the cover bottom 50, 25, and a plurality of optical sheets 21 interposed therebetween.

The LED assembly 29 is formed on one side of the light guide plate 23. The LED assembly 29 includes a plurality of LEDs 29a and an LED PCB 29b on which a plurality of LEDs 29a are mounted. .

The liquid crystal panel 10 and the backlight unit 20 are covered with a top cover 40 covering the upper edge of the liquid crystal panel 10 in a state where the edge is surrounded by the support main 30 having a rectangular frame shape, And the cover bottoms 50 are integrally joined to each other through the support main body 30.

And reference numerals 19a and 19b denote polarizing plates attached to the front and back surfaces of the liquid crystal panel 10 to control the polarization direction of light, respectively.

On the other hand, it is important to fix the LED assembly 29, the light guide plate 23, and the optical sheet 21 of the backlight unit 20 so that they do not flow.

Particularly, when the light guide plate 23 flows due to an external shock or vibration, the LED 29a of the LED assembly 29 is damaged or the optical characteristics of the liquid crystal display device are changed, It is possible to cause.

Recently, a guide groove (not shown) is formed in a part of the edge of the light guide plate 23 in order to solve the above problem, and a guide groove (not shown) is formed in the cover bottom 50 A plurality of bosses (not shown) are formed and a boss (not shown) is inserted into a guide groove (not shown) to prevent the light guide plate 23 from flowing.

At this time, the plurality of bosses are located along the non-display area of the liquid crystal display device.

On the other hand, in recent years, such a liquid crystal display device has been widely used as a portable computer, a desktop computer monitor, and a wall-mounted television, and researches to have a massive weight and volume with a large display area It is actively proceeding.

Accordingly, there has been a proliferation of efforts to provide a lightweight and thin liquid crystal display device by eliminating the top cover to reduce the components constituting the liquid crystal display device.

In recent years, a liquid crystal display device is required to have a narrow bezel which is lightweight and thin, as well as a display area is wide and a bezel area which is a non-display area other than the display area is formed as small as possible.

However, the top cover 30, the support main body 40, and the cover bottom 50, which modularize the liquid crystal panel and the backlight unit, are integrally assembled with each other through the screw 60, There is a limit in reducing the width of the bezel of the liquid crystal display device.

SUMMARY OF THE INVENTION It is a first object of the present invention to provide a lightweight, thin and narrow bezel and prevent the flow of a light guide plate.

Another object of the present invention is to prevent a reduction in process cost and a crack in the light guide plate.

In order to achieve the above-mentioned object, the present invention provides a support structure comprising: a support main body having a vertical portion and a protruding portion inside the vertical portion, the protruding portion having a first screw hole; A liquid crystal panel mounted on the protrusion; An optical sheet positioned under the liquid crystal panel; A light guide plate positioned at a lower portion of the optical sheet and including a first guide groove at an edge excluding a light entrance surface; An LED assembly positioned along the light incidence surface of the light guide plate; A cover bottom which is positioned below the light guide plate and has a second screw hole corresponding to the first screw hole on a horizontal plane; And a fixing portion which is located on the horizontal plane and is inserted into the first guide groove, wherein the fixing portion is provided with a third screw hole corresponding to the first and second screw holes, And the support main, the cover bottom and the fixing part are integrally assembled and fastened by being inserted into the second screw hole through the first and third screw holes from the front of the screw hole.

In this case, the fixing portion is composed of a support portion and a light guide plate guide protruding from the support portion in a smaller size than the support portion, the light guide plate is seated on the support portion, the first guide groove surrounds the outer surface of the light guide guide, Wherein the member is a screw having a shaft and a head at an end of the shaft, the first screw hole of the support main being composed of a first portion into which the shaft is inserted and a second portion into which the head is inserted, Lt; / RTI >

A tab burr is formed on the rear surface of the step, and the other end of the fixing member is connected to the back surface of the cover bottom And a second guide groove corresponding to the first guide groove is formed at an edge of the reflection plate.

In addition, a plurality of driving circuits are mounted in the spacing space between the reflection plate and the horizontal bottom surface of the cover bottom, the edge of the liquid crystal panel is surrounded by the support main, Loses.

As described above, a screw hole is formed in the fixing part provided to prevent the flow of the light guide plate according to the present invention to provide a screw fastening area for assembling and fastening the support main and cover bottoms, It is possible to prevent a flow and to remove a separate area for screwing the support main and cover bottoms, thereby reducing the width of the bezel of the liquid crystal display device.

Therefore, there is an advantageous effect that the LED of the LED assembly is broken by the flow of the light guide plate, or the optical characteristics of the liquid crystal display device are changed and the image quality is lowered. Further, it is possible to eliminate a separate fixing member for fixing the fixing portion to the cover bottom, thereby reducing the process cost.

Further, since the shape of the light guide plate guide and the shape of the first guide groove are formed to correspond to each other, it is possible to prevent cracks from being prevented from being applied to the first guide groove of the light guide plate, There is an effect.

1 is a sectional view of a liquid crystal display device including an edge type backlight unit.
2 is an exploded perspective view schematically illustrating a liquid crystal display device according to an embodiment of the present invention.
FIG. 3A is an exploded perspective view schematically showing a process of assembling and fastening a cover main body and a cover bottom according to an embodiment of the present invention; FIG.
FIG. 3B is an exploded perspective view showing the rear surface of FIG. 3A. FIG.
Fig. 4 is a sectional view schematically showing a part of the modular liquid crystal display of Fig. 2; Fig.

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

2 is an exploded perspective view schematically showing a liquid crystal display device according to an embodiment of the present invention.

The liquid crystal display device includes a liquid crystal panel 110 and a backlight unit 120 and includes a support main body 130 and a cover bottom 150 for modularizing the liquid crystal panel 110 and the backlight unit 120, .

The liquid crystal panel 110 is a part that plays a key role in image display and includes 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 called a lower substrate or an array substrate, pixels are defined, and thin- and a thin film transistor (TFT), which are connected in a one-to-one correspondence with the transparent pixel electrodes formed in the respective pixels.

On the inner surface of the second substrate 114 called an upper substrate or a color filter substrate, color filters of red (R), green (G), and blue (B) And a black matrix for covering the gate lines, the data lines, and the thin film transistors. In addition, color filters of red (R), green (G), and blue (B) colors and transparent common electrodes covering the black matrix are provided.

A polarizing plate (not shown) for selectively transmitting only specific light is attached to the outer surfaces of the first and second substrates 112 and 114, respectively.

A printed circuit board 117 is connected to at least one edge of the liquid crystal panel 110 via a connection member 116 such as a flexible circuit board or a tape carrier package (TCP) The support main body 130 or the cover bottom 150 is properly bent.

When the thin film transistor selected for each gate line is turned on by the on / off signal of the gate driving circuit, the liquid crystal panel 110 transmits the signal voltage of the data driving circuit to the corresponding pixel electrode through the data line. The arrangement direction of the liquid crystal molecules is changed by the electric field between the pixel electrode and the common electrode to show a difference in transmittance.

A backlight unit 120 for supplying light is provided on the back surface of the liquid crystal panel 110 so that the difference in transmittance of the liquid crystal panel 110 is externally expressed.

The backlight unit 120 includes an LED assembly 129, a white or silver reflective plate 125, a light guide plate 123 seated on the reflective plate 125, and an optical sheet 121 interposed therebetween .

The LED assembly 129 is disposed on one side of the light guide plate 123 so as to face the light incident surface of the light guide plate 123 and includes a plurality of LEDs 129a and a PCB 129b ).

At this time, the plurality of LEDs 129a include an LED chip (not shown) that emits all the colors of RGB or emits white light, and emits white light forward toward the light incoming surface of the light guide plate 123.

The plurality of LEDs 129a emit light having colors of red (R), green (G) and blue (B), respectively. By lighting the plurality of RGB LEDs 129a at once, white light It can also be implemented.

The light guide plate 123 through which the light emitted from the plurality of LEDs 129a of the LED assembly 129 is incident is formed so that the light incident from the LED 129a passes through the light guide plate 123, So that the liquid crystal panel 110 is provided with a surface light source.

The light guide plate 123 may include a pattern of a specific pattern on the back surface to supply a uniform surface light source.

Here, 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. The pattern is formed on the lower surface of the light guide plate 123 by a printing method or an injection method.

In particular, the light guide plate 123 of the present invention is characterized in that a plurality of first guide grooves 123a are formed at the edges of the light guide plate 123 excluding the light incidence surface to which the LED assembly 129 is attached.

That is, the light guide plate 123 of the present invention is fixed in the modularized liquid crystal display device through the first guide groove 123a, and when the light guide plate 123 is housed in the cover bottom 150, Thereby preventing the light guide plate 123 from flowing in the horizontal or vertical direction.

Accordingly, it is possible to prevent the plurality of LEDs 129a from being damaged by the flow 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.

At this time, a second guide groove 125a corresponding to the first guide groove 123a of the light guide plate 123 is formed at the edge of the reflection plate 125.

The optical sheet 121 on the light guide plate 123 includes a diffusion sheet and at least one light condensing sheet and diffuses or condenses the light passing through the light guide plate 123 to provide a more uniform surface light source to the liquid crystal panel 110 Let it enter.

The liquid crystal panel 110 and the backlight unit 120 are modularized through the support main 130 and the cover bottom 150. The cover bottom 150 includes a horizontal surface 151 and a horizontal surface 151 which are in close contact with the back surface of the backlight unit 120, And its side edge 153 is vertically bent upward.

The liquid crystal panel 110 and the backlight unit 120 are mounted on the cover bottom 150 and the cover bottom 150 is based on assembly of the whole liquid crystal display apparatus.

The support main 130, which is mounted on the cover bottom 150 and which covers the edge of the liquid crystal panel 110, is coupled with the cover bottom 150.

The support main 130 includes a vertical portion 131 covering the edge of the liquid crystal panel 110 and the protruding portion 133 is provided inside the vertical portion 131. The liquid crystal panel 110 has two sides (Not shown) such as a tape.

The support main 130 and the cover bottom 150 are integrally coupled through a so-called front mounting structure in which the support main 130 and the cover bottom 150 are assembled through the screws 160. That is, The cover main body 130 and the cover main body 150 are inserted into the cover bottom 150 through the support main body 130. For this purpose, First and second screw holes 135 (not shown) in which a female screw thread is formed on the inner circumferential surface.

At this time, the screw 160 includes a shaft 161 and a head 163 provided at the end of the shaft 161, similar to the shape of a general screw. At this time, along the outer surface of the shaft 161, male threads corresponding to the female threads formed on the inner surfaces of the first and second screw holes 135 (not shown) are formed.

The screw 160 is inserted into the second screw hole (not shown) of the cover bottom 150 through the first screw hole 135 of the support main body 130 from the end of the shaft 161, 130 and the cover bottom 150 are integrally joined.

The liquid crystal display according to the embodiment of the present invention has a structure in which a top cover (not shown) is removed. The liquid crystal display can be made light and thin by eliminating a top cover (not shown) Effect.

Further, the elimination of the top cover (not shown) made of a metal material can reduce the process cost.

The light guide plate 123 includes a light guide plate 210 having a light guide plate 210 inserted into the guide groove 123a of the light guide plate 123 on a horizontal surface 151 of the cover bottom 150 corresponding to the guide groove 123a of the light guide plate 123, 200 are formed.

The light guide plate 123 is fixed in position as the light guide plate guide 210 of the fixing portion 200 is inserted into the guide groove 123a of the light guide plate 123. [

Particularly, the fixing unit 200 is characterized in that the support main 130 and the third screw holes 230 corresponding to the first and second screw holes 135 (not shown) of the cover bottom 150 are formed .

That is, in the process of assembling and fastening the support main body 130 and the cover bottom 150 through the screws 160, the screws 160 are inserted into the first through third screw holes 135, The cover main body 130 and the cover main body 130 are integrally joined to each other.

At this time, a female screw thread corresponding to the screw thread of the screw 160 is also formed on the inner circumferential surface of the third screw hole 230.

Therefore, the liquid crystal display of the present invention includes a screw 160 for assembling and fastening the cover main body 130 and the cover bottom 150 through the fixing part 200 provided to prevent the flow of the light guide plate 123, It is possible to eliminate a separate area for fastening the screw 160 in the process of assembling and fastening the support main body 130 and the cover bottom 150 to each other through the screw 160, .

At this time, the support main body 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 or a bottom cover.

The LED 129a of the LED assembly 129 is damaged due to the flow of the light guide plate 123 because the liquid crystal display device described above can prevent the flow of the light guide plate 123 even when an external shock or vibration occurs, It is possible to prevent the problem that the optical characteristics of the liquid crystal display device are changed and the image quality is deteriorated.

A separate area for tightening the screw 160 can be removed during assembly and fastening of the cover main body 130 and the cover bottom 150 through the screw 160, thereby providing a liquid crystal display device having a narrow bezel can do.

FIG. 3A is an exploded perspective view schematically showing a process of assembling and fastening a cover main body and a cover bottom according to an embodiment of the present invention, and FIG. 3B is an exploded perspective view showing the back surface of FIG.

The fixing part 200 is positioned on the horizontal surface 151 close to the side surface 153 of the cover bottom 150 and the fixing part 200 is provided on the support part 150 supporting the reflection plate 125 and the light guide plate 123. [ (220) and a light guide plate guide (210).

The light guiding plate guide 210 of the fixing part 200 protrudes from the supporting part 220 in a smaller size than the supporting part 220. At this time, The reflection plate 125 and the light guide plate 123 are seated and supported on the light guide plate 220.

The reflector 125 is spaced apart from the horizontal surface 151 of the cover bottom 150 by a predetermined distance corresponding to the height of the support 220 and the horizontal surface 151 of the reflector 125 and the cover bottom 150 A plurality of driving circuits (not shown) and the like can be mounted on the spacing space B (see FIG. 4).

Here, the support portion 220 is removable. That is, the light guide plate guide 210 may be formed to include the height of the support portion 210.

The bezel width of the liquid crystal display device which is the non-display area of the liquid crystal display device where the fixing part 200 is located is reduced by making the fixing part 200 as close as possible to the side surface 153 of the cover bottom 150 .

A first guide groove 123a is formed at the edge of the light guide plate 123 to receive the light guide plate guide 210. The first guide groove 123a has a predetermined width and depth from the edge of the light guide plate 123 And is recessed and formed.

That is, the first guide groove 123a of the light guide plate 123 is formed so as to surround the outer surface of the light guide plate guide 210 of the fixing portion 200.

Therefore, when the light guide plate guide 210 of the fixing part 200 is inserted into the first guide groove 123a of the light guide plate 123, the light guide plate 123 is prevented from being deformed by the fixing part 200, The light guide plate 210 is prevented from flowing. Accordingly, damage to the LED (129a in FIG. 2) caused by the flow of the light guide plate 123 does not occur, and the problem that the optical characteristics of the liquid crystal display device are changed and the image quality is deteriorated can be prevented.

In the liquid crystal display of the present invention, the light guide plate 123 can be more stably fixed even when the modularized liquid crystal display device is dropped from a predetermined height and impacted in the process of the mechanical reliability test, Thereby improving the mechanical reliability.

The structure of the light guide plate guide 210 and the first guide groove 123a of the present invention prevents the light guide plate 123 from flowing through bosses (not shown) It is possible to prevent the guide groove 123a from being prevented from cracking.

The guide groove (not shown) formed in the light guide plate 123 has a width corresponding to the diameter of the boss (not shown), and a guide groove (not shown) Is formed to have a longer depth. A boss (not shown) and a guide groove (not shown) having such a structure will cause a boss (not shown) and a guide groove (not shown) to collide when an impact or shaking is applied from the outside. Therefore, a crack is generated in the guide groove (not shown).

The first guide groove 123a of the light guide plate 123 of the present invention is formed so as to surround the outer surface of the light guide plate guide 210 of the fixing portion 200 to prevent the light guide plate 123 210 and the first guide groove 123a correspond to each other.

Therefore, even if an impact or shake is applied from the outside, the liquid crystal display of the present invention does not cause a collision between the light guide plate guide 210 and the first guide groove 123a, so that cracks are generated in the first guide groove 123a .

A second guide groove 125a through which the light guide plate guide 210 of the fixing part 200 is inserted is formed at the edge of the reflection plate 125 corresponding to the first guide groove 123a of the light guide plate 123, The two guide grooves 125a are also recessed from the edge of the reflective plate 125 to have a predetermined width and depth and are formed to surround the outer surface of the light guide plate guide 210. [

At this time, the reflection plate 125 is preferably formed to be wider than the size of the light guide plate 123 in order to reflect light passing through the back surface of the light guide plate 123, which is positioned on the back surface of the light guide plate 123. In this case, the depth and width of the second guide groove 125a are formed to be larger than that of the first guide groove 123a so that the second guide groove 125a of the reflection plate 125 can further cover the LGP guide 210 .

The support main body 130 located above the light guide plate 123 and covering the edge of the liquid crystal panel 110 has a first screw hole 135 formed on the protrusion 133 protruding inward of the vertical part 131 .

Particularly, in the liquid crystal display device of the present invention, the second screw hole 155 is formed on the horizontal surface 151 of the cover bottom 150 at a position corresponding to the first screw hole 135 of the support main body 130, The fixing part 200 is formed with a third screw hole 230 corresponding to the first and second screw holes 135 and 155 through the light guide plate guide 210 and the supporting part 220.

At this time, the first to third screw holes 135, 155, and 230 are formed with inner threads corresponding to the threads of the shaft 161 of the screw 160 on the inner circumferential surface.

The screw 160 penetrates through the first to third screw holes 135, 155 and 230 from the front of the support main body 130 so that the support main body 130, the fixing portion 200, Assembled and fastened together.

That is, in the liquid crystal display device of the present invention, the fixing portion 200 for preventing the flow of the light guide plate 123 is not separately fixed on the cover bottom 150, and the support main 130 and the cover bottom 150 are separately They are assembled and fastened together in one operation without assembly and fastening.

Therefore, the fixing portion 200 provided to prevent the flow of the light guide plate 123 provides an area for fastening the screw 160 of the cover main body 130 and the cover bottom 150. As a result, in the process of assembling and fastening the cover main body 130 and the cover bottom 150, a separate area for fastening the screw 160 can be eliminated, and the width of the bezel of the liquid crystal display device can be reduced.

Further, a separate fixing member (not shown) for fixing the fixing portion 200 to the cover bottom 150 can be omitted, thereby reducing the process cost.

The first screw hole 135 of the support main 130 is screwed into the first portion 135a into which the shaft 161 of the screw 160 is inserted and the head 163 of the screw 160 And a second portion 135b having a larger diameter than the first portion 135a.

Accordingly, the bezel area of the liquid crystal display device can be further reduced.

A portion of the horizontal surface 151 of the cover bottom 150 is formed so as to protrude inwardly to form a step 157 so that the fixing portion 200 is positioned on the step 157 of the cover bottom 150 desirable.

This is because the thickness of the cover bottom 150 is getting thinner in order to realize a light weight and a thin shape so that the screw 160 can be inserted into the cover bottom 150 in the process of assembling and fastening the support main 130 and the cover bottom 150 A tab burr 159 is formed on the back surface of the cover bottom 150 to prevent the tab 159 from protruding from the back surface of the cover bottom 150. [ At this time, it is preferable that the height of the step 157 corresponds to the height of the tab bar 159.

Whereby the liquid crystal display device has a minimum thickness.

FIG. 4 is a cross-sectional view schematically showing a part of the modular liquid crystal display of FIG. 2;

2, the optical sheets 121 are stacked on the light guide plate 123 and the LED assembly (129 of FIG. 2) provided on one side of the light guide plate 123, Thereby forming the backlight unit 120.

A liquid crystal panel 110 in which a liquid crystal layer (not shown) is interposed between the first and second substrates 112 and 114 and the first and second substrates 112 and 114 are disposed on the backlight unit 120, And 114 are attached with polarizing plates 119a and 119b selectively transmitting only specific light.

The liquid crystal panel 110 is surrounded by the vertical portion 131 of the support main body 130 and the liquid crystal panel 110 is supported on the protrusion 133 protruding inward of the vertical portion 131 .

The liquid crystal panel 110 surrounded by the support main body 130 and the backlight unit 120 positioned on the backside of the liquid crystal panel 110 have a horizontal surface 151 inside the side surface 153 of the cover bottom 150, Lt; / RTI >

The fixing portion 200 is positioned on the horizontal surface 151 of the cover bottom 150 so as to be in close contact with the side surface 153 of the cover bottom 150.

At this time, the reflection plate 125 and the light guide plate 123 are seated on the support part 220 of the fixing part 200, and are separated from each other in the spacing space B between the reflection plate 125 and the horizontal surface 151 of the cover bottom 150 A plurality of driving circuits (not shown) and the like can be mounted.

The light guide plate guide 210 of the fixing part 200 is inserted into the first guide groove 123a of the light guide plate 123 and the second guide groove 125a of the reflection plate 125, And its position is fixed.

Therefore, even when an external shock or vibration occurs, the light guide plate 123 is prevented from flowing by the light guide plate guide 210 of the fixing portion 200. [ Accordingly, damage to the LED (129a in FIG. 2) caused by the flow of the light guide plate 123 does not occur, and the problem that the optical characteristics of the liquid crystal display device are changed and the image quality is deteriorated can be prevented.

In the liquid crystal display device of the present invention, the support main body 130, the fixing part 200, and the cover bottom 150 are integrally assembled and fastened through a single screw 160.

That is, in the liquid crystal display of the present invention, the screw 160 penetrates the first screw hole 135 of the support main body 130 and the third screw hole 230 of the fixing part 200, Are inserted into the second screw holes 155, so that they are all assembled and fastened together.

Accordingly, the liquid crystal display of the present invention can eliminate a separate area for fastening the screw 160 in the course of assembling and fastening the support main body 130 and the cover bottom 150, thereby realizing a narrow bezel .

Further, a separate fixing member (not shown) for fixing the fixing portion 200 to the cover bottom 150 can be omitted, thereby reducing the process cost.

At this time, the head 163 of the screw 160 is inserted into the second portion 135b of the first screw hole 135, and the head 163 of the screw 160 is pushed onto the protrusion 133 of the support main 130 Is not exposed, and the width of the bezel of the liquid crystal display device can be further reduced.

The fixing part 200 is located at the step 157 of the cover bottom 150 and the tab bottom 159 is formed on the back side of the cover bottom 150 on which the step 157 is formed, It is possible to prevent the screw 160 from being sharply protruded and to prevent the tab bar 159 from protruding from the back surface of the cover bottom 150.

As described above, the liquid crystal display of the present invention has screw holes 230 formed in the fixing part 200 provided to prevent the flow of the light guide plate 123, and the support main 130 and the cover bottom 150, Thereby preventing the flow of the light guide plate 123 and removing a separate area for fastening the screw 160 of the support main body 130 and the cover bottom 150 to each other And the width of the bezel of the liquid crystal display device can be reduced.

2) of the LED assembly (129 in FIG. 2) due to the flow of the light guide plate 123 can be prevented by preventing the flow of the light guide plate 123 even when an external shock or vibration occurs, Can be damaged, or the optical characteristics of the liquid crystal display device can be changed, thereby lowering the image quality.

Further, a separate fixing member (not shown) for fixing the fixing portion 200 to the cover bottom 150 can be omitted, thereby reducing the process cost.

The light guiding plate guide 210 of the fixing part 200 and the first guide groove 123a of the light guiding plate 123 are formed to correspond to each other to prevent the light guiding plate 123 from flowing through the boss It is possible to prevent the first guide groove 123a of the light guide plate 123 from being cracked as compared with the prior art.

Meanwhile, in the above description, the liquid crystal display device of the present invention has a structure in which the top cover is omitted to realize a light weight and a thin shape, but a liquid crystal display device including a top cover is also applicable. Here, the top cover may be referred to as a case top or a top case.

The backlight unit 120 having the above-described structure is generally called a side light system. Depending on the purpose, a plurality of LEDs (129a in FIG. 2) may be arranged on the PCB (129b in FIG. 2) And a fluorescent lamp may be used in place of the LED assembly (129 in FIG. 2).

When the fluorescent lamp is used, it 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.

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 (112, 114: first and second substrates)
119a, 119b: first and second polarizing plates, 120: backlight unit, 121: optical sheet
123: light guide plate (123a: first guide groove), 125: reflector (125a: second guide groove)
130: support main part (131: vertical part, 133: projecting part, 135: first screw hole)
150: cover bottom 151 (horizontal plane, 153: side surface, 155: second screw hole, 157: step, 159:
160: screw (161: shaft, 163: head)
200: fixing part (210: light guiding plate guide, 220: supporting part, 230: third screw hole)

Claims (7)

A support main body having a vertical portion and a protruding portion inside the vertical portion, the protruding portion having a first screw hole;
A liquid crystal panel mounted on the protrusion;
An optical sheet positioned under the liquid crystal panel;
A light guide plate positioned at a lower portion of the optical sheet and including a first guide groove at an edge excluding a light entrance surface;
An LED assembly positioned along the light incidence surface of the light guide plate;
A cover bottom located on the lower side of the light guide plate and having a second screw hole corresponding to the first screw hole in a horizontal plane;
And a second guide groove, which is located on the horizontal plane,
Wherein the fixing portion is provided with a third screw hole corresponding to the first and second screw holes so that the fixing member penetrates the first and third screw holes from the front of the first screw hole, 2 screw holes so that the support main, the cover bottom and the fixing portion are integrally assembled and fastened,
Wherein the fixing portion is located on a side edge of a portion of the horizontal surface of the cover bottom protruding inwardly and a tab burr is provided on a back side of the edge portion of the cover bottom, Not the liquid crystal display.
The method according to claim 1,
Wherein the fixing portion comprises a support portion and a light guide plate guide protruding from the support portion in a size smaller than the support portion and the light guide plate is seated on the support portion so that the first guide groove surrounds the outer surface of the light guide guide.
The method according to claim 1,
Wherein the fixing member is a screw having a shaft and a head at an end of the shaft, the first screw hole of the support main being composed of a first portion into which the shaft is inserted and a second portion into which the head is inserted, Is not exposed to the outside.
delete 3. The method of claim 2,
Wherein a reflection plate that is seated on the support portion is disposed on a back surface of the light guide plate and a second guide groove corresponding to the first guide groove is provided at an edge of the reflection plate.
6. The method of claim 5,
And a plurality of driving circuits are mounted in a spaced space between the reflection plate and the horizontal surface of the cover bottom.
The method according to claim 1,
Wherein the edge of the liquid crystal panel is surrounded by the support main, and the top edge of the liquid crystal panel is surrounded by the top cover.

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