KR20140076290A - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display, and more particularly to a liquid crystal display capable of preventing a guide panel from moving. The present invention has features in that a cover bottom and a guide panel are assembled and coupled together through a hook-type coupling scheme, and a fixing member such as a screw (not shown) is not used, thereby realizing the liquid crystal display having a narrow bezel. Accordingly, the process costs can be saved, and the process efficiency can be improved. In particular, in the liquid crystal display according to the present invention, a locking part is provided on the cover bottom, and a coupling part is formed in the guide panel corresponding to the locking part, thereby preventing a light guide plate from moving. In addition, even if the guide panel is contracted or expanded due to the characteristic of a material of the guide panel, the guide panel can be prevented from moving. Therefore, image quality can be prevented from being degraded as a plurality of light emitting devices (LED) of an LED assembly are broken or the optical characteristic of the liquid crystal display is changed.

Description

[0001] Liquid crystal display device [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device capable of preventing a guide panel from flowing.

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.

The backlight unit uses a cold cathode fluorescent lamp (CCFL), an external electrode fluorescent lamp, and a light emitting diode (LED) as a light source.

In particular, LEDs are widely used as light sources for displays, having characteristics such as small size, low power consumption, and high reliability.

Meanwhile, the general backlight unit is divided into a direct type and an edge type depending on the arrangement of the lamps. In the edge type, one or a pair of light sources is divided into one side of the light guide plate and two or two pairs The light source has a structure in which the light sources are disposed on both side portions of the light guide plate, and the direct light type structure has a structure in which several light sources are disposed under the liquid crystal panel.

Here, the direct type type is mainly used in a liquid crystal display device in which brightness is more important than thickness in view of thinness, and an edge type in which a light weight and thin type can be compared with a direct type type is used for a notebook PC or a monitor PC And is mainly used in a liquid crystal display device in which thickness is important.

1 is a cross-sectional view of a liquid crystal display including a backlight unit of a general edge type using an LED as a light source.

As shown in the figure, a liquid crystal display device including a backlight unit 20 of a general edge type includes a liquid crystal panel 10, a backlight unit 20, a guide panel 30, a cover bottom 50, 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.

The 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 edge of the guide panel 30 and composed of a PCB 29b on which a plurality of LEDs 29a and LEDs 29a are mounted, A reflector 25 of white or silver color resting on the bottoms 50 and a light guide plate 23 resting on the reflector 25 and an optical sheet 21 located thereon.

The liquid crystal panel 10 and the backlight unit 20 are covered with a top cover 40 covering the top edge of the liquid crystal panel 10 with the edges thereof being surrounded by a rectangular guide panel 30, The cover bottoms 50 are integrally joined to each other through the guide panel 30.

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

In the liquid crystal display device, the guide panel 30 and the cover bottom 50 are fastened to each other through a fixing member (not shown) such as a screw. By using such a screw (not shown) It is difficult to realize a lightweight, thin and narrow bezel liquid crystal display device which is recently required when the cover bottom 50 is fastened.

Further, the image quality of the liquid crystal panel 10 may be deteriorated due to a foreign substance generated when the screw (not shown) is fastened, and the process cost due to an increase in the number of parts due to the screw (not shown) , The time for fastening the screw (not shown) and the worker's process inconvenience.

Accordingly, in recent years, the guide panel 30 and the cover bottom 50 are fastened through a hook-type fastening system without using a fixing member such as a screw (not shown) There is a problem in that the flow due to contraction and expansion due to the material characteristics of the guide panel 30 can not be prevented.

The flow of the guide panel 30 causes the flow of the light guide plate 23 to cause breakage of the LEDs 29a of the LED assembly 29 or the optical characteristics of the liquid crystal display device, Resulting in a problem of deterioration.

SUMMARY OF THE INVENTION It is a first object of the present invention to provide a liquid crystal display device having a lightweight, thin and narrow bezel.

A second object of the present invention is to prevent the flow of the guide panel from occurring. It is a third object of the present invention to prevent the flow of the light guide plate through the guide panel.

The third object of the present invention is to improve the brightness and image quality of the liquid crystal display device.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a liquid crystal panel; A backlight unit positioned on a rear surface of the liquid crystal panel; A cover bolt on which the backlight unit is mounted, a cover protrusion provided on an outer side surface of the side surface, and a latching portion provided on an inner side of the side surface; A first vertical part having a fastening hole through which the fastening protrusion is inserted and which has an edge of the backlight unit inserted therein, a horizontal part vertically bent from the first vertical part to support the liquid crystal panel, And a guide panel having a fastening part.

At this time, the fastening portion includes first and second side portions bent perpendicularly from the horizontal portion and facing the first vertical portion and parallel to each other at both ends in the longitudinal direction of the second vertical portion And the first and second side surfaces are spaced apart from the first vertical portion by a predetermined distance.

The engaging portion is inserted into the space defined by the first and second vertical portions and the first and second side surfaces, and the engaging portion includes a first jaw perpendicular to the inside from the side surface, The outer surface of the side surface is in close contact with the inner surface of the first vertical portion and the second jaw is in close contact with the inner surface of the second vertical portion.

The backlight unit includes a light guide plate having a guide groove at an edge thereof, and the fastening portion is inserted into the guide groove, and the guide groove is in close contact with the outer surface of the second vertical portion.

The width between the first and second side surfaces corresponds to the width of the engagement portion, and the width between the first vertical portion and the second vertical portion corresponds to the width of the first jaw of the engagement portion.

At this time, the backlight unit includes an LED assembly and an optical sheet.

As described above, since the cover bottom and the guide panel are assembled and fastened through the hook-type fastening method according to the present invention, a liquid crystal display device having a narrow bezel can be realized by not using a fixing member such as a screw .

As a result, it is possible to prevent an increase in the material cost due to the consumption of the fixing member such as a screw, and to prevent the deterioration of the image quality of the liquid crystal panel due to the foreign substances generated when fixing the fixing member such as a screw, It is possible to minimize the time, cost, and waste of manpower in modularizing the apparatus.

Particularly, the liquid crystal display device of the present invention can prevent the flow of the light guide plate by forming the fastening portion corresponding to the fastening portion on the guide panel, and the shrinkage and expansion of the guide panel can be prevented The flow of the guide panel can be prevented.

Accordingly, it is possible to prevent the flow of the light guide plate due to the flow of the guide panel from occurring, thereby causing damage to a plurality of LEDs of the LED assembly, There is an effect that it is possible to prevent occurrence of a problem that the

1 is a cross-sectional view of a liquid crystal display including a backlight unit of a general edge type using an LED as a light source.
2 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention.
FIG. 3A is a rear perspective view schematically showing a guide panel according to an embodiment of the present invention. FIG.
FIG. 3B is an enlarged view of FIG. 3A; FIG.
4A is a perspective view schematically showing a cover bottom according to an embodiment of the present invention.
4B is an enlarged view of B in Fig. 4A. Fig.
4C is a cross-sectional view schematically showing a cross section of the engagement portion of the cover bottom.
5A to 5E are exploded perspective views schematically showing a fastening state of the guide panel and the cover bottom.
6A to 6B are a perspective view and a front view schematically showing a fastened state of the guide panel and the cover bottom.

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

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

As shown in the figure, the liquid crystal display according to the present invention includes a liquid crystal panel 110 and a backlight unit 120 which are stacked on top and bottom, and a guide panel 130 and a cover bottom 150 as mechanical elements for integrating the liquid crystal panel 110 and the backlight unit 120, Respectively.

For the sake of convenience, the backlight unit 120 is disposed behind the liquid crystal panel 110 under the assumption that the display surface of the liquid crystal panel 110 faces forward, A cover bottom 150 which is in close contact with the back surface of the backlight unit 120 in a state where the guide panel 130 of a rectangular shape is wiped is combined at the front and rear sides to be integrated.

Let's take a closer look at each of these.

First, the liquid crystal panel 110 plays a key role in image display of a liquid crystal display device. The liquid crystal panel 110 includes a first substrate 112 and a second substrate 114 which are bonded to each other and a liquid crystal layer (Not shown).

Although not shown in the drawing, a plurality of gate lines and data lines intersect 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 the liquid crystal panel 110 via a connection member 116 such as a flexible circuit board or a tape carrier package (TCP) along one edge of the liquid crystal panel 110, And is brought into close contact with the side surface of the panel or the back surface of the cover bottom 150 with proper inclination.

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 alignment direction of the liquid crystal molecules in the liquid crystal layer is changed by the electric field between the pixel electrode and the common electrode to show a difference in transmittance.

And a backlight unit 120 for supplying light to 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 a white or silver reflective plate 125, an LED assembly 129 arranged along one longitudinal edge of the reflective plate 125, a light guide plate 123 mounted on the reflective plate 125, And an optical sheet 121 which is seated on the optical sheet 121.

The LED assembly 129 is a light source of the backlight unit 120 and is disposed at one side of the light guide plate 123 to face the light incident surface of the light guide plate 123. The LED assembly 129 includes a plurality of LEDs 129a, And a PCB 129b on which a plurality of LEDs 129a are mounted with a predetermined spacing.

The plurality of LEDs 129a emit light having colors of red (R), green (G), and blue (B) toward the front of the light guide plate 123, and the plurality of RGB LEDs 129a ) Can be turned on at once to realize white light by color mixing.

In particular, in recent years, a blue LED 129a including a blue LED chip having excellent luminous efficiency and brightness has been used for improving the luminous efficiency and brightness, and a phosphor such as yttrium aluminum garnet (YAG: Ce) doped with cerium, A blue LED 129a made of a yellow phosphor is used.

The blue light emitted from the LED 129a is mixed with the yellow light transmitted through the phosphor and emitted by the fluorescent material, thereby realizing white light.

The light guiding plate 123 through which the light emitted from the plurality of LEDs 129a is incident is formed such that the light incident from the LED 129a travels in the light guiding plate 123 by total reflection several times, And provides a surface light source to the liquid crystal panel 110.

The light guide plate 123 is excellent in transparency, weatherability, and colorability, and induces light diffusion when light is transmitted.

The light guide plate 123 is made of one selected from a plastic material such as polymethylmethacrylate (PMMA) or polycarbonate (PC), which is an acrylic transparent resin, which is one of transparent materials capable of transmitting light PMMA is widely used because it has excellent transparency, weatherability and colorability and induces light diffusion when light is transmitted.

The light guide plate 123 may include a pattern of a specific shape 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. The pattern is formed on the lower surface of the light guide plate 123 by a printing method or an injection method.

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 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 guide panel 130 and the cover bottom 150. The cover bottom 150 is formed by mounting the backlight unit 120 including the liquid crystal panel 110 The horizontal plane 151 serves as a lower frame that supports the entire liquid crystal display and minimizes the occurrence of light loss. The edge of the horizontal plane 151 is vertically bent to form a side surface 153.

A rectangular guide panel 130 mounted on the cover bottom 150 and covering the edge of the backlight unit 120 is coupled with the cover bottom 150.

The guide panel 130 separates the positions of the liquid crystal panel 110 and the backlight unit 120 from the inside of the first vertical part 131 and the first vertical part 131 surrounding the side surface of the backlight unit 120 And the liquid crystal panel 110 is attached and fixed on the horizontal portion 133 through a bonding pad (not shown) such as a double-sided tape.

Accordingly, the liquid crystal panel 110 and the backlight unit 120 are integrally modularized.

The liquid crystal display of the present invention realizes a light bead and a thin shape, and also realizes a narrow bezel in which 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 .

At this time, the cover bottom 150 serves to prevent the module liquid crystal display from shaking and stably maintain the fixed state. To this end, the outer surface of the four sides 153 of the cover bottom 150 has a plurality of fastening And protrusions 155 are protruded.

At this time, it is preferable that at least two fastening protrusions 155 are provided along the longitudinal direction of the side surface 153 of the cover bottom 150.

A fastening protrusion 155 formed on the outer surface of the four side surfaces 153 of the cover bottom 150 is inserted into the fastening hole 135 to be inserted into the first vertical portion 131 of the guide panel 130 .

Therefore, the guide panel 130 and the cover bottom 150 are assembled and fastened to each other.

3A) for preventing the flow of the light guide plate 123 and assembled with the cover bottom 150 is provided at the inside of the guide panel 130. The fastening part 210 The latching portion 220 is provided on the inner side of the cover bottom 150. [

Therefore, it is possible to prevent the flow of the light guide plate 123 and to prevent the guide panel 130 from flowing due to the contraction and expansion of the guide panel 130.

This also prevents the flow of the light guide plate 123 due to the flow of the guide panel 130. This may cause breakage of the LEDs 129a of the LED assembly 129, It is possible to prevent a problem that the quality of the image is deteriorated due to the change of the image quality.

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

The liquid crystal display according to the embodiment of the present invention has a structure in which the top cover (40 in FIG. 1) is removed, and a lightweight, thin and narrow bezel is possible through the elimination of the top cover And has the effect of simplifying the process.

Further, the elimination of the top cover (40 in Fig. 1) made of a metal material can reduce the process cost.

The liquid crystal display according to the embodiment of the present invention may include a coupling part 210 that can prevent the flow of the light guide plate 123 and prevent the flow of the guide panel 130 to the guide panel 130 It is possible to prevent the flow of the light guide plate 123 and to prevent the shrinkage and shrinkage of the light guide plate 123 due to the material properties of the guide panel 130. Further, It is possible to prevent the guide panel 130 from flowing even when expansion occurs.

This can prevent the flow of the light guide plate 123 due to the flow of the guide panel 130. This prevents breakage of the LEDs 129a of the LED assembly 129, It is possible to prevent the problem that the optical characteristics of the apparatus are changed and the image quality is lowered.

FIG. 3A is a rear perspective view schematically showing a guide panel according to an embodiment of the present invention, and FIG. 3B is an enlarged view of FIG. 3A.

2, the guide panel 130 covering the edge of the backlight unit 120 (see FIG. 2) is made of a molding material made of a synthetic resin such as polycarbonate, and covers the edge of the backlight unit 120 And a horizontal portion 133 protruding inwardly from the first vertical portion 131 and the first vertical portion 131 inward and on which the liquid crystal panel (110 of FIG. 2) is seated.

The guide panel 130 includes a first edge portion 130a, a second edge portion 130b, a third edge portion 130c, and a third edge portion 130d. The guide panel 130 has a rectangular shape and is formed through a synthetic resin through an injection molding process. The first to fourth edge portions 130a, 130b, 130c and 130d are perpendicular to the first vertical portion 131 and the first vertical portion 131 which surround the edge of the backlight unit 120 And a horizontal portion 133 for separating the positions of the backlight unit (120 in FIG. 2) and the liquid crystal panel (110 in FIG. 2).

Therefore, the guide panel 130 has a rectangular frame shape whose cross section is bent in the "a" shape.

At this time, the liquid crystal panel (110 of FIG. 2) is seated and supported on the horizontal portion 133.

That is, a backlight unit (not shown) including a reflection plate (125 in FIG. 2) and a light guide plate (123 in FIG. 2), an optical sheet (121 in FIG. 2), and an LED assembly (120 in FIG. 2) is mounted, and the edge of the first vertical portion 131 is surrounded by the first vertical portion 131.

2) of the liquid crystal panel (110 of FIG. 2) is positioned above the horizontal portion 133 that is vertically bent from the first vertical portion 131, So that its position is fixed.

The first vertical portion 131 is formed with a fastening hole 135 for assembly and fastening with the cover bottom (150 in FIG. 2).

The guide panel 130 of the present invention further includes a fastening part 210 at a lower part of the horizontal part 133. The fastening part 210 has a horizontal part 133 and a vertical part 133, And a second vertical part 211 formed to face the first vertical part 131 and first and second side surfaces 213a and 213b parallel to each other at both ends in the longitudinal direction of the second vertical part 211, 213b.

Accordingly, the coupling part 210 of the guide panel 130 defines a predetermined space inward through the first and second vertical parts 131 and 211 and the first and second side surfaces 213a and 213b.

2) of the cover bottom (150 in FIG. 2) is inserted into a predetermined space defined by the coupling part 210, shrinkage and expansion occur due to the material characteristics of the guide panel 130 The flow of the guide panel 130 can be prevented. Let me take a closer look at this later.

At this time, the light guide plate (123 in FIG. 2) is guided through the outer side of the fastening portion 210, i.e., the second vertical portion 211 and the outer sides of the first and second side surfaces 213a and 213b, 123).

2) 123a is formed at the edge of the light guide plate 123 (see FIG. 2) corresponding to the fastening part 210. The fastening part 210 is inserted into the guide groove (123a in FIG. 2) (123 in Fig. 2) is fixed in its position. Therefore, the position of the light guide plate 123 (see FIG. 2) is fixed in the modularized liquid crystal display device, and the light guide plate 123 of FIG. 2 is guided by the guide panel 130, Thereby preventing the light guide plate 123 (Fig. 2) from flowing in the horizontal or vertical direction.

Accordingly, it is possible to prevent a large number of LEDs (129a in FIG. 2) from being broken due to the flow of the light guide plate (123 in FIG. 2), and the problem that the optical characteristics of the liquid crystal display device are changed, .

At this time, since the first and second side surfaces 213a and 213b are spaced apart from the first vertical portion 131 by a predetermined distance d, the coupling portion 210 is formed by a spring in the X- The same elastic restoring force is obtained. Accordingly, when external pressure is applied, the coupling part 210 has fluidity within a certain range.

Therefore, even if a shock is applied to the modularized liquid crystal display device from the outside, the fastening portion 210 has fluidity within a certain range, so that even if vibration and impact are applied by any pressure, It is possible to prevent breakage of the light guide plate (123 in Fig. 2) from occurring.

The second vertical part 211 of the fastening part 210 is formed so as to be thinner toward the end perpendicular to the longitudinal direction so that the guide groove of the fastening part 210 and the light guide plate 123 Thereby minimizing the contact area of the contact surface 123a.

2) 123a of the light guide plate 123 (see FIG. 2) and the fastening portion 210 (see FIG. 2) of the light guide plate 123 2) of the light guide plate (123 in FIG. 2) is brought into contact with the second vertical portion 211, the second vertical portion 211 of the light guide plate (123a in FIG. 2) of the guide grooves 123 of the guide grooves 123a.

Therefore, it is preferable that the above-mentioned phenomenon is minimized by minimizing the contact area between the second vertical portion 211 of the fastening portion 210 and the guide groove (123a in Fig. 2) of the light guide plate 123 .

The structure of the cover bottom (150 in FIG. 2) assembled and fastened to the guide panel 130 of the present invention will be described in detail with reference to FIGS. 4A to 4C.

4A is a perspective view schematically showing a cover bottom according to an embodiment of the present invention, FIG. 4B is an enlarged view of FIG. 4A, and FIG. 4C is a cross-sectional view schematically showing a cross section of a latch portion of a cover bottom .

2, the cover bottom 150 according to the embodiment of the present invention is in the form of a rectangular plate having a side 153 with a vertically bent edge, 151 and a side 153 whose edge is vertically bent upward.

A backlight unit (120 in FIG. 2) guided by the guide panel (130 in FIG. 3A) is supported and supported on the cover bottom 150.

At this time, corresponding to the fastening holes (135 in FIG. 3A) formed in the first vertical portion (131 in FIG. 3A) of the guide panel (130 in FIG. 3A), the outer surface of the side surface 153 of the cover bottom 150 A plurality of fastening protrusions 155 are formed to protrude.

The cover bottom 150 of the present invention corresponds to the fastening portion 210 of FIG. 3A of the guide panel 130 shown in FIG. 3A. The side surface 153 and the horizontal surface 151 of the cover bottom 150 are partially The engaging portion 220 is further formed.

That is, the engaging portion 220 is formed such that a part of the side surface 153 is perpendicular to the first jaw 221 and the first jaw 221 that are inwardly inward from the side surface 153 to the inside of the side surface 153, A second jaw 223 formed so as not to face the second jaws 153 and a horizontal surface 151 extending vertically from the second jaws 223.

Accordingly, the latching portion 220 has a stepped shape in cross section.

3 (a)) of the guide panel (130 in FIG. 3A) of the guide panel of the present invention, the cover bottom 150 is inserted into the guide panel (130 in FIG. 3A) even if shrinkage and expansion due to material properties of the guide panel (130 in FIG.

This will be described in more detail with reference to FIGS. 5A to 5E and FIGS. 6A to 6B.

FIGS. 5A to 5E are exploded perspective views schematically showing a fastening state of the guide panel and the cover bottom, and FIGS. 6A to 6B are a perspective view and a front view schematically showing a fastened state of the guide panel and the cover bottom.

5A and 5E, the reflection plate 125 is mounted on the horizontal surface 151 of the cover bottom 150 and the light guide plate 123 and the guide panel 130 are sequentially disposed on the reflection plate 125 Located.

At this time, the side surface 153 of the cover bottom 150 protrudes outwardly with a fastening protrusion 155 protruding from the side surface 153 of the cover bottom 150 to have a predetermined inclination, And a stepped surface 155a is provided at the bottom.

The cover bottom 150 has a side wall 153 of the cover bottom 150 and an engaging portion 220 having a horizontal surface 151 recessed inward.

The engaging portion 220 is formed so that a part of the side surface 153 is perpendicular to the first jaw 221 and the first jaw 221 perpendicular to the side surface 153 from the side surface 153 to the inside of the side surface 153, And a horizontal surface 151 extending vertically from the second jaw 223.

The first vertical portion 131 of the guide panel 130 assembled with and coupled to the cover bottom 150 has a fastening protrusion 155 inserted into the side surface 153 of the cover bottom 150, (Not shown).

A horizontal portion 133 perpendicular to the first vertical portion 131 and a second vertical portion 132 perpendicular to the horizontal portion 133 and facing the first vertical portion 131 are formed in the first vertical portion 131, And a fastening part 210 including first and second side surfaces 213a and 213b provided at both ends of the second vertical part 211. [

At this time, the fastening part 210 formed inside the first vertical part 131 of the guide panel 130 includes the first and second vertical parts 131 and 211, the horizontal part 133, And a predetermined space is defined internally by the openings 213a and 213b.

6A, the light guide plate 123 is mounted on the reflection plate 125 mounted on the horizontal surface 151 of the cover bottom 150, and the guide panel 130 is positioned on the edge of the light guide plate 123 The guide panel 130 is moved from the upper side to the lower side so that the inner surface of the first vertical portion 131 of the guide panel 130 is in contact with the outer surface of the side surface 153 of the cover bottom 150, The cover bottom 150 and the guide panel 130 are assembled and fastened to each other.

At this time, the fastening protrusion 155 of the cover bottom 150 is inserted into the fastening hole 135 of the guide panel 130, and the fastening protrusion 155 inserted into the fastening hole 135 is inserted into the stepped surface 155a. Is engaged with the fastening hole (135) of the guide panel (130).

Thus, the guide panel 130 and the cover bottom 150 are assembled and fastened to each other.

The first and second vertical parts 131 and 211 and the horizontal part 133 of the fastening part 210 formed on the inner side of the first vertical part 131 of the guide panel 130 and the first and second side parts The engaging portion 220 of the cover bottom 150 is inserted into a predetermined space defined internally by the engaging portions 213a and 213b.

The fastening part 210 of the guide panel 130 and the fastening part 220 of the cover bottom 150 are aligned with each other in a state where the fastening part 210 and the fastening part 220 are fastened together. The engaging portion 220 of the cover bottom 150 is inserted into a predetermined space of the fastening portion 210 of the guide panel 130.

At this time, the outer side surface of the side surface 153 of the engaging portion 220 of the cover bottom 150 is in close contact with the inner surface of the first vertical portion 131 of the guide panel 130, And the inner surface of the second vertical portion 211 of the guide panel 130 is in close contact with the inner surface of the second vertical portion 211.

The first width w1 between the first and second side surfaces 213a and 213b, which is the width in the longitudinal direction of the second vertical portion 211 of the coupling portion 210 into which the coupling portion 220 is inserted, It is preferable to correspond to the second width w2 of the latching portion 220 so that the latching portion 220 can be inserted into the latching portion 220 and the third portion 232 between the first vertical portion 131 and the second vertical portion 211 It is preferable that the width w3 is formed to correspond to the fourth width w4 which is the width of the first step 221 of the engaging portion 220. [

Accordingly, the guide panel 130 is moved in the X-axis direction and the Z-axis direction defined by the drawing by the engaging portion 220 of the cover bottom 150 inserted into the fastening portion 210 of the guide panel 130 .

That is, the guide panel 130 made of a synthetic resin material such as polycarbonate has a heat characteristic such that the liquid crystal panel 110 of FIG. 2 is driven or the heat generated by the driving of the backlight unit 120 Shrinkage and swelling occur due to temperature changes due to, for example,

The liquid crystal display device of the present invention is configured such that the guide panel 130 is rotated by the guide panel 130 in a predetermined space of the coupling part 210, It is possible to prevent the flow in the X axis direction and the Z axis direction defined in the drawing.

That is, when the guide panel 130 is about to generate a flow in the -X-axis direction, as the first vertical part 131 of the guide panel 130 is in close contact with the engaging part 220 of the cover bottom 150, The flow of the panel 130 is interrupted and when the guide panel 130 attempts to generate a flow in the + X axis direction, the second vertical part 211 of the guide panel 130 contacts the hook part 150 of the cover bottom 150, The flow of the guide panel 130 is blocked as it is in close contact with the guide plate 220.

6B, when the guide panel 130 is about to generate a flow in the -Z axis direction and the + Z axis direction, the first and second side surfaces 213a and 213b of the coupling part 210 The flow of the guide panel 130 is blocked.

Therefore, even if shrinkage and expansion occur due to the material characteristics of the guide panel 130, it is possible to prevent the guide panel 130 from flowing and prevent the flow of the light guide plate 123 due to the flow of the guide panel 130 .

At least one of the fastening part 210 of the guide panel 130 and the fastening part 220 of the cover bottom 150 may be provided along the longitudinal direction of the guide panel 130 and the cover bottom 150 .

The fastening part 210 of the guide panel 130 is inserted into the guide groove 123a formed at the edge of the light guide plate 123 so that the position of the light guide plate 123 is also fixed through the fastening part 210. [

Accordingly, it is possible to prevent the LED (129a in FIG. 2) of the LED assembly (129a in FIG. 2) from being broken due to the flow of the light guide plate 123 or the problem that the optical characteristics of the liquid crystal display device are changed, can do.

At this time, the fastening part 210 of the guide panel 130 is formed such that the first and second side surfaces 213a and 213b are spaced apart from the first vertical part 131 by a predetermined distance (d in FIG. 3B) The spring 210 has an elastic restoring force like a spring in the X axis direction defined in the drawing.

Therefore, even if a shock is applied to the modularized liquid crystal display device from the outside, the fastening portion 210 has fluidity within a certain range, so that even if vibration and impact are applied by any pressure, It is possible to prevent the light guide plate 123 from being damaged.

The liquid crystal display according to the above-described embodiment of the present invention allows the cover bottom 150 and the guide panel 130 to be assembled and fastened through a hook type fastening system so that a fixing member (not shown) such as a screw is not used It is possible to realize a liquid crystal display device having a narrow bezel.

This can prevent an increase in the material cost due to the consumption of a fixing member (not shown) such as a screw, and the liquid crystal panel 110 (see FIG. 2) It is possible to minimize the time, cost, and waste of manpower in modularizing the liquid crystal display device.

Particularly, in the liquid crystal display of the present invention, the engagement part 220 is provided on the cover bottom 150 and the fastening part 210 corresponding to the engagement part 220 is formed on the guide panel 130, It is possible to prevent the guide panel 130 from flowing even when the guide panel 130 is shrunk or expanded due to the material properties thereof.

This can prevent the flow of the light guide plate 123 due to the flow of the guide panel 130. This prevents breakage of a large number of LEDs (129a in FIG. 2) of the LED assembly (129 in FIG. 2) It is possible to prevent a problem that the optical characteristics of the liquid crystal display device are changed and the image quality is lowered.

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.

123: light guide plate 123a (guide groove)
125: reflector
130: guide panel 131 (first vertical portion, 133: horizontal portion, 135: fastening hole)
150: cover bottom 151 (horizontal surface, 153: side surface, 155: fastening projection, 155a: stepped surface)
210: fastening portion (211: second vertical portion, 213a, 213b: first and second side surfaces)
220: engaging portion (221: first jaw, 223: second jaw)

Claims (10)

A liquid crystal panel;
A backlight unit positioned on a rear surface of the liquid crystal panel;
A cover bolt on which the backlight unit is mounted, a cover protrusion provided on an outer side surface of the side surface, and a latching portion provided on an inner side of the side surface;
A first vertical part having a fastening hole through which the fastening protrusion is inserted and which has an edge of the backlight unit inserted therein, a horizontal part vertically bent from the first vertical part to support the liquid crystal panel, A guide panel
And the liquid crystal display device.
The method according to claim 1,
Wherein the fastening portion includes a first vertical portion bent perpendicularly from the horizontal portion and a second vertical portion facing the first vertical portion, and first and second side surfaces parallel to each other at both ends in the longitudinal direction of the second vertical portion, Device.
3. The method of claim 2,
Wherein the first and second side surfaces are spaced apart from the first vertical portion by a predetermined distance.
3. The method of claim 2,
Wherein the latching portion is inserted into the space defined by the first and second vertical portions and the first and second side surfaces.
5. The method of claim 4,
Wherein the engaging portion comprises a first jaw perpendicular to the inner side from the side surface and a second jaw perpendicular to the first jaw and not facing the side surface and the outer side surface of the side surface is in close contact with the inner surface of the first vertical portion And the second jaw is in close contact with an inner surface of the second vertical portion.
3. The method of claim 2,
Wherein the backlight unit includes a light guide plate having a guide groove at an edge thereof, and the fastening portion is inserted into the guide groove.
The method according to claim 6,
And the guide groove is in close contact with an outer surface of the second vertical portion.
3. The method of claim 2,
And the width between the first and second side surfaces corresponds to the width of the engagement portion.
3. The method of claim 2,
And the width between the first vertical portion and the second vertical portion corresponds to the width of the first jaw of the engagement portion.
The method according to claim 6,
Wherein the backlight unit includes an LED assembly and an optical sheet.

Images