KR101442583B1 - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device having a narrow bezel.
A feature of the present invention is that the guide panel and the cover bottom are assembled through a clip and fixed to the optical sheet. Accordingly, it is possible to prevent deterioration of the image quality of the liquid crystal panel due to foreign substances generated when the fixing member such as a screw is fastened, and it is possible to minimize the time, cost, and wasted manpower for modularizing the liquid crystal display device.
In addition, it is possible to omit a separate component for fixing the optical sheet, thereby reducing the process cost and improving the efficiency of the process. Further, by arranging the projections of the optical sheet to be folded, Area can be reduced, and a narrow bezel can be implemented.

Description

[0001] Liquid crystal display device [0002]

The present invention relates to a liquid crystal display device, and more particularly to a liquid crystal display device having a narrow bezel.

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.

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

As shown, a liquid crystal display device including a general backlight unit 20 includes a liquid crystal panel 10, a backlight unit 20, a guide panel 30, a cover bottom 50, and a top cover 40 do.

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.

The optical sheet 21 located above the light guide plate 23 includes a diffusion sheet and at least one light collecting sheet and the like. The optical sheet 21 includes a fixing hole 21b as shown in FIG. 2 And the sheet hanging portion 55 formed on the cover bottom 50 is inserted into the fixing hole 21b of the protruding portion 21a of the optical sheet 21, And its position is fixed in the liquid crystal display device.

The fixing structure of the optical sheet 21 requires a separate component for fixing the optical sheet 21 such as the sheet holding portion 55 of the cover bottom 50, It is difficult to realize a narrow bezel because a bezel area is required by the protruding portion 21a formed in the bezel.

That is, in order to fix the optical sheet 21 through the protruding portion 21a, a bezel region corresponding to the protruding portion 21a of the optical sheet 21 is required. The protruding portion 21a, The gap a between the region AA and the fixing hole 21b and the width b of the fixing hole 21b and the distance c between the fixing hole 21b and the edge of the protruding portion 21a A width w1 of at least 6 to 7 mm is required.

Therefore, when the thickness d1 of the guide panel 30 is about 1 mm, a bezel area of at least 7 to 8 mm is required.

Therefore, it is difficult to realize a liquid crystal display device of a narrow bezel which is recently required.

The top cover 40, the guide panel 30 and the cover bottom 50 for modularizing the liquid crystal panel 10 and the backlight unit 20 are assembled and fastened to each other through fixing members (not shown) such as screws However, when such a screw is used, the image quality of the liquid crystal panel 10 may be deteriorated due to a foreign substance generated when the screw is fastened. This may cause a time for screw fastening and an inconvenience in the process of the operator.

It is a first object of the present invention to provide a liquid crystal display device having a narrow bezel for solving the above problems.

A second object of the present invention is to prevent foreign matters from being generated due to the use of a fixing member such as a screw, increase in process time, and deterioration of process efficiency.

In order to accomplish the above object, the present invention provides an optical sheet including a light guide plate, an LED assembly disposed at one side of the light guide plate, and an optical sheet having a protruding portion located at an upper portion of the light guide plate and including a fixing hole A backlight unit; A guide panel assembled with the cover bottom and covering an edge of the backlight unit;

A liquid crystal panel seated on the guide panel; And a clip coupled to the cover bottom and the coupling side of the guide panel to assemble and tighten the optical sheet, the cover bottom, and the guide panel.

The clip may include a first clip portion, a second clip portion perpendicular to the first clip portion, and a third clip portion perpendicular to the second clip portion and facing the first clip portion, And an end of the clip portion is formed with a hooked end bent toward the first clip portion.

The protrusion of the optical sheet may be formed in a shape corresponding to the clip hole so that the protrusion of the optical sheet is positioned on the side of the optical sheet, And the first clip part is inserted into the clip hole and the fixing hole, and the third clip part surrounds a part of the backside of the cover bottom.

Here, the latching portion is located at a first step where the side face of the cover bottom is recessed inward from the outer side, and the clip hole is located at the second step where the side of the guide panel is recessed inward from the outer side.

The length of the first clip part is longer than the width of the side surface of the guide panel, the width of the first clip part corresponds to the width of the clip hole and the fixing hole, and the protrusion of the optical sheet is formed A folding line is formed at the edges.

Wherein the optical sheet is temporarily fixed by the sheet fixing tape, and the sheet fixing tape includes a first hole corresponding to the fixing hole formed in the protruding portion bent downward perpendicularly to the optical sheet, A plurality of second holes are formed on the sheet fixing tape attached to a part of the upper surface of the optical sheet.

The end of the first clip unit is rounded, and a pad is provided on the inner side of the second clip unit and the third clip unit.

In addition, at least two of the clips are spaced apart from each other along one edge of the cover bottom or the guide panel.

As described above, according to the present invention, the image quality of the liquid crystal panel is deteriorated due to foreign substances generated when the fixing member such as a screw is fastened, Thus, it is possible to minimize the time, cost, and labor of modularizing the liquid crystal display device.

In addition, there is an effect of omitting a separate component for fixing the optical sheet, thereby reducing the process cost and improving the efficiency of the process. Further, by arranging the projections of the optical sheet to be folded, It is possible to reduce the area of the bezel by the protruding portion of the sheet, thereby realizing a narrow bezel.

1 is a cross-sectional view of a liquid crystal display device including a general backlight unit using an LED as a light source.
Fig. 2 is a plan view schematically showing a bezel region by a protrusion of an optical sheet. Fig.
3 is an exploded perspective view of a liquid crystal display device according to an embodiment of the present invention.
4A to 4C are perspective views schematically showing the structure of a clip according to an embodiment of the present invention.
5A to 5F are perspective views sequentially illustrating the modularization process of the liquid crystal display device according to the embodiment of the present invention.
6A to 6C are perspective views sequentially illustrating a modularization process of a liquid crystal display device according to another embodiment of the present invention.

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

3 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 properly brought into close contact with the side surface of the panel 130 or the back surface of the cover bottom 150.

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 and efficiency of light.

The optical sheet 121 on the light guide plate 123 includes a diffusion sheet, at least one light condensing sheet, and the like.

Here, the diffusion sheet is positioned directly above the light guide plate 123, and serves to adjust the direction of light so that the light travels toward the light condensing sheet while dispersing the light incident through the light guide plate 123.

The light diffused through the diffusion sheet is condensed in the direction of the liquid crystal panel 110 by the condensing sheet. Therefore, the light passing through the light condensing sheet is almost perpendicular to the liquid crystal panel 110.

A protrusion 121a including a fixing hole 121b is protruded from the edge of the optical sheet 121. A plurality of fine slit holes are arranged in a line on the edge of the optical sheet 121 protruding from the protrusion 121a A folding line 121c formed by perforation is formed.

The protrusion 121a is bent downward perpendicular to the optical sheet 121 by folding the protrusion 121a along the folding line 121c in the course of modularization of the optical sheet 121. [

The optical sheet 121 is fixed without flowing in the liquid crystal display through the protruding portion 121a bent downward perpendicularly to the optical sheet 121 as described above. Let me take a closer look at this later.

Meanwhile, the backlight unit 120 having the above-described structure is called a side light type, and a plurality of LEDs 129a may be arranged in a plurality of layers on the PCB 129b, and the light- It is also possible that they are arranged side by side along the longitudinal direction of both edges.

Also, a direct type in which a plurality of LED assemblies 129 are arranged in parallel under the liquid crystal panel 110 in a state in which the light guide plate 123 is omitted may be used.

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 surface 151 serves as a lower frame that supports the entire liquid crystal display device and minimizes the occurrence of light loss. The edge of the horizontal surface 151 is bent vertically to cover the side surface 153 of the cover bottom It accomplishes.

A first step 155 is formed on the side surface 153 of the cover bottom 150 at a predetermined distance from the outer side surface of the cover 153. The cover bottom 150 formed at the first step 155 Of the cover bottom 150 is thinner than the side 153 of the cover bottom 150 of the other area.

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 guides the liquid crystal panel 110 and the backlight unit 120 to the inside of the side surface 131 of the guide panel 130 and the side surface 131 of the guide panel 130, 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 guide panel 130 and the cover bottom 150 are assembled and fastened to each other through a plurality of clips 200. For this purpose, the clip 200 is inserted along the edge of the guide panel 130 A clip hole 137 is formed.

The clip 200 is inserted into the clip hole 137 of the guide panel 130 so as to cover a part of the backside of the cover bottom 150 so that the guide panel 130 and the cover bottom 150 are assembled And fastened.

At this time, the fixing hole 121b of the protruded portion 121a folded along the folding line 121c of the optical sheet 121 is formed in correspondence with the clip hole 137 of the guide panel 130, 200 pass through the fixing hole 121b of the optical sheet 121 in the process of being inserted into the clip hole 137 of the guide panel 130. [

Thus, the optical sheet 121 is fixed.

That is, in the liquid crystal display device of the present invention, the guide panel 130 and the cover bottom 150 are assembled through the clip 200 and fixed to the optical sheet 121.

Accordingly, the liquid crystal display of the present invention does not use a fixing member (not shown) such as a screw, so that the image quality of the liquid crystal panel 110 is deteriorated due to a foreign substance generated when a fixing member (not shown) And it is possible to minimize time, cost, and waste of manpower in modularizing the liquid crystal display device.

In addition, it is possible to omit a separate component (55 in Fig. 2) for fixing the optical sheet 121, which can reduce the process cost and the efficiency of the process, 121a of the optical sheet 121 can be folded, the bezel area by the projecting portion 121a of the optical sheet 121 can be reduced, and a narrow bezel can be realized.

At this time, the clip 200 is inserted into at least two edges of the cover bottom 150 and the guide panel 130, thereby improving the fastening force between the cover bottom 150 and the guide panel 130, To be assembled and fastened.

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. Through the elimination of the top cover (40 in FIG. 1), a lightweight, thin and thinner bezel And it is possible to simplify the process.

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

4A to 4C are perspective views schematically showing the structure of a clip according to an embodiment of the present invention.

4A, a clip 200 for assembling and fastening a guide panel (130 in FIG. 3) and a cover bottom (150 in FIG. 3) to each other according to an embodiment of the present invention includes a first clip portion 210 A second clip part 220 perpendicular to the first clip part 210 and a third clip part 230 perpendicular to the second clip part 220 and facing the first clip part 210.

At the end of the third clip part 230, a hooking end 240 bent from the third clip part 230 toward the first clip part 210 is formed.

The overall shape of the clip 200 is substantially "C ".

It is preferable that the clip 200 is made of a metal material so as to maintain its elasticity and strength even if it is bent as described above.

3) of the guide panel (130 in Fig. 3) and the fixing hole (121b in Fig. 3) of the optical sheet (121 in Fig. 3) The second clip portion 220 is formed to cover the side surfaces (131 and 153 in FIG. 3) of the guide panel (130 in FIG. 3) and the cover bottom The third clip portion 230 is fastened to the backside of the cover bottom (150 in FIG. 3) through the hooking end 240. The cover bitumen (150 in FIG.

At this time, a locking groove (not shown) may be further formed on the back surface of the cover bottom (150 in FIG. 3) to be assembled with the locking end 240.

3) of the guide panel (130 in FIG. 3) and the fixing hole (121b in FIG. 3) of the optical sheet (121 in FIG. 3) of the clip (200) The optical sheet 121 of FIG. 3 is fixed to the inside of the guide panel 130 (FIG. 3) through the first clip portion 210 of the clip 200, The third clip portion 230 of the cover clip 130 encloses a part of the backside of the cover bottom (150 in FIG. 3) to assemble and fasten the guide panel (130 in FIG. 3) and the cover bottom (150 in FIG.

The length d2 of the first clip portion 210 of the clip 200 may be equal to the width of the guide panel 130 in FIG. 3, that is, the width of the side surface of the guide panel 130 3) of the guide panel (130 in FIG. 3) through the clip hole (137 in FIG. 3) of the guide panel (130 in FIG. 3) (121b in Fig. 3) of the optical sheet (121 in Fig. 3) surrounded by the edge.

The width w2 of the first clip portion 210 is set so that the clip hole (137 in Fig. 3) and the optical sheet (121 in Fig. 3) formed on the side surface (131 in Fig. 3) The widths w3, w4 and w2 of the clip hole (137 in Fig. 3) and the fixing hole (121b in Fig. 3) are set so that they can be inserted into the fixing holes (121b in Fig. 3) formed in the protruding portions See FIG. 5F).

That is, the clip hole (137 in FIG. 3) and the fixing hole (121b in FIG. 3) are formed to be about 1.1 to 1.2 times larger than the width w2 of the first clip portion 210, (137 in FIG. 3) and the fixing hole (121b in FIG. 3) in the process of passing through the clip hole (137 in FIG. 3) and the fixing hole will be.

The height h1 of the second clip portion 220 surrounding the side surface (153 in Fig. 3) of the cover bottom (150 in Fig. 3) is smaller than the height h1 of the side surface (153 in Fig. 3) 3) of the clip 200 in the process of assembling the cover bottom (150 in FIG. 3) and the guide panel (130 in FIG. 3) 210) is inserted into the clip hole (137 in FIG. 3) of the guide panel (130 in FIG. 3) so that the third clip portion 230 can cover a part of the backside of the cover bottom (150 in FIG. 3).

The length d3 of the third clip unit 230 may be equal to the length d2 of the first clip unit 210. As shown in the figure, It is preferable to further improve the fastening force of the guide panel (130 in FIG. 3) and the cover bottom (150 in FIG. 3) assembled and fastened through the clip 200.

As shown in FIG. 4B, the clip of the present invention can be formed so that the end of the first clip 210 is formed in a round shape, and the end of the first clip 210 is rounded 3), it is possible to prevent damage to the optical sheet 121 (see FIG. 3) in the process of inserting the first clip portion 210 into the fixing hole 121b of the optical sheet 121 have.

4C, the pad 200 is further provided on the second clip unit 220 and the third clip unit 230 of the clip 200, so that the clip 200, which is made of a metal, The guide panel (130 in FIG. 3), and the cover bottom (150 in FIG. 3).

Here, the pad 250 serves as a cushion capable of absorbing an external shock, and thus the clip 250 is fastened to the guide panel (130 in FIG. 3) and the cover bottom (150 in FIG. 3) It is possible to prevent the damage of the guide panel (130 in FIG. 3) and the cover bottom (150 in FIG. 3) from occurring.

3) of the guide panel (130 in Fig. 3) and the clip (200 in Fig. 3) can be prevented by preventing the guide panel (130 in Fig. 3) The pad 250 can absorb the shock even if an impact is applied from the outside through the pad 250 and the cover can be more stably supported by the guide panel 130 And the clip 200 can be fastened. That is, in the liquid crystal display of the present invention, the guide panel (130 of FIG. 3) and the cover bottom (150 of FIG. 3) are assembled and fastened to each other through the clip 200, .

Accordingly, the liquid crystal display of the present invention does not use a fixing member (not shown) such as a screw to prevent the liquid crystal panel (110 of FIG. 3) from being adhered to the liquid crystal panel It is possible to prevent the deterioration of the image quality, and it is possible to minimize the time, cost, and wasted manpower in modularizing the liquid crystal display device.

3) can be omitted, which can reduce the process cost and the efficiency of the process. Further, it is possible to improve the process efficiency of the optical sheet (121 of FIG. 3) 3) of the optical sheet (121 in Fig. 3) can be reduced, and a narrow bezel can be realized.

The modularization process of the liquid crystal display according to the embodiment of the present invention will be described in detail with reference to FIGS. 5A to 5F.

5A to 5F are perspective views sequentially illustrating the modularization process of the liquid crystal display device according to the embodiment of the present invention.

5A, the reflection plate 125 is placed on the horizontal surface 151 of the cover bottom 150, and the light guide plate 123, the optical sheet 121, and the guide panel 130 Respectively.

A first step 155 is formed on the side surface 153 of the cover bottom 150 at a predetermined distance from the outer side surface of the cover 153. The cover bottom 150 formed at the first step 155 Of the cover bottom 150 is thinner than the side 153 of the cover bottom 150 of the other area.

The side face 153 of the cover bottom 150 formed at the first step 155 is formed at a lower height than the side face 153 of the cover bottom 150 of the other area to form the engaging part 157 .

The optical sheet 121 is positioned such that the first step 155 formed on the side surface 153 of the cover bottom 150 corresponds to the protruding portion 121a of the optical sheet 121, The clip hole 137 formed in the cover bottom 150 is positioned so as to correspond to the first step 155 formed on the side surface 153 of the cover bottom 150.

The clip hole 137 formed in the side surface 131 of the guide panel 130 is formed on the second step 135 in which the side surface 131 of the guide panel 130 is recessed from the outer surface at predetermined intervals.

By forming the first and second steps 155 and 135 on the outer surface of the side surface 153 of the cover bottom 150 and the outer surface of the side surface 131 of the guide panel 130, The outer surface of the second clip portion 220 of the clip 200 to be inserted into the cover bottom 150 and the guide panel 130 to be assembled and fastened to the guide panel 130, And the outer surface of the protrusion 131 may be flush with the outer surface.

Therefore, the clip 200 can prevent the bezel area of the liquid crystal display device from being widened.

The clip 200 is positioned such that the ends of the first and third clip portions 210 and 230 face the cover bottom 150 toward the front of the first step 155 of the cover bottom 150.

Next, as shown in FIG. 5B, the light guide plate 123 and the optical sheet 121 are sequentially placed on the reflection plate 125, which is placed on the horizontal surface 151 of the cover bottom 150, The protruding portion 121a of the optical sheet 121 is bent downward perpendicularly to the optical sheet 121 along the folding line 121c as shown in Fig.

At this time, the fixing hole 121b formed in the folded protrusion 121a is positioned corresponding to the engaging portion 157 of the cover bottom 150. [

5D, when the guide panel 130 is assembled with the cover bottom 150, the inner surface of the side surface 131 of the guide panel 130 contacts the side surface 153 of the cover bottom 150 The cover bottom 150 and the guide panel 130 are assembled by pushing the cover bottom 150 from the lower side to the upper side from the upper side to the lower side such that the guide panel 130 is in close contact with the outer surface.

At this time, the clip hole 137 formed in the side surface 131 of the guide panel 130 is located in correspondence with the fixing hole 121b formed in the bent projection 121a of the optical sheet 121.

5E and 5F, the first clip portion 210 of the clip 200 is inserted into the clip hole 137 of the guide panel 130 and the fixing hole 121b of the optical sheet 121 And the third clip unit 230 inserts the clip 200 into the guide panel 130 and the cover bottom 150 so as to cover a part of the backside of the cover bottom 150.

The length d2 of the first clip part 210 is longer than the width d4 of the guide panel 130 so that the first clip part 210 is inserted into the clip hole 137 of the guide panel 130 And is inserted into the fixing hole 121b of the optical sheet 121 whose edge is surrounded by the guide panel 130. [

The width w2 of the first clip portion 210 is tightly inserted into the fixing hole 121b formed in the clip hole 137 of the guide panel 130 and the protruding portion 121a of the optical sheet 121 The first clip portion 210 is formed to correspond to the widths w3 and w4 of the clip hole 137 and the fixing hole 121b so that the clip hole 137 of the guide panel 130 and the optical sheet 121 And is inserted into the fixing hole 121b.

The third clip portion 230 of the clip 200 which covers a part of the backside of the cover bottom 150 is fixed to the backside of the cover bottom 150 through the end portion 240 formed at the end. (Not shown) may be further formed on the rear surface of the engaging protrusion 150 to engage with the engaging protrusion 240.

Accordingly, the guide panel 130 and the cover bottom 150 are assembled and fastened to each other to have a fastening force in the X-axis direction and the Y-axis direction defined in the drawing.

That is, the guide panel 130 is prevented from being detached from the front of the cover bottom 150 through the first clip portion 210 of the clip 200, and the cover bottom 150 is prevented from being detached from the third clip portion 230 So that the guide panel 130 and the cover bottom 150 have the fastening force in the Y-axis direction defined in the drawing.

The cover bottom 150 is prevented from being detached in the X axis direction defined by the side surface 131 of the guide panel 130 and the guide panel 130 is inserted into the clip hole 137 The clip portion 210 prevents the guide panel 130 and the cover bottom 150 from being detached in the X-axis direction defined in the figure, and the fastening force of the guide panel 130 and the cover bottom 150 in the X- 130 and the cover bottom 150 are assembled and fastened to each other.

Accordingly, the liquid crystal display of the present invention does not use a fixing member (not shown) such as a screw to prevent the liquid crystal panel (110 of FIG. 3) from being adhered to the liquid crystal panel It is possible to prevent the deterioration of the image quality, and it is possible to minimize the time, cost, and wasted manpower in modularizing the liquid crystal display device.

The liquid crystal display device of the present invention is characterized in that the protruding portion 121a of the optical sheet 121 is folded back so that the first clip portion 210 of the clip 200 is fixed to the fixing hole 121a of the protruding portion 121a of the optical sheet 121, The optical sheet 1221 can be fixed to the optical sheet 1221 through the clip 200 and the optical sheet 121 can be omitted. Can be improved.

In addition, by configuring the protruding portion 121a of the optical sheet 121 to be folded, the bezel area by the protruding portion 121a of the optical sheet 121 can be reduced, and a narrow bezel can be realized.

That is, the conventional optical sheet (21 in Fig. 2) has a gap (Fig. 2 (a)) between the active area and the fixed hole (21b in Fig. 2) (W1 in Fig. 2) is required by at least 6 to 7 mm in accordance with the distance between the fixing hole (21b in Fig. 2) and the edge of the projection (21a in Fig. 2) The liquid crystal display device of the present invention requires at least a bezel area of 7 to 8 mm when the width of the side surface of the guide panel 130 (d1 in FIG. 2) is about 1 mm. And the first and second steps 135 and 155 are formed on the cover bottom 150 and the guide panel 130 so that the gap between the active area of the optical sheet 121 and the fixing hole 121b Only a bezel area of 0.3 mm and a width d4 of the side surface of the guide panel 130, which is about 1 mm, is required, thereby realizing a narrow bezel.

6A to 6C are perspective views sequentially illustrating the modularization process of the liquid crystal display device according to another embodiment of the present invention.

First, as shown in 6a, the light guide plate (123 in FIG. 5A) and the optical sheet 121 are sequentially placed on the reflective plate (125 in FIG. 5A) that is seated on the horizontal plane 5A) of the optical sheet 121 is bent downward perpendicularly to the optical sheet 121 along a folding line (121c in FIG. 5A) to form a fixing hole (121b in Fig. 5F) is located corresponding to the latching portion (157 in Fig. 5A) of the cover bottom 150. Fig.

Next, the optical sheet 121 is temporarily fixed through the sheet fixing tape 300 such as an adhesive tape.

The sheet fixing tape 300 is attached to cover a part of the upper surface of the optical sheet 121, the first step 155 of the cover bottom 150 and a part of the back side of the cover bottom 150, , A first hole 310 corresponding to a fixing hole (121b in FIG. 5A) formed in a protruding portion (121a in FIG. 5A) of the optical sheet 121 is formed.

A plurality of second holes 320 may be further formed in the sheet fixing tape 300 so as to surround a part of the upper surface of the optical sheet 121 so as to cover a part of the upper surface of the optical sheet 121. The plurality of second holes 320 formed in the attached region can prevent the optical sheet 121 from being wrinkled due to thermal expansion.

6 (b), the inner surface of the side surface 131 of the guide panel 130 is joined to the side surface 153 of the cover bottom 150, The cover bottom 150 and the guide panel 130 are assembled by pushing the cover bottom 150 from the lower side to the upper side from the upper side to the lower side such that the guide panel 130 is in close contact with the outer surface.

The clip hole 137 formed in the side surface 131 of the guide panel 130 is positioned in correspondence with the first hole 310 formed in the sheet fixing tape 300.

Here, the width w5 of the first hole 310 formed in the sheet fixing tape 300 is formed to correspond to the width of the fixing hole (121b in FIG. 5A) and the width of the clip hole 137 (w3 and w4 in FIG. 5F) The first clip portion 210 is inserted into the first hole 310 of the sheet fixing tape 300 and the clip hole 137 of the guide panel 130 and the protruding portion 121a of the optical sheet 121 It is preferable to form it so that it can be inserted into the formed fixing hole 121b in a tight manner.

6C, the first clip portion 210 of the clip 200 is inserted into the clip hole 137 of the guide panel 130 and the first hole 310 of the sheet fixing tape 300, The third clip portion 230 is inserted into the fixing hole 121b of the seat 121 and the clip 200 is inserted into the guide panel 130 and the cover 130 so as to cover a part of the backside of the cover bottom 150. [ And inserted into the bottom (150).

Accordingly, the guide panel 130 and the cover bottom 150 are assembled and fastened to each other to have a fastening force in the X-axis direction and the Y-axis direction defined in the drawing.

Accordingly, the liquid crystal display of the present invention does not use a fixing member (not shown) such as a screw to prevent the liquid crystal panel (110 of FIG. 3) from being adhered to the liquid crystal panel It is possible to prevent the deterioration of the image quality, and it is possible to minimize the time, cost, and wasted manpower in modularizing the liquid crystal display device.

In addition, it is possible to omit a separate component (55 in Fig. 2) for fixing the optical sheet 121, which can reduce the process cost and the efficiency of the process, and the protrusion of the optical sheet 121 It is possible to reduce the bezel area due to the protruding portion (121a in Fig. 5A) of the optical sheet 121, thereby realizing a narrow bezel.

After fixing the optical sheet 121 through the sheet fixing tape 300 as described above, the first clip portion 210 of the clip 200 is inserted into the clip hole 137 of the guide panel 130 and the sheet- It is possible to prevent the optical sheet 121 from flowing in the process of inserting the optical sheet 121 into the first hole 310 of the optical sheet 300 and the fixing hole 121b of the optical sheet 121, 130, the cover bottom 150, and the optical sheet 121 can be assembled and fastened.

As described above, in the liquid crystal display device of the present invention, the guide panel 130 and the cover bottom 150 are assembled through the clip 200 and fixed to the optical sheet 121, It is possible to prevent the image quality of the liquid crystal panel (110 in FIG. 3) from being deteriorated due to the foreign substances generated when the fixing member (not shown) such as a screw is fastened due to the absence of the member (not shown) Time and cost, and waste of manpower can be minimized.

In addition, it is possible to omit a separate component (55 in Fig. 2) for fixing the optical sheet 121, which can reduce the process cost and the efficiency of the process, The bezel area by the protruding portion (121a in Fig. 5A) of the optical sheet 121 can be reduced, and a narrow bezel can be realized.

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.

121: optical sheet (121a: projection, 121b: fixing hole, 121c: folding line)
123: light guide plate, 125: reflector
130: guide panel 131 (side surface, 133: horizontal portion)
135: second stage, 137: clip hole
150: cover bottom (151: horizontal plane, 153: side)
155: first step, 157:
(200) comprising: a clip (210) having a first clip portion (220), a second clip portion (230), a third clip portion (240)

Claims (14)

The cover-
A backlight unit mounted on the cover bottom, the backlight unit including a light guide plate, an LED assembly disposed on one side of the light guide plate, and an optical sheet disposed on the light guide plate and having a protrusion including a fixing hole at an edge;
A guide panel assembled with the cover bottom and covering an edge of the backlight unit;
A liquid crystal panel seated on the guide panel;
A cover bottom and a clip for assembling and fastening the optical sheet and the cover bottom and the guide panel,
/ RTI >
Wherein the clip comprises a first clip portion, a second clip portion perpendicular to the first clip portion, and a third clip portion perpendicular to the second clip portion and facing the first clip portion,
A clip hole is formed on a side surface of the guide panel corresponding to the engaging portion,
Wherein the first clip portion is inserted through the clip hole and the fixing hole, and the third clip portion surrounds a part of the backside of the cover bottom.
delete The method according to claim 1,
And an end of the third clip portion is formed with a hooked end bent toward the first clip portion.
The method according to claim 1,
And the protruding portion of the optical sheet is bent downward perpendicularly to the optical sheet so that the fixing hole corresponds to the clip hole.
delete The method according to claim 1,
Wherein the latching portion is located at a first step where the side face of the cover bottom is recessed inward from the outer side face.
The method according to claim 1,
Wherein the clip hole is located at a second step where the side surface of the guide panel is recessed inward from the outer side surface.
The method according to claim 1,
Wherein a length of the first clip portion is longer than a width of a side surface of the guide panel, and a width of the first clip portion corresponds to a width of the clip hole and the fixing hole.
5. The method of claim 4,
Wherein a folding line is formed at an edge of the optical sheet where the protrusion is formed.
5. The method of claim 4,
Wherein the optical sheet is fixed via a sheet fixing tape, and the sheet fixing tape includes a first hole corresponding to the fixing hole formed in the protruding portion bent downward perpendicularly to the optical sheet.
11. The method of claim 10,
Wherein the sheet fixing tape is attached so as to surround a part of the upper surface of the optical sheet and a part of the backside of the cover bottom, and a plurality of second holes are formed on the sheet fixing tape attached to a part of the upper surface of the optical sheet.
The method according to claim 1,
And the end of the first clip unit is round processed.
The method according to claim 1,
And a pad is provided on the inner side of the second clip portion and the third clip portion.
The method according to claim 1,
Wherein at least two of the clips are spaced apart from each other by a predetermined distance along one edge of the cover bottom or the guide panel.

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