KR20130062119A - Guide panel and liquid crystal display having thereof - Google Patents

Abstract

PURPOSE: A guide panel and a liquid crystal display including the same are provided to reduce points where a residual stress occurs by forming the junction surface between a first and second frame into a trapezoidal shape, thereby preventing the distortion of the guide panel. CONSTITUTION: A first frame(131) which has a rectangular frame shape is formed with light absorbing material. A second frame(132) which has a rectangular frame shape is joined with the inside of the first frame. The second frame is formed with a light reflecting material. The junction surfaces between the first and the second frame have various trapezoidal shapes.

Description

Guide panel and liquid crystal display including the same

Embodiments of the present invention relate to a guide panel and a liquid crystal display device, and more particularly, to a guide panel and a liquid crystal display device for preventing the bending of the guide panel, to ensure improved product mass production.

Recently, due to the rapid development of technology in the semiconductor industry, liquid crystal display devices are being manufactured with smaller and lighter weight and more powerful products. The LCD has been attracting attention as an alternative means of overcoming the shortcomings of the CRT due to its advantages such as miniaturization, light weight, and low power consumption, and is currently installed in almost all information processing devices requiring a display device. It's happening.

The LCD is divided into a liquid crystal panel, a guide panel, a backlight unit, a driving circuit unit, a top cover, and a cover bottom.

The liquid crystal panel receives light from a lower surface to implement an image, and the backlight unit serves to supply light to the liquid crystal panel. In this case, the backlight unit (not shown) is composed of a LED for supplying light, a printed circuit board (PCB), a light guide plate, a reflective sheet, and a plurality of optical sheets. The guide panel supports the liquid crystal panel at an edge of the rear surface of the liquid crystal panel and guides the side of the liquid crystal panel to fix the liquid crystal panel. The top cover covers the front edge of the liquid crystal panel, and the top cover accommodates the backlight unit. And to cover the back of the backlight unit.

In this case, the guide panel may be formed of a metal material or a plastic material, and may be formed in a shape of which the center is opened. Hereinafter, the structure of the guide panel will be described in detail with reference to FIG. 1.

1 is a perspective view of a guide panel according to the prior art.

The guide panel is composed of the joining of the first frame 31 and the second frame 32.

The first frame 31 and the second frame 32 are formed in a rectangular frame shape. In this case, the first frame 31 formed of black resin supports the outer portion of the LCD module, and the second frame 32 formed of white resin is formed stepwise so that the area having a low height is an edge of the liquid crystal panel. Support. In order to implement such a shape more easily, the guide panel 30 may be typically manufactured by injection molding.

The above-described injection molding method is a method of preparing a mold according to the mold by preparing a mold, which mimics the outer shape of the guide panel, and injecting raw materials of plastic resin series between at least two cores. In the manufacture of the guide panel, first, the first frame 31 of the guide panel is formed using black resin, and the second frame 32 is formed using the white resin inside the formed first frame 31. Is formed to bond the second frame 32 to the inner surface of the first frame 31. However, since the guide panel has a straight shape and a small thickness, the first frame 31 and the second frame 32 may be easily separated (D) due to other factors such as an impact applied from the outside. have.

Thus, the guide panel 30 was manufactured to increase the bonding area of the first frame 31 and the second frame 32 to improve the bonding force.

2 is a plan view of a guide panel 30 of a zigzag bonded structure according to the prior art.

The joining surface of the second frame 32 and the first frame 31 of the guide panel 30 may have a shape in which a rectangular concave-convex shape is arranged in a zigzag. At this time, while the bonding surface of the guide panel 30 shown in FIG. 1 has a straight structure, the bonding surface of the guide panel 30 of the zigzag bonding structure shown in FIG. The joint area is wider than the guide panel 30 of. Therefore, the bonding force between the first frame 31 and the second frame 32 can be further improved than the guide panel 30 of FIG. 1.

However, the guide panel 30 of such a zigzag bonding structure may be a part of the guide panel 30 is bent.

3A is a side photograph of a guide panel of a zigzag bonding structure.

Looking at the guide panel in the red ellipse in the above picture, the side of the rectangular-shaped guide panel is floating from the bottom to the top, the shadow is reflected on the bottom surface. Thus, it can be seen that the side in the ellipse is curved compared to the other side.

In addition, since the concave-convex shape is a rectangular shape and each corner has an angle of 90 degrees, the resin is injected into the mold at a high injection pressure to form a guide panel seamless to the corner region.

On the other hand, the mold injection device injects resin using a resin injection passage called sprue and solidifies the resin in the cavity to form a product. When the injection pressure becomes too large, the mold as well as the soup The resin solidified to the base area, and the product released from the mold injection device may appear as a defect as shown in the photo below.

Figure 3b is a photograph showing the sprue push phenomenon.

The portion protruding upward in the photo is the sprue region into which the resin is injected. That is, the release product as described above may have a shape formed by extending from the target specification to the sprue region without being manufactured to the target specification in the injection mold.

Therefore, the guide panel of the zigzag joining structure has the advantage of improving the bonding force, but the defects as described above may occur, there was a problem that mass production is not good.

Therefore, in order to solve the above problems, embodiments of the present invention by making the concave-convex shape of the surface joined by the first frame and the second frame to a trapezoidal shape, by reducing the possible stress generation point at the joint surface, The purpose is to produce a guide panel without bending.

In addition, other objects and features of the present invention will be described in the description and claims for carrying out the invention described below.

In order to achieve the above object of the present invention, the guide panel according to an embodiment of the present invention has a rectangular frame shape, the first frame formed of a material for absorbing light; And a second frame having a rectangular frame shape and bonded to an inner surface of the first frame and formed of a material that reflects light, wherein the bonding surface of the first frame and the second frame has a plurality of trapezoidal shapes. It is characterized by being formed.

Preferably, the joining surface is characterized in that the plurality of trapezoidal shape is formed in a fingered shape.

In addition, the side of the trapezoidal shape parallel to the outer surface of the first frame is characterized in that the length is longer than two opposite sides having a slope with respect to the side parallel to the outer surface of the first frame.

In addition, the inclined angle of the two opposite sides parallel to the outer surface of the first frame in the trapezoidal shape is characterized in that greater than 90 degrees.

In addition, the first frame is formed of a black resin, the second frame is characterized in that the white resin.

In addition, the first frame and the second frame is characterized in that formed and joined by double injection.

In addition, the guide panel thickness direction shape of the joining surface is bent, the first frame and the second frame is characterized in that the joining in contact with each other on at least two surfaces in the thickness direction of the guide panel.

In addition, the bent shape of the joining surface is characterized in that the "b" or "b" shape.

On the other hand, the liquid crystal display device according to another embodiment of the present invention comprises a liquid crystal panel for displaying an image on the front; A guide panel supporting an edge of the liquid crystal panel and comprising a first frame formed of black resin and a second frame bonded to an inner surface of the first frame and formed of white resin; A backlight unit emitting light from the rear surface of the liquid crystal panel to an upper portion thereof; And a bottom cover accommodating the backlight unit and fastened to the guide panel, wherein a joining surface of the first frame and the second frame is formed in a plurality of trapezoidal shapes.

Preferably, the joining surface is characterized in that the plurality of trapezoidal shape is formed in a fingered shape.

In addition, the side of the trapezoidal shape parallel to the outer surface of the first frame is characterized in that the length is longer than two opposite sides having a slope with respect to the side parallel to the outer surface of the first frame.

In addition, the guide panel thickness direction shape of the joining surface is bent, the first frame and the second frame is characterized in that the joining in contact with each other on at least two surfaces in the thickness direction of the guide panel.

In addition, the bent shape of the joining surface is characterized in that the "b" or "b" shape.

Guide panel and liquid crystal display device according to at least one embodiment of the present invention configured as described above,

The joint surface of the first frame and the second frame has a trapezoidal shape, thereby reducing the occurrence of residual stress in the guide panel structure, thereby preventing bending of the guide panel and removing other defects. Therefore, product mass productivity can be improved by reducing defects of a guide panel.

In addition, it is possible to further improve the joining force between the first frame and the second frame by further increasing the joining area by making the cross section of the surface joined between the first frame and the second frame bent.

1 is a perspective view of a guide panel of a linear bonded structure according to the prior art.
2 is a plan view of a guide panel of a zigzag bonded structure according to the prior art.
3A is a side photograph of a guide panel of a zigzag bonding structure.
Figure 3b is a photograph showing the sprue push phenomenon.
4 is an exploded perspective view of a liquid crystal display according to a first embodiment of the present invention.
5A is a plan view of a guide panel according to a first embodiment of the present invention.
5B is a cross-sectional view taken along the line C1 of FIG. 5A.
5C is an enlarged plan view of the bonding surface of the guide panel according to the first embodiment of the present invention.
Fig. 5D is a schematic diagram showing the difference in molecular orientation in injection molding.
6A is a plan view of the guide panel according to the first embodiment of the present invention.
6B is a side view of the guide panel according to the first embodiment of the present invention.
7 is a table for explaining the size of the first embodiment of the present invention.
8A and 8B are cross-sectional views of a guide panel according to a second embodiment of the present invention.

Hereinafter, a guide panel and a liquid crystal display device according to an embodiment of the present invention will be described in detail with reference to the drawings.

In the present specification, the same reference numerals are given to the same components in different embodiments, and the description thereof is replaced with the first explanation.

As used herein, the singular forms "a", "an" and "the" include plural referents unless the context clearly dictates otherwise.

In addition, it should be considered that elements of the drawings attached to the present specification may be enlarged or reduced for convenience of description.

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

As shown in FIG. 4, the liquid crystal display device 100 according to the first exemplary embodiment of the present invention is connected to a liquid crystal panel 110 on which an image is displayed and to one side of the liquid crystal panel 110. The driving circuit unit 117 for driving the backlight unit 120 is disposed on the rear surface of the liquid crystal panel 110 to irradiate light to the liquid crystal panel 110.

The liquid crystal panel 110 plays a key role in image expression. The liquid crystal panel 110 is a thin film transistor (TFT) substrate 111 and a color filter substrate bonded to each other with a liquid crystal layer interposed therebetween. (113).

At this time, the upper and lower outer surfaces of the two substrates 111 and 113 may be attached to polarizers (not shown) for selectively transmitting only specific light.

In addition, the liquid crystal panel 110 has a circuit board 117 connected to at least one edge through a connecting member 116 such as a flexible circuit board or a tape carrier package (TCP). 117 is in close contact with the side of the guide panel 130 or the cover bottom 140 in the modular process as appropriate. Alternatively, the circuit board 117 may be embedded in the upper side of the liquid crystal panel 110 in the form of chip on glass (COG).

When a thin film transistor (not shown) selected for each gate line is turned on by an on / off signal of a gate driving circuit (not shown) transmitted to the liquid crystal panel 110, the data driving circuit (not shown) is turned on. Signal voltage is transmitted to the corresponding pixel electrode (not shown) through the data line (not shown), and the arrangement of the liquid crystal molecules by the electric field between the pixel electrode (not shown) and the common electrode (not shown) The direction is changed so that light having a different transmittance for each pixel passes through the liquid crystal layer. The light passing through the liquid crystal layer is filtered through a plurality of colors through the color filter substrate 113, and the plurality of colors may be combined to represent an image.

On the other hand, the backlight unit 120 is located on the back of the liquid crystal panel 110, is formed on the back of the liquid crystal panel 110, the optical sheet 125 for diffusing and condensing light, and the optical sheet 125 A light guide plate 124 disposed on a rear surface of the light guide plate, a reflective sheet 123 provided on a rear surface of the light guide plate 124, and an LED assembly 121 and an LED assembly 121 that emit light along at least one side of the light guide plate 124. LED housing 122 is mounted.

The optical sheet 125 disposed parallel to the rear surface of the liquid crystal panel 110 includes a diffusion sheet (not shown), a prism sheet (not shown), and a protective sheet (not shown) sequentially stacked from the bottom. The diffusion sheet serves to diffuse the light from the LED assembly 121 and supply it to the liquid crystal panel 110. In addition, the prism sheet allows the light passing through the diffusion sheet to proceed vertically to improve brightness, and the protective sheet protects the diffusion sheet and the prism sheet which are sensitive to dust and scratches.

A light guide plate 124 is disposed below the optical sheet 125, and the light guide plate 124 converts a point light source flowing from the LED assembly 121 into a surface light source through total reflection, diffuse reflection, diffusion, and the like. The surface light source may be emitted to the upper and lower portions of the light guide plate 124.

The light guide plate 124 may be a wedge type light guide plate 124, and the wedge type light guide plate 124 is mainly used as a component of a small LCD module. The wedge-shaped light guide plate 124 forms a step so that the light incident part 124a adjacent to the LED assembly is higher than another area to provide a space for loading the plurality of optical sheets 125, and the step is formed in another area where the step is low. There is an advantage that the product can be made slim by loading a plurality of optical sheets (125).

The light guide plate 124 may be mainly formed of any one of polymethyl metacrylate (PMMA), polyethylene terephthlate (PET), polycarbonate (PC), and polyethylene naphthalate (PEN).

The reflective sheet 123 is disposed under the light guide plate 124. The reflective sheet 123 reflects the light emitted downward from the light guide plate 124 back to the top, thereby reducing the light loss. The reflective sheet 123 may be formed of a material such as polyethylene terephthlate (PET) or polycarbonate (PC).

The LED assembly 121 may be disposed on at least one side of the light guide plate 124. The LED assembly 121 includes an LED 121a and a printed circuit board 121b.

The LED 121a is a device that emits light, and the LED 121a is mounted with a small chip that emits monochromatic light such as blue, red, and green. Accordingly, the LED 121a may emit a single color light by disposing a plurality of LEDs 121a emitting the same wavelength, or may emit white light by combining the LEDs 121a including all the blue, green, and red wavelengths. .

At this time, the LED 121a may be in the form of an LED 121a package having a structure in which a small chip is embedded in a mold frame. In addition, the LEDs 121a may be formed to be spaced apart from each other by a predetermined interval.

The printed circuit board 121b applies an electrical signal to the LED 121a and mounts the LED 121a on the front surface of the printed circuit board 121b. At this time, the printed circuit board 121b has a wiring for driving the LED 121a on the front surface, and the rear surface of the printed circuit board 121b is for dissipating heat generated from the LED 121a to the outside. It can be made with aluminum (Al) which is excellent in heat transfer rate as a main material.

Although not shown in the drawings, an LED housing (not shown) may be disposed to mount the LED assembly 121 at the rear of the LED assembly 121 and to dissipate heat of the LED assembly 121 to the outside. have.

The reflective sheet 123 is disposed on the rear surface of the light guide plate 124, and reflects light emitted downward from the light guide plate 124 to the top to reduce light loss of the backlight unit 120.

In addition, a guide panel 130 covering the edge of the liquid crystal panel 110 and supporting and protecting the liquid crystal panel 110 from the rear surface of the liquid crystal panel 110 may be formed of the liquid crystal panel 110 and the backlight unit 120. The cover bottom 140 is disposed between the reflective sheet 123, the LED assembly 121, the light guide plate 124, and the plurality of optical sheets 125, and is disposed on the rear surface of the reflective sheet 123. Can be. In this case, the cover bottom 140 and the guide panel 130 may be fastened to each other, and a top cover (not shown) is disposed on the upper portion of the liquid crystal panel 110 to cover the cover bottom 140 and the guide panel 130. It can also be combined with.

Here, the guide panel 130 is composed of a first frame 131 and a second frame 132, the first frame 131 is disposed on the outside, the second frame 132 is disposed on the inside of the first frame ( The inner surface of the 131 and the outer surface of the second frame 132 may be bonded to each other.

Such a guide panel may be formed in a double injection method. In the double injection method, two molds (or resins having different colors) are applied to one part to be injected and then two molds are integrally installed in the injection molding machine. The secondary resin is injected into the cavity of the secondary mold and the space of the primary molded product by rotating the mold 180 degrees so that the molded product can be secondary molded. That is, the guide panel first flows the resin for forming the first frame 131 into the primary mold and solidifies it, and then rotates the mold by 180 degrees to form a second cavity in the cavity of the secondary mold and the first frame 131. The resin for forming the frame 132 may be introduced to form an outer surface of the second frame 132 to be bonded to an inner surface of the first frame 131.

Hereinafter, the configuration of the guide panel according to the first embodiment of the present invention will be described in more detail.

5A is a plan view of a guide panel according to a first embodiment of the present invention, and FIG. 5B is a cross-sectional view taken along line C1 of FIG. 5A.

Guide panel 130 according to the first embodiment of the present invention is composed of a first frame 131 and a second frame 132, the first frame 131 is a resin of a color for absorbing light (resin) The second frame 132 may be formed of a resin having a color for reflecting light. Preferably, the first frame 131 may be formed of black resin, and the second frame 132 may be formed of white resin.

In this case, when the liquid crystal display device is assembled, the first frame 131 absorbs light leaking to the outside of the guide panel 130 so that the aesthetics caused by light leakage are not broken, and the second frame 132 ) Reflects the light directed toward the guide panel 130 from the light guide plate and the light source of the backlight unit, thereby reducing the light loss of the liquid crystal display itself.

Meanwhile, both the first frame 131 and the second frame 132 may be formed in a rectangular frame having an open center, and the second frame 132 may include a support part 132b supporting the liquid crystal panel. It may be composed of a guide portion (132a) for guiding and protecting the side of the liquid crystal panel.

In this case, referring to FIG. 5B, the support part 132b may protrude from one region of the guide part 132a, and the guide part 132a may have a height higher than that of the support part 132b.

The guide panel 130 may include a plurality of protrusions (not shown) on one side of the support part 132b on the inner surface of the rectangular frame. The protrusion is a region corresponding to the region where the LED assembly is disposed in the backlight unit, and is engaged with the LED assembly or disposed on the top of the LED assembly so that the LED is arranged at a desired position, thereby aligning the LED assembly.

Meanwhile, the bonding surface F of the first frame 131 and the second frame 132 may be formed in a plurality of neighboring trapezoidal shapes.

The trapezoidal arrangement may have a shape in which neighboring trapezoidal shapes face each other in opposite directions and are fingered while the arrangements are staggered.

The bonding area can be widened through the fingering shape, and the arrangement of the trapezoidal shape can form a joint surface (F) area almost equivalent to the structure in which the uneven shape of the prior art is zigzag bonded, and thus, the conventional zigzag bonding structure. It can maintain the bonding force equivalent to the technology.

And the arrangement of the trapezoidal shape of the side facing from the guide panel 130 may be symmetric with each other.

Here, the trapezoidal shape will be described in more detail with reference to FIGS. 5C and 5D. FIG. 5C is an enlarged plan view of the bonding surface of the guide panel according to the first embodiment of the present invention, and FIG. 5D is a schematic view for illustrating a difference in molecular orientation in injection molding.

The trapezoidal shape may be a shape of a curved line segment in which a longest side of two parallel sides is omitted in a trapezoid that is not a trapezoid consisting of four sides. In this case, the trapezoidal shape may be formed of two sides (F2) facing each other with a predetermined slope with respect to the long side (F1) and the long side (F1). In this case, the long side F1 may be parallel to the outer surface of the first frame 131, and may have a length longer than the two opposite sides F2. For this reason, since the first frame 131 and the second frame 132 are bonded at each side, the bonding force is improved when the lateral area of the first frame 131 and the second frame 132 is wider. Because.

The inclined angle θ of two opposite sides F2 with respect to the long side F1 may be equal to or greater than 90 °.

Before explaining the reason why θ is 90 kΩ or more, how the warpage phenomenon occurs in the prior art will be described first.

The reason why the warpage phenomenon occurs in the prior art of the zigzag joining structure examined in FIG. 2 is due to residual stress due to the difference in shrinkage of the material due to the shape of the joining surface F of the guide panel 130. Residual stress refers to the stress remaining in the material even after all external forces are removed after the material is deformed due to non-uniform deformation.

In this case, the shrinkage rate difference may occur due to a temperature difference of the mold surface into which the resin is introduced or a difference in the orientation direction of the resin introduced into the mold.

Here, the orientation direction of the material means that when the resin is injected into the mold, there is a difference in the flow of the resin in the mold and the flow of the resin at the cavity wall surface, so that shear stress is applied and the molecules of the resin are caused by the shear force. Refers to the arrangement direction of molecules that are arranged side by side in the direction of shear force.

Referring to Figure 5d in detail, when the resin is introduced into the cavity (C) from the injection machine, the cavity (C) wall area (A) is cooled from the wall of the mold, so that the orientation of the molecules is long and the cavity (C) The inner central region (B) has a faster flow of resin, resulting in a shorter molecular orientation. At this time, the cavity (C) wall region (A) and the central region (B) inside the cavity (C) is a difference in the orientation of the molecules. Shrinkage of the molded article may occur when the molecules of the resin are relieved in the cooling process and try to return to their original state.

Therefore, the distribution of the orientation direction is the flow velocity of the resin flowing along the curved portion of the mold and the central region inside the cavity (C) when the curved portion of the mold has a large angle difference with respect to the direction in which the resin is introduced into the mold Since the flow rate difference of resin of (B) becomes remarkable, the orientation difference of a molecule | numerator may appear large. Therefore, the difference in the shrinkage ratio of the resin is increased in the region where the bent portion of the mold is large, and residual stress may occur in the molded article formed according to the shape of the bent portion. Therefore, in the case of the zigzag joining structure of the prior art, the shape of the joining surface F is bent vertically, and warpage was easy to occur.

However, in the first embodiment of the present invention, the inclination angle θ of the two sides F2 facing each other in the trapezoid is greater than 90 °, thereby smoothing the bent portion of the mold corresponding to the trapezoid with respect to the injection direction of the resin. The points where residual stress may occur in the first frame 131 and the second frame 132 may be removed. Accordingly, the guide panel 130 may be manufactured without bending.

6A is a planar photograph of the guide panel according to the first embodiment of the present invention, and FIG. 6B is a side photograph of the guide panel according to the first embodiment of the present invention.

Referring to FIG. 6A, it can be seen that the rectangular-shaped guide panel includes a first frame and a second frame, and a joint surface of the two frames has a trapezoidal shape.

6B, it can be seen that unlike FIG. 3A, the first embodiment of the present invention can be manufactured with a uniform guide panel having no lateral bending.

Hereinafter, the standard of the guide panel according to the first embodiment of the present invention will be described. 7 is a table for explaining the standard of the first embodiment of the present invention.

7 shows numerical values for describing the outer size, the inner size, and the thickness of the guide panel shown in FIG. 5A.

a1 to a4 denote the outer size of the guide panel, b1 to b4 denote the inner size of the guide panel, and c1 to c3 denote the thickness measuring point of the guide panel.

a1 and a2 are the outer lengths of opposite short sides, and the nominal value was measured equally with 54.52mm, and the average value was measured with the same value with 54.53mm and 54.54mm, respectively. And a3 and a4 are the outer lengths of the opposing long sides, and the nominal value is the same as 96.86mm, and the average value is measured to be almost the same as 96.88mm and 96.87mm.

b1 and b2 were the median lengths of opposite short sides, and the nominal value was measured to be the same with 54.22mm, and the average value was measured to be almost the same with 54.25mm and 54.26mm, respectively. B3 and b4 are the inner lengths of opposite long sides, and the nominal value is the same as 95.96mm, and the average value is almost the same as 95.98mm and 95.99mm.

On the other hand, c1 ~ c3 measured the thickness of the long side at regular intervals, the nominal value was all the same as 0.755mm, the average was measured to be almost the same as 0.76mm or 0.77mm.

The size of the guide panel examined above was measured the same length of the sides facing each other, the thickness was also the same on one side. Therefore, it can be seen that the guide panel of the first embodiment can be manufactured as a uniform product without bending. And the capability index is the ability to achieve the quality the process can produce when the process is under control (stable) under certain conditions, which can be expressed as a CPK. [Source] | Author

According to the first embodiment of the present invention, a processability index (CPK) obtained by using a nominal value, a standard deviation, and an average value is measured at each position in the range of 1.05 to 1.53. The panel can have a stable process capability.

Hereinafter, a guide panel according to a second embodiment of the present invention will be described.

8A and 8B are cross-sectional views of a guide panel according to a second embodiment of the present invention.

The guide panel 230 according to the second embodiment of the present invention has a shape in which the joint surface of the first frame 231 and the second frame 232 is bent, and the thickness direction of the guide panel 230 of the joint surface is bent. The shape is bent so that the first frame 231 and the second frame 232 as shown in Figure 5b is not in contact with one surface, but in contact with each other on two or more surfaces are characterized in that the bonding.

Referring to FIG. 8A, the shape of the thickness direction of the guide panel 230 of the bonding surface of the first frame 231 and the second frame 232 may be bent into a “b” shape. In this case, the bent outer surface of the second frame 232 may be bonded to the bent inner surface of the first frame 231. Therefore, the lower surface of the support portion 232b of the second frame 232 and the side surface of the guide portion 232a, that is, two surfaces in total, may be contacted and bonded to the inner surface of the first frame 231.

On the other hand, referring to Figure 8b, the guide panel 230 thickness direction shape of the bonding surface may be a bent shape is connected "b" shape and "b" shape. Here, the first frame 231 may be formed to be bent in a "ㅗ" shape, and the second frame 232 may be formed to be bent in a "a" shape. In this case, the bent outer surface of the second frame 232 may be bonded to the bent inner surface of the first frame 231. Unlike FIG. 8A, the protrusion 232c may extend in the direction of the first frame 231 at the lower end of the outer surface of the second frame 232. In addition, the surface on which the first frame 231 and the second frame 232 are bonded may be formed on the side surface of the guide portion 232a of the second frame 232, the upper surface of the protrusion 232c, and the protrusion 232c. There may be three sides in total.

As such, the first frame 231 and the second frame 232 are formed at two or more surfaces by bending the guide panel 230 in the thickness direction of the joint surface of the first frame 231 and the second frame 232. The contact area can be made larger than in the first embodiment by making contact. Therefore, the bonding effect can be further improved than in the first embodiment.

On the other hand, since the second embodiment of the present invention has an effect of improving the joining effect, even if the shape of the joining surface is not a trapezoid like the first embodiment but various other polygons, curves and straight lines as an embodiment of the present invention Include.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments.

Therefore, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concept of the present invention defined in the following claims are also within the scope of the present invention.

100 liquid crystal display device 110 liquid crystal panel
120: backlight unit 130, 230: guide panel
131, 231: first frame 132, 232: second frame
132a, 232a: guide part 132b, 232b: support part

Claims (13)

A first frame having a rectangular frame shape and formed of a material absorbing light; And
And a second frame having a rectangular frame shape and bonded to an inner surface of the first frame and formed of a material that reflects light.
Guide panel, characterized in that the joining surface of the first frame and the second frame is formed in a plurality of trapezoidal shape. The method of claim 1,
The joining surface is a guide panel, characterized in that formed in a plurality of trapezoidal shape is fingered. 3. The method of claim 2,
In the trapezoidal shape, the side parallel to the outer surface of the first frame is a guide panel, characterized in that the length is longer than the two opposite sides having a slope with respect to the side parallel to the outer surface of the first frame. The method of claim 3, wherein
And the inclined angle of the two opposite sides of the trapezoidal shape parallel to the outer surface of the first frame is greater than 90 °. The method of claim 1,
The first frame is formed of a black resin, the second frame is a guide panel, characterized in that formed of white resin. The method of claim 1,
The first frame and the second frame is a guide panel, characterized in that formed and joined by double injection. The method of claim 1,
The guide panel thickness direction shape of the said joining surface is bent, The guide panel characterized in that the first frame and the second frame are bonded to each other in contact with at least two surfaces in the thickness direction of the guide panel. The method of claim 7, wherein
Guide panel, characterized in that the bent shape of the junction surface "" a "or" b "shape. A liquid crystal panel displaying an image on the front surface;
A guide panel supporting an edge of the liquid crystal panel and comprising a first frame formed of black resin and a second frame bonded to an inner surface of the first frame and formed of white resin;
A backlight unit emitting light from the rear surface of the liquid crystal panel to an upper portion thereof; And
A bottom cover configured to receive the backlight unit and to be coupled to the guide panel;
The bonding surface of the first frame and the second frame is formed in a plurality of trapezoidal shape. The method of claim 9,
And the bonding surface has a plurality of trapezoidal shapes that are fingered. The method of claim 9,
And a side parallel to the outer side of the first frame in the trapezoidal shape is longer than two opposite sides having a slope with respect to the side parallel to the outer side of the first frame. The method of claim 9,
The guide panel thickness direction shape of the bonding surface is bent, and the first frame and the second frame are bonded to each other in contact with each other in two or more surfaces in the thickness direction of the guide panel. 13. The method of claim 12,
The bent shape of the bonding surface is a "b" or "b" shape characterized in that the liquid crystal display device.

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