KR102490163B1 - Guide panel, cover bottom and display device having the same - Google Patents

Abstract

The present embodiments disclose a guide panel, a cover bottom, and a display device including the same. The disclosed guide panel, cover bottom, and display device including the same include a cover bottom having a multi-bending structure, including a support part and at least one groove on upper and lower surfaces of the guide panel, respectively. Through this, a guide panel, a cover bottom, and a display device including the guide panel, which can prevent bending of the cover bottom to which the guide panel is fastened and reduce manufacturing costs, are provided.

Description

Guide panel, cover bottom and display device including the same {GUIDE PANEL, COVER BOTTOM AND DISPLAY DEVICE HAVING THE SAME}

The present embodiments relate to a guide panel, a cover bottom, and a display device including the same.

In recent years, liquid crystal display devices have become smaller and lighter due to the technological development of the semiconductor industry, which has undergone rapid development, and products with more powerful performance are being produced. Liquid crystal display devices have advantages such as miniaturization, light weight, and low power consumption, so they have gradually attracted attention as an alternative means that can overcome the disadvantages of CRT. There is a situation.

A liquid crystal display device is largely divided into a display panel, a guide panel, a backlight unit, a driving circuit unit, a top cover, and a cover bottom.

The display panel serves to implement an image by receiving light from the lower surface, and the backlight unit serves to supply light to the display panel. At this time, the backlight unit is composed of a light source for supplying light, a printed circuit board (PCB), a light guide plate, a reflective sheet, and a plurality of optical sheets. Further, the guide panel supports the display panel at the edge of the rear surface of the display panel and guides the side surface of the display panel to fix the display panel. In addition, the top cover covers the front edge of the display panel, and the top cover serves to accommodate the backlight unit and cover the rear surface of the backlight unit.

At this time, the guide panel may be formed of a metal material or a plastic material, and may be manufactured by an injection molding method. The above-described injection molding method is a method of manufacturing a guide panel according to a mold by preparing a mold that mimics the outer shape of the guide panel and injecting a plastic resin-based raw material between at least two upper and lower cores.

On the other hand, when the resin flows into the mold from the injection molding machine, cooling is performed from the wall surface of the mold, so the molecular orientation is prolonged, and the flow of the resin in the central region of the mold is fast, so the molecular orientation is shortened. At this time, a difference occurs in the orientation of molecules between the mold wall area and the central area inside the mold.

Here, shrinkage of the molded product may occur when the molecules of the resin try to return to their original state after the orientation is relaxed during the cooling process. In addition, even after injection of the resin, shrinkage of the molded article, that is, the guide panel, may occur due to a temperature difference between the central region of the resin and the outer region of the resin. In addition, as shrinkage occurs while the guide panel is cooled after injection, the cover bottom to which the guide panel is fastened may also be deformed.

As described above, when warpage occurs in the guide panel and the cover bottom to which the guide panel is fastened, the flatness of the product deteriorates. This is pointed out as a major problem that causes panel interference to cause light leakage.

The present embodiments are intended to solve the above problems, by changing the shape of the guide panel and the cover bottom to suppress shrinkage when the guide panel is ejected, to improve the rigidity of the cover bottom, and to deform the cover bottom to which the guide panel is fastened. It is intended to provide a guide panel, a cover bottom, and a display device including the same that can suppress the

A guide panel, a cover bottom, and a display device including the guide panel according to an embodiment include a first support part supporting a part of the display panel. Further, a guide panel, a cover bottom, and a display device including the guide panel according to an embodiment include at least one first groove provided on the same surface as the first support part. Also, a guide panel, a cover bottom, and a display device including the guide panel according to an embodiment include at least one second groove provided on a surface opposite to the first support part. In addition, a guide panel, a cover bottom, and a display device including the guide panel according to an embodiment include a second support provided on the same surface as the second groove. Here, the first groove and the second groove are grooves surrounded by a first surface, a second surface, and a third surface, respectively, and the first surfaces of the first groove and the second groove extend in a horizontal direction, and at least one of the grooves The second and third surfaces may have a predetermined inclination relative to the horizontal direction.

In addition, a guide panel, a cover bottom, and a display device including the guide panel according to another embodiment include a rectangular cover bottom. Here, the rectangular cover bottom includes a first area and a second area extending in a horizontal direction, and a third area connected to one end of each of the first area and the second area and extending in a vertical direction. 1 Includes cover bottom. In addition, the rectangular cover bottom includes a second cover bottom composed of a fourth area extending in a horizontal direction and a fifth area connected to one end of the fourth area and extending in a vertical direction. Here, on at least one side of the cover bottom according to another embodiment, the first cover bottom and the second cover bottom may be spaced apart from each other.

In addition, a guide panel, a cover bottom, and a display device including the guide panel according to another embodiment include a display panel. Further, a guide panel, a cover bottom, and a display device including the guide panel according to another embodiment include an optical sheet, a light guide plate, and a reflector disposed on a rear surface of the display panel. Further, a guide panel, a cover bottom, and a display device including the guide panel according to another embodiment include a light source assembly disposed on at least one side of a light guide plate. Further, a guide panel, a cover bottom, and a display device including the guide panel according to another embodiment include a guide panel that encloses the display panel and supports the display panel. In addition, a guide panel, a cover bottom, and a display device including the guide panel according to another embodiment include a cover bottom fastened to the guide panel and composed of first and second cover bottoms. Here, the guide panel includes a first support portion supporting a portion of the display panel, at least one first groove provided on the same surface as the first support portion, a second support portion provided on the opposite side of the first support portion, and at least one groove. It includes a second groove, the first groove and the second groove are grooves surrounded by the first surface, the second surface, and the third surface, respectively, and the first surface of at least one of the first groove and the second groove is horizontal. direction, and the second and third surfaces may have a predetermined inclination relative to the horizontal direction.

A guide panel, a cover bottom, and a display device including the guide panel according to the present embodiments include a support part and at least one groove on the upper and lower surfaces of the guide panel, thereby reducing the cross-sectional area of the guide panel, suppressing shrinkage during injection, and reducing manufacturing cost. has the effect of reducing

In addition, a guide panel, a cover bottom, and a display device including the guide panel according to the present embodiments include first and second cover bottoms formed in 'a' or 'b' shapes on at least one side of the cover bottom, so that the cover bottom Rigidity can be improved by increasing the value of the moment of inertia of section, and thus, there is an effect of suppressing a phenomenon in which the cover bottom is deformed together due to shrinkage during cooling of the guide panel.

1 is an exploded perspective view schematically showing the structure of a display device according to the present exemplary embodiments.
2 is a plan view of a cover bottom according to the present embodiment.
3 is a cross-sectional view taken along YZ of FIG. 2;
4 is a plan view showing parts of a cover bottom and a guide panel according to the present embodiment.
5 is a cross-sectional view taken along LM of FIG. 4;
6 is a cross-sectional view of the guide panel according to the first embodiment.
7 is a cross-sectional view of a guide panel according to a second embodiment.
8 is a cross-sectional view of a guide panel according to a third embodiment.
9 is a plan view showing the rear surface of the cover bottom to which the guide panel according to the present embodiment is fastened.
10 is a view comparing cross-sectional structures of a guide panel and a cover bottom according to a comparative example and an embodiment.
11 is a table comparing the effects of guide panels and cover bottoms according to comparative examples and examples.

Hereinafter, the present embodiments will be described in detail with reference to the drawings. The embodiments introduced below are provided as examples to sufficiently convey the spirit of the present invention to those skilled in the art. Accordingly, the present invention may be embodied in other shapes without being limited to the embodiments described below. And in the drawings, the size and thickness of the device may be exaggerated for convenience. Like reference numbers indicate like elements throughout the specification.

Advantages and features of the present invention, and methods of achieving them, will become clear with reference to the detailed description of the following embodiments taken in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different shapes, only these embodiments make the disclosure of the present invention complete, and common knowledge in the art to which the present invention pertains. It is provided to completely inform the person who has the scope of the invention, and the present invention is only defined by the scope of the claims. Like reference numbers designate like elements throughout the specification. The sizes and relative sizes of layers and regions in the drawings may be exaggerated for clarity of explanation.

When an element or layer is referred to as “on” or “on” another element or layer, it includes both cases where another element or layer is intervening as well as directly on another element or layer. do. On the other hand, when an element is referred to as “directly on” or “directly on”, it indicates that no other element or layer is intervening.

The spatially relative terms "below, beneath", "lower", "above", "upper", etc., refer to one element or component as shown in the drawing. It can be used to easily describe the correlation between and other elements or components. Spatially relative terms should be understood as terms that include different orientations of elements in use or operation in addition to the directions shown in the figures. For example, when flipping elements shown in the figures, elements described as “below” or “beneath” other elements may be placed “above” the other elements. Thus, the exemplary term “below” may include directions both below and above.

Also, terms such as first, second, A, B, (a), and (b) may be used in describing the components of the present invention. These terms are only used to distinguish the component from other components, and the nature, sequence, order, or number of the corresponding component is not limited by the term.

1 is an exploded perspective view schematically showing the structure of a display device according to the present exemplary embodiments. Referring to FIG. 1 , a display device according to the present exemplary embodiments includes a display panel 610, a driver 620 for driving the display panel 610, and installed on a rear surface of the display panel 610. It includes a backlight unit and a display panel 610 for emitting light over the entire surface of and a guide panel for accommodating and fixing the backlight unit. At this time, at least one driver 600 may be connected to the display panel 610 through a connecting member 621 .

Meanwhile, the display panel 610 according to the present embodiments may be a liquid crystal display panel, and the display panel 610 includes a color filter array substrate 612 and a thin film transistor (TFT) array disposed to face each other. The substrate 611 may be included, and a liquid crystal layer (not shown) interposed between the color filter array substrate 612 and the thin film transistor array substrate 611 may be included.

In the display panel 610 where the color filter array substrate 612 and the thin film transistor array substrate 611 are bonded, a common electrode and a pixel electrode are formed to apply an electric field to the liquid crystal layer, and a voltage is applied to the pixel electrode in a state where a voltage is applied to the common electrode. When the voltage of the data signal applied to the electrode is controlled, the liquid crystal in the liquid crystal layer rotates by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode, thereby transmitting or blocking light for each pixel to display characters or images. .

In addition, a switching element such as a thin film transistor is individually provided in each pixel to control the voltage of the data signal applied to the pixel electrode for each pixel. Upper and lower polarizers (not shown) may be respectively attached to the outside of the display panel 610 configured as described above. The lower polarizer polarizes light passing through the backlight unit, and the upper polarizer polarizes light passing through the display panel 610. polarize the light

In addition, to describe the backlight unit according to the present embodiments in detail, a light source assembly including a light source array 125b generating light is disposed on at least one side of a light guide plate 320, and the light guide plate ( 320), a reflector 410 is disposed on the rear surface, and may include a wavelength conversion sheet 200 disposed on the upper surface of the light guide plate 320 and a plurality of optical sheets 430 disposed on the wavelength conversion sheet 200. there is. Here, the light source may be a light emitting diode (LED), but the present embodiment is not limited thereto. The display panel 610 is seated on the upper part of the backlight unit configured as described above through the guide panel 520, and the display panel 610, the guide panel 520, and the backlight unit are connected to the lower cover bottom 500. They are coupled to each other by an upper case top (not shown) to form a display device.

Meanwhile, the plurality of optical sheets 430 include diffusion sheets and upper and lower prism sheets, and a protective sheet may be further added. The diffusion sheet disperses the light incident from the light guide plate 320 to prevent stains on the image displayed on the display panel 100 due to partial concentration of the light, and the angle of the light incident from the light guide plate 320 to be vertical. refracts

The upper and lower prism sheets collect light incident from the diffusion sheet and uniformly distribute it over the entire surface of the display panel 100 . In addition, the protective sheet may serve to protect the optical sheet 430, which is sensitive to dust or scratches, and prevent movement of the optical sheet 430 when the backlight unit is transported.

In this case, the light source assembly includes a light source array 125b and a light source printed circuit board (PCB) that drives the light source array 125b. On the other hand, the light source is provided in plurality and may be arranged at equal intervals on the light source printed circuit board.

The light source assembly is mounted in the light source housing 120, and the light source housing 120 can prevent light loss by concentrating the light emitted from the plurality of light sources toward the light guide plate 320 as well as protecting the light source assembly. In addition, the light source housing 120 may serve to improve the heat dissipation effect of the light source assembly.

The light emitted from the light source array 125b is incident on the side of the light guide plate 320, and the reflector 410 disposed on the rear surface of the light guide plate 320 reflects the light transmitted to the rear surface of the light guide plate 320. The light is reflected to the upper surface to emit light toward the display panel 100 .

A cover bottom 500 is disposed on the rear surface of the light guide plate 320 . Also, the cover bottom 500 and the guide panel 520 may be coupled to each other. The guide panel 520 surrounds the edge of the display panel 610 and may play a role of supporting and protecting the display panel 610 from the rear surface of the display panel 520 .

Meanwhile, the guide panel 520 may be formed by injection molding. The injection molding method applies two types of resin (or resins of different colors) to one part and injects them. Two molds are installed in an injection molding machine, injection molding is performed on the first mold, and then the first molded product is formed. It is a method of injecting the secondary resin into the space of the primary molded product by rotating the mold 180 degrees so that the secondary molding can be performed.

In general, the guide panel 520 has a shape having a support portion supporting the display panel 610 on one surface. Also, in some cases, a divided structure divided by section may be applied to the guide panel 520 to suppress shrinkage after injection.

However, even when the guide panel 520 is formed in the shape as described above, there is a problem in that the shape deformation of the guide panel 520 occurs, resulting in defective flatness of the product. Specifically, deformation of the shape of the guide panel 520 may occur due to residual stress caused by a difference in contraction rate of the material of the guide panel 520 . Here, the residual stress refers to the stress remaining in the material even when all external forces are removed after the material is deformed due to non-uniform deformation.

At this time, the difference in shrinkage may be caused by a difference in temperature of the surface of the mold into which the resin is introduced or a difference in 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 between the flow of the resin inside the mold and the flow of the resin on the mold wall, and shear stress acts on the resin by the shear stress. It refers to the arrangement direction of the molecules in which the molecules of are arranged side by side in the direction in which the shear stress acts.

Specifically, when the resin flows into the mold from the injection molding machine, cooling is performed from the wall surface of the mold, so the molecular orientation is prolonged, and the flow of the resin is fast in the central region of the mold, so the molecular orientation is shortened. At this time, a difference occurs in the orientation of molecules between the mold wall area and the central area inside the mold. Here, shrinkage of the molded product may occur when the molecules of the resin try to return to their original state after the orientation is relaxed during the cooling process. In addition, even after injection of the resin, shrinkage of the molded article may occur due to a temperature difference between the central region of the resin and the outer region of the resin.

In order to solve this problem, the display device according to the present embodiment reduces the amount of resin used by changing the shape of the guide panel as a method for suppressing deformation of a molded product made through an injection process, that is, a guide panel, and reducing the amount of resin used in the cover bottom. By increasing the moment of inertia of the cross section to improve the rigidity, it is possible to suppress the deformation of the guide panel.

This configuration is reviewed in detail with reference to FIG. 2 as follows. FIG. 2 is a plan view of the cover bottom according to the present embodiment.

Referring to FIG. 2 , the cover bottom 500 according to the present embodiment may be formed in a rectangular shape. Also, the cover bottom 500 may be divided into a first cover bottom 510 and a second cover bottom 515 . Here, the second cover bottom 515 may be disposed outside the first cover bottom 510.

In addition, a separation space 550 may be provided between the first cover bottom 510 and the second cover bottom 515 on at least one side of the cover bottom 500 . Specifically, in the area where the separation space 550 is provided, at least one side of the first cover bottom 510 may be bent in an 'L' shape, and the second cover bottom 515 may be configured in a 'B' shape. there is.

Through this, a separation space 550 may be provided between the first cover bottom 510 and the second cover bottom 515 . A guide panel (not shown) according to the present embodiments may be disposed in the separation space 550 provided between the first cover bottom 510 and the second cover bottom 515 . That is, at least one side of the first cover bottom 510 is bent in an 'a' shape and the second cover bottom 515 is configured in a 'b' shape, so that the guide panel (not shown) according to the present embodiment is seated. A space can be made available.

And, as shown in FIG. 2 , the second cover bottom 515 may be connected to the first cover bottom 510 at the corner area of the cover bottom 500 . Meanwhile, although not shown in the drawing, there is a separation space 550 between the first cover bottom 510 and the second cover bottom 515 on at least one side of the cover bottom corresponding to the area where the light source assembly including a plurality of light sources is disposed. ) may not be provided. Through this, the light source assembly may be stably seated.

Specifically, a light source assembly including a plurality of light sources may be attached to one side of the cover bottom 500 through a thermal conductivity tape. Through this structure, the existing guide panel on the side of the light entrance unit is deleted, so that the light entrance unit can be slimmed down. Meanwhile, the cover bottom may further include a support for supporting the light source assembly in an area corresponding to the area where the light source assembly is disposed, but the present embodiment is not limited thereto.

Also, as shown in FIG. 2 , the central portion X of the first cover bottom 510 may be a blank area in which the member of the first cover bottom 510 does not exist, but the present embodiment is not limited thereto.

Meanwhile, an insertion hole 540 may be further provided in the first cover bottom 510 . At this time, a protrusion (not shown) provided on at least one side of the reflection plate (not shown) may be fastened to the insertion hole 540 . Here, the shape of the insertion hole 540 may be a polygonal shape, for example, a rectangular shape, but the present embodiment is not limited thereto. However, the projections (not shown) of the reflector (not shown) and the insertion hole 540 may have the same shape.

These configurations are reviewed in detail with reference to FIGS. 3 and 4 as follows. 3 is a cross-sectional view taken along line Y-Z of FIG. 2; 4 is a plan view showing parts of a cover bottom and a guide panel according to the present embodiment.

First, referring to FIG. 3, the cover bottom 500 according to the present embodiment is composed of a first cover bottom 510 and a second cover bottom 515, and the first cover bottom 510 and the second cover bottom ( A separation space 550 is provided between 515).

Here, the first cover bottom 510 is composed of a first area 511 , a second area 512 and a third area 513 . Here, the first area 511 and the second area 512 extend in the horizontal direction. Also, the first region 511 and the second region 512 are connected through a third region 513 extending in the vertical direction. Specifically, one end of the first region 511 and one end of the third region 513 are connected, and the other end of the third region 513 is connected to one end of the second region 512. As a result, the first cover bottom 510 can be configured.

At this time, at least one level difference 525 may be provided in the first region 511 of the first cover bottom 510 . Through this, it is possible to prevent a phenomenon in which a reflection plate (not shown) disposed on the cover bottom 500 is pressed.

In addition, the second cover bottom 515 is composed of a fourth area 516 extending in a horizontal direction and a fifth area 517 extending in a vertical direction. Here, the second cover bottom 515 may be formed by connecting one end of the fourth region 516 and one end of the fifth region 517 to each other.

In addition, although not shown in the drawing, the fourth area 516 and the fifth area 517 of the second cover bottom 515 in at least one corner area of the cover bottom 500 are respectively the first cover bottom 510. It may be connected to the first region 511 of and an extension 510a extending in a vertical direction from the first region 511 (see FIG. 2). In this way, the cover bottom 500 according to the present embodiment may be configured.

Meanwhile, the shape in which the second region 512 and the third region 513 of the first cover bottom 510 are connected may be 'L' or 'L' shape. Also, the shape in which the fourth region 516 and the fifth region 517 of the second cover bottom 515 are connected may be 'L' or 'L' shape.

Specifically, when the second area 512 and the third area 513 of the first cover bottom 510 are connected to an 'L' shape, the fourth area 516 of the second cover bottom 515 A shape in which the fifth region 517 is connected may be a 'b' shape. And, when the shape of the connection between the second region 512 and the third region 513 of the first cover bottom 510 is 'B' shape, the fourth region 516 of the second cover bottom 515 and the second region 516 of the second cover bottom 515 are connected. A shape in which the 5 regions 517 are connected may be an 'L' shape.

The second area 512 and the third area 513 of the first cover bottom 510 are connected and the fourth area 516 and the fifth area 517 of the first cover bottom 515 are connected. As described above, there is an effect of increasing the moment of inertia of the cross section, thereby improving the rigidity of the cover bottom 500 .

Specifically, when the height of the cover bottom is increased in the equation for moment of inertia of area, the rigidity of the cover bottom is proportional to the cube of the height. More specifically, what controls the rigidity of the cover bottom is the section modulus of the cover bottom, and an expression related to the section modulus is the value of the moment of inertia of section. Looking at the relationship between the section modulus and the moment of inertia of section, it is as follows.

The section modulus is the value obtained by dividing the moment of inertia of area by 2 by the height in the direction of the moment. For the same material, the larger the section modulus, the greater the value of the inertia of area and the greater the moment of resistance against the moment acting on the force, so it is not easily broken. I see no That is, the larger the value of moment of inertia of area, the greater the rigidity.

At this time, when there is a rectangle with width b and height h, the cross-sectional area is bh, the height of its centroid (center of gravity) is h/2, and the moment of inertia is bh3/12 (h: height, b: length) , and the section modulus corresponds to bh2/6.

On the other hand, as shown in FIG. 3, the cover bottom 500 according to the present embodiment applies a multi-bending structure in the height direction, thereby giving an effect of increasing the value of h, thereby obtaining the above-mentioned moment of inertia and cross-section. will increase the coefficient. Through this, the rigidity of the cover bottom 500 may be improved.

In this way, by improving the rigidity of the cover bottom 500, it is possible to suppress a phenomenon in which the cover bottom 500 is deformed together due to shrinkage during the cooling process of the guide panel 520 after the guide panel 520 is ejected. That is, since the cover bottom 500 hardly bends even in the process of cooling the guide panel 520, the flatness of the product can be improved, and accordingly, there is an effect of preventing light leakage caused by the bend.

In addition, referring to FIG. 4, the cover bottom and the guide panel according to the present embodiment are reviewed as follows. Referring to FIG. 4 , a separation space and an insertion hole 540 are provided on at least one side of the cover bottom 510 configured in a rectangular shape. Here, the guide panel 520 is provided in the separation space and the insertion hole 540 .

The insertion hole 540 may be provided in a partial area of the first cover bottom 510 of the cover bottom 500 . At this time, the projection 411 of the reflection plate 410 is fastened to the insertion hole 540 . Through this, there is an effect of preventing the flow of the reflector 410.

A detailed examination of the area of the cover bottom 500 provided with the insertion hole 540 according to the present embodiment is as follows. Among the side surfaces surrounding the insertion hole 540 formed in the cover bottom 500, the guide panel 520 may surround the remaining side surfaces except for the side surface in the direction extending from the protrusion 411 to the reflector 410.

Some areas 520a and 520b of the guide panel disposed in a portion of the insertion hole 540 may be configured to have a step difference with the guide panel 520 provided in the spaced space, but the present embodiment is limited to such a structure. It is not. Here, the partial regions 520a and 520b of the guide panel disposed in the partial region of the insertion hole 540 and the guide panel 520 provided in the separation space may be integrally formed.

In addition, the partial regions 520a and 520b of the guide panel provided in the region corresponding to the partial region of the insertion hole 540 may have at least one groove K. Also, the protrusion 411 of the reflector 410 may be seated on the groove K. In addition, each of the partial regions 520a and 520b of the guide panel disposed in the partial region of the insertion hole 540 may have at least one step for fixing the reflector 410 .

Meanwhile, a partial area of the first cover bottom 510 may be disposed on a partial area of the guide panel 520 . Through this, the first cover bottom 510 may be supported by the guide panel 520 . In addition, a partial area of the second cover bottom 515 may be disposed under a partial area of the guide panel 520, and through this, the guide panel 520 may be supported.

This configuration is reviewed in detail with reference to FIG. 5 as follows. 5 is a cross-sectional view taken along line L-M of FIG. 4; Referring to FIG. 5 , the guide panel 520 according to the first embodiment is seated in the separation space 550 provided between the first cover bottom 510 and the second cover bottom 515 .

Here, at least one support part (A) and at least one groove (B) may be provided on one surface of the guide panel 520, and at least one support part (A) and at least one groove (B) are provided. At least one support part (D) and at least one groove (C) may be provided on one side and the opposite side. Each of the support portions A and D of the guide panel 520 may support the cover bottom 500 or the guide panel 520 may be supported by the cover bottom 500 .

Specifically, the third area 513 of the first cover bottom 510 is disposed on the first support portion A of the guide panel 520, so that the guide panel 520 supports the first cover bottom 510. can support In addition, since the guide panel 520 is disposed on the second cover bottom 515 , the second cover bottom 515 can stably support the guide panel 520 . Here, the fourth area 516 of the second cover bottom 515 is seated on the second support part D of the guide panel 520, and the fifth area 517 of the second cover bottom 515 is the guide panel. (520) supports one side.

At this time, the height h4 of the second support part D of the guide panel 520 on which the second cover bottom 515 is seated is equal to the height T of the fourth region 516 of the second cover bottom 515. done in the same way as Therefore, when the fourth area 516 of the second cover bottom 515 is seated on the second support part D of the guide panel 520, the fourth area 516 of the second cover bottom 515 and the guide A step does not occur at the boundary between the second support portion D of the panel 520 .

On the other hand, at least one groove (B, C) is provided on the upper and lower surfaces of the guide panel 520 according to the present embodiments. Since the guide panel 520 is provided with at least one groove (B, C) on the upper and lower surfaces, there is an effect of suppressing shrinkage of the injection-molded guide panel 520.

A detailed description will be made with reference to FIG. 6 . 6 is a cross-sectional view of the guide panel according to the first embodiment.

Referring to Figure 6, the guide panel 520 according to the first embodiment is provided with a first support portion (A) and a first groove (B) on one surface, the first support portion (A) and the first groove (B) ) is provided with a second groove (C) and a second support (D) on the opposite side provided. Here, the first groove B and the second groove C may be grooves surrounded by first surfaces 523 and 526 , second surfaces 524 and 527 , and third surfaces 525 and 528 , respectively.

Here, the first surfaces 523 and 526 of the first groove B and the second groove C may extend in a horizontal direction. And, the second surface 524 and the third surface 525 of the first groove (B) are connected to the end of the first surface 523 of the first groove (B), respectively, and of the second groove (C). The second surface 527 and the third surface 528 may be connected to the end of the first surface 526 of the second groove C. Here, the second surfaces 524 and 527 and the third surfaces 525 and 528 of at least one of the first groove B and the second groove C are arranged to have a predetermined inclination with respect to the horizontal direction. It can be.

The second surfaces 524 and 527 and the third surfaces 525 and 528 of at least one of the first groove B and the second groove C are arranged to have a predetermined inclination with respect to the horizontal direction, There is an effect that it is easy to form the first groove (B) and the second groove (C) through injection molding.

On the other hand, the guide panel 520 formed through the injection process has been pointed out as a problem that deformation occurs due to shrinkage, which is related to the cross-sectional area of the guide panel 520, and by reducing the cross-sectional area of the guide panel 520 , It is possible to suppress the occurrence of warping due to contraction of the guide panel 520.

The guide panel 520 according to the first embodiment can reduce the cross-sectional area of the guide panel 520 by providing at least one of the aforementioned grooves on at least two surfaces of the guide panel 520, through which the guide Shrinkage of the panel 520 may be prevented. In addition, by providing at least one groove on at least two surfaces of the guide panel 520, the amount of resin used to form the guide panel 520 can be reduced. Therefore, there is an effect of lowering the manufacturing cost of the guide panel 520.

In addition, the second surfaces 524 and 527 and the third surfaces 525 and 528 of at least one of the first groove B and the second groove C of the guide panel 520 are aligned in the horizontal direction. By being arranged to have a predetermined slope, the cross-sectional area of one side of each groove can be formed to be wider than the cross-sectional area of the opposite side.

Through this, compared to the case where the second surfaces 524 and 527 and the third surfaces 525 and 528 of the first groove B and the second groove C are arranged vertically relative to the horizontal direction, the guide panel The amount of resin used to form 520 is reduced. Therefore, there is an effect of further reducing the cross-sectional area of the guide panel 520 and further reducing the amount of resin used to form the guide panel 520 .

On the other hand, the first support portion (A) provided on the same surface as the first groove (B) of the guide panel 520 is connected to the first surface 522 extending in the horizontal direction and the first surface 522, It is composed of a second surface 521 disposed vertically with respect to the direction. Although not shown in the drawing, a cover bottom, a reflector, a light guide plate, a plurality of optical sheets, and a display panel may be disposed on the first support part A.

Here, the height h1 of the first support portion A is equal to the height of the second surface 521 of the first support portion A. At this time, the height h2 of the first groove B provided on the same surface as the first support portion A may be higher than the height h1 of the first support portion A. That is, since the height h2 of the first groove B is formed high, the amount of resin used to form the guide panel 520 can be reduced.

In addition, the second support part (D) provided on the same surface as the second groove (C) of the guide panel 520 is connected to the first surface 530 and the first surface 530 extending in the horizontal direction, It is composed of a second surface 529 disposed perpendicular to the direction. Although not shown in the drawings, a second cover bottom may be disposed on the second support part D.

Here, the height h4 of the second support part D is equal to the height of the second surface 529 of the second support part D. At this time, the height h3 of the second groove C provided on the same surface as the second support portion D may be higher than the height h4 of the second support portion D. That is, since the height h3 of the second groove C is formed high, the amount of resin used to form the guide panel 520 can be reduced.

In other words, by providing at least one groove (B, C) on the upper and lower surfaces of the guide panel 520, the amount of resin used in manufacturing the guide panel 520 is reduced, thereby reducing the guide panel 520 It is possible to suppress the occurrence of shrinkage deformation during the injection process and after injection. In addition, by reducing the amount of resin used, there is an effect of reducing manufacturing costs.

Meanwhile, the cross-sectional shape of the guide panel 520 is not limited to that of FIG. 6 and may also have a structure as shown in FIGS. 7 and 8 . 7 is a cross-sectional view of a guide panel according to a second embodiment. 8 is a cross-sectional view of a guide panel according to a third embodiment. Guide panels according to the second and third embodiments may include the same components as those of the previous embodiment. A description overlapping with the above-described embodiment may be omitted. Also, the same components have the same reference numerals.

Referring first to FIG. 7 , in the guide panel 720 according to the second embodiment, the first surface 623 of the first groove E provided on the same surface as the first support part A extends in the horizontal direction. can And, the second surface 624 and the third surface 625 of the first groove E are connected to the end of the first surface 623, respectively, and may be disposed vertically with respect to the horizontal direction.

In addition, the second surface 527 and the third surface 528 of the second groove C provided on the same surface as the second support part D may be disposed with a predetermined inclination relative to the horizontal direction. .

8, in the guide panel 820 according to the third embodiment, the first surface 626 of the second groove F provided on the same surface as the second support part D extends in the horizontal direction. It can be. In addition, the second surface 627 and the third surface 628 of the second groove F are connected to the ends of the first several 626, respectively, and may be arranged vertically with respect to the horizontal direction.

In addition, the second surface 524 and the third couple 525 of the first groove B provided on the same surface as the first support part A may be disposed with a predetermined inclination relative to the horizontal direction. .

That is, in the guide panel according to the present embodiments, it is sufficient if the second surface of at least one of the grooves provided in the guide panel and the third surface facing the second surface are arranged with a predetermined inclination.

Subsequently, the structure of the rear surface of the cover bottom to which the guide panel according to the present embodiment is fastened is reviewed as follows. 9 is a plan view showing the rear surface of the cover bottom to which the guide panel according to the present embodiment is fastened. The guide panel and cover bottom according to FIG. 9 may include the same components as in the above-described embodiment. A description overlapping with the above-described embodiment may be omitted. Also, the same components have the same reference numerals.

Referring to FIG. 9 , a guide panel 520 having a plurality of grooves is disposed in a separation space 550 provided between the first cover bottom 510 and the second cover bottom 515 . The plurality of grooves shown in FIG. 9 may have the same configuration as the second groove C of FIG. 6 . In addition, a guide panel 520 may be provided in the insertion hole 540 provided in the first cover bottom 510 .

Meanwhile, although FIG. 9 discloses a configuration in which a plurality of grooves are provided in the guide panel 520, a configuration in which at least one groove is provided on the rear surface of the guide panel 520 is sufficient. Since the rear surface of the guide panel 520 is also provided with at least one groove, there is an effect of suppressing deformation during injection molding of the guide panel 520 .

Next, a comparison of the structures of the guide panel and the cover bottom according to the comparative example and the embodiment is as follows. 10 is a view comparing cross-sectional structures of a guide panel and a cover bottom according to a comparative example and an embodiment.

Referring to FIG. 10 , the cover bottom 900 according to the comparative example has a shape bent from the side. On the other hand, the cover bottom 500 according to the present embodiment is composed of first and second cover bottoms 510 and 515, and at least one side of the cover bottom 500 includes the first cover bottom 510 and the second cover. A separation space between the bottoms 515 is provided.

Therefore, the cover bottom 900 according to the comparative example has a smaller moment of inertia and section modulus than the cover bottom 500 according to the present embodiment (the cover bottom according to the present embodiment has a higher h value due to the bending area) greater), the stiffness of the cover bottom 900 according to the comparative example is lower than that of the cover bottom 500 according to the present embodiment.

In addition, the guide panel 920 according to the comparative example has a structure having fewer grooves and support parts than the guide panel 520 according to the present embodiment. Specifically, the guide panel 920 according to the comparative example is provided with a groove (H) on the same surface on which the support portion (G) is disposed, but the opposite surface provided with the support portion (G) and the groove (H) has a flat structure. do.

On the other hand, the guide panel 520 according to this embodiment is provided with a first groove (B) on the same surface on which the first support portion (A) is disposed, the first support portion (A) and the first groove (B) A second groove (C) and a second support portion (D) are further provided on the opposite surface provided. Therefore, since the guide panel 920 according to the comparative example has a larger amount of resin used to manufacture the guide panel 920 than the guide panel 520 according to the present embodiment, the guide panel according to the present embodiment ( 520), the shrinkage rate during injection molding is higher.

These effects are reviewed with reference to FIG. 11 as follows. 11 is a table comparing the effects of guide panels and cover bottoms according to comparative examples and examples.

Referring to Figure 11, the cross-sectional area of the guide panel according to the comparative example is 4.275mm2, the cross-sectional area of the guide panel according to the embodiment is 2.489mm2, the cross-sectional area of the guide panel according to the embodiment is greater than the cross-sectional area of the guide panel according to the comparative example small can be seen. Therefore, when manufacturing the guide panel according to the embodiment, it can be seen that the amount of resin used is less than when manufacturing the guide panel according to the comparative example. Accordingly, less shrinkage occurs during injection of the guide panel, and manufacturing costs can be saved.

In addition, the value of the moment of inertia of area of the cover bottom according to the comparative example is 0.3255mm4, and the value of the moment of inertia of area of the cover bottom according to the embodiment is 0.5743mm4. It can be seen that it is greater than the value of moment of inertia according to the example. Therefore, it can be seen that the stiffness of the cover bottom according to the embodiment is greater than that of the cover bottom according to the comparative example. Accordingly, it is possible to suppress a phenomenon in which the cover bottom is bent along the shrinkage direction of the guide panel due to contraction of the guide panel during injection of the guide panel or during cooling after injection of the guide panel.

Therefore, as shown in FIG. 11 , the deformation amount (-0.28 mm) of the cover bottom to which the guide panel according to the embodiment is fastened may be smaller than the deformation amount (-0.45 mm) of the cover bottom to which the guide panel is fastened according to the comparative example. .

That is, the occurrence of warpage can be suppressed through the structure in which the guide panel is fastened to the cover bottom according to the present embodiment, and the light leakage phenomenon caused by the warpage can be improved.

The features, structures, effects, etc. described in the foregoing embodiments are included in at least one embodiment of the present invention, and are not necessarily limited to only one embodiment. Furthermore, the features, structures, effects, etc. illustrated in each embodiment can be combined or modified with respect to other embodiments by those skilled in the art in the field to which the embodiments belong. Therefore, contents related to these combinations and variations should be construed as being included in the scope of the present invention.

In addition, although the embodiments have been described above, these are merely examples and do not limit the present invention, and those of ordinary skill in the field to which the present invention belongs can exemplify the above to the extent that does not deviate from the essential characteristics of the present embodiment. It will be seen that various variations and applications that have not been made are possible. For example, each component specifically shown in the embodiments can be modified and implemented. And differences related to these variations and applications should be construed as being included in the scope of the present invention as defined in the appended claims.

500: cover bottom
510: first cover bottom
515: second cover bottom
520: guide panel
540: insertion hole
550: separation space

Claims (17)

In the guide panel for fixing the display panel,
a first support portion supporting a portion of the display panel;
at least one first groove provided on the same surface as the first support;
at least one second groove provided on a surface opposite to the first support portion; and
A second support provided on the same surface as the second groove; includes,
The first groove and the second groove are grooves surrounded by a first surface, a second surface, and a third surface, respectively, the first surfaces of the first groove and the second groove extend in a horizontal direction, and the first surface of the at least one groove The second surface and the third surface have a predetermined inclination relative to the horizontal direction,
The first support has a first surface extending in a horizontal direction,
The first surface of the first support portion and the first surface of the first groove are located at different heights in the vertical direction.
According to claim 1,
The first support part further includes a second surface connected to one end of the first surface of the first support part and extending in a direction perpendicular to the horizontal direction, and the height of the first support part is equal to the second surface of the first support part. A guide panel equal to the length of the face.
According to claim 2,
A height of the first support portion is lower than a height of the first groove guide panel.
According to claim 1,
The second support part is composed of a first surface extending in a horizontal direction and a second surface connected to one end of the first surface and extending in a direction perpendicular to the horizontal direction, and the height of the second support part is equal to the second surface. A guide panel equal to the length of the second side of the support.
According to claim 4,
A height of the second support portion is lower than a height of the second groove guide panel.
As a square cover bottom,
a first cover bottom including a first area and a second area extending in a horizontal direction, and a third area connected to one end of each of the first area and the second area and extending in a vertical direction; and
A second cover bottom composed of a fourth region extending in a horizontal direction and a fifth region connected to one end of the fourth region and extending in a vertical direction;
On at least one side of the cover bottom, a second cover bottom is disposed outside the first cover bottom so that a space is formed between the first cover bottom and the second cover bottom in the longitudinal direction, and the cover bottoms are spaced apart from each other. .
According to claim 6,
The first cover bottom includes an extension area extending from the first area in a vertical direction, and the extension area is connected to the second cover bottom.
According to claim 6,
A shape in which the second and third regions of the first cover bottom are connected and a shape in which the fourth and fifth regions of the second cover bottom are connected are 'a' or 'b' shapes.
display panel;
an optical sheet, a light guide plate, and a reflector disposed on a rear surface of the display panel;
a light source assembly disposed on at least one side of the light guide plate;
a guide panel supporting the display panel; and
A cover bottom fastened to the guide panel and composed of first and second cover bottoms;
The guide panel includes a first support part supporting a portion of the display panel, at least one first groove provided on the same surface as the first support part, a second support part provided on the opposite surface of the first support part, and at least one first support part. Including a second groove of the dog,
The first groove and the second groove are grooves surrounded by a first surface, a second surface, and a third surface, respectively, and the first surface of at least one of the first groove and the second groove extends in a horizontal direction, and the second groove extends in a horizontal direction. The surface and the third surface have a predetermined inclination relative to the horizontal direction,
A separation space is provided between the first cover bottom and the second cover bottom on at least one side of the cover bottom;
A display device in which the guide panel is fastened to the separation space.
delete According to claim 9,
The cover bottom does not have a separation space between first and second cover bottoms in an area corresponding to an area where the light source assembly is disposed.
delete According to claim 9,
A partial area of the first cover bottom is disposed on the first support part of the guide panel, and a partial area of the second cover bottom is disposed below the second support part of the guide panel.
According to claim 9,
At least one insertion hole is further provided in a partial region of at least one side of the first cover bottom.
15. The method of claim 14,
A display device comprising a guide panel having at least one groove in a region corresponding to the insertion hole in a partial region of the insertion hole.
According to claim 15,
A display device wherein a protrusion extending from at least one side of the reflector is seated in the groove.
According to claim 9,
The light source assembly is attached to at least one side of the cover bottom by a thermal conductive tape.

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