KR20050104788A - Combination structure of main support and bottom cover of liquid crystal display device - Google Patents

Abstract

The present invention relates to a structure of a liquid crystal display device, and more particularly, to a coupling structure of a main support and a lower cover for fixing a backlight assembly of a liquid crystal display device. In the coupling method, the main support is provided with an embossed coupling part, and the lower cover is provided with an intaglio coupling part, respectively, and the backlight assembly forming space is increased to improve the wide viewing angle.

Description

Combination structure of main support and lower cover of liquid crystal display device {COMBINATION STRUCTURE OF MAIN SUPPORT AND BOTTOM COVER OF LIQUID CRYSTAL DISPLAY DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a module structure of a liquid crystal display device, and more particularly, to a structure of connecting a main support and a bottom cover of a module of a liquid crystal display device.

In general, a liquid crystal display device is a display device in which data signals according to image information are individually supplied to pixels arranged in a matrix form, and thus a desired image is displayed by adjusting light transmittance of the pixels. .

Accordingly, the liquid crystal display includes a display panel in which pixels are arranged in a matrix, and a driving unit for driving the pixels.

The display panel is spaced apart from a thin film transistor array (TFT array) substrate and a color filter substrate bonded to each other while maintaining a constant cell gap. The display panel is spaced apart from the color filter substrate and the TFT array substrate. It has a structure in which a liquid crystal layer is filled in the space.

A common electrode and a pixel electrode are formed on the liquid crystal display panel where the TFT array substrate and the color filter substrate are bonded to apply an electric field to the liquid crystal layer.

Therefore, when the voltage of the data signal applied to the pixel electrode is controlled while the voltage is applied to the common electrode, the liquid crystal of the liquid crystal layer rotates by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode. Characters or images are displayed by transmitting or blocking light for each pixel.

Since the liquid crystal display does not emit light by itself and has a characteristic of displaying an image by adjusting light transmittance, an additional means for irradiating light to the display panel, that is, a backlight assembly, is required.

The backlight assembly may include a direct light source disposed on a rear surface of the display panel so that light is directly projected onto a front surface of the display panel, and a light source disposed on one side or both sides of the display panel so that the light is disposed on the light guide plate, the reflector plate, and the sheet ( By reflecting, diffusing and condensing through the sheets, they are divided in an edge manner so as to be transmitted to the entire surface of the display panel.

As described above, the LCD includes a display panel, a driver, and a backlight assembly, and various types of components are used to support and couple the display panel, the driver, and the backlight assembly.

That is, the display panel and the backlight assembly are stacked on a main support, and side surfaces of the stacked display panel and the backlight assembly are supported by the main support. In addition, the top edge of the display panel is pressed into a top case, and the top case and the main support are coupled with screws, and the stacked display panel and the backlight assembly are disposed on the rear surface of the backlight assembly. Supported by a bottom cover, the bottom cover and the top case are screwed together.

Hereinafter, an exploded perspective view of a liquid crystal display will be described with reference to FIG. 1.

The liquid crystal display includes a display panel 10 in which pixels are arranged in a matrix form; A gate driver 20 and a data driver 30 connected to side surfaces of the display panel 10, respectively; It is composed of a backlight assembly 40 disposed on the back of the display panel 10.

The display panel 10 includes a TFT array substrate and a color filter substrate bonded together to maintain a uniform cell-gap facing each other, and a liquid crystal layer formed at a spaced interval between the color filter substrate and the thin film transistor array substrate.

A common electrode and a pixel electrode are formed on the liquid crystal display panel where the TFT array substrate and the color filter substrate are bonded to apply an electric field to the liquid crystal layer.

Therefore, when the voltage of the data signal applied to the pixel electrode is controlled while the voltage is applied to the common electrode, the liquid crystal of the liquid crystal layer rotates by dielectric anisotropy according to the electric field between the common electrode and the pixel electrode. For example, characters or images are displayed by transmitting or blocking light for each pixel.

In addition, in order to control the voltage of the data signal applied to the pixel electrode for each pixel, a switching element such as a thin film transistor is separately provided in the pixels.

The gate driver 20 and the data driver 30 are coupled to the display panel 10 in various forms to supply scan signals and image information to gate lines and data lines formed on the display panel 10. The pixels of the panel 10 are driven.

The backlight assembly 40 may include a light guide plate 41 disposed on a rear surface of the display panel 10; First and second lamp assemblies 42 and 43 disposed on both side surfaces of the light guide plate 41; The reflective sheet 44 is disposed on the rear surface of the light guide plate 41, and an optical sheet 45 is disposed between the display panel 10 and the light guide plate 41.

Light generated by the first and second lamp assemblies 42 and 43 is incident on the side surface of the light guide plate 41 formed of a transparent material.

The reflector plate 44 disposed on the rear surface of the light guide plate 41 reflects the light transmitted to the rear surface of the light guide plate 41 to the upper surface of the light guide plate 41 to reduce the loss of light and is transmitted to the upper surface of the light guide plate 41. Improves light uniformity

Accordingly, the light guide plate 41 transmits the light generated by the first and second lamp assemblies 42 and 43 together with the reflecting plate 44 to the upper surface.

For the optical sheet 45 disposed between the display panel 10 and the light guide plate 41, a diffusion sheet and a prism sheet may be applied, and a protective sheet may be added.

The diffusion sheet disperses the light incident from the light guide plate 41 to prevent the light from being partially concentrated, thereby preventing stains from occurring in the image displayed on the display panel 10, and the angle of the light incident from the light guide plate 41. Refract vertically.

In addition, the prism sheet collects light incident from the diffusion sheet so as to be uniformly distributed on the entire surface of the display panel 10.

The protective sheet protects the optical sheet 45 sensitive to dust and scratches, prevents the optical sheet 45 from flowing when the backlight assembly 40 is transported, and diffuses light incident from the prism sheet. It can have a function to make the light more uniformly distributed.

Meanwhile, the backlight assembly 40 has an edge method in which first and second lamp assemblies 42 and 43 are provided on both side surfaces of the light guide plate 41, but a lamp assembly is provided only at one side of the light guide plate 41. The edge method may be applied, or a direct method may be applied in which the lamp assembly is disposed to correspond to the entire rear surface of the display panel 10.

The display panel 10 and the backlight assembly 40 are stacked on the main support 50, and side surfaces of the stacked display panel 10 and the backlight assembly 40 are supported by the main support 50.

The top edge of the display panel 10 is compressed by the top case 51, and the top case 51 is coupled to the main support 50 by a screw.

Meanwhile, the backlight assembly 40 having the main support 50, the light guide plate 41, the diffusion plate, and the prism sheet is stacked on the lower cover 52 while being supported by the main support 50 and the lower cover. 52 and the main support 50 is coupled to each other by a hook method.

With reference to Figure 2 looks at in more detail how the lower cover 52 and the main support 50 is coupled to each other.

The main support 50 has a plurality of hook pins 60 to the outside, the hook pin 60 is protruded out, the lower cover 52 is the main support to the outside of the lower cover 52 The groove 61 corresponding to the plurality of hook pins 60 formed on the outer side of the 50 is provided. Therefore, the main support 50 and the lower cover 52 are coupled to each other by the coupling of the groove 61 and the hook pin 60.

Meanwhile, a groove may be formed in the main support 50 instead of the hook pin, and a hook pin may be formed in the lower cover 52 instead of the groove to couple the main support and the lower cover to each other.

However, as shown in FIG. 3, since the main support 50 overlaps the inside of the lower cover 52 and is coupled with the lower cover, there is a problem of narrowing a space in which the backlight assembly is formed. Even when the main support 50 is coupled to the outside of the lower cover 52, the formation space of the backlight assembly is the same. In particular, in the small liquid crystal display device in which the lamp assembly is formed on the side of the light guide plate, a minute reduction in the space in which the backlight assembly is formed leads to a reduction in the area of the screen display part and makes it difficult to secure a wide viewing angle.

An object of the present invention is to improve the problem of reducing the formation space of the backlight assembly by the main support and the lower cover of the liquid crystal display device as described above. In addition, the object of the present invention is to secure a wide viewing angle by increasing a space for forming a light guide plate formed in the backlight assembly forming space by securing a backlight assembly forming space.

In order to achieve the above object, the liquid crystal display device of the present invention includes a lower cover having a plurality of intaglio fastening portions, a main support having an inclined fastening portion corresponding to the intaglio fastening portion, and supported by the main support. And a top case configured to compress the top edge of the backlight assembly and the main support and to be coupled to the lower cover.

The liquid crystal display panel includes a TFT array substrate, a color filter substrate, and a liquid crystal filled between the two substrates. The liquid crystal display panel includes a backlight assembly for irradiating light to the liquid crystal display device under the TFT array substrate. The backlight assembly includes a reflector plate, a light guide plate, a diffuser plate, a prism sheet, and the like.

In addition, a lamp assembly is formed as a light source on the side or the back of the backlight assembly to irradiate light to the liquid crystal display. In particular, in a small liquid crystal display device, a lamp assembly is often formed on the side surface.

The backlight assembly is coupled while the side is supported by the main support and the bottom is supported by the lower cover. In addition, the main support and the lower cover are coupled to each other, the present invention improves the coupling structure of the main support and the lower cover to ensure a larger space for the light guide plate is formed.

The backlight assembly is installed in the inner space of the main support while the side is supported by the main support. Therefore, the space for forming the backlight assembly is determined by the main support. In addition, the lamp assembly is formed on the side of the backlight assembly, in particular, the light guide plate is supported by the main support, it is advantageous to secure a wide viewing angle because more light can be entered into the light guide plate to secure more area in which the light guide plate is formed.

Therefore, in order to increase the installation area of the light guide plate formed in the inner space of the main support while being supported by the main support, as shown in FIG. 4, the main support 302 and the lower cover 301 overlap each other up and down. We propose a coupling structure that can be combined.

Hereinafter, the coupling structure of the main support and the lower cover of the liquid crystal display will be described as an embodiment of the present invention with reference to FIG. 4.

The main support 302 supporting the backlight assembly has a rectangular shape and has fastening portions 310 each of which are embossed on four sides. The embossed fastening part 310 may be formed in plural on each side of the main support 302, and the embossed fastening part 310 may be configured in a hook shape to reinforce the joining force after engaging the lower cover. .

In addition, the main support 302 has a first joining surface having a coupling guide groove on the coupling end surface of the main support facing the ground to be vertically coupled to the lower cover.

On the other hand, the lower cover 302 is coupled to the main support 301 is provided with an intaglio fastening portion 320 corresponding to each of the fastening portion 310 of the relief formed on the main support (301). The intaglio fastening part 320 is configured in the same shape as the embossing fastening part 310 and is configured in the intaglio hook type to strengthen the coupling force of the main support 301 and the lower cover 301. In addition, the lower cover 302 may be made of a material having flexibility (flexibility) so that the hook-type embossed fastening part 310 can be easily coupled to the intaglio fastening part 320.

In addition, the lower cover is provided with a second joining surface having a guide protrusion corresponding to the guide groove of the first joining surface of the main support 302 on the surface joining with the main support. 4 shows an enlarged view of the first bonding surface and the second bonding surface.

5 is a view illustrating a structure in which the main support 302 and the lower cover 301 are coupled to each other according to an embodiment of the present invention, wherein the fastening portion 310 of the relief and the fastening portion 320 of the intaglio are coupled to each other. It can be seen that the coupling portion 330 is formed.

The present invention is characterized in that the main support 302 and the lower cover 301 are coupled to each other while stacked up and down. Therefore, as compared with the conventional coupling method in which the main support and the lower cover are coupled to the left and right by the hook pin, the space in which the light guide plate is formed can be more secured.

In the coupling method of the present invention, as the thickness of the main support or the lower cover is thicker, the inner space of the main support may be more effectively formed.

On the other hand, when the compact liquid crystal display device is constructed, the thickness of the main support 302 and the lower cover 301 is thin, so that the main support 302 and the lower cover 301 are stacked on top of each other and difficult to be combined. There may be.

As described above, when the thickness of the main support 302 and the lower cover 301 is thin, the main support 302 and the lower support 302 may be coupled to the main support 302 and the lower cover 301 so as to effectively combine. The cross-sectional shape of the lower cover 301 is modified.

Hereinafter, referring to FIG. 6, when the main support 302 and the lower cover 301 are coupled to each other, the structure in which the main support 302 and the lower cover 301 are coupled to each other in the region other than the coupling portion 330 is examined.

The contact portion of the main support 302 and the lower cover 301 may be divided into a coupling portion 330 and a coupling portion excluding the coupling portion, which are coupled by hooks. In particular, the shape of the bonding portion will be described with reference to FIG. 6.

In the liquid crystal display of the present invention, since the main support 302 and the lower cover 301 are laminated and coupled to each other, when the thickness of the panel constituting the main support and the lower cover is narrow, it is difficult to combine by lamination.

Therefore, in the present embodiment, the main support 302 and the lower cover 301 are laminated to each other to form a bonding surface formed by the groove of the embossed groove and the corresponding intaglio groove to facilitate the stacking.

Referring to FIG. 6, a line-shaped groove 340 is formed along the first bonding surface formed on the bottom surface (surface facing the ground) of the main support 302 that engages with the lower cover 301. The groove 340 may be formed on the entire joint surface except for the fastening part 330 of the main support 302.

Meanwhile, a protrusion 350 corresponding to the groove 340 of the main support 302 is formed on the bonding surface of the lower cover 301, and the protrusion 350 and the groove 340 are coupled to each other to support the main support. Guide the combination of 302 and lower cover 301.

Therefore, the coupling between the main support 302 and the lower cover 301 is guided by the coupling of the groove 340 and the protrusion 350, and the fastening portion 310 of the embossed portion 320 and the fastening portion 320 of the indentation 320. By the main support 302 and the lower cover 301 is coupled to each other.

As described above, since the main support 302 and the lower cover 301 are stacked vertically and coupled to each other, the main support 302 and the lower cover 301 may be secured to have a larger space inside the main support than in the conventional left and right combination.

The backlight assembly including the light guide plate is formed in the inner space of the main support. The structure of the backlight assembly and the liquid crystal panel formed in the main support 302 and the lower cover 301 will be described with reference to FIG. 7.

As shown in FIG. 7, the liquid crystal display includes a backlight assembly on the lower cover 301. The backlight assembly includes a light guide plate 702 for guiding light in a predetermined direction and a diffusion plate 703 for diffusing the light guided by the light guide plate 702 in the liquid crystal panel direction, and a prism on the diffusion plate 703. A sheet (not shown) and a protective sheet (not shown) may be further provided, and a reflecting plate (not shown) may be further provided below the light guide plate 702. In addition, a TFT array substrate 704 and a color filter substrate 705 corresponding to the TFT array substrate 704 are formed on the light guide plate 702 and between the TFT array substrate 704 and the color filter substrate 705. The liquid crystal (not shown) is filled in and polarizing plates 706a and 706b are formed on the outside thereof.

On the other hand, the side of the light guide plate 702 is formed with a lamp 701 for supplying light to the light guide plate 702. According to the present invention, since the main support 302 and the lower cover 301 are stacked by being stacked up and down with each other, the space in which the lamp assembly including the lamp 701 is formed can be increased, so that the lamp 701 can be maximized as the main support ( 302).

As described above, since the lamp 701 is formed in close contact with the main support 302, the light generated by the lamp 701 is increased by increasing the space for forming the light guide plate 703 formed on the side surface of the lamp 701. The light guide plate 702 may supply more to the upper liquid crystal display panel, thereby improving a wide viewing angle problem occurring at the side of the liquid crystal display panel.

As described above, the liquid crystal display device, in particular, in the liquid crystal display device in which the lamp assembly is formed on the side of the backlight assembly, improves the shape of combining the main support and the lower cover with the vertical coupling method, thereby greatly increasing the space where the light guide plate is formed. By securing the wide viewing angle of the liquid crystal display device and simplifying the coupling shape of the main support and the lower cover, it is easy to manufacture the mold of the main support and the lower cover.

1 is a perspective view showing a configuration of a general liquid crystal display device.

Figure 2 is a perspective view showing a coupling structure of the general main support and the lower cover.

Figure 3 is a perspective view showing a coupling portion of the general main support and the lower cover.

Figure 4 is a perspective view showing the structure of the main support and the lower cover of the present invention.

5 is a perspective view showing a coupling portion of the main support and the lower cover of the present invention.

Figure 6 is a cross-sectional view showing the structure of the non-engagement portion of the main support and the lower cover of the present invention.

7 is a cross-sectional structure of the liquid crystal display device of the present invention.

***** Explanation of symbols for main parts of the present invention *****

302: main support 301: lower cover

310: embossed part 320: intaglio part

330: coupling portion 340: guide groove

350: guide protrusion

Claims (10)

A main support having a fastening portion of the relief and supporting the backlight assembly; A lower cover having an intaglio fastening part corresponding to the intaglio fastening part; A first joining surface formed on the main support and having an embossed guide protrusion and joined to the lower cover; A second joining surface formed on the lower cover and having a recessed guide groove and joined to the main support; And a backlight assembly and a lamp assembly formed in an inner space formed by the combination of the main support and the lower cover. The liquid crystal display of claim 1, wherein the main support and the lower cover are joined by the fastening portion of the relief and the fastening portion of the intaglio while being joined by the first bonding surface and the second bonding surface. The method of claim 1, wherein the main support and the lower cover is coupled by the fastening portion and the intaglio engaging portion of the relief while the joint of the main support and the lower guide is guided by the embossed guide protrusion and the indentation guide groove Liquid crystal display device characterized in that. The liquid crystal display of claim 1, wherein the first bonding surface is the entire surface of the surface where the main supporter is in contact with the lower cover, except for the fastening portion of the relief. The liquid crystal display of claim 1, wherein the guide protrusion and the guide groove correspond to each other. The liquid crystal display device according to claim 1, wherein the embossed fastening part is a hook type fastening part. The liquid crystal display of claim 1, wherein the lamp assembly is in close contact with the main support and the light guide plate constituting the backlight assembly is in close contact with the lamp assembly. A main support having a first bonding surface supporting the backlight assembly and bonding to the lower cover; A lower cover having a second joining surface that is perpendicular to the first joining surface of the main support; And a backlight assembly formed in an inner space formed by the combination of the main support and the lower cover. The liquid crystal display device of claim 8, wherein the main support has a hook-shaped embossed fastening portion, and the lower cover includes an engraved fastening portion corresponding to the embossed fastening portion. The method of claim 8, wherein the first joining surface has a guide groove for inducing engagement with the lower cover And the first bonding surface includes a guide protrusion corresponding to the guide groove.