KR20030088577A - Liquid crystal display apparatus - Google Patents

Abstract

Disclosed is a liquid crystal display device capable of realizing thinness while improving assembling. The liquid crystal display includes a liquid crystal display module displaying an image and a case covering the liquid crystal display module. A plurality of fastening grooves are formed on the back of the liquid crystal display module, and a plurality of fastening holes corresponding to the plurality of fastening grooves are formed in the case. Thereafter, the liquid crystal display module and the case are firmly coupled by a screw that penetrates through a plurality of fastening holes and fastened to a plurality of fastening grooves. In this case, the plurality of fastening grooves are formed at four corners of the liquid crystal display module so as to face the front surface from the rear surface thereof without increasing the width of the liquid crystal display module. Therefore, assemblability is improved and a thin liquid crystal display device can be provided.

Description

Liquid crystal display device {LIQUID CRYSTAL DISPLAY APPARATUS}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of improving assembly performance and realizing thickness reduction.

Recently, information processing devices have been rapidly developed to have various forms, various functions, and faster information processing speeds. Such an information processing apparatus requires a liquid crystal display, which is one of display apparatuses for displaying processed information so that a user can check it.

A liquid crystal display device applies voltage to a specific molecular array of a liquid crystal and converts it into another molecular array, and visually changes the optical properties such as birefringence, photoreactivity, dichroism, and light scattering characteristics of the liquid crystal cell that emit light by the molecular arrangement. To display the image.

The size of the liquid crystal display device is gradually increased according to a user's request, and correspondingly, the case for mounting the liquid crystal display module and the liquid crystal display module is also gradually increased. In order to satisfy the increase in size of the liquid crystal display module while satisfying the light and small size reduction of the liquid crystal display device, studies on the coupling structure between the liquid crystal display module and the case and the layout of the members constituting the liquid crystal display module should be continued.

In particular, in the mounting structure for coupling the liquid crystal display module and the case, the coupling space generated by the coupling structure of the liquid crystal display module and the case serves as an important factor in determining the size of the liquid crystal display device.

1 is a cross-sectional view illustrating a coupling structure of a conventional liquid crystal display. However, the direct type liquid crystal display device in which a plurality of lamps are disposed below the liquid crystal display panel will be described as an example.

Referring to FIG. 1, the direct type liquid crystal display device 100 includes a liquid crystal display module and cases 60 and 70 for covering the liquid crystal display module.

The liquid crystal display module includes a liquid crystal display panel 10 for displaying an image and a direct type backlight assembly 20 for providing light to the liquid crystal display panel 10.

The direct backlight assembly 20 includes one or more lamps 21 for generating a first light, a reflector 23 for reflecting the first light, and a material having a uniform luminance distribution by diffusing the first light. 2 includes a diffuser plate 22 for emitting light and a mold frame 25 for receiving the one or more lamps 21, the reflector plate 23 and the diffuser plate 22. The diffusion sheet 24 is further provided on the diffusion plate 22 to diffuse the second light.

The mold frame 25 is formed in a box shape of a rectangular parallelepiped with an upper surface opened. A storage space having a predetermined depth is formed in the mold frame 25, and a first stepped portion 25a is formed at an upper end of the side wall constituting the storage space. The reflecting plate 23 is disposed along the inner surface of the storage space, and the one or more lamps 21 are installed side by side on the reflecting plate 23. The diffusion plate 22 and the diffusion sheet 24 are seated on the first step 25a.

The direct backlight assembly 20 coupled as described above is accommodated in the bottom chassis 30 provided on the rear surface of the mold frame 25. In addition, a middle chassis 40 is disposed on the diffusion sheet 24, and the liquid crystal display panel 10 is seated on the second step 41 of the middle chassis 40. Thereafter, a top chassis 50 is provided on the liquid crystal display panel 10 to be coupled to the bottom chassis 30. Thus, the liquid crystal display module is completed.

On the other hand, the case (60, 70) is a rear case coupled to the front case 60 and the bottom chassis (50) coupled to the front of the top chassis 50 and the bottom of the bottom chassis (30) 70). When the liquid crystal display module and the rear case 70 are coupled, the front case 60 is coupled with the rear case 70 to complete the liquid crystal display 100.

In this case, the liquid crystal display module and the cases 60 and 70 form fastening holes in sidewalls of the liquid crystal display module and sidewalls of the case 60 and 70, and first and second screws passing through the fastening holes. (91, 92) are bound. Specifically, the sidewall of the mold frame 25, the sidewall of the bottom chassis 30, the sidewall of the top chassis 50, the sidewall of the rear case 70 and the sidewall of the front case 60 are fastened to correspond to each other. Balls are formed and they are joined at once by the first and second screws 91 and 92.

However, this structure forms the flesh thickness d1 of the mold frame 25 sufficiently wide in order to secure sufficient space required for the first and second screws 91 and 92 to be fastened. Furthermore, since the coupling between the liquid crystal display module and the cases 60 and 70 depends on the first and second screws 91 and 92, the first and second screws 91, 92) is fastened to four sides.

Therefore, the flesh thickness of the mold frame 25 is increased as a whole to increase the size of the liquid crystal display 100.

SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid crystal display device capable of improving thinness and realizing thinness.

1 is a cross-sectional view illustrating a coupling structure of a conventional liquid crystal display.

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

FIG. 3 is an exploded perspective view illustrating the liquid crystal display of FIG. 2 in detail.

FIG. 4 is a cross-sectional view of the liquid crystal display illustrated in FIG. 2 taken along a cutting line A-A '.

FIG. 5 is a partially cut perspective view illustrating a coupling structure of the liquid crystal display illustrated in FIG. 3.

<Description of the symbols for the main parts of the drawings>

200: liquid crystal display module 210: liquid crystal display panel assembly

220: direct type backlight assembly 230: mold frame

240: bottom chassis 250: middle chassis

260: top chassis 300: front case

400: rear case 500: liquid crystal display

The liquid crystal display device according to the present invention for achieving the above object is a liquid crystal display module having a plurality of fastening grooves recessed in a predetermined depth toward the front surface on the back, a screen for displaying an image on the front surface; A plurality of fastening holes are formed to correspond to the plurality of fastening grooves, and include a case covering the liquid crystal display module.

Here, the liquid crystal display module includes a backlight assembly for generating light, a liquid crystal display panel assembly for displaying an image in response to the light, and a storage container for accommodating the backlight assembly and the liquid crystal display panel assembly.

The plurality of fastening grooves are formed to extend to the side wall after passing through the rear surface of the storage container, and preferably formed at four corner portions of the storage container, respectively.

The case may include a front case coupled to the front surface of the liquid crystal display module and a rear case provided to face the front case and coupled to the rear surface of the liquid crystal display module. Here, a plurality of fastening holes are formed in the rear case.

According to the liquid crystal display device described above, a plurality of fastening grooves are formed on the rear surface of the liquid crystal display module, and a plurality of fastening holes corresponding to the plurality of fastening grooves are formed in the case covering the liquid crystal display module. Thereafter, the liquid crystal display module and the case are firmly fixed by a screw that is penetrated through the plurality of fastening holes and fastened to the plurality of fastening grooves. Therefore, the assembly performance of the liquid crystal display device can be improved while the thickness can be realized.

Hereinafter, a liquid crystal display according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.

2 is a perspective view specifically showing a liquid crystal display according to an exemplary embodiment of the present invention.

Referring to FIG. 2, the liquid crystal display device 500 includes a liquid crystal display module 200 for displaying an image and cases 300 and 400 for covering the liquid crystal display module 200. The cases 300 and 400 are provided to face the rear case 400 coupled to the rear surface 270 of the liquid crystal display module 200 and the rear case 400. It includes a front case 300 coupled from the front.

A plurality of fastening grooves 201, 202, 203, and 204 are formed in the rear surface 270 of the liquid crystal display module 200 toward the front surface of the liquid crystal display module 200 and recessed to a predetermined depth. In detail, first to fourth fastening grooves 201, 202, 203, and 204 are formed at four corners of the rear surface 270 of the liquid crystal display module 200.

Meanwhile, first to fourth fastening holes 401, 402, 403, and 404 corresponding to the first to fourth fastening grooves 201, 202, 203, and 204 are formed on the rear surface 410 of the rear case 400. Is formed.

Thereafter, when the liquid crystal display module 200 is coupled to the cases 300 and 400, the first to fourth fastening grooves 201, 202, 203, and 204 are connected to the first to fourth fastening holes 401. 402, 403, 404. At this time, the first screw 411 is sequentially fastened to the first fastening hole 401 and the first fastening groove 201, the remaining second to fourth screws 412, 413, 414 is also the first screw 411 is fastened to the same structure.

Thereafter, when the front case 300 is coupled to face the rear case 400, the liquid crystal display module 500 is completed by completely coupling the liquid crystal display module 200 and the cases 300 and 400. do.

3 is an exploded perspective view illustrating the internal structure in detail by disassembling the liquid crystal display of FIG. 2, and FIG. 4 is a cross-sectional view of the liquid crystal display of FIG. 2 taken along a cutting line A-A '. 3 and 4, a direct type liquid crystal display device including a plurality of lamps disposed under the liquid crystal display panel and providing light toward the liquid crystal display panel will be described as an example.

Referring to FIGS. 3 and 4, the direct type liquid crystal display device 500 includes a liquid crystal display module 200 and cases 300 and 400 for covering the liquid crystal display module 200. The liquid crystal display module 200 includes a liquid crystal display panel assembly 210 for displaying an image and a direct type backlight assembly 220 for providing light to the liquid crystal display panel assembly 210.

The liquid crystal display panel assembly 210 includes a liquid crystal display panel 211, a data printed circuit board 213, a gate printed circuit board 215, a data side tape carrier package (hereinafter referred to as TCP) 217, and A gate side TCP 219.

The liquid crystal display panel 211 implements a screen and includes a thin film transistor (TFT) substrate 211a, a color filter substrate 211b facing the TFT substrate 211a, and the TFT substrate 211a. ) And a liquid crystal (not shown) injected between the color filter substrate 211b.

Meanwhile, the direct backlight assembly 220 diffuses the first light by at least one lamp 221 for generating a first light, a reflector 223 for reflecting the first light, and a uniform luminance distribution. And a diffuser plate 222 for emitting the second light having the light, and a mold frame 230 for receiving the one or more lamps 221, the reflector plate 223, and the diffuser plate 222. The diffusion sheet 224 is further provided on the diffusion plate 222 to diffuse the second light.

The mold frame 230 is formed in a box shape of a rectangular parallelepiped with an upper surface opened. In detail, the mold frame 230 includes four sidewalls and a bottom surface surrounded by the sidewalls, and the sidewalls and the bottom surface form a storage space having a predetermined depth inside the mold frame 230. . The first stepped portion 230a is formed at the upper end of the sidewalls forming the storage space. The first and second fastening grooves recessed in the first and second sidewalls 231 and 232 of the mold frame 230 to a predetermined depth from the rear surface 235 toward the first stepped portion 230a ( 231a and 232a are formed, respectively.

The reflective plate 223 is disposed along the inner surface of the storage space, and the one or more lamps 221 are installed side by side on the reflective plate 223. The diffusion plate 222 and the diffusion sheet 224 are mounted on the first step 230a.

The direct type backlight assembly 220 assembled as described above is provided on the rear surface 235 of the mold frame 230 and is accommodated in the storage space of the bottom chassis 240 formed in a box shape of a rectangular parallelepiped. Fifth and sixth fastening holes 241 and 242 are formed in the bottom 245 of the bottom chassis 240 to correspond to the first and second fastening grooves 231a and 232a of the mold frame 230. .

Thereafter, a middle chassis 250 is disposed on the diffusion sheet 224. The middle chassis 250 fixes the diffusion plate 222 and the diffusion sheet 224 to the mold frame 230. That is, the middle chassis 250 is formed to have a rectangular band shape in which the second step 251 protruding from the inner wall is formed. Accordingly, the bottom surface of the second step 251 is in contact with the diffusion sheet 224 to press the diffusion plate 222 and the diffusion sheet 224 toward the mold frame 230.

Meanwhile, the liquid crystal display panel 211 is seated on an upper surface of the second step 251 of the middle chassis 250, and the data and gate printed circuit boards for controlling the driving of the liquid crystal display panel 211 ( 213 and 215 are bent to the outer surface of the bottom chassis 240 and fixed to the rear surface 245.

A top chassis having a cramped shape in which an upper and a lower surface of the liquid crystal display panel 211 is coupled to the bottom chassis 240 to fix the liquid crystal display panel 211 to the bottom chassis 240. 260 is provided. Thus, the liquid crystal display module 200 is completed.

Meanwhile, the cases 300 and 400 are coupled to face the top chassis 260 at the front case 300 coupled to the front surface of the top chassis 260 and the rear surface 245 of the bottom chassis 240. It consists of a rear case 400.

The front case 300 is formed of a front surface corresponding to an effective display area of the liquid crystal display module 200 and sidewalls surrounding the front surface. The rear case 400 includes four sidewalls and a bottom surface surrounded by the sidewalls, and a rear surface 410 is formed at a position where fifth and sixth fastening holes 241 and 242 of the bottom chassis 240 are formed. Correspondingly, first and second fastening holes 401 and 402 are formed.

As shown in FIG. 4, when the mold frame 230, the bottom chassis 240, and the rear case 400 are coupled, the first fastening hole 401, the fifth fastening hole 241, and the first fastening are coupled. The first screw 411 sequentially penetrating the groove 231a and the second screw 412 sequentially penetrating the second fastening hole 402, the sixth fastening hole 242, and the second fastening groove 232a. ) Is completely coupled to the mold frame 230, the bottom chassis 240 and the rear case 400. Thereafter, the front case 300 is coupled to face the rear case 400, thereby completing the direct type liquid crystal display 500.

Here, a predetermined separation space is formed between the one or more lamps 221 and the diffusion plate 222, and the separation space includes the first light generated from the one or more lamps 221 in the diffusion plate. It is a light guide area for guiding to 222. In order to sufficiently secure the light guide region, the first and second sidewalls 231 and 232 of the mold frame 230 are formed to have a predetermined height. In this case, the first and second fastening grooves 231a and 232a are formed toward the upper ends of the first and second sidewalls 231 and 232 from the rear surface 235 of the mold frame 230. A space in which the second screws 411 and 412 may be fastened may be sufficiently secured.

As a result, the thickness d2 of the first and second sidewalls 231 and 232 may be smaller than the thickness d1 of the sidewall of the conventional mold frame 25 illustrated in FIG. The overall size of the liquid crystal display 500 may be reduced.

FIG. 5 is a partial cutaway perspective view illustrating the coupling structure of the liquid crystal display module and the rear case of FIG. 3 in more detail. However, in FIG. 5, by explaining the coupling structure of the first sidewall 231 of the mold frame 230, the description of the remaining sidewalls having the same structure and coupling is omitted.

Referring to FIG. 5, a first fastening groove 231a is formed in the rear surface 235 of the mold frame 230, and a back fastening groove 231a of the bottom chassis 240 corresponds to the first fastening groove 231a. The fifth fastening hole 241 is formed, and the first fastening hole 401 is formed on the rear surface 410 of the rear case 400 to correspond to the fifth fastening hole 241. Here, the first screw 411 sequentially passes through the first fastening hole 401, the fifth fastening hole 241, and the first fastening groove 231a to form the mold frame 230 and the bottom chassis 240. And it is fastened to the rear case 400 to couple them.

In this case, an insert 236 having a cylindrical shape is formed in the first fastening groove 231a, the bottom surface of which is blocked and the upper surface facing the bottom surface is opened. The insert 236 is processed into a predetermined shape so that the first screw 401 can be fastened. The insert 236 serves to prevent the mold frame 230 from being damaged by the first screw 401 in the assembly process. Therefore, the insert 236 is preferably made of a material having a stronger strength than the mold frame 230.

As shown in FIG. 5, the insert 236 is fitted into the first fastening groove 231a before the mold frame 230 is received in the bottom chassis 240.

On the other hand, the rear surface 410 of the rear case 400 has a region (B) formed relatively thin flesh. The area B is a peripheral area in which the first fastening hole 401 is formed, and is also an area in which an interview is performed with the head of the first screw 411. The area B may have a thinner thickness than other areas, thereby preventing the size of the direct type liquid crystal display 500 from increasing after the first screw 411 is fastened.

3 to 5, the coupling structure of the liquid crystal display module and the case in the direct type liquid crystal display device is described as an embodiment of the present invention, but the present invention is not limited thereto. That is, the present invention can be sufficiently applied to an edge type liquid crystal display device that displays an image by providing light to a liquid crystal display panel by providing a lamp on the side of the light guide plate.

According to the present invention, a plurality of fastening grooves are formed on the rear surface of the liquid crystal display module, and a plurality of fastening holes corresponding to the plurality of fastening grooves are formed in the case covering the liquid crystal display module. Thereafter, the liquid crystal display module and the case are firmly coupled by a screw that penetrates the plurality of fastening holes and fastens to the plurality of fastening grooves.

In this case, the plurality of fastening grooves may be formed without increasing the width of the liquid crystal display module because the plurality of fastening grooves are formed to face the front surface from the rear surface at the four corner portions of the liquid crystal display module. Accordingly, the liquid crystal display device can be thinned.

In addition, after the rear surface of the liquid crystal display module and the rear case are firmly bonded by the screw, the assembly of the liquid crystal display device can be further improved by having a double bond structure that couples the rear case and the front case. .

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

Claims (6)

A liquid crystal display module having a plurality of fastening grooves recessed to a predetermined depth toward a front surface thereof and having a screen for displaying an image on the front surface thereof; And And a plurality of fastening holes formed corresponding to the plurality of fastening grooves and covering the liquid crystal display module. The liquid crystal display module of claim 1, wherein A backlight assembly for generating light; A liquid crystal display panel assembly for displaying an image in response to the light; And And a housing container for accommodating the backlight assembly and the liquid crystal display panel assembly. The liquid crystal display device of claim 2, wherein the plurality of fastening grooves extend through the rear surface of the storage container and extend to sidewalls. The liquid crystal display of claim 3, wherein the plurality of fastening grooves are formed at four corners of the storage container, respectively. The method of claim 1, wherein the case, A front case coupled from the front side; And And a rear case provided to face the front case and coupled to a rear surface of the liquid crystal display module. The liquid crystal display of claim 5, wherein the plurality of fastening holes are formed in the rear case.