KR20030088576A - Liquid Crystal Display Device - Google Patents

Abstract

PURPOSE: A liquid crystal display is provided to remove processes for coupling screws and prevent defects from abrasion of the screw by not using the screws in combining a PCB cover with a bottom chassis. CONSTITUTION: A top chassis(620) fixes a liquid crystal display panel(630) and has at least one or more first combination windows on one side. A bottom chassis(660) contains a backlight assembly(650) and has one or more hook-shaped combination units on a bottom surface. A bottom mold frame(670) contains the bottom chassis and is combined with the top chassis. A data PCB(Printed Circuit Board) is fixed at a lower part of the bottom mold frame for controlling driving of the liquid crystal panel. A printed circuit substrate cover(680) includes a first side wall extended from a first edge of a cover bottom surface, and a second side wall extended from a second edge opposite to the first edge, and a combination plate extended from an upper part of the second side wall and inserted into the combination units.

Description

Liquid Crystal Display Device

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of improving the assemblability of a PCB cover protecting a PCB.

Recently, with the development of technology, display products have been produced that are more compact and lighter in performance. Until now, CRTs have been widely used in display devices with many advantages in terms of performance and price, but liquid crystal displays having advantages of miniaturization, portability, and the advantages of miniaturization, light weight, and low power consumption have been noted. I am getting it.

In general, a liquid crystal display device converts a molecular array by applying a voltage to a specific molecular array of the liquid crystal, and changes in optical properties such as birefringence, photoreactivity, dichroism, and light scattering characteristics of the liquid crystal cell that emit light by the conversion of the molecular array. The display device converts the image into a visual change to display an image.

1 is an exploded perspective view schematically illustrating a conventional liquid crystal display, and FIG. 2 is a cross-sectional view of a conventional liquid crystal display.

1 and 2, the liquid crystal display 100 may include a front case 110, a top chassis 120, a liquid crystal display panel 130, a middle mold frame 140, a backlight assembly 150, and a bottom chassis. It comprises a 160, a bottom mold frame 170, and a rear case 190.

The top chassis 120 fixes the liquid crystal display panel 130 by combining the middle mold frame 140 and the first screw 125 provided on the bottom mold frame 170 and a plurality of coupling windows on the sidewalls. It has 121a.

The liquid crystal display panel 130 includes a color filter substrate 130a in which a predetermined color is expressed by RGB color pixels as light passes, a thin film transistor substrate 130b which is a transparent glass substrate on which a thin film transistor on a matrix is formed, and a color. And a liquid crystal (not shown) sealed between the filter substrate 130a and the thin film transistor substrate 130b.

The liquid crystal display panel 130 includes data and gate PCBs 130e and 130f in addition to the color filter substrate 130a and the thin film transistor substrate 130b. The data and gate PCBs 130e and 130f are connected to the liquid crystal display panel 130 by data and gate tape carrier packages (hereinafter referred to as 'TCP') 130c and 130d, which are a type of flexible circuit board, and are connected to the data and gate. The PCBs 130e and 130f apply driving signals and timing signals to the gate lines and the data lines of the thin film transistors in order to control the arrangement angles of the liquid crystals and when the liquid crystals are arranged.

The backlight assembly 150 includes an optical sheet 150a, a light guide plate 150b, and lamp units 150c and 150d. The light guide plate 150b changes the path of the light while guiding the light generated by the lamp units 150c and 150d toward the liquid crystal display panel 130. A plurality of optical sheets 150a are provided on the upper side of the light guide plate 150b so as to uniform the luminance of the light emitted from the light guide plate 150b, and the rear surface of the light guide plate 150b is not emitted toward the liquid crystal display panel 130. A reflecting plate 150e is provided to reflect the light emitted from the rear surface of the back surface 150b toward the liquid crystal display panel 130 to increase the light efficiency.

The bottom chassis 160 accommodates the backlight assembly 150, and a screw groove 161a is formed on a rear surface of the bottom chassis 160.

The bottom mold frame 170 accommodates the bottom chassis 160, and a coupling protrusion 171 coupled to the coupling window 121a formed on the top chassis 120 is hooked to a sidewall of the bottom mold frame 170. Many are provided.

The data PCB 130e bends the data TCP 130c 180 degrees toward the bottom of the bottom mold frame 170 and is positioned on the bottom of the bottom mold frame 170 to control the driving of the liquid crystal display panel 130.

The PCB cover 180 is grounded to the bottom chassis 160 by the second screw 182 to block short and EMI generated in the data PCB 130e.

3 is a perspective view illustrating a coupling relationship between a top chassis, a bottom chassis, a bottom mold frame, a data PCB, and a PCB cover shown in FIG. 1, and FIG. 4 is a top chassis and a bottom chassis of the liquid crystal display 100 shown in FIG. 3. A plan view and a side view of the mold frame, and FIG. 5 is an enlarged view of a portion A shown in FIG. 2.

3 to 5, the coupling relationship between the top chassis, the bottom chassis, the bottom mold frame, the data PCB, and the PCB cover will be described in detail.

As shown in FIG. 4, the four sidewalls 121, 122, 123, and 124 of the top chassis 120 are provided with a plurality of defect grooves 121a, 122a, 123a, and 124a, and the four bottom mold frames 170 may be formed. The side walls 171, 172, 173, and 174 are provided with a plurality of coupling protrusions 171a, 172a, 173a, and 174a.

Coupling protrusions 171a, 172a, 173a, and 174a are spaced apart from each other so that data TCP 130c may be bent toward the bottom of bottom mold frame 170 so that data PCB 130e may be fixed to the bottom of bottom mold frame 170. It is.

The plurality of coupling windows 121a, 122a, 123a, and 124a formed on the four sidewalls 121, 122, 123, and 124 of the top chassis 120 may include the sidewalls 171, 172, 173, and 174 of the bottom mold frame 170. Hooks are coupled to a plurality of coupling windows (121a, 122a, 123a, 124a) formed in each.

The bottom chassis 160 is provided between the top chassis 120 and the bottom mold frame 170, and a screw 182 for fixing the data PCB 130e and the PCB cover 180 to the rear surface of the bottom chassis 160. The screw groove 161a is formed to be coupled thereto.

The data PCB 130 is fixed to the bottom of the bottom mold frame 170 and includes a plurality of first coupling holes 131a on the data PCB 130.

The PCB cover 180 has a first sidewall 180b and a second sidewall 180c, a coupling plate 180d, and a third sidewall (not shown) extending from edges facing each other from the cover bottom surface 180a. Consists of

As illustrated in FIG. 2, the first sidewall 180b is provided between a coupling gap between the top chassis 120 and the bottom mold frame 170 that form the hook. The second sidewall 180c has a coupling plate 180d extending from the top of the second sidewall 180c to the outside of the cover bottom surface 180a. The coupling plate 180d includes a plurality of second coupling holes 181a, and is coupled to the screw groove 161a formed on the rear surface of the bottom chassis 160 by the second screw 182. By the coupling, the data PCB 130e is grounded at the bottom chassis 160. The third sidewall (not shown) is extended from the edge of the coupling plate 180d in the extending direction of the second sidewall 180c to cover the screw groove 161a.

The coupling relationship between the top chassis 120, the bottom chassis 160, the bottom mold frame 170, the data PCB 130e, and the PCB cover 180 will be described as a whole.

The data PCB 130e is fixed to the bottom of the bottom mold frame 170, and the PCB cover 180 surrounds the data PCB 130e. The second screw 182 passes through the second coupling hole 181a of the PCB cover 180, the first coupling hole 131a of the data PCB 130e, and the bottom mold frame 170 in the direction D2. Coupling with the screw groove (161a) formed on the back of the (160). That is, as shown in FIG. 5, the PCB cover 180, the data PCB 130e, and the bottom chassis 160 are provided from the bottom and the second screw 182 is coupled thereto.

After the bottom chassis 160, the bottom mold frame 170, the data PCB 130e, and the PCB cover 180 are joined by the second screw 182, the top chassis 120 is coupled to the bottom chassis 160. In order to accommodate the bottom mold frame 170, the data PCB 130e, and the PCB cover 180, the bottom mold frame 170 may be coupled to face the bottom mold frame 170 in the direction D1.

In this case, the coupling windows 121a, 122a, 123a, and 124a of the top chassis 120 are hook-coupled with the coupling protrusions 171a, 172a, 173a, and 174a of the bottom mold frame 170.

However, in the liquid crystal display device 100 as described above, the data PCB 130e is coupled by the bottom chassis 160 and the second screw 182 so that the second screw (in the assembling process of the liquid crystal display device 100) is performed. 182) There is a fear that work failure due to the increase of the number of processes and the wear of the second screw 182 due to the fastening, and the cost of the product is increased by using the second screw 182. In addition, if the second screw 182 is lost or worn due to the separation and coupling of the second screw 182 during repair work, and if the vibration is continuously applied to the liquid crystal display 100, the second screw 182 may be used. There is a fear of loosening, which may cause product defects.

The present invention is to solve this disadvantage of the prior art, an object of the present invention is to reduce the number of steps of the assembly process of the PCB cover and prevent the defects caused by wear of the screw to improve the assembly of the PCB cover To provide.

1 is an exploded perspective view schematically illustrating a conventional liquid crystal display.

2 is a cross-sectional view of a conventional liquid crystal display device.

3 is a perspective view illustrating a coupling relationship between a top chassis, a bottom chassis, a bottom mold frame, a PCB, and a PCB cover of the liquid crystal display illustrated in FIG. 1.

4 is a plan view and a side view of a top chassis and a bottom mold frame of the liquid crystal display illustrated in FIG. 3.

FIG. 5 is an enlarged view of a portion A shown in FIG. 2.

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

7 is a cross-sectional view of a liquid crystal display according to a first embodiment of the present invention.

FIG. 8 is a perspective view illustrating a coupling relationship between a top chassis, a bottom chassis, a bottom mold frame, a PCB, and a PCB cover of the liquid crystal display illustrated in FIG. 6.

9 is a plan view and a side view of a top chassis of the liquid crystal display shown in FIG. 8.

FIG. 10 is a cross-sectional view of a PCB cover of the liquid crystal display shown in FIG. 8.

FIG. 11 is a rear perspective view illustrating a rear structure of a bottom chassis of the liquid crystal display illustrated in FIG. 8.

12 is a perspective view illustrating a PCB cover of a liquid crystal display according to a second exemplary embodiment of the present invention.

13 is a perspective view illustrating a PCB cover of a liquid crystal display according to a third exemplary embodiment of the present invention.

14 is a cross-sectional view of a liquid crystal display according to a third exemplary embodiment of the present invention.

15 is a perspective view illustrating a PCB cover of a liquid crystal display according to a fourth exemplary embodiment of the present invention.

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

100: liquid crystal display device 110, 610: front case

120, 620: top chassis 130, 630: liquid crystal display panel

140, 640: middle mold frame 150, 650: backlight assembly

160, 660: bottom chassis 170, 670: bottom mold frame

180, 680: PCB cover 190, 690: rear case

According to an aspect of the present invention, a liquid crystal display device includes a liquid crystal display panel for receiving light and displaying an image, a backlight assembly for providing light to the liquid crystal display panel, and a liquid crystal display panel. A bottom chassis which is fixed and which has a first frame which is a top chassis having one or more first coupling windows on one side wall, a backlight assembly, and which has one or more annular coupling parts formed on a lower side of the bottom surface, and a storage container A second frame, which is a bottom mold frame coupled to the first frame in an inner side of the first frame, and fixed to a lower side of the second frame to control driving of the liquid crystal display panel. A first sidewall extending from the first edge of the bottom surface, a second sidewall extending from the second edge opposite the first edge, and extending from the top of the second sidewall; Has a coupling plate that is inserted into the coupling part, is provided on the lower side of the second frame comprises a printed circuit board cover for accommodating the printed circuit board.

According to such a liquid crystal display, the first sidewall of the PCB cover is hook-coupled with the top chassis, and the second sidewall is fixed to a ring-shaped coupling portion formed at the bottom of the bottom chassis, thereby reducing screw fastening times and causing a defect due to screw wear. The embossing in contact with the PCB can block the short and EMI of the PCB.

Hereinafter, with reference to the accompanying drawings, it will be described in detail the present invention.

6 is an exploded perspective view of a liquid crystal display according to a first embodiment of the present invention, and FIG. 7 is a cross-sectional view of the liquid crystal display according to the first embodiment of the present invention.

6 and 7, the liquid crystal display 100 includes a front case 610, a top chassis 620 that is a first frame, a liquid crystal display panel 630, a middle mold frame 640, and a backlight assembly 650. ), A bottom chassis 660 that is a storage container, a bottom mold frame 670 that is a second frame, and a rear case 690.

The top chassis 620 is fixed to the liquid crystal display panel 630 by combining with the middle mold frame 640 provided above the bottom mold frame 680 by a screw 625 and a plurality of first couplings on one sidewall. A window 621a and a second coupling window 621b are provided.

The liquid crystal display panel 630 is a color filter substrate 630a in which a predetermined color is expressed by RGB color pixels as light passes, a thin film transistor substrate 630b which is a transparent glass substrate on which a thin film transistor on a matrix is formed, and a color. And a liquid crystal (not shown) sealed between the filter substrate 630a and the thin film transistor substrate 630b.

The liquid crystal display panel 630 further includes a data PCB 630e and a gate PCB 630f, and the data and gate PCBs 630e and 630f are connected to the liquid crystal display panel 630 and the data and gate TCPs 630c and 630b. The driving signal and the timing signal are applied to the gate line and the data line of the thin film transistor so as to control the arrangement angle of the liquid crystal and when the liquid crystal is arranged.

The backlight assembly 650 includes an optical sheet 650a, a light guide plate 650b, lamp units 650c and 650d, and a reflector plate 650e. The light guide plate 650b changes the path of the light while guiding the light generated from the lamp units 650c and 650d toward the liquid crystal display panel 630, and a plurality of optical parts to uniform the luminance of the light emitted from the light guide plate 650b on the top. The sheet 650a is provided. The reflecting plate 650e is provided on the rear surface of the light guide plate 650b and reflects the light exiting the rear surface of the light guide plate 650b toward the liquid crystal display panel 630 without being emitted toward the liquid crystal display panel 630 to increase the light efficiency.

The bottom chassis 660 accommodates the backlight assembly 650, cuts and leaves a portion of the bottom surface of the bottom chassis 660 by pressing on the bottom of the bottom chassis 660, and is formed by bending the cut portion. A plurality of coupling parts 661 is provided.

The bottom mold frame 670 accommodates the bottom chassis 660, and one side wall of the bottom mold frame 670 hooks the first coupling protrusion 671 to the first coupling window 621 a formed on the top chassis 620. It is equipped with many.

The data PCB 630e bends the data TCP 630c 180 degrees toward the bottom of the bottom mold frame 670 and is positioned on the bottom of the bottom mold frame 670 to control the driving of the liquid crystal display panel 630.

The PCB cover 680 has one sidewall coupled to the coupling portion 621a of the bottom chassis 660, and the other sidewall is hook coupled with the top chassis 620. The embossing 683 also supports the data PCB 630e and blocks shorts and EMI generated in the data PCB 630e.

FIG. 8 is a perspective view illustrating a coupling relationship between a top chassis, a bottom chassis, a bottom mold frame, a data PCB, and a PCB cover of the liquid crystal display illustrated in FIG. 6, and FIG. 9 is a top chassis of the liquid crystal display illustrated in FIG. 8. FIG. 10 is a cross-sectional view of the PCB cover of the liquid crystal display shown in FIG. 8, and FIG. 11 is a rear perspective view illustrating the rear structure of the bottom chassis of the liquid crystal display shown in FIG. 8.

8 to 11, the coupling relationship between the top chassis, the bottom chassis, the bottom mold frame, the data PCB, and the PCB cover will be described in more detail.

The top chassis 620 has four side walls 621, 622, 623, and 624, and the front side wall 621 of the top chassis 620 includes a plurality of first coupling windows 621a and second coupling windows. 621b, and the right side wall 622, the rear side wall 623, and the left side wall 624 of the top chassis 620 have a plurality of third coupling windows 622a, 623a, and 624a. In addition, as illustrated in FIG. 7, the liquid crystal display panel 630 is fixed by combining the middle mold frame 640 provided on the upper side of the bottom mold frame 670 with the screw 625.

The bottom mold frame 670 houses the bottom chassis 660 and has four sidewalls 671, 672, 673, 674 as shown in FIG. 9. The front side wall 671 of the bottom mold frame 670 has a plurality of first coupling protrusions 671a, and the right side wall 672, the rear side wall 673, and the left side wall 674 of the bottom mold frame are each plural. Three third engaging projections 672a, 673a, and 674a.

The first coupling protrusion 671a may be spaced apart from each other so that the data TCP 630c may be bent by 180 degrees toward the bottom of the bottom mold frame 670, and as illustrated in FIG. 9. The first coupling window 621a provided on the front wall 621 is coupled to the hook.

The third coupling protrusions 672a, 673a, and 674a are the third coupling windows 622a, 623a, and 624a provided in the right side wall 622, the left side wall 623, and the rear side wall 624 of the top chassis 620. And hook.

The bottom chassis 660 is provided between the top chassis 620 and the bottom mold frame 670, and the bottom of the bottom chassis 660 is pressed by pressing to fix one side of the PCB cover 680. A portion of the bottom surface of the bottom chassis 660 is cut out and left, and a plurality of coupling parts 661 are formed by bending the cut portion.

PCB cover 680 has a first sidewall 680b, a second sidewall 680c, a coupling plate 680d, and an embossing 683. The first and second sidewalls 680b and 680c extend from edges facing each other on the cover bottom surface 680a, respectively.

The first sidewall 680b includes a plurality of second coupling protrusions 681, and accommodates the front side wall 671 provided with the first coupling protrusion 671a of the bottom mold frame 670 therein. The second coupling protrusion 681 provided on the first sidewall 680b is hook-coupled with the second coupling window 621b provided on the front side wall 621 of the top chassis 620.

The coupling plate 680d extends from the top of the second sidewall 680c to the outside of the cover bottom surface 680a and includes a plurality of coupling portions 661 formed on the bottom of the bottom chassis 660 as shown in FIG. 10. Is inserted into the D3 direction and fixed.

In addition, as shown in FIG. 11, an embossing 683 is formed on the cover bottom surface 680a of the PCB cover 680 in contact with the data PCB 630e to support the data PCB 630e.

The embossing 683 protrudes upward from the cover bottom surface 680a to contact and support the PCB 630e by pressing, and the joining plate 680d of the PCB cover 680 is formed on the bottom chassis 660. By being grounded at the coupling part 661, short and EMI between a plurality of circuit components provided on the data PCB 630e may be blocked.

In detail, it protrudes from the cover bottom surface 680a, and is in contact with the ground surface on the PCB 630e. Therefore, since the embossing 683 is integrally provided with the PCB cover 680 made of a conductive material, the PCB 630e may be grounded to the bottom chassis 660 contacting one side of the PCB cover 680 through the embossing 683. .

In the above, only one embossing 683 is shown on the cover bottom surface 680a, but the number may be formed according to the PCB 630e. In addition, although the embossing 683 protruding from the cover bottom surface 680a has been described, a member made of a conductive material may be provided on the cover bottom surface 680a to achieve the above object.

For example, the cover bottom surface 683 may be provided with a conductive rubber to support the PCB 630e and to be in electrical communication with the PCB cover 680 to block short and EMI of the PCB 630e.

If the PCB cover 680 is not made of a conductive material, the same purpose can be achieved by coating a film made of the conductive material on the PCB cover 680.

The PCB cover 680 has elasticity, and the coupling plate 680d is inserted into the coupling portion 661 of the bottom chassis 660 in the D3 direction and is then subjected to a force in the D3 direction so that the width W1 of the coupling portion 661 is provided. By sufficiently long, the coupling between the coupling portion 661 and the coupling plate 680d is not separated by an impact or the like.

The coupling relationship between the top chassis 620, the bottom chassis 660, the bottom mold frame 670, the data PCB 630e, and the PCB cover 680 will be described below.

The bottom chassis 660 is accommodated in the bottom mold frame 670, and the data PCB 630e is fixed to the rear surface of the bottom mold frame 670.

The PCB cover 180 encloses the data PCB 130e, the coupling plate 680d of the PCB cover 680 is inserted into the coupling portion 661 of the bottom chassis 660, and the first sidewall 680b is the bottom mold. The front side wall 671 of the frame 670 is stored.

The top chassis 620 is coupled to the bottom mold frame 670 in the direction D1, and the first coupling window 621 a and the third coupling formed on the side walls 621, 622, 623, and 624 of the top chassis 620. The windows 622a, 623a, and 624a, and the second coupling window 621b are provided with the first coupling protrusion 671a and the third coupling protrusion provided on the side walls 671, 672, 673, and 674 of the bottom mold frame 670. 672a, 673a 674a, and the second coupling protrusion 681 provided on the first sidewall 680b of the PCB cover 680 are hook-coupled thereto.

The embossing of the second embodiment, the third embodiment and the fourth embodiment below has the same structure and operation as the embossing of the first embodiment described above, and the second embodiment, the third embodiment, and the following embodiment Detailed description of the embossing in the fourth embodiment will be omitted.

12 is a perspective view showing a PCB cover according to a second embodiment of the present invention.

Referring to FIG. 12, the PCB cover 680 includes a first sidewall 680b and a second sidewall 680c extending from edges facing each other on the cover bottom surface 680a of the PCB cover 680, and the first and second sidewalls 680c. Third and fourth sidewalls 684 and 685 provided between the second sidewalls 680b and 680c and extending from edges facing each other on the cover bottom surface 680a, respectively, and from the top of the second sidewall 680c. It has an engaging plate 680d extending out of the bottom surface 680a and an embossing 683 protruding from the cover bottom surface 680a.

The first sidewall 680b includes a plurality of second coupling protrusions 681, and hooks with the second coupling window 621b formed on the front side wall 621 of the top chassis 620 shown in FIG. 8.

Both end portions of the second sidewall 681c and the coupling plate 680d are opened by the widths W4 and W5 corresponding to the widths W2 and W3 of the bottom mold frame 670 shown in FIG. 8 to open the bottom mold frame 670. I receive it. In other words, the second sidewall 681c and the coupling plate 680d are provided as shorter as W4 and W5 on both sides than the opposing first sidewall 680b.

The coupling plate 681d is inserted into and fixed to the plurality of coupling parts 661 formed on the rear surface of the bottom chassis 660 shown in FIG. 8.

FIG. 13 is a perspective view illustrating a PCB cover of a liquid crystal display according to a third exemplary embodiment of the present invention, and FIG. 14 is a cross-sectional view of the liquid crystal display according to the third exemplary embodiment of the present invention.

13 and 14, the PCB cover 1130 protrudes from the first sidewall 680b, the second sidewall 680c, the coupling plate 680d, and the cover bottom surface 680a of the PCB cover 1130. Embossed 683. The first and second sidewalls 680b and 680c extend from edges facing each other on the cover bottom surface 680a, respectively.

The first sidewall 680b includes a plurality of second coupling protrusions 681, and accommodates a sidewall having the first coupling protrusion 671a of the bottom mold frame 670 therein. The second coupling protrusion 681 provided on the first sidewall 680b is hook-coupled with the second coupling window 621b provided on the sidewall of the top chassis 620. The coupling plate 680d extends from the top of the second sidewall 680c to the inside of the cover bottom surface 680a and has a plurality of coupling parts 661 formed on the bottom of the bottom chassis 660 as shown in FIG. 14. It is inserted into and fixed.

The coupling part 661 formed on the bottom of the bottom chassis 660 is included in the PCB cover 1130, and the coupling plate 680d is opened in the extending direction.

15 is a perspective view illustrating a PCB cover of a liquid crystal display according to a fourth exemplary embodiment of the present invention.

The PCB cover 1150 includes a first sidewall 680b and a second sidewall 680c extending from edges facing each other on the cover bottom surface 680a of the PCB cover 1150, and the first and second sidewalls 680b, The third and fourth sidewalls 684 and 685 provided between the 680c and extending from edges opposite to the cover bottom surface 680a, respectively, and from the top of the second sidewall 680c to the cover bottom surface 680a. It has an engagement plate 680d extending inwardly and an embossing 683 protruding from the cover bottom surface 680a.

The first sidewall 680b includes a plurality of second coupling protrusions 681, and hooks with the second coupling window 621b formed on the front side wall 621 of the top chassis 620 shown in FIG. 8.

Both side ends of the second side wall 681c and the coupling plate 680d are opened by the widths W4 and W5 corresponding to the widths W2 and W3 of the bottom mold frame 670 shown in FIG. 8, so that the bottom mold shown in FIG. The frame 670 is stored. That is, the second sidewall 681c and the coupling plate 680d are provided to be shorter by W4 and W5 on both sides than the opposing first sidewall 680b.

The coupling plate 681d is inserted into and fixed to the plurality of coupling parts 661 formed on the rear surface of the bottom chassis 660 shown in FIG. The coupling part 661 is included in the PCB cover 1150, and the coupling plate 680d is opened in a direction extending from the top of the second sidewall 680c.

In the above case, the liquid crystal display device having the data PCB and the gate PCB are described as an example, but the present invention can be applied to the integrated PCB in which the data PCB and the gate PCB are integrally provided. Also, in the above case, the liquid crystal display device is described as an example, but the present invention can be applied to other flat panel display devices such as EL and PDP in which the PCB as described above is used.

Although described above with reference to the embodiments, those skilled in the art can be variously modified and changed within the scope of the present invention without departing from the spirit and scope of the invention described in the claims below. I can understand.

As described above, according to the present invention, by not using a screw when combining the PCB cover with the bottom chassis, eliminating the man-hour of screw fastening operation, it is possible to prevent the occurrence of defects due to screw wear, inside the PCB cover The embossing formed in the PCB may prevent the short circuit generated from the PCB by grounding the PCB with the bottom chassis, and may affect the liquid crystal display panel by shielding the EMI.

Claims (6)

A liquid crystal display panel configured to receive light and display an image; A backlight assembly providing the light to the liquid crystal display panel; A first frame fixing the liquid crystal display panel and having one or more first coupling windows on one sidewall thereof; A storage container accommodating the backlight assembly and having one or more annular coupling parts formed on a lower side of a bottom surface thereof; A second frame accommodating the storage container and coupled to face the first frame inwardly of the first frame; A printed circuit board fixed to a lower side of the second frame to control driving of the liquid crystal display panel; And A first sidewall extending from a first edge of the cover bottom surface, a second sidewall extending from a second edge opposite the first edge, and a coupling plate extending from an upper portion of the second sidewall and inserted into the coupling portion; And a printed circuit board cover provided below the second frame and accommodating the printed circuit board. The printed circuit board of claim 1, wherein the printed circuit board cover further includes an embossing protruding from a bottom surface of the cover, wherein the embossing is in contact with the printed circuit board to support the printed circuit board, and the printed circuit board is stored in the receiving container. Liquid crystal display characterized in that the grounding. The cover of claim 2, wherein the printed circuit board cover further comprises a third sidewall extending from a third edge of the cover bottom surface and a fourth sidewall extending from a fourth edge of the cover bottom surface to face the third sidewall. And the second sidewall and the coupling plate are shorter in width than the first sidewall to accommodate the second frame. The liquid crystal display of claim 3, wherein the first sidewall has one or more first coupling protrusions protruding outward from the bottom surface of the cover and hooking the first coupling window. The method of claim 4, wherein the joining plate extends from the top of the second side wall to the outside of the bottom surface of the cover, the joining portion cuts a portion of the bottom surface and bends the cut portion toward the joining plate direction. A liquid crystal display device, characterized in that formed. The method of claim 4, wherein the coupling plate extends from the top of the second sidewall to the inside of the bottom surface of the cover, and the coupling portion is formed by cutting a portion of the bottom surface and bending the cut portion toward the coupling plate. A liquid crystal display device, characterized in that.