KR100456143B1 - Liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display device for protecting the liquid crystal display module from static electricity by improving the grounding force of the liquid crystal display module.

According to the present invention, a liquid crystal panel in which liquid crystal cells are arranged in a matrix form, a printed circuit board for supplying driving signals to the liquid crystal panel, a case surrounding the side of the liquid crystal panel, and a removable electrode between the ground electrode and the case And a grounding clip coupled to the ground to ground the printed circuit board to the case.

According to this configuration, the present invention uses a clip on which the printed circuit board is pushed down by a predetermined inclination while connecting the vertical parts of the top case, and discharges static electricity generated inside the liquid crystal display device to the top case by printing from static electricity. Damage to the driving circuit mounted on the circuit walk can be prevented.

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY DEVICE}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device for protecting a liquid crystal display module from static electricity by improving the grounding force of the liquid crystal display module.

A typical liquid crystal display device is composed of a liquid crystal display module, a driving circuit portion and a case for driving the liquid crystal display module.

The liquid crystal display module comprises a liquid crystal panel comprising liquid crystal cells in which liquid crystal is injected between two glass substrates and arranged in a matrix form, and switch elements for switching signals supplied to the liquid crystal cells, respectively. It consists of a back light unit (Back Light Unit) for irradiating.

Further, in the liquid crystal display module, light sheets for vertically raising light traveling from the backlight unit toward the liquid crystal panel are arranged. The liquid crystal panel, the backlight unit and the light sheet must be fastened in an integrated form to prevent light loss and must be protected from damage by external impact. To this end, a case for a liquid crystal display device formed to surround the backlight unit and the light sheets including the edge of the liquid crystal panel is provided.

The driving circuit unit is mounted on a printed circuit board (hereinafter referred to as "PCB") to drive the liquid crystal panel. In this case, TCP (Tape Carrier Package; "TCP") is used for signal transmission between the liquid crystal panel and the PCB and is directly attached to the lower glass and the PCB using a conductive resin. TCP has a structure in which a single layer or multiple layers of metallic conductive layers are inserted between layers of flexible materials such as polyamide.

Since the liquid crystal display module includes a glass substrate as described above, the case may be easily damaged by an external impact. Thus, a case that surrounds and protects the exterior of the liquid crystal display module is used to prevent damage to the liquid crystal display module due to external impact.

Referring to FIGS. 1 and 2, a conventional liquid crystal display device includes a support main body 4 made of plastic and a top case 2 fastened to the support main body 4 and surrounding the edge of a liquid crystal display module (not shown). do.

The support main 4 is a mold, and the side wall surface thereof is formed into a stepped stepped surface. The innermost layer of the support main 4 is equipped with a backlight unit including a reflector, a light guide plate, an upper / lower diffusion sheet and an upper / lower prism sheet and an unillustrated lamp housing, on which upper and lower polarizers are respectively mounted. The attached liquid crystal panel is stacked. The lamp housing (not shown) of the support main 4 has a lamp built in and is screwed to the support main 4. This lamp is connected to the inverter via plug 12.

The top case 2 is manufactured in the form of a square strip having a flat portion and a side portion bent at right angles to surround the edge of the liquid crystal panel.

The liquid crystal display module is composed of a liquid crystal panel (not shown) and a PCB 6 attached to the liquid crystal panel. This liquid crystal display module is fixed to the support main 4. At this time, the PCB 6 is folded in a form surrounding the rear end of the support main 4 to be positioned at the rear end of the support main 4.

Such a conventional liquid crystal display device is conductive between the ground electrode of the PCB 6 and the top case 2 to protect drive circuits, not shown, mounted on the PCB 6 from static electricity generated in the liquid crystal display device. The tape 8 is attached. That is, the conductive tape 8 is made of aluminum to forcibly ground the ground electrode and the top case 2 of the PCB 6.

However, due to poor adhesion of the conductive tape 8 due to mass production of the liquid crystal display device, wave noise and periodic noise are generated.

3 and 4 are a plan view and a cross-sectional view showing a liquid crystal display device for grounding static electricity generated in the liquid crystal panel.

Referring to FIGS. 3 and 4, a conventional liquid crystal display device includes a support main for stacking a reflection plate 42, a light guide plate 44, and at least one optical sheet 46 therein and supporting the liquid crystal panel 48. 34 and a top case 32 surrounding the support main 34 and surrounding the edge of the liquid crystal panel 48. In addition, a conductive tape 38 attached to the transparent electrode (ITO) 40 formed on the substrate of the liquid crystal panel 48 is further configured to discharge the static electricity generated in the liquid crystal panel 48 to the top case 32. .

The liquid crystal panel 48 includes liquid crystal cells in which liquid crystal is injected between two glass substrates and arranged in a matrix, and switch elements for switching signals supplied to the liquid crystal cells, respectively.

The conductive tape 38 is made of copper or aluminum and attached to two upper and lower portions of the top case 32 to be connected to the transparent electrode 40. Accordingly, the static electricity generated in the liquid crystal panel 48 is grounded and discharged in the order of the transparent electrode 40, the conductive tape 38, and the top case 32.

However, the above-mentioned conductive tape 38 has a small area to be attached to the liquid crystal panel 48, so that the adhesive force is weakened due to high temperature and vibration, and the peeling from the transparent electrode 40 occurs. As a result of the phenomenon in which the conductive tape 38 is peeled off from the transparent electrode 40, poor grounding occurs between the transparent electrode 40 and the top case 32, so that staining occurs in the liquid crystal panel 48 due to static electricity. There is this.

5 is a cross-sectional view of a liquid crystal display for grounding a lamp housing and a top case to prevent noise of a conventional backlight lamp.

Referring to FIG. 5, the liquid crystal display device includes a support main 54 made of plastic and a top case 52 fastened to the support main 54 to surround an edge of a liquid crystal display module (not shown).

The support main 54 is a mold, and the side wall surface thereof is formed into a stepped stepped surface. The innermost layer of the support main 54 is equipped with a back light unit including a reflector plate 62, a light guide plate 64, an upper / lower diffusion sheet and an upper / lower prism sheet 66, and a lamp housing 58, not shown. The liquid crystal panel 68 having the upper and lower polarizing plates 70 and 72 attached thereto is stacked thereon. The lamp housing 58 of the support main 54 has a lamp (not shown) embedded therein and fastened to the support main 54 with a screw 60. This lamp housing 58 is connected to an inverter, not shown, via a plug, not shown.

The top case 52 is manufactured in the form of a rectangular band having a flat portion and a side portion bent at right angles to surround the edge of the liquid crystal panel 48.

In order to prevent noise caused by leakage current of the backlight unit lamp of the liquid crystal display device, the lamp housing 58 and the top case 52 are grounded. To this end, the conductive tape 50 is attached to the rear surface of the lamp housing 58 and the side surface of the top case 52. Accordingly, the leakage current generated in the lamp of the backlight unit is discharged to the top case 52 through the conductive tape 50. Therefore, the noise of the lamp is not generated due to the leakage current generated in the lamp of the backlight unit.

However, since the conductive tape 50 is attached to the lamp housing 58 and the top case 52 on the back of the liquid crystal display, workability is deteriorated. In addition, since the conductive tape 50 is attached by hand, a large amount of defects are generated according to the attaching state of the worker.

Meanwhile, referring to FIG. 6, the LCD 86 and the lamp housing 78 should be basically grounded to prevent noise of the lamp due to static electricity generated inside and a leakage current of the lamp.

To this end, the liquid crystal display includes a first conductive tape 82 for grounding the ground electrode of the PCB 86 to the top case 72 to protect the driving circuits mounted inside the PCB 86 from static electricity, and a lamp. A second conductive tape 80 is provided to ground the housing 78 to the top case 72.

The first conductive tape 82 is attached to the back of the PCB 86 and attached to the top case 72 to ground the PCB 86 to the top case 72. The second conductive tape 80 is attached to the lamp housing 78 and the top case 72 to ground the lamp housing 78 to the top case 72.

Accordingly, the static electricity generated inside the liquid crystal display device is discharged to the top case 72 through the first conductive tape 82, thereby preventing damage to the driving circuit mounted on the PCB 86 due to the static electricity. In addition, noise generated in the lamp may be absorbed by the lamp housing 78 and discharged to the top case 72 through the second conductive tape 80 to reduce noise generated in the lamp.

However, according to the attachment area of the second conductive tape 80 attached between the top case 72 and the lamp housing 78, a grounding deviation between the top case 72 and the lamp housing 78 occurs and the second conductivity The grounding deviation between the top case 72 and the lamp housing 78 occurs depending on the attachment degree of the tape 80. Due to the grounding deviation between the top case 72 and the lamp housing 78, there is a problem that the noise generated in the lamp is not completely removed.

Accordingly, an object of the present invention is to provide a liquid crystal display device for protecting the liquid crystal display module from static electricity by improving the grounding force of the liquid crystal display module.

Another object of the present invention is to provide a liquid crystal display device for reducing the noise of the lamp by improving the grounding force between the lamp housing and the top case.

1 is a plan view showing a liquid crystal display module of a conventional liquid crystal display device.

FIG. 2 is a side perspective view illustrating a portion A of the liquid crystal display module illustrated in FIG. 1.

3 is a plan view showing a conventional liquid crystal display module for grounding the liquid crystal panel.

4 is a cross-sectional view taken along the line BB ′ shown in FIG. 3.

5 is a cross-sectional view showing a conventional liquid crystal display module for grounding the lamp housing.

6 is a plan view showing a conventional liquid crystal display module for grounding the lamp housing and the printed circuit board.

7 is a plan view illustrating a liquid crystal display module of the liquid crystal display according to the first embodiment of the present invention.

FIG. 8 is a side perspective view illustrating a portion C of the liquid crystal display module illustrated in FIG. 7.

9 is a perspective view of the clip shown in FIG. 8;

FIG. 10 is a perspective view of another clip of FIG. 8. FIG.

FIG. 11 is a perspective view of another clip of FIG. 8. FIG.

12 is a plan view illustrating a liquid crystal display module for grounding a liquid crystal panel according to a second exemplary embodiment of the present invention.

FIG. 13 is a perspective view of the clip shown in FIG. 12; FIG.

14 is a perspective view showing the assembly of the clip shown in FIG. 12;

FIG. 15 is a cross-sectional view illustrating a liquid crystal display module for grounding a lamp housing according to a third embodiment of the present disclosure; FIG.

16 is a plan view illustrating a conventional liquid crystal display module for grounding a lamp housing and a printed circuit board for grounding a lamp housing according to a fourth embodiment of the present invention;

FIG. 17 is a sectional view showing the assembly of the frame shown in FIG. 16; FIG.

<Description of Symbols for Main Parts of Drawings>

2, 32, 52, 72, 102, 132, 152, 172: top case

4, 34, 54, 74, 104, 134, 154, 174: Support main

6, 86, 106, 186: printed circuit board

8, 38, 50, 82, 80, 138, 182: conductive tape

42, 62, 142, 162: reflector

44, 64, 144, 164: light guide plate

46, 66, 146, 166: optical sheets 48, 68, 148, 168: liquid crystal panel

108, 130: clip 186: frame

In order to achieve the above object, a liquid crystal display device according to the present invention is a liquid crystal panel in which liquid crystal cells are arranged in a matrix form, a printed circuit board for supplying driving signals to the liquid crystal panel, and formed on the printed circuit board A support main to which the ground electrode, the liquid crystal panel and the printed circuit board are mounted, a case surrounding the edge of the liquid crystal panel and the side of the support main, and a detachable connection between the ground electrode and the case And a ground clip coupled to ground the printed circuit board to the case. The liquid crystal display device is formed at one side of the support main to prevent flow of the printed circuit board in contact with the ground clip. It further comprises a hook.

The ground clip may include a first planar portion covering one end of the edge of the support main, at least two clip portions bent vertically staggered from one end of the first planar portion, and bent downward from the other end of the first planar portion. And a vertical surface portion and an elastic surface portion which is bent horizontally from the vertical surface portion and one end is bent at a predetermined angle.

The clip portion further includes at least one first clip portion connected to the inner side surface portion of the case, and at least one second clip portion connected to the outer side surface portion of the case.

The elastic surface portion includes a second flat portion bent horizontally from the vertical surface portion, and at least two inclined surface portions bent at a predetermined angle from the second flat portion.

The case is characterized in that the conductive metal.

The grounding clip is characterized in that the conductive metal.

According to the present invention, a liquid crystal display device includes a liquid crystal panel, an antistatic transparent electrode formed at one edge of the liquid crystal panel, a case surrounding the side of the liquid crystal panel, and an edge of the liquid crystal panel to be connected to the transparent electrode. And a ground clip electrically connected to the case.

It further comprises a conductive tape adhered to the grounding clip and the case.

The grounding clip includes a “U” shaped bent portion surrounding upper and lower edges and side surfaces of the liquid crystal panel, and an extended surface portion extending from the bent portion toward the case and connected to the conductive tape.

The liquid crystal display according to the present invention includes a backlight unit having a reflective member for reflecting light, a support main on which the backlight unit is mounted, a case in contact with a side surface of the support main, and an extension from one side of the reflective member. A reflection member extension part inserted between the support main and the case to electrically connect the reflection member and the case.

The reflective member extension member is bent to have an elastic force.

The support main may be formed with a protrusion penetrating the reflective member and the case.

Characterized in that each of the holes through which the protrusion of the support main penetrates is formed.

The liquid crystal display according to the present invention includes a backlight unit having a reflective member for reflecting light, a support main on which the backlight unit is mounted, a case in contact with a side surface of the support main, and one side between the case and the support main. And a frame inserted to electrically connect the case and the reflective member.

The frame is characterized in that the bent in the "L" shape.

The reflective member has a protrusion that protrudes to a predetermined height.

The frame has a first hole through which a first screw for fixing the frame to the reflecting member and a second hole through which a second screw for fixing the frame to the support main passes.

The protrusion is inserted into the first hole and is in electrical contact with the head of the first screw.

Other objects and features of the present invention in addition to the above objects will be apparent from the description of the embodiments with reference to the accompanying drawings.

A preferred embodiment of the present invention will be described with reference to FIGS. 7 to 17.

7 and 8, the liquid crystal display according to the first embodiment of the present invention is coupled to the support main 104 made of plastic and the support main 104 to surround the edge of the liquid crystal display module (not shown). It consists of the top case 102.

The support main 104 is a mold, and the side wall surface therein is formed into a stepped stepped surface. The innermost layer of the support main 104 is equipped with a back light unit including a reflector, a light guide plate, an upper / lower diffusion sheet and an upper / lower prism sheet and an unillustrated lamp housing, on which upper and lower polarizers are respectively mounted. The attached liquid crystal panel is stacked. The lamp housing (not shown) of the support main 104 has a lamp built in and is screwed to the support main 104. This lamp is connected to an inverter, not shown, via plug 112.

The top case 102 is manufactured in the form of a rectangular band having a flat portion and a side portion bent at right angles to surround the edge of the liquid crystal panel, and stainless is mainly used as a material.

The liquid crystal display module is composed of a liquid crystal panel (not shown) and a printed circuit board (hereinafter referred to as "PCB") 106 attached to the liquid crystal panel. The PCB 106 is equipped with driving circuits for driving the liquid crystal panel. The liquid crystal display module is fixed to the support main 104. At this time, the PCB 106 is folded in a form surrounding the rear end of the support main 104 to be located at the rear end of the support main 104.

As described above, the liquid crystal display according to the first exemplary embodiment of the present invention protects the driving circuit (not shown) mounted on the PCB 106 from static electricity generated internally. 102 is provided with a clip 108 of a conductive metal material for electrically connecting.

As shown in FIG. 9, the clip 108 is made of the same stainless material as the top case 102, and has a first horizontal surface portion 126 and a second horizontal surface portion 128 installed at the support main 104 with a step. The first and second top case connecting portions 120 and 122 extending vertically downward from the first horizontal surface portion 126 and the PCB connecting portion 124 having a predetermined elastic force are rounded at the ends of the second horizontal surface portion 128. ).

The first and second top case connecting portions 120 and 122 are alternately elongated to be connected to the inner and outer vertical surfaces of the top case 102 between the first and second top case connecting portions 120 and 122 and have a predetermined restoring force. Has The first and second top case connectors 120 and 122 are in force contact with the top case 102 by the restoring force of the first and second top case connectors 120 and 122.

PCB connection 124 is pushed down by the back of PCB 106. To this end, the PCB connection portion 124 is inclined at a predetermined slope to have a predetermined restoring force and is forcibly contacted with the ground electrode of the PCB 106. In this case, a hook 110 is formed in the support main 104 to prevent the PCB 106 from being pushed outward by the restoring force of the PCB connection part 124.

As such, the top case 102 is sandwiched between the first and second top case connections 120 and 122 of the clip 108, and the PCB 106 is connected to the PCB connection 124 of the clip 108. Contact. Accordingly, the static electricity generated inside the liquid crystal display device is discharged to the top case 102 through the PCB connection part 124 of the clip 108 and the first and second top case connection parts 120 and 122.

Meanwhile, as shown in FIG. 10, the clip 108 is made of the same stainless material as the top case 102, and the first horizontal surface portion 126a and the second horizontal surface portion 128a installed on the support main 104 with a step difference. ), A top case connector 125 divided into at least two parts to be in contact with the top case 102, and a PCB connector 127 divided into at least two to be in contact with the PCB 106.

The top case connecting portion 125 includes first and second top case connecting portions 120a and 122a extending downward from the first horizontal surface portion 126a so as to be in contact with the inner surface of the top case 102, and the top case 102. The third top case connecting portion 123a extended downward from the first horizontal surface portion 126a so as to be in contact with the outer side surface of the upper surface portion 126a.

The PCB connection portion 127 is spaced apart from the first PCB connection portion 124a bent at a predetermined slope at the end of the second horizontal surface portion 128a and the first PCB connection portion 124a by a predetermined distance and the end of the second horizontal surface portion 128b. Is composed of a second PCB connection portion 124b bent at a predetermined slope.

In this way, by dividing the top case connecting portion 125 into a plurality, it is possible to diversify the contact with the top case 102. In addition, it is possible to diversify the contact with the PCB 106 by dividing the PCB connection portion 127 into a plurality.

Meanwhile, as shown in FIG. 11, the clip 108 is made of the same stainless material as that of the top case 102, and the first horizontal surface portion 126b and the second horizontal surface portion 128b installed on the support main 104 with a step difference. ), A top case connection part 129 divided into at least two parts to be in contact with the top case 102, and a PCB connection part 124c rounded at an end of the second horizontal surface part 128b and having a predetermined elastic force.

The top case connecting portion 129 is connected to the first top case connecting portion 123b extending downward from the first horizontal surface portion 126b so as to be in contact with the inner surface of the top case 102 and the outer surface of the top case 102. And second and third top case connecting portions 120b and 122b extending downward from the first horizontal surface portion 126b.

The PCB connection portion 127 is composed of a PCB connection portion 124c bent at a predetermined slope at the end of the second horizontal surface portion 128b.

In this way, by dividing the top case connecting portion 129 into a plurality, the contact with the top case 102 can be diversified.

Therefore, the liquid crystal display according to the first exemplary embodiment of the present invention does not use the conductive tape as in the related art, so that wave noise and periodic noise due to the poor adhesion of the conductive tape do not occur.

12 is a cross-sectional view of a liquid crystal display for grounding static electricity generated in a liquid crystal panel.

Referring to FIG. 12, in the liquid crystal display according to the second exemplary embodiment, the reflective plate 142, the light guide plate 144, and at least one optical sheet 146 are stacked therein and support the liquid crystal panel 148. The support main body 134 and the top case 132 surrounding the support main body 134 and surrounding the edge of the liquid crystal panel 148 are configured. In addition, in order to ground the static electricity generated in the liquid crystal panel 148 to the top case 132, the clip 130 is fitted on the antistatic transparent electrode 140 formed on one edge of the substrate of the liquid crystal panel 148, The conductive tape 138 is attached to the clip 130 and attached to the top case 132 to discharge the static electricity generated in the liquid crystal panel 148 to the top case 132.

The liquid crystal panel 148 is composed of liquid crystal cells in which liquid crystal is injected between two glass substrates and arranged in a matrix, and switch elements for switching signals supplied to these liquid crystal cells, respectively. The front and rear surfaces of the liquid crystal panel 148 are provided with polarizing plates 137 and 139. The antistatic transparent electrode 140 is formed at one edge of one of two glass substrates, and allows static electricity generated from the liquid crystal panel 148 to flow to the clip 130.

The clip 130 is a conductive spring plate, as shown in FIG. 13, and has a “U” shape so that two substrates of the liquid crystal panel 148 may be inserted. That is, the clip 130 is composed of a central portion of the "T" shape, and a bending portion that is bent (Bending) in a "U" shape at both ends.

The “U” shaped bending portion is fitted on the substrate of the liquid crystal panel, and the conductive tape 138 is attached to the “T” shaped central portion. The conductive tape 138 is made of copper or aluminum and attached to two upper and lower portions of the top case 132 to be connected to the antistatic transparent electrode 140.

Referring to FIG. 14, the assembly of the clip 130 is described. The clip 130 is inserted into electrical contact with the antistatic transparent electrode 140 formed on the substrate of the liquid crystal panel 148. Then, the conductive tape 138 is attached to the upper side of the clip 130 and then the top case 132 is mounted to electrically contact the conductive tape 138 with the top case 132.

Accordingly, the static electricity generated in the liquid crystal panel 148 is discharged to the top case 132 through the antistatic transparent electrode 140, the clip 130, and the conductive tape 138.

As described above, in the liquid crystal display according to the second exemplary embodiment of the present invention, the attaching of the clip 130 to the liquid crystal panel 148 facilitates the attaching process of the conductive tape 138 and increases the attaching area. As a result, the adhesion is improved.

15 is a cross-sectional view of a liquid crystal display for grounding the lamp housing and the top case 152 in order to prevent noise of the backlight lamp in the liquid crystal display according to the third embodiment of the present invention.

Referring to FIG. 15, the liquid crystal display according to the third exemplary embodiment of the present invention includes a top case 154 which is fastened to the support main 154 made of plastic and the support main 154 to cover the edge of the liquid crystal display module (not shown). 152).

The support main 154 is a mold, and the side wall surface thereof is formed into a stepped stepped surface. The innermost layer of the support main 154 is equipped with a back light unit including a reflector plate 162 (not shown), a light guide plate 164, an upper / lower diffusion sheet and an upper / lower prism sheet 166, and a lamp housing 158. The liquid crystal panel 168 having the upper and lower polarizers 170 and 172 attached thereto is stacked thereon. The lamp housing 158 of the support main 154 has a lamp (not shown) embedded therein and fastened to the support main 154 by a screw 160.

The lamp housing 158 is bent and extended to have an elastic force to contact the inner surface of the top case 152. That is, the lamp housing 158 is bent and extended in the form of an "L" so as to contact the inner surface of the top case 152. A first hole (not shown) is formed in the extended lamp housing 158. The hook 150 protruding from the support main 154 to the side surface of the top case 152 penetrates through the first hole of the lamp housing 158. This lamp housing 158 is connected to an inverter, not shown, via a plug, not shown.

The top case 152 is manufactured in the form of a rectangular band having a flat portion and a side portion bent at right angles to surround the edge of the liquid crystal panel 148. In addition, the top case 152 is formed with a second hole 156 through which the hook 150 formed in the support main 154 passes. This inner surface of the top case 152 is in contact with the lamp housing 158 described above.

The hook 150 formed in the support main 154 penetrates through the first hole of the lamp housing 158 and passes through the second hole of the top case 152 so that the lamp housing 158 is always in the top case 152. The earth is grounded.

In order to prevent noise caused by leakage current of the backlight unit lamp of the liquid crystal display device, the lamp housing 158 is extended to be in contact with the inner surface of the top case 152. In addition, by adding a bending portion to the extended lamp housing 158, the lamp housing 158 is forcibly brought into contact with the top case 152.

Accordingly, the leakage current generated in the lamp of the backlight unit is discharged to the top case 152 through the extended lamp housing 158. Therefore, the noise of the lamp is not generated due to the leakage current generated in the lamp of the backlight unit.

Meanwhile, referring to FIGS. 16 and 17, the LCD 186 and the lamp housing 176 should basically be grounded to prevent noise of the lamp due to static electricity generated inside and a leakage current of the lamp.

To this end, the liquid crystal display according to the third embodiment of the present invention includes a support main 174 on which a PCB 186 and a lamp housing 176 are mounted to protect driving circuits mounted in the PCB 86 from static electricity. And a first conductive tape 182 for grounding the PCB 186 to the top case 172, and a frame 186 for grounding the lamp housing 176 to the top case 172.

The support main 174 is a mold, and the side wall surface thereof is formed into a stepped stepped surface. The innermost layer of the support main 174 is equipped with a back light unit including a reflector, a light guide plate, an upper / lower diffusion sheet, and an upper / lower prism sheet and a lamp housing 178, and an upper and lower part not shown thereon. The liquid crystal panel attached to each of the polarizing plates is mounted, and the PCB 186 attached to one side of the liquid crystal panel is mounted.

The first conductive tape 182 is attached to the back of the PCB 186 and attached to the top case 172 to ground the PCB 186 to the top case 172.

The frame 186 is installed on the upper surface of the boundary between the lamp housing 176 and the support main 174 to ground the lamp housing 176 to the top case 172. To this end, the frame 186 is bent in a "L" shape is composed of a vertical portion that is connected to the top case 172, and a horizontal portion is installed on the upper surface of the lamp housing 176 and the support main 174.

In the vertical portion of the frame 186, a first hole 194 through which the first screw 184 penetrates is formed to fix the frame 186. In order to correspond to the first hole 194 of the frame 186, the support main 174 is formed with a first screw hole (not shown) to which the first screw 184 is screwed. In addition, a second hole 192 is formed in the top case 172 to correspond to the first hole 194 of the frame 186 and the first screw hole of the support main 174.

The first screw 184 penetrates through the second hole 192 of the top case 172 and the first hole 194 of the frame 186 to be screwed into the first screw hole of the support main 174 to thereby frame 186. ) Is in contact with the top case 172.

In the horizontal portion of the frame 186, a third hole 195 is formed through which the second screw 181 penetrates the lamp housing 178. In addition, a second screw hole 191 is formed on the upper surface of the lamp housing 178 to be engaged with the second screw 181 penetrating through the third hole 195 of the frame 186. Protruding portion 177 is formed to protrude to a predetermined height so as to contact the head of the.

The second screw 181 penetrates through the third hole 195 of the frame 186 and is screwed with the second screw hole 191 of the lamp housing 176, thereby attaching the lamp housing 178 to the top case 172. Make contact. That is, the lamp housing 178 is in contact with the top case 172 through the protrusion 177, the second screw 181, the horizontal portion and the vertical portion of the frame 186 formed in the lamp housing 178.

Accordingly, in the liquid crystal display according to the fourth embodiment of the present invention, the static electricity generated therein is discharged to the top case 172 through the first conductive tape 182, and thus, the driving circuit mounted on the PCB 186 due to the static electricity. Damage to the furnace can be prevented. In addition, noise generated in the lamp may be absorbed in the lamp housing 178 and discharged to the top case 172 through the frame 186 to reduce noise generated in the lamp.

As described above, the liquid crystal display according to the present invention uses a clip in which the printed circuit board is pressed down by a predetermined tilt while being connected to each other with the vertical portion of the top case interposed therebetween, and the static electricity generated inside the liquid crystal display device is top case. The discharge can be prevented from damaging the drive circuit mounted on the printed circuit board from static electricity.

In addition, the static electricity generated in the liquid crystal panel of the liquid crystal display device is contacted with the transparent electrode of the liquid crystal panel using a U-shaped clip instead of the conductive tape, and the conductive tape is attached to the clip to increase the adhesion area of the conductive tape. Can be discharged efficiently.

In addition, by extending the lamp housing in contact with the top case it is possible to improve the grounding power of the lamp housing to reduce the noise caused by the leakage current generated in the lamp. On the other hand, by contacting the lamp housing and the top case by using a frame, it is possible to minimize the malfunction caused by using the conductive tape.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (19)

A liquid crystal panel in which liquid crystal cells are arranged in a matrix form; A printed circuit board for supplying driving signals to the liquid crystal panel; A ground electrode formed on the printed circuit board; A support main on which the printed circuit board is mounted while supporting the liquid crystal panel; A case surrounding an edge of the liquid crystal panel and a side surface of the support main; And a grounding clip detachably coupled between the ground electrode and the case to ground the printed circuit board to the case. The method of claim 1, And a hook formed on one side of the support main to prevent the printed circuit board from flowing in contact with the ground clip. The method of claim 1, The grounding clip, A first flat portion covering one end of an edge of the support main; At least two clip portions bent perpendicularly to each other from one end of the first planar portion, A vertical surface portion bent downward from the other end of the first flat portion, And an elastic surface portion which is bent horizontally from the vertical surface portion and whose one end is bent at a predetermined angle. The method of claim 3, wherein The clip unit, At least one first clip portion connected to an inner surface portion of the case; And at least one second clip portion in contact with an outer surface portion of the case. The method of claim 3, wherein The elastic surface portion A second flat portion bent horizontally from the vertical surface portion; And at least two inclined surface portions that are bent at a predetermined angle from the second planar portion. The method of claim 1, And the case is made of metal. The method of claim 1, The grounding clip is a liquid crystal display, characterized in that the metal. LCD panel, An antistatic transparent electrode formed at one edge of the liquid crystal panel; A case surrounding the side of the liquid crystal panel; And a ground clip surrounding one edge of the liquid crystal panel to be connected to the transparent electrode and electrically connected to the case. The method of claim 8, And a conductive tape attached to the ground clip and the case. The method of claim 8, The ground clip is a "U" -shaped bent portion surrounding the upper and lower edges and sides of the liquid crystal panel, And an extending surface portion extending from the bent portion toward the case and to which the conductive tape is connected. A backlight unit having a reflective member for reflecting light; A support main on which the backlight unit is mounted; A case connected to the side of the support main; And a reflection member extension portion extending from one side of the reflection member and inserted between the support main and the case to electrically connect the reflection member and the case. The method of claim 11, And the reflective member extension member is bent to have an elastic force. The method of claim 11, And a protruding portion penetrating the reflective member and the case in the support main. The method of claim 13, And a hole through which the protrusion of the support main penetrates, respectively. A backlight unit having a reflective member for reflecting light; A support main on which the backlight unit is mounted; A case connected to the side of the support main; And a frame inserted at one side between the case and the support main to electrically connect the case and the reflective member. The method of claim 15, And the frame is bent in an "L" shape. The method of claim 15, And the reflective member has a protrusion projecting to a predetermined height. The method of claim 15, The frame, A first hole through which the first screw for fixing the frame to the reflective member passes; And a second hole through which a second screw for fixing the frame is attached to the support main. The method of claim 17 or 18, And the protrusion is inserted into the first hole and is in electrical contact with the head of the first screw.