KR100512090B1 - Liquid crystal display device - Google Patents

Abstract

A liquid crystal display device having improved image quality is disclosed. The mold frame includes a first accommodating part and a second accommodating part. The second accommodating portion is formed to have a predetermined depth from the base surface of the first accommodating portion. The lamp assembly is disposed in the receiving area defined by the base surface and the side surface of the second housing portion and the base surface of the first housing portion. A portion of the unwanted frequency shielding member is disposed between the bottom surface of the first accommodating portion corresponding to the lamp assembly and the liquid crystal display panel, thereby preventing the unwanted frequency generated from the lamp assembly from being transmitted to the liquid crystal display panel. The top chassis is fastened to the mold frame and is in contact with the rest of the unnecessary frequency shielding member to shield and ground the unnecessary frequency. Therefore, the interference between the high frequency signal applied to the liquid crystal display panel and the unwanted frequency is prevented, thereby improving the image quality of the liquid crystal display panel. Is improved.

In addition, when fabricating a liquid crystal display panel, a ground pattern is formed in a predetermined region of a TFT substrate corresponding to the lamp assembly, and the ground pattern and the ground wiring of the gate printed circuit board are interconnected by a dummy wiring of TCP so that it is unnecessary to flow into the liquid crystal display panel. By grounding the frequency, it is possible to prevent the image quality of the liquid crystal display panel from deteriorating due to the interference of the unnecessary frequency.

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY DEVICE}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a noise grounding device of a liquid crystal display device, and more particularly, an interference frequency emitted from a lamp assembly and a resonance frequency of the liquid crystal display panel cause mutual interference, and thus the horizontal direction of the liquid crystal display panel. The present invention relates to a liquid crystal display device in which an unnecessary frequency shielding member is disposed or a grounding portion is formed in the liquid crystal display panel in order to prevent wave noise from occurring.

Recently, the liquid crystal display device, which has been spotlighted as a substitute for cathode ray tube (CRT) due to its small size, light weight, and low power consumption, is a display device using the electro-optic properties of liquid crystal injected into the liquid crystal display panel. .

Generally used transmissive liquid crystal display device is a light-receiving element that does not emit light, so a backlight assembly for generating light and transmitting light toward the liquid crystal display panel is required. The performance of the backlight assembly is largely dependent on the liquid crystal display device itself.

Recently, as the liquid crystal display device is thin and short, the components included in the backlight assembly, such as a lamp assembly, a light guide plate, a printed circuit board, and the like, have become smaller, thinner, and lighter.

In addition, the effective area of the screen of the liquid crystal display panel is increased so that the liquid crystal display device has a high quality and a large screen. Accordingly, the backlight assembly and the liquid crystal display panel are partially overlaid and the separation distance between the two is gradually reduced.

As a result, a high frequency signal for driving the lamp assembly may cause interference with a high frequency signal applied to the liquid crystal display panel at noise, thereby degrading the image quality of the liquid crystal display device.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and an object of the present invention is to include an unnecessary frequency shielding member which blocks the unwanted frequency emitted from the lamp assembly from being transmitted to the liquid crystal display panel, thereby preventing deterioration in image quality. It is to provide a liquid crystal display device.

Another object of the present invention is to form a grounding pattern on a TFT substrate and to use a dummy lead of a tape carrier package to interconnect the grounding pattern of the TFT substrate and the grounding wiring of the printed circuit board to print the unwanted frequency emitted from the lamp assembly. The present invention provides a liquid crystal display device in which image quality is prevented from being deteriorated by inducing a ground wiring of a substrate.

In order to achieve the above object, the liquid crystal display according to the exemplary embodiment of the present invention includes a mold frame, a backlight assembly, a liquid crystal display panel, an unnecessary frequency shielding member, and a top chassis. The mold frame includes a first accommodating part and a second accommodating part. The second accommodating part is disposed to have a predetermined depth from a base surface of the first accommodating part. The backlight assembly includes a lamp assembly, a reflecting plate, a light guide plate, and an optical sheet. The lamp assembly is disposed in an accommodation area defined by a base surface and a side surface of the second housing portion and a base surface of the first housing portion. The reflecting plate, the light guide plate, and the optical sheets are sequentially disposed on the bottom surface of the second accommodating portion. The liquid crystal display panel is disposed in the first accommodating part and displays an image based on light provided from the backlight assembly. The unwanted frequency shielding member is partially disposed between the bottom surface of the first accommodating portion corresponding to the lamp assembly and the liquid crystal display panel. The unwanted frequency shielding member blocks the unwanted frequency generated from the lamp assembly from being transmitted to the liquid crystal display panel. The top chassis covers the edge of the liquid crystal display panel and is fastened to the mold frame. The top chassis contacts the remainder of the unwanted frequency shielding member to shield and ground the unwanted frequency with the unwanted frequency shielding member.

Optionally, said unwanted frequency shielding member comprises a conductive thin film, a conductive tape and an insulating tape. The conductive tape is attached to one surface of the conductive thin film to attach the conductive thin film to the mold frame. The insulating tape is attached to the other surface of the conductive film thin film facing the one surface, and attaches the conductive thin film to the liquid crystal display panel. Preferably, the conductive tape is attached to the entire area of one surface of the conductive thin film, and the insulating tape is only attached to the area of the other surface in contact with the liquid crystal display panel.

Optionally, the unwanted frequency shielding member comprises a conductive paint and an insulating paint. The conductive paint is applied to the mold frame, and the insulating paint is applied to a region in which the liquid crystal display panel contacts the conductive paint.

Optionally, the mold frame further includes sidewalls forming side surfaces of the first and second accommodating portions, wherein the remainder of the unwanted frequency shielding member extends to an upper portion of the sidewall, or has an upper portion of the sidewall. It is bent along and extends to the outer surface of the side wall.

In order to achieve the object of the present invention, another liquid crystal display device comprises: a mold frame having an accommodation space formed thereon; A lamp assembly disposed on the side of the storage space, a backlight assembly configured to sequentially load from a base surface of the storage space, a light guide plate, and sheets; A liquid crystal display panel disposed on the backlight assembly, the TFT substrate having a ground pattern formed in a direction corresponding to the lamp assembly, and a color filter substrate attached to face the TFT substrate; A printed circuit board on which driving devices for driving a liquid crystal display panel are mounted, and a ground wiring for grounding electromagnetic waves emitted from the driving device in a predetermined region; Dummy that provides an undesired ground path by interconnecting the drive driver IC for driving the liquid crystal display panel, the output wiring connected to the liquid crystal display panel, the input wiring connected to the printed circuit board, and the ground pattern and the ground wiring. TCP composed of wiring; And a top chassis fastened to the mold frame to support the liquid crystal display panel.

Preferably, an auxiliary ground pattern is formed in a predetermined region of the color filter substrate corresponding to the ground pattern to improve the grounding efficiency of the unwanted frequency, and the ground pattern and the auxiliary ground pattern are interconnected, while the ground pattern and the auxiliary ground pattern are The liquid crystal is formed outside the cell gap injected between the TFT substrate and the color filter substrate.

Hereinafter, embodiments of the liquid crystal display according to the present invention will be described in detail with reference to FIGS. 1 to 4.

Liquid crystal display

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

Referring to FIG. 1, the liquid crystal display device 1 includes a mold frame 10, a backlight assembly 20, a liquid crystal display panel 30, an unwanted frequency shielding member 40, and a top chassis 50.

The mold frame 10 includes a first accommodating part 12 and a second accommodating part 14. The second accommodating part 14 is disposed to have a predetermined depth from the bottom surface of the first accommodating part 12. In FIG. 1, the mold frame 10 includes a bottom plate, a first sidewall, and a stepped portion to form the first accommodating part 12 and the second accommodating part 14. The first side wall extends from an edge of the bottom plate, and the stepped portion protrudes from the first side wall to face the bottom plate.

Accordingly, the bottom plate, the first side wall and the stepped portion define the first accommodating part 12 and the second accommodating part 14. In detail, the bottom plate is a base surface of the second accommodating part 14, and the stepped part is a base surface of the first accommodating part 12, and the first sidewall is connected to the first accommodating part 12. The side surface of the 2nd accommodating part 14 is formed.

The backlight assembly 20 includes a lamp assembly 22, a reflecting plate 24, a light guide plate 26, and an optical sheet 28.

The lamp assembly 22 is disposed in an accommodating area defined by a base surface and a side surface of the second accommodating portion 14 and a base surface of the first accommodating portion 12. Preferably, the lamp assembly 22 is disposed at the long side edge of the bottom surface of the second housing portion 14.

The lamp assembly 22 includes a lamp and a lamp reflector. The lamp is, for example, a fluorescent lamp, and the lamp reflector surrounds the lamp and reflects light emitted from the lamp toward one side of the light guide plate 26 to be described later.

The reflecting plate 24, the light guide plate 26, and the optical sheets 28 are sequentially disposed on the bottom surface of the second accommodating portion 14. The light guide plate 26 guides the light provided from the lamp assembly 22 and exits the upper portion of the first accommodating part 12. The reflector 24 is disposed between the base surface of the second accommodating part 14 and the light guide plate 26 to re-inject light leaked from the light guide plate 26 into the light guide plate 26 to improve light utilization efficiency. Improve. The optical sheets 28 are disposed on the light guide plate 26 to improve optical characteristics of light emitted from the light guide plate 26.

The liquid crystal display panel 30 is disposed in the first accommodating part 12 to display an image based on the light provided from the backlight assembly 20. The liquid crystal display panel 30 includes a thin film transistor substrate 31 and a color filter substrate 35 facing each other, and a liquid crystal layer (not shown) disposed between the substrates.

The thin film transistor substrate 31 includes a glass substrate, a plurality of data lines disposed on the glass substrate, and a plurality of gate lines intersecting the data lines. The pixel electrode is disposed in the pixel areas surrounded by the data lines and the gate lines. A data signal is applied to the data lines, and a selection signal for selecting a pixel electrode to which the data signal is applied is applied to the gate lines.

The color filter substrate 35 includes a glass substrate, a color filter, and a common electrode. The color filter is disposed on the glass substrate to correspond to the pixel area. The common electrode is disposed in an entire area of the glass substrate on which the color filter is disposed.

The planar area of the color filter substrate 35 is smaller than the planar area of the thin film transistor substrate 31. As a result, the short side edge region and the long side edge region of the thin film transistor substrate 31 are exposed to the outside of the color filter substrate 35. Here, the short side edge region of the thin film transistor substrate 31 exposed to the outside of the color filter substrate 35 is defined as a gate region, and the long side edge region of the thin film transistor substrate 31 is defined as a source region. do.

The electric field generated by the potential difference applied to the pixel electrode and the common electrode changes the arrangement of the liquid crystal layer, and the transmittance of light passing through the liquid crystal layer is changed, so that the liquid crystal display panel 30 displays an image having a desired gray scale. Display.

A portion of the unwanted frequency shielding member 40 is disposed between the bottom surface of the first accommodating part 12 corresponding to the lamp assembly 22 and the liquid crystal display panel 30. Here, the unwanted frequency shielding member 40 is disposed so as to correspond to the other long side edge region of the thin film transistor substrate 31 facing the source region. The unwanted frequency shielding member 40 blocks the unwanted frequency generated from the lamp assembly 22 from being transmitted to the liquid crystal display panel 30.

To this end, the unwanted frequency shielding member 40 includes a conductive thin film 42, a conductive tape 44 and an insulating tape 46.

The conductive thin film 42 includes a metal having excellent electromagnetic shielding properties, for example, copper. In FIG. 1, a portion of the conductive thin film 42 is attached to the bottom surface of the first accommodating part 12, and the remainder of the conductive thin film 42 is an upper portion of the first sidewall of the mold frame 10. It extends to be attached to the upper side of the first sidewall of the mold frame 10. In another embodiment, the unwanted frequency shielding member 40 may extend to the outer surface of the first side wall.

The conductive tape 44 is attached to one surface of the conductive thin film 42 to attach the conductive thin film 42 to the mold frame 10. Preferably, the conductive tape 44 is attached to the entire area of one surface of the conductive thin film 42.

The insulating tape 46 is attached to the other surface of the conductive film thin film facing the one surface, and attaches the conductive thin film 42 to the liquid crystal display panel 30. Preferably, the insulating tape 46 is attached only to a portion of the other surface corresponding to the bottom surface of the first accommodating part 12 in which the liquid crystal display panel 30 is disposed.

Accordingly, the liquid crystal display panel 30 is insulated from the conductive thin film 42 by the insulating tape 46. As a result, the data lines and the gate lines of the liquid crystal display panel 30 are prevented from shorting due to the unwanted frequency shielding member 40.

The top chassis 50 covers the edge of the liquid crystal display panel 30 and is fastened to the mold frame 10. To this end, the top chassis 50 includes a top plate and a second side wall. The upper plate covers an edge of the liquid crystal display panel 30. The second side wall extends from the top plate and is fastened to the first side wall of the mold frame 10.

At this time, the inner surface of the top plate of the top chassis 50 and the rest of the unwanted frequency shielding member 40 are in contact with each other. Accordingly, the unwanted frequency generated from the lamp assembly 22 is induced to flow to the top chassis 50 through the unwanted frequency shielding member 40. The top chassis 50 is grounded, and the unwanted frequency is emitted to the outside. That is, the unwanted frequency shielding member 40 and the top chassis 50 shield and ground the unwanted frequency from the liquid crystal display panel 30.

As a result, the unwanted frequency does not interfere with the high frequency signal applied to the liquid crystal display panel 30, and the liquid crystal display panel 30 displays a normal image.

2 is a partial cross-sectional view of a liquid crystal display according to a second exemplary embodiment of the present invention.

Referring to FIG. 2, the liquid crystal display device 1 is substantially the same as the liquid crystal display device 1 shown in FIG. 1 except for the unnecessary frequency shielding member 40, and thus the same components are the same. Reference numerals are omitted, and redundant description thereof is omitted.

In FIG. 2, the unwanted frequency shielding member 40 includes a conductive paint 47 and an insulating paint 48.

The conductive paint 47 is applied to a base surface of the first accommodating part 12 and an upper surface of the first sidewall of the mold frame 10 and an outer surface of the first sidewall. In another embodiment, the conductive paint 47 may be applied only to the base surface of the first accommodating part 12 and the upper portion of the first sidewall of the mold frame 10.

The insulating paint 48 is applied on the conductive paint 47. Specifically, the insulating paint 48 is applied to a portion of the conductive paint 47 corresponding to the base surface of the first accommodating part 12 on which the liquid crystal display panel 30 is seated.

An assembling process of the liquid crystal display device 1 configured as described above will be described with reference to FIG. 1.

First, the lamp assembly 22 is disposed at the long side edge of the bottom surface of the second accommodating portion 14, and then the reflecting plate 24, the light guide plate 26, and the optical sheets 28 are sequentially stacked. . Subsequently, to shield the unwanted frequency emitted from the lamp assembly 22, the base surface of the first accommodating part 12 corresponding to the lamp assembly 22 and the upper side of the first sidewall of the mold frame 10 may be disposed. An unnecessary frequency shielding member 40 is disposed.

Thereafter, the liquid crystal display panel 30 is disposed on the bottom surface of the first accommodating part 12. Finally, the top chassis 50 is covered on the mold frame 10 so as to surround the edge predetermined region of the liquid crystal display panel 30 and the side surface of the liquid crystal display panel 30, and the mold frame 10. The top chassis 50 is fixed to the side. In this case, since the top chassis 50 is covered at the top of the mold frame 10 and fixed to the side surface, the inner surface of the top plate of the top chassis 50 is in contact with the unnecessary frequency shielding member 40.

As described above, the unwanted frequency shielding member 40 covers the other long side edge region of the liquid crystal display panel 30 facing the source region. Therefore, the unwanted frequency emitted from the lamp assembly 22 is induced toward the top chassis 50 through the unnecessary frequency shielding member 40, and the top chassis 50 grounds the induced unwanted frequency to the The unwanted frequency is prevented from flowing into the liquid crystal display panel 30.

3 is a partial cross-sectional view of a liquid crystal display according to a third exemplary embodiment of the present invention. 4 is a partial perspective view of the liquid crystal display panel illustrated in FIG. 3.

Referring to FIGS. 3 and 4, the configuration of the liquid crystal display according to the third exemplary embodiment will be described. The lamp assembly 122, the reflector 124, the light guide plate 126, and the storage space formed in the mold frame 110 may be described. The backlight assembly 120 including the sheets 128 is accommodated, and a liquid crystal display panel 130 is disposed on the upper portion of the backlight assembly 120 to display information by using the electro-optical properties of the liquid crystal.

The liquid crystal display panel 130 includes a TFT substrate 131 and a color filter substrate 135 attached to face the TFT substrate 131, and liquid crystal is disposed between the TFT substrate 131 and the color filter substrate 135. An implanted tens of μm cell gap 136 is formed. 4, a plurality of gate lines 132 and ground patterns 134 are formed in a horizontal direction of the TFT substrate 131, and gate lines 132 and a gate line 132 are formed in a vertical direction of the TFT substrate 131. A plurality of intersecting data lines 133 are formed, and input pads 132 are formed at ends of the gates and data lines 132 and 133. The gate gaps 132 and the data lines 133 have a cell gap. The gate input pad 132 and the data input pads 133 are exposed to the outside of the color filter substrate 135. The region where the gate input pad 132 is exposed is called a gate region 137. The region where the data input pads 133 are exposed is called a source region 138. In addition, the ground pattern 134 is formed outside the cell gap 136 and corresponds to the lamp assembly 122 and the source region 138. It is formed on the long side of the liquid crystal display panel 130 facing the same length as the gate line 132.

Preferably, an auxiliary ground pattern 139 is formed on the color filter substrate 135 corresponding to the ground pattern 134 to improve the grounding efficiency of the unnecessary frequency, and the ground pattern 134 and the auxiliary pattern The ground patterns 139 are interconnected by a laser. Here, since the interval between the TFT substrate 131 and the color filter substrate 135 is minute, when the laser is irradiated to the TFT substrate 131 or the color filter substrate 135, the metal ground pattern 134 and the auxiliary ground The patterns 139 are interconnected while melting in heat.

In addition, as shown in FIG. 4, the gate printed circuit board 160 having the driving element mounted thereon is connected to the gate region 137 by the TCP 170 (here, only the gate printed circuit board is shown. A printed circuit board will be described as an example.) A source printed circuit board (not shown) for applying an electrical signal to the data line 133 is electrically connected to the source region 138 by the TCP 170. Here, an output pad 162 is formed at one end of the gate printed circuit board 160 facing the liquid crystal display panel 130, and a ground for grounding electromagnetic waves generated by the driving device at the edge of the gate printed circuit board 160. The wiring 164 is formed.

On the other hand, the TCP 170 described above is to mount the drive drive IC 172 on one surface of the base film 171 on which the metal wiring 175 is printed. Here, the output wiring 174 is formed on the side of the base film 171 corresponding to the liquid crystal display panel 130 centering on the driving driver IC 172 and the pitch between the metal wirings is minutely printed as the gate input pad 132. In addition, the input film 176 is formed on the side of the base film 171 corresponding to the gate printed circuit board 160 with respect to the drive driver IC 172 and the pitch between the metal lines is wide. It is connected to the output pad 162 of the gate printed circuit board 160. At least one dummy wiring 178 is patterned at both ends of the base film 171 in the longitudinal direction, and the output wiring (dummy) of the dummy wiring 178 is patterned. One end of the side where the 174 is formed is connected to the ground pattern 134, and the other end of the dummy wire 178 of the side where the input wiring 176 is formed is connected to the gate ground wiring 164.

Meanwhile, as shown in FIG. 3, the top chassis 150 for supporting the liquid crystal display panel 130 is fixed to the side of the mold frame 110 on the mold frame 110.

An assembling process of the liquid crystal display device configured as described above and an unnecessary frequency generated in the lamp assembly will be described as follows.

First, the backlight assembly 120 is accommodated in an accommodating space of the mold frame 110. The lamp assembly 122 is disposed at one side of the accommodating space in the longitudinal direction of the accommodating space, and then the reflecting plate 124 and the light guide plate 126 are formed on the base surface of the accommodating space. The sheets 128 are stacked in this order. Thereafter, the liquid crystal display panel 130, which is electrically connected to the gate printed circuit board 160 by the TCP 170, is placed on the backlight assembly 120. A ground pattern formed in a direction opposite to the source region 138. The liquid crystal display panel 130 is disposed so that the 134 corresponds to the lamp assembly 122.

Here, the process of connecting the TCP 170 to the liquid crystal display panel 130 and the gate printed circuit board 160 will be described. The output wiring 174 of the TCP 170 is connected to the gate input pad 132, and the output is performed. One end of the dummy wiring 178 formed on the wiring 174 is attached to the ground pattern 134. Then, the input wiring 176 of the TCP 170 is connected to the output pad 162 of the gate printed circuit board 160. The other end of the dummy wiring 178 formed on the input wiring 176 is connected to the ground wiring 164 formed at the edge of the gate printed circuit board 160.

Meanwhile, when the liquid crystal display panel 130 is placed on the backlight assembly 122, the top chassis 150 surrounding the predetermined region of the edge of the liquid crystal display panel 130 and the side surface of the liquid crystal display panel 130 may be molded in the mold frame 110. ) To prevent the liquid crystal display panel 130 from being separated from the mold frame 110.

As described above, the liquid crystal display panel 130 is disposed on the mold frame 122 so that the ground pattern 134 of the liquid crystal display panel 130 is positioned at the position corresponding to the lamp assembly 122, and the TCP 170 is disposed. When the ground pattern 134 of the liquid crystal display panel 130 and the ground wiring 164 of the gate printed circuit board 160 are interconnected using the dummy wiring 178 of FIG. The dummy wire 178 moves to the ground wire 164 and is grounded at the ground wire 164. In more detail, when the unwanted frequency emitted from the lamp assembly 122 flows toward the liquid crystal display panel 130, the ground pattern 134 and the auxiliary ground pattern 139 absorb the unwanted frequency, and the absorbed unwanted frequency is Since the ground pattern 134 is moved along the dummy wiring 178 to the ground wiring 164 of the gate printed circuit board 160 and grounded, wave noise is not generated in the horizontal direction of the liquid crystal display panel 130.

As described above, the present invention arranges an unwanted frequency shielding member in a predetermined region of a mold frame corresponding to the lamp assembly, shields the unwanted frequency emitted from the lamp assembly from the liquid crystal display panel, and shields the unwanted frequency toward the top chassis. Induce. Therefore, the high frequency signal applied to the liquid crystal display panel is prevented from interfering with the unwanted frequency. As a result, the image quality of a liquid crystal display panel is prevented from falling.

In addition, when manufacturing a liquid crystal display panel, a ground pattern is formed in a predetermined region of the TFT substrate corresponding to the lamp assembly, and the ground pattern and the ground wiring of the gate printed circuit board are interconnected by a dummy wiring of TCP so that it is unnecessary to flow into the liquid crystal display panel. By grounding the frequency, the image quality of the liquid crystal display panel can be prevented from being lowered due to the interference of the unwanted frequency.

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

2 is a partial cross-sectional view of a liquid crystal display according to a second exemplary embodiment of the present invention.

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

4 is a partial perspective view of the liquid crystal display panel illustrated in FIG. 3.

Claims (7)

A mold frame including a first accommodating part and a second accommodating part formed to have a predetermined depth from a base surface of the first accommodating part; A lamp assembly disposed in an accommodating area defined by a bottom surface and a side surface of the second accommodating part and a bottom surface of the first accommodating part, a reflecting plate, a light guide plate, and an optical sheet disposed sequentially on the base surface of the second accommodating part. A backlight assembly; A liquid crystal display panel disposed on the first accommodating part and configured to display an image based on light provided from the backlight assembly; A portion is disposed between the base surface of the first housing portion corresponding to the lamp assembly and the liquid crystal display panel, and shields noise from the unwanted frequency emitted from the lamp assembly from being transmitted to the liquid crystal display panel. absence; And A top chassis covering an edge of the liquid crystal display panel and fastened to the mold frame and in contact with the rest of the unwanted frequency shielding member to shield and ground the unwanted frequency together with the unwanted frequency shielding member. Liquid crystal display device. The method of claim 1, wherein the unwanted frequency shielding member Conductive thin film; A conductive tape attached to one surface of the conductive thin film to attach the conductive thin film to the mold frame; And And an insulating tape attached to the other surface of the conductive film thin film opposite to the one surface to attach the conductive thin film to the liquid crystal display panel. The method of claim 2, wherein the conductive tape is attached to the entire area of the one surface of the conductive thin film, And the insulating tape is attached only to an area of the other surface in contact with the liquid crystal display panel. The liquid crystal display of claim 2, wherein the conductive thin film comprises copper. The method of claim 1, wherein the unwanted frequency shielding member Conductive paint applied to the mold frame; And And an insulating paint applied to a region of the conductive paint to be in contact with the liquid crystal display panel. The method of claim 1, wherein the mold frame further comprises a side wall to form the side of the first housing and the second housing, And the rest of the unwanted frequency shielding member extends to an upper portion of the sidewall. The method of claim 1, wherein the mold frame further comprises a side wall to form the side of the first housing and the second housing, And the remainder of the unwanted frequency shielding member is bent along an upper portion of the sidewall to extend to an outer surface of the sidewall.