KR20020010401A - Liquid crystal display device - Google Patents

Abstract

PURPOSE: A liquid crystal display is manufactured in a structure that a gate signal is directly applied from an integrated printed circuit board to a gate line without having a gate printed circuit board. CONSTITUTION: A liquid crystal display is constructed of a display unit, a backlight assembly, a mold frame(730), a chassis, and a supporting means. The display unit includes a liquid crystal display panel, an integrated printed circuit board on which a source for providing a data driving signal to the liquid crystal display panel through a data line of the panel and a gate for providing a gate driving signal to a gate line of the panel are formed, and a flexible circuit board attached to the panel to transmit the data driving signal or gate driving signal to the liquid crystal display panel. The backlight assembly supplies lights to the display unit. The mold frame for accommodating the liquid crystal display panel and the backlight assembly. The chassis attaches the integrated printed circuit board and the flexible circuit board. The supporting means support the flexible circuit board toward the mold frame.

Description

Liquid crystal display {LIQUID CRYSTAL DISPLAY DEVICE}

The present invention relates to a liquid crystal display device. More particularly, the present invention relates to a liquid crystal display device having a structure for applying a gate signal directly to a gate line in an integrated printed circuit board without a gate printed circuit board.

In general, a liquid crystal display device applies a voltage to a specific molecular array of liquid crystals and converts the same into another molecular array, and changes optical characteristics such as birefringence, photoreactivity, dichroism, and light scattering characteristics of the liquid crystal cell that emit light by the molecular arrangement. It is a display using modulation of the light by a liquid crystal cell by converting into a visual change.

The liquid crystal display device is largely divided into TN (Twisted Nematic) and STN (Super-Twisted Nematic) methods, and due to the difference in driving method, an active matrix display method using a switching element and a TN liquid crystal and a passive matrix using STN liquid crystal There is a passive matrix display method.

The big difference between these two methods is that the active matrix display method is used for TFT-LCD, which drives the LCD using the TFT as a switch, and the passive matrix display method does not use transistors, thus requiring a complicated circuit. Do not LCDs using TFTs are widely used in recent years with the spread of portable computers.

The liquid crystal display includes a liquid crystal panel provided with a liquid crystal for determining whether light is transmitted through an electric signal. Since the liquid crystal panel is a passive optical element that does not emit light by itself, a backlight assembly for providing light to the liquid crystal display device is attached to the rear side of the liquid crystal panel. Further, a liquid crystal panel has a source portion for applying screen data to display a screen and a gate portion for applying a gate signal for driving a gate element of a thin film transistor of the liquid crystal panel. The image signal is applied to the transistors of the liquid crystal panel via these source and gate portions so that the liquid crystal of the liquid crystal panel receives an electrical signal, thereby adjusting the light rays from the backlight assembly to form a screen.

In the LCD module, a method of connecting the source and gate driving drive ICs existing between the liquid crystal panel and the printed circuit board may be classified into a chip-on glass (COG) mounting method and a tape automated bonding (TAB) mounting method. According to the COG mounting method, a drive driver IC in the form of a semiconductor package is directly mounted in a gate region and a data region of a liquid crystal panel to transmit an electrical signal to the liquid crystal panel. The drive drive IC bonds to the liquid crystal panel using an anisotropic conductive film.

On the other hand, according to the TAB mounting method, a printed circuit board and a liquid crystal panel are directly connected by using a tape carrier package equipped with a drive driver IC. One end of the tape carrier package is connected to the liquid crystal panel and the other end is connected to the printed circuit board. At this time, the input wiring of the tape carrier package and the output pad of the printed circuit board are connected by soldering or an anisotropic conductive film.

Examples of liquid crystal panel modules using tape carrier packages are described, for example, in US Pat. No. 5,572,346 (issued to Sakamoto et al.), US Pat. No. 6,061,246 (issued to Oh et al). To date, the TFT liquid crystal module has mainly used a technology for mounting a drive driver IC using a tape carrier package.

Recently, in order to secure the competitiveness of the product, LCD modules having various structures have been developed for slimming and lightening. In particular, in view of the fact that the liquid crystal display device is mainly used in portable computers and the like, the weight reduction is treated more heavily. When the tape carrier package is applied to the LCD module as it is, it is not preferable because of lack of flexibility. Therefore, a flexible circuit board with high flexibility is used for application to the liquid crystal module. As a method of mounting a drive IC on such a flexible printed circuit board, a chip on film (COF) method is used. According to the COF method, a chip is mounted on a printed circuit board using TAB.

In addition, since the weight and volume of LCDs increase as the size of the screen increases, efforts have been made to reduce the area and volume of portions other than the screen while realizing a large screen. For example, according to the invention disclosed in Patent Application No. 99-53932 filed by the applicant of November 30, 1999 and continuing with the Korean Intellectual Property Office, the circuit of the gate portion is integrated into the source portion to form an integrated printed circuit board. The liquid crystal display device of the Mont Blanc panel which manufactured and located in the source side of a liquid crystal panel, and provided only the flexible circuit board by the COF method in the gate side, and reduced the volume of the gate side is disclosed.

1 is an exploded perspective view showing a liquid crystal display device disclosed in the above-mentioned prior application No. 99-53932.

Referring to FIG. 1, the liquid crystal display device 100 includes a liquid crystal display module 200 for displaying an image by applying an image signal, and a front and rear cases 300 and 400 for accommodating the liquid crystal display module 200. Consists of.

The liquid crystal display module 200 includes a display unit 210 including a liquid crystal panel representing a screen.

The display unit 210 includes a liquid crystal display panel 212, an integrated printed circuit board 214, a data side tape carrier package 216, and a gate side flexible circuit board 218. The liquid crystal display panel 212 includes a thin film transistor substrate 212a, a color filter substrate 212b, and a liquid crystal (not shown).

The thin film transistor substrate 212a is a transparent glass substrate on which a matrix thin film transistor is formed. A data line is connected to a source terminal of the thin film transistors, and a gate line is connected to a gate terminal. In addition, a pixel electrode made of indium tin oxide (ITO), which is a transparent conductive material, is formed in the drain terminal.

When electrical signals are input to the data lines and the gate lines, electrical signals are input to the source and gate terminals of the respective thin film transistors, and the thin film transistors are turned on or turned off according to the input of the electrical signals, thereby draining the drain terminals. The furnace outputs an electrical signal necessary for pixel formation.

The color filter substrate 212b is provided to face the thin film transistor substrate 212a. The color filter substrate 212b is a substrate in which RGB pixels, which are color pixels in which a predetermined color is expressed while light passes, are formed by a thin film process. The common electrode made of ITO is coated on the front surface of the color filter substrate 212b.

When power is applied to the gate terminal and the source terminal of the transistor of the thin film transistor substrate 212a and the thin film transistor is turned on, an electric field is formed between the pixel electrode and the common electrode of the color filter substrate. By such an electric field, the arrangement angle of the liquid crystal injected between the thin film transistor substrate 212 and the color filter substrate 214 is changed, and the light transmittance is changed according to the changed arrangement angle to obtain a desired pixel.

A driving signal and a timing signal are applied to the gate line and the data line of the thin film transistor in order to control the arrangement angle of the liquid crystals of the liquid crystal display panel 212 and when the liquid crystals are arranged. As shown in the figure, a tape carrier package 216 on the data side is attached to the source side of the liquid crystal display panel 212, and a gate side on the gate side for determining the application time of the gate drive signal is provided. The flexible circuit board 218 on the gate side is attached.

An integrated printed circuit board 214 for receiving an image signal from the outside of the liquid crystal display panel 212 and applying a driving signal to the gate line and the data line is connected to the data tape carrier package 214. The integrated printed circuit board 214 receives an image signal generated from an external information processing device (not shown) such as a computer, and applies a gate driving signal, a data signal, and these signals, which are signals for driving the liquid crystal display, at an appropriate time. To generate a plurality of timing signals.

A backlight assembly 220 is provided below the display unit 210 to provide uniform light to the display unit 210. The backlight assembly 220 includes a linear lamp 222 provided on one side of the liquid crystal display module 200 to generate light. The light guide plate 224 has a size corresponding to the liquid crystal panel 212 of the display unit 210 and is positioned below the liquid crystal panel 212 so that the side of the lamp 222 is thicker and thinner as it moves away from the lamp 222. It is formed to guide the light generated by the lamp 222 toward the display unit 210 to change the path of the light.

A plurality of optical sheets 226 are provided on the light guide plate 224 to uniform the luminance of light emitted from the light guide plate 224 and directed toward the liquid crystal display panel 212. In addition, a light reflector 228 is provided under the light guide plate 224 to reflect light leaking from the light guide plate 224 to the light guide plate 224 to increase the light efficiency.

The display unit 210 and the backlight assembly 220 are fixedly supported by the mold frame 230. The mold frame 230 has a box shape of a rectangular parallelepiped and an upper surface thereof is opened. That is, it is composed of four side walls and the bottom surface, the bottom surface is formed with openings for bending the integrated printed circuit board 214 is bent along the outer surface of the mold frame 230.

Chassis 240 to secure the integrated printed circuit board 214 and gate tape carrier package 218 of the display unit 210 to the bottom surface of the mold frame 230 while bending it out of the mold frame 230. ) Is provided.

The chassis 240 has a rectangular parallelepiped shape like the mold frame 230, and an upper surface portion thereof is opened to expose the liquid crystal display panel 210, and a sidewall portion of the chassis 240 is bent in an inner vertical direction so as to form the liquid crystal display panel 210. Cover the upper periphery.

In order to assemble the liquid crystal display, the backlight assembly 220 is first seated on the mold frame 230, and then the display unit 210 is seated on the backlight assembly 220. Next, the integrated printed circuit board 214 connected through the data tape carrier package 216 is bent along the side wall outer surface of the mold frame 230 and seated in an opening formed in the bottom surface of the mold frame 230. . Subsequently, the chassis 240 is coupled to the mold frame 230 so that the display unit 210 and the backlight assembly 220 are fixed to the mold frame 230.

In this case, the gate-side flexible circuit board 218 attached to the gate side of the display unit 210 is fixed to the bottom surface of the mold frame 230 while surrounding the outer surface of the mold frame 230. In order to fix the gate-side flexible circuit board 218 to the mold frame 230 to prevent it from being separated from the mold frame 230, it is necessary to fix the gate side flexible circuit board 218 using an adhesive tape or a separate fixing member.

According to the invention disclosed in the preceding application, a separate prism-shaped fixing member 232 is used for the side wall of the gate side of the mold frame 230. That is, the fixing member 232 is separately coupled to the sidewall portion of the gate side of the mold frame 230 so that the fixing member 232 supports the flexible circuit board 218 on the gate side.

After manufacturing the liquid crystal display module in this manner, the liquid crystal display module is completed by placing the liquid crystal display module in the front case 300 and the rear case 400 having an opening exposing the liquid crystal display panel 210.

In the above-mentioned liquid crystal display device, since the tape carrier package protective cover on the gate side is fixed to the chassis by using an adhesive tape, workability in the assembling process is lowered. In addition, stress is generated in the gate tape carrier package by the protective cover when the chassis is fastened.

Further, the jig is changed at the time of assembly of the mechanism according to the gate tape carrier package protective cover.

Accordingly, it is an object of the present invention to provide a liquid crystal display device having a chassis having a novel structure capable of easily supporting the tape carrier package on the gate side toward the mold frame.

1 is an exploded perspective view illustrating a liquid crystal display device disclosed in a prior application filed by the present applicant.

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

3 is a cross-sectional view illustrating a chassis of a portion corresponding to a portion where a gate side flexible circuit board is formed.

4 is a cross-sectional view illustrating a gate-side flexible circuit board portion after assembling the liquid crystal display shown in FIG. 2 using the chassis shown in FIG. 3.

5 is a cross-sectional view illustrating a state in which a gate-side flexible circuit board is supported toward a mold frame using a support member according to another exemplary embodiment of the present invention.

<Explanation of symbols for main parts of the drawings>

600: liquid crystal display device 700: liquid crystal display module

800: front case 900: back case

710: display unit 712: liquid crystal display panel

714: integrated printed circuit board 716: data side tape carrier package

718: gate side flexible circuit board

712a: thin film transistor substrate 712b: color filter substrate

720: backlight assembly 722: linear lamp

724: Light guide plate 726: optical sheets

728: reflector 730: mold frame

740: chassis 750: printed circuit board cover

760: elastic support member 745: bending piece

In order to achieve the above objects, the present invention provides a liquid crystal display panel, a source portion for providing a data driving signal to a liquid crystal display panel through a data line side of the liquid crystal display panel, and a gate driving signal to a gate line of the liquid crystal display panel. A display unit including an integrated printed circuit board having a gate portion for providing a flexible circuit board, and a flexible circuit board for transmitting the gate driving signal or data driving signal to the liquid crystal panel;

A backlight assembly providing light to the display unit;

A mold frame for accommodating the liquid crystal panel and the backlight assembly;

A chassis for bringing the integrated printed circuit board and the gate side flexible circuit board into close contact with the mold frame; And

And support means for supporting the gate side flexible circuit board toward the mold frame to be provided at a corresponding sidewall portion of the chassis of the gate side flexible circuit board.

According to the present invention, the flexible circuit board can be easily supported toward the mold frame without using the flexible circuit board protective cover, thereby increasing the process efficiency at the time of manufacturing the liquid crystal display module.

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

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

Referring to FIG. 2, the liquid crystal display device 600 is a front case 800 and a rear case 900 for accommodating a liquid crystal display module 700 and a liquid crystal display module 700 for displaying a screen by applying an image signal. It consists of).

The liquid crystal display module 700 includes a display unit 710 including a liquid crystal display panel for displaying a screen.

The display unit 710 includes a liquid crystal display panel 712, an integrated printed circuit board 714, a data side tape carrier package 716, and a gate side flexible circuit board 718 manufactured by a COF method.

The liquid crystal display panel 712 includes a thin film transistor substrate 712a, a color filter substrate 712b, and a liquid crystal (not shown).

The thin film transistor substrate 712a is a transparent glass substrate on which a matrix thin film transistor is formed. A data line is connected to a source terminal of the thin film transistors, and a gate line is connected to a gate terminal. In addition, a pixel electrode made of indium tin oxide (ITO), which is a transparent conductive material, is formed in the drain terminal.

When electrical signals are input to the data lines and the gate lines, electrical signals are input to the source and gate terminals of the respective thin film transistors, and the thin film transistors are turned on or turned off according to the input of the electrical signals, thereby draining the drain terminals. The furnace outputs an electrical signal necessary for pixel formation.

The color filter substrate 712b is provided to face the thin film transistor substrate 712a. The color filter substrate 712b is a substrate in which RGB pixels, which are color pixels in which a predetermined color is expressed while light passes, are formed by a thin film process. The common electrode made of ITO is coated on the front surface of the color filter substrate 712b.

When power is applied to the gate terminal and the source terminal of the transistor of the thin film transistor substrate 712a described above and the thin film transistor is turned on, an electric field is formed between the pixel electrode and the common electrode of the color filter substrate. By such an electric field, the arrangement angle of the liquid crystal injected between the thin film transistor substrate 712 and the color filter substrate 714 is changed, and the light transmittance is changed according to the changed arrangement angle to obtain a desired pixel.

A driving signal and a timing signal are applied to the gate line and the data line of the thin film transistor in order to control the arrangement angle of the liquid crystals and the timing of the liquid crystals of the liquid crystal display panel 712. As shown, a data tape carrier package 716 is attached to the source side of the liquid crystal display panel 712, and a COF method for determining the application timing of the gate drive signal on the gate side. The gate side flexible circuit board 718 manufactured by the above is attached.

The integrated printed circuit board 714 for receiving an image signal from the outside of the liquid crystal display panel 712 and applying a driving signal to the gate line and the data line includes a data tape carrier package on the data line side of the liquid crystal display panel 712. 714). The integrated printed circuit board 714 receives a video signal generated from an external information processing device (not shown) such as a computer and the like to provide a data driving signal to the liquid crystal display panel 712 and the liquid crystal display panel. A gate portion for providing a gate driving signal is formed in the gate line of 712. That is, the integrated printed circuit board 714 generates a gate driving signal, a signal for driving the liquid crystal display, a data signal, and a plurality of timing signals for applying these signals at an appropriate time, so that the gate driving signal is gate-side flexible. The data line is applied to the gate line of the liquid crystal display panel 712 through the circuit board 718, and the data signal is applied to the data line of the liquid crystal display panel 712 through the data tape carry package 716.

A backlight assembly 720 is provided below the display unit 710 to provide uniform light to the display unit 710. The backlight assembly 720 includes a linear lamp 722 provided at one side of the liquid crystal display module 700 to generate light. The light guide plate 724 has a size corresponding to the liquid crystal panel 712 of the display unit 710 and is positioned below the liquid crystal panel 712 so that the lamp 722 side is thicker and the thinner the lamp 722 is. The light generated by the lamp 722 guides the light toward the display unit 710 to change the path of the light.

On the light guide plate 724, a plurality of optical sheets 726 are provided to uniform the luminance of light emitted from the light guide plate 724 and directed toward the liquid crystal display panel 712. In addition, a light reflector 728 is provided under the light guide plate 724 to reflect light leaking from the light guide plate 724 to the light guide plate 724 to increase light efficiency.

The display unit 710 and the backlight assembly 720 are fixedly supported by a mold frame 730 that is a storage container. The mold frame 730 has a box shape of a rectangular parallelepiped, and an upper surface thereof is opened. That is, four sidewalls and a bottom surface are formed, and an opening for bending the integrated printed circuit board 714 along the outer surface of the mold frame 730 is formed on the bottom surface.

The chassis 740 for fixing the integrated printed circuit board 714 and the gate tape carrier package 718 of the display unit 710 to the bottom surface of the mold frame 730 while bending it out of the mold frame 730. ) Is provided.

The bottom of the mold frame 730 is attached to the bottom of the mold frame 730, the bottom portion of the data side to which the integrated printed circuit board 714 is attached and the gate side flexible circuit board 718 is fixed A printed circuit board cover 750 is provided to protect the gate side bottom portion. The printed circuit board cover 750 has an L or L shape. The printed circuit board cover 750 may be easily manufactured with a plastic film or the like.

The chassis 740 has a rectangular parallelepiped shape like the mold frame 730, and an upper surface portion thereof is opened to expose the liquid crystal display panel 710, and a sidewall portion thereof is bent in an inner vertical direction so that Cover the upper periphery.

In order to assemble the liquid crystal display, the backlight assembly 720 is first seated on the mold frame 730, and then the display unit 710 is seated on the backlight assembly 720. Next, the integrated printed circuit board 714 connected through the data tape carrier package 716 is bent along the side wall outer surface of the mold frame 730 to be seated in an opening formed in the bottom surface of the mold frame 730. . Subsequently, the chassis 740 is coupled to the mold frame 730 so that the display unit 710 and the backlight assembly 720 are fixed to the mold frame 730.

In this case, the gate-side flexible circuit board 718 attached to the gate side of the display unit 710 is fixed to the bottom surface of the mold frame 730 while surrounding the outer surface of the mold frame 730.

3 is a cross-sectional view illustrating a chassis 740 of a portion corresponding to a portion where the gate side flexible circuit board 718 is formed. Referring to FIG. 3, the chassis 740 is integrally formed by vertically combining a horizontal portion 740a covering the upper periphery of the liquid crystal panel 710 and a side wall portion 740b surrounding the side wall of the liquid crystal panel 710. Are combined. An elastic support member for supporting the gate tape carrier package 718 on the mold frame 720 may be formed on an inner surface of the side wall portion 740b of the chassis 740 corresponding to the formation portion of the gate-side flexible circuit board 718. 760 is provided.

The elastic support member 760 is preferably made of an elastic material such as rubber. The elastic support member 760 preferably smoothes the surface so as not to damage the gate tape carrier package. The elastic support member 760 has an L-shape as shown, a vertical portion is fixed to an inner surface of the side wall portion 740b of the chassis 740, and a horizontal portion is the gate-side flexible circuit board 718. Support elastically.

An opening 740c is formed in the sidewall portion 740b of the chassis 740 to fix the vertical portion of the elastic support member 760. Correspondingly, an elastic fixing protrusion 760a which is inserted into and fixed to the opening portion 740c is formed in the vertical portion of the elastic supporting member 760.

Instead of the opening 740c and the elastic fixing protrusion 760a, a vertical portion of the support member 760 may be attached and fixed on the inner side surface of the side wall portion 740b of the chassis 740.

4 is a cross-sectional view illustrating a gate-side flexible circuit board portion after assembling the liquid crystal display shown in FIG. 2 using the chassis shown in FIG. 3.

As shown, the backlight assembly 720 is first seated on the mold frame 730, and then the display unit 710 is placed on the backlight assembly 720. An end of the horizontal portion 740a of the chassis 740 lies over the periphery of the display unit 710. On the other hand, the gate-side flexible circuit board 718 attached to the gate side of the display unit 710 is folded to surround the outer surface of the mold frame 730. Grooves 740 are formed in the outer wall of the mold frame 730 to accommodate chips of the gate-side flexible circuit board 718. In the assembled state, the horizontal portion of the supporting member 760 supports the gate side flexible circuit board 718 to be in close contact with the mold frame 730.

In addition, a protective cover surrounding the gate side flexible circuit board 718 between the gate side flexible circuit board 718 and the support member 760 to optionally prevent damage to the gate side flexible circuit board 718. 770 is further provided. The protective cover 770 is primarily fixed to an inner surface portion of the side wall 740b of the chassis 740 at a position higher than the support member 760, and an upper end thereof is horizontally 740a of the chassis 740. It is fixed to extend to the bottom of the. In order to fix the upper end of the protective cover 770 on the bottom surface of the horizontal portion 740a of the chassis 740, a double-sided adhesive tape 620 or an adhesive may be used. An intermediate portion of the protective cover 770 is wrapped to protect the gate side flexible circuit board 718. The lower end of the protective cover 770 extends and is fixed to the gate end of the bottom of the mold frame 730. The double-sided adhesive tape 630 can be used as a fixing member for fixing the lower end of the protective cover 770. An adhesive may also be used as the fixing member.

5 is a cross-sectional view illustrating a state in which a gate tape carrier package is fixed by using a fixing member according to another embodiment of the present invention.

In Fig. 5, the same members as in Fig. 4 are denoted by the same reference numerals. Referring to FIG. 5, the gate-side flexible circuit board 718 is supported by using a bent piece 745 extending from the sidewall portion 740b of the chassis 740 instead of the elastic support member 760 in FIG. 4. do. The bent piece 745 extends from the sidewall portion 740b of the chassis 740 corresponding to the portion where the gate side flexible circuit board 718 is attached. As shown, the bent piece 745 has a horizontal portion 745a that is fixed near the central portion of the sidewall portion 740b of the chassis 740. An inclined portion 745b is extended at the end of the horizontal portion 745a to support the gate-side flexible circuit board 718 while being in elastic contact with the mold frame 730. In addition, the lower end of the inclined portion 745b extends to the bottom surface of the mold frame 730 in the vertical downward direction to support the bent piece 745 while providing elasticity to the inclined portion 745b. ) Is formed. The support 745c is shown to have the shape of a hook, but may have an annular shape instead of the hook shape. As such, even if the shape is different from the hook shape, the shape may be variously modified as long as the other member is not damaged while being in contact with the mold frame 730.

After the liquid crystal display module is manufactured in this manner, the liquid crystal display module is disposed in the front case 800 and the rear case 900 having an opening exposing the liquid crystal display panel 710 to complete the liquid crystal display device.

In the above-described embodiments, the gate-side flexible circuit board manufactured by the gate-side COF method has been described as an example. However, an integrated printed circuit board is embedded in the main body, and the COF-type flexible circuit board is provided on the data side and the gate side. The present invention can also be applied to a liquid crystal display module having only bays attached thereto.

According to the present invention, the fixing member for supporting the gate-side flexible circuit board to the mold frame can be integrally formed with the chassis. Therefore, the final process step for assembling the liquid crystal display module can be made easily.

In addition, a flexible circuit board such as a tape carrier package may be supported toward the side wall portion of the mold frame without using a protective film of the tape carrier package which is a flexible circuit board.

Therefore, the step of assembling the liquid crystal display module can be partially omitted, thereby improving productivity.

As described above, although described with reference to a preferred embodiment of the present invention, those skilled in the art will be variously modified and modified within the scope of the present invention without departing from the spirit and scope of the present invention described in the claims below. It will be appreciated that it can be changed.

Claims (11)

An integrated printed circuit including a liquid crystal display panel, a source portion for providing a data driving signal to a liquid crystal display panel through a data line of the liquid crystal display panel, and a gate portion for providing a gate driving signal to a gate line of the liquid crystal display panel. A display unit attached to the liquid crystal display panel, the display unit including a flexible circuit board for transmitting the data driving signal or the gate driving signal to the liquid crystal display panel; A backlight assembly providing light to the display unit; A mold frame for accommodating the liquid crystal panel and the backlight assembly; A chassis for tightly coupling the integrated printed circuit board and the flexible circuit board to the mold frame; And And support means provided on a side wall portion of the corresponding chassis of the flexible circuit board to support the flexible circuit board toward the mold frame. The liquid crystal display device according to claim 1, wherein the support means is made of an elastic material. The liquid crystal display device according to claim 1, wherein the support means has an L shape and is fixed to an inner wall of the chassis such that a horizontal portion elastically supports the rear surface of the flexible circuit board. The support of the mold frame according to claim 1, wherein one end is fixed to the side wall portion of the chassis at a higher position of the support means between the flexible circuit board and the support means, and surrounds the flexible circuit board. And a flexible circuit board protective cover extending to one end of the bottom portion on the side of the means. The liquid crystal display device according to claim 4, further comprising protective cover fixing means for fixing the other end of the flexible circuit board protective cover on the bottom portion of the storage container. The printed circuit board cover of claim 1, further comprising a printed circuit board cover provided on a bottom surface of the storage container to protect a bottom portion of the side to which the integrated circuit board is attached and a bottom portion of the side to which the flexible circuit board is attached. A liquid crystal display device characterized in that. 2. The support of claim 1, wherein the support means is integrally fixed to the side wall portion of the chassis corresponding to the portion to which the gate side flexible circuit board is attached, and is bent to support the gate side flexible circuit board from the side wall portion of the chassis. It is a bending piece which has become a liquid crystal display device. 8. The liquid crystal display of claim 7, wherein the bent piece includes a horizontal portion fixed to a central portion of the side wall portion of the chassis and an inclined portion for elastically contacting the flexible circuit board at an end of the horizontal portion. Device. The liquid crystal display of claim 8, further comprising a support part formed at an end of the inclined part and extending to the bottom of the mold frame to elastically support the inclined part. The liquid crystal display of claim 9, wherein the support has a hook shape. The liquid crystal display of claim 1, wherein the flexible circuit board is a gate side flexible circuit board attached to a gate side of the liquid crystal panel to transmit a gate driving signal from the integrated printed circuit board to the liquid crystal panel. .