KR20030067376A - Liquid crystal display apparatus - Google Patents

Abstract

PURPOSE: A liquid crystal display is provided to improve the assembly and radiation efficiency of the liquid crystal display by radiating heat generated from a backlight unit through a bottom chassis. CONSTITUTION: A backlight unit(400) generates light. A display unit(300) is arranged on a first surface of the backlight unit and receives light for displaying an image. A first mold piece(510) and a second mold piece(520) contain the display unit and the backlight unit. A bottom chassis(220) contains the display unit and the backlight unit in a state of being contained at the first mold piece and the second mold piece. The bottom chassis is formed of four side surfaces(221,222,223,224) and a bottom surface(225). A top chassis(210) is combined with the bottom chassis for fixing the display unit and the backlight unit at the bottom chassis. The first mold piece and the second mold piece contact with first and second side surfaces(221,222) of the bottom chassis opposite to each other. The first surface of the backlight unit contacts with the bottom surface of the bottom chassis and a second surface opposite to the first surface contacts with the display unit.

Description

Liquid crystal display device {LIQUID CRYSTAL DISPLAY APPARATUS}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of improving assemblability and heat dissipation.

Recently, information processing devices have been rapidly developed to have various forms, various functions, and faster information processing speed. Information having an electrical signal form processed by such an information processing device requires a display device serving as an interface.

Recently, a liquid crystal display device has been developed, which is lighter, smaller, and has full-color, high resolution, and the like, compared to a CRT display device.

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

The liquid crystal display device is classified into a monitor type liquid crystal display device and a notebook type liquid crystal display device.

Notebook-type liquid crystal display devices are being researched and developed in a direction convenient to carry, while the monitor-type liquid crystal display devices are being researched and developed in the direction of enlargement of the screen rather than portability because they are fixed and used in one place.

According to this trend of enlargement, the monitor type liquid crystal display device adopts the following structure.

The monitor-type liquid crystal display device includes a display unit including a liquid crystal display panel for displaying a screen and a backlight unit for providing light to the display unit. In addition, a storage container for housing the display unit and the backlight unit is included.

At this time, the enlargement of the screen of the monitor-type liquid crystal display device is accompanied by an increase in the size of the liquid crystal display panel representing the screen. In addition, as the size of the liquid crystal display panel increases, the size of components of the backlight unit for providing light to the front surface of the liquid crystal display panel increases, and also requires a large amount of light emitted from the backlight unit. do.

Due to the increase in the amount of light, the number of lamps used in the backlight unit increases, and a structure in which lamps provided only on one side of the light guide plate are provided on two or three sides of the light guide plate is adopted.

In addition, as the size of the components of the monitor-type liquid crystal display device increases, many storage containers are required to fix them more firmly.

However, the above-described monitor type liquid crystal display device has the following problems.

First, as the number of lamps increases, the heat generated from the lamps increases. However, although the heat generated from the lamp is increased, the passages through which the heat can be discharged are limited by the receiving containers provided to improve the assemblability.

Therefore, a yellowing phenomenon frequently occurs in which the shape of the component parts is deformed or the sheet and the light guide plate yellow due to heat generated from the lamp.

Second, as the size of the components increases, there is a need for storage vessels for accommodating and firmly fixing the components and coupling structures for coupling the storage vessels. At this time, there is a need for a method for improving the assembly between the storage container and the coupling structure or between the storage container.

Accordingly, it is an object of the present invention to provide a liquid crystal display device capable of improving assembly and heat dissipation.

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

FIG. 2 is a perspective view illustrating in detail the structure of the bottom chassis illustrated in FIG. 1.

3 is a perspective view showing in detail the structure of the mold piece shown in FIG.

4 and 5 are views illustrating a structure in which a mold piece is coupled to the bottom chassis.

6 and 7 illustrate bottom chassis and mold pieces fastened by screws.

8 and 9 are cross-sectional views specifically illustrating a coupling structure of the liquid crystal display shown in FIG. 1.

According to an aspect of the present invention, there is provided a liquid crystal display device comprising: a backlight unit for generating light, a display unit disposed on a first surface of the backlight unit, and configured to display an image by receiving the light; A first storage container in contact with both ends of the unit and a storage space including a side wall surface and a bottom surface for accommodating the backlight unit, coupled to the first storage container at opposite side wall surfaces of the side wall surfaces; And a second accommodating container for accommodating the backlight unit such that a second surface opposite to the first surface directly faces the bottom surface.

Here, the first storage container,

A first mold piece comprising a first seating portion for mounting a first end of both ends of the backlight unit and a first coupling portion for engaging with the second receiving means at a first sidewall surface of the side wall surfaces; And a second mold piece comprising a second seating portion for mounting a second end facing the end and a second coupling portion for engaging with the second receiving means at a second sidewall surface facing the first sidewall surface. .

According to the present invention, the liquid crystal display device includes a bottom chassis coupled to both ends of the first and second mold pieces and the first and second mold pieces facing each other. In this case, both ends of the backlight unit are respectively seated on the first and second mold pieces, and are accommodated in the bottom chassis in a seated state. Therefore, the assembly and heat dissipation of the liquid crystal display device can be improved.

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

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

Referring to FIG. 1, the LCD 600 includes a display unit 300 including a liquid crystal display panel 310 for displaying a screen, and a backlight unit 400 for providing light to the display unit 300. . In addition, the display unit 300 and the backlight unit 400 is a storage container for receiving.

The display unit 300 includes a liquid crystal display panel 310, a panel driving data printed circuit board 320 and a gate printed circuit board 330, a data and gate tape carrier package (hereinafter, TCP: 340, 350).

The liquid crystal display panel 310 is a thin film transistor (hereinafter, referred to as a TFT) substrate 311, a color filter substrate 312, and the TFT substrate 311 and the color filter substrate 312 are injected between them. Liquid crystal (not shown).

The TFT substrate 311 is a transparent glass substrate in which TFTs (not shown) are formed in a matrix form. A data line is connected to a source terminal of the TFTs, 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 an electrical signal is input to the data line and the gate line, an electrical signal is input to the source terminal and the gate terminal of each TFT, and the TFT is turned on or turned off according to the input of these electrical signals to the drain terminal. Electrical signals necessary for pixel formation are output.

The color filter substrate 312 is provided to face the TFT substrate 311. The color filter substrate 312 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. A common electrode made of ITO is coated on the front surface of the color filter substrate 312.

When power is applied to the gate terminal and the source terminal of the transistor of the TFT substrate 311 described above and the TFT is turned on, an electric field is formed between the pixel electrode and the common electrode. By this electric field, the arrangement angle of the liquid crystal injected between the TFT substrate 311 and the color filter substrate 312 is changed, and the light transmittance is changed according to the changed arrangement angle to obtain a desired pixel.

As shown, the data side TCP 340 is attached to the source side of the liquid crystal display panel 310, and the gate side is used to determine the application time of the gate drive signal. TCP 350 is attached.

The data printed circuit board 320 for receiving an image signal from the outside of the liquid crystal display panel 310 and applying a driving signal to the gate line and the data line, respectively, has data on the data line side of the liquid crystal display panel 310. The gate printed circuit board 330 is connected to the gate TCP 340 on the gate line side of the liquid crystal display panel 310.

A backlight unit 400 is provided below the display unit 300 to provide uniform light to the display unit 300. The backlight unit 400 includes first and second lamp units 411 and 412 for generating light, and lamps are mounted in the first and second lamp units 411 and 412, respectively.

The light guide plate 420 has a size corresponding to that of the liquid crystal display panel 310 and is positioned below the liquid crystal display panel 310 to receive light generated from the first and second lamp units 411 and 412. The light path is changed while guiding toward the display panel 310.

A plurality of optical sheets 430 are provided on the light guide plate 420 to uniform the luminance of light emitted from the light guide plate 420 and directed toward the liquid crystal display panel 310. In addition, a reflector 440 is provided below the light guide plate 420 to reflect light leaked from the light guide plate 420 to the light guide plate 420 to increase the light efficiency.

The storage container is primarily accommodated in the first and second mold pieces 510 and 520 and the first and second mold pieces 510 and 520 for accommodating the display unit 300 and the backlight unit 400. The bottom chassis 220 and the bottom chassis 220 for accommodating the display unit 300 and the backlight unit 400 in a closed state to be coupled to each other so that the display unit 300 and the backlight unit 400 are coupled to the bottom chassis 220. It consists of a top chassis 210 for fixing to the bottom chassis 220.

As shown, the first and second mold pieces 510 and 520 are the first and second sidewall surfaces 221 facing each other among the four side walls 221, 222, 223 and 224 of the bottom chassis 220. And 222 in contact with each other.

The bottom chassis 220 includes four sidewall surfaces 221, 222, 223, and 224 and a bottom surface 225. When the first and second mold pieces 510 and 520 are accommodated in the bottom chassis 220, the first and second mold pieces 510 and 520 are in contact with both ends of the backlight unit 400, respectively. The backlight unit 400 is accommodated so as to be stored.

Here, the first surface of the backlight unit 400 is in direct contact with the bottom surface 225 of the bottom chassis 220, the second surface opposite to the first surface is the display unit 300. Contact.

Thereafter, the top chassis 210 is coupled to face the bottom chassis 220 to completely fix the display unit 300 and the backlight unit 400 to the bottom chassis 400.

FIG. 2 is a perspective view illustrating the bottom chassis of FIG. 1 in detail. FIG.

Referring to FIG. 2, the bottom chassis 220 has an accommodation space consisting of four sidewall surfaces 221, 222, 223, and 224 and a bottom surface 225, and the four sidewall surfaces 221, 222, 223, Outwardly extending first and second coupling parts 226 and 227 are formed on the first and second sidewall surfaces 221 and 222 facing each other.

Specifically, the first coupling part 226 is a first coupling extending in parallel with the bottom surface 225 in a direction opposite to the direction in which the bottom surface 225 is formed from an upper end of the first side wall surface 221. And a third sidewall surface 226b extending parallel to the first sidewall surface 221 from the surface 226a and the first coupling surface 226a toward the bottom surface 225.

In addition, the second coupling part 227 is a second coupling surface extending in parallel to the bottom surface 225 in a direction opposite to the direction in which the bottom surface 225 is formed from an upper end of the second side wall surface 222. 227a and a fourth sidewall surface 227b extending in parallel with the second sidewall surface 222 from the second coupling surface 227a toward the bottom surface 225.

3 is a perspective view showing in detail the mold piece shown in FIG.

Referring to FIG. 3, a mold piece consists of first and second mold pieces 510 and 520 formed in the same shape.

The first mold piece 510 may include a first seating surface 511, a first side surface 512 extending in a first direction perpendicular to the first seating surface 511 from the first seating surface 511, and The third coupling part 513 extends in a direction opposite to the direction in which the first seating surface 511 extends from the first side surface 512.

The third coupling part 513 has a third coupling surface extending in parallel with the first mounting surface 511 in a direction opposite to the direction in which the first mounting surface 511 extends from the first side surface 522. 513a and a second side surface 513b extending from the third engagement surface 513a toward the first seating surface 511 in the first direction.

The second mold piece 520 has a second seating surface 521, a third side surface 522 extending in the first direction from the second seating surface 521 and the third side surface 522 from the third side surface 522. 2 The mounting surface 521 is comprised by the 4th coupling part 523 extended in the direction opposite to the direction in which it extended.

The fourth coupling part 523 has a fourth coupling surface extending in parallel with the second mounting surface 521 in a direction opposite to the direction in which the second mounting surface 521 extends from the third side surface 522. And a fourth side surface 523b extending from the fourth coupling surface 523a toward the second mounting surface 521 in the first direction.

4 and 5 are views illustrating a structure in which a mold piece is coupled to the bottom chassis.

4 and 5, the first mold piece 510 is accommodated in the first sidewall surface 221 side of the bottom chassis 220 and the second side facing the first sidewall surface 221. The second mold piece 520 is accommodated in the wall surface 222.

In detail, the first seating surface 511 of the first mold piece 510 is in direct contact with one side of the bottom surface 225, and the first side surface 512 is the first sidewall surface 221. Is in contact with. In addition, the third coupling portion 513 of the first mold piece 510 is engaged while surrounding the first coupling portion 226 of the bottom chassis 220.

The third coupling surface 513a of the third coupling portion 513 is in contact with the first coupling surface 226a of the first coupling portion 226, and the second side surface of the third coupling portion 513 ( 513b is in contact with the third sidewall surface 226b. In this case, the distance d1 between the first side surface 512 and the second side surface 513b is spaced apart from the distance d2 between the first side wall surface 221 and the third side wall surface 226a. The first mold piece 510 is fitted to the bottom chassis 220.

On the other hand, the second seating surface 521 of the second mold piece 520 is in direct contact with the other side facing one side of the bottom surface 225, the third side 522 is the second side wall surface 222 is contacted. In addition, the fourth coupling part 523 of the first mold piece 520 is engaged while surrounding the second coupling part 227 of the bottom chassis 220.

The fourth coupling surface 523a of the fourth coupling portion 523 is in contact with the second coupling surface 227a of the second coupling portion 227, and the fourth side surface of the fourth coupling portion 523 ( 523b is in contact with the fourth sidewall surface 227b. In this case, the distance d1 between the third and fourth side surfaces 521 and 523b is wider than the distance between the second and fourth sidewall surfaces 222 and 227b so that the second mold piece 520 is separated. The bottom chassis 220 is fitted.

Hereinafter, the first and second mold pieces 510 and 520 and the bottom chassis 220 are screwed in order to more securely fix the first and second mold pieces 510 and 520 to the bottom chassis 220. A structure for fastening using 530 will be described with reference to FIGS. 6 and 7.

6 and 7 illustrate bottom chassis and mold pieces fastened by screws. However, the description of the structure in which the first mold piece and the bottom chassis are coupled replaces the description of the second mold piece having the same coupling structure.

6 and 7, a fastening hole 513c penetrating the third coupling surface 513a is formed in the third coupling surface 513a of the first mold piece 510, and the bottom chassis ( A fastening groove 226c is formed at a position corresponding to the fastening hole 513c in the first coupling surface 226 of 220.

When the third coupling part 513 of the first mold piece 510 is engaged by being engaged with the first coupling part 223 of the bottom chassis 220, the third coupling surface 513a and the first coupling surface are coupled to each other. As the 226a contacts, the fastening hole 513c and the fastening groove 226c correspond to each other.

In this case, the screw 530 is coupled to the fastening groove 226c after passing through the fastening hole 513c to couple the first mold piece 510 to the bottom chassis 220.

Here, the position and number of the fastening holes 513c and the fastening grooves 226c are not particularly limited.

6 and 7, the structure in which the first mold piece 510 and the bottom chassis 220 are fastened has been described. However, the structure in which the first mold piece 510 and the bottom chassis 220 are coupled to each other is described. In addition to this structure, various methods may be applied.

That is, although not shown in the drawings, the third engaging surface is provided with a coupling protrusion protruding to a predetermined height toward the first seating surface, and the coupling hole having a degree to which the coupling protrusion is fitted into the first coupling surface. Is formed. Therefore, when the first mold pillar is accommodated in the bottom chassis, the coupling protrusion is fitted into the coupling hole, thereby fixing the first mold piece to the bottom chassis.

8 and 9 are cross-sectional views specifically illustrating a coupling structure of the liquid crystal display shown in FIG. 1.

Referring to FIG. 8, the first and second mold pieces 510 and 520 are received at the first and second sidewall surfaces 221 and 222 of the bottom chassis 220. In this case, the first and second coupling parts 226 and 227 of the bottom chassis 220 are fitted to the third and fourth coupling parts 513 and 523 of the first and second mold pieces 510 and 520, respectively. It is completely combined by losing.

Thereafter, both ends of the backlight unit 400 are seated on the first and second seating surfaces 511 and 521 of the first and second mold pieces 510 and 520 to accommodate the backlight unit 400. . In detail, the reflective plate 440 is mounted on the first and second mounting surfaces 511 and 521, and then the light guide plate 420 and the optical sheets 430 are sequentially mounted.

As shown in FIG. 8, the first surface of the backlight unit 400 is in direct contact with the bottom surface 225 of the bottom chassis 220. In this case, heat generated by the backlight unit 400 is discharged through the bottom chassis 220. Therefore, heat dissipation characteristics of the liquid crystal display device 600 are improved in the coupling structure.

The liquid crystal display panel 310 is mounted on the second surface of the backlight unit 400 facing the first surface. Then, the top chassis 210 for fixing the backlight unit 400 and the liquid crystal display panel 310 to the bottom chassis 220 by being coupled to the bottom chassis 220 on the liquid crystal display panel 310. Is provided.

9, the backlight unit 400 is accommodated in the bottom chassis 220. Specifically, the first and second lamp units 411 and 412 are accommodated in the fifth and sixth sidewall surfaces 223 and 224 of the bottom chassis 400, respectively.

In this case, the first lamp unit 411 covers the first lamp 411a for generating light and the first lamp 411a to direct light generated from the first lamp 411a to the light guide plate 420. And a first lamp cover 411b for reflecting. The second lamp unit 412 covers the second lamp 412a and the second lamp 412a for generating light to reflect the light generated from the second lamp 412a toward the light guide plate 420. It consists of a second lamp cover 412b.

As shown in FIG. 9, when the first and second lamp units 411 and 412 are provided on the fifth and sixth sidewall surfaces 223 and 224 of the bottom chassis 220, respectively, the reflector plate 440 may be provided. The light guide plate 420 and the optical sheets 430 are sequentially seated on the bottom surface 225 of the bottom chassis 220.

Subsequently, when the liquid crystal display panel 310 is seated on an upper surface of the optical sheet 430, the backlight unit 400 and the liquid crystal may be combined to face the bottom chassis 220 on the liquid crystal display panel 310. A top chassis 210 is provided to fix the display panel 310 to the bottom chassis 220.

According to the present invention, the liquid crystal display includes a first chassis and a second chassis, the bottom chassis being coupled to opposite ends of the first and second mold pieces, respectively. In this case, both ends of the backlight unit are respectively seated on the first and second mold pieces, and are accommodated in the bottom chassis in a seated state.

Therefore, the first surface of the backlight unit is in direct contact with the bottom surface of the bottom chassis so that heat generated from the backlight unit may be discharged through the bottom chassis.

In addition, since the first and second mold pieces are respectively joined while covering both ends of the bottom chassis, foreign matter penetrates during assembly, and thus, assembly performance may be improved.

Although described with reference to the examples, those skilled in the art can understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention described in the claims below. There will be.

Claims (5)

A backlight unit for generating light; A display unit disposed on the first surface of the backlight unit and configured to display an image by receiving the light; First accommodating means for contacting both ends of the backlight unit to accommodate the backlight unit; And It has a storage space consisting of a side wall surface and a bottom surface, the second surface coupled to the first receiving means on both side wall surfaces of the side wall facing each other, the opposite surface of the first surface is directly facing the bottom surface And second accommodating means for accommodating the backlight unit. The method of claim 1, wherein the first receiving means, A first mold including a first seating portion for mounting a first end of the both ends of the backlight unit, and a first coupling portion for coupling with the second receiving means on a first sidewall surface of both sidewall surfaces of the second receiving means. peace; And A second mold piece comprising a second seating portion for mounting the second end facing the first end, and a second coupling portion for engaging with the second receiving means at the second sidewall surface facing the first sidewall surface; Liquid crystal display comprising a. 3. The method of claim 2, wherein the first coupling part comprises a first sidewall extending from the first seating part in a first direction perpendicular to the seating part, and a second sidewall parallel to the first seating part from the first sidewall. A third sidewall extending from the first seating surface and a second sidewall extending in the first direction from the first coupling surface, wherein the second coupling portion extends in the first direction from the second seating portion; And a fourth sidewall extending from the third sidewall portion in the first direction and a fourth sidewall extending from the second coupling surface in the second direction. According to claim 3, wherein the second receiving means is made of a third engaging surface extending in the first direction from the first sidewall surface and the third sidewall surface extending in the second direction from the third engaging surface And a fourth engaging portion formed from a third engaging portion and a fourth engaging surface extending in the first direction from the second sidewall surface and a fourth engaging surface extending from the fourth engaging surface in the second direction. Liquid crystal display device. 5. The second mold piece of claim 4, wherein the first mold piece is fitted to the third coupling part, and the second mold piece is fitted to the fourth coupling part by the second coupling part. An LCD is characterized in that the angle is coupled to the receiving means.