KR20080062095A - Display device - Google Patents

Abstract

A display device that can reinforce strength is disclosed. The display device includes a display panel, a backlight unit, a mold frame, and a bottom chassis. The driving chip is mounted on the display panel. The backlight unit supplies light to the display panel. The mold frame houses the backlight unit and the display panel. The bottom chassis is integrally formed with the mold frame, and has a bottom plate covering the bottom of the backlight unit and sidewalls extending from the bottom plate and disposed on an outer surface of the mold frame corresponding to the area where the driving chip is mounted. Therefore, the bottom chassis integrally formed with the mold frame may include sidewalls in regions corresponding to the driving chips, thereby reinforcing the strength of the mold frame.

Description

Display device {DISPLAY DEVICE}

1 is a perspective view illustrating a display device according to an exemplary embodiment of the present invention.

FIG. 2 is a perspective view illustrating a rear surface of the mold frame and the bottom chassis shown in FIG.

3 is a cross-sectional view taken along the line II ′ of FIG. 1.

4 is a cross-sectional view illustrating a mold frame and a bottom chassis of a display device according to another exemplary embodiment of the present invention.

5 is a cross-sectional view illustrating a mold frame and a bottom chassis of a display device according to still another embodiment of the present invention.

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

100: display device 200: display panel

210: first substrate 220: second substrate

222: substrate extension 300: driving chip

400 mold frame 410 panel support

420: second opening 430: mold extension

500: bottom chassis 510: bottom plate

512: first opening 520: first sidewall

600: panel drive film 610: drive element

700: backlight unit

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display device, and more particularly, to a display device capable of reinforcing strength.

In general, the liquid crystal display device is thin and light, and has advantages of low driving voltage and low power consumption. In particular, liquid crystal displays are widely used in portable electronic devices such as mobile communication terminals for this reason.

The liquid crystal display includes a liquid crystal display panel for displaying an image and a backlight unit for supplying light to the liquid crystal display panel. The liquid crystal display panel includes a TFT substrate in which thin film transistors (hereinafter, TFTs) are arranged in a matrix form, and a color filter substrate in which a color filter is formed in a thin film form. Here, the TFT substrate and the color filter substrate are made of a glass material which is transparent but is highly likely to be damaged by external impact. In addition, the TFT substrate has a substrate extension portion extending from the color filter substrate at one side in order to mount a driving chip for driving the liquid crystal display panel. That is, the color filter substrate is not formed in the substrate extension portion. In addition, a driving chip is mounted on the substrate extension.

On the other hand, the liquid crystal display further includes a mold frame for guiding the edges of the liquid crystal display panel and the backlight unit and a bottom chassis integrally formed with the mold frame. Here, the bottom chassis is made of a metal material to apply the overall strength of the liquid crystal display device.

However, the conventional bottom chassis has a problem in that a separate structure is not formed for the substrate extension portion on which the color filter substrate is not formed, and thus the TFT substrate may be damaged at the substrate extension portion.

Accordingly, the present invention has been made in view of the above problems, and the present invention provides a display device capable of reinforcing bending strength and bending strength in a region corresponding to the driving chip by forming a structure corresponding to the driving chip in the bottom chassis. do.

The display device according to an aspect of the present invention described above includes a display panel, a backlight unit, a mold frame, and a bottom chassis. A driving chip is mounted on the display panel. The backlight unit supplies light to the display panel. The mold frame accommodates the backlight unit and the display panel. The bottom chassis is integrally formed with the mold frame, and is disposed on an outer surface of the mold frame that extends from the bottom plate covering the lower portion of the backlight unit and the bottom plate to correspond to an area in which the driving chip is mounted. Has 1 sidewall.

The first side wall is characterized in that formed long along the outer surface of the mold frame. In addition, the first side wall may be characterized in that the upper end is bent between the mold frame.

The bottom chassis may further include second and third sidewalls connected to both ends of the first sidewall, and a fourth sidewall connected to the second and third sidewalls so as to face the first sidewall.

The display device further includes a panel driving film electrically connected to the display panel and extending to a rear surface of the bottom plate, and having a driving element disposed on a surface facing the bottom plate.

Thus, the bottom chassis may include a first opening formed in the bottom plate such that the driving element is disposed, and the mold frame may include a second opening formed to correspond to the first opening. In addition, the mold frame may include a groove surrounding an outer portion of the bottom chassis adjacent to the first opening. On the other hand, the mold frame is characterized in that the injection molded in the bottom chassis.

According to such a display device, the bottom chassis formed integrally with the mold frame forms the first sidewall with the bottom plate in response to the driving chip of the display panel, thereby reinforcing the bending strength and the bending strength in the substrate extension to prevent external impact. It can suppress that a 2nd board | substrate is damaged by this.

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

1 is a perspective view illustrating a display device according to an exemplary embodiment of the present invention, and FIG. 2 is a perspective view illustrating a rear surface of the mold frame and the bottom chassis shown in FIG. 1, and FIG. 3 is a line II ′ of FIG. 1. Sectional view cut along the line.

1, 2, and 3, the display device 100 according to an exemplary embodiment of the present invention may include the display panel 200, the driving chip 300, the mold frame 400, and the bottom chassis 500. Include.

The display panel 200 displays an image. The display panel 200 includes a first substrate 210 and a second substrate 220 facing the first substrate 210. The first substrate 210 is a TFT substrate in which thin film transistors (hereinafter, TFTs), which are switching elements, are formed in a matrix form. The second substrate 220 is a color filter substrate in which RGB pixels for implementing colors are formed in a thin film form. The first substrate 210 and the second substrate 220 as described above are made of a transparent glass material. The first substrate 210 and the second substrate 220 may have a thickness of about 0.2 mm to about 0.6 mm, preferably about 0.4 mm. Since such a thickness is generally recognized as very thin, the first substrate 210 and the second substrate 220 may be easily damaged by external impact.

In the display panel 200, the liquid crystal layer 230 is disposed between the first substrate 210 and the second substrate 220. That is, the display panel 200 displays an image using light. The light may be external light applied from the outside or may be internal light supplied from the backlight unit 700 to be disposed on one surface of the display panel 200. In contrast, the display panel 200 may have an organic light emitting layer that generates light between itself between the first substrate 210 and the second substrate 220.

The second substrate 220 includes a substrate extension 222 having one side extending longer than the first substrate 210. That is, the first substrate 210 is not formed in the substrate extension part 222, and only the second substrate 220 is formed. In other words, the substrate extension part 222 may be composed of one substrate and more vulnerable to bending or bending due to an external force than the other portion. An image is not displayed in the substrate extension 222.

The driving chip 300 is disposed in the substrate extension 222. The driving chip 300 applies a control signal to the display panel 200 through a driving signal applied from the outside. Here, the driving signal is applied from the panel driving film 600 to be connected to the end of the substrate extension 222.

As such, the substrate extension 222 may be an area required for electrically connecting the panel driving film 600 while disposing the driving chip 300.

The mold frame 400 has a rectangular ring shape and supports the display panel 200 while being accommodated therein. That is, a panel support part 410 supporting the display panel 200 is formed inside the mold frame 400. The panel support part 410 may be formed on all four sides of the mold frame 400. Alternatively, the panel support 410 may be formed on two opposite surfaces.

Here, the panel support 410 at a position corresponding to the substrate extension 222 has a large area to support the entire area of the substrate extension 222. This is because, as mentioned above, the image is not substantially displayed in the substrate extension 222.

The mold frame 400 is made of a material having excellent workability. This is because the shape of the mold frame 400 may be relatively complicated. For example, the mold frame 400 may be made of a resin material. Since the mold frame 400 may have a relatively weak strength problem, the mold frame 400 may be combined with the bottom chassis 500 to reinforce the strength thereof.

The bottom chassis 500 is integrally formed with the mold frame 400. The bottom chassis 500 is made of a metal material. For example, the bottom chassis 500 is made of stainless material. That is, the bottom chassis 500 serves to apply the overall strength of the display device 100. On the other hand, the bottom chassis 500 uses a thickness of about 0.1 mm to about 0.2 mm as the display device 100 has recently become slimmer. In this case, the bottom chassis 500 may have a thickness of about 0.15 mm. The bottom chassis 500 has a relatively high specific gravity than the mold frame 400.

On the contrary, the bottom chassis 500 may be made of aluminum for light weight, which is a recent trend. However, even at this time, the bottom chassis 500 may have a relatively higher specific gravity than the mold frame 400. As a result, the bottom chassis 500 preferably has a minimum area for weight reduction, if the display device 100 can apply strength that can be stabilized against external impact.

The bottom chassis 500 includes a bottom plate 510 and a first sidewall 520 extending from the bottom plate 510 to a mold frame 400 corresponding to the substrate extension 222. This is to reinforce the strength in the substrate extension 222, which is relatively weaker than in other locations. Here, the strength may mean bending strength or bending strength.

The bottom plate 510 has a plate shape plated. The bottom plate 510 may be opened at the center for weight reduction. The bottom plate 510 is coupled to the bottom surface of the mold frame 400. The first sidewall 520 extends in the vertical direction from the bottom plate 510 and is coupled to an outer surface of the mold frame 400 corresponding to the substrate extension 222. That is, the first sidewall 520 and the bottom plate 510 have an "L" shape.

The first sidewall 520 is elongated along the outer surface of the mold frame 400. Unlike this, a plurality of first sidewalls 520 may be formed at regular intervals. In addition, the first sidewall 520 may extend from the outer surface to the upper surface of the mold frame 400. In addition, the first sidewall 520 may extend from an upper surface to an inner surface of the mold frame 400.

The bottom chassis 500 further includes second, third and fourth sidewalls 530, 540, and 550. The second and third sidewalls 530 and 540 extend from the bottom plate 510 in a vertical direction and are connected to both ends of the first sidewall 520. The fourth sidewall 550 extends in the vertical direction from the bottom plate 510 and is connected to the second and third sidewalls 530 and 540 to face the first sidewall 520. Accordingly, the bottom chassis 500 may have a structure surrounding the bottom surface and the outside surface of the mold frame 400 as a whole.

Accordingly, the bottom chassis 500 may surround the mold frame 400 having a weak structural strength to reinforce the strength of the mold frame 400 to prevent the display panel 200 from being bent or bent due to external force. can do. In particular, since the second substrate 220 is relatively present among the display panels 200, the first sidewall 520 is additionally formed with respect to the substrate extension 222 having a weak strength and having the driving chip 300 mounted thereon. By doing so, the bending strength and the bending strength in the substrate extension part 222 can be reinforced.

The bottom chassis 500 is manufactured using a mold. The mold frame 400 may be manufactured according to an injection molding method based on the bottom chassis 500. Briefly, first, the bottom chassis 500 is manufactured to form the bottom plate 510 and the first, second, third and fourth sidewalls 520, 530, 540, and 550 by using a mold. . Subsequently, the bottom chassis 500 is disposed in a mold formed in the shape of the mold frame 400. Then, the resin liquid is injected into the mold. In this case, it is necessary to apply a separate adhesive material to the bottom chassis 500 to improve affinity with the resin liquid. Finally, when the resin liquid solidifies after a certain time, the mold frame is removed to complete the combination of the mold frame 400 and the bottom chassis 500.

The mold frame 400 manufactured in this manner may completely remove a predetermined gap that may occur when the mold frame 400 is separately manufactured and coupled to the bottom chassis 500. That is, in the recent slimming trend of the display device 100, it may contribute to reducing the thickness thereof.

The display device 100 further includes a panel driving film 600 electrically connected to the substrate extension 222 and extending to the bottom surface of the bottom plate 510. The panel driving film 600 is electrically connected to an external control unit (not shown) and serves to apply a driving signal to the driving chip 300. In this case, a plurality of driving element parts 610 are disposed in the panel driving film 600 in order to stabilize the driving signal and prevent malfunction thereof. In detail, the driving element 610 is disposed on a surface facing the bottom plate 510 in correspondence with the substrate extension 222.

Accordingly, the bottom chassis 500 includes a first opening 512 formed so that the driving element 610 is disposed on the bottom plate 510. In addition, the mold frame 400 includes a second opening 420 formed to correspond to the first opening 512. The second opening 420 is formed in the panel support 410 corresponding to the position of the substrate extension 222 of the mold frame 400.

Here, the mold frame 400 includes a mold extension 430 extending inwardly of the first opening 512 from an edge of the second opening 420 to facilitate fastening with the first opening 512. . The mold extension part 430 may also serve to guide the fastening position of the mold frame 400 and the bottom chassis 500. In this case, the second opening 420 may be formed to be smaller than the first opening 512. Alternatively, the second opening 420 may have the same size as the first opening 512 except for a portion where the mold extension 430 is formed.

As a result, the display device 100 arranges the driving element 610 of the panel driving film 600 at a position corresponding to the substrate extension 222 with a margin, thereby reducing the overall thickness of the display device 100. Can be reduced. In addition, the fastening force of the mold frame 400 and the bottom chassis 500 in the substrate extension 222 may be improved to further reinforce the strength by the first sidewall 520.

The display device 100 may further include a backlight unit 700 disposed between the display panel 200 and the bottom plate 510 of the bottom chassis 500 to supply internal light to the display panel 200. have. The backlight unit 700 is disposed between a light emitting diode (LED) 710 for generating light, a light guide plate 720 disposed at a side of the light emitting diode 710, a light guide plate 720, and a bottom plate 510. The reflective sheet 730 and the optical sheet 740 disposed between the light guide plate 720 and the display panel 200 may be included.

4 is a cross-sectional view illustrating a mold frame and a bottom chassis of a display device according to another exemplary embodiment of the present invention.

4, an end of the first sidewall 580 of the bottom chassis 560 of the display device 110 according to another exemplary embodiment of the present invention is bent between the mold frame 400 and the mold side 400.

The first sidewall 580 includes a reference wall 582 extending from the bottom plate 560 and a bent wall 584 bent from the reference wall 582. The reference wall 582 and the bending wall 584 may be formed using a machine tool such as a separate bending machine or a press.

The bent wall 584 is preferably bent at about 180 degrees. In other words, the reference wall 582 and the bent wall 584 are preferably parallel to each other. This is to prevent the size of the bottom chassis 560 from becoming larger by bending the first sidewall 580. That is, to prevent the display device 110 from growing due to the bottom chassis 560.

Accordingly, the bottom chassis 560 is formed by bending the bent wall 584 in addition to the reference wall 582 with the first side wall 580 extending from the bottom plate 570, thereby increasing the strength of the mold frame 400. It can be further reinforced. In this case, the bent wall 584 preferably extends to the lower end of the reference wall 582. This is to maximize the strength of the first sidewall 580 with the bottom plate 570.

5 is a cross-sectional view illustrating a mold frame and a bottom chassis of a display device according to still another embodiment of the present invention.

Referring to FIG. 5, the mold frame 450 of the display device 120 according to another exemplary embodiment includes a groove 455 surrounding an outer portion of the bottom chassis 500 adjacent to the first opening 512. do.

That is, the mold frame 450 includes a first mold extension 470 and a second mold extension 480. The first mold extension 470 extends inwardly of the first opening 512 from an edge of the second opening 460 of the mold frame 450. The second mold extension 480 extends outward from the end of the first mold extension 470 of the mold frame 450 to the outside of the first opening 512. The first and second mold extensions 470 and 480 may be formed by changing a mold for manufacturing the mold frame 450.

This structure has a structure in which the first and second mold extensions 470 and 480 of the mold frame 450 surround the first opening 512 formed in the bottom plate 510 of the bottom chassis 500. In other words, the mold frame 450 has a groove formed therebetween by the first and second mold extensions 470 and 480, and the groove has an edge of the first opening 512 of the bottom chassis 500. Is fixed to insert.

As a result, the clamping force between the mold frame 450 and the bottom chassis 500 is further improved to remove the shaking between the bottom chassis 500 and the mold frame 450, thereby reducing the bottom plate 510 of the bottom chassis 500. The strength of the display device 120 by the first sidewall 520 can be reinforced more reliably.

According to such a display device, the bottom chassis formed integrally with the mold frame forms sidewalls with the bottom plate corresponding to the driving chips of the display panel, thereby reinforcing the bending strength and the bending strength in the area corresponding to the driving chips, thereby externally It is possible to prevent the second substrate, that is, the display panel, formed solely from the extended portion of the substrate from being damaged by the impact.

Although the detailed description of the present invention has been described with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art will have the idea of the present invention described in the claims to be described later. It will be understood that various modifications and variations can be made in the present invention without departing from the scope of the present invention.

Claims (8)

A display panel on which a driving chip is mounted; A backlight unit supplying light to the display panel; A mold frame accommodating the backlight unit and the display panel; And A first sidewall formed integrally with the mold frame and having a bottom plate covering a lower portion of the backlight unit and a first sidewall extending from the bottom plate and disposed on an outer surface of the mold frame corresponding to a region in which the driving chip is mounted; Display device including a bottom chassis. The display device of claim 1, wherein the first sidewall extends along an outer surface of the mold frame. The display device of claim 2, wherein an upper end of the first sidewall is bent between the mold frame and the mold frame. 3. The bottom chassis of claim 2 wherein the bottom chassis Second and third sidewalls connected to both ends of the first sidewall; And And a fourth sidewall connected to the second and third sidewalls so as to face the first sidewall. The method of claim 4, wherein And a panel driving film electrically connected to the display panel and extending to a rear surface of the bottom plate and having a driving element disposed on a surface facing the bottom plate. 6. The bottom chassis of claim 5, wherein the bottom chassis includes a first opening formed in the bottom plate such that the driving element is disposed, and the mold frame includes a second opening formed to correspond to the first opening. Display device. The display device of claim 6, wherein the mold frame includes a groove surrounding an outer portion of the bottom chassis adjacent to the first opening. The display device of claim 1, wherein the mold frame is injection molded to the bottom chassis.

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