KR20060012827A - Display apparatus - Google Patents

Abstract

A display device is disclosed. The display device includes a storage container, a display panel assembly, a top chassis, and a conductive adhesive member. The storage container houses a backlight assembly that generates light and includes a bottom surface having an inclined surface that is centrally open and inclined from the opening. The display panel assembly includes a display panel which is accommodated in a storage container and applies a driving signal to the display panel for converting light into image light and is disposed on a rear surface of the storage container. The top chassis includes a first surface pressing an edge of the display panel and a second surface coupled to the storage container and extending from the first surface, and the conductive adhesive member passes through the top chassis and the printing via the inclined surface formed on the storage container. The circuit board is electrically connected and grounded. As such, the display quality of the image of the display device may be improved by grounding the printed circuit board through the conductive adhesive member.

Description

Display device {DISPLAY APPARATUS}

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

FIG. 2 is a cross-sectional view taken along line I1-I2 of FIG. 1.

3 is a cross-sectional view illustrating a display device according to a second exemplary embodiment of the present invention.

4 is a cross-sectional view taken along the line II1-II2 of FIG. 3.

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

100: display device 200: storage container

210: bottom surface 214: inclined surface

300: display panel assembly 310: display panel

320: printed circuit board 330: tape carrier package

400: top chassis 500: conductive adhesive member

600: backlight assembly 700: cover of the printed circuit board

The present invention relates to a display device. More specifically, the present invention relates to a display device in which a printed circuit board and a top chassis are grounded more easily.                         

In general, various electronic devices such as mobile communication terminals, digital cameras, notebook computers, and monitors include an image display device for displaying an image. There are various types of image display devices, such as cathode-ray tubes, liquid crystal displays, plasma display panels, field emission displays, and electrical devices. There is a light emitting display (Electro Luminescence).

Among these, a liquid crystal display is one of flat panel displays that display an image using liquid crystals. The liquid crystal display device is thinner and lighter than other display devices, and has advantages of low power consumption and low driving voltage.

BACKGROUND ART Conventional liquid crystal displays have a display panel for displaying an image using light, a back-light assembly for providing light to the display panel, and printing for providing a driving signal for realizing an image from the display panel. The printed circuit board includes a top chassis for fixing a printed circuit board and a display panel.

The printed circuit board applies a stable driving signal to the display panel and is grounded with the top chassis to reduce electromagnetic interference (EMI).

Conventional liquid crystal display devices are electrically connected to the printed circuit board and the top chassis by using a ground clip and a fastening screw by the operator to ground the printed circuit board. However, when the printed circuit board and the top case are grounded by the ground clip and the fastening screw, the clamping force of the fastening screw is weakened, and a space may be generated between the ground plane of the ground clip and the printed circuit board. And top strabismus has a problem that can not be grounded.

In addition, the grounding method by the fastening screw and the ground clip has a problem that the time required for assembly is increased by screwing.

Accordingly, the present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide a display device having an improved display quality of an image by more easily improving the traction with a printed circuit board and a top chassis.

The display device for achieving the object of the present invention includes a storage container, a display panel assembly, a top chassis and a conductive adhesive member. The storage container accommodates a backlight assembly for generating light, and includes a bottom surface having an inclined surface which is opened in the center and inclined at a predetermined angle from the opening. The display panel assembly includes a display panel which is accommodated in a storage container and converts light into image light including information, and a printed circuit board that applies a driving signal to the display panel and is disposed on a rear surface of the storage container. The top chassis includes a first surface pressing an edge of the display panel and a second surface coupled to the storage container and extending from the first surface. The conductive adhesive member electrically connects the top chassis and the printed circuit board to ground through the inclined surface formed on the storage container.

According to the present invention, the top chassis and the printed circuit board are electrically connected by a conductive adhesive member to plate the top chassis and the printed circuit board to suppress the distortion of the driving signal and the interference of the electromagnetic signal, thereby improving the display quality of the image of the display device. It can improve more.

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

Example 1

1 is an exploded perspective view illustrating a display device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line I1-I2 of FIG. 1.

1 and 2, the display device 100 includes a storage container 200, a display panel assembly 300, a top chassis 400, and a conductive adhesive member 500.

The storage container 200 includes a bottom surface 210 having an opening and sidewalls 220 extending or disposed from an edge of the bottom surface.

An inclined surface 214 that is inclined at an angle toward the opening from the edge 212 is formed at the edge 212 of the bottom surface 210 of the storage container 200. In addition, each sidewall 220 of the storage container 200 according to the present embodiment is formed with a step 222 for accommodating the backlight assembly 600 to be described later.

The storage container 200 may include a backlight assembly 600, and the backlight assembly 600 may include a lamp assembly 610, a light guide plate 620, a reflector plate 630, and an optical member 640.

The lamp assembly 610 includes a light source cover that surrounds a part of the light source 612 to reflect light generated from the light source 612 for generating light and the light generated from the light source 612 toward the light guide plate 620 to be described later. (Lamp Cover) 614.

The light guide plate 620 is coupled to the light source cover 614 of the lamp assembly 610 to change the optical distribution of the light incident to the light guide plate 620 and the direction of the light. The reflective plate 630 is interposed between the light guide plate 620 and the bottom surface 210 of the storage container 200 to reflect the light leaked from the light guide plate 620 back to the light guide plate 620.

The optical member 640 diffuses the light emitted from the light guide plate 620 to diffuse the sheet 642 to change the distribution of light and at least one prism sheet 644 to focus the diffused light to improve the front viewing angle and brightness of the light It includes.

The display panel assembly 300 includes a display panel 310 and a printed circuit board 320.

The display panel 310 is accommodated in the storage container 200 and changes the light passing through the optical member 640 into image light including information. In detail, the display panel 310 is coupled to and fixed to the step 222 formed on the sidewall 220 of the storage container 200.

The display panel 310 includes a thin film transistor substrate (TFT substrate) 312, a color filter plate 314, and a liquid crystal layer 316.

The TFT substrate 312 includes a plurality of pixel electrodes, a thin film transistor TFT applying a driving voltage to the pixel electrode, and signal lines for operating the thin film transistor TFT.

The pixel electrode may be, for example, a transparent and conductive indium tin oxide (ITO), indium zinc oxide (IZO), amorphous indium tin oxide (a-ITO) material, or the like. It may include.

The color filter substrate 314 is disposed to face the TFT substrate 312. The color filter substrate 314 is disposed on a surface facing the pixel electrode and is a transparent and conductive common electrode and a color filter disposed opposite the pixel electrode, for example, a red color filter, a green color filter, and a blue color. It includes a color filter.

The liquid crystal layer 316 is interposed between the TFT substrate 312 and the color filter substrate 314, and is rearranged by an electric field difference formed between the pixel electrode and the common electrode. The rearranged liquid crystal layer 316 adjusts the light transmittance of the light generated by the light source 612 of the backlight assembly 600, and the light whose light transmittance is adjusted passes through the color filter to display an image.

The printed circuit board 320 applies a driving signal to the display panel 310 and is disposed on the rear side of the storage container.

The printed circuit board 320 is made of a face-up printed circuit board and a face-down printed circuit board. In the face-up printed circuit board, the surface on which the electronic components are mounted is disposed toward the storage container 200, and in the face-down printed circuit board, the surface on which the electronic components are mounted is disposed toward the opposite side of the storage container 200. do. The printed circuit board 320 according to the present embodiment preferably adopts a face-down method, but a face-up printed circuit board may be used differently.

The printed circuit board 320 includes a first substrate surface 322 and a second substrate surface 324.

On the first substrate surface 322, a driving module 322a for generating a driving signal and a ground pattern 322b electrically connected to the driving module 322a are mounted.

The second substrate surface 324 faces the first substrate surface 322 and is disposed to face the storage container 200. In the present exemplary embodiment, the second substrate surface 324 is disposed to face the reflecting plate 630 through the bottom surface 210 on which the opening of the storage container 200 is formed.

The display panel assembly 300 according to the present exemplary embodiment may further include a tape carrier package 330.

The tape carrier package 330 includes a gate tape carrier package 332 connected to the gate line of the TFT substrate 312 and a source tape carrier package 334 connected to the data line of the TFT substrate 312. The source tape carrier package 334 transfers a driving signal from the printed circuit board 320 to the TFT substrate 312 of the display panel 310.

Top chassis 400 includes a conductive material, for example, metal, and includes a first side 410 and a second side 420. The first surface 410 has a rectangular frame shape having a rectangular opening therein, the second surface 420 extends in a direction parallel to the side wall 220 of the storage container 200 from the first surface 410, For this reason, the top chassis 400 has a cross-sectional shape of "L".

The first surface 410 of the top chassis 400 is fixed by pressing the edge of the display panel 310 so that the display panel 310 is not separated from the storage container 200, and the second surface 410 is the top chassis (410). 400 may be coupled to the receiving container (200).

The conductive adhesive member 500 electrically connects the top chassis 400 and the printed circuit board 320 to ground. The conductive adhesive member 500 according to the present embodiment is a conductive adhesive tape containing a metal, for example, aluminum (Al).

In the present embodiment, the first end 510 of the conductive adhesive member 500 is electrically attached to, for example, the second surface 420 of the top chassis 400, and is formed of the conductive adhesive member 500. The second end 520 opposite to the first end 510 is electrically connected to the printed circuit board 320, for example, the ground pattern 322b.

In this embodiment, the conductive adhesive member 500 is adhered to the top chassis 400 and the printed circuit board 320 via the inclined surface 214 formed on the outer surface of the bottom surface 210 of the storage container 200. As a result, the conductive adhesive member 500 can be prevented from being lifted up from the printed circuit board.

Example  2

3 is a cross-sectional view illustrating a display device according to a second exemplary embodiment of the present invention. 4 is a cross-sectional view taken along the line II1-II2 of FIG. 3. Except for the cover of the printed circuit board, the display device according to the second embodiment of the present invention has the same configuration as the display device of the first embodiment described above, so that duplicate description thereof will be omitted and the same components will be omitted. The same reference numerals and names are used.

3 and 4, the display device 100 according to the present exemplary embodiment further includes a printed circuit board cover 700.

The printed circuit board cover 700 is disposed above the printed circuit board 320 to protect the driving module 322a and the ground pattern 322b from the outside, and serves to block electromagnetic waves.

Each corner of the printed circuit board cover 700 according to the present embodiment includes a cover support 710 disposed to secure a space required for accommodating the printed circuit board 320. A first coupling hole 712 is formed in each cover support 710, and a second coupling hole 322c coupled to the first coupling hole 712 is formed in the printed circuit board 320. The printed circuit board cover 700 is coupled to the printed circuit board 320 by a fastening screw 720. Alternatively, the printed circuit board cover 700 of the present embodiment may include an adhesive insulating member that is bonded to the printed circuit board 320 to protect the printed circuit board 320.

In the printed circuit board cover 700 according to the present exemplary embodiment, a portion overlapping with the conductive adhesive member 500 may be cut. As a result, after the printed circuit board cover 700 is coupled to the printed circuit board 320, the top chassis 400 and the printed circuit board 320 may be electrically grounded by the conductive adhesive member 500.

As described in detail above, by electrically connecting the top chassis and the printed circuit board using a conductive adhesive member and grounding the printed circuit board to the top chassis, a stable driving signal is applied to the display panel to improve the display quality of the image of the display device. Can be improved.

In addition, by inclining the open bottom surface of the storage container, the conductive adhesive member attached to the printed circuit board can be prevented from being lifted, thereby improving the display quality of the image of the display device, and by cutting off a part of the printed circuit board cover. It is possible to easily attach the conductive adhesive member on the printed circuit board, thereby improving the productivity of the display device.

In the detailed description of the present invention described above with reference to the preferred embodiments of the present invention, those skilled in the art or those skilled in the art having ordinary skill in the art will be 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 (6)

A storage container accommodating a backlight assembly for generating light, the storage container including a bottom surface having an inclined surface having an opening in the center thereof and inclined at a predetermined angle from the opening; A display panel assembly accommodated in the storage container and including a display panel for changing the light into image light including information, and a printed circuit board configured to apply a driving signal to the display panel and to be disposed on a rear surface of the storage container; A first top surface presses an edge of the display panel and a second surface extending from the first surface is coupled to the storage container; And And a conductive adhesive member electrically connected to the top chassis and the printed circuit board to ground through the inclined surface formed in the storage container. The printed circuit board of claim 1, wherein the printed circuit board includes a first substrate surface on which a driving module is mounted, a second substrate surface facing the first substrate surface, and the second substrate surface is disposed to face the storage container. Display device characterized in that the. The display device of claim 1, wherein the conductive adhesive member is a conductive adhesive tape containing a metal. The display device of claim 1, wherein a first end of the conductive adhesive member is electrically connected to the second surface, and a second end opposite to the first end is electrically connected to the printed circuit board. . The display device of claim 1, wherein a printed circuit board cover is disposed on the printed circuit board. The display device of claim 5, wherein a portion of the printed circuit board cover overlapping the conductive adhesive member is cut to form an opening.

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