KR20080055068A - Display apparatus - Google Patents

Abstract

A display device is provided to install a conductive wiring portion for discharge pass in the lower area of a display panel to enable static electricity applied to the display panel to be flowed or discharged, thereby preventing devices and driving chips connected to the devices in the display panel from the static electricity. A display device comprises a display panel(100), a contact portion(230), a conductive wiring portion for discharge path(600), a back light assembly, and a containing member(500). The display panel displays an image. The contact portion is installed in the outside of the display panel. The conductive wiring portion for discharge path is installed in at least one of the lower area and side area of the display panel and is connected to the contact portion. The back light assembly provides light to the display panel. The containing member contains the display panel.

Description

Display device {DISPLAY APPARATUS}

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

2 is an exploded perspective view of a display device according to an exemplary embodiment.

3 is a cross-sectional conceptual view of a display device after coupling according to an exemplary embodiment.

4 is a plan view of a display device according to a modification of the exemplary embodiment.

5 and 6 are exploded perspective views of a display device according to a modification of the exemplary embodiment.

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

100: display panel 200: printed circuit board

210: driving chip unit 220: control unit

230: ground portion 300: optical sheet

400: backlight unit 500: storage member

600: conductive wiring portion

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 preventing a screen display failure of a display device by an electro static discharge (ESD).

The display device includes a display panel displaying a screen and a control unit for driving the display panel. Among such display devices, a liquid crystal display using liquid crystal may further include a backlight unit configured to apply light to the display panel.

In the case of such a display panel, a predetermined device is manufactured on a light-transmissive insulating substrate, and driving chips for mounting the display panel on the insulating substrate are mounted, so that the devices and the driving chip have a property of being susceptible to static electricity. That is, the static electricity applied to the display panel is induced to the element or the driving chip through the wiring formed on the insulating substrate to damage them. In particular, recently, devices and driving chips are designed such that the devices and the driving chips of the display panel are driven at a lower voltage. As a result, recent devices have a problem that damage occurs temporarily or permanently even with a small amount of charge, causing display defects.

Accordingly, the present invention is derived to solve the above problems, and by forming a discharge path using a conductive tape in the backlight unit area to discharge the static electricity generated in the upper display panel to the outside to prevent damage caused by static electricity It is an object to provide a device.

For discharge paths provided in a display panel for displaying an image according to the present invention, a ground portion provided outside the display panel, and at least one of a lower region and a side region of the display panel and connected to the ground portion. A display device including a conductive wiring portion is provided.

The display device may further include a backlight assembly configured to provide light to the display panel, and the conductive wiring part for the discharge path may be provided in an area between the backlight assembly and the display panel.

The display panel may further include a backlight assembly that provides light to the display panel and includes an optical sheet and a backlight unit, and the conductive wiring part for the discharge path may be provided in an upper region of the optical sheet or an upper region of the backlight unit.

It is possible to further include an accommodating member for accommodating the display panel, and the conductive wiring part for the discharge path may be provided on the sidewall surface or the bottom surface of the accommodating member.

The display panel may include a display area and a peripheral area, and the conductive wiring part for the discharge path may be provided on at least a portion below the peripheral area of the display panel.

It is preferable to use a conductive tape as the conductive wiring portion for the discharge path. At this time, it is effective that the conductive tape has adhesive properties.

The display device may further include a printed circuit board electrically connected to the display panel, and the ground portion may be provided on the printed circuit board.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention in more detail. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various forms, and only the embodiments are intended to complete the disclosure of the present invention, and to those skilled in the art to fully understand the scope of the invention. It is provided to inform you.

In the drawings, the thickness of layers, films, panels, regions, etc., may be exaggerated for clarity, and like reference numerals designate like elements. In addition, when a part such as a layer, a film, an area, or a plate is expressed as being on or above another part, not only when each part is directly above or directly above the other part but also another part between each part and another part This includes cases.

1 is a plan view of a display device according to an exemplary embodiment of the present invention. 2 is an exploded perspective view of a display device according to an exemplary embodiment, and FIG. 3 is a cross-sectional conceptual view of the display device after coupling according to an exemplary embodiment. 4 is a plan view of a display device according to a modification of the embodiment, and FIGS. 5 and 6 are exploded perspective views of the display device according to a modification of the embodiment.

1 to 6, the display device according to the present exemplary embodiment includes a display assembly 1000, a backlight assembly 2000, and a housing member 500 accommodating the display assembly 1000 and the backlight assembly 2000. Include.

In this case, the display assembly 1000 includes a display panel 100 having a display area D and a peripheral area P, and driving circuit units 200, 210, 220, and 230. The backlight assembly 2000 includes a conductive wiring 600 for a discharge path, an optical sheet 300, and a backlight unit 500.

First, the display assembly 1000 will be described.

The display panel 100 is provided between a lower substrate 110 having a pixel electrode (not shown), an upper substrate 120 having a common electrode (not shown), and a lower substrate 100 and an upper substrate 120. It includes a liquid crystal (not shown). The upper substrate 120 and the lower substrate 110 are defined as a display area D for displaying an image and a peripheral area P in which elements for applying power to the display area D are provided.

Although not shown, the upper substrate 120 includes a black matrix and red, green, and blue color filters on the bottom surface of the insulating substrate made of a transparent insulating material such as glass, to prevent optical interference between cell regions. An overcoat film made of an organic material provided on the color filter, and a common electrode made of a transparent conductive material such as indium tin oxide (ITO) or indium zinc oxide (IZO) on the overcoat film. .

Although not shown, the lower substrate 110 includes a plurality of gate lines arranged in one direction at regular intervals, a plurality of source lines arranged at regular intervals in a direction perpendicular to the gate line, and the gate lines and the source lines A plurality of pixel electrodes formed in a matrix form in a cross-defined pixel region and a plurality of thin film transistors that are switched by a signal applied to the gate line to transfer a signal of a source line to each pixel electrode. The thin film transistor includes a gate electrode, a gate insulating film, an active layer and an ohmic contact layer, a source electrode and a drain electrode. And a protective layer for insulating between the thin film transistor and the pixel electrode.

The display panel 100 is manufactured by combining the lower substrate 110 and the upper substrate 120 by using a sealing member (not shown) such as a sealant and forming a liquid crystal therebetween. The display panel 100 changes an electric field between the pixel electrode and the common electrode to change the arrangement of liquid crystals provided between the pixel electrode and the common electrode, thereby controlling the light transmittance to display an image. Polarizers (not shown) may be attached to upper and lower surfaces of the display panel 100.

The driving circuit units 200, 210, 220, and 230 may be connected to the driving chip unit 130 through the driving chip unit 130 mounted on the lower substrate 110 of the display panel 100 and the flexible printed circuit board 210. The connected printed circuit board 200 is included.

The driving chip 130 is connected to the gate line and / or data line of the display panel 100 to apply the gate signal and / or data signal to the gate line and / or data line. Although one driving chip unit 130 is illustrated in the peripheral area P of the display panel 100, a plurality of driving chip units 130 may be mounted on the display panel 100 as needed. have. The printed circuit board 200 has a control unit 220 mounted thereon, and is electrically connected to the display panel 100 on which the driving chip unit 130 is mounted through the flexible printed circuit board 210. In addition, the printed circuit board 200 is provided with a separate ground unit 230 for discharging. The driving chip unit 130 operates according to a control signal of the controller 220. The controller 220 generates a predetermined control signal according to an input signal applied from the outside. The driving chip 130 may be mounted on the printed circuit board 200 or the flexible printed circuit board 210. Here, since the printed circuit board 200 is connected to the display panel 100 through the flexible printed circuit board 210, the printed circuit board 200 may be rotated and positioned in the lower region of the display panel 100. have. As a result, the size of the display device may be reduced.

Next, the backlight assembly 2000 will be described.

The backlight assembly 2000 is disposed in close contact with the display assembly 1000 to irradiate light to the display assembly 1000. As shown in FIGS. 2 and 3, the backlight assembly 2000 includes an optical unit provided between the backlight unit 400 for outputting light and the display panel 100 of the display unit 1000 and the backlight unit 400. The sheet 300 is provided. The conductive wiring part 600 for the discharge path is provided on the optical sheet 300.

The backlight unit 400 may be an edge type type including a light source (not shown) and a light guide plate (not shown). Of course, the present invention is not limited thereto, and a direct type in which a plurality of light sources (not shown) are disposed on one plane may be used. In this case, a cold cathode fluorescent lamp (CCFL) may be used as the light source, or a light emitting diode (LED) may be used.

The optical sheet 300 may use at least one diffusion plate or a brightness enhancing plate. In this case, the diffusion plate directs the light incident from the backlight unit 400 toward the front of the display panel 100 and diffuses the light to have a uniform distribution over a wide range. As the diffuser plate, it is preferable to use a film made of a transparent resin coated with a predetermined light diffusing member on both surfaces. The brightness improving plate transmits light parallel to its transmission axis and reflects light perpendicular to the transmission axis to improve brightness.

In the present embodiment, the conductive wiring part 600 for the discharge path is provided on the optical sheet 300, and the conductive wiring part 600 is a ground part of the printed circuit board 200 as shown in FIG. 1. Is connected to 230. As shown in FIG. 2, the conductive wiring part 600 for the discharge path includes a main wiring part 610 provided in an upper edge region of the optical sheet 300, and extends outside the optical sheet 300 to the ground part. An extension wiring portion 620 connected to 230 is included. In this case, the main wiring part 610 and the extension wiring part 620 may be manufactured as a single line. The main wiring part 610 and the extension wiring part 620 may be manufactured in the form of a conductive bar. It is preferable to manufacture the electrically conductive wiring part 600 for discharge paths using an electrically conductive tape here. Of course, a wire may be used instead of the conductive tape. That is, the conductive tape is extended along the circumference of the edge region of the optical sheet 300 to produce the main wiring portion 610, and the end thereof is extended to the outside of the optical sheet 300 to form the extension wiring portion 620. do. In this case, the conductive tape is preferably provided in the area of the optical sheet 300 corresponding to the peripheral area P of the display panel 100. At this time, the conductive wiring 600 for the discharge path is preferably attached on the optical sheet 300 by using an adhesive means having an adhesive. In addition, the optical sheet 300 to which the conductive wiring part 600 for discharge paths is attached may be attached to the lower surface of the display panel 100 using an adhesive means. In this case, the conductive tape may have adhesive properties instead of the adhesive means.

As a result, the static electricity applied to the display panel 100 flows along the conductive wiring 600 for the discharge path on the optical sheet 300 disposed adjacent to the display panel 100 so that the display panel 100 is discharged by static electricity. It can prevent damage. That is, since the surface of the display panel 100 is itself an insulator, its resistance is very large. The static electricity generated on the upper surface of the display panel 100 may move along the entire upper surface of the display panel 100, rather than a specific region of the display panel 100. Therefore, in the related art, the static electricity that has moved along the entire upper surface of the display panel 100 is induced to the conductive lines inside the display panel 100, that is, the gate line and the data line. This is because the resistance of the conductive wires inside the display panel 100 is smaller than that of the display panel 100. As a result, a problem arises in that the thin film transistor or the driving chip unit 210 connected to the conductive line is damaged by static electricity applied to the conductive lines in the display panel 100. However, in the present exemplary embodiment, the conductive wiring part 600 for the discharge path having a smaller wiring resistance than the conductive wires in the display panel 100 is positioned in the lower region of the display panel 100. 100) The static electricity that has moved along the entire upper surface may be induced to the conductive wiring part 600 for the discharge path. Since the conductive wires in the display panel 100 are made of a thin thin film, the wiring resistance thereof is larger than that of the conductive wiring part 600 for the discharge path of the present embodiment. That is, when the line width of the conductive wiring in the display panel 100 is 1, the conductive wiring part 600 for the discharge path is 10 to 10,000, and when the thickness of the conductive wiring in the display panel 100 is 1, the conductive path for the discharge path is 1. The wiring part 600 is 10-10000. Here, the wiring resistance is inversely proportional to the cross-sectional area of the wiring. That is, the larger the cross-sectional area of the wiring, the smaller the wiring resistance, and the smaller the cross-sectional area of the wiring, the larger the wiring resistance. Accordingly, the static electricity induced in the display panel 100 may not flow into the conductive wires in the display panel 100, but may flow into the conductive wires 600 for the discharge path under the display panel 100.

The static electricity introduced into the conductive wiring part 600 for the discharge path is primarily reduced by the conductive wiring part 600 for the discharge path. The static electricity flows along the conductive wiring part 600 for the discharge path, and is then completely discharged from the ground part 230 of the printed circuit board 200 to which the conductive path part 600 for the discharge path is connected. Accordingly, the conductive wiring 600 for the discharge path provided in the lower region of the display panel 100 acts as a lightning rod through which the surge is discharged, thereby effectively discharging ESD without affecting the operation of the display device or causing damage. Can be.

In the above description, the conductive wiring part 600 for the discharge path is provided in the form of a bar on the upper portion of the optical sheet 300 (ie, the area between the display panel 100 and the optical sheet 300). However, the present embodiment is not limited thereto, and the position and shape of the conductive wiring part 600 for the discharge path may be variously modified. That is, as in the modified example of FIGS. 4 and 5, the main wiring part 610 of the conductive wiring part 600 for the discharge path is formed on the entire lower surface of the peripheral area P of the display panel 100. It can be manufactured in a shape. This allows more efficient discharge of static electricity. In addition, the conductive wires 600 for the discharge path may be disposed on the upper portion of the backlight unit 400 (that is, the area between the optical sheet 300 and the backlight unit 400).

The backlight assembly 2000 provided with the display assembly 1000 and the conductive wiring 600 for the discharge path is accommodated in the accommodating member 500. In this case, a reflecting plate (not shown) may be provided on the bottom surface of the accommodating member 500. A mold frame and / or a chassis may be used as the accommodation member 500.

In the display device according to the present exemplary embodiment, the conductive wiring part 600 for the discharge path is not provided in the backlight assembly 2000, as in the modification of FIG. 6, and the inner wall of the accommodating member 500 is provided. Accordingly, the conductive wiring part 600 for the discharge path may be provided. That is, the conductive wirings 600 for the discharge path may be provided not only in the lower region but also in the side region of the display panel 100. As a result, static electricity induced on the upper surface of the display panel 100 may quickly flow into the conductive wiring unit 600 for the discharge path. Of course, the conductive wirings 600 for the discharge path may be provided on the bottom surface of the accommodating member 500. Although not shown, the extension wiring part 620 of the conductive wiring part 600 for the discharge path does not extend to the side of the housing member 500, but extends through the housing member 500 under the housing member 500. 500 may be connected to a separate ground provided on the lower side. Of course, as mentioned above, since the printed circuit board 200 is bent and positioned below the accommodating member 500, an extension wiring part 620 extending downward through the accommodating member 500 may be formed in the printed circuit board 200. It may be connected to the ground 230.

As described above, the present invention provides a conductive pass portion for the discharge path serving as a lightning rod in the lower region of the display panel, so that the static electricity applied to the display panel is introduced into and discharged from the conductive pass portion for the discharge path, and thus, an element in the display panel and the like. The connected drive chip can be protected from static electricity.

Although the invention has been described with reference to the accompanying drawings and the preferred embodiments described above, the invention is not limited thereto, but is defined by the claims that follow. Accordingly, one of ordinary skill in the art may variously modify and modify the present invention without departing from the spirit of the following claims.

Claims (8)

A display panel displaying an image; A ground part disposed outside the display panel; And at least one of a lower region and a side region of the display panel, wherein the display device comprises a conductive wiring portion for discharge paths connected to the ground portion. The method according to claim 1, The display device may further include a backlight assembly configured to provide light to the display panel. And a conductive wiring portion for the discharge path in a region between the backlight assembly and the display panel. The method according to claim 1, Providing a light to the display panel and further including a backlight assembly including an optical sheet and a backlight unit, And a conductive wiring part for the discharge path in the upper region of the optical sheet or the upper region of the backlight unit. The method according to claim 1, Further comprising a storage member for receiving the display panel, And a conductive wiring portion for the discharge path provided on the sidewall or bottom surface of the housing member. The method according to claim 1, The display panel includes a display area and a peripheral area, and the conductive wiring part for the discharge path is provided on at least a portion of the lower part of the peripheral area of the display panel. The method according to claim 1, A display device using a conductive tape as the conductive wiring portion for the discharge path. The method according to claim 6, The conductive tape has an adhesive property. The method according to claim 1, A printed circuit board electrically connected to the display panel; And a ground portion provided on the printed circuit board.

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