KR20100007612A

KR20100007612A - Display device

Info

Publication number: KR20100007612A
Application number: KR1020080068319A
Authority: KR
Inventors: 이윤정
Original assignee: 엘지이노텍 주식회사
Priority date: 2008-07-14
Filing date: 2008-07-14
Publication date: 2010-01-22

Abstract

A display device is disclosed. The display device includes a first substrate; A second substrate disposed on the first substrate; A conductive layer disposed on the second substrate; A printed circuit board disposed on the substrate; And a connection member disposed on the second substrate and the printed circuit board to electrically connect the conductive layer and the printed circuit board. Since the conductive layer and the printed circuit board are directly connected by the connecting member, the electric shock applied to the conductive layer can be efficiently absorbed.

Description

Display {DISPLAY DEVICE}

An embodiment relates to a display device.

As information processing technology develops, flat panel display devices such as LCD, PDP and AMOLED are widely used.

In particular, LCDs and AMOLEDs are used as portable display devices, and these display devices must be protected from electric shock such as static electricity.

Embodiments provide a display device that can be efficiently protected from an electric shock.

A display device according to an embodiment includes a first substrate; A second substrate disposed on the first substrate; A conductive layer disposed on the second substrate; A printed circuit board disposed on the first substrate; And a connection member disposed on the second substrate and the printed circuit board to electrically connect the conductive layer and the printed circuit board.

In the display device according to the embodiment, the conductive layer and the printed circuit board are directly connected by the connection member. Electrical shock such as static electricity applied to the conductive layer may be absorbed into the ground through the connection member and the printed circuit board.

Therefore, the display device according to the exemplary embodiment can efficiently absorb the electric shock applied from the upper side without passing through the first substrate.

Also, since both the second substrate and the printed circuit board are disposed on the first substrate, the step between the second substrate and the printed circuit board is reduced. Since the connecting member is disposed on the second substrate and the printed circuit board, the lifting phenomenon and the short circuit are reduced than when the connecting member is connected to the first substrate.

Thus, the display device according to the embodiment can be efficiently protected from an external electric shock.

In the description of the embodiments, each panel, member, frame, sheet, or substrate is described as being formed "on" or "under" of each panel, member, frame, sheet, or substrate. In the case, “on” and “under” include both being formed “directly” or “indirectly” through other components. In addition, the criteria for the top or bottom of each component will be described with reference to the drawings. The size of each component in the drawings may be exaggerated for description, and does not mean a size that is actually applied.

1 is a perspective view illustrating a liquid crystal display according to an embodiment. FIG. 2 is a cross-sectional view taken along the line A-A 'of FIG. 1.

1 and 2, a liquid crystal display device includes a liquid crystal panel 100, an ITO layer 200, a driver IC 300, a flexible printed circuit board (FPCB) 400, and a connection member ( 500).

The liquid crystal panel 100 displays an image by adjusting the intensity of light passing for each pixel. The liquid crystal panel 100 includes a TFT substrate 110, a color filter substrate 120, and a liquid crystal layer 130.

The TFT substrate 110 forms an electric field for each pixel to align the liquid crystal layer 130. The TFT substrate 110 is an IPS mode TFT array substrate.

For example, the TFT substrate 110 is disposed in a plurality of gate wires extending in a first direction, a plurality of data wires extending in a second direction, and an area where the gate wires and the data wires cross. It includes a plurality of thin film transistors.

In addition, the TFT substrate 110 includes pixel electrodes receiving a data signal and common electrodes receiving a common voltage signal through the data lines.

In this case, the pixel electrodes and the common electrodes may cross each other and be arranged in one pixel area.

In addition, the TFT substrate 110 includes a ground pad 150. The ground voltage is applied to the ground pad 150. The TFT substrate 110 includes a conductive pattern for absorbing an electric shock applied from below, and the conductive pattern is electrically connected to the ground pad 150.

The color filter substrate 120 is disposed to face the TFT substrate 110. The color filter substrate 120 includes color filters corresponding to each pixel. The color filter substrate 120 exposes a portion of the TFT substrate 110 and covers the TFT substrate 110.

The liquid crystal layer 130 is interposed between the color filter substrate 120 and the TFT substrate 110. The liquid crystal layer 130 is aligned by an electric field formed by the pixel electrodes and the common electrodes.

The liquid crystal panel 100 includes a sealing member 140 for sealing the liquid crystal layer 130.

The ITO layer 200 is disposed on the color filter substrate 120. Examples of the material used as the ITO layer 200 include indium tin oxide (ITO) or indium zinc oxide (IZO).

The ITO layer 200 is transparent and a conductive layer. The ITO layer 200 absorbs an electric shock such as static electricity applied to the color filter substrate 120 from the upper side and applies it to the ground.

Polarization filters may be disposed on the ITO layer 200 and below the TFT substrate 110 to improve characteristics of an image displayed by the liquid crystal panel 100.

The driver IC 300 is mounted on the TFT substrate 110 in a chip on glass (COG) method. The driver IC 300 drives the liquid crystal panel 100.

The flexible printed circuit board 400 is disposed on the TFT substrate 110 and is electrically connected to the TFT substrate 110. The flexible printed circuit board 400 is connected to a main board which generates a signal for driving the liquid crystal panel 100.

The flexible printed circuit board 400 includes a ground wire 410 electrically connected to the ground. The ground wire 410 is disposed on the ground pad 150 and contacts the ground pad 150. In addition, the ground wire 410 covers the ground pad 150. In addition, the ground wiring 410 is disposed under the connection member 500 and contacts the connection member 500.

In addition, the flexible printed circuit board 400 includes a body portion 420 and an extension portion 430 extending from the body portion 420. The extension part 430 covers the ground pad 150.

The connection member 500 is disposed on the color filter substrate 120 and the flexible printed circuit board 400. In more detail, the connection member 500 is disposed on the ITO layer 200.

The connection member 500 contacts the ITO layer 200 and connects the ITO layer 200 and the ground wiring 410.

The connection member 500 is, for example, a conductive tape and is bonded to the ITO layer 200 and the flexible printed circuit board 400.

The liquid crystal display according to the embodiment includes the connection member 500. The connection member 500 directly connects the ITO layer 200 and the ground wiring 410.

Therefore, the static electricity applied from the upper portion of the liquid crystal panel 100 is absorbed into the ground via the ITO layer 200 and the ground wiring 410. That is, the static electricity is absorbed in the ground without passing through the TFT substrate 110.

Therefore, the liquid crystal display according to the embodiment can efficiently absorb static electricity.

In addition, the connection member 500 is disposed on the color filter substrate 120 and the flexible printed circuit board 400. Therefore, the height difference between the areas where the connection member 500 is attached is reduced, and the phenomenon that the connection member 500 is lifted up can be prevented.

That is, when the connecting member electrically connects the ITO layer and the TFT substrate, and the ITO layer and the flexible printed circuit board are connected through the wiring formed on the TFT substrate, the connection between the ITO layer and the TFT substrate Due to the height difference, the connection member is lifted up.

However, the liquid crystal display according to the exemplary embodiment may reduce the height difference between the areas where the connection member 500 is attached by the thickness of the flexible printed circuit board 400.

Preferably, the thickness T1 of the flexible printed circuit board 400 is substantially the same as the thickness T2 of the color filter substrate 120.

More preferably, the thickness T1 of the flexible printed circuit board 400 is the sum of the thickness of the ITO layer 200, the thickness of the color filter substrate 120, and the thickness of the liquid crystal layer 130 (T3). Is substantially the same as

Therefore, the liquid crystal display according to the embodiment may prevent the phenomenon of lifting of the connection member 500 and prevent defects and short circuits caused by lifting of the connection member 500.

Accordingly, the liquid crystal display according to the embodiment can be better protected from electric shock.

Although the above description has been made based on the embodiments, these are merely examples and are not intended to limit the present invention. Those skilled in the art to which the present invention pertains may not have been exemplified above without departing from the essential characteristics of the present embodiments. It will be appreciated that many variations and applications are possible. For example, each component specifically shown in the embodiment can be modified. And differences relating to such modifications and applications will have to be construed as being included in the scope of the invention defined in the appended claims.

1 is a perspective view illustrating a liquid crystal display according to an embodiment.

FIG. 2 is a cross-sectional view taken along the line A-A 'of FIG. 1.

Claims

A first substrate;

A second substrate disposed on the first substrate;

A conductive layer disposed on the second substrate;

A printed circuit board disposed on the first substrate; And

And a connection member disposed on the second substrate and the printed circuit board to electrically connect the conductive layer and the printed circuit board.

The display device of claim 1, wherein the printed circuit board has a thickness corresponding to the second substrate.

The display device of claim 1, wherein the connection member is a conductive tape attached to the printed circuit board and the conductive layer.

The method of claim 1, wherein the first substrate comprises a ground pad to which a ground voltage is applied.

The printed circuit board includes a ground wire connected to the ground pad, covering the ground pad, and to which the ground voltage is applied.

The display device of claim 4, wherein the conductive layer is electrically connected to the ground wiring by the connection member.

The display device of claim 5, wherein the electrical shock applied to the conductive layer is absorbed through the connection member and the ground wiring to the ground to which the ground voltage is applied.

The liquid crystal display device of claim 1, further comprising a liquid crystal layer interposed between the first substrate and the second substrate,

The first substrate includes a pixel electrode and a common electrode forming an electric field for aligning the liquid crystal layer.