KR20060094198A - Display apparatus - Google Patents

Abstract

A display device capable of improving the yield of a product is disclosed. The display device includes a repair line for transmitting a data signal, and a dummy line positioned between the display area and the repair line. The dummy line distributes the static electricity flowing into the display area along the repair line and the data lines to reduce the intensity of the static electricity. Accordingly, the display device can prevent the gate lines and the data lines in the display area from being disconnected due to static electricity, thereby improving the yield of the product.

Derby Line, Repair Line, Static Electricity

Description

Display device {DISPLAY APPARATUS}

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

FIG. 2 is an enlarged view illustrating an enlarged lower side of a dummy line of the liquid crystal display illustrated in FIG. 1.

3 is an enlarged plan view illustrating a portion 'A' illustrated in FIG. 2.

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

5 is an enlarged plan view illustrating a portion 'B' illustrated in FIG. 2.

FIG. 6 is a cross-sectional view taken along the line II-II ′ of FIG. 5.

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

100 liquid crystal display panel 110 transparent substrate

120 thin film transistor 130 pixel electrode

140: gate insulating film 200: driving chip

300: gate driving circuit DL: data lines

GL: Gate lines RL1, RL2: Repair line

DML1, DML2: Dummy Line

The present invention relates to a display device, and more particularly, to a display device that can improve the yield of the product.

In general, a liquid crystal display device includes a liquid crystal display panel including an array substrate, a color filter substrate provided to face the array substrate, and a liquid crystal layer formed between the array substrate and the color filter substrate.

The array substrate includes data lines and gate lines that are insulated from and cross the data lines, and a thin film transistor (hereinafter, referred to as TFT) is provided in a matrix form. The array substrate is formed with pixels defined by data lines and gate lines. When the data line is disconnected from a specific pixel, the data signal may not be applied to the pixels including the data line in which the disconnection occurs in the direction in which the data signal is transmitted from the pixel. Since the pixels to which the data signal is not applied cannot display a normal image, display quality of the liquid crystal display is degraded.

The data repair line is electrically connected to the data line to transmit a data signal to display a normal image even when the data line is disconnected. The data repair line is positioned to surround the pixels and is provided on the same layer as the gate lines.

Static electricity is generated due to a cause such as friction generated in the manufacturing of the array substrate, and the generated static electricity flows into the pixels through various wires formed on the array substrate. In particular, the static electricity transferred to the data line along the data repair line flows to the pixel side along the data line, thereby disconnecting the data line.

An object of the present invention is to provide a display device that can improve the yield of the product by controlling the static electricity.

A display device according to one aspect for realizing the above object of the present invention includes a display panel and a first driver.

The display panel is divided into a display area for displaying an image corresponding to the video signal, and a peripheral area adjacent to the display area. The display panel is provided with signal lines for transmitting an image signal, a repair line provided in a peripheral area and connected to the signal line when the signal line is disconnected, and provided between the repair line and the display area and introduced through the repair line. And a dummy line for dissipating static electricity. The first driver is provided in a peripheral area of the display panel to provide an image signal through signal lines.

According to the display device, the dummy line reduces the intensity of the static electricity by distributing the static electricity applied to the signal lines through the repair line, thereby preventing the signal lines in the display area from being disconnected due to the static electricity.

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

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

Referring to FIG. 1, the liquid crystal display according to the present invention receives various signals and outputs a liquid crystal display panel 100 for displaying an image, a data signal for driving the liquid crystal display panel 100, and a gate control signal. And a gate driving circuit 300 outputting a gate signal in response to the gate control signal.

In more detail, the liquid crystal display panel 100 is divided into a display area DA in which the image is displayed, and a peripheral area PA adjacent to the display area DA and in which the image is not displayed.

The liquid crystal display panel 100 may be electrically connected to the gate driving circuit 300 to transmit the gate signal, and may be electrically connected to the driving chip 200 to transmit the data signal. Thin film transistors (TFTs) 120 connected to data lines DL and connected to the gate lines GL and the data lines DL to apply and block a signal voltage. The pixel electrode 130 connected to the TFT 120 is provided.

The gate lines GL extend in a first direction D1 and are disposed in a second direction D2 perpendicular to the first direction D1. The data lines DL are insulated from the gate lines GL, extend in the second direction D2, and are disposed in the first direction D1. A pad portion (not shown) is formed at a first end of the data lines DL adjacent to the driving chip 200 and the pad portion is electrically connected to the driving chip 200.

The TFT 120 acting as a switching element is provided in the display area DA, and applies and cuts off a signal voltage to a pixel defined by each data line and gate line.

The pixel electrode 130 provides the signal voltage applied from the TFT 120 to a liquid crystal layer (not shown) provided on the TFT 120.

When the data lines DL are disconnected, the liquid crystal display panel 100 further includes a repair unit RL electrically connected to the disconnected data line to transmit the data signal.

In the present exemplary embodiment, the liquid crystal display panel 100 includes a repair line RL for transmitting the data signal when the data lines DL are disconnected, but the gate lines GL. The disconnection may further include a repair portion for a gate line for transmitting the gate signal.

The repair unit RL is provided in the peripheral area PA and partially surrounds the display area DA. The repair unit RL is insulated from and crosses a first end of the data lines DL and a second end of the data lines DL opposite to the first end.

The dummy part DML is disposed between the repair line RL and the gate line adjacent to the repair part RL. The dummy part DML is disposed in the peripheral area PA so as to face the display area DA to face the driving chip 200 and to be insulated from and cross the second ends of the data lines DL.

The dummy part DML weakens the trimmer by distributing static electricity introduced along the repair part RL. Accordingly, the liquid crystal display panel 100 may prevent pixel defects caused by static electricity flowing into the display area DA along the repair part RL, thereby improving product yield.

The driving chip 200 is driven on the source side of the peripheral area PA of the liquid crystal display panel 100. The driving chip 200 may be composed of two or more chips separated into a data line chip and a gate line chip, or a single chip integrating the chips. The driving chip 420 is mounted on the liquid crystal display panel 100 by a chip on glass (COG) process, and is electrically connected to the data lines DL and the gate driving circuit 300.

The gate driving circuit 300 is provided at a gate side of the peripheral area PA of the liquid crystal display panel 100. The gate driving circuit 300 is formed in the peripheral area PA in the process of forming the TFT 120.

The gate driving circuit 300 may be embedded in the driving chip 200 or may be formed as a separate chip and mounted on the gate side of the peripheral area PA. When the gate driving circuit 300 is embedded in the driving chip 200, the driving chip 200 is electrically connected to the gate lines GL, and outputs the gate signal to output the gate lines. GL).

FIG. 2 is an enlarged view illustrating an enlarged lower side of a dummy part of the liquid crystal display illustrated in FIG. 1.

Referring to FIG. 2, the display area DA is formed of at least one pixel PX, and the TFT 120 is provided in the pixel PX.

The repair unit RL includes first and second repair lines RL1 and RL2, and the first and second repair lines RL1 and RL2 are spaced apart from each other at predetermined intervals. In this embodiment, the repair unit RL consists of two repair lines RL1 and RL2. The number of repair lines RL1 and RL2 may be increased or decreased depending on the size of the liquid crystal display panel 100 and the structure of the lines GL, DL, RL, and DML provided in the liquid crystal display panel 100. Can be.

The repair unit RL may perform its function with only one repair line, but includes two or more repair lines in case the repair lines RL1 and RL2 are disconnected by external factors such as static electricity.

The first repair line RL1 is adjacent to the display area DA. The second repair line RL2 surrounds the first repair line RL1 and is located farther from the display area DA than the first repair line RL1.

The dummy part DML is provided between the gate line adjacent to the second end of the data lines DL and the first repair line RL1. The dummy part DML includes first and second dummy lines DML1 and DML2. The number of the dummy lines DML1 and DML2 may be increased or decreased depending on the size of the liquid crystal display panel and the arrangement of the lines GL, DL, RL, and DML.

The first and second dummy lines DML1 and DML2 extend in the first direction D1 and are spaced apart from each other at predetermined intervals in the second direction D2. The first dummy line DML1 is adjacent to the display area DA. The second dummy line DML2 is interposed between the first dummy line DML1 and the first repair line RL1.

The liquid crystal display panel 100 is electrically connected to the first and second repair lines RL1 and RL2 when the first and second repair lines RL1 and RL2 are disconnected, and transmits the data signal. It further comprises a repair part SRL.

The sub repair part SRL is positioned adjacent to the second end of the data lines DL in the peripheral area PA and is adjacent to the gate driving circuit 300. When disconnection occurs in the first and second repair lines RL1 and RL2 adjacent to the second ends of the data lines DL, the sub repair part SRL may be the sub repair part SRL. The first and second repair lines RL1 and RL2 are electrically connected to receive the data signal from the repair unit RL and transmit the received data signal to the repair unit RL.

For example, when the first repair line RL1 positioned at the second end side of the data lines DL is disconnected, the sub repair unit SRL may be configured to include the first and second repair lines RL1 and RL2. ) Electrically receives the data signal from the first repair line RL1, and the sub repair unit SRL transmits the received data signal to the second repair line RL2.

3 is an enlarged plan view illustrating a portion 'A' illustrated in FIG. 2.

Referring to FIG. 3, the second ends of the data lines DL positioned in the peripheral area PA intersect the repair part RL and the dummy part DML.

The first and second repair lines RL1 and RL2 positioned on the second end side of the data lines DL are positioned in parallel with the gate lines GL. When a disconnection occurs in a specific data line among the data lines DL, the second end of the disconnected data line is the first short region SA1 crossing the first repair line RL1. The repair line RL1 is laser-welded, and the first repair line RL1 and the data line are electrically connected to each other.

Although not shown in the drawing, the data lines DL intersect the first end of the driving chip 200 and the first repair line RL1. Therefore, the first end of the data line where the disconnection occurs is welded with the first repair line RL1 by laser at a portion that crosses the first repair line RL1.

As such, when a specific data line is disconnected, the first and second ends of the data line where the disconnection occurs are welded with the first repair line RL1 by laser to be electrically connected to the first repair line. Accordingly, the disconnected data line is transmitted from the first and second ends to the point where the disconnection occurred.

In addition, since the first repair line RL1 may be disconnected, a second end of the data line where the disconnection is generated is concave with a laser in the second short region SA2 crossing the second repair line RL2. And is electrically connected to the second repair line RL2. Although not shown in the drawing, the second repair line RL2 intersects with the first end of the data line where the disconnection occurs, similarly to the first repair line RL1. Therefore, the first end of the data line where the disconnection occurs is welded to the first repair line RL1 by a laser and electrically connected thereto.

The first and second dummy lines DML1 and DML2 are disposed in parallel with the gate lines GL and cross the second ends of the data lines DL. When the static electricity is applied to the second end side of the data lines DL through the repair part RL, the display area may pass through a portion where the data lines DL and the dummy part DML cross each other. It flows into DA) side. The static electricity is also applied to the first and second dummy lines DML1 and DML2 at the point where the data lines DL and the dummy part DML intersect, so that the first and second dummy lines DML1, DML2).

As such, the dummy part DML reduces the intensity of static electricity by dispersing the static electricity before the static electricity flows into the display area DA. Accordingly, the liquid crystal display panel 100 may have the data lines DL and the gate lines GL positioned in the display area DA even when the static electricity flows into the display area DA. Can be prevented from disconnection.

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

Referring to FIG. 4, the gate lines GL, the first and second dummy lines DML1 and DML2, and the first and second repair lines RL1 and RL2 are transparent substrates through which light is transmitted. On 110).

The gate lines GL, the first and second dummy lines DML1 and DML2, and the first and second repair lines RL1 and RL2 are spaced apart from each other at predetermined intervals, and are made of aluminum (Al) or Aluminum alloy such as aluminum neodymium (AlNd), made of a conductive metal material such as chromium (Cr), molybdenum (Mo) and the like.

The first and second dummy lines DML1 and DML2 are interposed between the gate lines GL and the first and second repair lines RL1 and RL2.

A gate insulating layer 140 is formed on the transparent substrate 110 on which the gate lines GL, the first and second dummy lines DML1 and DML2, and the first and second repair lines RL1 and RL2 are formed. ) Is provided. The gate insulating layer 140 is formed of an insulating material such as silicon oxide (SiO ₂ ) or silicon nitride (SiN _X ) which has good adhesion with a metal material and suppresses formation of an air layer at an interface.

The data lines DL are provided on an upper surface of the gate insulating layer 140. When disconnection occurs, the data lines DL are shorted with the first and second repair lines RL1 and RL2 in the first and second short regions SA1 and SA2, respectively, so that the first and second lines are shorted. It is electrically connected to the repair line.

Although not shown in the drawing, the wirings GL, DL, RL, and DML are formed together with the TFT 120. In addition, a passivation layer and an organic insulating layer are further provided on the gate insulating layer 140 including the data lines DL to protect the wirings GL, DL, RL, and DML.

5 is an enlarged plan view illustrating a portion 'B' illustrated in FIG. 2, and FIG. 6 is a cross-sectional view taken along the line II-II 'of FIG. 5.

Referring to FIG. 5, the sub repair line SRL is branched from the main line ML, which extends in the first direction D1, and is branched from the main line ML in the second direction D2. The first and second sub lines SL1 and SL2 are formed. The first and second sub lines SL1 and SL2 are positioned to face each other with respect to the main line ML. The first subline SL1 is positioned above the first repair line RL1, and the second subline SL2 is positioned above the second repair line RL2.

As illustrated in FIG. 6, the first and second repair lines RL1 and RL2 are spaced apart at predetermined intervals on the transparent substrate 110. The gate insulating layer 140 is obtained on the transparent substrate 110 on which the first and second repair lines RL1 and RL2 are formed, and the sub repair line SRL is formed on an upper surface of the gate insulating layer 140. It is provided.

The first subline SL1 partially overlaps the first repair line RL1, and the second subline SL2 partially overlaps the second repair line RL2. When the first repair line RL1 or the second repair line RL2 is disconnected, the first and second sub lines SL1 and SL2 are connected to the first and second repair lines RL1 and RL2, respectively. The first and second repair lines RL1 and RL2 are electrically connected to the first and second repair lines RL2 by a laser irradiated to the overlapped areas SA3 and SA4.

According to the present invention described above, the liquid crystal display device includes a dummy part disposed between the display area and the repair part, and the dummy part reduces static electricity intensity by dispersing static electricity flowing into the display area along the repair part and the data lines. Let's do it. Accordingly, the liquid crystal display device can prevent the gate lines and the data lines located in the display area from being disconnected due to static electricity, thereby improving the yield of the product.

Although described above with reference to the embodiments, those skilled in the art can be variously modified and changed within the scope of the invention without departing from the spirit and scope of the invention described in the claims below. I can understand.

Claims (9)

A display area for displaying an image corresponding to an image signal, and a peripheral area adjacent to the display area, and signal lines for transmitting the image signal, and the signal line when the signal line is disconnected in the peripheral area. A display panel including a repair line electrically connected to each other, and a dummy line disposed between the repair line and the display area to dissipate static electricity introduced through the repair line; And And a first driver provided in the peripheral area to provide the image signal to the signal lines. The method of claim 1, wherein the signal lines, Gate lines extending in a first direction; And And a data line extending in a second direction perpendicular to the first direction, the first end including data lines electrically connected to the first driver. The display device of claim 2, wherein the repair line partially surrounds the display area and is insulated from and crosses a second end of the data lines facing the first end. 4. The display device of claim 3, wherein the dummy line is positioned to face the first driver and is insulated from and crosses a second end of the data lines. The display device of claim 2, wherein the display panel includes at least two dummy lines. The display device of claim 2, wherein the display panel includes at least two repair lines. The display device of claim 6, wherein the display panel further comprises a sub repair line electrically connected to the repair line when the two repair lines are disconnected. The display device of claim 7, wherein the sub repair line is positioned on a different layer from the repair line and partially crosses the repair line. The display device of claim 2, wherein the data lines are on different layers from the gate lines, and the dummy line and the repair line are on the same layer as the gate lines.

Images