KR20060037635A - Liquid crystal display panel - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display panel in which electrostatic discharge wiring is formed to prevent damage to a driving IC caused by external static electricity. The present invention relates to a driving IC, a first wiring electrically connected to a driving IC, and a first wiring, but separated from the first wiring. A second wiring, and a third wiring electrically connected to the first wiring and electrically connected to the third wiring formed on the second substrate, to provide the third wiring with a driving signal input from the driving IC through the first wiring. A liquid crystal display panel comprising a conductor is provided.

As described above, according to the present invention, the electrostatic discharge wiring is adjacent to the common voltage wiring to discharge the static electricity flowing through the common voltage wiring to the electrostatic discharge wiring, thereby preventing damage to the driving IC caused by the static electricity, thereby increasing the reliability of the device.

Static electricity, discharge, liquid crystal display panel, common voltage wiring

Description

Liquid crystal display panel {LIQUID CRYSTAL DISPLAY PANEL}

1 is a cross-sectional view of a general TFT liquid crystal display panel.

2 is a schematic layout view of a liquid crystal display device panel according to an exemplary embodiment of the present invention.

FIG. 3 is a detailed view of region II in the liquid crystal display shown in FIG. 2.

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

110, 210: substrate

120: common electrode

130, 230: short point

140: seal line

150, 250: common voltage wiring

160: TFT

170, 270: TFT substrate

280: drive IC

290: electrostatic discharge wiring

351: common voltage wiring protrusion

352: region adjacent the common voltage wiring protrusion

353 common voltage wiring flat portion                 

391: electrostatic discharge wiring protrusion

The present invention relates to a liquid crystal display panel including an electrostatic discharge wiring.

In general, a technology for mounting a driving IC (integrated circuit) to a panel for supplying a driving signal for driving a thin film transistor (TFT) liquid crystal display in a liquid crystal display device includes a wire bonding (WB) method and a TAB (tape) method. It is divided into automated bonding (COB) method and chip on glass (COG) method.

The WB method is a method in which a panel electrode and a driving IC are connected using gold (Au) wires, and the TAB method is a method in which a package in which a driver IC is connected to a film carrier is mounted on a panel. The COG method is a technology in which a bump is formed on a bare chip itself and then mounted on a panel.

1 is a cross-sectional view of a general TFT liquid crystal display panel. Referring to FIG. 1, the common electrode 120 formed on the color filter substrate 110 is electrically connected to the common voltage line 150 on the TFT substrate 170 on which the TFT 160 is formed through the short point 130. The common voltage wiring 150 is connected to a driving IC (not shown) and receives a driving signal from the driving IC to apply a common voltage to the common electrode 120 of the color filter substrate 110 through the short circuit 130. do.

 In such a structure, externally generated static electricity mostly flows through the short-circuit point 130 and the common voltage wiring 150 through the color filter substrate 110 to the driver IC, which damages the driver IC and thus recovers an unrecoverable state. There is a problem that results.

The technical problem to be achieved by the present invention is to prevent damage to the driving IC by static electricity generated from the outside.

According to an aspect of the present invention, there is provided a liquid crystal display panel including an electrostatic discharge wiring, including: a driving IC for providing a driving signal; a first wiring formed on the first substrate and electrically connected to the driving IC; A second wiring formed on the first substrate adjacent to the first wiring and not electrically connected to the first wiring, and electrically connected to a third wiring electrically connected to the first wiring and formed on the second substrate And a conductor that provides a drive signal input from the drive IC to the third wire through the first wire.

In addition, according to an embodiment of the present invention, the second wiring is grounded.

In addition, according to an embodiment of the present invention, the first wiring or the second wiring has a protruding pattern protruding toward the second wiring or the first wiring, and both the first wiring and the second wiring Protruding patterns protruding toward each other may be formed in the.

In addition, according to an embodiment of the present invention, the first wiring and the second wiring are made of the same metal.

In addition, according to an embodiment of the present invention, the first wiring and the second wiring are formed on the same layer.

Hereinafter, a liquid crystal display panel having an electrostatic discharge wiring according to the present invention will be described in detail with reference to the accompanying drawings.

2 is a schematic layout view of a liquid crystal display panel according to an exemplary embodiment of the present invention. The cross section of the liquid crystal display panel shown in FIG. 2 is approximately similar to that shown in FIG.

2 and 1, the liquid crystal display panel according to the present exemplary embodiment includes a TFT disposed between the TFT substrate 270, the common electrode substrate 210, and the two substrates 210 and 270 facing each other. A line 240, a short point 230, and a driver IC 280 mounted on the TFT substrate 270 in a COG manner.

The seal line 240 extends along the circumference of the common electrode substrate 210 to seal the TFT substrate 270 and the common electrode substrate 210. The short point 230 transfers a common voltage from the TFT substrate 270 to the common electrode substrate 210 and is located near two opposite corners of the driver IC 280. However, the position and number of the short circuit points 230 may vary depending on the size of the liquid crystal display panel.

The common voltage wiring 250 and the electrostatic discharge wiring 290 are formed on the TFT substrate 270.

The common voltage wiring 250 is connected to the driving IC 280 to receive a common voltage from the driving IC 280. The common voltage line 250 is also electrically connected to the short point 230 to transmit a common voltage to the common electrode 120 of the common electrode display panel 210 (see FIG. 1) through the short point 230. As described above, the short point 230 is far from the driving IC 280 because an external static electricity or the like is directly driven down the TFT 230 from the common electrode 120 to the TFT substrate 270. This is to prevent damaging the IC 280. On the other hand, the common voltage wiring 250 is located outside the seal line 240.

The electrostatic discharge wire 290 is grounded, and the electrostatic discharge wire 290 is located on the outer side of the common voltage wire 250, that is, the side opposite to the seal line 240 around the common voltage wire 250. In addition, the static discharge wiring 290 is adjacent to the common voltage wiring 250 but does not contact the common voltage wiring 250.

In this way, the external high-voltage static electricity flowing into the common voltage wiring 250 through the common electrode substrate 210 and the shorting point 230 is discharged through the static discharge wiring 290 before being transferred to the driving IC 280. Can be. However, since the common voltage is much smaller than the static electricity, the common voltage is not discharged through the static discharge wiring 290.

The common voltage line 250 and the electrostatic discharge line 290 are preferably formed on the same layer, and may be formed of the same metal. In addition, the two wirings 250 and 290 are preferably formed at the same time in the same process.

An example of the common voltage wiring and the electrostatic discharge wiring will now be described in detail with reference to FIG. 3.

FIG. 3 is a detailed view of region II in the liquid crystal display shown in FIG. 2. In FIG. 3, reference numeral 350 denotes the common voltage wiring 250 of FIG. 2, and reference numeral 390 denotes the electrostatic discharge wiring 290 of FIG. 2.

As shown in FIG. 3, protruding patterns such as the common voltage wiring protrusion 351 and the electrostatic discharge wiring protrusion 391 are formed in the common voltage wiring 350 and the electrostatic discharge wiring 390. The two protrusions 351 and 391 have a sharp pointed end like a triangle, and the ends of the two protrusions 351 and 391 face each other at a minute interval. When static electricity flows into the common voltage line 350, charges are collected at the pointed protrusion 351, and when a large amount of charge is collected, the charge is discharged to the protrusion 391 of the electrostatic discharge line 390 and flows to ground. However, only one of the common voltage wiring 350 and the electrostatic discharge wiring 390 may have the protrusions 351 and 391, and the shape of the protrusions 351 and 391 may also be changed.

In addition, the width of the portion 352 adjacent to the protrusion 351 of the common voltage wiring 350 is larger than the width of the other portion 353. Therefore, since the resistance of the proximal portion 352 of the protrusion is smaller than that of the other portion 353, the charge is well collected, so that the discharge in the common voltage wiring protrusion 351 may be more likely to occur.

Therefore, according to the liquid crystal display panel having the electrostatic discharge wiring according to the present invention, the electrostatic discharge wiring is formed adjacent to the common voltage wiring to discharge the static electricity flowing through the common voltage wiring, thereby driving the IC by the static electricity through the common voltage wiring. There is an effect of preventing damage to increase the reliability of the device.

In addition, since the electrostatic discharge wiring can be formed at the same time during the common voltage wiring forming process, the process is simple and the implementation is easy.

Although the preferred embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (12)

A first substrate and a second substrate facing each other, A liquid crystal layer interposed between the first substrate and the second substrate, A driving IC mounted on the first substrate and providing a driving signal to the first substrate, A first wiring formed on the first substrate and electrically connected to the driving IC; A second wiring formed on the first substrate and adjacent to and separated from the first wiring; and A conductive electrically connected to the first wiring and electrically connected to a third wiring formed on the second substrate to provide a driving signal input from the driving IC to the third wiring through the first wiring; sieve Liquid crystal display panel comprising a. In claim 1, And the second wiring is grounded. In claim 2, And the second wiring includes a protrusion protruding toward the first wiring. In claim 3, The first wiring includes a protrusion facing the protrusion of the second wiring and protruding toward the second wiring. In claim 2, And the first wiring includes a protrusion protruding toward the second wiring. In claim 5, The first wiring has a wiring width of a portion adjacent to the protruding portion wider than a width of the remaining portion. In any one of claims 3 to 6, The liquid crystal display panel of which the protrusion of the first or second wire is sharp. In any one of claims 3 to 6, The liquid crystal display panel of which the wiring width of a portion adjacent to the protrusion of the first or second wiring is wider than the width of the remaining portion. In any one of claims 1 to 6, The liquid crystal display panel of which the first wiring and the second wiring are made of the same metal. In any one of claims 1 to 6, And the first wiring and the second wiring are formed on the same layer. In any one of claims 1 to 6, The second wiring is positioned outside the first wiring. In any one of claims 1 to 6, And wherein the conductor is at a corner opposite to the driving IC.

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