KR101932105B1 - Liquid crystal display panel and liquid crystal display device comprising the same - Google Patents

Abstract

The present invention relates to a liquid crystal display panel capable of preventing electrostatic failure and a liquid crystal display device including the liquid crystal display panel. The liquid crystal display panel according to the present invention includes a plurality of signal pads and a pad portion having a ground pad, ; A second substrate bonded to the first substrate with a liquid crystal layer interposed therebetween; A transparent conductive layer formed on an upper surface of the second substrate; And a grounding path member electrically connecting the transparent conductive layer to the grounding pad.

Description

TECHNICAL FIELD [0001] The present invention relates to a liquid crystal display panel and a liquid crystal display device including the liquid crystal display panel.

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display panel and a liquid crystal display device including the same that can prevent electrostatic failure.

2. Description of the Related Art In recent years, various electronic devices such as a notebook computer, a monitor, a television, a portable information device, a mobile communication terminal, and the like have been developed, and a demand for a flat panel display device that can be applied thereto is gradually increasing. The flat panel display device may be a liquid crystal display device, a plasma display panel, an organic light emitting display device, or the like. At present, among the above flat panel display devices, liquid crystal display devices are most widely used.

The liquid crystal display device displays an image by adjusting the light transmittance of the liquid crystal using an electric field. Such a liquid crystal display device can be distinguished by a vertical electric field system and a horizontal electric field system depending on the direction of the electric field for driving the liquid crystal.

The vertical electric field type liquid crystal display device drives TN (Twisted Nematic) mode liquid crystal by a vertical electric field between a common electrode formed on an upper substrate and a pixel electrode formed on a lower substrate. Such a vertical electric field type liquid crystal display device has a disadvantage that the aperture ratio is large, but the viewing angle is narrow.

In a horizontal electric field type liquid crystal display device, a liquid crystal of an in plane switch mode is driven by a horizontal electric field between a pixel electrode arranged in parallel with a lower substrate and a common electrode. Such a horizontal electric field type liquid crystal display device has a wide viewing angle advantage.

1 is a cross-sectional view schematically showing a general horizontal electric field type liquid crystal display device.

Referring to FIG. 1, a general horizontal electric field type liquid crystal display device includes a liquid crystal display panel 10, a front case 20, and a ground path member 30.

The liquid crystal display panel 10 includes a lower substrate 13 and an upper substrate 15 bonded together with a liquid crystal layer 11 of an in-plane switch mode.

The lower substrate 13 includes a pixel electrode and a common electrode formed in parallel to a pixel region defined by a gate line and a data line.

The upper substrate 15 includes a color filter layer formed to correspond to each pixel region, and a transparent conductive layer 17. The upper substrate 15 is bonded to the lower substrate 13 with the liquid crystal layer 11 interposed therebetween by a sealing member 19.

The transparent conductive layer 17 is made of a transparent conductive metal material such as ITI (Indium Tin Oxide) and is formed on the upper surface of the upper substrate 15. The transparent conductive layer 17 serves to prevent the static electricity ES generated by the electrification of the upper substrate 15 from flowing into the liquid crystal layer 11. [

The liquid crystal display panel 10 further includes a lower polarizer 14 attached to the lower surface of the lower substrate 13 and an upper polarizer 18 attached to the upper surface of the transparent conductive layer 17.

The front case 20 surrounds the front edge of the liquid crystal display panel 10 and supports and protects the liquid crystal display panel 10. The front case 20 is made of a metal material.

The grounding path member 30 is attached to the front case 20 so as to be electrically connected to the edge portion of the transparent conductive layer 19 so that the static electricity ES blocked by the transparent conductive layer 19 is transferred to the front case 20 Discharge.

Such a general horizontal electric field type liquid crystal display device forms a horizontal electric field in the liquid crystal layer 11 by the data voltage and the common voltage applied to the pixel electrode and the common electrode of the liquid crystal display panel 10, (Not shown) to adjust the light transmittance to realize a desired image. The liquid crystal display device of the general horizontal electric field type uses a transparent conductive layer 19 to block the static electricity ES generated in the upper substrate 15 and to discharge the static electricity ES cut through the ground path member 30 Discharging to the front case 20 makes it possible to prevent the electrostatic image quality defect due to the static electricity ES.

However, since a general horizontal electric field type liquid crystal display device can cause a bad contact between the grounding path member 30 and the transparent conductive layer 19 due to the flow of the front case 20 or the like, the electrostatic failure can be prevented completely And the arrangement of the liquid crystal molecules in the liquid crystal layer 11 is changed due to the pressing of the grounding path member 30, so that light leakage can be generated.

In recent years, a liquid crystal display device having a touch screen (or a touch panel) added to the liquid crystal display panel 10 described above or a liquid crystal display device having a touch screen built in the liquid crystal display panel 10 Display devices are widely used.

Even in the case of the liquid crystal display device having the touch screen built in, the static electricity may be generated according to the user's touch on the touch screen or the liquid crystal display panel 10. [ At this time, if the static electricity is not completely discharged due to the contact failure between the grounding path member 30 and the transparent conductive layer 19, the touch failure and the electrostatic image quality defect may occur.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to provide a liquid crystal display panel and a liquid crystal display device including the same that can prevent electrostatic failure.

According to an aspect of the present invention, there is provided a liquid crystal display panel including a first substrate including a plurality of signal pads and a pad having a ground pad; A second substrate bonded to the first substrate with a liquid crystal layer interposed therebetween; A transparent conductive layer formed on an upper surface of the second substrate; And a grounding path member electrically connecting the transparent conductive layer to the grounding pad.

The first substrate includes a ground link line electrically connected to the ground pad; And a contact hole exposing a part of the ground link line, wherein the ground path member is electrically connected to the ground link line through the contact hole and electrically connected to the transparent conductive layer.

The grounding path member may be a conductive paste that is dropped and cured between the transparent conductive layer and the contact hole, or may be a conductive adhesive member attached between the transparent conductive layer and the contact hole.

According to an aspect of the present invention, there is provided a liquid crystal display device including a first substrate including a plurality of signal pads and a pad having a ground pad, A liquid crystal display panel including a second substrate, a transparent conductive layer formed on an upper surface of the second substrate, and a grounding path member electrically connecting the transparent conductive layer to the ground pad; A circuit film formed to include a first ground wiring electrically connected to the ground pad and a plurality of bonding electrodes electrically connected to each of the plurality of signal pads; A driving integrated circuit mounted on the circuit film and supplying a data signal to the plurality of signal pads; And a printed circuit board formed to include a second ground wiring electrically connecting the first ground wiring and the contact support, and connected to the circuit film.

According to another aspect of the present invention, there is provided a liquid crystal display device including a first substrate including a plurality of signal pads and a pad having a ground pad, A liquid crystal display panel including a second substrate, a transparent conductive layer formed on an upper surface of the second substrate, and a grounding path member electrically connecting the transparent conductive layer to the ground pad; A circuit film formed to include a first ground wiring electrically connected to the ground pad and a plurality of bonding electrodes electrically connected to each of the plurality of signal pads; A driving integrated circuit mounted on the circuit film and supplying a data signal to the plurality of signal pads; A printed circuit board formed to include a second ground wiring electrically connecting the first ground wiring and the contact support and connected to the circuit film; And a front case electrically connected to a ground path member formed on the liquid crystal display panel so as to cover a top edge portion of the liquid crystal display panel.

Each of the liquid crystal display devices according to the embodiments of the present invention includes: a signal transmission member formed to include a third ground wiring electrically connected to the second ground wiring and connected to the printed circuit board; And a control board electrically connecting the third ground wiring to the contact support.

Each of the liquid crystal display devices according to the embodiments of the present invention includes a backlight unit for emitting light to the liquid crystal display panel; A support case for housing the backlight unit; And a guide panel supported by the support case to support the liquid crystal display panel, wherein the contact support may be the support case.

According to an aspect of the present invention, there is provided a liquid crystal display panel and a liquid crystal display device including the same, wherein a grounding path member is used to electrically connect the grounding pad of the first substrate and the transparent conductive layer of the second substrate, The static electricity blocked by the layer can be completely discharged through the grounding path member and the pad portion by the external contact so as to prevent the electrostatic image quality defect caused by the static electricity.

In addition, the liquid crystal display panel and the liquid crystal display device including the same according to the present invention do not require a ground path member which is attached to the front case and electrically connected to the transparent conductive layer, so that light leakage due to the pressing of the ground path member is not generated.

1 is a cross-sectional view schematically showing a general horizontal electric field type liquid crystal display device.
2 is a view schematically showing a liquid crystal display panel according to an embodiment of the present invention.
3 is a cross-sectional view showing a cross section taken along the line I-I 'shown in FIG.
4 is a view schematically showing a portion of the first substrate by enlarging the portion A shown in Fig.
5 is a cross-sectional view showing a section of II-II 'shown in FIG.
6 is a cross-sectional view for explaining another embodiment of the grounding path member shown in Fig.
7 is a cross-sectional view schematically showing a liquid crystal display device according to an embodiment of the present invention.
8 is a plan view schematically showing the liquid crystal display panel and the panel driving unit shown in FIG.
9 is a cross-sectional view for explaining a modification of the panel driving unit of the liquid crystal display device according to the embodiment of the present invention.
10 is a plan view schematically showing the liquid crystal display panel and the panel driving unit shown in FIG.
11 is a cross-sectional view illustrating a liquid crystal display device according to another embodiment of the present invention.

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

FIG. 2 is a schematic view of a liquid crystal display panel according to an embodiment of the present invention, and FIG. 3 is a cross-sectional view showing a cross section taken along line I-I 'shown in FIG.

2 and 3, a liquid crystal display panel 100 according to an embodiment of the present invention includes a ground pad GP connected to an external contact support, a pad portion PP having a plurality of signal pads SP, A second substrate 130 bonded to the first substrate 110 with the liquid crystal layer 120 therebetween, a transparent conductive layer 140 formed on the upper surface of the second substrate 130, And a grounding path member 150 for electrically connecting the transparent conductive layer 140 to the grounding pad GP.

The first substrate 110 is a thin film transistor array substrate and includes a display area AA for displaying a predetermined image and a non-display area provided in the periphery of the display area AA as shown in Fig. 4 .

The display region AA includes a plurality of pixels P formed in each pixel region defined by the intersection of the gate line GL and the data line DL.

Each of the plurality of pixels P includes a thin film transistor T connected to the gate line GL and the data line DL, a plurality of pixel electrodes (not shown) connected to the drain electrode of the thin film transistor T And a plurality of common electrodes CE formed in a pixel region corresponding to between the plurality of pixel electrodes PE and supplied with a common voltage Vcom from the outside.

The non-display area is defined as a rim portion of the first substrate 110 so as to correspond to the peripheral portion of the display area AA.

A plurality of pad portions PP electrically connected to the display region AA and a ground contact hole CH are formed in the upper non-display region of the non-display region.

Each of the plurality of pad portions PP includes first through third pad groups PG1, PG2, and PG3, and a ground pad GP. Each of the plurality of pad portions PP is formed at the time of forming the pixel electrode PE of each pixel P. [

The first group of pads PG1 is composed of a plurality of data signal pads PD1 formed in parallel so as to be spaced apart from each other at the edges of the upper non-display area.

Each of the plurality of data signal pads PD1 is connected to each of the data lines DL of the display area AA through a plurality of data link lines (DLL) formed in the upper non-display area. Each of the plurality of data signal pads PD1 serves to supply a data voltage supplied from the outside to each of the data lines DL through each of a plurality of data link lines (DLL).

The data line DL may be formed at the time of forming the data line DL or may be formed at the time of forming the gate line GL and may be formed at the time of forming the data signal pad PD1 and another connection hole And may be electrically connected to each of the data signal pad PD1 and the data line DL through a separate jumper.

The second group of pads PG2 is composed of a plurality of first dummy pads DMP1 arranged at regular intervals on the edge of the upper non-display area so as to be adjacent to one side of the first group of pads PG1.

The third group of pads PG3 is composed of a plurality of second dummy pads DMP2 arranged at regular intervals in the edge portions of the upper non-display region so as to be adjacent to the other side of the first group of pads PG1.

The ground pad GP is formed adjacent to the third group of pads PG3 and electrically connected to the ground path member 150 via a ground link line GLL formed in the upper non-display area. At this time, the ground link line GLL is formed in the upper non-display region of the first substrate 110 together with the gate line GL of the display region AA and the gate electrode of the thin film transistor T. [ The ground pad GP is electrically connected to one side portion of the ground link line GLL through an exposure hole EH exposing one side portion of the ground link line GLL as shown in Fig.

The exposed hole EH is formed by removing the predetermined region of the gate insulating film 112 covering the ground link line GLL and the protective film 114 covering the source / drain electrodes of the thin film transistor T by the etching process, 0.0 > GLL. ≪ / RTI >

The ground contact hole CH exposes a part of the other side of the ground link line GLL formed on the first substrate 110. That is, the ground contact hole CH exposes the other part of the ground link line GLL by removing a predetermined region of the gate insulating film 112 and the protective film 114 by an etching process.

A grounding contact pad (CP) formed together with the grounding pad (GP) may be further formed on the grounding contact hole (CH). The ground contact pad CP is electrically connected to the other part of the ground link line GLL exposed by the ground contact hole CH. In this case, the ground pad GP is electrically connected to the ground contact pad CP via the exposure hole EH and the ground link line GLL.

4, a gate driving circuit 160 and a plurality of gate clock lines (GCL) may be further formed in one non-display area of the non-display area.

The gate driving circuit 160 is formed in one side non-display region adjacent to the left side of the display region AA in conjunction with the formation process of the thin film transistor T of the pixel P and supplies a gate signal to the gate line GL. The gate driving circuit 160 includes a shift register circuit that generates a gate signal in response to a gate control signal such as a gate start pulse and a plurality of gate clock signals supplied from a plurality of gate clock lines GCL .

The plurality of gate clock lines GCL are connected to the second pad group PG2 of the first pad portion among the plurality of pad portions PP through a plurality of gate link lines LOG formed in the upper non-display region.

Each of the gate driving circuit 160 and the plurality of gate clock lines GCL may be formed in the same non-display area on the other of the non-display areas. In this case, the plurality of gate clock lines GCL are connected to the second pad group PG2 of the last pad portion among the plurality of pad portions PP through a plurality of gate link lines LOG formed in the upper non-display region .

2, the first to eighth pad portions PP1 to PP8 are formed of the first to eighth pad portions PP1 to PP8, Each arrangement structure will be described as follows.

The first pad unit PP1 includes the first pad group PG1, the second and third pad groups PG2 and PG3 disposed on both sides of the first pad group PG1, And a ground pad GP disposed on one side of the ground pad PG3.

The second to seventh pad portions PP2 to PP7 are formed of the first pad group PG1, the second and third pad groups PG2 and PG3 disposed on both sides of the first pad group PG1, And a pair of ground pads GP disposed on both sides of the third group of pads PG2 and PG3. At this time, no signal is supplied from the outside to each of the second and third pad groups PG2 and PG3.

The eighth pad portion PP8 includes the first pad group PG1, the second pad group PG2 disposed on one side of the first pad group PG1, and the second pad group PG2 disposed on one side of the second pad group PG1 A ground pad GP and a third pad group PG3 disposed on the other side of the first pad group PG1. At this time, a gate control signal is supplied from the outside to the third group of pads PG3. On the other hand, no signal is supplied from the outside to the second group of pads PG2.

2 and 3, the second substrate 130 is a color filter array substrate, and includes a black matrix layer (not shown) defining a pixel opening region, a color filter layer (not shown) formed in the pixel opening region, An overcoat layer (not shown) covering the color filter layer, and an upper alignment layer (not shown) covering the overcoat layer. At this time, the overcoat layer may be omitted.

The transparent conductive layer 140 is formed on the upper surface (or the exposed surface) of the second substrate 130. The transparent conductive layer 140 serves to prevent the static electricity generated by the electrification of the second substrate 130 from flowing into the liquid crystal layer 120. For this, the transparent conductive layer 140 may be made of a transparent conductive material such as indium tin oxide (ITO), antimony tin oxide (ATO), or ZnO.

The second substrate 130 on which the transparent conductive layer 140 is formed is bonded to the first substrate 110 excluding the upper non-display region of the first substrate 110 by the seal member 125 with the liquid crystal layer 120 interposed therebetween, 110). The liquid crystal layer 120 is formed of an in plane switch mode liquid crystal.

The lower polarizing film 115 is attached to the lower surface of the first substrate 110 and the upper polarizing film 135 is attached to the upper surface of the transparent conductive layer 140. The lower polarizing film 115 polarizes light traveling from the backlight unit (not shown) disposed under the liquid crystal display panel 100 to the first substrate 110. The upper polarizing film 135 transmits the second substrate 130 to polarize the color light emitted to the outside.

The grounding path member 150 serves to electrically connect the transparent conductive layer 140 to the ground pad GP.

The grounding path member 150 according to an embodiment is a conductive paste such as silver or the like and is formed of a conductive paste such that the upper surface of one side of the transparent conductive layer 140 and the ground contact hole CH formed in the first substrate 110 The conductive layer 140 is electrically connected to the ground pad GP through the ground contact hole CH and the ground link line GLL by being dripped (or dotted) between the contact pad CP and the contact pad CP Respectively.

6, the grounding path member 150 according to another embodiment may be formed as a conductive adhesive between the upper surface of one side of the transparent conductive layer 140 and the contact pad CP formed on the first substrate 110 So that the transparent conductive layer 140 is electrically connected to the ground pad GP through the ground contact hole CH and the ground link line GLL. The conductive adhesive may be a conductive tape made of a conductive material such as silver (Ag).

2, the ground path members 150 are formed on both sides of the upper non-display area. However, the present invention is not limited thereto, and the ground path member 150 may be formed between the plurality of pad parts PP have.

In the liquid crystal display panel 100 according to the present invention, the static electricity blocked by the transparent conductive layer 140 formed on the second substrate 130 is separated from the ground path member 150 and the first substrate 110, (PP) of the battery pack. Therefore, since the liquid crystal display panel 100 according to the embodiment of the present invention can completely discharge the static electricity generated on the second substrate 130, it is possible to prevent the electrostatic image quality failure caused by the static electricity.

FIG. 7 is a cross-sectional view schematically showing a liquid crystal display device according to an embodiment of the present invention, and FIG. 8 is a plan view schematically showing the liquid crystal display panel shown in FIG.

7 and 8, a liquid crystal display according to an exemplary embodiment of the present invention includes a liquid crystal display panel 200, a backlight unit 210, a support case 220, a guide panel 230, a front case 240 ), And a panel driver.

The liquid crystal display panel 200 has the same configuration as that of the liquid crystal display panel 100 according to the embodiment of the present invention described above with reference to FIGS. 2 to 6, and a duplicated description thereof will be omitted.

The backlight unit 210 is disposed below the liquid crystal display panel 200 to irradiate the liquid crystal display panel 200 with light. To this end, the backlight unit 210 includes a light guide plate 211, a light source 213, a reflection sheet 215, and an optical member 217.

The light guide plate 211 is formed in a flat plate shape to have a light incidence surface to advance the light incident on the light incidence surface from the light source 213 toward the liquid crystal display panel 200.

The light source 213 is disposed so as to face the light incident surface of the light guide plate 211, and irradiates the light guide plate 211 with light. For this purpose, the light source 213 may include a plurality of light emitting diodes or fluorescent lamps.

The reflective sheet 215 is disposed on the back surface of the light guide plate 211 and reflects the light traveling to the lower surface of the light guide plate 211 to the inside of the light guide plate 211.

The optical member 217 is disposed on the light guide plate 211 to improve the brightness characteristic of light traveling from the light guide plate 211 to the liquid crystal display panel 200 side. To this end, the optical member 217 may be configured to include at least one diffusion sheet and at least one prism sheet.

The support case 220 houses the backlight unit 210 and supports the guide panel 230. The support case 220 is made of a metal material and serves as a rear product cover of the liquid crystal device and serves as a support for discharging static electricity ES generated in the liquid crystal display panel 200.

The guide panel 230 is formed in a rectangular frame shape and is supported by the support case 220 so as to surround the side surface of the support case 220. The guide panel 230 covers the side surface of the liquid crystal display panel 200 and supports the bottom edge of the liquid crystal display panel 200.

The front case 240 is formed in the shape of a square frame so as to have a cross-sectional shape, and is coupled to the side surface of the guide panel 230. The front case 240 covers the top edge portion of the liquid crystal display panel 200 and the side surface of the guide panel 230 to expose only the display region of the liquid crystal display panel 200 to the outside.

The panel driver displays a predetermined image on the liquid crystal display panel 200 and connects the ground pad GP of the liquid crystal display panel 200 to the contact support. To this end, the panel driver includes a plurality of circuit films 250, a printed circuit board 260, a signal transmission member 270, and a control board 280.

The plurality of circuit films 250 are attached to the respective pad portions PP (see FIG. 4) formed on the first substrate 110 of the liquid crystal display panel 200 by a TAB (Tape Automated Bonding) process. Each of the plurality of circuit films 250 includes an input bonding portion 251, an output bonding portion 252, and a first ground wiring 253.

The input bonding portion 251 is composed of a plurality of input bonding electrodes IBE electrically connected to the printed circuit board 260. A digital data signal is supplied from the printed circuit board 260 to the plurality of input bonding electrodes IBE.

The output bonding portion 252 is composed of a plurality of output bonding electrodes OBE electrically connected to the respective data signal pads PD1 of the pad portions PP formed on the first substrate 110. [ The plurality of output bonding electrodes OBE are connected to the data lines PD1 and PD2 of the liquid crystal display panel 200 through the data signal pad PD1 and the data link line DLL of each pad portion PP, (DL).

The first ground wiring 253 is electrically connected to each of the ground pads GP (see FIG. 4) of the respective pad portions PP. The first ground line 253 is electrically connected to the transparent conductive layer 140 formed on the second substrate 130 of the liquid crystal display panel 200 through the ground pad GP, the ground link line GLL, As shown in Fig.

The input bonding portions 251 of the first circuit film and the last circuit film of the plurality of circuit films 250 include input bonding electrodes for a plurality of gate control signals supplied with the gate control signals from the printed circuit board 260 . The output bonding portion 253 of each of the first circuit film and the last circuit film includes a plurality of output bonding electrodes for gate control signals electrically connected to the input bonding electrodes for the plurality of gate control signals through a plurality of internal wirings .

The ground path member 150 formed on the liquid crystal display panel 200 is formed on the non-display area between the adjacent two circuit films 250 so that the first ground wiring 253 Respectively.

The data driving integrated circuit 300 is mounted on each of the plurality of circuit films 250. The data driving integrated circuit 300 converts the digital data signal supplied from the input bonding portion 251 of the circuit film 250 into an analog type data signal and outputs the data signal. The data signal is supplied to the data signal pad PD1 of the pad part PP through the output bonding part 253 of the circuit film 250 so that the data signal is supplied to the corresponding data line DL through the data link line .

The plurality of circuit films 250 on which the data driving integrated circuit 300 is mounted are attached to the pad portions PP of the first substrate 110 and are arranged on the rear surface of the support case 220 along the side surfaces of the guide panel 230. [ . The plurality of circuit films 250 are enclosed by the front case 240.

The printed circuit board 620 is formed of at least one circuit board 250 according to the number of the circuit films 250 and is attached to the input bonding portions 251 of the plurality of circuit films 250 by a TAB process. The printed circuit board 260 includes a second ground wiring 262 electrically connected to the first ground wiring 253 of each circuit film 250 and a second ground wiring 262 electrically connected to each of the plurality of circuit films 250 And is formed to include an internal wiring.

The printed circuit board 260 includes a driving power supply unit (not shown) for generating driving power (for example, driving voltage, gamma voltage, ground power, etc.) necessary for driving the liquid crystal display panel 200 .

7, the printed circuit board 260 is disposed on the rear surface of the support case 220. However, the present invention is not limited thereto. The printed circuit board 260 may be formed to have a relatively small width, 230, respectively.

The signal transmission member 270 transmits various control signals and digital input data, which are electrically connected to the printed circuit board 260 and supplied from the control board 280, to the printed circuit board 260. To this end, the signal transmission member 270 is connected to the internal signal wiring for transmission of various control signals and digital input data, respectively, and a third ground wiring (not shown) electrically connected to the second ground wiring 262 of the printed circuit board 260 (272). The signal transmitting member 270 may be a flexible circuit board, and may be formed of a plurality of printed circuit boards 260.

The control board 280 is electrically connected to the signal transmitting member 270 and electrically connected to an external video card or an external system such as the system body through the user connector 282. [ A control circuit 284 is mounted on the control board 280.

The control circuit 284 outputs a data control signal and a gate control signal for displaying a predetermined image on the liquid crystal display panel 200 according to the image data and the synchronization signal provided from the external system through the user connector 282, And outputs it. At this time, the digital input data and the data control signal are supplied to the data driving integrated circuit 300 through the signal transmission member 270, the printed circuit board 260 and the plurality of circuit films 250. The gate control signal is supplied to the gate drive circuit 160 (see FIG. 4) through the signal transfer member 270 and the printed circuit board 260, the first and last circuit films 250, and the first substrate 110 .

The control board 280 includes a plurality of signal transmission lines for transmitting the data control signal, the gate control signal, and the digital input data to the signal transmission member 270, the third ground wiring 272 of the signal transmission member 270, And a grounding hole 288 for grounding the fourth grounding wiring 286 to the support case 220. The fourth grounding wiring 286 is electrically connected to the second grounding wiring 286, The control board 280 having such a configuration is fixed to the back surface of the support case 220 by a fastening member 289 inserted into the ground hole 288 and fastened to the support case 220. The grounding hole 288 is electrically connected to the rear surface of the support case 220 by the engagement of the coupling member 289 and the support case 220 so that the fourth grounding wiring 286 is connected to the support case 220 Ground. Therefore, the support case 220 is connected to the grounding hole 288, the fourth grounding wiring 286, the third grounding wiring 272, the second grounding wiring 262, the first grounding wiring 253, the grounding pad GP The grounding path member GLL and the grounding path member 150 to the transparent conductive layer 140 formed on the second substrate 130 of the liquid crystal display panel 110. [

In the above description of the liquid crystal display device according to the embodiment of the present invention, the ground hole 288 of the control board 280 is electrically connected to the support case 220. However, 10, a ground hole 268 is formed on one side of the printed circuit board 260 and a ground hole 268 of the printed circuit board 260 is connected to the support case 220 As shown in Fig. In this case, the support case 220 is connected to the grounding hole 269 of the printed circuit board 260 and the second ground wiring 262, the first ground wiring 253 of the circuit film 250, And is electrically connected to the transparent conductive layer 140 of the second substrate 130 through the ground pad GP of the first substrate 130, the ground link line GLL, As a result, the liquid crystal display according to the exemplary embodiment of the present invention may be mounted on the printed circuit board 260 or the control board 280 according to the position of the printed circuit board 260, The layer 140 can be grounded to the support case 220.

The liquid crystal display device according to the present invention can prevent the static electricity generated in the liquid crystal display panel 200 from passing through the pad portion PP of the liquid crystal display panel 200, the circuit film 250, the printed circuit board 260, The electrostatic image quality defect caused by the static electricity ES can be prevented by completely discharging the support case 220 through the transfer member 270 and the control board 280. [ Furthermore, since the liquid crystal display according to the embodiment of the present invention does not discharge the static electricity generated in the liquid crystal display panel 200 to the front case 240, the conventional problems do not occur.

11 is a view schematically showing a liquid crystal display device according to another embodiment of the present invention. The ground path member 150 is formed of a conductive paste, and the ground path member 150 is electrically connected to the front case 240 The liquid crystal display device is constructed in the same manner as the above-described liquid crystal display device. The liquid crystal display according to another embodiment of the present invention is configured to connect the grounding path member 150 to the ground link line GLL by forming the grounding path member 150 made of conductive paste at a relatively high height, 240, it is possible to discharge the static electricity ES more quickly.

The liquid crystal display device according to the embodiments of the present invention may be applied to a liquid crystal display device having a touch screen or a liquid crystal display device having a touch screen built in the liquid crystal display panel, It is possible to prevent the malfunction of the touch panel and the electrostatic image quality caused by the static electricity generated by the user touching the panel 10.

It will be understood by those skilled in the art that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100, 200: liquid crystal display panel 110: first substrate
120: liquid crystal layer 130: second substrate
140: transparent conductive layer 150: grounding path member
210: backlight unit 220: support case
230: Guide panel 240: Front case
250: circuit film 260: printed circuit board
270: signal transmission member 280: control board

Claims (10)

An insulating layer covering the ground link line, a ground contact hole exposing a portion of the ground link line, an exposure hole exposing a tip of the ground link line, a ground connected to the ground link line via the ground contact hole, A ground pad connected to the ground line via the exposure hole, and a pad portion having a plurality of signal pads;
A second substrate bonded to the first substrate with a liquid crystal layer interposed therebetween;
A transparent conductive layer formed on an upper surface of the second substrate; And
And a grounding path member electrically connecting the transparent conductive layer to the grounding pad,
Wherein the grounding path member electrically connects the transparent conductive layer to the ground pad through the grounding link line by connecting the upper surface of one side edge of the transparent conductive layer to the grounding contact pad. delete The method according to claim 1,
Wherein the grounding path member is a conductive paste that is dropped and cured between the transparent conductive layer and the contact hole. The method according to claim 1,
And the grounding path member is a conductive adhesive member attached between the transparent conductive layer and the contact hole. A liquid crystal display panel according to claim 1;
A circuit film formed to include a first ground wiring electrically connected to the ground pad and a plurality of bonding electrodes electrically connected to each of the plurality of signal pads;
A driving integrated circuit mounted on the circuit film and supplying a data signal to the plurality of signal pads; And
And a printed circuit board formed to include a second ground wiring electrically connecting the first ground wiring and the contact support and connected to the circuit film. 6. The method of claim 5,
A signal transmission member formed to include a third ground wiring electrically connected to the second ground wiring and connected to the printed circuit board; And
And a control board electrically connecting the third ground wiring to the contact support. 6. The method of claim 5,
A backlight unit for emitting light to the liquid crystal display panel;
A support case for housing the backlight unit; And
And a guide panel supported by the support case to support the liquid crystal display panel,
And the contact support is the support case. A liquid crystal display panel according to claim 1;
A circuit film formed to include a first ground wiring electrically connected to the ground pad and a plurality of bonding electrodes electrically connected to each of the plurality of signal pads;
A driving integrated circuit mounted on the circuit film and supplying a data signal to the plurality of signal pads;
A printed circuit board formed to include a second ground wiring electrically connecting the first ground wiring and the contact support and connected to the circuit film; And
And a front case which is disposed so as to cover an upper edge portion of the liquid crystal display panel and is electrically connected to a ground path member formed on the liquid crystal display panel. 9. The method of claim 8,
A signal transmission member formed to include a third ground wiring electrically connected to the second ground wiring and connected to the printed circuit board; And
And a control board electrically connecting the third ground wiring to the contact support. 10. The method of claim 9,
A backlight unit for emitting light to the liquid crystal display panel;
A support case for housing the backlight unit; And
And a guide panel supported by the support case to support the liquid crystal display panel,
And the contact support is the support case.

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