KR20040083684A - Liquid crystal display - Google Patents

Abstract

PURPOSE: An LCD is provided to reduce the parasitic capacitance between a gate driving circuit and common electrodes by providing an organic insulating film and a cell gap keeping element in serial on a gate driving area of a lower substrate, and by providing a conductive ball between the gate driving circuit part and the common electrodes for keeping a voltage thereof. CONSTITUTION: An LCD includes upper and lower substrates(200,100), and an LC layer. The lower substrate has a display area(DA) and a driving area(DRA) around the display part for providing driving signals to the display area. First cell gap keeping elements(250a) are formed on common electrodes(240) of the upper substrate separates the upper and lower substrates from each other by a predetermined distance. An insulating film(130) covers a gate driving circuit(160) formed on the driving area entirely and is provided with a second cell gap keeping element(250b) for reducing a parasitic capacitance between the common electrode and the gate driving circuit.

Description

Liquid Crystal Display {LIQUID CRYSTAL DISPLAY}

The present invention relates to a liquid crystal display device, and more particularly, to a liquid crystal display device capable of improving display characteristics.

1 is a cross-sectional view illustrating a general liquid crystal display, and FIG. 2 is an output waveform diagram of the gate driver shown in FIG. 1. However, in the graph shown in FIG. 2, the x axis represents time and the y axis represents voltage.

Referring to FIG. 1, a general liquid crystal display device 40 includes a lower substrate 10, an upper substrate 20, and a liquid crystal layer 30 interposed between the upper substrate 20 and the lower substrate 10. Is done. The liquid crystal display 40 displays an image while changing an arrangement angle of the liquid crystal layer 30 by an electric field formed between the upper substrate 20 and the lower substrate 10 by a signal from the outside. do.

The lower substrate 10 includes a display area DA and a peripheral area PA adjacent to the display area DA. The display area DA includes a plurality of pixels in a matrix form. Each of the plurality of pixels includes a gate line, a data line, a thin film transistor (hereinafter, referred to as a TFT) 11 connected to the gate line and the data line, and a pixel electrode 12 coupled to the TFT 11. .

In the peripheral area PA, a gate driving circuit 16 for applying a driving voltage to the gate line is formed by the TFT process. As such, by integrating the gate driving circuit 16 on the lower substrate 10, the number, volume, and size of the assembly process of the liquid crystal display device 40 may be reduced.

The upper substrate 20 includes a common electrode 24 facing the pixel electrode 20 with the liquid crystal layer 30 therebetween. The cell gap holding member 25 is provided on the common electrode 24 to maintain the cell gap of the liquid crystal display 40 corresponding to the display area DA.

Since the common electrode 24 also faces the gate driving circuit 16 with the liquid crystal layer 30 interposed therebetween, the parasitic capacitance between the gate driving circuit 16 and the common electrode 24 is increased. C) is generated.

In FIG. 2, A1 represents a normal waveform and A2 represents a waveform distorted by the parasitic capacitance C. In FIG. As shown in FIG. 2, the highest voltage in the distorted waveform A2 was about 5V lower than the highest voltage in the normal waveform A1.

As a result, the parasitic capacitance C distorts or delays the signal output from the gate driving circuit 16, thereby lowering the display characteristics of the liquid crystal display 40. FIG.

Accordingly, an object of the present invention is to provide a liquid crystal display device for improving display characteristics.

1 is a cross-sectional view showing a general liquid crystal display device.

FIG. 2 is an output waveform diagram of the gate driver shown in FIG. 1.

3 is an output waveform diagram when there is no liquid crystal in the gate driver.

4 to 7 are graphs sequentially illustrating composite capacitances of various layers existing between an upper substrate and a lower substrate of a liquid crystal display under various conditions.

8 is a cross-sectional view illustrating a transmissive liquid crystal display device according to an exemplary embodiment of the present invention.

9 is a cross-sectional view illustrating a transmissive liquid crystal display device according to another feature of the present invention.

10 is a cross-sectional view illustrating a reflection-transmissive liquid crystal display device according to an aspect of the present invention.

11 is a cross-sectional view illustrating a reflection-transmissive liquid crystal display device according to another feature of the present invention.

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

100: lower substrate 120: transparent electrode

130a and 130b: organic insulating layer 160: gate driving circuit

190: reflective electrode 200: upper substrate

300: liquid crystal layer 260: sealant

600: transmissive liquid crystal display DRA: drive area

DA: Display Area PA: Peripheral Area

SLA: Sealed Line Area

The liquid crystal display according to the present invention for achieving the above object of the present invention includes a lower substrate, an upper substrate, a first cell gap holding member, an insulating film and a liquid crystal layer.

The lower substrate includes a display unit for displaying an image and a driving unit provided around the display unit to provide a driving signal to the display unit, and the upper substrate is formed of a color filter and a common electrode provided on the color filter.

Here, the first cell gap holding member spaces the lower substrate and the upper substrate at a predetermined distance, and the insulating film covers the driving part as a whole.

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

3 is an output waveform diagram when there is no liquid crystal in the gate driver.

In FIG. 3, B1 is a normal waveform and B2 is an output waveform diagram when there is no liquid crystal in the gate driver. As shown in FIG. 3, it can be seen that the waveform B2 appears in an ideal form with almost no error with the normal waveform B1.

As a result, the parasitic capacitance is reduced when there is no liquid crystal compared to the case where the liquid crystal is present in the gate driver, so that the signal output from the gate driving circuit is not distorted or delayed, so that display characteristics of the liquid crystal display are not deteriorated. .

4 to 7 are graphs sequentially illustrating composite capacitances of various layers existing between an upper substrate and a lower substrate of a liquid crystal display under various conditions.

The horizontal axis of the graph represents a case where layers are sequentially synthesized, and the vertical axis of the graph represents a value of capacitance. Where E represents the permittivity of air.

Referring to FIG. 4, the A graph is a graph sequentially showing composite capacitances of various layers existing between the upper substrate and the lower substrate when the thickness of the organic film is 2 μm, and the B graph is a case where the thickness of the organic film is 3.6 μm. It is a graph showing the synthetic capacitance sequentially.

Point a represents a composite capacitance in which the gate insulating layer and a silicon layer are stacked in series, and point b represents a composite capacitance in which a passivation layer of SiN _x material is stacked in series on the layer at point a. . Points c and c 'represent synthetic capacitances in which organic films are stacked in series on the layer b, d represents capacitance of the liquid crystal, and e and e' represent capacitance between the gate driving circuit portion and the common electrode.

On the other hand, Figure 5 shows the combined capacitance when the temperature is reduced compared to the case of FIG.

Referring to FIG. 5, the C graph is a graph sequentially showing the composite capacitances of various layers existing between the upper substrate and the lower substrate when the thickness of the organic film is 2 μm, and the D graph is a case where the thickness of the organic film is 3.6 μm. It is a graph showing the synthetic capacitance sequentially.

The point f represents a composite capacitance in which the gate insulating layer and the silicon layer are stacked in series, and the g point represents a composite capacitance in which a passivation layer of SiN _x material is stacked in series on the layer at the point f. The points h and h 'represent the synthetic capacitances in which organic films are laminated in series on the layer g, the point i represents the capacitance of the liquid crystal, and j and j' represent the capacitance between the gate driving circuit portion and the common electrode.

As a result, in FIG. 5, where the temperature is lower than that in FIG. 4, capacitance between the gate driving circuit unit and the common electrode increases, thereby causing a reliability problem of the gate circuit unit. In addition, it can be seen that the organic film must be laminated on the gate driving circuit because the value of the synthesized capacitance becomes smaller when the thickness of the organic film is 3 µm than in the case where the thickness of the organic film is 2 µm.

Referring to FIG. 6, graph E sequentially illustrates the combined capacitance of layers stacked in series when the organic film is removed and only the spacer is interposed.

The point k represents a composite capacitance in which the gate insulating layer and the silicon layer are stacked in series, and the point l represents a composite capacitance in which a passivation layer of SiN _x material is stacked in series in the layer at the k point. Point m represents the capacitance of the liquid crystal, and n and n 'represent the capacitance between the gate driving circuit portion and the common electrode.

Referring to FIG. 7, the graph F sequentially shows the synthesized capacitance of layers stacked in series when both the organic film and the spacer are present.

Point o represents a composite capacitance in which a gate insulating layer and a silicon layer are stacked in series, and point p represents a composite capacitance in which a passivation layer of SiN _x material is stacked in series on the layer at point o. Points q and q 'represent the synthetic capacitance in which the organic film is stacked in series on the layer of point p, the point r represents the capacitance of the liquid crystal, and s and s' represent the capacitance between the gate driving circuit portion and the common electrode.

In summary, it can be seen that the capacitance between the gate driving circuit unit and the common electrode is the smallest with the spacer while leaving the organic layer between the gate driving circuit unit and the common electrode.

8 is a cross-sectional view illustrating a transmissive liquid crystal display device according to an exemplary embodiment of the present invention.

Referring to FIG. 8, a transmissive liquid crystal display device 400 according to an exemplary embodiment of the present invention may include a lower substrate 100, an upper substrate 200 facing the lower substrate 100, and the lower substrate 100. The liquid crystal layer 300 is interposed between the upper substrate 200 and the upper substrate 200.

The lower substrate 100 includes a display area DA and a peripheral area PA adjacent to the display area DA. The display area DA includes a plurality of pixels in a matrix form. Each of the plurality of pixels includes a gate line GL, a data line DL, a thin film transistor (TFT) 110 connected to the gate line GL, and a data line DL. And a pixel electrode 120 coupled to 110.

In the peripheral area PA, a gate driving circuit 160 for applying a driving voltage to the gate line is formed by the TFT process. As such, by integrating the gate driving circuit 160 on the lower substrate 100, the assembly process number, volume, and size of the liquid crystal display device 400 may be reduced.

In order to connect only the drain electrode of the TFT 110 to the pixel electrode 120, a first organic insulating layer 130a is interposed between the TFT 110 and the pixel electrode 120. The first organic insulating layer 130a is provided with a contact hole 131 for exposing the drain electrode. Thus, the pixel electrode 120 is electrically connected to the drain electrode through the contact hole 131.

In the lower substrate 100, an area in which the TFT 110, the data line DL, and the gate line GL are provided is defined as an invalid display area in which an image is not displayed. In addition, an area in which the pixel electrode 120 is provided is defined as an area in which an image is displayed as an effective display area.

A gate driving circuit 160 is provided in the lower substrate 100 corresponding to the driving region DRA. The gate driving circuit 160 is connected to one end of the gate line GL disposed in the display area DA through a connection line 165. Thus, the gate driving circuit 160 provides a gate driving signal to the gate line GL. The gate driving circuit 160 is formed through the same process as that of the TFT 110 provided in the display area DA and integrated on the lower substrate 100.

Although not shown in the drawings, a data driving circuit (not shown) is provided in the first region and is connected to one end of the data line DL to provide an image signal to the data line DL. The data driving circuit is provided in a chip form, and when the lower substrate 100 is completed, the data driving circuit is assembled on the lower substrate 100.

The upper substrate 200 is provided to correspond to the lower substrate 100 as a whole. The upper substrate 200 is provided to correspond to the light blocking film 210 and the effective display area of the lower substrate 200 provided in correspondence with the ineffective display area and the peripheral area PA of the lower substrate 100, And a color filter 220 made of RGB color pixels.

The light blocking film 210 prevents the TFT 110, the data line DL, and the gate line GL from being projected onto the screen of the transmissive liquid crystal display 400. In addition, the light blocking film 210 is provided to correspond to the driving region and the seal line regions DRA and SLA of the lower substrate 100 so that the gate driving circuit 160 and the connection wiring 165 are the transmissive liquid crystal display device. The projection on the screen of 400 is prevented.

The color filter 220 is provided on the upper substrate 200 such that each of the R.G.B color pixels corresponds to each of the plurality of pixels provided in the lower substrate 100. In addition, each of the R.G.B color pixels overlaps the light blocking film 210.

The planarization film is formed on the color filter 220 and the light shielding film 210 to protect the color filter 220 and the light shielding film 210, and to reduce the level difference generated between the light shielding film 210 and the color filter 220. 230 is provided. The common electrode 240 made of a transparent conductive material is stacked on the planarization layer 230 to have a uniform thickness. The common electrode is formed not only in the display area DA but also in the seal line area SLA and the driving area DRA.

A first cell gap holding member 250a is provided on the common electrode 240 to separate the lower substrate 100 from the upper substrate 200. Specifically, the first cell gap holding member 250a is provided in the display area DA to maintain the cell gap of the transmissive liquid crystal display device 400 by its height.

Meanwhile, the transmissive liquid crystal display device 400 includes a sealant 260 interposed between the lower substrate 100 and the upper substrate 200 to bond the two substrates 100 and 200. The sealant 260 is provided in the seal line area SLA.

When the lower substrate 100 and the upper substrate 200 are completed, the lower substrate 100 and the upper substrate 200 are firmly coupled by the sealant 260. When the lower substrate 100 and the upper substrate 200 are combined, the common electrode 240 not only faces the pixel electrode 120 in the display area DA, but also the gate driving circuit 160. ) Also face each other in the peripheral area PA.

Therefore, the common electrode 240 and the gate driving circuit formed to correspond to the driving region DRA by covering the second organic insulating layer 130b on the driving region DRA, that is, the gate driving circuit 160. The second organic insulating layer 130b and the liquid crystal layer 300 are interposed in series with the 160.

The second organic insulating layer 130b preferably has a relative dielectric constant of 1.5 to 5.0 and a thickness of 0.4 to 5 μm.

In addition, an insulating film made of an inorganic material may be provided instead of the second organic insulating film 130b, but the thickness thereof is preferably smaller than 2 μm.

The parasitic capacitance generated between the common electrode 240 and the gate driving circuit 160 is proportional to the dielectric constant of the dielectric interposed between the common electrode 240 and the gate driving circuit 160. The second organic insulating layer 130b made of a photosensitive acrylic resin having a lower dielectric constant between the common electrode 240 and the gate driving circuit 160 has a lower dielectric constant than that of the liquid crystal layer 300 alone. The parasitic capacitance generated between the common electrode 240 and the gate driving circuit 160 may be reduced by being provided in series.

In addition, a second cell gap holding member 250b is provided in a region corresponding to the second organic insulating layer 130b. The second cell gap holding member 250b may be formed of the same photosensitive acrylic resin as the second organic insulating layer 130b, and preferably, the second cell gap holding member 250b is provided on the upper substrate 200. .

Accordingly, a second cell gap holding member 250b formed of a photosensitive acrylic resin having a lower dielectric constant than that of the liquid crystal layer 300 is disposed on the second organic insulating layer 130b in series with the second organic insulating layer 130b. Parasitic capacitance generated between the 240 and the gate driving circuit 160 may be reduced.

In FIG. 8, the upper substrate 200 is provided to correspond to the lower substrate 100 as a whole. However, the upper substrate 200 may be provided to partially correspond to the lower substrate 100.

9 is a cross-sectional view illustrating a transmissive liquid crystal display device according to another feature of the present invention. In FIG. 9, the same reference numerals are given to the same components as those illustrated in FIG. 8, and description thereof will be omitted.

Referring to FIG. 9, a transmissive liquid crystal display 500 according to a second exemplary embodiment of the present invention combines a lower substrate 100, an upper substrate 200, the lower substrate 100, and the upper substrate 200. And a liquid crystal layer 300 interposed between the sealant 260 and the lower substrate 100 and the upper substrate 200.

The lower substrate 100 includes a display area DA in which a plurality of pixels are provided in a matrix form and a peripheral area PA positioned around the display area DA. The peripheral area PA is formed between the driving area DRA having the gate driving circuit 160 and the display area DA and the driving area DRA, and the seal line having the sealant 260 disposed therein. It is divided into SLAs.

On the other hand, the upper substrate 200 is provided to correspond to the lower substrate 100 as a whole. The upper substrate 200 is provided to correspond to the light blocking film 210 and the effective display area of the lower substrate 200 provided in correspondence with the ineffective display area and the peripheral area PA of the lower substrate 100, And a color filter 220 made of RGB color pixels.

When the lower substrate 100 and the upper substrate 200 are completed, the sealant 350 is interposed between the lower substrate 100 and the upper substrate 200 and the lower substrate 100. The upper substrate 200 is firmly coupled.

When the lower substrate 100 and the upper substrate 200 are combined, the common electrode 240 not only faces the pixel electrode 120 in the display area DA, but also the gate driving circuit 160. ) Also face each other in the peripheral area PA.

Therefore, the second organic insulating layer 130b is covered on the driving region DRA, that is, the gate driving circuit 160. In addition, a first electrode 270 insulated from the common electrode 240 is provided in a region corresponding to the driving unit DRA on the upper substrate 200, and the pixel electrode is disposed on the second organic insulating layer 130b. A second electrode 330 insulated from the 120 is provided.

By having a conductive ball 350 connecting the first electrode 270 and the second electrode 330, the first electrode 270 and the second electrode 330 are shorted and the upper substrate 200 The same voltage is applied to the portion corresponding to the driving unit DRA of the lower substrate 100 and the driving unit DRA of the lower substrate 100 to reduce the parasitic capacitance between the first electrode 270 and the gate driving circuit 160. You can.

10 is a cross-sectional view illustrating a reflection-transmissive liquid crystal display device according to an aspect of the present invention.

Referring to FIG. 10, the reflective-transmissive liquid crystal display 600 according to the present invention has a sealant for combining the lower substrate 100, the upper substrate 200, the lower substrate 100, and the upper substrate 200. 260 and the liquid crystal layer 300 interposed between the lower substrate 100 and the upper substrate 200.

The lower substrate 100 may include a display area DA for displaying an image, a driving area DRA for driving the display area DA around the display area DA, and a display area DA. The driving area DRA is disposed between the display area DA and the driving area DRA, and the sealant 260 is a seal line area SLA.

The display area DAA of the lower substrate 100 includes a TFT 110, a first organic insulating layer 130a, a transparent electrode 120 and a reflective electrode 140 connected to the TFT 110. In detail, the TFT 110 including the gate electrode 111, the source electrode 113, and the drain electrode 112 is formed in the display area DA. A contact hole for exposing the drain electrode 112 is formed in the first organic insulating layer 130a.

Next, a transparent electrode 120 is provided on the first organic insulating layer 130a, and the transparent electrode 120 is electrically connected to the drain electrode 112 through the contact hole. Therefore, the transparent electrode 120 receives a signal applied to the drain electrode 112 of the TFT.

The first organic insulating layer 130a covers a portion where the drain electrode and the transmission electrode contact each other. In addition, the reflective electrode 140 is formed with a transmission window for exposing the transparent electrode 120.

Therefore, the liquid crystal display 600 operates in a reflection mode in which light incident through the upper substrate is reflected through the reflective electrode to display an image. In addition, it operates in a transmission mode in which light incident from a light source unit (not shown) disposed on the rear surface of the TFT substrate is transmitted through the transmission window to display an image.

In this case, the reflective electrode 140 is formed to have an uneven structure to increase the reflection amount of the reflective electrode 140 and to improve the viewing angle of the reflective-transmissive liquid crystal display device 600. Since the reflective electrode 140 is stacked on the first organic insulating layer 130a with a uniform thickness, the reflective electrode 140 is determined by the surface structure of the first organic insulating layer 130a. Therefore, a plurality of irregularities are formed on the surface of the first organic insulating layer 130a so that the reflective electrode has an uneven structure.

The upper substrate 200 is provided to correspond to the lower substrate 100 as a whole. The upper substrate 200 is provided to correspond to the light blocking film 210 and the effective display area of the lower substrate 200 provided in correspondence with the ineffective display area and the peripheral area PA of the lower substrate 100, And a color filter 220 made of RGB color pixels.

The planarization film is formed on the color filter 220 and the light shielding film 210 to protect the color filter 220 and the light shielding film 210, and to reduce the level difference generated between the light shielding film 210 and the color filter 220. 230 is provided. The common electrode 240 made of a transparent conductive material is stacked on the planarization layer 230 to have a uniform thickness. The common electrode is formed not only in the display area DA but also in the seal line area SLA and the driving area DRA.

A first cell gap holding member 250a is provided on the common electrode 240 to separate the lower substrate 100 from the upper substrate 200. In detail, the first cell gap holding member 250a is provided in the display area DA to maintain the cell gap of the transmissive liquid crystal display 600 by its height.

When the lower substrate 100 and the upper substrate 200 are completed, the lower substrate 100 and the upper substrate 200 are firmly coupled by the sealant 260. When the lower substrate 100 and the upper substrate 200 are combined, the common electrode 240 not only faces the pixel electrode 120 in the display area DA, but also the gate driving circuit 160. ) Also face each other in the peripheral area PA.

Therefore, the common electrode 240 and the gate driving circuit formed to correspond to the driving region DRA by covering the second organic insulating layer 130b on the driving region DRA, that is, the gate driving circuit 160. The second organic insulating layer 130b and the liquid crystal layer 300 are interposed in series with the 160.

The second organic insulating layer 130b preferably has a relative dielectric constant of 1.5 to 5.0 and a thickness of 0.4 to 5 μm. Here, the relative dielectric constant represents the ratio with the dielectric constant of the vacuum.

In addition, an insulating film made of an inorganic material may be provided instead of the second organic insulating film 130b, but the thickness thereof is preferably smaller than 2 μm.

The parasitic capacitance generated between the common electrode 240 and the gate driving circuit 160 is proportional to the dielectric constant of the dielectric interposed between the common electrode 240 and the gate driving circuit 160. The second organic insulating layer 130b made of a photosensitive acrylic resin having a lower dielectric constant between the common electrode 240 and the gate driving circuit 160 has a lower dielectric constant than that of the liquid crystal layer 300 alone. The parasitic capacitance generated between the common electrode 240 and the gate driving circuit 160 may be reduced by being provided in series.

In addition, a second cell gap holding member 250b is provided in a region corresponding to the second organic insulating layer 130b. The second cell gap holding member 250b may be formed of the same photosensitive acrylic resin as the second organic insulating layer 130b, and preferably, the second cell gap holding member 250b is provided on the upper substrate 200. .

Accordingly, a second cell gap holding member 250b formed of a photosensitive acrylic resin having a lower dielectric constant than that of the liquid crystal layer 300 is disposed on the second organic insulating layer 130b in series with the second organic insulating layer 130b. Parasitic capacitance generated between the 240 and the gate driving circuit 160 may be reduced.

11 is a cross-sectional view illustrating a reflection-transmissive liquid crystal display device according to another feature of the present invention. In FIG. 11, the same reference numerals are given to the same components as those illustrated in FIG. 8, and description thereof will be omitted.

Referring to FIG. 11, referring to FIG. 10, the reflective-transmissive liquid crystal display 700 according to the present invention includes a lower substrate 100, an upper substrate 200, the lower substrate 100, and the upper substrate 200. ) And a liquid crystal layer 300 interposed between the sealant 260 and the lower substrate 100 and the upper substrate 200.

The lower substrate 100 includes a display area DA in which a plurality of pixels are provided in a matrix form and a peripheral area PA positioned around the display area DA. The peripheral area PA is formed between the driving area DRA having the gate driving circuit 160 and the display area DA and the driving area DRA, and the seal line having the sealant 260 disposed therein. It is divided into SLAs.

On the other hand, the upper substrate 200 is provided to correspond to the lower substrate 100 as a whole. The upper substrate 200 is provided to correspond to the light blocking film 210 and the effective display area of the lower substrate 200 provided in correspondence with the ineffective display area and the peripheral area PA of the lower substrate 100, And a color filter 220 made of RGB color pixels.

When the lower substrate 100 and the upper substrate 200 are completed, the sealant 350 is interposed between the lower substrate 100 and the upper substrate 200 and the lower substrate 100. The upper substrate 200 is firmly coupled.

When the lower substrate 100 and the upper substrate 200 are combined, the common electrode 240 not only faces the pixel electrodes 120 and 140 in the display area DA, but also the gate driving circuit. 160 may also face each other in the peripheral area PA.

Therefore, the second organic insulating layer 130b is covered on the driving region DRA, that is, the gate driving circuit 160. In addition, a first electrode 270 insulated from the common electrode 240 is provided in a region corresponding to the driving unit DRA on the upper substrate 200, and the pixel electrode is disposed on the second organic insulating layer 130b. Second electrodes 330 insulated from the electrodes 120 and 140 are provided.

By having a conductive ball 350 connecting the first electrode 270 and the second electrode 330, the first electrode 270 and the second electrode 330 are shorted and the upper substrate 200 The same voltage is applied to the portion corresponding to the driving unit DRA of the lower substrate 100 and the driving unit DRA of the lower substrate 100 to reduce the parasitic capacitance between the first electrode 270 and the gate driving circuit 160. You can.

According to the liquid crystal display device, the lower substrate has an organic insulating film having a lower dielectric constant than the liquid crystal layer and a cell gap holding member in series on the gate driving region, thereby reducing the generation of parasitic capacitance between the gate driving circuit and the common electrode. You can.

In addition, since a conductive ball is provided between the gate driving circuit unit and the common electrode to make the voltage between the gate driving circuit unit and the common electrode the same, parasitic capacitance can be prevented from occurring.

Therefore, by suppressing generation of the parasitic capacitance, malfunction of the gate driving circuit can be prevented, thereby improving display characteristics of the liquid crystal display device.

Although described with reference to the embodiments above, those skilled in the art will understand that the present invention can be variously modified and changed without departing from the spirit and scope of the invention as set forth in the claims below. Could be.

Claims (11)

A lower substrate having a display unit for displaying an image and a driving unit provided around the display unit to provide a driving signal to the display unit; An upper substrate comprising a color filter and a common electrode provided on the color filter; A first cell gap maintaining member spaced apart from the lower substrate by a predetermined distance; An insulating film covering the driving part as a whole; And And a liquid crystal layer interposed between the lower substrate and the upper substrate. The liquid crystal display of claim 1, further comprising a second cell gap holding member provided on the upper substrate to correspond to a region where the insulating layer is disposed. The method of claim 1, wherein the lower substrate, Gate lines; A data line crossing the gate line; A switching element connected to the gate line and the data line; And And a pixel electrode coupled to the switching element. The liquid crystal display of claim 3, wherein the driving unit is connected to one end of the gate line to sequentially apply the driving signal to the gate line. The liquid crystal display device of claim 4, further comprising a first electrode provided in an area corresponding to the driving part on the upper substrate and insulated from the common electrode. The liquid crystal display device of claim 5, further comprising a second electrode on the insulating layer and insulated from the pixel electrode. 7. The liquid crystal display device of claim 6, further comprising a conductor connecting the first electrode and the second electrode. The liquid crystal display device according to claim 7, wherein the conductor is provided in an area corresponding to the driving part. The liquid crystal display device according to claim 1, wherein the insulating film is made of an organic material and the relative dielectric constant of the organic material is 1.5 to 5.0. The liquid crystal display device according to claim 2, wherein the thickness of the insulating film is 0.4 to 5 mu m. The liquid crystal display device of claim 1, wherein the insulating film is made of an inorganic material, and the thickness of the insulating film is smaller than 2 μm.