KR102132631B1 - Liquid crystal display device with a built-in touch screen - Google Patents

Abstract

A liquid crystal display device having a touch screen according to the present invention includes a color filter layer having a touch screen on a substrate, and an active layer, a gate electrode, a source electrode, a drain electrode, a pixel electrode, and a common electrode while being formed on the color filter layer. And a thin film transistor layer including the color filter layer, the black matrix formed on the substrate, the touch line formed on the black matrix, the black matrix and the bridge formed on the touch line, and a portion of the bridge to be exposed. A touch insulating film formed on a bridge, a plurality of first touch electrodes formed in a first direction on the touch insulating film, a plurality of second touch electrodes formed in a second direction while being spaced apart from the first touch electrode on the touch insulating film, and the plurality of Characterized in that it comprises an overcoat formed on the first touch electrode and the plurality of second touch electrodes, a narrow bezel can be implemented and the manufacturing cost can be reduced by reducing the number of mask processes.

Description

Liquid crystal display with built-in touch screen {LIQUID CRYSTAL DISPLAY DEVICE WITH A BUILT-IN TOUCH SCREEN}

The present invention relates to a flat panel display device, and more particularly, to a liquid crystal display device with a built-in touch screen capable of reducing the panel thickness through the internalization of the touch function.

With the development of various portable electronic devices such as mobile communication terminals and notebook computers, the demand for a flat panel display device that can be applied thereto is gradually increasing.

As a flat panel display device, a liquid crystal display device, a plasma display panel, a field emission display device, and a light emitting diode display device are actively researched. Is becoming.

Among these flat panel display devices, liquid crystal display devices are expanding in application fields with advantages of mass production technology, ease of driving means, high image quality, and large screen realization.

Recently, as an input device of a liquid crystal display device, a touch screen has been applied that replaces a conventional input device such as a mouse or keyboard, and allows a user to directly input information on the screen using a finger or a pen. The application of the touch screen is expanding due to the advantage that anyone can easily operate it.

According to the structure in which the touch screen is combined with the liquid crystal panel, the in-cell method is fired in the cell of the liquid crystal panel, the on-cell method formed on the top of the liquid crystal panel, and the add-on method in which the touch screen is coupled to the outside of the liquid crystal panel. Can be distinguished.

1 is a cross-sectional view schematically showing a liquid crystal display according to a prior art in which a touch panel is applied in an add-on method.

Referring to FIG. 1, the touch panel 20 is disposed on the liquid crystal panel 10 to form a liquid crystal display device in which the touch panel is applied in an add-on manner.

The liquid crystal panel 10 includes a lower substrate 12 (transistor substrate) and an upper substrate 16 (color filter substrate) adhered with the liquid crystal layer 14 interposed therebetween.

The liquid crystal panel 10 displays liquid crystal according to a data voltage according to an image signal, and displays images by controlling light transmittance of a plurality of pixels through the behavior of the liquid crystal.

The touch panel 20 includes a substrate 21, a black matrix 22, a touch line 23, a bridge 24, a touch insulating film 25, a sensing electrode 26, a driving electrode 27, and a touch It comprises a protective film 28.

A black matrix 22 formed on the substrate 21 is formed, and touch lines 23 are formed on both sides of the black matrix 22.

A bridge 24 is formed on the touch line 23 and the black matrix 22.

The bridge 24 connects two driving electrodes 26. That is, the same driving pulse is simultaneously supplied to the two driving electrodes 26 connected through the bridge 24.

A touch insulating film 25 is formed on the substrate 21 including the bridge 24.

The touch insulating layer 25 is patterned so that the sensing electrode 26 and the driving electrode 27 are not electrically connected to each other.

The sensing electrode 26 and the driving electrode 27 are spaced apart from each other on the touch insulating layer 25 to be orthogonal.

The touch panel 20 detects the touch position TS using the change in the capacitance Ctc according to the user's touch through the sensing electrode 26 and the driving electrode 27.

The touch protection layer 28 is formed on the substrate 21 including the sensing electrode 26 and the driving electrode 27.

2A to 2F are schematic manufacturing process diagrams of a touch panel according to the prior art.

2A to 2F, the black matrix 22 is patterned on the substrate 21 through the first mask process. Next, a touch line 23 is patterned on both sides of the black matrix 22 through a second mask process. Next, a bridge 24 is patterned on the touch line 23 and the black matrix 22 through a third mask process. Next, a touch insulating layer 25 is patterned on the substrate 21 including the bridge 24 through a fourth mask process. Next, a sensing electrode 26 and a driving electrode 27 are simultaneously patterned on the touch insulating layer 25 through a fifth mask process. Next, a touch protection layer 28 is patterned on the substrate 21 including the sensing electrode 26 and the driving electrode 27 through a sixth mask process.

A liquid crystal display device according to the prior art in which such a touch panel is applied in an add-on method has the following problems.

First, since the touch panel 20 is disposed on the top of the liquid crystal panel 10, there is a problem in that the overall thickness of the liquid crystal display is increased.

Second, after the liquid crystal panel 10 and the touch panel 20 are separately manufactured, the manufacturing process is complicated and the manufacturing cost is increased due to bonding using an adhesive layer (not shown).

Third, when the touch panel 20 is formed, six mask processes are required, and thus the manufacturing process is complicated and the manufacturing cost is increased.

The present invention has been devised to solve the above-described conventional problems, and the present invention provides a liquid crystal display device having a touch screen capable of realizing a narrow bezel by integrating a touch panel, that is, a touch screen into a cell. It has a purpose.

The present invention has been devised to solve the above-described conventional problems, and the present invention has an object to provide a liquid crystal display device having a touch screen built therein to reduce the number of mask processes by integrating a touch panel and a color filter substrate.

In order to achieve the above object, the present invention includes a color filter layer in which a touch screen is embedded on a substrate, and an active layer, a gate electrode, a source electrode, a drain electrode, a pixel electrode, and a common electrode while being formed on the color filter layer. A thin film transistor layer is formed, and the color filter layer includes a black matrix formed on a substrate, a touch line formed on the black matrix, a bridge formed on the black matrix and the touch line, and a portion of the bridge to expose the bridge. A formed touch insulating film, a plurality of first touch electrodes formed in a first direction on the touch insulating film, a plurality of second touch electrodes formed in a second direction while being spaced apart from the first touch electrode on the touch insulating film, and the plurality of first It provides a liquid crystal display with a touch screen, characterized in that it comprises an overcoat formed on the touch electrode and a plurality of second touch electrodes.

The present invention also provides a liquid crystal display device having a touch screen including a color filter layer and a thin film transistor layer on a substrate, wherein the method of manufacturing the color filter layer comprises: a step of forming a black matrix on the substrate, the black matrix Forming a touch line on the process, forming a bridge on the black matrix and the touch line, forming a touch insulating film on the bridge so that a part of the bridge is exposed, a plurality of firsts on the touch insulating film And forming a touch electrode and a second touch electrode, and forming an overcoat on the plurality of first and second touch electrodes. Provides a method.

In addition to the technical problems of the present invention mentioned above, other features and advantages of the present invention are described below, or it will be clearly understood by those skilled in the art from the description and description.

According to the present invention as described above has the following effects.

The present invention can implement a narrow bezel (Narrow Bezel) by integrating the touch panel, that is, the touch screen in the cell.

The present invention can reduce the manufacturing cost by reducing the number of mask processes by integrating the touch panel and the color filter substrate.

In addition, other features and advantages of the present invention may be newly identified through embodiments of the present invention.

1 is a cross-sectional view schematically showing a liquid crystal display device according to a prior art in which a touch panel is applied in an add-on method.
2A to 2F are schematic manufacturing process diagrams of a touch panel according to the prior art.
3 is a schematic cross-sectional view of a liquid crystal display having a touch screen according to an embodiment of the present invention.
4 is a graph showing a liquid crystal driving performance of a liquid crystal display device having a touch screen according to an embodiment of the present invention.
5A to 5E are schematic manufacturing process diagrams of a liquid crystal display equipped with a touch screen according to an embodiment of the present invention.

It should be noted that in this specification, when adding reference numerals to components of each drawing, the same components have the same number as possible, even if they are displayed on different drawings.

On the other hand, the meaning of the terms described in this specification should be understood as follows.

It should be understood that a singular expression includes a plurality of expressions unless the context clearly defines otherwise, and the terms "first", "second", etc. are intended to distinguish one component from another component, The scope of rights should not be limited by these terms.

It should be understood that terms such as "include" or "have" do not preclude the presence or addition possibility of one or more other features or numbers, steps, actions, components, parts or combinations thereof.

It should be understood that the term “at least one” includes all possible combinations from one or more related items. For example, the meaning of “at least one of the first item, the second item, and the third item” means 2 of the first item, the second item, and the third item, as well as the first item, the second item, and the third item, respectively. Any combination of items that can be presented from more than one dog.

The term "on" is meant to include not only the case where a certain component is formed on the upper surface of another component, but also the case where a third component is interposed between these components.

Hereinafter, preferred embodiments of the present invention designed to solve the above problems will be described in detail with reference to the accompanying drawings.

3 is a schematic cross-sectional view of a liquid crystal display having a touch screen according to an embodiment of the present invention.

3 is a circuit diagram for driving a pixel formed in a liquid crystal panel of the present invention, a backlight unit that supplies light to a liquid crystal panel, a touch sensing driver for detecting a user's touch, an upper substrate, and an illustration of a liquid crystal layer is omitted .

As can be seen in FIG. 3, the liquid crystal display having a touch screen according to an embodiment of the present invention includes a substrate 100, a color filter layer CL formed on the substrate 100, and a color filter layer CL. It comprises a thin film transistor layer (TL) formed on.

The substrate 100 is formed of a transparent insulating substrate made of glass, quartz, ceramic, and plastic. However, one embodiment of the present invention is not limited thereto. In addition, when the substrate 100 is made of plastic or the like, it may be formed of a flexible substrate.

The color filter layer CL is formed by a built-in touch screen.

The color filter layer CL may have a color filter function and a touch function simultaneously by integrating a color filter and a touch electrode.

That is, the present invention is a TFT on Color Filter (TOC) structure in which a color filter layer CL is formed on a substrate 100 and a thin film transistor layer TL is formed on the color filter layer CL. , The color filter layer CL is a liquid crystal display device having a touch screen having a function of a touch screen.

The color filter layer CL includes a black matrix 110, a touch line 120, a bridge 130, a color filter 140, a first touch electrode 150, a second touch electrode 160, and over It comprises a coat (170a).

The black matrix 110 is formed on the substrate 100.

The black matrix 110 is formed to prevent light leakage. The black matrix 110 may be formed by laminating and patterning CrO or CrO2, or by coating a black resin.

The touch line 120 is formed on the black matrix 110.

The touch line 120 may connect the first touch electrode 150 and the second touch electrode 160 to a touch pad (not shown). Although not shown in the drawing, the touch pad (not shown) is connected to the touch sensing driver through FPC.

The bridge 130 is formed on the black matrix 110 and the touch line 120.

The bridge 130 is connected to the second touch electrode 160. That is, the bridge 130 performs a function of electrically connecting the second touch electrode 160 in an area where the first touch electrode 150 and the second touch electrode 160 intersect.

In this case, the second touch electrode 160 may be a driving electrode, and the same driving pulse may be supplied to two driving electrodes connected through the bridging 130.

The touch insulating layer 140 is formed on the bridge 130 so that a part of the bridge 130 is exposed.

In this case, the touch insulating layer 140 may be formed of a color filter.

The color filters are provided with red, green, and blue color filters to realize color. The red, green, and blue color filters appear red, green, and blue by absorbing or transmitting light of a specific wavelength through the red, green, and blue pigments contained therein, respectively. At this time, various colors may be realized through additive mixing of red, green, and blue light that has passed through the red, green, and blue color filters, respectively.

The plurality of first touch electrodes 150 and the second touch electrodes 160 are formed on the touch insulating layer 140.

The first touch electrode 150 may be formed on the touch insulating layer 140 in a first direction (for example, an X-axis direction), and the second touch electrode 150 may be the first touch electrode 150. It may be formed in the second direction (for example, the Y-axis direction) while being spaced apart.

The first touch electrode 150 and the second touch electrode 160 are formed by stacking and etching Cr, MO, Ta, Cu, Ti, Al, or Al alloy having good conductivity.

A capacitance is formed between the first touch electrode 150 and the second touch electrode 160, and the capacitance changes depending on whether or not the touch occurs, and the touched area is sensed by detecting the changed capacitance.

At this time, any one of the first touch electrode 150 and the second touch electrode 160 is a driving electrode to which a touch sensing signal is applied, and the other electrode may be a sensing electrode for touch detection.

The first touch electrode 150 and the second touch electrode 160 are formed to be orthogonal to each other. In order to detect the touch positions of the X and Y axes, the plurality of driving electrodes and the plurality of sensing electrodes should not be shorted to each other.

To this end, a bridge 130 connects one of the driving electrode and the sensing electrode by using the bridge 130 in a region where the driving electrode and the sensing electrode intersect. Then, the other electrode is passed through the upper portion of the touch insulating layer 140 to separate the driving electrode and the sensing electrode.

The overcoat 170a is formed on the plurality of first touch electrodes 150 and the plurality of second touch electrodes 160.

The overcoat 170a is formed to cover the first touch electrode 150, the second touch electrode 160, and the color filter 140.

The overcoat 170a may be made of an organic insulating material such as photoacryl or benzocyclobutene (BCB).

As such, by forming one black matrix 130 on the substrate 100 and using a color filter as the touch insulating layer 140, a color filter layer CL having a touch screen may be formed.

For this reason, the liquid crystal display device with a built-in touch screen according to an embodiment of the present invention can be formed by integrating a touch screen and a liquid crystal panel, thereby simplifying the manufacturing process and reducing manufacturing cost compared to the prior art.

In addition, a narrow bezel may be implemented by integrating a touch screen into a cell, that is, a color filter layer.

The thin film transistor layer TL is formed on the color filter layer CL.

The thin film transistor layer TL includes the active layer 210, the gate insulating film 220, the gate electrode 230, the interlayer insulating film 240, the source electrode 250a, the drain electrode 250b, and the protective film 170b, in common. It includes an electrode 260, an electrode insulating film 270, and a pixel electrode 280.

The active layer 210 is formed on the overcoat 170a. The active layer 210 may be formed of an oxide semiconductor such as In-Ga-Zn-O (IGZO), but is not limited thereto.

The gate insulating layer 220 and the gate electrode 230 are patterned on the active layer 210.

The gate insulating layer 220 may be made of an inorganic insulating material such as silicon oxide or silicon nitride, but is not limited thereto, and may be made of an organic insulating material such as photo acryl or benzocyclobutene (BCB). have.

The gate electrode 230 is molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodium (Nd), copper (Cu), or their It may be made of an alloy, and may be made of a single layer of the metal or alloy or multiple layers of two or more layers.

The interlayer insulating layer 240 is patterned with contact holes for exposing one end and the other end of the active layer 210 on the overcoat 170a.

The interlayer insulating layer 240 may be made of an inorganic insulating material such as silicon oxide or silicon nitride, but is not limited thereto.

The source electrode 250a and the drain electrode 250b are formed to face each other on the interlayer insulating layer 240.

The source electrode 250a and the drain electrode 250b are connected to the active layer 210 through a contact hole.

The source electrode 250a and the drain electrode 250b are molybdenum (Mo), aluminum (Al), chromium (Cr), gold (Au), titanium (Ti), nickel (Ni), neodium (Nd), copper (Cu), or an alloy thereof, and may be formed of a single layer of the metal or alloy or multiple layers of two or more layers.

The passivation layer 170b includes a contact hole exposing the drain electrode 250b and is formed on the interlayer insulating layer 240.

The protective layer 170b may be made of an organic insulating material such as photo acryl or benzocyclobutene (BCB).

The common electrode 260 is patterned on the passivation layer 170b.

The electrode insulating layer 270 is formed on the protective layer 170b including a contact hole exposing the drain electrode 250b.

The pixel electrode 280 is formed on the electrode insulating layer 270 and is connected to the drain electrode 250b through the contact hole.

The pixel electrode 280 supplies a data voltage to the pixel, and the common electrode 260 supplies a common voltage Vcom to the pixel. When a data voltage and a common voltage are supplied to a pixel, an electric field is formed, and a liquid crystal layer (not shown) is driven by the electric field to display an image.

Here, the common electrode 260 and the pixel electrode 280 are formed of a transparent conductive material such as Indium Tin Oxide (ITO).

However, the present invention is not limited to the structures of the common electrode 260 and the pixel electrode 280 described above, and the present invention generates an electric field in the pixel region through the common electrode 260 and the pixel electrode 280 to form a liquid crystal. In the case of driving a molecule, any of the structures of the common electrode 260 and the pixel electrode 280 can be applied.

4 is a graph showing the performance of driving a liquid crystal of a liquid crystal display having a touch screen according to an embodiment of the present invention, the horizontal axis represents the voltage applied to the touch electrode, and the vertical axis represents the transmittance of the liquid crystal.

Referring to FIG. 4, it is understood that the liquid crystal display having a touch screen according to an embodiment of the present invention is formed in the same manner as the transmittance of liquid crystal according to the voltage applied to the touch electrode compared to when there is no touch electrode in the cell. Can be.

On the other hand, when the touch electrode is formed on the substrate 100, it can be seen that the transmittance of the liquid crystal does not change.

This is because the common electrode 260 is formed on the touch electrode, that is, the first touch electrode 150 and the second touch electrode 160, between the first touch electrode 150 and the second touch electrode 160. This is because the capacitance is formed and the common electrode 260 does not affect the driving of the liquid crystal even if the capacitance changes depending on whether or not the touch occurs.

In the following, repeated descriptions of repeated parts in materials and structures of the respective structures will be omitted.

5A to 5E are schematic manufacturing process diagrams of a liquid crystal display device with a touch screen according to an embodiment of the present invention, and in particular, this is a color included in the liquid crystal display device with a touch screen according to FIG. 3 described above. It relates to a manufacturing process chart of the filter layer.

5A, the black matrix 110 is patterned on the substrate 100.

Although not shown in the drawing, the process of forming one thin film is as follows. After a thin film is deposited on an arbitrary layer and a photosensitive film is applied thereon, the photosensitive film is selectively removed through an exposure process and a development process using a mask to form a photosensitive film pattern. And only one thin film is formed through an etching process using the photosensitive film pattern as a blocking film.

The method of manufacturing a liquid crystal display device according to the present invention manufactures a layer through such thin film deposition, photosensitive film application, exposure, development, and etching processes.

That is, the black matrix 110 is patterned on the substrate 100 through a first mask process.

Next, as can be seen in FIG. 5B, a touch line 120 is patterned on the black matrix 110 through a second mask process.

Next, as can be seen in FIG. 5C, a bridge 130 is patterned on the black matrix 110 and the touch line 120 through a third mask process.

At this time, although not shown, the number of masking processes can be reduced by simultaneously forming the touch line 120 and the bridge 130 using a halftone mask.

Next, as can be seen in FIG. 5D, a touch insulating layer 140 is patterned on the bridge 130 so that a part of the bridge 130 is exposed through a fourth mask process.

In this case, the touch insulating layer 140 may be formed of a color filter.

Next, as shown in FIG. 5E, a plurality of first touch electrodes 150 and second touch electrodes 160 are patterned on the touch insulating layer 140 through a fifth mask process.

The plurality of first touch electrodes 150 and the second touch electrodes 160 are formed to be orthogonal to each other. In order to detect touch positions of the X-axis and Y-axis, the plurality of first touch electrodes 150 and the second touch The electrodes 160 should not be shorted to each other.

At this time, any one of the first touch electrode 150 and the second touch electrode 160 is a driving electrode to which a touch sensing signal is applied, and the other electrode may be a sensing electrode for touch detection.

Also, the second touch electrode 160 may be in contact with the bridge 130.

Next, as can be seen in FIG. 5F, an overcoat 170a is patterned on the plurality of first touch electrodes 150 and the second touch electrodes 160 through a sixth mask process.

The overcoat 170a flattens the surface of the substrate 100 by laminating an organic insulating material such as an acrylic compound.

As described above, the process of forming the color filter layer CL included in the liquid crystal display having the touch screen according to an embodiment of the present invention requires six masks, but the black matrix 130 and the touch insulating film ( The process of forming 140) can be reduced by two mask processes by integrating it into a process that overlaps the touch screen and the color filter substrate, thereby reducing manufacturing cost.

Those skilled in the art to which the present invention pertains will appreciate that the above-described present invention can be implemented in other specific forms without changing its technical spirit or essential features.

For example, in the above-described embodiment, the thin film transistor has been described as having a coplanar structure, that is, the gate electrode 230, the source electrode 250a, and the drain electrode 250b are on one side of the active layer 210. In an embodiment, the staggered structure, that is, the gate electrode 230 and the source electrode 250a and the drain electrode 250b may have the active layer 210 interposed therebetween.

Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the following claims rather than the above detailed description, and it should be interpreted that all changes or modifications derived from the meaning and scope of the claims and equivalent concepts are included in the scope of the present invention. do.

CL: Color filter layer TL: Thin film transistor layer
100: substrate 110: black matrix
120: touch line 130: bridge
140: color filter 150: first touch electrode
160: second touch electrode 170: overcoat
210: active layer 220: gate insulating film
230: gate electrode 240: interlayer insulating film
250a: source electrode 250b: drain electrode
170b: protective film 260: common electrode
270: electrode insulating film 280: pixel electrode

Claims (14)

A color filter layer having a touch screen embedded on the substrate; And
While forming on the color filter layer includes a thin film transistor layer including an active layer, a gate electrode, a source electrode, a drain electrode, a pixel electrode, and a common electrode,
The color filter layer,
A black matrix formed on the substrate;
A touch line formed on the black matrix;
A bridge formed on the black matrix and the touch line;
A touch insulating film formed on the bridge so that a part of the bridge is exposed;
A plurality of first touch electrodes formed in a first direction on the touch insulating film;
A plurality of second touch electrodes formed in a second direction while being spaced apart from the first touch electrodes on the touch insulating film; And
And an overcoat formed on the plurality of first touch electrodes and the plurality of second touch electrodes,
The overcoat is located between the color filter layer and the thin film transistor layer,
A liquid crystal display having a touch screen, wherein the active layer of the thin film transistor layer is formed on the overcoat. According to claim 1,
The touch insulating film is made of a color filter, a liquid crystal display device with a touch screen. According to claim 1,
Any one of the first touch electrode and the second touch electrode is a driving electrode to which a touch sensing signal is applied, and the other electrode is a sensing electrode for touch detection. According to claim 1,
The bridge is in contact with the second touch electrode, a liquid crystal display device with a built-in touch screen. According to claim 1,
The overcoat is made of an organic insulating material, a liquid crystal display device with a built-in touch screen. A method of manufacturing a liquid crystal display device having a touch screen including a color filter layer and a thin film transistor layer on a substrate,
The manufacturing method of the color filter layer,
Forming a black matrix on the substrate;
Forming a touch line on the black matrix;
Forming a bridge on the black matrix and the touch line;
Forming a touch insulating film on the bridge such that a part of the bridge is exposed;
Forming a plurality of first touch electrodes and second touch electrodes on the touch insulating layer; And
And forming an overcoat on the plurality of first touch electrodes and the second touch electrodes,
And forming a thin film transistor layer including an active layer, a gate electrode, a source electrode, a drain electrode, a pixel electrode, and a common electrode on the color filter layer.
The overcoat is located between the color filter layer and the thin film transistor layer,
A method of manufacturing a liquid crystal display having a touch screen, wherein the active layer of the thin film transistor layer is formed on the overcoat. The method of claim 6,
The touch insulating film is made of a color filter, a method of manufacturing a liquid crystal display device with a built-in touch screen. The method of claim 6,
A method of manufacturing a liquid crystal display having a touch screen, wherein one of the first touch electrode and the second touch electrode is a driving electrode to which a touch sensing signal is applied, and the other electrode is a sensing electrode for touch detection. The method of claim 6,
The bridge is in contact with the second touch electrode, a method of manufacturing a liquid crystal display device with a built-in touch screen. The method of claim 6,
The overcoat is made of an organic insulating material, a method of manufacturing a liquid crystal display device with a built-in touch screen. According to claim 1,
The overcoat is formed to cover the touch insulating layer, the plurality of first touch electrodes, and the plurality of second touch electrodes,
A liquid crystal display device having a built-in touch screen, wherein the active layer of the thin film transistor layer and the interlayer insulating film covering the active layer are directly contacted on the upper surface of the overcoat. According to claim 1,
The color filter layer and the thin film transistor layer are formed to be sequentially stacked on the same substrate, a liquid crystal display device with a built-in touch screen. The method of claim 6,
The step of forming the overcoat,
It is formed to cover the touch insulating film, the plurality of first touch electrodes and the plurality of second touch electrodes,
The process of forming the thin film transistor layer,
A method of manufacturing a liquid crystal display device with a built-in touch screen, wherein the active layer of the thin film transistor layer and the interlayer insulating film covering the active layer are formed in direct contact with the upper surface of the overcoat. The method of claim 13,
The color filter layer and the thin film transistor layer are formed to be sequentially stacked on the same substrate, a method of manufacturing a liquid crystal display with a touch screen.

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