KR101782028B1 - Touch panel type liquid crystal display device - Google Patents

Abstract

The present invention relates to a liquid crystal display, and more particularly, to a liquid crystal display including a touch sensor capable of blocking external light.
A feature of the present invention is that the first and second polarizing layers on which the polarization axes are formed are positioned on the upper and lower portions of the liquid crystal panel, and the second polarizing layer positioned on the upper portion of the liquid crystal panel is positioned close to the lower portion of the touch panel.
As a result, the external light incident from the outside can be blocked by the touch panel, thereby improving the contrast and preventing the degradation of the screen quality due to the deterioration of the visibility due to the reflection of external light.
In particular, since a separate polarizing plate is not required to be attached to the lower part of the touch panel for blocking external light, it is possible to prevent the thickness of the touch panel type liquid crystal display device from becoming thick and the transmittance to decrease, The material cost can be reduced by not using the high luminance LED and the brightness enhancement film separately due to the decrease in transmittance.

Description

[0001] The present invention relates to a touch panel type liquid crystal display device,

The present invention relates to a liquid crystal display, and more particularly, to a liquid crystal display including a touch sensor capable of blocking external light.

A liquid crystal display device (LCD), which is advantageous for moving picture display and has a large contrast ratio and is actively used in TVs and monitors, exhibits optical anisotropy and polarization properties of a liquid crystal, And the like.

Such a liquid crystal display device has a liquid crystal panel in which a liquid crystal panel is interposed between two adjacent substrates through a liquid crystal layer as an essential component and changes the alignment direction of the liquid crystal molecules in an electric field in the liquid crystal panel to realize a difference in transmittance do.

In recent years, an active matrix liquid crystal display device that drives a liquid crystal with an electric field formed by an upper-lower portion has been widely used because of its excellent resolution and moving image realization capability. However, liquid crystal driving by an electric field applied at an upper-

Accordingly, various methods have been proposed in order to overcome the disadvantage that the viewing angle is narrow. Among them, a liquid crystal driving method by a transverse electric field is attracting attention.

In recent years, a touch panel having the advantage of being able to input letters and pictures more conveniently and precisely has been widely used in electronic notebooks or personal information processing apparatuses. Recently, such a touch panel is attached to a lateral electric field type liquid crystal display A touch panel type liquid crystal display device is provided.

The resistive film type, the capacitive type, the infrared type, and the ultrasonic type are used for the above-mentioned touch panel, and the resistive film type is currently used, and the capacitive type is used for minimizing the thickness.

Here, when the upper surface of the ITO is touched with the finger, the capacitive touch panel senses the touch position by detecting each electrode according to the variation of the capacitance through the finger.

On the other hand, such a touch panel type liquid crystal display device has a high surface reflectance, which causes a problem that the quality of a screen is deteriorated due to a decrease in visibility due to reflection of external light.

It is a first object of the present invention to effectively improve outdoor visibility characteristics of a touch panel type liquid crystal display device in order to solve the above problems.

Another object of the present invention is to provide a lightweight, thin type touch panel type liquid crystal display device. The second object of the present invention is to provide a touch panel type liquid crystal display device which can improve the reliability of a touch panel type liquid crystal display device and improve process efficiency and process efficiency. The third purpose is to do.

According to an aspect of the present invention, there is provided a liquid crystal display comprising: a liquid crystal panel; A first polarizing layer positioned below the liquid crystal panel; A second polarizing layer positioned above the liquid crystal panel; And a touch panel positioned above the second polarizing layer, wherein the air layer is defined at a predetermined interval between the liquid crystal panel and the second polarizing layer.

Here, the first and second retardation layers are interposed between the liquid crystal panel and the second polarizing layer, the air layer is defined between the first and second retardation layers, and the first and second retardation layers 1 and a second 1/4 lambda wavelength plate (QWP) or a first and a second lambda lambda wave plate (HWP).

The first retardation layer is formed of a quarter wave plate (QWP), and the second retardation layer is formed of a wide band (QWP) composed of a quarter wave plate (QWP) and a half wave plate (HWP) The retardation value Rin of the 1/4? Wave plate (QWP) is 140 ± 25 nm, and the ratio of the thickness direction retardation value to the retardation value Nz (Rth / Rin) Is 0.3 ± 1.8.

Also, the 1/2 wavelength plate (HWP) has a retardation value (Rin) of 270 ± 50 nm on the surface and Nz (Rth / Rin) of the retardation value in the thickness direction with respect to the retardation value in the thickness direction is 0.5 ± 0.1 , And first and second TAC films are positioned on both sides of the first polarizing layer.

Here, the third and fourth TAC films are disposed on one surface of the first and second retardation layers facing the air layer, and the touch panel includes an upper electrode and a lower electrode spaced apart from the upper electrode by a predetermined distance do.

The upper electrode is formed on the upper substrate, the lower electrode is formed on the lower substrate facing the upper substrate, the upper electrode is formed on one surface of the touch substrate, Respectively.

The liquid crystal panel may include a first substrate including a thin film transistor, a gate line, a data line, and a pixel electrode; A second substrate including a black matrix layer, a color filter layer, and a common electrode, the second substrate being opposed to the first substrate; And a liquid crystal layer interposed between the first substrate and the second substrate.

The liquid crystal panel may include a first substrate including a thin film transistor, a gate wiring, a data line, a pixel electrode, and a common electrode; A second substrate including a black matrix layer and a color filter layer, the second substrate being opposed to the first substrate; And a liquid crystal layer interposed between the first substrate and the second substrate.

As described above, according to the present invention, the first and second polarizing layers having polarization axes for changing the direction of alignment of liquid crystal molecules in the liquid crystal panel and changing the polarization direction of light so that an image is realized through a difference in transmittance, And the second polarizing layer positioned on the upper portion of the liquid crystal panel is located close to the lower portion of the touch panel, thereby preventing external light incident from the outside with the touch panel, thereby improving the contrast .

Therefore, it is possible to prevent the problem that the quality of the screen is deteriorated due to the deterioration of the visibility due to the reflection of external light.

Particularly, since a separate polarizing plate is not required to be attached to the lower part of the touch panel in order to cut off external light, it is possible to prevent the thickness of the touch panel type liquid crystal display device from being increased and the transmittance to be lowered .

In addition, since the high luminance LED and the brightness enhancement film are not used separately due to the decrease in transmittance, the material cost can also be reduced.

1A and 1B are sectional views schematically showing a touch panel type liquid crystal display device according to an embodiment of the present invention.
2 is a graph showing refractive index coordinates;
3A and 3B are simplified cross-sectional views illustrating the operation of a touch sensor in a touch panel type liquid crystal display device according to an embodiment of the present invention.
4 is a cross-sectional view schematically illustrating a touch panel according to another embodiment of the present invention.
5 is a simulation result of an image according to a viewing angle of a touch panel type liquid crystal display device according to an embodiment of the present invention.

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

1A and 1B are cross-sectional views schematically showing a touch panel type liquid crystal display device according to an embodiment of the present invention, and FIG. 2 is a graph showing refractive index coordinates.

1A, a touch panel type liquid crystal display 100 according to an embodiment of the present invention includes a liquid crystal panel 110, a touch panel 120 on a liquid crystal panel 110, first and second polarized light Layers 130 and 140, respectively.

The liquid crystal panel 110 includes a first substrate 101 as an array substrate and a second substrate 102 as a color filter substrate which are spaced apart from each other and facing each other. The liquid crystal layer 103 is interposed.

At this time, although not shown, a plurality of gate wirings formed parallel to each other and spaced apart from each other by a predetermined distance are formed on the first substrate 101 and data wirings that define pixel regions intersect the gate wirings.

A thin film transistor is formed at the intersection of the gate line and the data line in each pixel region and a plurality of pixel electrodes made of a transparent conductive material are formed in each pixel region through a thin film transistor and a drain contact hole.

Here, the thin film transistor includes a gate electrode, a gate insulating film, a semiconductor layer, and a source and a drain electrode.

At this time, the pixel electrodes are separated into a plurality of bar electrodes, and are spaced apart from each other and are formed in each pixel region. In addition, a common wiring is formed in the same layer in parallel with the gate wiring, and a plurality of common electrodes are formed, which are electrically connected to the common wiring and are alternately spaced apart from the plurality of pixel electrodes separated in each pixel region.

On the other hand, as a modification, the pixel electrodes may be formed in a plate shape for each pixel region. At this time, a part of the pixel electrode may be formed so as to overlap the gate wiring, and may be configured to form the storage capacitor StgC.

When a plurality of pixel electrodes and a common electrode are spaced apart from each other in the pixel region, an array substrate 101 for a liquid crystal panel 110 operating in an IPS mode is formed. When only the electrode is formed on the array substrate 101, it forms an array substrate 101 for a liquid crystal panel that operates in any one of a TN mode, an ECB mode, and a VA mode. In the figure, an array substrate 101 for a liquid crystal panel which operates in an IPS mode will be described as an example.

A black matrix having openings corresponding to the pixel regions is formed on the second substrate 102 facing the first substrate 101. Red, green, and blue color filters, which are sequentially and repeatedly arranged corresponding to the openings, A color filter layer is formed.

An overcoat layer is formed on the color filter layer.

A first polarizing layer 130 having a polarization axis for changing a polarization characteristic of light is disposed on the lower portion of the liquid crystal panel 110. The first polarizing layer 130 is protected on both sides of the first polarizing layer 130, The first and second TAC films 150a and 150b are positioned.

The first and second TAC films 150a and 150b are made of triacetylcellulose and serve to maintain the stretched state of the first polarizing layer 130.

At this time, the first TAC film 150a exposed to the outside may be hard coated to prevent damage to the surface.

The retardation layers 160a and 160b, the second polarizing layer 140, and the touch panel 120 are sequentially disposed on the liquid crystal panel 110. [

The phase difference layers 160a and 160b located on the liquid crystal panel 110 include first and second 1/4? Wave plates (QWPs) 160a and 160b for changing the polarization state of light.

That is, the liquid crystal layer 103 of the liquid crystal panel 110 has birefringent refractive indices different from each other in the major axis direction and the minor axis direction of the liquid crystal molecules. Depending on the position of the liquid crystal panel 110 facing the liquid crystal panel 110, And the phase difference is generated when the linearly polarized light passes through the liquid crystal layer 103 and the polarization state is changed. Thus, the amount of light when viewed from the front is different from the amount of light when viewed from the front.

Accordingly, a phenomenon such as a change in a contrast ratio, a color shift, and a gray inversion occurs depending on a viewing angle, resulting in unwanted light leakage.

In order to solve such a problem, the retardation layers 160a and 160b are positioned above the liquid crystal panel 110 as a method of compensating for the retardation generated in the liquid crystal panel 110. [

The first and second 1/4? Wave plates (QWPs 160a and 160b) have a phase difference corresponding to? / 4 (? = 550 nm) And 160b change the incident circularly polarized light to linearly polarized light or linearly polarized light to circularly polarized light.

That is, the first and second 1/4? Wave plates (QWPs 160a and 160b) delay the phase of the passing light by? / 4.

Therefore, the difference in retardation of light according to the viewing angle can be eliminated through the first and second 1/4? Wave plates (QWPs 160a and 160b).

The first and second lambda 1/4 lambda wave plates (QWP) 160a and 160b are preferably made of a film type of polyethersulfone (PES) or cycloolefin polymer (COP) PES and COP are excellent in reliability at high temperature and high humidity and can be produced by melting method.

The second polarizing layer 140 and the touch panel 120 are sequentially disposed on the second 1/4? Wave plate 160b of the present invention. The second 1/4? Wave plate 160b And the touch panel 120 serve to protect and support the second polarizing layer 140.

3A) and a lower electrode 123 (see FIG. 3A) formed in the form of a film, in which the upper electrode 125 (see FIG. 3A) Spacers (not shown) are formed between the lower substrate 121 (see FIG. 3A) and the upper substrate 122 (see FIG. 3A) and the lower substrate 121 .

When the upper substrate 122 (see FIG. 3A) is brought into contact with any one point by a predetermined input means such as a finger 200 (see FIG. 3A) or a pen, (See FIG. 3A) formed on the lower substrate 121 (see FIG. 3A) and the lower electrode 123 (see FIG. 3A) formed on the lower substrate 121 The position coordinates can be found according to the change of the potential difference.

The touch panel type liquid crystal display 100 may include first and second polarized light beams (polarized light beams) having polarization axes that change the polarization direction of light so that an image is realized through a difference in transmittance by changing the arrangement direction of liquid crystal molecules in the liquid crystal panel 110 The layers 130 and 140 are positioned at the upper and lower portions of the liquid crystal panel 110 and the external light incident from the outside through the touch panel 120 through the second polarizing layer 140 located at the upper portion of the liquid crystal panel 110 The contrast can be improved.

That is, the touch panel type liquid crystal display device 100 has a disadvantage that the contrast is greatly reduced according to the intensity of external light. Accordingly, the second polarizing layer 140 is formed in the light transmission direction in order to prevent a decrease in contrast due to external light.

The external light incident from the outside to the touch panel type liquid crystal display device 100 through the second polarizing layer 140 is incident through the second polarizing layer 140, and the incident external light is incident on the touch panel type liquid- And the polarized direction of the light is changed.

Therefore, the incident external light can not transmit through the second polarizing layer 140 and can not exit to the outside, causing extinction interference.

As a result, the contrast is improved by blocking external light.

Particularly, since a separate polarizing plate (not shown) is not attached to the lower part of the touch panel 120 for blocking external light, the thickness of the touch panel type liquid crystal display device 100 becomes thick and the transmittance is lowered Can be prevented.

In addition, since a high luminance LED (not shown) and a brightness enhancement film (not shown) due to a decrease in transmittance are not used separately, the material cost can also be reduced.

In order to prevent electrical interference between the touch panel 120 and the liquid crystal panel 110, it is preferable that the touch panel 120 and the liquid crystal panel 110 are spaced apart from each other by a predetermined distance. The touch panel type liquid crystal display device 100 according to the embodiment of the present invention may be arranged such that the first quarter wave plate (QWP) 160a and the second one quarter wave plate (QWP) 160b are spaced apart from each other desirable.

Accordingly, the first and second polarizing layers 130 and 140 are positioned at the upper and lower portions of the liquid crystal panel 110 to change the arrangement direction of the liquid crystal molecules in the liquid crystal panel 110, thereby realizing an image through the difference in transmittance And the second polarizing layer 140 are positioned close to the lower portion of the touch panel 120, it is possible to prevent a problem that visibility due to reflection of external light is lowered.

The first and second 1/4? Wave plates (QWPs 160a and 160b) define an air layer 170. The first and second 1/4? Wave plates (QWPs 160a and 160b) Third and fourth TAC films (not shown) are respectively sandwiched between the first and second 1/4? Wave plates (QWPs 160a and 160b) and the air layer 170 in order to prevent the air layer 170 from being exposed to the air layer 170 May be further provided.

At this time, the third and fourth TAC films (not shown) facing the air layer 170 may be hard coated to prevent surface damage.

Here, instead of the first and second lambda / 4 lambda wave plates (QWPs 160a and 160b), first and second lambda lambda wave plates (HWP: not shown) for rotating linearly polarized light by linearly polarized light may be used.

1B, a first 1/4? Wave plate (QWP) 160a is disposed on the liquid crystal panel 110 and a second 1/4? Wave plate (QWP) 160b is disposed on the lower part of the touch panel 120, And wide-band retardation plates 160b and 160c formed of a 1/2 lambda wavelength plate (HWP) 160c.

The 1/2? Wave plate (HWP: 160c) is also preferably made of a film type of polyethersulfone (PES) or cycloolefin polymer (COP) series.

Here, the first and second 1/4? Wave plates (QWPs 160a and 160b) according to the present invention have refractive indices of nx, ny and nz according to the spatial coordinate system of FIG. 2. The refractive indices nx and ny correspond to the first and second Is the refractive index in the X and Y directions of the plane of the 1/4? Wave plate (QWP: 160a, 160b), and nz is the refractive index in the normal direction of the first and second? / 4 lambda wave plates (QWP: 160a, 160b).

Accordingly, the first and second 1/4 lambda wave plates (QWPs) 160a and 160b have a function of refracting the incident light according to the optical refraction index.

The first and second 1/4? Wave plates (QWPs 160a and 160b) thus defined are represented by the phase retardation values Rin and Rth in the plane and in the thickness direction, respectively, expressed by the following equations (1) and .

Rin = (nx - ny) 占 d Equation 1

(Where d is the thickness of the negative biaxial film)

Rth = (nz - ny) x d Equation 2

(Where d is the thickness of the negative biaxial film)

Here, Rin, the phase delay value on the surface of the first and second 1/4? Wave plates (QWPs 160a and 160b) calculated by Equation 1 has a value of 140 ± 25 nm, and the phase retardation value It is preferable that the value of Nz (Rth / Rin) which is a ratio of the thickness direction retardation value to the thickness direction has a value of 0.3 ± 1.8.

It is preferable that the phase retardation value Rin of the 1/2 wavelength plate (HWP: 160c) of the wideband phase difference plates 160b and 160c has a value of 270 ± 50 nm, and the thickness It is preferable that the value of Nz (Rth / Rin), which is the ratio of the direction retardation value, has a value of 0.5 + - 0.1.

Accordingly, the first and second lambda / 4 lambda wave plates (QWP) 160a and 160b and the lambda lambda wave plates (HWP) 160c of the wideband retarders 160b and 160c have negative biaxial characteristics .

Negative biaxial properties have the relationship n _x > n _y > n _z according to the spatial coordinate system.

3A) formed with the upper electrode 125 (see FIG. 3A) and the lower electrode 123 (see FIG. 3A) are formed on the upper surface of the touch panel 120, And the lower substrate 121 (see Fig. 3A) formed are opposed to each other and opposed to each other.

3A) is deposited on the entire surface of the lower substrate 121 (see FIG. 3A), and the lower electrode 123 (see FIG. 3A) is formed of indium-tin-oxide (ITO) Zinc-oxide (IZO).

The upper electrode 125 (see FIG. 3A) is formed in a bar shape having a predetermined distance from the upper substrate 122 (see FIG. 3A) facing the lower substrate 121 And is made of a metal material such as aluminum alloy (AlNd), magnesium (Mg), gold (Au), silver (Ag)

The upper electrode 125 (see FIG. 3A) and the lower electrode 123 (see FIG. 3A) constitute a touch sensor.

That is, the upper electrode 125 (see FIG. 3A) forms a resistance network around the lower electrode 123 (see FIG. 3A), and the resistance network equally controls the entire surface of the lower electrode 123 .

FIGS. 3A and 3B are schematic cross-sectional views illustrating the operation of a touch sensor in a touch panel type liquid crystal display device according to an exemplary embodiment of the present invention, and FIG. 4 is a cross-sectional view schematically illustrating a touch panel according to another exemplary embodiment of the present invention to be.

For convenience of explanation, only the liquid crystal panel (110 of FIG. 1B) and the first and second polarizing layers (130 and 140 of FIG. 1B) are omitted and only the touch panel 120 is shown.

3A, a touch of the user's finger 200 or the like is applied to the surface of the upper substrate 121 of the touch panel 120 in the touch panel type liquid crystal display (100 of FIG. 1B) according to the present invention. The fringe field formed between the upper electrode 125 and the lower electrode 123 is maintained constant, so that there is no change in capacitance of the capacitor, so that the operation is not performed.

3B, when a touch of the user's finger 200 or the like is generated on the surface of the upper substrate 122 of the touch panel 120, the touch panel 120 is formed between the upper electrode 125 and the lower electrode 123 The fringe field is affected by the finger 200 to which the touch is made and changes, thereby detecting that the touch sensor is touched, thereby performing the operation at the time of touch.

That is, the touch sensor of the touch panel 120 has a capacitor shape composed of a lower electrode 123 and an upper electrode 125 and a gap spaced by a predetermined distance therebetween. At this time, When the contact is made, the capacitive change due to the variation of the fringe field of the capacitor is recognized, thereby acting as a touch sensor.

4, the touch panel 120 may include an upper electrode 125 and a lower electrode 123 formed on both sides of one touch substrate 127.

At this time, the lower electrode 123 is entirely deposited on one side of the touch substrate 127, and the lower electrode 123 is made of indium-tin-oxide (ITO) or indium-zinc-oxide (IZO) .

An upper electrode 125 is formed on the other surface of the touch substrate 127 in the form of a bar spaced apart from the upper electrode 125 by a predetermined distance and may be formed of aluminum (Al), aluminum alloy (AlNd), magnesium (Mg) , Silver (Ag), or the like.

In the touch panel type liquid crystal display (100 of FIG. 1B), a polarizing axis for changing the polarization direction of light is formed so as to change the arrangement direction of liquid crystal molecules in the liquid crystal panel (110 of FIG. 1B) The first and second polarizing layers (130 and 140 in FIG. 1B) are positioned above and below the liquid crystal panel (110 in FIG. 1B) and the second polarizing layer The external light incident from the outside can be blocked by the touch panel 120, thereby improving the contrast.

Therefore, it is possible to prevent the problem of deterioration of the screen quality due to deterioration of visibility due to reflection of external light.

In particular, since a separate polarizing plate (not shown) is not required to be attached to the lower part of the touch panel 120 for blocking external light, the thickness of the touch panel type liquid crystal display device (100 of FIG. 1B) Can be prevented.

In addition, since a high luminance LED (not shown) and a brightness enhancement film (not shown) due to a decrease in transmittance are not used separately, the material cost can also be reduced.

5 is a simulation result of an image according to a viewing angle of a touch panel type liquid crystal display device according to an embodiment of the present invention.

Referring to FIG. 5, it can be seen that the image of the touch panel type liquid crystal display (100 of FIG. 1B) according to the embodiment of the present invention does not cause a decrease in visibility due to reflection of external light.

Accordingly, the touch panel type liquid crystal display (100 of FIG. 1B) according to the embodiment of the present invention changes the arrangement direction of the liquid crystal molecules in the liquid crystal panel (110 of FIG. 1B) 1B) 110 and the liquid crystal panel (110 of FIG. 1B), and the first and second polarizing layers (130 and 140 of FIG. 1B) External light incident from the outside can be blocked by the touch panel (120 in FIG. 4) through the second polarizing layer (140 in FIG. 1B), thereby improving the contrast.

Therefore, it is possible to prevent the problem of deterioration of the screen quality due to deterioration of visibility due to reflection of external light.

In particular, since a separate polarizing plate (not shown) is not required to be attached to the lower portion of the touch panel (120 of FIG. 4) for external light interception, the thickness of the touch panel type liquid crystal display (100 of FIG. It is possible to prevent a problem that the transmittance is lowered.

In addition, since a high luminance LED (not shown) and a brightness enhancement film (not shown) due to a decrease in transmittance are not used separately, the material cost can also be reduced.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the spirit of the present invention.

100: touch panel type liquid crystal display device,
110: liquid crystal panel (101: first substrate, 102: second substrate, 103: liquid crystal layer)
120: touch panel, 130: first polarizing layer, 140: second polarizing layer
150a, 150b: first and second TAC films
160a and 160b: first and second 1/4 lambda wavelength plates (QWP)
170: air layer

Claims (13)

A liquid crystal panel; A first polarizing layer positioned below the liquid crystal panel;
A first retardation layer positioned above the liquid crystal panel; A second retardation layer positioned above the first retardation layer;
A second polarizing layer positioned above the second retardation layer;
And a second polarizing layer
Wherein the first retardation layer and the second retardation layer are spaced apart to define an air layer,
And the second polarizing layer is protected and supported by the second retardation layer and the touch panel.
delete The method according to claim 1,
Wherein the first and second retardation layers comprise first and second lambda 1/4 lambda wave plates (QWP) or first and second lambda lambda wave plates (HWP).
The method according to claim 1,
Wherein the first retardation layer is made of a 1/4? Wave plate (QWP) and the second retardation layer is made of a 1/4? Wave plate (QWP) and a wide-band retardation Wherein the touch panel type liquid crystal display device is a touch panel type liquid crystal display device.
4. The method according to one of claims 3 and 4,
Wherein the quarter wave plate (QWP) has a phase retardation value (Rin) of 140 ± 25 nm on the surface thereof and Nz (Rth / Rin), which is a ratio of the retardation value in the thickness direction to the retardation value in the plane direction, Type liquid crystal display device.
4. The method according to one of claims 3 and 4,
The 1/2 wave plate (HWP) has a phase retardation value (Rin) of 270 ± 50 nm on the surface, and Nz (Rth / Rin), which is a ratio of the retardation value in the thickness direction to the retardation value in the plane direction, Type liquid crystal display device.
The method according to claim 1,
Wherein the first and second TAC films are disposed on both sides of the first polarizing layer.
The method according to claim 1,
And the third and fourth TAC films are positioned on one side of the first and second retardation layers facing the air layer.
The method according to claim 1,
Wherein the touch panel includes an upper electrode and a lower electrode spaced apart from the upper electrode by a predetermined distance.
10. The method of claim 9,
Wherein the upper electrode is formed on an upper substrate and the lower electrode is formed on a lower substrate facing the upper substrate.
10. The method of claim 9,
Wherein the upper electrode is formed on one surface of the touch substrate and the lower electrode is formed on the other surface of the touch substrate.
The method according to claim 1,
In the liquid crystal panel,
A first substrate including a thin film transistor, a gate wiring, a data wiring and a pixel electrode;
A second substrate including a black matrix layer, a color filter layer, and a common electrode, the second substrate being opposed to the first substrate;
And a liquid crystal layer interposed between the first substrate and the second substrate.
The method according to claim 1,
In the liquid crystal panel,
A first substrate including a thin film transistor, a gate wiring, a data wiring, a pixel electrode, and a common electrode;
A second substrate including a black matrix layer and a color filter layer, the second substrate being opposed to the first substrate;
And a liquid crystal layer interposed between the first substrate and the second substrate.

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