WO2016047990A2 - Touch sensing electrode integrally formed with polarizing plate, display device comprising same, and manufacturing method therefor - Google Patents

Abstract

The present invention relates to a touch sensing electrode integrally formed with a polarizing plate, a display device comprising the same, and a manufacturing method therefor. The touch sensing electrode integrally formed with a polarizing plate according to the present invention comprises: a touch sensing electrode which can be folded and unfolded with respect to a bending axis; a retardation film which is provided on the touch sensing electrode and has a slow axis formed thereon so as to make a tilt angle with respect to the bending axis; and a polarizing plate provided on the retardation film.

Description

Polarizing plate integrated touch sensing electrode and display device comprising same, and manufacturing method thereof

The present invention relates to a polarizing plate integrated touch sensing electrode, a display device including the same, and a manufacturing method thereof, and more particularly, to a polarizing plate integrated touch sensing electrode applicable to a flexible display or a foldable display. The present invention relates to a display device including the same, and a manufacturing method thereof.

With the recent rapid development of semiconductor technology, the demand for display devices that are more compact and lighter and have improved performance is exploding.

BACKGROUND Electronic displays for visually delivering information have appeared in various forms according to the trend of informatization, and recently, development of displays requiring portability due to the development of portable communication has emerged strongly.

The display device has been changed from a CRT type to a liquid crystal display (LCD), a plasma display panel (PDP), an organic light emitting diode (OLED), or the like.

In recent years, studies on flexible displays that can be made thinner, lighter, and more flexible than conventional panels, or foldable displays that can be folded and unfolded based on a bending axis by using a polymer film instead of a glass substrate It is actively underway.

However, the currently developed foldable display (that is, the foldable display according to the prior art) is reduced in anti-reflection performance in the bent portion is formed when the bending axis is folded relative to the bending portion and the non-bent portion, Accordingly, there is a problem that the visibility of the bent portion is lowered and the performance of the display as a whole decreases.

The present invention is to solve the above problems, an object of the present invention is to provide a polarizing plate integrated touch sensing electrode that can improve visibility by maintaining the antireflection performance of the bent portion and the non-bent portion in the foldable display and the same It is to provide a display device and a manufacturing method comprising the same.

Another object of the present invention is to provide a polarizing plate-integrated touch sensing electrode having a slow axis of a retardation film formed to have a bending axis and an inclination angle of a foldable display, a display device including the same, and a manufacturing method thereof.

For the above purpose, the polarizing plate-integrated touch sensing electrode of one embodiment of the present invention, the touch sensing electrode capable of folding and unfolding based on the bending axis; A retardation film provided on the touch sensing electrode and having a slow axis formed to have an inclination angle with the bending axis; And a polarizing plate provided on the retardation film.

The inclination angle is preferably 40 ° to 50 °, more preferably 45 °.

And the thickness of the said retardation film becomes like this. Preferably it is 100 micrometers or less, More preferably, it is 50 micrometers or less.

In addition, it is preferable that the retardation film is a reverse wavelength dispersibility having a low refractive index for short wavelengths and a high refractive index for long wavelengths.

In addition, when the polarizing plate-integrated touch sensing electrode is folded based on the bending axis, the difference in phase difference between the bent portion where the bend is formed and the non-bending portion that is not formed is preferably 10 nm or less, preferably 5 nm or less.

On the other hand, the manufacturing method of the polarizing plate integrated touch sensing electrode of one embodiment of the present invention includes the steps of: laminating a phase difference film on a substrate; Forming a touch sensing electrode on the retardation film, the touch sensing electrode being able to be folded and unfolded based on a bending axis; Delaminating the retardation film on which the touch sensing electrode is formed on the substrate; And attaching a polarizing plate on the retardation film on which the touch sensing electrode is formed, wherein the slow axis of the retardation film has an inclination angle with the bending axis.

In addition, a method of manufacturing a polarizing plate-integrated touch sensing electrode according to another aspect of the present invention includes forming a touch sensing electrode that can be folded and unfolded based on a bending axis on a substrate; Transferring the touch sensing electrode onto a retardation film; And attaching a polarizing plate on the retardation film on which the touch sensing electrode is formed, wherein the slow axis of the retardation film has an inclination angle with the bending axis.

Preferably, the forming of the touch sensing electrode includes photolithography of the touch sensing electrode such that the longitudinal direction and the bending axis of the substrate have an inclination angle on the rectangular substrate.

The polarizing plate-integrated touch sensing electrode according to the present invention may improve visibility by maintaining antireflection performance of the bent portion and the non-bended portion in the foldable display at the same level, thereby improving display performance.

In addition, the polarizing plate-integrated touch sensing electrode according to the present invention can improve the anti-reflection performance of the bent portion without additional processes or costs by forming a slow axis of the retardation film to have an inclination angle with the bend axis of the foldable display.

1 is a block diagram of a polarizer integrated touch sensing electrode according to an embodiment of the present invention.

2 is a view illustrating a state in which a polarizer integrated touch sensing electrode is unfolded.

3 is a view illustrating a state in which a polarizer integrated touch sensing electrode is folded.

4 is a view illustrating a polarizer integrated touch sensing electrode having a polarizer absorption axis parallel to a bending axis and a slow axis of a retardation film having an inclination angle of 45 °.

FIG. 5 illustrates a polarizer integrated touch sensing electrode having a polarizer absorption axis perpendicular to a bending axis and a slow axis of a retardation film having an inclination angle of 45 °.

6 is a view showing a polarizing plate-integrated touch sensing electrode in which the polarizer absorption axis forms an inclination angle of 45 ° with respect to the bending axis and the slow axis of the retardation film is parallel.

FIG. 7 illustrates a polarizer integrated touch sensing electrode having a 45 ° inclination angle of the polarizer absorption axis and a slow axis of the retardation film perpendicular to the bending axis.

8 is a view schematically illustrating a method of manufacturing a polarizer integrated touch sensing electrode according to the prior art by applying the manufacturing method according to the prior art.

9 is a view schematically illustrating a method of manufacturing a polarizing plate integrated touch sensing electrode according to an embodiment of the present invention by applying a manufacturing method according to the prior art.

10 is a view schematically illustrating a method of manufacturing a polarizing plate integrated touch sensing electrode according to an embodiment of the present invention by applying the manufacturing method according to the present invention.

Hereinafter, with reference to the accompanying drawings will be described the present invention in more detail.

1 is a block diagram of a polarizer integrated touch sensing electrode according to an embodiment of the present invention.

Referring to FIG. 1, the polarizing plate-integrated touch sensing electrode according to the exemplary embodiment of the present invention may include a phase difference film 240, an adhesive 230, and a touch sensing electrode 100 capable of sensing a human touch. The polarizer 220 and the protective film 210 are provided.

The touch sensing electrode 100 includes, for example, a first sensing pattern for sensing the position of the x-coordinate and a second sensing pattern for sensing the position of the y-coordinate on the display, as disclosed in Korean Patent Publication No. 10-1401050. When a touch is made by a person or the like, the touched position on the display can be detected by transmitting the x coordinate and the y coordinate to a control unit (microprocessor) or the like. In the case of the present invention, the touch sensing electrode 100 may use various known methods in addition to the above-described method.

The polarizing plate 200 may be composed of a polarizer 220 and a protective film 210 as illustrated in FIG. 1, wherein the retardation film 240 is attached to the polarizer 220 through the pressure-sensitive adhesive 230. This can be formed. For reference, in the case of the present invention, a variety of known polarizing plates may be used in addition to the form shown in FIG. 1.

<Protective Film>

The protective film 210 is not particularly limited as long as the film is excellent in transparency, mechanical strength, thermal stability, moisture shielding, and isotropy.

Specifically, polyester-based resin, such as polyethylene terephthalate, polyethylene isophthalate, polybutylene terephthalate; Cellulose resins such as diacetyl cellulose and triacetyl cellulose; Polycarbonate resins; Acrylic resins such as polymethyl (meth) acrylate and polyethyl (meth) acrylate; Styrene resins such as polystyrene and acrylonitrile-styrene copolymers; Polyolefin resins such as polyethylene, polypropylene, cyclo-based or norbornene-structured polyolefins, ethylene propylene copolymers; Vinyl chloride-based resins; Polyamide resins such as nylon and aromatic polyamide; Imide resin; Polyether sulfone resin; Sulfone resins; Polyether ketone resins; Sulfided polyphenylene resins; Vinyl alcohol-based resins; Vinylidene chloride-based resins; Vinyl butyral resin; Allyl resins; Polyoxymethylene resin; And films composed of thermoplastic resins such as epoxy resins, and the like, and films composed of blends of the above thermoplastic resins may also be used. Moreover, you may use the film which consists of thermosetting resins or ultraviolet curable resins, such as a (meth) acrylic-type, urethane type, an epoxy type, and a silicone type. Among these, a cellulose-based film having a surface saponified by saponification with alkali or the like, such as a TAC (Triacetyl cellulose; triacetyl cellulose) film, is preferably considered in consideration of polarization characteristics or durability. In addition, the protective film may have a function of the optical compensation layer.

<Polarizer>

The polarizer 220 is an optical film that serves to change the incident natural light into a desired single polarization state (linear polarization state), and is not particularly limited as long as it can generally perform a polarization function in the art.

For example, there is a fine pattern of conductive gratings with a polarizing function on a polarizer or a transparent substrate manufactured by dyeing iodine or dichroic dye on a polyvinyl alcohol (PVA) film and stretching it in a predetermined direction. A thin polarizing plate, etc. coated with an insulating layer may be used.

Polyvinyl alcohol-type resin which comprises a polarizer can be manufactured by saponifying polyvinyl acetate type resin. Examples of the polyvinyl acetate-based resin include copolymers with other monomers copolymerizable with vinyl acetate, in addition to polyvinyl acetate, which is a homopolymer of vinyl acetate. Specific examples of the other monomer copolymerizable with vinyl acetate include unsaturated carboxylic acids, unsaturated sulfonic acids, olefins, vinyl ethers, acrylamides having an ammonium group, and the like. In addition, the polyvinyl alcohol-based resin may be modified, for example, polyvinyl formal or polyvinyl acetal modified with aldehydes may be used. The degree of saponification of the polyvinyl alcohol-based resin may be 85 to 100 mol%, preferably 98 mol% or more. In addition, the degree of polymerization of the polyvinyl alcohol-based resin is usually 1,000 to 10,000, preferably 1,500 to 5,000.

This polyvinyl alcohol-based resin is formed into a film and used as a polarizer. The film forming method of the polyvinyl alcohol-based resin is not particularly limited, and various known methods can be used. The film thickness of the polyvinyl alcohol-based resin is not particularly limited, and may be, for example, 10 to 150 μm.

<Adhesive>

The adhesive 230 serves to adhere the polarizer 220 to the retardation film 240, and various adhesives in a known form, such as a pressure sensitive adhesive (PSA) film, may be used.

<Phase difference film>

The retardation film 240 can be obtained, for example, by orienting the polymer film in the uniaxial direction, in the biaxial direction, or in other suitable methods.

The kind of the polymer compound constituting the polymer film is not particularly limited. In this case, it is preferable to use a high transparency polymer compound suitable for use in a liquid crystal display device, such a compound is a polycarbonate compound, a polyester compound, a polysulfone compound, a polyether sulfone compound, a polystyrene compound And polyolefin compounds, polyvinyl alcohol compounds, cellulose acetate compounds, polymethyl methacrylate compounds, polyvinyl chloride compounds, polyacrylate polyvinyl chloride compounds, polyamide chloride polyvinyl chloride compounds, and the like.

In addition, the retardation film may be made of nematic or smectic, preferably nematic liquid crystal material, which is polymerizable by in situ polymerization. As a specific example, it can be prepared by coating a polymerizable liquid crystal material on a substrate, oriented in a planar orientation and subsequently polymerizing by exposure to heat or ultraviolet light.

According to a preferred embodiment of the present invention, the retardation film 240 is an ellipse of the linearly polarized light by the polarizer 220 using a reverse wavelength dispersible lambda / 4 phase difference film having a low refractive index for short wavelengths and a high refractive index for long wavelengths Try to have circular polarization, not shape.

2 and 3 illustrate a curved portion in which a curvature may be generated and a non-curved portion in which no curvature is generated when the polarizing plate integrated touch sensing electrode according to the present invention is used in a foldable display device. For reference, FIG. 2 is a view illustrating an unfolded state in which the polarizing plate integrated touch sensing electrode is unfolded, and the curved portion and the non-curved portion show no curved state. 3 is a view illustrating a state in which a polarizing plate-integrated touch sensing electrode is folded, and a bent portion is folded based on a bending axis to show a state in which bending occurs.

Hereinafter, a polarizer integrated touch sensing electrode according to the present invention will be described in more detail with reference to FIGS. 4 to 7.

Example 1

The structure of the polarizing plate to which the retardation film is attached is the same as that of the embodiment of FIG. 1, and a protective film constituting the polarizing plate is a 25 μm Triacetyl cellulose (TAC) film, and the polarizer is a 22 μm polyvinyl alcohol (PVA) film. Was used. The pressure sensitive adhesive was a PSA (Pressure sensitive adhesive) film having a thickness of 15 µm and a 50 µm lambda / 4 phase difference film (trade name WRS film) having a reverse wavelength dispersion.

The polarizer absorption axis was parallel to the bending axis and the slow axis of the retardation film was formed to have a 45 ° inclination angle with respect to the bending axis (see FIG. 4).

Example 2

The structure and material of the polarizing plate with retardation film are the same as in Example 1.

However, the polarizer absorption axis is perpendicular to the bending axis and the slow axis of the retardation film is different from the point formed to form a 45 ° inclination angle with respect to the bending axis (see FIG. 5).

Comparative Example 1

The structure and material of the polarizing plate with retardation film are the same as in Example 1.

However, the polarizer absorption axis forms an inclination angle of 45 ° with respect to the bending axis, and the slow axis of the retardation film is different from the point formed in parallel with the bending axis (see FIG. 6).

Comparative Example 2

The structure and material of the polarizing plate with retardation film are the same as in Example 1.

However, the polarizer absorption axis forms an inclination angle of 45 ° with respect to the bending axis, and the slow axis of the retardation film is different from the point formed perpendicular to the bending axis (see FIG. 7).

Experimental Example

Table 1 shows the results of measuring the front phase difference Ro and the color difference ΔEab of the bent portion and the non-bended portion, respectively in Examples 1 and 2 (invention) and Comparative Examples 1 and 2.

TABLE 1

Referring to the measurement results, the phase difference of the non-bending portion is relatively the same in Examples 1, 2 and Comparative Examples 1, 2, but the phase difference of the bending portion is smaller as the slow axis of the retardation film is parallel to the bending axis (see Comparative Example 1). Appear and become vertical (see Comparative Example 2), and appear larger, especially when the slow axis of the retardation film forms an inclination angle of 45 ° with respect to the bending axis (see Examples 1 and 2). It can be seen. In this case, the difference in phase difference between the bent portion and the non-bended portion is preferably 5 nm or less, and should be at least 10 nm or less.

If the difference between the phase difference between the curved portion and the non-flex portion is greater than 10 nm, the difference in reflection color may occur. When the color difference ΔEab of the curved portion and the non-flex portion exceeds 3, the human body may feel it. For reference, there are ΔE * ab and ΔE * uv as the definition of Uniform Color Space established in 1976. Among them, ΔE * ab is widely used.If ΔE * ab is 3 or less, people do not feel color difference. It is not used as a standard.

Therefore, when the slow axis of the retardation film has an inclination angle of 40 ° to 50 ° with respect to the bend axis, and preferably at 45 ° inclination, the difference in phase difference between the bent portion and the non-bending portion is reduced, thereby substantially the same performance (eg antireflection). Function), thereby improving visibility and improving performance of the foldable display.

For reference, Table 2 shows the front phase difference Ro and the color difference ΔEab when the inclination angles of the slow axis and the bending axis of the retardation film are 40 °, 45 °, and 50 °, respectively, based on the second embodiment. ) Shows the result of the measurement.

TABLE 2

On the other hand, as the thickness of the retardation film is thinner, the difference in phase difference between the bent portion and the non-bending portion is smaller. In the present invention, the thickness of the retardation film is preferably 100 μm or less, and more preferably 50 μm or less. . For reference, Table 3 shows the results of measuring the front phase difference Ro of the bent portion and the non-bended portion when the thickness of the retardation film is 50 μm, 70 μm, and 100 μm, respectively.

 TABLE 3

Hereinafter, a method of manufacturing a polarizer integrated touch sensing electrode according to the present invention will be described with reference to FIGS. 8 to 10.

First, FIG. 8 schematically illustrates a method of manufacturing a polarizer integrated touch sensing electrode according to the prior art by applying the manufacturing method according to the prior art.

Referring to FIG. 8, in the related art, after the plurality of touch sensing electrodes 100 are formed on a transparent substrate by using photolithography, the retardation film 240 and the polarizing plate are formed thereon. 200) was laminated to manufacture a polarizer integrated touch sensing electrode.

As a specific example, referring to a touch sensor manufacturing process using 5.5G (1,300mm × 1500mm) glass, a plurality of rectangular touch sensing using photolithography technology is performed on 1,300mm × 1500mm glass. In this case, in order to increase the chamfering rate, the length direction of the touch sensing electrode is formed to be the same as the length direction of the glass, and thus the bending axis of the touch sensing electrode is also formed to be the same as the length direction of the glass. Then, the retardation film 240 having the same shape and size (1,300mm × 1,500mm) as the glass is gradually laminated on the glass on which the touch sensing electrode is formed, and the polarizing plate 200 is attached thereon, thereby bending the touch sensing electrode. A polarizing plate-integrated touch sensing electrode having substantially the same axis as the slow axis of the retardation film was produced. For reference, in this case, the chamfering ratio of the glass on which the touch sensing electrode is formed is about 99%, and the chamfering ratio of the retardation film is about 99%. However, as can be seen in the experimental results of the above-described Examples 1 and 2 and Comparative Examples 1 and 2, there is a problem in that the optical characteristics are lowered after bending.

Meanwhile, in order to manufacture a polarizing plate-integrated touch sensing electrode according to the present invention, the bending axis of the touch sensing electrode and the slow axis of the retardation film should be manufactured to form an inclination angle (40 ° to 50 °, preferably 45 °). 9 schematically illustrates a method of manufacturing a polarizing plate-integrated touch sensing electrode according to an embodiment of the present invention by applying the manufacturing method according to the prior art.

In the above-described touch sensor manufacturing process using 5.5G (1,300mm × 1500mm) glass, a plurality of square touch sensing electrodes using photolithography technology on 1,300mm × 1500mm glass In this case, in order to increase the chamfering rate, the longitudinal direction of the touch sensing electrode is formed to be the same as the longitudinal direction of the glass, and thus the bending axis of the touch sensing electrode is also formed to be the same as the longitudinal direction of the glass. Meanwhile, in order for the bending axis of the touch sensing electrode and the slow axis of the retardation film to form an inclination angle (40 ° to 50 °, preferably 45 °), the phase difference film 240 forms an inclination angle on the glass on which the touch sensing electrode is formed. It must be layered, so a 1,980 mm wide retardation film must be used to cover the entire 1,300 mm x 1500 mm glass. However, the 1,980 mm wide retardation film is not currently in mass production, and even when using a wide retardation film of 1,980 mm, the chamfering rate is lowered to about 47% to increase the cost.

In order to solve this problem, the manufacturing method according to an embodiment of the present invention is formed so that the bending axis has an inclination angle from the beginning in the process of photolithography the touch sensing electrode on the transparent substrate. In this regard, FIG. 10 schematically illustrates a method of manufacturing a polarizing plate integrated touch sensing electrode according to an embodiment of the present invention by applying the manufacturing method according to the present invention.

Referring to FIG. 10, first, as a first method, the retardation film 240 is laminated on a transparent substrate, and a plurality of touch sensing electrodes 100 are laminated thereon using photolithography technology. In this case, it is laminated so that the slow axis of the retardation film is the same as the longitudinal direction of the rectangular transparent substrate, and the bending axis of the touch sensing electrode is inclined angle (40 ° to 50 °, preferably 45 °) of the rectangular transparent substrate. To have). Thereafter, when the retardation film on which the touch sensing electrode is formed is delaminated on the transparent substrate, and the polarizing plate 200 is attached thereon in the longitudinal direction of the rectangular transparent substrate, the bending axis of the touch sensing electrode and the slow axis of the retardation film The polarizing plate-integrated touch sensing electrode forming this inclination angle can be manufactured.

Meanwhile, as a second method, a plurality of touch sensing electrodes 100 are formed on the transparent substrate by using photolithography technology, in which case the longitudinal direction of the rectangular transparent substrate and the bending axis of the touch sensing electrodes are inclined angles ( 40 ° to 50 °, preferably 45 °). The touch sensing electrode is transferred to the retardation film. In this case, the slow axis of the retardation film and the bending axis of the touch sensing electrode are formed to have an inclination angle. Thereafter, when the polarizing plate 200 is attached to the retardation film on which the touch sensing electrode is formed, the polarizing plate integrated touch sensing electrode may be manufactured in which the bending axis of the touch sensing electrode and the slow axis of the retardation film form an inclination angle.

In the above-described touch sensor manufacturing process using 5.5G (1,300mm × 1500mm) glass, a plurality of rectangular touch sensing electrodes using photolithography technology on 1,300mm × 1500mm glass In this case, a mask is formed such that the longitudinal direction of the rectangular glass and the bending axis of the touch sensing electrode have an inclination angle (40 ° to 50 °, preferably 45 °). do. On the other hand, a retardation film 240 having substantially the same shape and size (1300 mm × 1500 mm) as the glass is laminated to the glass before photolithography to be integrated with the touch sensing electrode (see the first method) or after the photolithography touch sensing electrode. And a polarizing plate attached thereto, a polarizing plate-integrated touch sensing electrode having an inclination angle between the bending axis of the touch sensing electrode and the slow axis of the retardation film is manufactured. For reference, in this case, the chamfering ratio (touch sensing electrode utilization rate on the mask) of the glass on which the touch sensing electrode is formed is 80% or more, and the chamfering ratio of the retardation film is about 99%.

The present invention has been described in detail above with reference to the embodiments of the present invention. For those of ordinary skill in the art, these specific techniques are merely preferred embodiments, and the scope of the present invention is limited thereto. It is obvious that it is not.

Therefore, those of ordinary skill in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above contents, and thus the practical scope of the present invention is defined by the appended claims. It will be defined by his equivalent.

[Description of the code]

100: touch sensing electrode

200: polarizer

210: protective film

220: polarizer

230: adhesive

240: retardation film

Claims (14)

In the polarizing plate integrated touch sensing electrode, A touch sensing electrode capable of folding and unfolding based on a bending axis; A retardation film provided on the touch sensing electrode and having a slow axis formed to have an inclination angle with the bending axis; And And a polarizing plate provided on the retardation film. The method of claim 1, The inclination angle of the polarizing plate integrated touch sensing electrode, characterized in that 40 ° to 50 °. The method of claim 2, And the inclination angle is 45 °. The method according to any one of claims 1 to 3, The thickness of the retardation film is a polarizing plate integrated touch sensing electrode, characterized in that less than 100㎛. The method of claim 4, wherein The thickness of the retardation film is 50㎛ or less, characterized in that the polarizing plate integrated touch sensing electrode. The method according to any one of claims 1 to 3, The retardation film is a polarization plate-integrated touch sensing electrode, characterized in that the reverse wavelength dispersion of the low refractive index for the short wavelength and the high refractive index for the long wavelength. The method according to any one of claims 1 to 3, When the polarizing plate-integrated touch sensing electrode is folded with respect to the bending axis, the difference in phase difference between the bent portion is formed and the non-curved portion is not formed, the polarizing plate integrated touch sensing electrode, characterized in that 10nm or less. The method of claim 7, wherein When the polarizing plate-integrated touch sensing electrode is folded based on the bending axis, the difference in phase difference between the bent portion where the bend is formed and the non-bent portion where the bend is not formed is 5 nm or less. A display device comprising the polarizing plate integrated touch sensing electrode according to any one of claims 1 to 3. As a manufacturing method of a polarizing plate integrated touch sensing electrode, Laminating a retardation film on a substrate; Forming a touch sensing electrode on the retardation film, the touch sensing electrode being able to be folded and unfolded based on a bending axis; Delaminating the retardation film on which the touch sensing electrode is formed on the substrate; And Attaching a polarizing plate on the retardation film in which the touch sensing electrode is formed, And a slow axis of the retardation film has an inclination angle with the bend axis. As a manufacturing method of a polarizing plate integrated touch sensing electrode, Forming a touch sensing electrode on a substrate, the touch sensing electrode being able to be folded and unfolded based on a bending axis; Transferring the touch sensing electrode onto a retardation film; And Attaching a polarizing plate on the retardation film in which the touch sensing electrode is formed, And a slow axis of the retardation film has an inclination angle with the bend axis. The method of claim 10, wherein the forming of the touch sensing electrode is performed. And photolithography the touch sensing electrode such that a longitudinal direction of the substrate and the bending axis have an inclination angle on the rectangular substrate. The method according to claim 10 or 11, wherein The inclination angle is a manufacturing method of the polarizing plate-integrated touch sensing electrode, characterized in that 40 ° to 50 °. The method of claim 13, The inclination angle is 45 ° manufacturing method of the polarizing plate-integrated touch sensing electrode, characterized in that.

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