WO2015093855A1

WO2015093855A1 - Composition for refractive index matching, and touch screen substrate and display device manufactured using same

Info

Publication number: WO2015093855A1
Application number: PCT/KR2014/012503
Authority: WO
Inventors: 이은미; 박현욱; 함흥우
Original assignee: 주식회사 엘엠에스
Priority date: 2013-12-20
Filing date: 2014-12-17
Publication date: 2015-06-25
Also published as: KR101521775B1

Abstract

A composition for refractive index matching is disclosed. The composition for refractive index matching comprises a fluorine-containing diacrylate monomer, a photoinitiator and inorganic particles. The inorganic particles consist of oxides comprising one or more selected from zirconium (Zr), aluminum (Al) and chromium (Cr), or consist of a core formed of oxides comprising titanium (Ti) and barium (Ba) and a shell formed of oxides comprising at least one selected from Zr, Al and Cr.

Description

Refractive index matching composition, touch screen substrate and display device manufactured using the same

The present invention relates to a composition for refractive index matching, a touch screen substrate manufactured using the same, and a display device including the touch screen substrate.

The touch screen panel is an input device for inputting a user's command by selecting instructions displayed on a screen such as a display device with a human hand or an object. The touch screen panel is provided at the front face of the display to sense a user's touch point and generate a corresponding electrical signal. Since the touch screen panel can replace separate input devices such as a keyboard and a mouse, its use range is gradually expanding.

Such a touch screen panel is generally provided with a transparent electrode and a transparent electrode pattern formed on the transparent substrate in order to show the image of the display device to the user as it is, the refractive index of the transparent substrate and the refractive index of the transparent electrode pattern Since the difference is large, a display defect in which the transparent electrode pattern is visually recognized by the user may occur.

As such, various methods have been studied to solve display defects caused by the difference in refractive index between the transparent substrate and the transparent electrode pattern.

Accordingly, the technical problem of the present invention was conceived in this respect, and an object of the present invention is to provide a refractive index matching composition for solving a display defect caused by a difference in refractive index between a transparent substrate and a transparent electrode pattern.

Another object of the present invention is to provide a touch screen substrate having a refractive index compensation layer formed of the composition.

Another object of the present invention is to provide a display device having the touch screen substrate.

The composition for refractive index matching according to an embodiment of the present invention includes a diacrylate monomer containing fluorene, a photoinitiator and inorganic particles.

In one embodiment, the inorganic particles may be made of an oxide containing one or more selected from zirconium (Zr), aluminum (Al) and chromium (Cr).

In one embodiment, the inorganic particles may be formed of a core made of an oxide including titanium and barium, and a shell covering the core and an oxide including at least one selected from zirconium, aluminum, and chromium.

In one embodiment, the diacrylate monomer may include a compound represented by the following formula (1).

[Formula 1]

In Formula 1, Y ₁ , Y ₂ , Z ₁ and Z ₂ each independently represent hydrogen or an alkyl group having 1 to 3 carbon atoms, m and n each represent an integer of 1 to 9, the sum of m and n is 2 to 10.

In one embodiment, the content of the diacrylate monomer, the photoinitiator and the inorganic particles with respect to the total weight of the composition may be 5 to 40% by weight, 0.1 to 5% by weight and 50 to 80% by weight, respectively.

In one embodiment, the refractive index matching composition may further include a monofunctional acrylate monomer. In this case, the content of the acrylate may be 1 to 20% by weight based on the total weight of the composition.

In one embodiment, the liquid refractive index of the refractive index matching composition may be 1.65 to 2.18.

In one embodiment, the refractive index matching composition may further comprise a UV absorber. In this case, the content of the ultraviolet absorbent based on the total weight of the composition may be 0.1 to 5% by weight.

The touch screen substrate according to the embodiment of the present invention includes a base substrate, a transparent electrode pattern, and a refractive index compensation layer. The transparent electrode pattern is formed on one surface of the base substrate. The refractive index compensation layer is positioned on one surface of the base substrate on which the transparent electrode pattern is formed to cover an upper surface of the transparent electrode pattern and one surface of the base substrate exposed by the transparent electrode pattern, and inorganic particles are dispersed therein. .

In one embodiment, the solid-state refractive index of the refractive index compensation layer may be 1.67 to 2.2.

In one embodiment, the touch screen substrate further comprises a driving unit electrically connected to the transparent electrode pattern to apply a current to the transparent electrode pattern, one surface of the base substrate is formed with the transparent electrode pattern is a user's touch And a peripheral area where the touch unit is detected and the driving unit is formed adjacent to the touch area, where the user's touch is not detected. The refractive index compensation layer may expose the peripheral area of one surface of the base substrate. have.

The touch screen substrate according to the embodiment of the present invention includes a base substrate, a refractive index compensation layer, and a transparent electrode pattern. The refractive index compensation layer is formed on one surface of the base substrate, and inorganic particles are dispersed therein. The transparent electrode pattern is formed on the refractive index compensation layer.

In one embodiment, the inorganic particles may be formed of a core made of an oxide including titanium and barium, and a shell covering the core and an oxide including at least one selected from zirconium, aluminum, and chromium. In one embodiment, the touch screen substrate further comprises a driving unit electrically connected to the transparent electrode pattern to apply a current to the transparent electrode pattern, one surface of the base substrate is formed with the transparent electrode pattern is a user's touch And a touch area that is detected to be adjacent to the touch area and the driving area is formed to detect the user's touch, and the driving part may be positioned above the refractive index compensation layer formed in the peripheral area. .

A display device according to an exemplary embodiment of the present invention includes a display panel and a touch screen panel positioned on the display panel. The display panel includes a transparent electrode pattern and a refractive index compensation layer. The refractive index compensation layer covers the top and side surfaces of the transparent electrode pattern, and inorganic particles are dispersed therein.

A display device according to an exemplary embodiment of the present invention includes a display panel and a touch screen panel positioned on the display panel. The display panel includes a refractive index compensation layer and a transparent electrode pattern. In the refractive index compensation layer, inorganic particles are dispersed therein. The transparent electrode pattern is formed on the surface of the refractive index compensation layer.

The refractive index matching composition according to the present invention is a single-structured inorganic particles containing at least one selected from zirconium (Zr), aluminum (Al) and chromium (Cr) or a core made of an oxide containing titanium and barium and the core coating And inorganic particles having a shell made of an oxide including at least one selected from zirconium, aluminum, and chromium, and thus have a high liquid refractive index. As a result, the refractive index compensation layer of the touch screen substrate is used to form a touch of a user. The display defect due to the difference in refractive index such that the transparent electrode pattern for sensing is visible to the user can be reduced.

1 is a cross-sectional view illustrating a touch screen substrate according to an embodiment of the present invention.

2 and 3 are cross-sectional views illustrating a touch screen substrate according to another embodiment of the present invention.

4 is a cross-sectional view illustrating a touch screen substrate according to another embodiment of the present invention.

5 is a cross-sectional view illustrating a touch screen substrate according to another embodiment of the present invention.

6 is a cross-sectional view illustrating a touch screen substrate according to another embodiment of the present invention.

FIG. 7 is a cross-sectional view illustrating an embodiment of a driver applied to a touch screen substrate according to an exemplary embodiment of the present invention. FIG.

8 is a cross-sectional view for describing another embodiment of a driving unit applied to a touch screen substrate according to an embodiment of the present invention.

9 is a cross-sectional view illustrating a display device according to an exemplary embodiment of the present invention.

10 is a cross-sectional view illustrating a display device according to another exemplary embodiment of the present invention.

11 is a cross-sectional view illustrating a display device according to still another embodiment of the present invention.

12 is a cross-sectional view illustrating a display device according to still another embodiment of the present invention.

13 is a cross-sectional view illustrating a display device according to still another embodiment of the present invention.

14 is a cross-sectional view illustrating a display device according to still another embodiment of the present invention.

15 is a cross-sectional view illustrating a display device according to still another embodiment of the present invention.

16 and 17 are photographs taken by using a digital camera in a plane from the top of Sample 1 and Sample 2 after irradiating light from the bottom of Sample 1 and Sample 2 in the dark state.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. As the inventive concept allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the text. However, this is not intended to limit the present invention to a specific disclosed form, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements. In the accompanying drawings, the dimensions of the structures are shown to be enlarged or reduced than actual for clarity of the invention.

Terms such as "first and second" may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprises" or "having" are intended to indicate that there is a feature, step, operation, component, part, or combination thereof described on the specification, and one or more other features or steps. It is to be understood that the present invention does not exclude, in advance, the possibility of the presence or the addition of an operation, a component, a part, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

<굴절률 매칭용 조성물><Refractive Index Matching Composition>

The refractive index matching composition according to an embodiment of the present invention can be used to form a refractive index compensation layer that can reduce display defects due to a refractive index difference such that a transparent electrode pattern formed on a transparent substrate such as a touch screen substrate is visually recognized by a user. have.

The refractive index matching composition includes a diacrylate monomer containing fluorene, a monofunctional acrylate monomer, inorganic particles, and a photoinitiator.

The diacrylate monomer may include fluorene as a resin component for forming a refractive index compensation layer for refractive index matching. The diacrylate monomer may be included in about 5 to 40% by weight based on the total weight of the composition. When the content of the diacrylate monomer is less than about 5% by weight, a defect may occur in the formation of the refractive index compensation layer, and when the content of the diacrylate monomer exceeds about 40% by weight, shrinkage of the refractive index compensation layer This may occur badly and the uniformity of the refractive index compensation layer may be reduced.

In one embodiment of the present invention, the diacrylate monomer may include a compound represented by the following formula (1).

[Formula 1]

In Formula 1, Y ₁ , Y ₂ , Z ₁ and Z ₂ each independently represent hydrogen or an alkyl group having 1 to 3 carbon atoms, m and n independently represent an integer of 1 to 9, and m and n The sum may be about 2 to 10.

The monofunctional acrylate monomer is a component that connects the inorganic particles and the diacrylate monomer, and improves the fluidity of the refractive index matching composition according to an embodiment of the present invention. The monofunctional acrylate monomer may be copolymerized with the diacrylate monomer and may be cured by ultraviolet rays. The monofunctional acrylate monomer may be included in about 1 to 20% by weight based on the total weight of the composition. When the content of the monofunctional acrylate monomer exceeds 20% by weight, the refractive index of the refractive index compensation layer formed by using the refractive index matching composition according to an embodiment of the present invention may cause a problem that the curing performance is lowered have.

In one embodiment of the present invention, the monofunctional acrylate monomer is 2-phenoxy ethyl acrylate (2-Phenoxy ethyl Acrylate), phenylthioethyl acrylate (Phenylthio ethyl Acrylate), o-phenyl phenol ethoxyacryl O-phenyl phenol ethoxy Acrylate, Octyl Acrylate, Decyl Acrylate, Stearyl Acrylate, Tetrahydrofurfuryl Acrylate, 2 Ethoxy Ethyl Ethoxy ethoxy ethyl Acrylate, Benzyl Acrylate, Hexanediol Diacrylate, Butanediol Diacrylate, N-vinyl pyrolidone Can be used. Preferably, the monofunctional acrylate monomer is 2-phenoxy ethyl acrylate (2-Phenoxy ethyl Acrylate), phenylthioethyl acrylate (Phenylthio ethyl Acrylate), o-phenyl phenol ethoxy acrylate (o-phenyl phenol ethoxy Acrylate) and the like can be used.

The inorganic particles may be included in an amount of about 50 to 80 wt% based on the total weight of the composition as a component for determining the refractive index of the composition. When the content of the inorganic particles is less than 50% by weight, the refractive index of the refractive index compensation layer formed by using the refractive index matching composition according to an embodiment of the present invention may be difficult to effectively prevent the transparent electrode pattern from being recognized. When the content of the inorganic particles exceeds 80% by weight, the refractive index matching composition according to an embodiment of the present invention may not be able to form a refractive index compensation layer or may cause problems such as cracks in the formed refractive index compensation layer. have.

In one embodiment of the present invention, the inorganic particles may have a single structure or a core shell structure. The single structured inorganic particles may be formed of an oxide including one or more selected from zirconium (Zr), aluminum (Al), and chromium (Cr). Meanwhile, the core-shell structured inorganic particles cover a core made of an oxide including titanium (Ti) and barium (Ba) and at least a portion of the core, and include zirconium (Zr), aluminum (Al), and chromium (Cr). It may comprise a shell consisting of an oxide comprising at least one selected.

The size of the inorganic particles is not particularly limited as long as it does not reduce the degree of dispersion. In one example, the inorganic particles may have a diameter of about 1 to 50nm. Preferably, the inorganic particles may have a diameter of about 10 to 30nm. Wherein the diameter of the inorganic particles is the linear distance between two points on the surface of the particle, the length of the imaginary straight line connecting the two points while passing through the particle's center of gravity. However, when the linear distance varies depending on the position of two points such as the presence of bending on the surface of the particle or the egg phenomenon, the diameter of the particle means the maximum value among the linear distances.

The diameter of the inorganic particles may be measured by transmission electron microscope (TEM) image analysis.

The photoinitiator is a material that absorbs ultraviolet light to initiate a polymerization reaction of the diacrylate monomer and the monofunctional acrylate monomer. As the photoinitiator, known photoinitiators may be used without limitation. For example, a phosphine oxide-based or formate-based photoinitiator may be used as the photoinitiator.

The photoinitiator may be included in about 0.1 to 5% by weight based on the total weight of the composition. When the content of the photoinitiator is less than 0.1% by weight, there may occur a problem that the photocuring of the composition according to an embodiment of the present invention does not sufficiently occur, and when the content of the photoinitiator exceeds 5% by weight, the photoinitiator is even after curing After a long time, the surface precipitation phenomenon of the photoinitiator may occur, or a yellowing phenomenon may occur in the refractive index compensation layer.

The refractive index matching composition according to the embodiment of the present invention may further include a ultraviolet absorber. The ultraviolet absorbent may prevent yellowing of the refractive index compensation layer generated by ultraviolet rays.

As the ultraviolet absorber, various materials may be used according to the wavelength of ultraviolet rays generated from the light source of the display panel to which the refractive index matching composition according to the exemplary embodiment of the present invention is applied. As the ultraviolet absorber, a known ultraviolet absorbent may be used without limitation. For example, the ultraviolet absorber may be oxalic analide, benzophenone, bentotriazin, Ultraviolet absorbers, such as a benzotriazole system, can be used.

The ultraviolet absorbent may be included in about 0.1 to 5% by weight based on the total weight of the composition. When the content of the ultraviolet absorber is less than 0.1% by weight, it is difficult to prevent yellowing of the refractive index compensation layer due to the small amount of ultraviolet light absorbed by the ultraviolet absorber, and when the content of the ultraviolet absorber exceeds 5% by weight, The ultraviolet absorber may absorb too much ultraviolet light and interfere with the photocuring reaction by the photoinitiator.

The refractive index matching composition according to an embodiment of the present invention may have a liquid refractive index of about 1.65 or more, for example, a liquid refractive index of about 1.65 to 2.18.

Here, the refractive index matching composition including the single structure inorganic particles may have a liquid refractive index of about 1.65 to 1.98, and the refractive index matching composition including the core shell structure inorganic particles may have a liquid refractive index of 1.68 to 2.18. .

When the liquid refractive index of the composition for refractive index matching is less than 1.65, the transparent electrode pattern formed on the transparent substrate may not be prevented from being recognized by the user. When the liquid refractive index of the refractive index matching composition is 2.18 or more, a problem may occur in that the content of the inorganic particles is too high to form a refractive index compensation layer.

The composition for refractive index matching according to the embodiment of the present invention may have a high liquid phase refractive index since it includes a single structure or core-shell structured inorganic particles. Therefore, due to the difference in refractive index between the transparent substrate and the transparent electrode pattern of the touch screen substrate, the sensing electrode may be used to form a coating film for reducing display defects such as being recognized by the user.

<터치스크린 기판><Touch Screen Board>

Referring to FIG. 1, the touch screen substrate 100 according to an embodiment of the present invention includes a base substrate 110, a refractive index compensation layer 120, and a transparent electrode pattern 130.

The base substrate 110 may be formed of a material such as glass or plastic. Examples of the plastic material include polyethylene terephthalate (PET), polycarbonate (PC), polyacrylate, polyimide, polyurethane, and the like. Preferably, the base substrate 110 may be formed of a transparent material having a solid phase refractive index of about 1.5 to 1.7.

For example, the base substrate 110 may be an upper substrate of the display panel, for example, a substrate disposed adjacent to the color filter substrate. As another example, the base substrate 110 may be a window substrate disposed to be spaced apart from the upper substrate of the display panel with the refractive index compensation layer 120 and the transparent electrode pattern 130 interposed therebetween. . As another example, the base substrate 110 may be an upper substrate of the display panel.

The refractive index compensation layer 120 is positioned on the base substrate 110. The refractive index compensation layer 120 may be formed using the refractive index matching composition according to the embodiment of the present invention described above. For example, the refractive index compensation layer 120 may be formed by coating the composition for refractive index matching on the base substrate 110 and irradiating and curing ultraviolet rays thereto.

The refractive index compensation layer 120 may have a larger refractive index than the base substrate 110. For example, the refractive index compensation layer 120 may have a solid phase refractive index of about 1.67 to 2.2 by curing the refractive index matching composition. When the liquid refractive index matching composition is cured to change into a solid phase, the solid phase refractive index is about 0.02 higher than that of the liquid refractive index. For example, the refractive index compensation layer 120 including the single structured inorganic particles may have a solid phase refractive index of about 1.67 to 2.0, and the refractive index compensation layer 120 including the coreshell structured inorganic particles may be about 1.7 to 2.2. It may have a solid phase refractive index.

Meanwhile, the refractive index compensation layer 120 may have a thickness of about 1 to 5 μm.

The transparent electrode pattern 130 may be positioned above the refractive index compensation layer 120 and may be formed of a transparent conductive material. For example, the transparent electrode pattern 130 may be formed of a transparent conductive oxide or a transparent conductive polymer. Examples of the transparent conductive oxide include indium tin oxide (ITO), tin antimony oxide (TAO), tin oxide (TO), and the like, and examples of the conductive polymer include polypyrrole (polypyrrole), polyaniline (polyaniline), polyacetylene (polyacetylene), polythiophene, polyphenylene vinylene (polyphenylene vinylene), polyphenylene sulfide, poly p-phenylene (poly p- phenylene), polyheterocycle vinylene, and the like. Preferably, the transparent electrode pattern 130 may be formed of indium tin oxide (ITO). When the transparent electrode pattern 130 is formed of indium tin oxide (ITO), the transparent electrode pattern 130 may have a refractive index of about 1.8 to 2.0.

In one embodiment, the transparent electrode pattern 130 may include a plurality of sensing electrodes arranged in a matrix form on the same plane to sense a user's touch. For example, the sensing electrodes arranged in the same row or column among the sensing electrodes may be electrically connected to each other to form a plurality of sensing electrode columns or rows. That is, when the sensing electrodes are arranged in the form of an M × N matrix, the sensing electrodes may form M sensing electrode columns or N sensing electrode rows. At this time, M and N are integers of 1 or more, and may be the same value or different values. Since the M sensing electrode columns or the N sensing electrode rows can determine only the X- or Y-coordinate of the touch point at which the user touches, in order to construct the touch screen panel, the sensing electrode columns or the rows are orthogonal to each other. A separate sensing electrode row or column is required, and the separate sensing electrode row or column may be formed on a separate substrate that is distinct from the base substrate 110.

In another embodiment, the transparent electrode pattern 130 may include a plurality of first sensing electrodes arranged in a first matrix form and a plurality of second sensing electrodes arranged in a second matrix form to sense a user's touch. It may include. The first sensing electrodes and the second sensing electrodes may be positioned on the same plane, and the second sensing electrodes may be alternately disposed with the first sensing electrodes so as not to overlap the first sensing electrodes. have. For example, in the case of the first sensing electrodes, sensing electrodes arranged in the same row may be electrically connected to each other to form a plurality of first sensing electrode columns, and in the case of the second sensing electrodes, the same row The sensing electrodes arranged in a column may be electrically connected to each other to form a plurality of second sensing electrode rows. That is, when the first and second sensing electrodes are arranged in an M × N matrix form, the first sensing electrodes may form M first sensing electrode rows, and the second sensing electrodes may be N Two sensing electrode rows can be formed. At this time, M and N are integers of 1 or more, and may be the same value or different values. The M first sensing electrode columns may determine the X-coordinate of the point where the user's touch is made, and the N second sensing electrode rows may determine the Y-coordinate of the point where the user's touch is made.

Each of the sensing electrodes may have various shapes such as polygon, circle, ellipse, and irregular shape, and the shape of each of the sensing electrodes is not particularly limited. For example, each of the sensing electrodes may have a rhombus shape, and the sensing electrodes arranged in the same sensing electrode column or row may be electrically connected to each other by a bridge pattern.

2 and 3, the touch screen substrate 200 according to another embodiment of the present invention includes a base substrate 210, a transparent electrode pattern 230, and a refractive index compensation layer 220.

The base substrate 210 is substantially the same as the base substrate 110 described with reference to FIG. 1, and the transparent electrode pattern 230 is formed between the base substrate 210 and the refractive index compensation layer 220. Except for this, since it is substantially the same as the transparent electrode pattern 130 described with reference to FIG. 1, detailed description thereof will be omitted.

The refractive index compensation layer 220 is formed on the base substrate 210 on which the transparent electrode pattern 230 is formed, so that the upper portion of the transparent electrode pattern 230 and the transparent electrode pattern 230 are not formed. The upper surface of the base substrate 210 may be covered. The refractive index compensation layer 220 may be formed using the refractive index matching composition according to the embodiment of the present invention described above.

For example, as shown in FIG. 3, the refractive index compensation layer 220 may be formed by using a composition for first refractive index matching having a relatively low viscosity on the base substrate 210 on which the transparent electrode pattern 230 is formed. After the first refractive index compensation layer 221 is formed, the second refractive index compensation layer 222 may be formed by using a second refractive index matching composition having a relatively high viscosity on the first refractive index compensation layer 221. Can be.

For example, the first refractive index compensation layer 221 may include the diacrylate monomer, the monofunctional acrylate monomer, and the inorganic particles on the base substrate 210 on which the transparent electrode pattern 230 is formed. And coating the first refractive index matching composition further including a solvent in addition to the photoinitiator, removing the solvent, and irradiating UV rays to cure the composition. When the first refractive index matching composition is coated on the base substrate 210 on which the transparent electrode pattern 230 is formed, since the first refractive index matching composition has a low viscosity, the first refractive index matching composition is formed by the first refractive index matching composition. The first refractive index compensation layer 221 is not flat because of the step between the surface of the base substrate 210 and the transparent electrode pattern 230, as a result of which the first refractive index compensation layer 221 is critical It will have a burnt surface. The second refractive index compensating layer 222 may include the second refractive index matching composition including the diacrylate monomer, the monofunctional acrylate monomer, the inorganic particles, and the photoinitiator without the solvent. After coating on the first refractive index compensation layer 221 may be formed by irradiating ultraviolet light and curing it. When the second refractive index matching composition is coated on the first refractive index compensating layer 221, even if the surface of the first refractive index compensating layer 221 is uneven because the viscosity of the second refractive index matching composition is high. The second refractive index compensation layer 222 formed by the second refractive index matching composition may have a flat surface.

The second refractive index compensation layer 222 may have a solid phase refractive index different from that of the first refractive index compensation layer 221. For example, the first refractive index compensation layer 221 and the second may be different from each other by varying the content of the inorganic particles included in the first refractive index matching composition and the content of the inorganic particles included in the second refractive index matching composition. The solid phase refractive index of the refractive index compensation layer 222 may be different from each other. For example, the second refractive index compensation layer 222 may have a solid phase refractive index smaller than that of the first refractive index compensation layer 221. That is, the first refractive index compensation layer 221 is formed using a first refractive index matching composition including a relatively large amount of inorganic particles, and the second refractive index compensation layer 222 is a relatively small amount of inorganic particles. It may be formed using a second refractive index matching composition containing particles.

Referring to FIG. 4, the touch screen substrate 300 according to another embodiment of the present invention may include a base substrate 310, a first refractive index compensation layer 321, a second refractive index compensation layer 323, and a first transparent electrode. The pattern 331 and the second transparent electrode pattern 333 may be included.

Since the base substrate 310 is substantially the same as the base substrate 110 described with reference to FIG. 1, detailed description thereof will be omitted.

The first refractive index compensation layer 321 is formed on the first surface of the base substrate 310, and the second refractive index compensation layer 323 is formed on the first surface of the base substrate 310 facing the first surface. It is formed on two sides. The first refractive index compensating layer 321 and the second refractive index compensating layer 323 are substantially the same as the refractive index compensating layer 120 described with reference to FIG. 1 using the refractive index matching composition according to the embodiment of the present invention. Since it can be formed by the method, detailed description thereof will be omitted.

The first transparent electrode pattern 331 is formed on the first refractive index compensation layer 321, and the second transparent electrode pattern 333 is formed on the second refractive index compensation layer 323.

The first transparent electrode pattern 331 includes a plurality of first sensing electrodes arranged in a first matrix form, and the second transparent electrode pattern 333 includes a plurality of second sensing electrodes arranged in a second matrix form. Can include them. In the case of the first sensing electrodes, sensing electrodes arranged in the same row may be electrically connected to each other to form a plurality of first sensing electrode columns, and in the case of the second sensing electrodes, the same column The sensing electrodes may be electrically connected to each other to form a plurality of second sensing electrode rows. That is, the first sensing electrode columns may determine the X-coordinate of the point where the user's touch is made, and the second sensing electrode rows may determine the Y-coordinate of the point where the user's touch is made. The first sensing electrodes and the second sensing electrodes may be alternately disposed so as not to overlap each other.

The first transparent electrode pattern 331 and the second transparent electrode pattern 333 may be formed of a material and a method substantially the same as those of the transparent electrode pattern 130 described with reference to FIG. 1. Since the shape of each of the two sensing electrodes is substantially the same as the sensing electrode of the transparent electrode pattern 130 described with reference to FIG. 1, detailed description thereof will be omitted.

Referring to FIG. 5, the touch screen substrate 400 according to another embodiment of the present invention may include a base substrate 410, a first transparent electrode pattern 431, a second transparent electrode pattern 433, and a first refractive index compensation. The layer 421 and the second refractive index compensation layer 423 may be included.

Since the base substrate 410 is substantially the same as the base substrate 110 described with reference to FIG. 1, detailed description thereof will be omitted.

The first transparent electrode pattern 431 is formed on the first surface of the base substrate 410, and the second transparent electrode pattern 433 is formed on the first surface of the base substrate 410 opposite to the first surface. It is formed on two sides. The first transparent electrode pattern 431 and the second transparent electrode pattern 433 are formed on the base substrate 410 to form the first refractive index compensation layer 421 and the second refractive index compensation layer 423. Except that it is covered by the first transparent electrode pattern 331 and the second transparent electrode pattern 333 described above with reference to the substantially the same, so the detailed description thereof will be omitted.

The first refractive index compensation layer 421 is formed on the first surface of the base substrate 410 on which the first transparent electrode pattern 431 is formed, and the second refractive index compensation layer 423 is the second transparent. An electrode pattern 433 is formed on the second surface of the base substrate 410 on which the electrode pattern 433 is formed. Since each of the first and second refractive index compensation layers 421 and 423 is substantially the same as the refractive index compensation layer 220 described with reference to FIGS. 2 and 3, detailed descriptions thereof will be omitted. .

Although not shown in the drawings, the touch screen substrate according to another embodiment of the present invention may include a base substrate, a first transparent electrode pattern, a second transparent electrode pattern, a first refractive index compensation layer and a second refractive index compensation layer. have.

In one embodiment, the first transparent electrode pattern and the first refractive index compensation layer is formed substantially the same as the first transparent electrode pattern 331 and the first refractive index compensation layer 321 shown in FIG. The second transparent electrode pattern and the second refractive index compensation layer may be formed in the same manner as the second transparent electrode pattern 433 and the second refractive index compensation layer 423 illustrated in FIG. 5.

In another embodiment, the first transparent electrode pattern and the first refractive index compensation layer are formed substantially the same as the first transparent electrode pattern 431 and the first refractive index compensation layer 421 shown in FIG. 5. The second transparent electrode pattern and the second refractive index compensation layer may be formed in the same manner as the second transparent electrode pattern 333 and the second refractive index compensation layer 323 illustrated in FIG. 4.

Referring to FIG. 6, the touch screen substrate 500 according to another embodiment of the present invention may include a base substrate 510, a first transparent electrode pattern 531, a first refractive index compensation layer 521, and a second transparent electrode. Pattern 533.

Since the base substrate 510 is substantially the same as the base substrate 110 described with reference to FIG. 1, detailed description thereof will be omitted.

The first transparent electrode pattern 531 may be formed on one surface of the base substrate 510, and the first refractive index compensation layer 521 may be formed on the base substrate on which the first transparent electrode pattern 531 is formed. It may be formed to cover the first transparent electrode pattern 531 on one surface of the 510. The first transparent electrode pattern 531 and the first refractive index compensation layer 521 are substantially the same as the first transparent electrode pattern 431 and the first refractive index compensation layer 421 described with reference to FIG. 5. Duplicate detailed descriptions are omitted.

The second transparent electrode pattern 533 may be formed on the first refractive index compensation layer 521. The second transparent electrode pattern 533 is substantially the same as the second transparent electrode pattern 433 described with reference to FIG. 5 except that the second transparent electrode pattern 533 is formed on the first refractive index compensation layer 521. Detailed description is omitted.

The touch screen substrate 500 according to the present exemplary embodiment is formed on the first refractive index compensation layer 521 on which the second transparent electrode pattern 533 is formed to form the second transparent electrode pattern 533 and the second transparent. The display device may further include a second refractive index compensation layer 523 covering a surface area of the first refractive index compensation layer 521 on which the electrode pattern 533 is not formed. Since the second refractive index compensation layer 523 is substantially the same as the refractive index compensation layer 220 described with reference to FIGS. 2 and 3, detailed description thereof will be omitted.

The solid phase refractive index of the second refractive index compensation layer 523 may be the same as or different from the solid phase refractive index of the first refractive index compensation layer 521. For example, the solid phase refractive index of the second refractive index compensation layer 523 may be smaller than that of the first refractive index compensation layer 521.

The touch screen substrates according to the embodiments of the present invention described above may further include a driving unit for supplying current to the sensing electrodes of the transparent electrode pattern. The driving unit may be formed in an area of the touch screen substrate where a user's touch is not detected. Hereinafter, an embodiment of the driving unit will be described with reference to FIGS. 7 and 8.

For convenience of description, an area in which the sensing electrodes are formed in the area of the touch screen substrate, in which a user's touch can be detected, is defined as a 'touch area', and an area in which the user's touch is not detected is called a 'peripheral area'. define.

FIG. 7 is a cross-sectional view illustrating an embodiment of a driver applied to a touch screen substrate according to an exemplary embodiment of the present invention. FIG. As shown in FIG. 1 and FIG. 4, the driving unit 740 illustrated in FIG. 7 includes a touch screen in which a refractive index compensation layer 720 is formed between the transparent electrode pattern 730 and the base substrate 710. It may be applied to the substrate 700.

Referring to FIG. 7, the refractive index compensation layer 720 disposed on the base substrate 710 is formed in both the touch area TA and the peripheral area PA, and the driving unit 740 is the peripheral area ( It may be formed on the refractive index compensation layer 720 located in PA).

The driver 740 may include a wiring and a driving device. The wiring is formed on the refractive index compensation layer 720 and is electrically connected to the transparent electrode pattern 730. The driving device may be electrically connected to the wiring on the refractive index compensation layer 720 and supply a current to the transparent electrode pattern 730.

8 is a cross-sectional view for describing another embodiment of a driving unit applied to a touch screen substrate according to an embodiment of the present invention. As shown in FIG. 2, FIG. 3, FIG. 5, and FIG. 6, the driving unit 840 illustrated in FIG. 8 includes a base substrate (eg, a substrate) such that the refractive index compensation layer 820 covers the transparent electrode pattern 830. 810 may be applied to the touch screen substrate 800 formed thereon.

Referring to FIG. 8, the refractive index compensation layer 820 is formed only on an upper portion of the touch area TA of the touch area TA and the peripheral area PA of the base substrate 810, and the driving unit 840 is The refractive index compensation layer 820 may be formed in the peripheral area PA of the base substrate 810.

The refractive index compensation layer 820 forms a refractive index compensation layer on the touch area TA and the peripheral area PA of the base substrate 810 by using the refractive index matching composition according to an embodiment of the present invention. It may be formed by removing the refractive index compensation layer formed in the peripheral area PA. For example, in order to form the refractive index compensation layer 820, the refractive index compensation layer is formed on the touch area TA and the peripheral area PA of the base substrate 810 and formed in the peripheral area PA. After covering the upper part of the refractive index compensation layer with a mask, only the refractive index compensation layer formed in the touch area TA may be cured. Subsequently, the refractive index compensation layer 820 may be formed only in the touch area TA of the base substrate 810 by removing the refractive index compensation layer formed in the peripheral area PA that is not cured. The mask may be formed using a photoresist, and the uncured refractive index compensation layer formed in the peripheral area PA may include potassium hydroxide (KOH), tetramethylammonium hydroxide (TMAH), isopropyl alcohol, and the like. It can be removed using a developer.

The driver 840 may be formed in the peripheral area PA of the base substrate 810 on which the refractive index compensation layer 820 is not formed. In detail, the driver 840 may include a wiring formed on the base substrate 810 to be electrically connected to the transparent electrode pattern 830, and a driving device electrically connected to the wiring on the base substrate 810. have.

According to such a touch screen substrate, it is possible to prevent display defects such that the transparent electrode pattern is visually recognized by the user. In general, light passing through the touch area of the touch screen substrate includes light passing through an area where the sensing electrodes are formed and light passing through an area where the sensing electrodes are not formed. The refractive indexes of the base substrate and the transparent electrode pattern are different. Since different from each other, the transparent electrode pattern may be visually recognized by the user when the refractive index compensation layer is not present. The touch screen substrate according to the embodiment of the present invention forms the refractive index compensation layer to compensate for the difference in refractive index between the transparent electrode pattern and the substrate, thereby preventing the transparent electrode pattern from being recognized by the user.

<표시장치><Display device>

Referring to FIG. 9, the display device 1000 according to an exemplary embodiment of the present invention includes a display panel 1100 and a touch screen panel 1200.

As the display panel 1100, a known display panel may be used without limitation. For example, a liquid crystal display panel, an organic light emitting display panel, or the like may be used as the display panel 1100. When the display panel 1100 is a liquid crystal display panel, the display panel 1100 may include a lower substrate 1110, an upper substrate 1120, and a liquid crystal disposed between the lower substrate 1110 and the upper substrate 1120. (Not shown). A thin film transistor for driving the liquid crystal may be formed on the lower substrate 1110, and a color filter may be formed on the upper substrate 1120.

The touch screen panel 1200 may include a touch screen substrate 1210 and an input substrate 1220 according to the embodiment of the present invention described above.

The touch screen substrate 1210 may include a base substrate 1211 positioned on the display panel 1100, a refractive index compensation layer 1212 formed on the base substrate 1211, and an upper portion of the refractive index compensation layer 1212. A transparent electrode pattern 1213 and a driver 1214 formed in the may include. The transparent electrode pattern 1213 may include first sensing electrodes for determining the X-coordinate of the touch point of the user and second sensing electrodes for determining the Y-coordinate. Since the touch screen substrate 1210 is substantially the same as the touch screen substrate 100 described with reference to FIG. 1, detailed description thereof will be omitted.

In this case, the input substrate 1220 is disposed on the transparent electrode pattern 1213, and the input substrate 1220 is the refractive index compensation layer on which the transparent electrode pattern 1213 is formed by the transparent adhesive layer 1230. And may be attached to the surface of 1212. The input substrate 1220 may be a part touched by a user, and a known substrate may be used without limitation.

Although not illustrated, the transparent electrode pattern 1213 may be formed on the base substrate 1211, and the refractive index compensation layer 1212 may be formed on the base substrate on which the transparent electrode pattern 1213 is formed. The upper surface of the base substrate 1211 may be formed on the upper portion 1211 to cover the transparent electrode pattern 1213 and the transparent electrode pattern 1213. The transparent electrode pattern 1213 may include first sensing electrodes for determining the X-coordinate of the touch point of the user and second sensing electrodes for determining the Y-coordinate. Since the touch screen substrate 1210 is substantially the same as the touch screen substrate 200 described with reference to FIGS. 2 and 3, detailed description thereof will be omitted.

In this case, the input substrate 1220 may be disposed on the refractive index compensation layer 1212, and the input substrate 1220 may be attached to the surface of the refractive index compensation layer 1212 by a transparent adhesive layer 1230. have.

Referring to FIG. 10, the display device 2000 according to another embodiment of the present invention includes a display panel 2100 and a touch screen panel 2200.

Since the display panel 2100 is substantially the same as the display panel 1100 described with reference to FIG. 9, detailed description thereof will be omitted.

The touch screen panel 2200 may include a touch screen substrate according to the embodiment of the present invention described above.

The touch screen substrate 2200 may include a base substrate 2211 positioned on the display panel 2100, a refractive index compensation layer 2212 formed under the base substrate 2211, and a lower portion of the refractive index compensation layer 2212. It may include a transparent electrode pattern 2213 formed in. The transparent electrode pattern 2213 may include first sensing electrodes for determining the X-coordinate of the touch point of the user and second sensing electrodes for determining the Y-coordinate. Since the touch screen substrate 2210 is substantially the same as the touch screen substrate 100 described with reference to FIG. 1, detailed description thereof will be omitted. In this case, the refractive index compensation layer 2212 having the transparent electrode pattern 2213 formed on a surface thereof may be attached to the upper substrate 2120 of the display panel 2100 by the transparent adhesive layer 2230.

Although not shown in the drawing, the transparent electrode pattern 2213 is formed under the base substrate 2211, and the refractive index compensation layer 2212 is the base substrate 2211 on which the transparent electrode pattern 2213 is formed. It is also possible to have a structure formed on the lower surface of the cover to cover the lower surface of the base substrate 2211 in which the transparent electrode pattern 2213 and the transparent electrode pattern 2213 is not formed. The transparent electrode pattern 2213 may include first sensing electrodes for determining the X-coordinate of the touch point of the user and second sensing electrodes for determining the Y-coordinate. Since the touch screen substrate is substantially the same as the touch screen substrate 200 described with reference to FIGS. 2 and 3, detailed description thereof will be omitted. In this case, the refractive index compensation layer 2212 may be attached to the upper substrate 2120 of the display panel 2100 by the transparent adhesive layer 2230.

Referring to FIG. 11, the display device 3000 according to another exemplary embodiment of the present invention includes a display panel 3100 and a touch screen panel 3200.

Since the display panel 3100 is substantially the same as the display panel 1100 described with reference to FIG. 9, detailed description thereof will be omitted.

The touch screen panel 3200 includes a touch screen substrate 3210 and an input substrate 3220.

The touch screen substrate 3200 may include a first base substrate 3211a positioned on the display panel 3100, a first refractive index compensation layer 3212a formed on the first base substrate 3211a, and the first The first transparent electrode pattern 3213a and the first driver 3214a formed on the first refractive index compensation layer 3212a and the second base positioned on the first transparent electrode pattern 3213a and the first driver 3214a. The second refractive index compensation layer 3212b formed on the substrate 3211b, the second base substrate 3211b, and the second transparent electrode pattern 3213b and the second driver 3214b formed on the refractive index compensation layer 3212b. ).

Since the touch screen substrate 3210 is substantially the same as a structure in which two touch screen substrates 100 described with reference to FIG. 1 are attached using the first transparent adhesive layer 3321, detailed description thereof will be omitted. do. In the present embodiment, two touch screen substrates 100 described with reference to FIG. 1 have one surface of the second base substrate 3211b in which the second refractive index compensation layer, the second transparent electrode pattern, and the like are not formed. The electrode pattern 3213a and the first driver 3214a are coupled to face the first refractive index compensation layer 3212a.

The second base substrate 3211b is formed on a surface of the first refractive index compensation layer 3212a on which the first transparent electrode pattern 3213a and the first driver 3214a are formed by the first transparent adhesive layer 3231. Can be attached.

The first transparent electrode pattern 3213a includes first sensing electrodes for determining an X-coordinate of a user's touch point, and the second transparent electrode pattern 3213b includes a Y-coordinate of a user's touch point. And second sensing electrodes for discriminating.

The input substrate 3220 is disposed on the second transparent electrode pattern 3213b and the second driver 3214b, and the input substrate 3220 is formed of the second transparent adhesive layer 3322 by the second transparent adhesive layer 3322. The electrode pattern 3213b and the second driver 3214b may be attached to a surface of the second refractive index compensation layer 3212b on which the electrode pattern 3213b and the second driver 3214b are formed. The input substrate 3220 may be a part touched by a user, and a known substrate may be used without limitation.

Although not shown in the drawing, in one embodiment, the first transparent electrode pattern 3213a is formed on the first base substrate 3211a, and the first refractive index compensation layer 3212a is the first transparent electrode. The first base substrate 3211a, which is formed on the first base substrate 3211a on which the electrode pattern 3213a is formed, so that the first transparent electrode pattern 3213a and the first transparent electrode pattern 3213a are not formed. May cover the surface area of the substrate. In this case, the second transparent electrode pattern 3213b and the second refractive index compensation layer 3212b may be formed as shown in FIG. 11.

Although not shown in the drawing, in another embodiment, the second transparent electrode pattern 3213b is formed on the second base substrate 3211b, and the second refractive index compensation layer 3212b is formed on the second transparent electrode. The second base substrate 3211b that is formed on the second base substrate 3211b on which the electrode pattern 3213b is formed so that the second transparent electrode pattern 3213b and the second transparent electrode pattern 3213b are not formed. May cover the surface area of the substrate. In this case, the first transparent electrode pattern 3213a and the first refractive index compensation layer 3212a may be formed as shown in FIG. 11.

Although not shown in the drawing, in another embodiment, the first transparent electrode pattern 3213a is formed on the first base substrate 3211a, and the first refractive index compensation layer 3212a is formed on the first The first base substrate formed on the first base substrate 3211a on which the transparent electrode pattern 3213a is formed and on which the first transparent electrode pattern 3213a and the first transparent electrode pattern 3213a are not formed. It may cover the surface area of 3211a). Further, the second transparent electrode pattern 3213b is formed on the second base substrate 3211b, and the second refractive index compensation layer 3212b is the second base substrate on which the second transparent electrode pattern 3213b is formed. An upper surface of the second base substrate 3211b may be formed on the upper portion 3111b and do not have the second transparent electrode pattern 3213b and the second transparent electrode pattern 3213b formed thereon.

Referring to FIG. 12, the display device 4000 according to another exemplary embodiment of the present invention includes a display panel 4100 and a touch screen panel 4200. Since the display device 4000 according to the present exemplary embodiment is substantially the same as the display device 3000 described with reference to FIG. 11 except for the touch screen substrate 4210, detailed descriptions thereof will be omitted.

Since the display panel 4100 is substantially the same as the display panel 1100 described with reference to FIG. 9, detailed description thereof will be omitted.

The touch screen panel 4200 includes a touch screen substrate 4210 and an input substrate 4220.

The touch screen substrate 4200 may include a first base substrate 4211a positioned above the display panel 4100, a first refractive index compensation layer 4212a formed under the first base substrate 4211a, and the first base substrate 4211a. The first transparent electrode pattern 4213a formed under the first refractive index compensating layer 4212a, the first driver 4214a, and the second base substrate 4211b positioned on the first base substrate 4211a and the second A second refractive index compensation layer 4212b formed on the second base substrate 4211b, a second transparent electrode pattern 4213b formed on the refractive index compensation layer 4212b, and a second driving part 4214b are included.

Since the touch screen substrate 4210 is substantially the same as the structure in which two touch screen substrates 100 described with reference to FIG. 1 are attached using the second transparent adhesive layer 4232, detailed description thereof will be omitted. do. In the present exemplary embodiment, the two touch screen substrates 100 described with reference to FIG. 1 have a second base substrate 4211b in which the second refractive index compensation layer 4212b, the second transparent electrode pattern 4213b, and the like are not formed. One surface of is coupled to face one surface of the first base substrate 4211a on which the first refractive index compensation layer 4212a, the first transparent electrode pattern 4213a, and the like are not formed.

The first refractive index compensation layer 4212a having the first transparent electrode pattern 4213a formed on a surface thereof may be attached to the upper substrate 4120 of the display panel 4100 by a first transparent adhesive layer 4231. . The second base substrate 4211b may be attached to one surface of the first base substrate 4211a by a second transparent adhesive layer 4232. The input substrate 4220 is disposed on the second transparent electrode pattern 4213b and the second driver 4214b, and the input substrate 4220 is formed of the second transparent adhesive layer 4333 by the third transparent adhesive layer 4233. The electrode pattern 4213b and the second driver 4214b may be attached to a surface of the second refractive index compensation layer 4212b formed thereon.

Although not shown in the drawing, in an embodiment, the first transparent electrode pattern 4213a is formed under the first base substrate 4211a, and the first refractive index compensation layer 4212a is formed on the first transparent electrode. The first base substrate formed on the lower surface of the first base substrate 4211a on which the electrode pattern 4213a is formed, and thus the first transparent electrode pattern 4213a and the first transparent electrode pattern 4213a are not formed. May cover the lower surface area of 4211a. In this case, the first transparent electrode pattern 4213a and the first refractive index compensation layer 4212a may be formed as shown in FIG. 12.

Although not shown in the drawing, in another embodiment, the second transparent electrode pattern 4213b is formed on the second base substrate 4211b, and the second refractive index compensation layer 4212b is formed on the second transparent electrode. The second base substrate 4211b formed on the second base substrate 4211b on which the electrode pattern 4213b is formed so that the second transparent electrode pattern 4213b and the second transparent electrode pattern 4213b are not formed. May cover an upper surface area. In this case, the first transparent electrode pattern 4213a and the first refractive index compensation layer 4212a may be formed as shown in FIG. 12.

Although not shown in the drawing, in another embodiment, the first transparent electrode pattern 4213a is formed under the first base substrate 4211a, and the first refractive index compensation layer 4212a is formed on the first The first base is formed on the lower surface of the first base substrate 4211a on which the transparent electrode pattern 4213a is formed, and thus the first transparent electrode pattern 4213a and the first transparent electrode pattern 4213a are not formed. The lower surface area of the substrate 4211a may be covered. Further, the second transparent electrode pattern 4213b is formed on the second base substrate 4211b, and the second refractive index compensation layer 4212b is formed on the second base substrate on which the second transparent electrode pattern 4213b is formed. A structure covering the upper surface area of the second base substrate 4211b that is formed on the 4211b and does not have the second transparent electrode pattern 4213b and the second transparent electrode pattern 4213b is also possible. .

Referring to FIG. 13, a display device 5000 according to another embodiment of the present invention includes a display panel 5100 and a touch screen panel 5200.

Since the display panel 5100 is substantially the same as the display panel 1100 described with reference to FIG. 9, detailed description thereof will be omitted.

The touch screen panel 5200 includes a touch screen substrate 5210.

The touch screen substrate 5200 may include a first base substrate 5211a positioned on the display panel 5100, a first refractive index compensation layer 5212a formed on the first base substrate 5211a, and the first base substrate 5211a. The first transparent electrode pattern 5213a and the first driver 5214a formed on the first refractive index compensation layer 5212a and the second transparent electrode formed on the first transparent electrode pattern 5213a and the first driver 5214a. The second refractive index compensation layer 5212b and the second refractive index compensation layer 5212b formed on the pattern 5213b and the second driver 5214b, and on the second transparent electrode pattern 5213b and the second driver 5214b. And a second base substrate 5211b positioned at. The first refractive index compensation layer 5212a having the first transparent electrode pattern 5213a and the first driver 5214a formed on the surface, and the second transparent electrode pattern 5213b and the second driver 5214b formed thereon. The second refractive index compensation layer 5212b is attached to each other by the transparent adhesive layer 5230 so that the first transparent electrode pattern 5213a and the second transparent electrode pattern 5213b face each other.

Since the touch screen substrate 5210 is substantially the same as a structure in which two touch screen substrates 100 described with reference to FIG. 1 are attached using the transparent adhesive layer 5230, detailed description thereof will be omitted. In the present exemplary embodiment, the two touch screen substrates 100 described with reference to FIG. 1 are coupled such that the second transparent electrode pattern 5213b faces the first transparent electrode pattern 5213a.

In the display device 5000 according to the present exemplary embodiment, the second base substrate 5211b serves as an input substrate on which a user touches.

Although not shown in the drawing, in an embodiment, the first transparent electrode pattern 5213a is formed on the first base substrate 5211a, and the first refractive index compensation layer 5212a is formed on the first transparent electrode. The first base substrate formed on an upper surface of the first base substrate 5211a on which the electrode pattern 5213a is formed, and on which the first transparent electrode pattern 5213a and the first transparent electrode pattern 5213a are not formed. A structure that covers the upper surface area of 5211a is also possible. In this case, the second transparent electrode pattern 5213b and the second refractive index compensation layer 5212b may be formed as shown in FIG. 13.

Although not shown in the drawings, in another embodiment, the second transparent electrode pattern 5213b is formed under the second base substrate 5211b, and the second refractive index compensation layer 5212b is formed on the second transparent electrode. The second base substrate formed on the bottom surface of the second base substrate 5211b on which the electrode pattern 5213b is formed, and thus the second transparent electrode pattern 5213b and the second transparent electrode pattern 5213b are not formed. May cover a lower surface area of 5211b. In this case, the first transparent electrode pattern 5213a and the first refractive index compensation layer 5212a may be formed as shown in FIG. 13.

Although not shown in the drawing, in another embodiment, the first transparent electrode pattern 5213a is formed on the first base substrate 5211a, and the first refractive index compensation layer 5212a is formed on the first The first base is formed on the upper surface of the first base substrate 5211a on which the transparent electrode pattern 5213a is formed, and thus the first transparent electrode pattern 5213a and the first transparent electrode pattern 5213a are not formed. The upper surface area of the substrate 5211a may be covered. Further, the second transparent electrode pattern 5213b is formed under the second base substrate 5211b, and the second refractive index compensation layer 5212b is the second base substrate on which the second transparent electrode pattern 5213b is formed. A structure diagram formed on a bottom surface of 5211b and covering a lower surface area of the second base substrate 5211b in which the second transparent electrode pattern 5213b and the second transparent electrode pattern 5213b are not formed. It is possible.

Referring to FIG. 14, the display device 6000 according to another exemplary embodiment includes a display panel 6100 and a touch screen panel 6200.

Since the display panel 6100 is substantially the same as the display panel 1100 described with reference to FIG. 9, detailed description thereof will be omitted.

The touch screen panel 6200 includes a touch screen substrate 6210 and an input substrate 6220.

The touch screen substrate 6200 may include a base substrate 6211 positioned on the display panel 6100, a first transparent electrode pattern 6213a and a first driver 6214a formed on the base substrate 6211. And a refractive index compensating layer 6212 formed on the first base substrate 6221 on which the first transparent electrode pattern 6213a and the first driver 6214a are formed, and a second formed on the refractive index compensating layer 6212. And a second transparent electrode pattern 6213b and a second driver 6214b. Since the touch screen substrate 6200 is substantially the same as the touch screen substrate 500 described with reference to FIG. 6, detailed description thereof will be omitted.

The input substrate 6220 is attached to the refractive index compensation layer 6212 having the second transparent electrode pattern 6213b and the second driver 6214b formed on a surface thereof by the transparent adhesive layer 6230.

Referring to FIG. 15, the display device 7000 according to another exemplary embodiment of the present invention includes a display panel 7100 and a touch screen panel 7200.

Since the display panel 7100 is substantially the same as the display panel 1100 described with reference to FIG. 9, detailed description thereof will be omitted.

The touch screen panel 7200 includes a touch screen substrate 7210 and an input substrate 7220.

The touch screen substrate 7200 may include a base substrate 7141 positioned on the display panel 7100, a first refractive index compensation layer 7212a formed on a lower surface of the base substrate 7181, and the first refractive index The first transparent electrode pattern 7213a and the first driver 7214a formed on the bottom surface of the compensation layer 7212a, the second refractive index compensation layer 7212b formed on the top surface of the base substrate 7121, and the second The second transparent electrode pattern 7213b and the second driver 7214b formed on the upper surface of the second refractive index compensation layer 7212b are included. Since the touch screen substrate 7200 is substantially the same as the touch screen substrate 300 described with reference to FIG. 4, detailed description thereof will be omitted.

The input substrate 7220 is attached to the second refractive index compensation layer 7212b having the second transparent electrode pattern 7213b and the second driver 7214b formed on a surface thereof by a transparent adhesive layer 7222.

Meanwhile, in the present embodiment, the touch screen substrate 400 described with reference to FIG. 5 may be applied to the touch screen substrate 7200.

According to such a display device, it is possible to prevent display defects such that the transparent electrode pattern is visually recognized by the user. The display device according to the present invention includes a touch screen substrate that can compensate for the difference in refractive index between the transparent electrode pattern and the base substrate by forming a refractive index compensation layer including inorganic particles, so that the transparent electrode pattern is recognized by the user. Can be prevented.

1. Preparation of monostructured inorganic particles

To a 500 ml zirconium acetate solution (zirconium precursor) containing 21 wt% zirconium oxide (ZrO ₂ ) in a 1000 ml beaker, 5.2 g of aluminum isopropyl oxide (aluminum precursor) and 0.2 g of chromium acetate monohydrate (chromium precursor) were added and stirred. .

The precursors were mixed and then completely dissolved through an ultrasonic process. After the dissolved mixed solution was transferred to a 1 L liner high pressure reactor, the reaction temperature was set so that the internal pressure of the high pressure reactor was 30 atm. When the internal pressure of the high pressure reactor reached 30 atm, the inorganic sample was prepared by maintaining at the pressure for 5 hours. The prepared inorganic sample was passed through a dryer or spray dried to prepare inorganic particles from which moisture contained in the sample was removed.

2. Preparation of Core Shell Structure Inorganic Particles

100 g of titanium isopropoxide was added as a precursor of TiO _{2 to} a 500 ml beaker, followed by stirring. Subsequently, 1.32 g of barium acetate, which is a precursor of BaO ₂ , and 300 g of distilled water were added thereto, followed by adding 66 g of acetic acid and stirring to prepare 467.32 g of a colloidal solution including a core. For the total content of the colloidal solution, the content of the core was about 17% by weight.

To the sample bottle containing 467.32 g of the colloidal solution, 240 g of zirconium acetate as a precursor of ZrO ₂ and 3.75 g of aluminum isopropoxide, which is a precursor of Al ₂ O ₃ , were added. The sample bottle was reacted at about 30 atmospheres (30 atm) for about 3 hours using a 1 L liner high pressure reactor to prepare an inorganic particle having a core-shell structure. The prepared inorganic particles were passed through a dryer to remove moisture.

The diameter of the inorganic particle measured by the transmission electron microscope (TEM) was about 20 nm. The weight ratio of the core and the shell was about 65:35, and the weight ratio of barium (Ba) and titanium (Ti) in the core was about 6.5: 93.5, and in the shell, aluminum (Al) and zirconium (Zr). The weight ratio of was about 3:97.

3. Preparation of Composition

[실시예 1]Example 1

25 wt% of a diacrylate monomer comprising fluorene represented by Formula 1, 15 wt% of 2-phenoxy ethyl acrylate, 55 wt% of a single structure inorganic particle, based on the total weight of the composition; A composition according to Example 1 was prepared comprising 5% by weight of diphenyl (2,4,6-trimethylbenzoyl) phosphine oxide (TPO) as a photoinitiator.

In Formula 1, Y1, Y2, Z1 and Z2 each independently represent hydrogen, n is 1, m is 1.

[실시예 2]Example 2

Example 2 was used in substantially the same manner as in Example 1, except that in Example 1, Phenylthio ethyl acrylate was used instead of 2-Phenoxy ethyl Acrylate. According to the present invention.

[실시예 3]Example 3

Substantially the same method as Example 2 except for using o-phenyl phenol ethoxy Acrylate instead of 2-Phenoxy ethyl Acrylate in Example 2 Was used to prepare a composition according to Example 3.

[실시예 4]Example 4

A composition according to Example 4 was prepared in substantially the same manner as in Example 1, except that in Example 1 coreshell structured inorganic particles were used instead of single structured inorganic particles.

[실시예 5]Example 5

Using the core-shell structured inorganic particles instead of the single structured inorganic particles in Example 2 was prepared in the same manner as in Example 5 using substantially the same method as in Example 2.

[실시예 6]Example 6

A composition according to Example 6 was prepared in substantially the same manner as in Example 3, except that Example 3 used core-shell structural inorganic particles instead of single structured inorganic particles.

[비교예 1]Comparative Example 1

Trimethylolpropane triacrylate (TMPTA) purchased from Sigma Aldrich (Company, USA) was prepared.

[실험예 1] - 고상 굴절률 특성 평가[Experimental Example 1]-Evaluation of the solid-state refractive index characteristics

After stirring the composition of Example 1 for about 3 hours and spin-coated on a glass substrate, and cured using an exposure machine of Uniram (company name, Korea) including a UV lamp having a wavelength of 400nm to form a refractive index compensation layer 1 It was. The refractive index compensation layer 1 had a flat surface and had a thickness of about 1.5 μm.

In substantially the same manner as the refractive index compensation layer 1, the refractive index compensation layers 2 to 6 and the refractive index compensation layer 7 were formed using the compositions of Examples 2 to 6 and Comparative Example 1, respectively. The refractive index compensation layers 2 to 7 also had a flat surface and a thickness of about 1.5 mu m.

The refractive index of the refractive index compensation layers 1 to 7 was measured using a prism coupler (trade name: 2010 / M) of Metricon (Metricon, Inc., USA), and Table 1 shows the refractive index measurement results.

Table 1

division	Solid state refractive index
Refractive Index Compensation Layer 1 (Example 1)	1.670
Refractive Index Compensation Layer 2 (Example 2)	1.683
Refractive Index Compensation Layer 3 (Example 3)	1.692
Refractive Index Compensation Layer 4 (Example 4)	1.700
Refractive Index Compensation Layer 5 (Example 5)	1.705
Refractive Index Compensation Layer 6 (Example 6)	1.712
Refractive Index Compensation Layer 7 (Comparative Example 1)	1.495

Referring to Table 1, it can be seen that the refractive index compensation layers 1 to 6 each formed of the compositions of Examples 1 to 6 have a significantly higher solid phase refractive index than the refractive index compensation layer 7 formed of the composition of Comparative Example 1.

[실험예 2] - 광투과도 특성 평가Experimental Example 2-Evaluation of Light Transmittance Characteristics

For each of the refractive index compensation layer 1, the refractive index compensation layer 4 and the refractive index compensation layer 7, light transmittance was measured using UV-Visible (manufacturer: Agilent, model name: CARY 4000, Lamp: 550 nm Mercury lamp). The above is the result of measuring light transmittance.

TABLE 2

division	Light transmittance (%)
Refractive Index Compensation Layer 1 (Example 1)	97.2
Refractive Index Compensation Layer 4 (Example 4)	97.0
Refractive Index Compensation Layer 7 (Comparative Example 1)	97.5

Referring to Table 2, although the refractive index compensation layers 1 and 4 were formed of the compositions of Examples 1 and 4 including the single structure and the core-shell structured inorganic particles, the refractive index formed of the composition of Comparative Example 1 containing no inorganic particles It can be seen that the light transmittance is almost the same level as the compensation layer 7.

[실험예 3]Experimental Example 3

Sample 1 was prepared by forming a transparent electrode pattern made of indium tin oxide having a refractive index of about 2.0 on top of the refractive index compensation layer 4 formed using the composition of Example 4. The transparent electrode pattern was formed by forming a transparent layer having a thickness of about 170 nm using indium tin oxide, and then patterning the transparent layer through a photolithography process to form a plurality of electrodes. In the transparent electrode pattern, a distance between adjacent electrodes was about 50 μm.

And sample 2 was prepared by forming the same transparent electrode pattern as the transparent electrode pattern in sample 1 on the refractive index compensation layer 7 formed using the composition of Comparative Example 1.

First, referring to FIG. 17, in Sample 2, it can be seen that the transparent electrode pattern is recognized. When the transparent electrode pattern is formed on the refractive index compensation layer 7 formed using the composition according to Comparative Example 1 that does not include the inorganic particles, it can be seen that the white line is visible in the region adjacent to the light source. It corresponds to a region where no transparent electrode pattern is formed between adjacent transparent electrodes. This white line appears because the refractive index compensation layer 7 having a refractive index of 1.495 does not compensate for the difference in refractive index between the formed and unformed regions of the transparent electrode.

In contrast, referring to FIG. 16, it can be seen that in the sample 1, the transparent electrode pattern is not visually recognized. When the transparent electrode pattern is formed on the refractive index compensation layer 4 formed by using the composition of Example 4 including inorganic particles, the refractive index difference between the formation region of the transparent electrode and the unformed region is different in the refractive index compensation layer 4 having a refractive index of 1.700. By compensating for the transparent electrode is not visible.

While the foregoing has been described with reference to preferred embodiments of the present invention, those skilled in the art will be able to variously modify and change the present invention without departing from the spirit and scope of the invention as set forth in the claims below. It will be appreciated.

Claims

Diacrylate monomers including fluorene;

Photoinitiators; And

Refractive index matching composition comprising inorganic particles.
The method of claim 1,

The inorganic particles are refractive index matching composition consisting of an oxide containing at least one selected from zirconium (Zr), aluminum (Al) and chromium (Cr).
The method of claim 2,

Liquid refractive index of the composition is a refractive index matching composition, characterized in that 1.65 to 1.98.
The method of claim 1,

The inorganic particles are composed of a core formed of an oxide containing titanium (Ti) and barium (Ba) and an oxide covering the core and containing at least one selected from zirconium (Zr), aluminum (Al), and chromium (Cr). Refractive index matching composition formed by the shell.
The method of claim 4, wherein

Liquid refractive index of the composition is a refractive index matching composition, characterized in that 1.68 to 2.18.
The method of claim 1,

The diacrylate monomer composition for refractive index matching, characterized in that it comprises a compound represented by the following formula (1):

[Formula 1]

In Formula 1, Y 1 , Y 2 , Z 1 and Z 2 each independently represent hydrogen or an alkyl group having 1 to 3 carbon atoms, m and n each represent an integer of 1 to 9, the sum of m and n is 2 to 10.
The method of claim 1,

The content of the diacrylate monomer, the photoinitiator and the inorganic particles with respect to the total weight of the composition is 5 to 40% by weight, 0.1 to 5% by weight and 50 to 80% by weight composition for refractive index matching, characterized in that.
The method of claim 1,

A composition for refractive index matching, further comprising a monofunctional acrylate monomer.
The method of claim 8,

The content of the diacrylate monomer, the photoinitiator, the inorganic particles and the monofunctional acrylate relative to the total weight of the composition is 5 to 40% by weight, 0.1 to 5% by weight, 50 to 80% by weight and 1 to 20% by weight, respectively. Refractive index matching composition, characterized in that%.
The method of claim 9,

Liquid refractive index of the composition is a refractive index matching composition, characterized in that 1.65 to 2.18.
The method of claim 1,

A composition for refractive index matching, further comprising a ultraviolet absorber.
The method of claim 11,

The composition of the refractive index matching, characterized in that the content of the ultraviolet absorber relative to the total weight of the composition is 0.1 to 5% by weight.
A base substrate;

A transparent electrode pattern formed on one surface of the base substrate; And

A refractive index compensation layer disposed on one surface of the base substrate on which the transparent electrode pattern is formed to cover an upper surface of the transparent electrode pattern and one surface of the base substrate exposed by the transparent electrode pattern and having inorganic particles dispersed therein; Touch screen substrate.
The method of claim 13,

The solid-state refractive index of the refractive index compensation layer is 1.67 to 2.2, the touch screen substrate.
The method of claim 13,

The inorganic particle is a touch screen substrate made of an oxide containing at least one selected from zirconium (Zr), aluminum (Al) and chromium (Cr).
The method of claim 15,

The solid-state refractive index of the refractive index compensation layer is 1.67 to 2.0, the touch screen substrate.
The method of claim 13,

And the inorganic particles are formed of a core made of an oxide including titanium and barium and a shell covering the core and an oxide including at least one selected from zirconium, aluminum, and chromium.
The method of claim 17,

The solid-state refractive index of the refractive index compensation layer is 1.7 to 2.2, the touch screen substrate.
The method of claim 13,

And a driving part electrically connected to the transparent electrode pattern to apply a current to the transparent electrode pattern.

One surface of the base substrate includes a touch area in which the transparent electrode pattern is formed to detect a user's touch, and a peripheral area adjacent to the touch area and in which the driving unit is formed to detect the user's touch

And the refractive index compensating layer exposes the peripheral area of one surface of the base substrate.
A base substrate;

A refractive index compensation layer formed on one surface of the base substrate and having inorganic particles dispersed therein; And

And a transparent electrode pattern formed on the refractive index compensation layer.
The touch screen substrate of claim 20, wherein the refractive index of the refractive index compensation layer is in the range of 1.67 to 2.2.
The method of claim 20,

The inorganic particle is a touch screen substrate made of an oxide containing at least one selected from zirconium (Zr), aluminum (Al) and chromium (Cr).
The method of claim 22,

The solid-state refractive index of the refractive index compensation layer is 1.67 to 2.0, the touch screen substrate.
The method of claim 20,

The inorganic particles are formed of a core made of an oxide including titanium and barium and a shell formed of a shell covering the core and an oxide including at least one selected from zirconium, aluminum and chromium.
The method of claim 24,

The solid-state refractive index of the refractive index compensation layer is 1.7 to 2.2, the touch screen substrate.
The method of claim 20,

And a driving part electrically connected to the transparent electrode pattern to apply a current to the transparent electrode pattern.

One surface of the base substrate includes a touch area in which the transparent electrode pattern is formed to detect a user's touch, and a peripheral area adjacent to the touch area and in which the driving unit is formed to detect the user's touch

And the driving part is positioned above the refractive index compensation layer formed in the peripheral area.
A display device comprising a display panel and a touch screen panel positioned above the display panel.

The display panel,

Transparent electrode patterns; And

And a refractive index compensation layer having inorganic particles dispersed therein, wherein the refractive index compensation layer covers an upper region of the transparent electrode pattern and a region not formed in the transparent electrode pattern.
The method of claim 27,

The inorganic particle is a touch screen substrate made of an oxide containing at least one selected from zirconium (Zr), aluminum (Al) and chromium (Cr).
The method of claim 27,

And the inorganic particles are formed of a core made of an oxide including titanium and barium and a shell covering the core and an oxide including at least one selected from zirconium, aluminum, and chromium.
A display device comprising a display panel and a touch screen panel positioned above the display panel.

The display panel,

A refractive index compensation layer in which inorganic particles are dispersed; And

And a transparent electrode pattern formed on a surface of the refractive index compensation layer.
The method of claim 30,

The inorganic particle is a touch screen substrate made of an oxide containing at least one selected from zirconium (Zr), aluminum (Al) and chromium (Cr).
The method of claim 30,

And the inorganic particles are formed of a core made of an oxide including titanium and barium and a shell covering the core and an oxide including at least one selected from zirconium, aluminum, and chromium.