WO2015174686A1

WO2015174686A1 - Touch panel

Info

Publication number: WO2015174686A1
Application number: PCT/KR2015/004581
Authority: WO
Inventors: 안기환; 백성호; 임정구
Original assignee: 동우화인켐 주식회사
Priority date: 2014-05-15
Filing date: 2015-05-08
Publication date: 2015-11-19
Also published as: KR20150131610A; TW201546680A

Abstract

The present invention relates to a touch panel and, more particularly, to a touch panel arranged on the visible side of a display panel, the touch panel comprising: a sensing pattern formed on one surface on the visible side of a substrate; a trace arranged on the one surface above an area, which corresponds to an inter-pixel boundary of the display panel, so as to connect the sensing pattern with a pad portion; a metal auxiliary pattern formed on the trace; and a light shielding layer formed on the metal auxiliary pattern, the touch panel thereby not only exhibiting improved touch sensitivity and excellent transmittance, but also being able to minimize the problem of visibility.

Description

Touch panel

The present invention relates to a touch panel.

Typically, the touch panel is a screen panel equipped with a special input device that receives a position when touched by hand. These touch panels can receive input data directly from the screen so that when a person's hand or object touches a character or a specific location on the screen without using a keyboard, the location can be detected and processed by the stored software. In this case, it is configured to be laminated in multiple layers.

In order to recognize the touched portion without degrading the visibility of the image displayed on the screen, the use of the transparent sensing electrode is essential, and typically, a transparent sensing electrode formed in a predetermined pattern is used.

Various transparent sensing electrode structures used in the touch panel have been introduced, and examples thereof include glass-ITO film-ITO film (GFF), glass-ITO film (G1F), and glass-only (G2) structures. .

For example, a structure shown in FIG. 1 may be cited as a conventional transparent sensing electrode structure.

The transparent sensing electrode may be formed of the first sensing pattern 10 and the second sensing pattern 20. The first sensing pattern 10 and the second sensing pattern 20 are disposed in different directions to provide information about the X and Y coordinates of the touched point. Specifically, when a person's hand or an object comes into contact with the transparent substrate, a change in capacitance according to the contact position is caused to the driving circuit via the first sensing pattern 10, the second sensing pattern 20, and the position detecting line. Delivered. Then, the contact position is grasped by the change of the capacitance converted into an electrical signal by the X and Y input processing circuit (not shown) or the like.

In this regard, the first sensing pattern 10 and the second sensing pattern 20 are formed on the same substrate, and each pattern must be electrically connected to sense a touched point. However, since the second sensing patterns 20 are connected to each other, but the first sensing patterns 10 are separated in an island form, a separate connection is required to electrically connect the first sensing patterns 10. An electrode (bridge) 50 is required.

However, since the connection electrode 50 should not be electrically connected to the second sensing pattern 20, the connection electrode 50 should be formed on a different layer from the second sensing pattern 20. In order to show such a structure, an enlarged view of a portion where the connection electrode 50 is formed in the A-A 'cross section of FIG. 1 is shown in FIG. 2.

Referring to FIG. 2, the first sensing pattern 10 and the second sensing pattern 20 are electrically insulated from each other by the insulating layer 30 formed thereon. As described above, since the first sensing pattern 10 needs to be electrically connected, the first sensing pattern 10 may be electrically connected using the connection electrode 50.

In order to connect the first sensing pattern 10 separated in an island form with the connection electrode 50 while being electrically disconnected from the second sensing pattern 20, a contact hole 40 is formed on the insulating layer 30. Afterwards, it is necessary to go through the step of forming a separate connection electrode (50).

As such, the transparent sensing electrode having the connection electrode 50 separately requires a separate process for forming the contact hole 40 and the connection electrode 50, and the first sensing pattern 10 and the 2 may cause a problem that the sensing pattern 20 is electrically shorted, there is a problem that the electrical conductivity is reduced due to the contact resistance between the connection electrode and the sensing pattern.

In order to solve this problem, Korean Laid-Open Patent Publication No. 2010-84263 proposes a structure in which an insulating layer and a contact hole are formed after forming a connection electrode on a substrate first, and then a first sensing pattern and a second sensing pattern are formed. To solve this problem, the number of masks and the complexity of the process were solved.

However, Korean Patent Publication No. 2010-84263 also has to provide a separate connection electrode, it does not fundamentally solve the above problems.

[Preceding technical literature]

[Patent Documents]

(Patent Document 1) Korean Patent Publication No. 2010-84263

An object of the present invention is to provide a touch panel having a high electrical conductivity.

It is another object of the present invention to provide a touch panel having an improved transmittance.

In addition, another object of the present invention is to provide a touch panel with low visibility according to the difference in reflectance for each location.

1. A touch panel disposed on the viewer side of the display panel,

A sensing pattern formed on one side of the viewer's side of the substrate,

A trace disposed on an upper side of a boundary correspondence region between pixels of the display panel and connecting the sensing pattern to a pad part;

A metal auxiliary pattern formed on the trace, and

And a light blocking layer formed on the metal auxiliary pattern.

2. The touch panel of claim 1, wherein the display panel comprises a first black matrix layer defining an inter pixel boundary.

3. In the above 1,

The sensing pattern is disposed spaced apart into a plurality of unit sensing patterns,

The trace extends from each unit sensing pattern to the nearest bezel portion to connect the sensing pattern with the pad portion on the bezel portion.

4. The touch panel of claim 1, further comprising a second black matrix layer disposed adjacent to a trace and a sensing pattern on an upper side of the inter-pixel boundary corresponding area of the one surface.

5. In the above 1, the sensing pattern and the trace independently of each other indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc oxide (IZTO) and cadmium tin oxide (CTO) Touch panel formed of at least one material selected from the group consisting of.

6. The touch panel of claim 1, wherein the sensing pattern and the trace have a thickness of 10 to 150 nm independently of each other.

7. In the above 1, wherein the metal auxiliary pattern is formed of molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium or alloys thereof, the touch panel.

8. In the above 1, wherein the light blocking layer is a third black matrix layer or a metal oxide layer, the touch panel.

9. The touch panel of claim 8, wherein the metal oxide is an oxide of at least one metal selected from the group consisting of molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, and niobium.

10. In the above 8, wherein the metal oxide layer has a refractive index of 1.0 to 3.1, the touch panel.

11. In the above 8, wherein the metal oxide layer has a thickness of 15 to 100nm, the touch panel.

12. The touch panel of claim 8, wherein the third black matrix layer has a thickness of 20 to 5,000 nm.

13. forming a sensing pattern on one surface of the viewer on the viewer's side;

Forming a trace connecting the sensing pattern to a pad part on the one surface;

Forming a metal auxiliary pattern on the trace, and

Forming a light blocking layer on the metal auxiliary pattern;

And wherein the trace is disposed above the boundary correspondence region between the pixels of the display panel.

14. forming a sensing pattern on one surface of the viewer side of the display panel;

Forming a trace on the surface of the display panel, the trace connecting the sensing pattern to a pad unit above the pixel-corresponding region of the display panel;

Forming a metal auxiliary pattern on the trace; And

And forming a light blocking layer on the metal auxiliary pattern.

15. The above 13 or 14,

The sensing pattern is formed to be spaced apart from the plurality of unit sensing patterns,

Wherein the trace extends from each unit sensing pattern to a nearest bezel portion to connect the sensing pattern with a driving circuit on the bezel portion.

16. In the above 13 or 14, the sensing pattern and the trace are indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc oxide (IZTO) and cadmium tin oxide (CTO), respectively Forming from at least one material selected from the group consisting of, the manufacturing method of the touch panel.

17. The method of manufacturing the touch panel of 13 or 14, wherein the sensing pattern and the trace have a thickness of 10 to 150 nm independently of each other.

18. The method of manufacturing the touch panel of 13 or 14, wherein the sensing pattern and the trace are simultaneously formed in one process.

19. The method according to the above 13 or 14, wherein the metal auxiliary pattern is formed of molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium or alloys thereof, the method of manufacturing a touch panel.

20. The method according to the above 13 or 14, further comprising the step of forming a second black matrix layer disposed in contact with the trace and the sensing pattern on the upper side of the inter-pixel boundary of the display panel of the one surface, the manufacturing method of the touch panel .

21. In the above 20, wherein the light blocking layer is a third black matrix layer,

Applying the composition for forming a black matrix layer on the upper side of the inter-pixel boundary region and the metal auxiliary pattern of the display panel of one surface,

And forming the second black matrix layer and the third black matrix layer in the same process.

22. The method of claim 13 or 14, wherein the light blocking layer is an oxide of one or more metals selected from the group consisting of molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium and niobium on the metal auxiliary pattern A method of manufacturing a touch panel, which is formed by vapor deposition on a substrate.

23. The method of manufacturing the above 22, wherein the metal oxide has a refractive index of 1 to 3.1.

24. The method according to the above 13 or 14, wherein the light blocking layer is formed by oxidizing the viewing side surface of the metal auxiliary pattern.

The touch panel of the present invention may be provided with a metal auxiliary pattern to increase the electrical conductivity of the sensing pattern to implement improved touch sensitivity.

In addition, the touch panel of the present invention exhibits a markedly improved transmittance by arranging the metal auxiliary pattern on the black matrix on the pixel portion.

In addition, the touch panel of the present invention can minimize the visibility problem according to the difference in reflectance for each position.

1 is a schematic plan view of a conventional transparent sensing electrode.

2 is a schematic vertical cross-sectional view of a conventional transparent sensing electrode.

3 is a schematic vertical cross-sectional view of a touch panel according to an embodiment of the present invention disposed on one surface of a display panel.

4 is a plan view schematically illustrating an arrangement of a metal auxiliary pattern and a sensing pattern in a touch panel according to an exemplary embodiment of the present invention.

5 is a schematic vertical cross-sectional view of a touch panel according to an embodiment of the present invention disposed on one surface of a display panel.

6 is a schematic vertical cross-sectional view of the laminate of Preparation Examples 1 to 4. FIG.

7 is a schematic vertical cross-sectional view of the laminate of Preparation Example 5. FIG.

The present invention is a touch panel disposed on the viewer side of the display panel, the sensing pattern formed on one surface of the viewer side of the substrate, disposed above the boundary corresponding area between pixels of the display panel on the one surface, and connecting the sensing pattern to the pad unit. By including a trace, a metal auxiliary pattern formed on the trace, and a light blocking layer formed on the metal auxiliary pattern, the present invention relates to a touch panel that can exhibit improved touch sensitivity and excellent transmittance as well as minimize visibility problems.

Touch panel

3 and 5 are schematic vertical cross-sectional views of a touch panel according to an embodiment of the present invention disposed on one surface of a display panel, and FIG. 4 schematically illustrates the arrangement of a metal auxiliary pattern and a sensing pattern in a touch panel according to an embodiment. It is a top view shown by. Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, the following drawings attached to the present specification are intended to illustrate preferred embodiments of the present invention, and together with the contents of the present invention serves to further understand the technical spirit of the present invention, the present invention described in such drawings It should not be construed as limited to matters.

The touch panel 200 of the present invention is disposed on the viewer side of the display panel 100.

The display panel 100 is not particularly limited and may be a liquid crystal panel, an OLED panel, or the like commonly used in the art. The OLED panel may be an RGB OLED panel having red, green, or blue light emitting diodes or a WHITE OLED panel having a white light emitting diode.

When the display panel 100 is a liquid crystal panel or a white OLED panel, the display panel 100 includes a color filter having a color pattern, and the red, green, and blue color patterns are arranged to correspond to the red, green, and blue sub-pixels, respectively, to implement colors. have.

When the display panel 100 is an RGB OLED panel, red, green, and blue light emitting diodes are disposed to correspond to red, green, and blue sub-pixels, respectively, to implement colors.

The display panel 100 may include a first black matrix layer (not shown) that defines a boundary between pixels. The first black matrix layer defines a boundary between each pixel and each sub-pixel, and improves contrast.

The display panel 100 according to the present invention may further include a configuration that is commonly used in the art.

The touch panel 200 according to the present invention includes a sensing pattern 220 formed on one side of the viewer side of the substrate 210.

The sensing pattern 220 provides information about the X coordinate and the Y coordinate of the touched point. Specifically, when a person's hand or an object comes into contact, a change in capacitance depending on the contact position is transmitted to the driving circuit via the sensing pattern 220, the trace 230, and a pad unit (not shown). Then, the contact position is grasped by the change of the capacitance converted into an electrical signal by the X and Y input processing circuit (not shown) or the like.

The pad part (not shown) may be positioned on one side of the viewer side of the substrate 210 and include one or more pads (not shown) connected to each trace 230 and a flexible circuit board (not shown).

The sensing pattern 220 may be applied to a transparent electrode material known in the art without limitation. For example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc tin oxide (IZTO), cadmium tin oxide (CTO), PEDOT (poly (3,4-ethylenedioxythiophene)) , Carbon nanotubes (CNT), graphene (grapheme), and the like, and these may be used alone or in combination of two or more. Preferably indium tin oxide (ITO) may be used.

The thickness of the sensing pattern 220 is not particularly limited, and may be, for example, 10 to 150 nm independently of each other. If the thickness is less than 10nm, the resistance may be high and the touch sensitivity may be lowered. If the thickness is greater than 150nm, the transmittance may be lowered to increase power consumption.

The substrate 210 may be a material that is commonly used in the art without limitation, for example, glass, polyethersulphone (PES), polyacrylate (PAR, polyacrylate), polyether imide (PEI, polyetherimide, polyethylene naphthalate (PEN, polyethyelenen napthalate), polyethylene terephthalate (PET, polyethyelene terepthalate), polyphenylene sulfide (PPS), polyallylate, polyimide, polycarbonate ( PC, polycarbonate), cellulose tri acetate (TAC), cellulose acetate propionate (CAP), and the like.

In addition, the substrate 210 may be one surface of the viewer side of the display panel 100.

The trace 230 is disposed above the boundary corresponding area between pixels of the display panel 100 on the one surface, and connects the sensing pattern 220 to the driving circuit.

A metal auxiliary pattern 240, which will be described later, is formed on the trace 230. When the metal has a high reflectance, the metal may reflect internal light from a light source of the display device to reduce transmittance of the display device.

However, the trace 230 according to the present invention is disposed above the inter-pixel boundary corresponding region of the display panel 100, and the inter-pixel boundary corresponding region of the display panel 100 is the first black matrix layer (not shown). Alternatively, since the internal light is not fundamentally transmitted by the second black matrix layer 260 which will be described later, the transmittance decrease problem caused by the metal auxiliary pattern 240 does not occur.

In the present invention, the arrangement between the unit sensing patterns 220 and the arrangement or direction of the traces 230 connecting the unit sensing patterns 220 to the pad unit are not particularly limited, and are considered in consideration of sheet resistance, touch sensitivity, and the like. May be appropriately selected.

For example, the sensing pattern 220 is disposed to be spaced apart from the plurality of unit sensing patterns 220, and the trace 230 extends from each unit sensing pattern 220 to the nearest bezel part, so that the sensing part is detected on the bezel part. The pattern 220 may be connected to the driving circuit.

When the touch panel 200 is applied to an image display device, the touch panel 200 is divided into a display unit, which is an area where an image is displayed, and a bezel unit, which is an edge area where an image is not displayed. ) Is formed in the display portion, and a circuit or the like is formed in the bezel portion.

As illustrated in FIG. 4, when the trace 230 extends from each unit sensing pattern 220 to the nearest bezel portion, the length of the trace formed on the display portion is shortened, thereby lowering the resistance, thereby improving touch sensitivity.

In FIG. 4, the uppermost row of the sensing patterns 220 are illustrated as extending the metal wires to the left and right bezel portions. However, when the upper bezel portions are closer to each other than the bezel portions on the left and right sides, The wiring may extend to the upper bezel portion.

As illustrated in FIG. 5, the touch panel according to the present invention is adjacent to the trace 230 and the sensing pattern 220 above the boundary corresponding area between the pixels of the display panel 100 on one side of the viewer 210 of the viewer 210. It may further include a second black matrix layer 260 disposed.

The second black matrix layer 260 may be selectively included with the first black matrix layer (not shown) of the display panel 100. Like the first black matrix layer (not shown), the second black matrix layer 260 serves to improve contrast.

The trace 230 may be applied to a transparent electrode material known in the art without limitation. For example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc tin oxide (IZTO), cadmium tin oxide (CTO), etc. are mentioned, These are single or 2 types or more. It can be mixed and used. Preferably indium tin oxide (ITO) may be used.

The thickness of the trace 230 is not particularly limited, and may be, for example, 10 to 150 nm. If the thickness is less than 10nm, the resistance may be high and the touch sensitivity may be lowered. If the thickness is greater than 150nm, the transmittance may be lowered to increase power consumption.

A metal auxiliary pattern 240 is formed on the trace 230.

Indium tin oxide (ITO), which is used as a material of the sensing pattern 220 in a typical touch panel, has excellent transparency but lower electrical conductivity than metal. Accordingly, the touch panel 200 of the present invention may be provided with the metal auxiliary pattern 240 to implement excellent electrical conductivity.

The thickness of the metal auxiliary pattern 240 is not particularly limited, and may be, for example, 10 nm to 1,000 nm. If the thickness is less than 10 nm, the resistance may be high, and if it is more than 1,000 nm, the manufacturing cost may increase.

The metal auxiliary pattern 240 according to the present invention is formed of a metal material. For example, molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium or alloys thereof.

However, since the metal has a high reflectance, the transmittance of the touch panel may be reduced by reflecting light from the light source. However, as described above, since the trace 230 is disposed above the boundary correspondence region between the pixels of the display panel, the metal auxiliary pattern The problem of lowering transmittance by 240 does not occur.

In addition, since the metal auxiliary pattern 240 is formed on the trace 230, the touch sensitivity may be improved by lowering the resistance.

The light blocking layer 250 is formed on the metal auxiliary pattern 240.

When the metal auxiliary pattern 240 is disposed on the trace 230, since the metal has a high reflectance, the metal auxiliary pattern 240 may be recognized by reflecting light from the outside. However, the touch panel according to the present invention may be a metal auxiliary pattern. The light blocking layer 250 is formed on the pattern 240 to minimize the visibility problem of the metal auxiliary pattern 240.

The light blocking layer 250 according to the present invention may be a third black matrix layer or a metal oxide layer.

When the light blocking layer 250 is a third black matrix layer, it is used for forming a black matrix layer including colorants, alkali-soluble resin binders, polyfunctional monomers, photopolymerization initiators, surfactants, solvents, and other additives commonly used in the art. The composition may be formed by applying and curing the composition on the metal auxiliary pattern 240.

When the light blocking layer 250 is a metal oxide layer, it may be formed of a metal oxide known in the art, for example, made of molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, and niobium. It may be formed of an oxide of one or more metals selected from the group.

The metal oxide layer preferably has a refractive index of 1.0 to 3.1 in terms of minimizing the visibility of the metal auxiliary pattern 240. In such a case, even when a transparent metal oxide other than black is used, the visibility of the metal auxiliary pattern 240 may be minimized regardless of the color.

The thickness of the light blocking layer 250 is not particularly limited. For example, when the light blocking layer 250 is a metal oxide layer, the thickness of the light blocking layer 250 may be 10 to 100 nm. If the thickness of the metal oxide layer is less than 10 nm or more than 100 nm, the metal auxiliary pattern 240 may be viewed due to high reflectance.

When the light blocking layer 250 is a black matrix layer, the light blocking layer 250 may have a thickness of about 10 nm to about 5,000 nm. If the thickness of the black matrix layer is less than 10 nm, the metal auxiliary pattern 240 may be visually recognized. If the thickness of the black matrix layer is greater than 5,000 nm, the thickness and the production cost of the touch panel may increase.

According to another embodiment of the present invention, the metal auxiliary pattern 240 may be formed on the sensing pattern 220. Even in such a case, the metal auxiliary pattern 240 may be disposed above the boundary corresponding area between pixels of the display panel, and may be formed in the above-described material and thickness range. Similarly, the light blocking layer 250 is also formed on the metal auxiliary pattern 240 in the above-described material and thickness range.

When the metal auxiliary pattern 240 is further formed on the sensing pattern 220, the touch sensitivity may be further improved, and when connected to the metal auxiliary pattern 240 formed on the trace 230, the touch sensitivity may be improved. Can be maximized.

[Manufacturing Method of Touch Panel]

The present invention also provides a method for manufacturing a touch panel.

Hereinafter, a method of manufacturing a touch panel according to an embodiment of the present invention will be described in detail.

First, the sensing pattern 220 is formed on one surface of the viewer 210 of the viewer 210.

The material of the substrate 210 is not particularly limited, and may be, for example, the substrate 210 formed of a material within the aforementioned range.

The method of forming the sensing pattern 220 is not particularly limited, and a method known in the art may be applied. For example, various thin film deposition techniques such as physical vapor deposition (PVD) and chemical vapor deposition (CVD) may be used. It can be formed by. For example, it may be formed by reactive sputtering, which is an example of physical vapor deposition. Or it may be formed using a photolithography method.

The sensing pattern 220 may be applied to a transparent electrode material known in the art without limitation. For example, indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc tin oxide (IZTO), cadmium tin oxide (CTO), etc. are mentioned, These are single or 2 types or more. It can be mixed and used. Preferably indium tin oxide (ITO) may be used.

The thickness of the sensing pattern 220 is not particularly limited, and may be, for example, 10 to 150 nm. If the thickness of the sensing pattern 220 is less than 10 nm, the resistance may be high, and thus the touch sensitivity may be lowered. If the thickness of the sensing pattern 220 is greater than 150 nm, the transmittance may be decreased to increase power consumption.

Thereafter, a trace 230 for connecting the sensing pattern 220 to the pad part is formed on the one surface.

According to the exemplary embodiment of the present invention, the sensing pattern 220 is formed to be spaced apart from the plurality of unit sensing patterns 220, and the traces 230 are adjacent to the bezel part from each unit sensing pattern 220. It may extend to connect the sensing pattern 220 to the driving circuit on the bezel. In such a case, the length of the trace formed on the display portion is shortened, thereby lowering the resistance, thereby improving touch sensitivity.

The trace 230 may be formed of the same material as the sensing pattern 220, and in such a case, may be simultaneously formed in one process.

Next, a metal auxiliary pattern 240 is formed on the trace 230.

Indium tin oxide (ITO), which is used as a material of the sensing pattern 220 in a typical touch panel, has excellent transparency but lower electrical conductivity than metal. Accordingly, the touch panel of the present invention may be provided with the metal auxiliary pattern 240 to implement excellent electrical conductivity.

The method of forming the metal auxiliary pattern 240 is not particularly limited, and a method known in the art may be applied. For example, various thin film deposition methods such as physical vapor deposition (PVD) and chemical vapor deposition (CVD) may be performed. Can be formed by technology. For example, it may be formed by reactive sputtering, which is an example of physical vapor deposition. Or it may be formed using a photolithography method.

The thickness of the metal auxiliary pattern 240 is not particularly limited, and may be, for example, 10 nm to 1,000 nm. If the thickness is less than 10nm, the resistance is high, the touch sensitivity may be lowered, and if it is more than 1,000nm, the manufacturing cost may increase.

Thereafter, the light blocking layer 250 is formed on the metal auxiliary pattern 240.

When the metal auxiliary pattern 240 is disposed on the sensing pattern 220, since the metal has a high reflectance, the metal auxiliary pattern 240 may be recognized by reflecting light from the outside, but the touch panel according to the present invention may be made of metal. By forming the light blocking layer 250 on the auxiliary pattern 240, the visibility problem of the metal auxiliary pattern 240 may be minimized.

The light blocking layer 250 may be a third black matrix layer or a metal oxide layer.

When the light blocking layer 250 is a third black matrix layer, it is used for forming a black matrix layer including colorants, alkali-soluble resin binders, polyfunctional monomers, photopolymerization initiators, surfactants, solvents, and other additives commonly used in the art. The composition may be formed by applying and curing the metal auxiliary pattern 240, but is not limited thereto.

When the light blocking layer 250 is a metal oxide layer, it may be formed by depositing a metal oxide on the metal auxiliary pattern 240 or by oxidizing the surface of the metal auxiliary pattern 240, but is not limited thereto.

When the light blocking layer 250 is a metal oxide layer, a metal oxide known in the art may be used, and for example, molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, and niobium may be used. The oxide of the 1 or more types of metal chosen from is mentioned.

The thickness of the light blocking layer 250 is not particularly limited. For example, when the light blocking layer 250 is a metal oxide layer, the light blocking layer 250 may be 15 to 100 nm. If the thickness of the metal oxide layer is less than 15 nm or more than 100 nm, the metal auxiliary pattern 240 may be viewed.

In addition, when the light blocking layer 250 is a black matrix layer, the thickness may be 20 to 5,000 nm. When the thickness of the black matrix layer is less than 20 nm, the auxiliary metal pattern 240 may be visually recognized. If the thickness of the black matrix layer is greater than 5,000 nm, the thickness and the production cost of the touch panel may increase.

The touch panel 200 manufactured by including the above steps is disposed such that the traces 230 are positioned above the boundary corresponding area between pixels of the display panel 100.

However, in the case of the metal auxiliary pattern 240, when applied to the image display device, the transmittance of the display device may be reduced by reflecting the internal light from the light source of the display device. However, according to the present invention, the touch panel 200 is disposed on one side of the viewer side of the display panel 100 such that the trace 230 is positioned above the inter-pixel boundary corresponding area of the display panel 100.

The region corresponding to the boundary between pixels of the display panel 100 is a region where the internal light is not transmitted through the first black matrix layer (not shown) or the second black matrix layer 260 described later. ), There is no problem of a decrease in transmittance.

The present invention may further include forming a second black matrix layer 260 in contact with the trace 230 and the sensing pattern 220 above the inter-pixel boundary corresponding area of the display panel 100.

The second black matrix layer 260 may be selectively included with the first black matrix layer (not shown). Like the first black matrix layer (not shown), the second black matrix layer 260 serves to improve contrast.

When the light blocking layer 250 is the third black matrix layer, the second black matrix layer 260 and the third black matrix layer may be formed in the same process. In such a case, instead of separately forming the second black matrix layer 260 for contrast improvement and the third black matrix layer for suppressing the visibility of the metal auxiliary pattern 240, the process efficiency is remarkably increased by simultaneously forming them in one process. It can be improved.

The specific method is not particularly limited and may be, for example, a method of applying the composition for forming the black matrix layer on the upper side of the inter-pixel boundary corresponding region and the metal auxiliary pattern of the display panel.

In addition, the touch panel may be formed through additional processes known in the art.

In addition, the method for manufacturing a touch panel according to another embodiment of the present invention will be described in detail below.

First, the sensing pattern 220 is formed on one side of the viewer side of the display panel 100.

The sensing pattern 220 may be formed by the same method as described above, and may be formed of a thickness and a material in the above-described range.

The display panel 100 may further include a separate substrate 210 on one side of the viewer. The substrate 210 may be a substrate 210 having a material in the above range.

Subsequently, a trace 230 for connecting the sensing pattern 220 to the pad part is formed on an upper side of the pixel corresponding area between the pixels of the display panel 100.

The trace 230 may be formed by the same method as described above, and may be formed of a thickness and a material in the aforementioned range.

As described above, the trace 230 may be formed of the same material as the sensing pattern 220, and in this case, the sensing pattern 220 and the trace 230 may be simultaneously formed in one process.

Thereafter, the metal auxiliary pattern 240 is formed on the trace 230.

Similarly, the metal auxiliary pattern 240 may be formed using a method, a thickness, and a material in the above-described range.

Next, the light blocking layer 250 is formed on the metal auxiliary pattern 240.

The light blocking layer 250 is a third black matrix layer or a metal oxide layer, and may be formed using a method, a thickness, and a material in the above-described range.

The method may further include forming a second black matrix layer 260 in contact with the trace 230 and the sensing pattern 220 above the inter-pixel boundary corresponding area of the display panel 100.

제조예 1-1 내지 1-3Preparation Examples 1-1 to 1-3

A pattern was formed of 35 nm thick indium tin oxide (ITO) (refractive index 1.89) on a glass substrate (refractive index: 1.51), and a metal pattern of 300 nm thick was formed on moltendenum (refractive index 3.78) on the ITO pattern. Thereafter, a light blocking layer was formed of niobium oxide (Nb ₂ O ₅ , a refractive index of 2.28) on the metal pattern to prepare a laminate shown in FIG. 6.

제조예 2-1 내지 2-8Preparation Examples 2-1 to 2-8

A pattern was formed of 35 nm thick indium tin oxide (ITO) (refractive index 1.89) on a glass substrate (refractive index 1.51), and a metal pattern of 300 nm thick was formed on moltendenum (refractive index 3.78) on the ITO pattern.

Thereafter, 110 parts by weight of carbon black on the metal pattern, a copolymer of benzyl (meth) acrylate / (meth) acrylic acid (acid value 110KOHmg / g, molar ratio 70/30, Mw = 30,000) with an alkali-soluble resin binder And 70 parts by weight of a polymer having an allylglycidyl ether added to the copolymer of benzyl (meth) acrylate / (meth) acrylic acid (acid value 80 KOH mg / g, Mw = 22,000), dipentaerythritol as a functional monomer. 50 parts by weight of hexaacrylate, 20 parts by weight of 2-benzyl-2- (dimethylamino) -1- (4-morpholinophenyl) butyl-1-one as a photopolymerization initiator, 2,2'-bis (o-chloro Phenyl) -4,4,5,5'-tetraphenyl-1,2'-biimidazole 10 parts by weight, 4 parts by weight of 4,4-bis (diethylamino) benzophenone, and mercaptobenzothiazole 5 9 parts by weight of a polyester-based dispersant as a dispersant as an additive, 0.53 part by weight of 3-methacryloxypropyltrimethoxysilane as an adhesion promoter, and a leveling agent for imparting ink repellency. Kongye or fluoro ringye Surfactant 1 parts by weight of a solvent of propylene glycol monomethyl ether acetate 440 parts by weight of ethoxy ethyl propionate 290 parts by weight were mixed. Then, the mixture was stirred for 5 hours to form a black matrix layer with a coloring ink prepared to prepare a laminate shown in FIG.

제조예 3-1 내지 3-3Preparation Examples 3-1 to 3-3

A laminate shown in FIG. 6 was manufactured in the same manner as in Preparation Example 1, except that the light blocking layer was formed of Al ₂ O ₃ to Al ₂ O ₅ (refractive index 1.66).

제조예 4-1 내지 4-3Preparation Examples 4-1 to 4-3

A laminate shown in FIG. 6 was manufactured in the same manner as in Preparation Example 1, except that the light blocking layer was formed of Cu ₂ O to Cu ₄ O (refractive index 3.10).

제조예 5-1 내지 5-6Preparation Examples 5-1 to 5-6

A laminate as shown in FIG. 7 was prepared in the same manner as in Preparation Example 1, except that the light blocking layer was not formed.

실험예Experimental Example

(1) ITO 패턴의 저항 측정(1) resistance measurement of ITO pattern

The laminates of Reference Examples 1 to 15 were prepared to measure the resistance of the ITO pattern.

The laminate was deposited on a glass substrate with an ITO pattern having a thickness of 5 cm x 30 μm, and a molybdenum pattern was deposited with a thickness as shown in Table 1 below.

Thereafter, the resistance is measured by a multimeter, and the relative resistance is described in Table 1 below.

Table 1

Referring to Table 1, it can be seen that the resistance is lower as the thickness of the sensing pattern is increased and the thickness of the metal pattern is increased.

(2) 반사율 측정(2) reflectance measurement

In the laminates of Preparation Examples 1 to 5, the reflectance in the wavelength range of 400 nm to 700 nm at the A position shown in FIGS. 6 and 7 was measured by ST-4000 (KMAC).

TABLE 2

Referring to Table 2, in the laminates of Preparation Examples 1 to 4, the reflectance at the A position where the metal pattern was formed by the metal oxide layer or the black matrix layer was lowered.

However, the laminate of Production Example 5 had a very high reflectance at the A position.

[Description of the code]

100: display panel 200: touch panel

210: substrate 220: sensing pattern

230: trace 240: metal auxiliary pattern

250: light blocking layer 260: second black matrix layer

Claims

A touch panel disposed on the viewer side of the display panel,

A sensing pattern formed on one side of the viewer's side of the substrate,

A trace disposed on an upper side of a boundary correspondence region between pixels of the display panel and connecting the sensing pattern to a pad part;

A metal auxiliary pattern formed on the trace, and

And a light blocking layer formed on the metal auxiliary pattern.
The touch panel of claim 1, wherein the display panel includes a first black matrix layer defining an inter pixel boundary.
The method according to claim 1,

The sensing pattern is disposed spaced apart into a plurality of unit sensing patterns,

The trace extends from each unit sensing pattern to the nearest bezel portion to connect the sensing pattern with the pad portion on the bezel portion.
The touch panel as set forth in claim 1, further comprising a second black matrix layer disposed adjacent to the trace and the sensing pattern on the inter-pixel boundary corresponding area of the one surface.
The method of claim 1, wherein the sensing pattern and the trace are independently formed of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc oxide (IZTO), and cadmium tin oxide (CTO). A touch panel formed of at least one material selected from the group.
The touch panel of claim 1, wherein the sensing pattern and the trace are 10 to 150 nm in thickness independently of each other.
The touch panel of claim 1, wherein the metal auxiliary pattern is formed of molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, or an alloy thereof.
The touch panel as set forth in claim 1, wherein the light blocking layer is a third black matrix layer or a metal oxide layer.
The touch panel as set forth in claim 8, wherein the metal oxide is an oxide of at least one metal selected from the group consisting of molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, and niobium.
The touch panel as set forth in claim 8, wherein the metal oxide layer has a refractive index of 1.0 to 3.1.
The touch panel as set forth in claim 8, wherein the metal oxide layer has a thickness of 15 to 100 nm.
The touch panel of claim 8, wherein the third black matrix layer has a thickness of 20 to 5,000 nm.
Forming a sensing pattern on one surface of the viewer at the viewer;

Forming a trace connecting the sensing pattern to a pad part on the one surface;

Forming a metal auxiliary pattern on the trace, and

Forming a light blocking layer on the metal auxiliary pattern;

And wherein the trace is disposed above the boundary correspondence region between the pixels of the display panel.
Forming a sensing pattern on one surface of the viewer side of the display panel;

Forming a trace on the surface of the display panel, the trace connecting the sensing pattern to a pad unit above the pixel-corresponding region of the display panel;

Forming a metal auxiliary pattern on the trace; And

And forming a light blocking layer on the metal auxiliary pattern.
The method according to claim 13 or 14,

The sensing pattern is formed to be spaced apart from the plurality of unit sensing patterns,

And the traces extend from each unit sensing pattern to the nearest bezel portion to connect the sensing pattern with the pad portion on the bezel portion.
15. The method of claim 13 or 14, wherein the sensing pattern and the trace is made of indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium zinc oxide (IZTO) and cadmium tin oxide (CTO), respectively. A method of manufacturing a touch panel, which is formed of at least one material selected from the group.
The method of claim 13, wherein the sensing pattern and the trace are 10 to 150 nm in thickness independently of each other.
The method of claim 13, wherein the sensing pattern and the trace are simultaneously formed in one process.
The method of claim 13, wherein the metal auxiliary pattern is formed of molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium, or an alloy thereof.
The method of claim 13, further comprising forming a second black matrix layer disposed above the inter-pixel boundary corresponding region of the display panel on the one surface to contact the trace and the sensing pattern.
The method of claim 20, wherein the light blocking layer is a third black matrix layer,

Applying the composition for forming a black matrix layer on the upper side of the inter-pixel boundary region and the metal auxiliary pattern of the display panel of one surface,

And forming the second black matrix layer and the third black matrix layer in the same process.
The method according to claim 13 or 14, wherein the light blocking layer is deposited on the metal auxiliary pattern oxide of at least one metal selected from the group consisting of molybdenum, silver, aluminum, copper, palladium, gold, platinum, zinc, tin, titanium and niobium. The manufacturing method of a touch panel formed by making a metal.
The method of claim 22, wherein the metal oxide has a refractive index of 1 to 3.1.
The manufacturing method of a touch panel according to claim 13 or 14, wherein the light blocking layer is formed by oxidizing the viewing side surface of the metal auxiliary pattern.