KR20140069072A - Electroconductive sheet, touch panel, liquid crystal display device, and organic el display - Google Patents

Abstract

The conductive sheet 12 formed on the transparent substrate 20 has a plurality of first transparent conductive patterns 30 and a plurality of second transparent conductive patterns 40. [ Each of the first transparent conductive patterns 30 is disposed along a first direction, and each of the second transparent conductive patterns 40 is disposed along a second direction orthogonal to the first direction. The first transparent conductive pattern 30 has a first connecting portion 34 for electrically connecting between the plurality of first sensing portions 32. The second transparent conductive pattern 40 has a plurality of second sensing portions 42 and a second connecting portion 44 for electrically connecting the plurality of second sensing portions 42. In order to electrically isolate the first sensing portion 32, the second sensing portion 42, and the dummy pattern 60, an insulating line 70 exists to surround the dummy pattern 60. A dummy insulation line 80 having substantially the same shape as the insulation line 70 is formed in the first sensing portion 32. The conductive sheet 12 can prevent the pattern from being seen by light scattering.

Description

TECHNICAL FIELD [0001] The present invention relates to a conductive sheet, a touch panel, a liquid crystal display device, and an organic EL display (electrochemical sheet, touch panel, liquid crystal display device,

TECHNICAL FIELD The present invention relates to a conductive sheet of a transparent conductive film containing conductive fibers, a touch panel including the conductive sheet, a liquid crystal display device having the touch panel, and an organic EL display, and more particularly to a conductive sheet, A touch panel including a sheet, a liquid crystal display device having the touch panel, and an organic EL display.

Recently, a touch panel is provided on the surface of an image display device of an electronic device such as a PDA (portable information terminal) or a mobile phone. The touch panel detects the position of the fingertip by touching the screen with a finger.

A capacitance type is known as a method of a touch panel. The capacitive touch panel includes a plurality of first transparent electrodes (X electrode groups) extending in a first direction (X direction) and a plurality of second transparent electrodes (Y electrodes) extending in a second direction Y electrode group) and has a conductive sheet on a transparent substrate, and detects the position by a change in capacitance between the electrodes.

Patent Document 1 discloses forming a dummy pattern in the gap by making the X electrode smaller than the Y electrode in order to make the electrostatic capacitance of one line of the X electrode equal to that of the Y electrode.

Patent Document 2 discloses forming a dummy pattern having a refractive index equivalent to that of the X electrode and the Y electrode in the gap sandwiched between the X electrode and the Y electrode in order to obscure the presence of the translucent conductive sheet.

Japanese Laid-Open Patent Publication No. 2010-009439 Japanese Laid-Open Patent Publication No. 2010-002958

 Information DISPLAY, Vol. 26, No. 3, pp. 16-21

Recently, a touch panel is mounted on a display device such as a liquid crystal panel or an electronic paper as an input device (Patent Document 1, Patent Document 2). As a configuration of the touch panel, various types such as a resistance film type, a surface acoustic wave type, and a capacitance type are known. However, a capacitance type is known as a method which can be multi-point touchable and can be made large- A capacitive touch panel using ITO (indium tin oxide) as a material is disclosed (see Non-Patent Document 1).

However, since indium, which is a raw material of ITO, has a limitation in stable supply at a high cost and requires a vacuum process to manufacture a thin film, manufacturing cost is high, and the ITO film is weak and has poor bending resistance. Therefore, alternative materials such as metal nanowires, carbon nanotubes, PEDOT, and polyaniline have been proposed.

It is known that a transparent conductive film using silver nanowires, which has been studied as a transparent electrode of a touch panel, exhibits light scattering property and accordingly has a polarization dissolving property because it is a conductive film in which fine particles are dispersed.

In an on-cell type touch panel having a liquid crystal display, a silver nanowire layer is disposed between polarizers because a touch panel is inserted between polarizers of Cross Nicol. In the touch panel, the X electrode and the Y electrode are electrically separated by an insulating line. Typically, an isolation line is formed by removing the silver nanowire layer in a line. Therefore, a region of a sparse and a region of a tight (dense) insulation line are formed on the touch panel. In the region where the insulated line is swollen, the amount of the silver nanowires remaining becomes large, thereby increasing light leakage. On the other hand, in the region where the insulating line is dense, the amount of silver nanowires remaining is small, and therefore, light leakage is reduced. The difference in light leakage caused by the tightness of the insulation line causes a phenomenon of pattern appearance. Pattern visualization is a phenomenon in which a point where a transparent electrode exists and a point where a transparent electrode does not exist are viewed when the touch panel is viewed from a plane. When such a pattern appearance occurs, an image in which the pattern of the transparent electrode of the touch panel and the image displayed by the liquid crystal display device are overlapped is visually observed, which results in a problem that the display quality is deteriorated. Particularly in this task, when the liquid crystal display device displays black, pattern visibility is likely to occur.

In an organic EL (electroluminescence) display, in many cases, a circular polarizer is provided on the entire surface in order to reduce the reflection of external light by the metal portion of the organic EL element. When a touch panel using conductive fibers is disposed between the organic EL element and the circular polarizer, the polarized state of the circularly polarized light is disturbed and the reflection of external light can not be prevented. For this reason, for example, when the organic EL display displays black, the point where the insulating line is dense appears white because the reflection of the external light is small, and the point where the insulating line is formed becomes white. As a result, pattern appearance occurs, causing a problem of deterioration of display quality. The appearance of the pattern due to the reflection of external light in the organic EL display causes the same problem as the light leakage in the liquid crystal display device.

Particularly, the touch panels described in Patent Documents 1 and 2 have a dummy pattern. In order to define a dummy pattern on the touch panel, an insulation line is required. In the conductive sheets of Patent Documents 1 and 2, the insulating lines are liable to be dense and the phenomenon of pattern visibility tends to occur.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a transparent conductive film containing conductive fibers, a conductive sheet for preventing pattern appearance due to light scattering, a touch panel including the conductive sheet, A liquid crystal display device having the same, and an organic EL display.

When a film containing conductive fibers is used as a transparent conductive film, it has been found that pattern appearance due to strong light scattering becomes a problem as compared with an inorganic oxide electrode such as ITO (Indium Tin Oxide) generally used. In a touch panel, in many cases, a contact position is specified by an electrode extending in a first direction of the display portion and an electrode extending in a second direction perpendicular to the first direction.

The region where the transparent conductive film containing the conductive fiber is present appears white because of the light scattering property by the conductive fiber and the region where the transparent conductive film is not present appears to be dark because there is no scattering. Due to such a difference, the transparent conductive film may appear as a pattern having a shape, which may lead to deterioration of display quality. This phenomenon is a problem that does not occur in conventional transparent electrodes such as ITO and it can be seen that only a transparent electrode in which conductive fibers are dispersed is a problem.

As a result of intensive studies by the inventors on the basis of the above knowledge, it has been found that by arranging the dummy insulating line at a place where the density of the insulating line is low, the in-plane density of light scattering can be made uniform, I found that I could suppress it.

A conductive sheet according to an embodiment of the present invention is a conductive sheet comprising a transparent substrate, a plurality of first transparent conductive patterns arranged in a first direction on the transparent substrate, the insulating line comprising no conductive fibers, A first transparent conductive pattern having a plurality of first sensing parts containing conductive fibers and a plurality of first connecting parts electrically connecting between the plurality of first sensing parts and containing conductive fibers; A plurality of second transparent conductive patterns arranged in a second direction orthogonal to the first direction on the transparent substrate, wherein the second transparent conductive pattern includes an insulating line that does not contain conductive fibers, And a plurality of second connecting portions including conductive fibers for electrically connecting between the plurality of second sensing portions And a dummy insulating line which is formed in at least one region of the plurality of first sensing portions and the plurality of second sensing portions and does not contain conductive fibers, The first transparent conductive pattern and the second transparent conductive pattern are disposed so that the plurality of first sensing portions and the plurality of second sensing portions do not substantially overlap when viewed in plan.

A conductive sheet according to another aspect of the present invention includes a transparent substrate, a plurality of first transparent conductive patterns arranged in the first direction on the transparent substrate, the insulating lines including no conductive fibers, A first transparent conductive pattern having a plurality of first sensing parts containing conductive fibers and a plurality of first connecting parts electrically connecting between the plurality of first sensing parts and containing conductive fibers; A plurality of second transparent conductive patterns arranged in a second direction orthogonal to the first direction on the transparent substrate, wherein the second transparent conductive pattern includes an insulating line that does not contain conductive fibers, And a plurality of second connecting portions electrically connecting between the plurality of second sensing portions and containing conductive fibers, A dummy pattern formed between each of the first sensing portions and the plurality of second sensing portions when the transparent substrate is viewed in a plane and a dummy pattern formed between the first sensing portion and the plurality of second sensing portions, And a dummy insulating line not containing conductive fibers in at least one region of the dummy pattern, wherein when the transparent substrate is viewed from a plane, the plurality of first transparent conductive patterns and the plurality of The two transparent conductive patterns are arranged such that the plurality of first sensing portions and the plurality of second sensing portions do not substantially overlap.

Preferably, the region where the dummy insulating line is formed is a region having the largest area.

Preferably, the dummy insulating line is disposed in a region in the display region where the in-plane distribution density of the insulating line is the lowest.

Preferably, the dummy insulating line is wave-like.

Preferably, the conductive fibers are silver nanowires.

Preferably, the transparent conductive pattern contains the conductive fibers and a binder.

The touch panel according to another aspect of the present invention has the conductive sheet.

Preferably, the touch panel further comprises a polarizing plate disposed on one side of the transparent substrate.

A liquid crystal display device according to another aspect of the present invention includes a liquid crystal display, the touch panel disposed on one side of the liquid crystal display, and a polarizing plate disposed on the other side of the liquid crystal display.

An organic EL display according to another aspect of the present invention includes an organic EL element, a circularly polarizing plate, and the touch panel disposed between the circularly polarizing plate and the organic EL element.

According to the present invention, in a transparent conductive film containing conductive fibers, it is possible to prevent a pattern appearance due to light scattering. In addition, a high-quality touch panel, a liquid crystal display, and an organic EL display using conductive fibers as a conductive sheet can be realized.

1 is a plan view of a conductive sheet according to a first embodiment;
2 is a plan view of a conductive sheet according to a second embodiment;
3 is a plan view of the conductive sheet according to the third embodiment.
4 is a plan view of a conductive sheet according to a fourth embodiment;
5 is a plan view of a conductive sheet according to a fifth embodiment;
6 is a schematic configuration diagram of a liquid crystal display device including a touch panel.
7 is a schematic structural view of an organic EL display including a touch panel.

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. The present invention will be described by the following preferred embodiments, but can be modified in many ways without departing from the scope of the present invention, and other embodiments other than the present embodiment can be used. Accordingly, all modifications within the scope of the present invention are included in the claims.

Hereinafter, the touch panel of the present embodiment will be described with reference to Figs.

[First Embodiment]

The touch panel 10 has a conductive sheet 12. The conductive sheet 12 includes a transparent substrate 20 and a plurality of first transparent conductive patterns 30 and a plurality of second transparent conductive patterns 40 formed on the transparent substrate 20. [ Each first transparent conductive pattern 30 is disposed along a first direction (Y direction), and each second transparent conductive pattern 40 is disposed along a second direction (X direction) perpendicular to the first direction.

The first transparent conductive pattern 30 has a plurality of first sensing portions 32 and a first connecting portion 34 for electrically connecting the plurality of first sensing portions 32. The first sensing portion 32 has a rhombic shape and the first connecting portion 34 has a narrow strip shape. The first connecting portion 34 is formed on the insulating film 50 formed on the second connecting portion 44. For the first transparent conductive pattern 30, the first sensing portion 32 and the first connecting portion 34 are formed separately. Further, the insulating film 50 is required to have transparency. Therefore, as the material of the insulating film 50, for example, SiO ₂ , SiO x, SiN x, and SiO x N y are used as the inorganic material, and acrylic resin, for example, is used as the organic material.

The second transparent conductive pattern 40 has a plurality of second sensing portions 42 and a second connecting portion 44 for electrically connecting the plurality of second sensing portions 42. The second sensing portion 42 has a rhombic shape and the second connecting portion 44 has a narrow width shape. For the second transparent conductive pattern 40, the second sensing portion 42 and the second connecting portion 44 are integrally formed.

The first transparent conductive pattern 30 and the second transparent conductive pattern 40 are disposed such that the first sensing portion 32 and the second sensing portion 42 do not overlap with each other in plan view. On the other hand, the first connecting portion 34 and the second connecting portion 44 intersect in a plan view. However, the first connection portion 34 and the second connection portion 44 are electrically separated from each other by the insulating film 50.

By arranging the first transparent conductive pattern 30 and the second transparent conductive pattern 40 as described above, a so-called regularly arranged deformed diamond pattern is formed. The first transparent conductive pattern 30 and the second transparent conductive pattern 40 are both composed of a transparent conductive film containing conductive fibers and a binder.

The structure of the conductive fiber is not particularly limited and may be appropriately selected according to the purpose, but it is preferable that the structure is either a solid structure or a hollow structure. Here, the fiber having a solid structure may be referred to as a wire, and the fiber having a hollow structure may be referred to as a tube.

Conductive fibers having an average short axis length of 5 nm to 1,000 nm and an average major axis length of 1 mu m to 100 mu m are sometimes referred to as " nanowires ".

In addition, the average short axis length is 1 nm to 1,000 nm and the average major axis length is 0.1 mu m to 1,000 mu m. The conductive fibers having a hollow structure are sometimes called " nanotubes ".

The material of the conductive fiber is not particularly limited and may be appropriately selected depending on the purpose, but it is preferably at least one of metal and carbon. Among them, the conductive fiber is preferably a metal nanowire, a metal A carbon nanotube, a nanotube, and a carbon nanotube.

From the viewpoints of transparency and haze, the average short axis length is preferably 50 nm or less.

As the binder, an alkali-soluble resin having a group (for example, a carboxyl group, a phosphoric acid group, a sulfonic acid group or the like) promoting at least one alkali solubility in a molecule (preferably a molecule that forms an acrylic copolymer- .

As the material of the transparent substrate 20, for example, a transparent glass substrate such as alkali-free glass or soda glass, or a transparent synthetic resin substrate such as PET, PEN, PES, or the like can be used. From the viewpoints of transparency and dimensional stability, it is preferable to use alkali-free glass, PET, and PEN.

When the first transparent conductive pattern 30 and the second transparent conductive pattern 40 are compared, the area of the first sensing portion 32 is larger than the area of the second sensing portion 42, and they are different in size. This is because the characteristics required for the first transparent conductive pattern 30 and the second transparent conductive pattern 40 are different from each other, for example, from the requirement of the position detecting integrated circuit side.

As a result, the gap between the first sensing unit 32 and the second sensing unit 42 is larger than that of the conductive sheet having the same size as the first sensing unit and the second sensing unit. In order to fill the gap, a dummy pattern 60 containing a binder and conductive fibers is formed. By forming the dummy pattern 60, the area obtained by adding the second sensing part 42 and the dummy pattern 60 becomes substantially the same size as the area of the first sensing part 32. [ It is possible to solve the problem of the pattern appearance caused by the different sizes of the first sensing unit 32 and the second sensing unit 42. [

However, in order to electrically isolate the first sensing portion 32, the second sensing portion 42, and the dummy pattern 60, the insulating line 70 exists so as to surround the dummy pattern 60. Since the insulating line 70 is an area free of conductive fibers, the area of the insulating line 70 appears to be dark because there is no light scattering. If the area of the second sensing portion 42 is small, the distance between the opposing insulating lines 70 becomes short. Looking at the second sensing portion 42 along the X direction, it appears that a black line is present by the opposing insulation line 70. [ On the other hand, when the first sensing unit 32 is viewed along the X direction, the area of the first sensing unit 32 is large. As described above, pattern visibility tends to occur due to the tightness of the insulating line 70 without conductive fibers.

Thus, in the present embodiment, the dummy insulating line 80 having the same shape as the insulating line 70 is formed in the first sensing portion 32. The reason why the dummy insulation line 80 is formed in the first sensing unit 32 is that the first sensing unit 32, the second sensing unit 42, and the dummy pattern 60 ) Is large and the amount containing the conductive fibers is the greatest. Here, the insulation line 70 refers to a region sandwiched between the dummy pattern 60 and the second sensing portion 42. The dummy insulating line 80 is a region formed by removing the first sensing portion 32, and the dummy insulating line 80 does not contain conductive fibers. As described above, the V-shaped dummy insulation line 80 is formed in the sweep area of the insulation line 70, that is, the first sensing portion 32, which is almost the same as the insulation line 70. Therefore, when the entire conductive sheet 12 is viewed, the density of the insulated line which is a region free from the so-called conductive fibers is eliminated, the in-plane density of light scattering can be made uniform, and pattern visibility can be suppressed.

It is preferable that the insulating line 70 and the dummy insulating line 80 have the same total area.

It is preferable that the dummy insulating line 80 is disposed in a region where the in-plane distribution density of the insulating line 70 in the display region is the lowest.

In other words, the in-plane distribution of the insulating line 70 which confirms the first sensing portion 32 and the second sensing portion 42 in the display region is checked to determine the region where the density of the insulating line 70 is the smallest A dummy insulating line 80 is disposed. As a result, the in-plane distribution of the entire insulating line group including the insulating line 70 and the dummy insulating line 80 becomes uniform as compared with before the dummy insulating line 80 is disposed. Thus, the visibility of the display device can be improved.

The insulation line 70 electrically separates the first transparent conductive pattern 30 and the second transparent conductive pattern 40 and electrically connects the first sensing portion 32, the second sensing portion 42, Refers to an area that is required for the touch panel 10 arranged in a line that does not contain the conductive fibers and defines the first connecting portion 34. [

The dummy insulating line 80 means a portion arranged in a line that does not contain conductive fibers and does not affect the essential effect as an electrode even if conductive fibers are present in the portion. Therefore, this is not an area required for the touch panel 10.

In order to suppress the appearance of the pattern, it is preferable that the insulation line 70 and the dummy insulation line 80 constituting the insulation line group have a width of 50 mu m or less, more preferably 30 mu m or less, Mu] m or less.

Also, since the dummy insulation line 80 is not intended for electrical isolation, the first sensing portion 32 is not electrically separated by the dummy insulation line 80. [

[Second embodiment]

Fig. 2 shows a plan view of the second embodiment. The same components as those in the first embodiment are denoted by the same reference numerals and description thereof may be omitted.

The touch panel 10 includes a conductive sheet 12 formed on a transparent substrate 20. The conductive sheet 12 includes a transparent substrate 20, a plurality of first transparent conductive patterns 30, and a plurality of second transparent conductive patterns 40. Each first transparent conductive pattern 30 is disposed along a first direction (Y direction), and each second transparent conductive pattern 40 is disposed along a second direction (X direction) perpendicular to the first direction.

The first transparent conductive pattern 30 has a plurality of first sensing portions 32 and a first connecting portion 34 for electrically connecting the plurality of first sensing portions 32. The first sensing portion 32 has a rhombic shape, and the first connecting portion 34 has a narrow width shape. The first connecting portion 34 is formed on the insulating film 50 formed on the second connecting portion 44.

The second transparent conductive pattern 40 has a plurality of second sensing portions 42 and a second connecting portion 44 for electrically connecting the plurality of second sensing portions 42. The second sensing portion 42 has a rhombic shape and the second connecting portion 44 has a narrow width shape. For the second transparent conductive pattern 40, the second sensing portion 42 and the second connecting portion 44 are integrally formed.

A dummy pattern 60 is formed between the first sensing unit 32 and the second sensing unit 42. In order to electrically isolate the first sensing portion 32, the second sensing portion 42 and the dummy pattern 60, there is an insulating line 70 surrounding the dummy pattern 60.

A dummy insulation line 80 is formed in the first sensing portion 32. The dummy insulation line 80 is formed to be directed in a direction perpendicular to the insulation line 70. The dummy insulation line 80 is formed to have a substantially same shape as the insulation line 70 but different from the first embodiment.

Since the dummy insulating line 80 is formed in the first sensing portion 32 where the insulating line 70 is a sweep area, when the entire conductive sheet 12 is viewed, the soiling of the insulating line, The in-plane density of the light scattering can be made uniform, and the appearance of the pattern can be suppressed.

Also, since the dummy insulation line 80 is not intended for electrical isolation, the first sensing portion 32 is not electrically separated by the dummy insulation line 80. [ It is preferable that the insulating line 70 and the dummy insulating line 80 have the same total area.

By disposing the dummy insulation line 80, the in-plane distribution of the entire insulation line group including the insulation line 70 and the dummy insulation line 80 is made uniform as compared with before the dummy insulation line 80 is disposed.

[Third embodiment]

Fig. 3 shows a plan view of the third embodiment. The same components as those of the first and second embodiments are denoted by the same reference numerals and the description thereof may be omitted.

The touch panel 10 includes a conductive sheet 12 formed on a transparent substrate 20. The conductive sheet 12 includes a transparent substrate 20, a plurality of first transparent conductive patterns 30, and a plurality of second transparent conductive patterns 40. Each first transparent conductive pattern 30 is disposed along a first direction (Y direction), and each second transparent conductive pattern 40 is disposed along a second direction (X direction) perpendicular to the first direction.

The first transparent conductive pattern 30 has a plurality of first sensing portions 32 and a first connecting portion 34 for electrically connecting the plurality of first sensing portions 32. The first sensing portion 32 has a rhombic shape, and the first connecting portion 34 has a narrow width shape. The first connecting portion 34 is formed on the insulating film 50 formed on the second connecting portion 44.

The second transparent conductive pattern 40 is composed of a plurality of second sensing portions 42 and a second connecting portion 44 electrically connecting between the plurality of second sensing portions 42. The second sensing portion 42 has a rhombic shape and the second connecting portion 44 has a narrow width shape. For the second transparent conductive pattern 40, the second sensing portion 42 and the second connecting portion 44 are integrally formed.

A dummy pattern 60 is formed between the first sensing unit 32 and the second sensing unit 42. In order to electrically isolate the first sensing portion 32, the second sensing portion 42 and the dummy pattern 60, there is an insulating line 70 surrounding the dummy pattern 60.

A dummy insulation line 80 is formed in the first sensing portion 32. The shape of the dummy insulation line 80 in the present embodiment is a rectangle having a long side along the X direction as seen from a plane.

Since the dummy insulating line 80 is formed in the first sensing portion 32 where the insulating line 70 is a sweep area, when the entire conductive sheet 12 is viewed, the soiling of the insulating line, The in-plane density of the light scattering can be made uniform, and the appearance of the pattern can be suppressed.

Also, since the dummy insulation line 80 is not intended for electrical isolation, the first sensing portion 32 is not electrically separated by the dummy insulation line 80. [ It is preferable that the insulating line 70 and the dummy insulating line 80 have the same total area.

By disposing the dummy insulation line 80, the in-plane distribution of the entire insulation line group including the insulation line 70 and the dummy insulation line 80 is made uniform as compared with before the dummy insulation line 80 is disposed.

[Fourth Embodiment]

Fig. 4 shows a plan view of the fourth embodiment. The same components as those of the first to third embodiments are denoted by the same reference numerals and the description thereof may be omitted.

The touch panel 10 includes a conductive sheet 12 formed on a transparent substrate 20. The conductive sheet 12 includes a transparent substrate 20, a plurality of first transparent conductive patterns 30, and a plurality of second transparent conductive patterns 40. Each first transparent conductive pattern 30 is disposed along a first direction (Y direction), and each second transparent conductive pattern 40 is disposed along a second direction (X direction) perpendicular to the first direction.

The first transparent conductive pattern 30 has a plurality of first sensing portions 32 and a first connecting portion 34 for electrically connecting the plurality of first sensing portions 32. The first sensing portion 32 has a rhombic shape, and the first connecting portion 34 has a narrow width shape. The first connecting portion 34 is formed on the insulating film 50 formed on the second connecting portion 44.

The second transparent conductive pattern 40 has a plurality of second sensing portions 42 and a second connecting portion 44 for electrically connecting the plurality of second sensing portions 42. The second sensing portion 42 has a rhombic shape and the second connecting portion 44 has a narrow width shape. For the second transparent conductive pattern 40, the second sensing portion 42 and the second connecting portion 44 are integrally formed.

A dummy pattern 60 is formed between the first sensing unit 32 and the second sensing unit 42. In order to electrically isolate the first sensing portion 32, the second sensing portion 42 and the dummy pattern 60, there is an insulating line 70 surrounding the dummy pattern 60.

A dummy insulation line 80 is formed in the first sensing portion 32. The shape of the dummy insulation line 80 in the present embodiment is a rectangle having a long side along the Y direction as seen from a plane. The dummy insulating line 80 has substantially the same shape as that of the third embodiment, but differs from the third embodiment in the direction of the long side.

Since the dummy insulating line 80 is formed in the first sensing portion 32 where the insulating line 70 is a sweep area, when the entire conductive sheet 12 is viewed, the soiling of the insulating line, The in-plane density of the light scattering can be made uniform, and the appearance of the pattern can be suppressed.

Also, since the dummy insulation line 80 is not intended for electrical isolation, the first sensing portion 32 is not electrically separated by the dummy insulation line 80. [ It is preferable that the insulating line 70 and the dummy insulating line 80 have the same total area.

By disposing the dummy insulation line 80, the in-plane distribution of the entire insulation line group including the insulation line 70 and the dummy insulation line 80 is made uniform as compared with before the dummy insulation line 80 is disposed.

[Fifth Embodiment]

Fig. 5 shows a plan view of the fifth embodiment. The same components as those in the first to fourth embodiments are denoted by the same reference numerals and the description thereof may be omitted.

The touch panel 10 includes a conductive sheet 12 formed on a transparent substrate 20. The conductive sheet 12 includes a transparent substrate 20, a plurality of first transparent conductive patterns 30, and a plurality of second transparent conductive patterns 40. Each first transparent conductive pattern 30 is disposed along a first direction (Y direction), and each second transparent conductive pattern 40 is disposed along a second direction (X direction) perpendicular to the first direction.

The first transparent conductive pattern 30 has a plurality of first sensing portions 32 and a first connecting portion 34 for electrically connecting the plurality of first sensing portions 32. The first sensing portion 32 has a rhombic shape, and the first connecting portion 34 has a narrow width shape. The first connecting portion 34 is formed on the insulating film 50 formed on the second connecting portion 44.

The second transparent conductive pattern 40 is composed of a plurality of second sensing portions 42 and a second connecting portion 44 electrically connecting between the plurality of second sensing portions 42. The second sensing portion 42 has a rhombic shape and the second connecting portion 44 has a narrow width shape. For the second transparent conductive pattern 40, the second sensing portion 42 and the second connecting portion 44 are integrally formed.

A dummy pattern 60 is formed between the first sensing unit 32 and the second sensing unit 42. In order to electrically isolate the first sensing portion 32, the second sensing portion 42 and the dummy pattern 60, there is an insulating line 70 surrounding the dummy pattern 60.

In this embodiment, the first sensing portion 32 and the second sensing portion 42 have substantially the same size (an area when viewed in a plane). The size of the first sensing unit 32 and the second sensing unit 42 is small and the size of the dummy pattern 60 is smaller than that of the first sensing unit 32, the second sensing unit 42, 60).

Therefore, the dummy insulating line 80 is formed in the dummy pattern 60. [ The shape of the dummy insulating line 80 in this embodiment has substantially the same shape as that of the insulating line 70 in plan view.

In the present embodiment, the dummy insulating line 80 is composed of dashed lines. The dummy insulating line 80 is formed in the dummy pattern 60 in which the insulating line 70 is a sweep area so that when the entire conductive sheet 12 is viewed, The in-plane density of the light scattering can be made uniform, and the appearance of the pattern can be suppressed.

Further, since the dummy insulation line 80 is not intended for electrical isolation, it does not need to be on a line. Therefore, it may be a wave line as shown in Fig. As shown in FIG. 5, when the dummy insulating line 80 is formed in the dummy pattern 60, which is a floating electrode, the dummy insulating line 80 has a small effect due to the broken line.

On the other hand, for example, when the dummy insulating line 80 is formed in the first sensing portion 32 used as an electrode, the dummy insulating line 80 is set in a dashed line in order to reduce the deterioration of the conductivity of the electrode .

By disposing the dummy insulation line 80, the in-plane distribution of the entire insulation line group including the insulation line 70 and the dummy insulation line 80 is made uniform as compared with before the dummy insulation line 80 is disposed.

Hereinafter, the materials used in the present embodiment will be described.

≪ Transparent conductive film &

The transparent conductive film contains at least a binder and conductive fibers. Although the binder is not particularly limited, it is preferable that the binder contains a photosensitive compound and, if necessary, other components.

[Conductive fiber]

The material of the conductive fiber is not particularly limited as long as it has conductivity, and can be appropriately selected depending on the purpose. Metal, and carbon. Among them, the conductive fiber is preferably at least one of metal nanowires, metal nanotubes, and carbon nanotubes.

<< Metal nanowire >>

-material-

The material of the metal nanowire is not particularly limited and can be appropriately selected depending on the purpose.

-metal-

Examples of the metal include copper, silver, gold, platinum, palladium, nickel, tin, cobalt, rhodium, iridium, iron, ruthenium, osmium, manganese, molybdenum, tungsten, niobium, tantalum, titanium, bismuth, antimony, Lead, or an alloy thereof. Of these, an alloy of silver and silver is preferable from the viewpoint of excellent conductivity.

Examples of the metal used as the alloy with silver include gold, platinum, osmium, palladium, and iridium. These may be used alone, or two or more kinds may be used in combination.

-shape-

The shape of the metal nanowires is not particularly limited. And can be arbitrarily selected depending on the purpose, for example, a cylindrical shape such as a columnar shape, a rectangular parallelepiped shape, and a columnar shape having a polygonal cross section. In applications where high transparency is required, it is preferable that the polygonal shape of the circumference or cross section is rounded.

The cross-sectional shape of the metal nanowires can be examined by applying a metal nanowire aqueous dispersion on a substrate and observing the cross section with a transmission electron microscope (TEM).

- average short axis length and average long axis length -

The average short axis length (sometimes referred to as "average minor axis diameter", "average diameter") of the metal nanowires is preferably 1 nm to 50 nm, more preferably 10 nm to 40 nm, nm is more preferable.

If the average short axis length is less than 1 nm, the oxidation resistance tends to deteriorate and the durability tends to deteriorate. When the average short axis length is more than 50 nm, scattering due to the metal nanowire may occur, and sufficient transparency may not be obtained.

The average short axis length of the metal nanowires was measured by observing 300 metal nanowires using a transmission electron microscope (TEM (JEM-2000FX, manufactured by Nippon Electronics Co., Ltd.)), The average shortening length was obtained. When the short axis of the metal nanowire is not circular, the short axis length of the metal nanowire is the longest one.

The average major axis length (sometimes referred to as "average length") of the metal nanowires is preferably 1 μm to 40 μm, more preferably 3 μm to 35 μm, and even more preferably 5 μm to 30 μm .

If the average major axis length is less than 1 mu m, it is difficult to form a dense network, and sufficient conductivity may not be obtained. On the other hand, when the average major axis length is more than 40 mu m, metal nanowires are too long to be entangled during manufacture, Aggregation may occur.

The average major axis length of the metal nanowires can be measured by observing 300 metal nanowires using, for example, a transmission electron microscope (TEM; manufactured by Nippon Denshi Co., Ltd., JEM-2000FX) The length was determined. When the metal nanowire is bent, a value calculated from the radius and the curvature is taken as a long axis length in consideration of a circle making the circle.

- Manufacturing Method -

The method for producing the metal nanowires is not particularly limited and may be produced by any method. However, it is preferable that the metal nanowires are produced by heating metal ions in a solvent in which a halogen compound and a dispersing additive are dissolved as described below.

As a method for producing metal nanowires, there are disclosed methods for producing metal nanowires in JP-A-2009-215594, JP-A-2009-242880, JP-A-2009-299162, JP-A-2010-84173, 2010-86714 and the like can be used.

<< Metal Nanotube >>

-material-

The material of the metal nanotube is not particularly limited and may be any metal. For example, the material of the metal nanowire can be used.

-shape-

The shape of the metal nanotubes may be a single layer or a multilayer, but is preferably a single layer because of its excellent conductivity and thermal conductivity.

- average shortening length, average long axis length, thickness -

The thickness (difference in outer diameter and inner diameter) of the metal nanotubes is preferably 3 nm to 80 nm, more preferably 3 nm to 30 nm.

If the thickness is less than 3 nm, the oxidation resistance tends to deteriorate and the durability tends to deteriorate. When the thickness exceeds 80 nm, scattering due to metal nanotubes may occur.

The average major axis length of the metal nanotubes is preferably 1 mu m to 40 mu m, more preferably 3 mu m to 35 mu m, and even more preferably 5 mu m to 30 mu m.

<< Carbon Nanotube >>

The carbon nanotube (CNT) is a material in which a graphitic carbon atomic surface (graphene sheet) is a single layer or a multi-layer coaxial tubular material. The monolayer carbon nanotube is referred to as a single walled nanotube (SWNT), and the multi-walled carbon nanotube is referred to as a multiwalled nanotube (MWNT). In particular, a double-walled carbon nanotube is also referred to as a double walled nanotube (DWNT) . In the conductive fiber used in the present invention, the carbon nanotubes may be a single layer or a multilayer, but a single layer is preferable from the viewpoint of excellent conductivity and thermal conductivity.

- Manufacturing Method -

- aspect ratio -

The aspect ratio of the conductive fibers is preferably 10 or more. The aspect ratio generally means the ratio of the long side to the short side of the fibrous material (the ratio of the average major axis length to the average short axis length).

The method of measuring the aspect ratio is not particularly limited and can be appropriately selected according to the purpose, and examples thereof include a method of measuring with an electron microscope and the like.

In the case where the aspect ratio of the conductive fibers is measured by an electron microscope, whether or not the aspect ratio of the conductive fibers is 10 or more can be confirmed in one field of view of an electron microscope. In addition, the aspect ratio of the entire conductive fiber can be estimated by separately measuring the long axis length and the short axis length of the conductive fiber.

When the conductive fibers are in the shape of a tube, the outer diameter of the tube is used as the diameter for calculating the aspect ratio.

The aspect ratio of the conductive fibers is not particularly limited as long as it is 10 or more and can be appropriately selected according to the purpose, but is preferably 50 to 1,000,000, more preferably 100 to 1,000,000.

If the aspect ratio is less than 10, the network may not be formed by the conductive fibers, so that sufficient conductivity may not be obtained. On the other hand, if the aspect ratio is more than 1,000,000, Are entangled and aggregated, a stable liquid may not be obtained.

- the proportion of conductive fibers having an aspect ratio of 10 or greater -

The proportion of the conductive fibers having an aspect ratio of 10 or more is preferably 50% or more, more preferably 60% or more, and particularly preferably 75% or more, in terms of the volume ratio in the whole conductive composition. The ratio of these conductive fibers is hereinafter sometimes referred to as &quot; ratio of conductive fibers &quot;.

If the ratio of the conductive fibers is less than 50%, the conductive material contributing to conductivity may be reduced to deteriorate the conductivity. In addition, since a dense network can not be formed, voltage concentration occurs and durability is lowered There is a case to discard. In addition, particles having a shape other than the conductive fiber are not preferable because they do not contribute greatly to conductivity and have absorption. Particularly in the case of metal, transparency may be deteriorated in the case where plasmons such as spheres are strongly absorbed.

In the case where the conductive fiber is a silver nanowire, for example, the ratio of the conductive fibers may be determined by separating the silver nanowire and other particles from the silver nanowire aqueous dispersion by using an ICP emission analyzer The amount of silver remaining in the filter paper and the amount of silver that has permeated through the filter paper are measured, respectively, so that the ratio of the conductive fibers can be obtained. The conductive fibers remaining on the filter paper were observed with a TEM to observe the short axis length of 300 conductive fibers and the distribution thereof was examined to confirm that the conductive fibers had a minor axis length of 200 nm or less and a major axis length of 1 mu m or more . Further, the filter paper has a short axis length of 200 nm or less and a long axis length of 1 占 퐉 or more in a TEM image, measuring the longest axis of the particles other than the conductive fibers, and measuring the longest axis of the longest axis of the conductive fiber It is preferable to use the one having the length of

Here, the average short axis length and the average long axis length of the conductive fibers can be obtained by observing a TEM image or an optical microscopic image using, for example, a transmission electron microscope (TEM) or an optical microscope. In the present invention, The average short axis length and the average long axis length of the conductive fibers are obtained by observing 300 conductive fibers by a transmission electron microscope (TEM), and from the average values.

In the following, a conductive layer containing a conductive fiber and a binder (photosensitive resin) in one layer is described. However, a photosensitive layer (patterning material) containing a photosensitive resin is not necessarily integrated with a conductive layer containing conductive fibers, The patterning mask may be formed by laminating the conductive layer and the photosensitive layer (patterning layer), or by transferring the photosensitive layer (patterning layer) after transferring the conductive layer onto the body, or by screen printing the resist material.

<< Binder >>

Examples of the binder include an alkali soluble polymer having a group (for example, a carboxyl group, a phosphoric acid group, a sulfonic acid group and the like) promoting at least one alkali solubility in a molecule (preferably a molecule that forms an acrylic copolymer- Resin can be appropriately selected.

Among these, it is particularly preferable that it is soluble in an organic solvent and can be developed by a weakly alkaline aqueous solution, and has an acid-dissociable group and is alkali-soluble when an acid-dissociable group is dissociated by the action of an acid.

Here, the acid-cleavable group means a functional group which can be dissociated in the presence of an acid.

For the production of the binder, for example, a known radical polymerization method can be applied. Polymerization conditions such as temperature, pressure, kind and amount of a radical initiator, kind of a solvent and the like at the time of producing the alkali-soluble resin by the radical polymerization method can be easily set by those skilled in the art and can be set experimentally .

As the organic polymer, a polymer having a carboxylic acid in the side chain (a photosensitive resin having an acidic group) is preferable.

As the polymer having a carboxylic acid in the side chain, for example, JP-A-59-44615, JP-A-54-34327, JP-A-58-12577, JP-A-54-25957 Methacrylic acid copolymers, acrylic acid copolymers, itaconic acid copolymers, crotonic acid copolymers, crotonic acid copolymers, and crotonic acid copolymers as described in JP-A-59-53836 and JP-A-59-71048, Maleic acid copolymer, partially esterified maleic acid copolymer and the like, acidic cellulose derivatives having a carboxylic acid in the side chain, acid anhydride added to a polymer having a hydroxyl group, etc., and (meth) acryloyl Polymer polymers having a diurnal range are also preferable.

Among these, a multi-component copolymer composed of benzyl (meth) acrylate / (meth) acrylic acid copolymer and benzyl (meth) acrylate / (meth) acrylic acid / other monomer is particularly preferable.

A multi-component copolymer comprising a (meth) acryloyl group in the side chain and a (meth) acrylic acid / glycidyl (meth) acrylate / other monomer is also useful. The polymers may be mixed in any amount and used.

(Meth) acrylate / polystyrene macromonomer / benzyl methacrylate / methacrylic acid copolymer, 2-hydroxy-3-phenoxy (meth) acrylate described in Japanese Patent Laid-Open Publication No. 7-140654 Methyl methacrylate / methacrylic acid copolymer, 2-hydroxyethyl methacrylate / polystyrene macromonomer / methyl methacrylate / methacrylic acid copolymer, 2-hydroxymethyl methacrylate / Hydroxyethyl methacrylate / polystyrene macromonomer / benzyl methacrylate / methacrylic acid copolymer, and the like.

As specific constitutional units in the alkali-soluble resin, (meth) acrylic acid and other monomers copolymerizable with the (meth) acrylic acid are preferable.

Examples of other monomers copolymerizable with (meth) acrylic acid include alkyl (meth) acrylate, aryl (meth) acrylate, vinyl compounds and the like. In these, the hydrogen atom of the alkyl group and the aryl group may be substituted with a substituent.

Examples of the alkyl (meth) acrylate or aryl (meth) acrylate include methyl (meth) acrylate, ethyl (meth) acrylate, propyl (meth) acrylate, butyl (meth) acrylate, (Meth) acrylate, benzyl (meth) acrylate, tolyl (meth) acrylate, naphthyl (meth) acrylate, (Meth) acrylate, dicyclopentenyl (meth) acrylate, dicyclopentenyl (meth) acrylate, dicyclopentenyloxyethyl (meth) acrylate, and the like. These may be used alone, or two or more kinds may be used in combination.

Examples of the vinyl compound include styrene,? -Methylstyrene, vinyltoluene, glycidyl methacrylate, acrylonitrile, vinyl acetate, N-vinylpyrrolidone, tetrahydrofurfuryl methacrylate, polystyrene macromolecule Monomer, polymethylmethacrylate macromonomer, CH ₂ ═CR ¹ R ² , CH ₂ ═C (R ¹ ) (COOR ³ ) in which R ¹ Represents a hydrogen atom or an alkyl group having 1 to 5 carbon atoms, and R &lt; ² &gt; Represents an aromatic hydrocarbon ring having 6 to 10 carbon atoms, and R &lt; ³ &gt; Represents an alkyl group having 1 to 8 carbon atoms or an aralkyl group having 6 to 12 carbon atoms. These may be used alone, or two or more kinds may be used in combination.

The weight average molecular weight of the binder is preferably 1,000 to 500,000, more preferably 3,000 to 300,000, and still more preferably 5,000 to 200,000 from the viewpoints of alkali dissolution rate and film properties.

Here, the weight average molecular weight can be determined by gel permeation chromatography and can be determined using a standard polystyrene calibration curve.

The content of the binder is preferably 40% by mass to 95% by mass, more preferably 50% by mass to 90% by mass, and still more preferably 70% by mass to 90% by mass with respect to the entire conductive layer. When the content is within the above range, both developability and conductivity of the metal nanowire can be achieved.

- Photosensitive compound -

The photosensitive compound means a compound which imparts a function of forming an image by exposure to the conductive layer or imparts the gauge. Specifically, (1) a compound which generates an acid by exposure (a photo-acid generator), (2) a photosensitive quinone diazide compound, and (3) a photo-radical generator. These may be used alone, or two or more kinds may be used in combination. In addition, for adjusting the sensitivity, a sensitizer may be used in combination.

- (1) Photoacid generators -

Examples of the photoacid generator (1) include a photoacid generator, a photoinitiator for photo-radical polymerization, a photo-discoloring agent for a dye, a photo-discoloring agent, or an actinic ray or radiation used for a micro- And a mixture thereof can be appropriately selected and used.

The photoacid generator (1) is not particularly limited and may be appropriately selected depending on the purpose. Examples of the photoacid generator include diazonium salts, phosphonium salts, sulfonium salts, iodonium salts, imidosulfonate, oxime sulfonate, Diazodisulfone, disulfone, o-nitrobenzylsulfonate, and the like. Of these, imidosulfonate, oxime sulfonate and o-nitrobenzylsulfonate, which are sulfonic acid generating compounds, are particularly preferable.

Also, a group or a compound which generates an acid upon irradiation with an actinic ray or radiation is introduced into the main chain or side chain of the resin, for example, the compounds disclosed in U.S. Patent No. 3,849,137, German Patent No. 3914407, Japanese Patent Application Laid-Open Nos. 63-26653, 55-164824, 62-69263, 63-146038, 63-163452, Compounds described in JP-A-62-153853 and JP-A-63-146029 can be used.

Compounds which generate an acid by the light described in each specification such as U.S. Patent No. 3,779,778 and European Patent No. 126,712 can also be used.

- (2) quinone diazide compound -

The above-mentioned (2) quinone diazide compound is obtained, for example, by condensation reaction of 1,2-quinonediazide sulfonyl chlorides, hydroxy compounds, amino compounds and the like in the presence of a dechlorinating acid.

The amount of the photoacid generator (1) and the amount of the quinone diazide compound (2), relative to the total amount of 100 parts by mass of the binder, from the viewpoint of the dissolution rate difference between the exposed portion and the unexposed portion, Preferably 1 part by mass to 100 parts by mass, more preferably 3 parts by mass to 80 parts by mass.

The photoacid generator (1) and the quinone diazide compound (2) may be used in combination.

In the present invention, among the above-mentioned (1) photoacid generators, compounds that generate sulfonic acid are preferable, and the oxime sulfonate compounds described below are particularly preferable from the viewpoint of high sensitivity.

[Chemical Formula 1]

The use of a compound having a 1,2-naphthoquinone diazide group as the above (2) quinone diazide compound provides high sensitivity and good developing properties.

Among the above-mentioned (2) quinone diazide compounds, D in the following compounds is preferably a hydrogen atom or a 1,2-naphthoquinone diazide group in view of high sensitivity.

(2)

- (3) Optical Radical Generator -

The photo radical generator has a function of directly absorbing light or causing photo degradation or decomposition reaction to generate a polymerization activity radical. It is preferable that the photo radical generator has absorption in a wavelength range of 300 nm to 500 nm.

The photo-radical generating agent may be used singly or in combination of two or more species. The content of the photo-radical generating agent is preferably 0.1% by mass to 50% by mass, more preferably 0.5% by mass to 30% by mass, and still more preferably 1% by mass to 20% by mass relative to the total solid content of the coating liquid for the transparent conductive film % Is more preferable. In the above numerical range, good sensitivity and pattern formability are obtained.

The photo-radical generator is not particularly limited and may be appropriately selected according to the purpose. For example, the compound group described in JP-A-2008-268884 can be mentioned. Among them, a triazine-based compound, an acetophenone-based compound, an acylphosphine (oxide) -based compound, an oxime-based compound, an imidazole-based compound and a benzophenone-based compound are particularly preferable from the viewpoint of exposure sensitivity.

As the photo radical generator, it is preferable to use 2- (dimethylamino) -2 - [(4-methylphenyl) methyl] -1- [4- (4-morpholinyl) Butanone, 2-benzyl-2-dimethylamino-1- (4-morpholinophenyl) (2-chlorophenyl) -4,4 ', 5,5'-tetraphenylbiimidazole, N, N-diethylaminobenzophenone, 1,2-octanedione, 1 - [4- (phenylthio) -, 2- (o-benzoyloxime)].

For the coating liquid for the transparent conductive film, a photo radical generator and a chain transfer agent may be used in combination in order to improve the exposure sensitivity.

Examples of the chain transfer agent include N, N-dialkylamino benzoic acid alkyl esters such as N, N-dimethylaminobenzoic acid ethyl ester, 2-mercaptobenzothiazole, 2-mercaptobenzoxazole, 1,3,6-triazine-2,4,6 (1H, 3H, 3H-benzoimidazol-2-yl) (3-mercaptopropionate), pentaerythritol tetrakis (3-mercaptobutyrate), 1,4-bis (3-mercaptopropionate) And aliphatic polyfunctional mercapto compounds such as 3-mercaptobutyryloxy) butane. These may be used alone, or two or more kinds may be used in combination.

The content of the chain transfer agent is preferably 0.01% by mass to 15% by mass, more preferably 0.1% by mass to 10% by mass, still more preferably 0.5% by mass to 5% by mass relative to the total solid content of the coating liquid for the transparent conductive film. Is more preferable.

- Other ingredients -

Examples of the other components include various additives such as a crosslinking agent, a dispersant, a solvent, a surfactant, an antioxidant, an antioxidant, a metal corrosion inhibitor, a viscosity adjusting agent and a preservative.

- Cross-linking agent -

The crosslinking agent is a compound which forms a chemical bond by a free radical or an acid and heat to cure the conductive layer and is, for example, a melamine compound substituted with at least one group selected from a methylol group, an alkoxymethyl group and an acyloxymethyl group, An epoxy compound, an oxetane compound, a thioepoxy compound, an isocyanate compound, or an azide compound; a methacryloyl group-containing compound such as a methacryloyl group Or a compound having an ethylenic unsaturated group containing an acryloyl group and the like. Among them, a compound having an epoxy compound, an oxetane compound, or an ethylenic unsaturated group is particularly preferable from the viewpoints of film properties, heat resistance and solvent resistance.

The oxetane resin may be used singly or in combination with an epoxy resin. Particularly, when it is used in combination with an epoxy resin, the reactivity is high and it is preferable from the viewpoint of improving physical properties of the film.

The content of the crosslinking agent is preferably 1 part by mass to 250 parts by mass, more preferably 3 parts by mass to 200 parts by mass, per 100 parts by mass of the total amount of the binder.

- dispersant -

The dispersant is used for preventing and dispersing the conductive fibers. The dispersing agent is not particularly limited so long as it can disperse the conductive fibers, and can be appropriately selected according to the purpose. For example, a commercially available low-molecular pigment dispersing agent and a high-molecular pigment dispersing agent can be used. Particularly, those having properties of being adsorbed to conductive fibers by a polymeric dispersing agent are preferably used, and examples thereof include polyvinyl pyrrolidone, BYK series (manufactured by Big Chemical), Sol Sparse series (manufactured by Nippon Lubrizol Co., Ltd.) (Manufactured by Ajinomoto Co., Ltd.).

The content of the dispersant is preferably 0.1 parts by mass to 50 parts by mass, more preferably 0.5 parts by mass to 40 parts by mass, and particularly preferably 1 part by mass to 30 parts by mass, relative to 100 parts by mass of the binder.

If the content is less than 0.1 part by mass, the conductive fibers may aggregate in the dispersion. If the content is more than 50 parts by mass, a stable liquid film can not be formed in the coating step, and coating unevenness may occur.

--menstruum--

The solvent is not particularly limited and may be appropriately selected depending on the purpose. Examples of the solvent include propylene glycol monomethyl ether, propylene glycol monomethyl ether acetate, ethyl 3-ethoxypropionate, methyl 3-methoxypropionate, ethyl lactate (3-methoxybutanol, water, 1-methoxy-2-propanol, isopropyl acetate, methyl lactate, N-methylpyrrolidone (NMP), gamma -butyrolactone have. These may be used alone, or two or more kinds may be used in combination.

- Metal corrosion inhibitor -

The metal corrosion inhibitor is not particularly limited and may be appropriately selected depending on the purpose. For example, thiols, azoles and the like are preferable.

By containing the above-mentioned metal corrosion inhibitor, a further excellent rust inhibitive effect can be exhibited.

The metal corrosion inhibitor may be dissolved in a coating solution for a transparent conductive film, dissolved in a suitable solvent, or added as a powder, or a conductive film may be prepared by a coating solution for a transparent conductive film described later and immersed in a metal corrosion inhibitor bath .

Example

Hereinafter, the embodiments of the present invention will be described, but the present invention is not limited to these embodiments at all.

<Sample 1>

The electrode pattern shown in Fig. 1 was formed on the glass to produce a touch panel. A polarizing plate (HLC2-5618, manufactured by SANRITS CO., LTD.) Was attached to one surface of the touch panel using an optical adhesive (PDS1 manufactured by PANAC INDUSTRIES, LTD.). And the polarizing plate was attached to the other surface using an optical adhesive so that the relationship between the polarizing plate and Cross-Nicol was established.

Under a dark room, a planar light source was irradiated from one side of the polarizing plate, and observation was performed with the naked eye on the other side, and as a result, the pattern was not visually recognized.

&Lt; Sample 2 &gt;

The same electrode pattern as the sample 1 was formed on the glass to produce a touch panel. The polarizing plate was attached to the touch panel using an optical adhesive on one side. A UV curable resin (HRJ-21 manufactured by Kyoritsu Chemical Industry Co., Ltd.) was applied to the other surface to bond the polarizing plate on the opposite side of the backlight side to the peeled liquid crystal display.

6 shows a schematic configuration of a liquid crystal display to which a touch panel of sample 2 is attached. The liquid crystal display 100 to which the touch panel is attached includes a polarizing plate 102, a touch panel 10, a liquid crystal cell 108, a polarizing plate 102, and a backlight 110. In the liquid crystal display 100 to which the touch panel is attached, the touch panel 10 is disposed between the two polarizing plates 102. The polarizing plate 102 and the touch panel 10 are attached by an optical adhesive 104. The touch panel 10 and the liquid crystal cell 108 are pasted by the UV curable resin 106. The liquid crystal cell 108 and the polarizing plate 102 are attached to the optical adhesive 104.

Under a dark room, a liquid crystal display with a touch panel was turned on and observed with naked eyes. As a result, the pattern was not visually recognized.

&Lt; Sample 3 &gt;

A conductive sheet as shown in Fig. 1 was formed on a glass, except that a dummy insulating line was not formed, to produce a touch panel. The touch panel was attached to the polarizing plate in the same manner as in the sample 1. As a result of observation in the dark room in the same manner as in Example 1, a spot where the insulation line was formed was white, a point where the insulation line was dense was visually observed in black, and pattern appearance occurred.

<Sample 4>

The same electrode pattern as the sample 3 was formed on the glass to produce a touch panel. The touch panel was attached to the polarizing plate and the liquid crystal display in the same manner as in the sample 2. As a result of observing in the dark room in the same manner as in Sample 2, the spots where the insulation line was sparse were white, and the spots where the insulation line was sparsely scratched and the pattern appearance was observed.

&Lt; Sample 5 &gt;

The polarizing plate (HLC2-5618, manufactured by SAN RITZ CO., LTD.) And a 1/4 wavelength plate (Pure Ace manufactured by Dejin Chemical Co., Ltd.) were placed so that the angle formed by the absorption axis of the polarizing plate and the optical axis of the 1/4 wave plate was 45 degrees. Using a pressure-sensitive adhesive (PDS1, manufactured by PANAC INDUSTRIES, LTD.) To produce a circularly polarizing plate.

The same electrode pattern as the sample 1 was formed on the glass to produce a touch panel. A circular polarizer was attached to the touch panel using an optical adhesive on one side. And UV-curable resin (HRJ-21 manufactured by Kyoritsu Chemical Industry Co., Ltd.) was applied on the other side to the organic EL element.

Fig. 7 shows a schematic configuration diagram of the organic EL display of Sample 5. Fig. The organic EL display 200 includes a circularly polarizing plate 202, a touch panel 10, and an organic EL element 208. The touch panel 10 is disposed between the circularly polarizing plate 202 and the organic EL element 208. [ The circular polarizer 202 and the touch panel 10 are attached by an optical adhesive 204 and the touch panel 10 and the organic EL device are attached by a UV curable resin.

Under a clear room, the organic EL display with the touch panel was turned on and observed with naked eyes. As a result, the pattern was not visually recognized.

&Lt; Sample 6 &gt;

The same electrode pattern as the sample 3 was formed on the glass to produce a touch panel. The touch panel was attached to the circularly polarizing plate and the organic EL device in the same manner as in the sample 5. As a result of observation in the same manner as in Sample 5 under a clear room, a spot where the insulation line was formed was white, and a point where the insulation line was dense was visually observed in black, and pattern appearance occurred.

<Modifications>

In the first to fifth embodiments, the structure in which the conductive sheet has the dummy pattern 60 has been described. However, the constitution of the present invention is not limited to these examples. For example, the conductive sheet may have no dummy pattern 60. The conductive sheet having this simple configuration may be employed when relatively less visibility of the display device is given importance.

10: Touch panel
12: Conductive sheet
20: transparent substrate
30: first transparent conductive pattern
32: first sensing unit
34: first connection
36: Connection
40: second transparent conductive pattern
42: second sensing unit
44: second connection
46:
50: Insulating film
60: dummy pattern
70: Isolation line
80: dummy insulation line

Claims (11)

As the conductive sheet,
A transparent substrate,
A plurality of first transparent conductive patterns arranged in a first direction on the transparent substrate, the first transparent conductive patterns comprising an insulating line containing no conductive fibers, and a plurality of first sensing portions, And a plurality of first connection portions including conductive fibers for electrically connecting between the plurality of first sensing portions,
A plurality of second transparent conductive patterns arranged in a second direction orthogonal to the first direction on the transparent substrate, wherein the second transparent conductive pattern includes an insulating line that does not contain conductive fibers, A second transparent conductive pattern having a plurality of second sensing portions for electrically connecting between the plurality of second sensing portions and a plurality of second connecting portions containing conductive fibers;
And a dummy insulating line formed in at least one region of the plurality of first sensing portions and the plurality of second sensing portions and not containing conductive fibers,
Wherein the first transparent conductive pattern and the second transparent conductive pattern are disposed so that the plurality of first sensing portions and the plurality of second sensing portions do not substantially overlap when the transparent substrate is viewed in a plan view. As the conductive sheet,
A transparent substrate,
A plurality of first transparent conductive patterns arranged in a first direction on the transparent substrate, the first transparent conductive patterns comprising an insulating line containing no conductive fibers, and a plurality of first sensing portions, And a plurality of first connection portions including conductive fibers for electrically connecting between the plurality of first sensing portions,
A plurality of second transparent conductive patterns arranged in a second direction orthogonal to the first direction on the transparent substrate, wherein the second transparent conductive pattern includes an insulating line that does not contain conductive fibers, A second transparent conductive pattern having a plurality of second sensing portions for electrically connecting between the plurality of second sensing portions and a plurality of second connecting portions containing conductive fibers;
A dummy pattern formed between each of the first sensing portions and the plurality of second sensing portions when the transparent substrate is viewed in a plan view,
A dummy insulating line not containing conductive fibers in the plurality of first sensing portions, in the plurality of second sensing portions, and in at least one region of the dummy pattern,
The plurality of first transparent conductive patterns and the plurality of second transparent conductive patterns are arranged such that the plurality of first sensing portions and the plurality of second sensing portions are disposed substantially in a non-overlapping manner when the transparent substrate is viewed in a plane, Conductive sheet. 3. The method according to claim 1 or 2,
Wherein the region in which the dummy insulating line is formed is a region having the largest area. 4. The method according to any one of claims 1 to 3,
Wherein the dummy insulating line is disposed in a region of the display region where the in-plane distribution density of the insulating line is the lowest. 5. The method according to any one of claims 1 to 4,
Wherein the dummy insulating line is in a dashed line. 6. The method according to any one of claims 1 to 5,
Wherein the conductive fibers are silver nanowires. 7. The method according to any one of claims 1 to 6,
Wherein the plurality of first transparent conductive patterns and the plurality of second transparent conductive patterns each contain the conductive fibers and a binder. A touch panel having the conductive sheet according to any one of claims 1 to 7. 9. The method of claim 8,
And a polarizing plate disposed on one side of the transparent substrate. A liquid crystal display,
A touch panel according to claim 8 or 9 arranged on one side of the liquid crystal display,
And a polarizing plate disposed on the other side of the liquid crystal display. An organic EL element,
A circular polarizer,
9. An organic EL display comprising the touch panel according to claim 8 or 9 arranged between the circularly polarizing plate and the organic EL element.

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