JP5941935B2 - Touch panel device and electrode structure thereof - Google Patents

Description

  The present invention relates to a touch panel device and an electrode structure thereof, and more particularly to a metal electrode structure having a light reflection preventing function and a touch panel device including the metal electrode structure.

  In the prior art of panels using metal electrode conductors (metal mesh), there is a possibility that display quality may deteriorate due to light reflection. An anti-glare film must be formed separately.

Conventionally employed anti-glare films increase the thickness of the touch panel and may affect the translucency of the translucent region. At the same time, optical grade plastic substrates themselves can also cause light reflection, which makes it easier for people to feel visual fatigue in their eyes. Therefore, if the light reflection by the optical grade plastic substrate is combined with the light reflection by the metal conductor described above, the interference of the light reflection becomes more intense, and it becomes easier for the human eye to detect the interference phenomenon of the metal conductor. Hereinafter, the phenomenon of deterioration in display quality due to light reflection is referred to as display unevenness.

  FIG. 1 shows a cross-sectional structure of a substrate and an electrode structure applied to a touch display device in the prior art.

The touch panel includes a substrate 10 and electrode structures 101 and 102 on two upper and lower surfaces thereof. When a touch display device is configured, an optical adhesive (optically adhesive) 11 is provided above the touch display device. The anti-glare treatment film 12 for removing the light reflection of the metal material in the panel is adhered by the optical adhesive 11. Next, the upper substrate 14 is attached by the optical adhesive 13. Below this structure, the substrate 10 can be provided on the liquid crystal display module 16 via the optical adhesive 15. Hereinafter, a metal mesh forming the electrode structures 101 and 102 on the surface of the substrate 10 is referred to as a mesh structure, and a portion that is a light transmitting region other than the mesh structure is referred to as a screen.

In the prior art, as a solution for reducing the above-described metal reflection, for example, there is a method of coating a blackened layer on a metal (for example, copper) mesh structure so as to adjust display unevenness between the screen and the mesh structure. is there. However, in this blackened layer, no matter what kind of metal or oxide layer is used, there is a problem that the conductivity of the metal layer is lowered and the resistance to environmental corrosion is deteriorated.

  FIG. 2 shows a cross-sectional view of a laminated structure of a conductive electrode and a substrate in a conventional touch panel.

As shown in FIG. 2, a first electrode 23 is formed above the plastic substrate 21 in the panel. Since such an electrode structure is a metal material, metal reflection occurs. Accordingly, the first blackening layer 25 can be formed on the surface in order to reduce display unevenness that occurs between the metal and the screen. As shown in FIG. 2, when incident light 201 is incident on the first electrode 23, metal reflection is visually captured by the first blackened layer 25 in the original reflected light 202. Next, in the case of the incident light 203, the light incident on the plastic substrate 21 is also reflected by the substrate, and reflected light 204 is generated.

  As shown in FIG. 2, another electrode layer is formed on the other surface of the plastic substrate 21 to have a second electrode 29. Similarly, a second blackened layer 27 is formed on the outer surface of the second electrode 29. As shown in FIG. 2, the light beam incident on the plastic substrate 21 passes through the plastic substrate 21 and then enters the second electrode 29, and the reflected light 205 is visually captured.

As described above, in the conventional technique, a method of using an anti-glare structure to reduce the metal reflection phenomenon, or a method of forming a blackened layer on the electrode structure to reduce display unevenness generated between the metal and the screen. However, none of them can effectively solve the reflection problem, and there are problems such as an increase in the thickness of the panel, a decrease in the metal conductivity of the coated portion, and a low corrosion resistance.

The metal electrode lead used in the prior art causes metal reflection, the display quality of the panel is deteriorated by directly coating the electrode with an antiglare film, or the problem of display unevenness that occurs between the metal and the screen. In view of the problem of reducing conductivity on the contrary by coating the blackening layer to avoid, the present invention effectively eliminates light reflection caused by the metal or substrate. In addition, the thickness of the touch panel can be effectively reduced, the display quality is not affected, high translucency and metal conductivity are provided, and at the same time, extremely good weather resistance is provided. It is another object of the present invention to provide a touch panel device, an electrode structure, and a manufacturing process thereof that are configured to exhibit corrosion resistance even in an environment of a high-temperature salt bath.

  In one embodiment, the electrode structure is mainly formed on the surface of the substrate, the metal conductive layer being the conductive structure of the electrode structure, and subsequently formed on the surface of the metal conductive layer to scatter light rays due to metal reflection or metal Used to reduce light reflection synthesized from both conductive layer and substrate, matte rough formed by etching or processing metal conductive layer or using electrolytic, sputtering, vapor deposition or coating method Formed on the surface of the roughened structure and the matte roughened structure to absorb the light incident on the metal conductive layer so that it has a matte effect and suppresses metal reflection, and the incident light is unified in the same direction. And a blackening layer for preventing reflection.

  The electrode structure described above may further include an adhesive layer for bonding the electrode structure to the substrate and improving the adhesion between the electrode structure and the substrate. The adhesive layer may have a matte roughening structure.

  In another embodiment, the electrode structure mainly includes a metal conductive layer and a blackened layer having a rough surface. In this embodiment, the roughened surface is formed by directly etching or processing the blackened layer. The blackened layer having the rough surface scatters the reflected light formed by reflection from the metal conductive layer through the surface structure so as to reduce the amount of light reflection. Similarly, an adhesive layer that improves adhesiveness may be formed between the electrode structure and the substrate. The adhesive layer may have a matte roughening structure.

  In the embodiment described above, another blackening layer may be further formed on the surface of the blackening layer so as to enhance the corrosion resistance and blackening ability. Another adhesive layer that improves adhesion may be further formed between the adhesive layer and the metal conductive layer. Other adhesive layers may have a matte roughening structure.

In yet another embodiment, the electrode structure mainly includes an adhesive layer, a metal conductive layer, and a first blackening layer. This first blackening layer is subsequently formed on the surface of the metal conductive layer, and is used to absorb light incident on the metal conductive layer so as to suppress metal reflection. Subsequently, a second blackened layer is formed on the surface of the first blackened layer. Next, the surface of the second blackened layer is etched or processed to form a rough surface structure so as to enhance the light-resistant reflection effect and reduce display unevenness with the screen. The electrode structure according to an embodiment of the present invention may have two or more adhesive layers, a blackened layer, and a matte roughened layer, but the present invention is not limited thereto.

  The electrode structure in each of the embodiments described above is combined with a base material and assembled as a touch panel device.

  In yet another embodiment, a matte roughened structure may be formed on the substrate surface as well. Its main purpose is to be able to scatter light rays that enter the substrate so as to effectively avoid causing visually unpleasant light reflections.

In the embodiment in which the matte roughening structure is formed on the base material and the electrode structure as described above, an optical adhesive may be encapsulated when combined with other elements. By filling the gap of the matte roughening structure on the surface of the transparent region of the substrate with the optical adhesive, the haze value (haze, i.e. haze) increased by the matte roughening can be reduced, The color of the blackened layer having the surface can be further blackened, and display unevenness with the screen can be reduced.

  As described above, the electrode structure in the touch panel device according to the present invention is different from the process of reducing the metal reflection by coating the blackened layer above the copper layer in the conventional metal mesh touch panel. By using the configuration, not only can the light reflection problem of the metal and plastic substrate be solved, but also the thickness of the touch panel can be effectively reduced, and the haze value of the translucent area is also affected. There is no effect. In addition, the electrode structure in the touch panel device according to the present invention does not affect the conductivity of the copper conductive layer, has extremely good weather resistance, and exhibits extremely good life characteristics even in a high-temperature salt bath environment. be able to.

It is a sectional structure figure showing a touch display device in a prior art. It is sectional drawing which shows the laminated structure of the conductive electrode and board | substrate of a touchscreen in a prior art. It is a figure which shows the Example of the basic electrode structure which concerns on this invention. It is a figure which shows the Example of the basic electrode structure which concerns on this invention. It is a figure which shows the other Example of the electrode structure which concerns on this invention. It is a figure which shows the Example of the substrate surface structure which concerns on this invention. It is a figure which shows the Example of the substrate surface structure which concerns on this invention. It is a figure which shows the Example of the coupling | bonding of the electrode structure which concerns on this invention, and a board | substrate. It is a figure which shows the Example of the coupling | bonding of the electrode structure which concerns on this invention, and a board | substrate. It is a figure which shows the Example of the touchscreen which concerns on this invention. It is a figure which shows the Example of the electrode structure which concerns on this invention. It is a figure which shows the Example of the electrode structure which concerns on this invention. It is a figure which shows the Example of the electrode structure which concerns on this invention. It is a flowchart which shows the manufacturing process of the electrode structure which concerns on this invention.

  In order that the technology, method, and effect employed to achieve a predetermined object in the present invention can be more fully understood, the present invention will be described in detail below with reference to the drawings. Accordingly, those skilled in the art can more specifically understand the features and characteristics of the present invention. However, the drawings are only used for reference and explanation, and do not limit the present invention.

  In the touch panel device, the electrode structure, and the manufacturing process thereof according to the present invention, a metal or metal-based electrode structure or a conductive wire is adopted for the touch panel. In the electrode structure, in order to remove metal reflection, a corrosion-resistant blackening layer is formed on the metal material by surface treatment. As a result, it is possible to avoid the problem that the thickness of the structure increases in order to prevent light reflection in the prior art, and it is also possible to avoid the problem that the conductivity decreases due to the normal blackening treatment, and the translucency It is possible to provide a touch panel structure having a metal electrode conductor having a light reflection preventing function that does not affect the metal conductivity.

  In application to the touch panel device according to the present invention, the structure of the embodiment mainly includes a transparent substrate and a metal electrode or conductive wire formed on the substrate, and is applied to a general touch panel or a flexible type touch panel. A matte roughening structure is formed on the surface of the conductive metal by a processing method such as etching or by electrolysis, sputtering or vapor deposition of other materials. In addition, a blackening layer may be separately formed so as to reduce the reflected light energy and thus have the functions of optical alignment and structural strengthening.

  In the embodiment of the touch panel device according to the present invention, the matte roughening structure formed on the surface of the conductive metal or the substrate is a thin layer. This layer may have a thickness of 1 nm to 10 μm, preferably 50 nm to 2 μm. The characteristic of the blackening layer formed on the surface of the conductive metal is that chromaticity comprising L (lightness), a (red / green) and b (yellow / blue) in order to achieve the purpose of reducing the reflected light energy. The ranges in the coordinate values are L <50, a <−0.1, and b <−0.1, respectively.

<First embodiment>
FIG. 3 is a diagram showing an embodiment of a basic electrode structure according to the present invention. As shown in FIG. 3, an electrode structure 32 is formed on the substrate 30. The basic structure of the electrode structure 32 includes a metal conductive layer 301 as a conductive medium, a matte roughened layer 302, and a blackened layer 303. See also the description of FIG. 4 for its structural features and fabrication.

  In this embodiment, the electrode structure 32 may be directly formed on the upper surface or the lower surface of the substrate 30. The structure mainly includes a metal conductive layer 301. The metal conductive layer 301 is a main conductive structure in the electrode structure 32, and can be formed on the specific structure by a method such as electrolysis, sputtering, or printing.

  In the method of using a metal as a conductive structure, the metal easily reflects a light beam from the outside, and thus, when applied to a display device, there is a possibility that a visual influence may occur. Therefore, in the present invention, a roughening means is introduced into this electrode structure. There are various types of roughening methods. In this embodiment, the matte roughening layer 302 is formed on the surface of the metal conductive layer 301. There are various types of methods for forming the matte roughened layer 302. For example, the matte roughened layer 302 may be formed by subjecting the metal conductive layer 301 to surface treatment, or a rough structure layer having a surface structure may be directly formed on the metal conductive layer 301. It may be formed separately. With such a surface structure, the reflected light formed by the reflection from the metal conductive layer 301 can be scattered.

In this embodiment, a blackened layer 303 is subsequently formed on the metal conductive layer 301 and the matte roughened layer 302. The blackening layer 303 is provided, for example, above the metal conductive layer 301 in the electrode structure 32. The blackening layer 303 is used to absorb light incident on the electrode structure 32 from the outside, and particularly can reduce display unevenness with the screen, and can also have a protective structure such as a reinforced structure or anticorrosion.

<Second embodiment>
The basic electrode structure of the touch panel according to the present invention is shown in FIG. For the manufacturing process, the flowchart shown in FIG. 12 can also be referred to.

  First, the substrate 40 is prepared (FIG. 12, S121). An electrode structure 42 is formed on the substrate 40 using metal as a main material. In this embodiment, one electrode structure is taken as an example. However, in the case of actual implementation, an electrode structure arranged in a plurality of array formats may be used as necessary. The substrate 40 may be a glass substrate or a plastic substrate applied to a flexible type touch panel. The material of the plastic substrate may be PET (Polyethylene terephthalate), PEI (Polyetherimide, Polyetherimide), PPSU (Polyphenylenesulfone), PI (Polyimide, Polyimide), or a combination thereof.

  The electrode structure 42 includes an adhesive layer 401 that contacts adjacent to the substrate 40. The adhesive layer 401 is first formed on the surface of the substrate 40 (S123 in FIG. 12), and the electrode structure 42 is bonded to the substrate 40 through the adhesive layer 401. This adhesive layer 401 is used to improve the adhesiveness between the electrode structure to be subsequently formed and the substrate 40, and in this embodiment, the adhesiveness can be strengthened through the separately formed adhesive layer. Thereafter, a metal conductive layer 402 is formed on the adhesive layer 401 (S125 in FIG. 12). The metal conductive layer 402 is a main conductive structure in the electrode structure 42 and can be formed on the specific structure by a method such as electrolysis, sputtering or printing. The material of the metal conductive layer 402 may be a conductive metal material such as silver or copper.

In one embodiment, in order to reduce display unevenness with the screen or to avoid the light reflection phenomenon caused by the metal conductive layer 402, the metal conductive layer 402 is coated with a blackened layer 404 by electrolysis, sputtering, vapor deposition, or coating method. It may be formed directly (S129 in FIG. 12). The blackening layer 404 not only reduces display unevenness with the screen and prevents light reflection, but also can have a protective structure such as a reinforced structure or anticorrosion.

  In this embodiment, the matte roughening layer 403 may be formed in advance on the surface of the metal conductive layer 402 before forming the blackening layer 404 on the metal conductive layer 402 (S127 in FIG. 12). The matte roughened layer 403 has a matte roughened structure, and may be a surface structure formed by subjecting the metal conductive layer 402 to surface treatment (roughening) by etching, surface processing, or the like. Alternatively, it may be a rough structure layer having a surface structure separately formed on the metal conductive layer 402 directly by a method such as electrolysis, sputtering or vapor deposition. With such a surface structure, reflected light formed by reflection from the metal conductive layer 402 can be scattered, and at the same time, light reflection synthesized from both the metal conductive layer 402 and the substrate 40 can be reduced.

  A blackened layer 404 may be further formed on the matte roughened layer 403. The blackening layer 404 is subsequently formed on the surface of the matte roughening layer 403, and is formed as a rough blackening layer structure on the matte roughening layer 403 by electrolysis, sputtering, vapor deposition or coating. Therefore, by forming a non-planar continuous structure above the metal conductive layer 402, the light incident on the metal conductive layer 402 can be irregularly reflected or absorbed to suppress metal reflection, and at the same time the probability that an electron tunnel will occur. It is possible to prevent the conductivity from decreasing by increasing. Furthermore, since the blackened layer structure has better bonding strength and hardness than the metal conductor, it also acts as a corrosion-resistant protective layer. Since the blackening layer 404 is provided in the outer layer of the entire electrode structure 42, it has an effect of assisting in defining the appearance of the metal electrode.

  Further, in one embodiment, electrode structure 42 contacts other structures above. For example, the electrode structure 42 is bonded to another structure through an optically adhesive (OCA) to form a touch display device including an upper film body, a substrate, a lower film body, a display module, and the like. The When the optical adhesive and the blackening layer 404, which is the uppermost layer of the electrode structure 42 of this embodiment, are combined, the blackening layer enhances the degree of blackening and contrast by the optical adhesive due to its characteristics. It is possible to reduce the cloudiness interference on the surface. As a result, the user can comfortably view the touch display device.

<Third embodiment>
An electrode structure in another embodiment is shown in FIG. The electrode structure 52 is formed on the substrate 50. The substrate 50 is prepared by a transparent material such as plastic or glass. The electrode structure 52 mainly includes a first adhesive layer 501 that connects between the substrate 50 and the electrode structure 52. The first adhesive layer 501 can improve the bondability between the electrode structure 52 and the substrate 50. Next, another adhesive layer, for example, the second adhesive layer 502 is formed on the surface of the first adhesive layer 501. With the second adhesive layer 502, the adhesion between the subsequently formed metal conductive layer structure, the substrate 50, and the first adhesive layer 501 can be further improved.

  Subsequently, a metal conductive layer 503 is formed on the second adhesive layer 502. The metal conductive layer 503 is a conductive layer in the electrode structure, and the material may be silver, copper, or the like, but is not limited to a specific material in actual implementation. In this embodiment, a matte roughening layer 504 having a surface structure may be formed on the surface of the metal conductive layer 503 by directly etching the metal surface by a processing method, or by electrolysis, A matte roughened layer 504 having a surface structure may be separately formed by sputtering or vapor deposition. The matte roughened layer 504 can scatter incoming light rays by the surface structure so that a light reflection phenomenon in which the light rays coincide with each other does not occur.

The metal material of the metal conductive layer 503 itself described above easily reflects incident light and easily oxidizes, causing a problem that the conductivity is lowered. Therefore, the first blackening layer 505 having corrosion resistance may be formed on the matte roughening layer 504. The first blackened layer 505 is black or dark, and can effectively reduce metal reflection and reduce display unevenness with the screen. Further, since the first blackening layer 505 is made of a metal-based material, the conductivity of the holding electrode structure 52 can be held. Further, since the first blackening layer 505 has corrosion resistance superior to that of the metal conductive layer 503 or other structures, a covering structure may be used as an auxiliary layer that defines the outer shape of the electrode structure.

  In addition to the above-described layer structures, another blackened layer may be formed in the form of a laminated structure on the first blackened layer 505, such as a second blackened layer 506 shown in the drawing. Similarly, the second blackened layer 506 has an anticorrosive ability and has an advantage of maintaining electrical conductivity. Therefore, the black chromaticity can be further improved, and the coarse structure reduces the reflectance (light-resistant reflection resistance). ) Can be strengthened.

  In the above-described structure, a low-reflection or non-reflection electrode structure can be formed through optical matching by a structure such as an adhesive layer, a matte roughened structure, or a blackened layer. Thereby, the human eye is not affected by the reflection of external light, and the display content of the related display device can be comfortably viewed.

The blackening layer formed in the electrode structure described above can prevent metal reflection and reduce display unevenness with the screen. The matte roughening structure can reduce internal and external light reflection. As in the embodiment shown in FIG. 6, a matte roughened structure having surfaces on the upper and lower surfaces of the substrate may be formed in order to suppress light reflection of the entire structure. By applying these to the touch panel, it is possible to increase visual comfort.

<Fourth embodiment>
As shown in FIG. 6A, the matte roughening structure may be formed on a substrate. In the present embodiment, the matte roughening structures 601 and 602 are formed by subjecting the substrate 60 to surface treatment. The manufacturing process is, for example, etching or surface processing. More specifically, the matte roughening structures 601 and 602 are of chemical etching (sulfuric acid, permanganic acid, etc.), mechanical physical cleaning, or plasma cleaning (for example, rolling, ion beam, corona discharge, atmospheric pressure plasma). It can be formed by using. The material of the matte roughening structures 601 and 602 of this embodiment is the same as the material of the substrate.

  When the electrode structure is formed on the surface of the substrate 60, the matte roughened structure formed on the surface of the substrate 60 prevents incident light from being reflected in one direction, thereby reducing light reflection. And the light directly reflected from the surface of the substrate 60 can also be reduced.

  A surface structure for reducing light reflection formed on the substrate 60 'is shown in FIG. 6B. In the present embodiment, a first matte roughened layer 601 'is formed on the upper surface of the substrate 60'. The purpose of the matte roughening structure is to reduce the light reflection that can be formed on the entire surface of the substrate 60 '. The matte roughening layers 601 ′ and 602 ′ of this embodiment may be formed with a matte roughening structure by adding materials by a method such as electrolysis, sputtering, coating, coining, or vapor deposition.

  In the present embodiment, the second matte roughened layer 602 'may be formed also on the lower surface of the substrate 60'. The method for forming the second matte roughened layer 602 'is the same as the method for forming the first matte roughened layer 601' described above. Light reflection caused by light incident on the structure from the outside by a combination of the first matte roughened layer 601 ′ and the second matte roughened layer 602 ′ formed on the upper and lower surfaces of the substrate 60 ′; Light rays that are emitted from the inside (for example, the backlight module) and cause a visual influence can be effectively reduced. The moire interference phenomenon that is likely to occur when the screen backlight passes through the black matrix of the color filter and the metal electrode is also caused by the action of the second matte roughening layer. The moire problem can be reduced by destroying the regular backlight generated by the matrix. By providing a matte roughening structure on the substrate, it is possible to provide novelty and inventive steps such as effectively reducing the thickness of the element and reducing the metal reflection and the moire interference phenomenon.

  FIG. 2 showing the prior art can be referred to for the manner in which the light beam is incident. According to the method in which the incident light beam is reflected by the substrate surface, the second matte roughened layer 602 ′ in the substrate 60 ′ of this embodiment has another electrode structure (see FIG. 6A and 6B (not shown in FIG. 6B) can be connected, so that when the light beam is incident on the electrode structure on the lower surface, the matte roughening structure on the substrate surface can effectively reduce the metal reflection of the electrode structure. it can. Therefore, the light reflection can be effectively reduced by providing the second matte roughened layer 602 'on the lower surface.

  The method of forming the first matte roughened layer 601 ′ and the second matte roughened layer 602 ′ in this embodiment is made of a material such as a UV adhesive organic silicon resin cured layer or an inorganic silicon resin cured layer. It is realized by applying it separately. The material of the matte roughening layer formed by this method is different from the material of the substrate.

  The roughness (Ra, center line average) of the matte roughening structures 601 and 602 in the embodiment shown in FIG. 6A and the first matte roughening layer 601 ′ and the second matte roughening layer 602 ′ of this embodiment. The range of (roughness) is preferably 0.001 μm to 0.2 μm, and the most preferable range of roughness is Ra = 0.02 μm to 0.1 μm.

<Fifth embodiment>
FIG. 7A is a diagram showing an embodiment in which an electrode structure 72 is formed on a substrate 70 having a matte roughening structure on the surface.

  The electrode structure 72 is formed on the surface of the substrate 70 so as to have a laminated structure. The electrode structure 72 mainly includes a first adhesive layer 721 connected to the substrate 70. The surface in contact with the substrate 70 may be formed as a matte roughened structure as shown in FIG. 6, and is a matte roughened layer 701 in this embodiment.

The first adhesive layer 721 may further be formed with another adhesive layer for reinforcing the metal conductive layer 723 formed subsequently, like the second adhesive layer 722 shown in the drawing. The above embodiments can be referred to for a method of forming the metal conductive layer 723. In this embodiment, in order to reduce or avoid light reflection caused by the metal conductive layer 723, another matte roughening layer 724 in the electrode structure 72 is further formed on the metal conductive layer 723, and the corrosion resistance and blackening effect are also formed. A first blackening layer 725 that can have As shown in the second blackening layer 726 in the figure, the first blackening layer 725 has a function of enhancing the corrosion resistance and the blackening effect in order to reduce the display unevenness caused by the screen. A blackened layer may be formed.

The laminated structure of this embodiment has an effect of reducing or avoiding light reflection by the substrate 70 or the metal conductive layer 723 because the matte roughening structure or the blackening structure is formed on the surface facing the outside. , Display unevenness with the screen can be reduced.

<Sixth embodiment>
FIG. 7B shows that the matte roughened structure (724 in FIG. 7A) can be directly processed last in the manufacturing process to form the matte roughened structure on the substrate and the electrode at the same time. In the case of performing the last processing, in this embodiment, the matte roughened structure can be formed by separately applying a material such as a UV adhesive, an organic silicon resin cured layer, or an inorganic silicon resin cured layer. The material of the matte roughening layer formed by this method is different from the material of the electrode and the substrate. As a processing method, the matte roughened structure may be formed by a method such as electrolysis, sputtering, coating, coining, or vapor deposition.

  As shown in FIG. 7B, the matte roughening layer 724 formed on the metal conductive layer 723 as shown in FIG. 7A is not provided in the electrode structure 72 ′ formed on the substrate 70 ′. In the first place, it is not necessary to previously form a matte roughened layer (701 in FIG. 7A) on the substrate 70 ′, and the first blackened layer 725 ′ may be directly formed on the metal conductive layer 723, or the first blackened layer 725 ′ may be further formed thereon. Two blackening layers 726 ′ may be formed, and then the matte roughening structure 727 may be simultaneously formed on the substrate 70 ′ and the electrode structure 72 ′ in the final processing step.

  In each of the embodiments described above, taking FIG. 7A or 7B as an example, the first adhesive layer 721 and / or the second adhesive layer 722 are made of a polymer, an oxide or a metal material, or a combination of these materials. It may be a thing. Specifically, the polymer material contained in the first adhesive layer 721 is useful for improving the adhesion between the first adhesive layer 721 and the substrate 70. The oxide material contained in the first adhesive layer 721 and / or the second adhesive layer 722 has characteristics that impart antireflection, interference resistance, Newton ring resistance, abrasion resistance, and scratch resistance properties to the adhesive layer. . The metal material contained in the first adhesive layer 721 has an effect of improving the adhesion between the first adhesive layer 721 and the second adhesive layer 722.

  In the fabrication material of each layer in the laminated structure, the polymer material includes acrylic, PET, PEI, PPSU, PI, PEDOT, polyaniline, polypyrrole, or a combination of composite materials thereof. The oxide may be an amorphous or polycrystalline oxide thin film or a powder structure. The composition of the oxide may be titanium oxide, tantalum oxide, silicon oxide, aluminum oxide, or a combination of composites thereof. The metal may include copper, silver, aluminum, molybdenum, nickel, chromium, tungsten, titanium, silicon, zinc, tin, iron and other alloys or combinations of composites thereof. Further, two or three kinds of polymers, metals and oxides may be combined, for example, a bond between metal and oxide, a bond between polymer and metal, a combination of polymer and oxide, or A composite material such as a combination of a metal, an oxide, and a polymer may be used. When the composite material is used, the proportion of the polymer is 10% to 90%, the proportion of the oxide is 10% to 90%, and the proportion of the metal is 10% to 90%. The oxide may have a multilayer structure.

  In one embodiment, the titanium oxide may have a thickness of about 900 nm, and the silicon oxide may have a thickness of about 100 nm. The thickness of the first adhesive layer 721 and / or the second adhesive layer 722 is preferably in the range of 0.001 μm to 1 μm. The reflectivity of the first adhesive layer 721 and / or the second adhesive layer 722 should be in the range of 1% to 50%, preferably lower than 30%. Further, the first adhesive layer 721 and / or the second adhesive layer 722 may be roughened by a processing method so as to achieve an effect of removing reflected light. In the method of forming the first adhesive layer 721 and / or the second adhesive layer 722, (1) energy for sputtering the first adhesive layer is increased so that the material of the adhesive layer bites into the substrate. 2) adding a colored polymer such as added polyaniline to the adhesive layer; (3) etching the adhesive layer material into a porous structure;

  The material of the metal conductive layer 723 may be copper, gold, silver, aluminum, tungsten, iron, nickel, chromium, titanium, molybdenum, indium, tin, or a combination of these materials, and the thickness is preferably 0. The range is from 001 μm to 5 μm.

  In order to increase the adhesion and conductivity of the electrode structure 72, if the metal conductive layer 723 is pure metal, the second adhesive layer 722 adjacent to the metal conductive layer 723 includes the pure metal in a content exceeding 50%. The first adhesive layer 721 may have a stepped structure in which pure metal is contained in a content lower than 50%. For example, if the metal conductive layer 723 is pure copper, the first adhesive layer 721 may be a nickel copper chrome iron alloy, the composition of which is nickel: copper: chromium: iron = 60: 30: 10. : 0 or nickel: copper: chromium: iron = 80: 10: 5: 5. The first adhesive layer 721 may be a nickel tungsten alloy, and the composition is nickel: tungsten = 50: 50. Silicon, phosphorus, or the like may be added separately to the first adhesive layer 721. The second adhesive layer 722 may be a copper nickel chrome alloy, and the composition is copper: nickel: chrome = 60: 30: 10. The second adhesive layer 722 may be a copper nickel tungsten alloy, and the composition thereof is copper: nickel: tungsten = 60: 20: 20. Silicon, phosphorus, or the like may be added separately to the second adhesive layer 722.

  The matte roughening layer 724 provided in the electrode structure 72 is a matte roughening structure, and its physical and mechanical roughening (rolling, plasma etching) or chemical etching method is used in a destructive manner. You may make it improve surface roughness. Therefore, the material of the matte roughening layer 724 is the same material as the metal conductive layer 723.

  In the structure of the matte roughened layer (724 in FIG. 7A), the structure may be separately extended, and the matte roughened layer 724 may be enlarged to cover the metal conductive layer 723. The material of the matte roughening layer 724 may be different from that of the metal conductive layer 723. For example, (1) The coating conditions including dry coating such as sputtering and vapor deposition or wet coating such as electroplating and chemical plating are changed so that a rough surface or a porous structure is formed in a discontinuous island shape. Coating the matte roughening layer 724, or (2) coating the material of the matte roughening layer 724 in advance so as to obtain a smooth continuous structure, and physical or mechanical roughening (rolling, plasma etching) or Utilizing a chemical etching method, the surface roughness is improved by a destructive method. The material of the matte roughening layer 724 manufactured using the growth method may be a polymer, an oxide, or a metal, and is the same as the metal conductive layer 723 or the same as the first blackening layer 725. It may be.

  The matte roughened layer 724 can affect the surface roughness of the electrode structure 72 and has a light-reflective property and an ability to enhance the adhesion of the photosensitive or heat-sensitive anticorrosive agent to the surface of the electrode structure 72. Therefore, it is not necessary to add an antiglare treatment film to the touch panel separately. Therefore, not only the cost can be reduced, but also the fine circuit etching is not affected at the same time. The surface roughness range of the matte roughened layer 724 is preferably Ra = 0.001 μm to 0.2 μm, and the most preferable roughness is Ra = 0.02 μm to 0.1 μm, so the optical haze value is Less than 2.

  The material of the first blackening layer 725 and / or the second blackening layer 726 is copper, silver, aluminum, molybdenum, nickel, chromium, tungsten, titanium, silicon, zinc, tin, or iron, or their It may be a combination of materials. The thickness of the first blackened layer 725 and / or the second blackened layer 726 is preferably in the range of 0.001 μm to 1 μm. The reflectivity of the first blackened layer 725 and / or the second blackened layer 726 may be in the range of 1% to 50%, preferably lower than 30%.

  The second blackening layer 726 described above is another blackening layer to be formed, and can be covered with the first blackening layer 725. Thereby, the corrosion resistance and the blackening ability are improved, the environmental adaptability of the whole structure is improved, and the chromaticity and light reflection ability of the whole electrode are adjusted in cooperation with the first blackening layer 725. Can do. The material of the second blackening layer 726 may be an oxide, a polymer, carbon, or a mixture thereof. The oxide may be silicon oxide, titanium oxide, aluminum oxide or a mixture thereof. The polymer may be an acrylic, an alkylbenzimidazole mixture, an alkylbenzimidazole compound, PET or PEDOT, a polyaniline or a colored organic material that is a mixture thereof.

  In the mixture of the second blackening layer 726, the polymer ratio may be 10% to 90%, and the oxide ratio may be 10% to 90%. The thickness of the second blackening layer 726 is preferably in the range of 0.001 μm to 1 μm. The reflectivity of the second blackening layer 726 must be in the range of 1% to 50%, and is preferably less than 30%. Also, the overall reflectivity of the first blackened layer 725 and the second blackened layer 726 should preferably be lower than 30%. For example, when the device according to the present invention is applied to a display, when the backlight of the screen is turned off, the reflectance is lower than 30%, and the red / green axis (a / −a axis) of the chromaticity coordinates is It becomes lower than -2, and the yellow-blue axis (b / -b axis) becomes lower than -4. In particular, in a screen on which a polarizing plate is mounted, the chromaticity is closer to blue-green, and the b value of the screen on which the polarizing plate is mounted is about −7.

Therefore, the first blackening layer 725 simultaneously adjusts the metal color of the fine metal wire itself, and the color of the fine metal circuit itself used together with the first blackening layer 725 (for example, pure copper which is a metal base material). Reflectivity> 50%, L> 90%, a <0.1, b> 2) can be brought close to the color of the black matrix (BM) of the screen, and contrast and display unevenness can be reduced. This is because when the b value is larger than 1 or the reflectance is larger than 50%, the human eye easily catches the yellowish metal reflection. The chromaticity of the material itself of the first blackened layer 725 and the second blackened layer 726 varies depending on the thickness of the material. When the chromaticity of the first blackened layer 725 covered by the second blackened layer 726 is adjusted by the second blackened layer 726, and the chromaticity is made closer to the color of the black matrix of the screen. At the same time, it can have the characteristics of non-uniform display resistance, anti-reflection, anti-moire interference, Newton ring resistance, abrasion resistance, and scratch resistance.

  However, what is described herein is a specific example of forming roughening and reducing reflected light in the electrode structure, and the present invention is not limited to each example described herein.

<Seventh embodiment>
Yet another embodiment is shown in FIG. FIG. 8 is a diagram showing that the substrate and the electrode structure of the present invention are applied in the touch panel in this embodiment.

  In addition to the fact that the matte roughening structure is formed on the surface of the substrate, in this embodiment, the first matte roughening layer 801 and the second matte roughening are also provided on both the upper and lower surfaces of the substrate 80. Like layer 802, a matte roughened structure is formed. The matte roughened structure should be formed by using methods such as chemical etching (sulfuric acid, permanganic acid, etc.), mechanical physical cleaning or plasma cleaning (rolling, ion beam, corona discharge, atmospheric pressure plasma, etc.). Can do.

The first electrode structure 82 formed above the first matte roughened layer 801 on the upper surface of the substrate 80 and the second electrode structure 84 formed below may have the same structure. Good. Regarding the structure, FIG. 7A or FIG. 7B can be referred to. In the first electrode structure 82 and the second electrode structure 84, for example, non-uniform display resistance, anti-reflection, anti-moire interference, anti-Newton ring, anti-wear, such as an adhesive layer, a blackened layer, and a matte roughened structure. And having a scratch-resistant structure. Refer to the description of FIG. 7A or FIG. 7B for the embodiment. A first matte roughened layer 801 that suppresses light reflection from the substrate 80 is formed on the surface facing the outside of the substrate 80. The second matte roughened layer 802 can reduce or avoid metal reflections formed by the second electrode structure 84. Therefore, when looking outside (upward in the figure), the metal reflection is greatly reduced and the visual effect is improved, so that the comfort of viewing by the human eye can be increased, and the thickness of the element can be reduced. This effectively reduces the moire interference phenomenon.

  A touch panel device is formed by the substrate 80, the electrode structure 82, and the electrode structure 84. As shown in FIG. 8, when this device and other elements are combined to combine the touch display panel device, optical adhesives 811 and 812 are used as adhesives. For example, a touch panel device formed by the substrate 80, the electrode structure 82, and the electrode structure 84 is formed of an optical member 811 and an upper optical member such as an optical element related to the transparent substrate 803 shown in the drawing. In addition, the liquid crystal display module 804 (downward in this embodiment) is combined with the optical adhesive 812. When the matte roughening structure is formed on the surface where the electrode structures 82 and 84 in the base material 80 are combined, when the optical adhesives 811 and 812 are sealed when combined with other members, Since the optical adhesives 811 and 812 are filled in the gaps of the roughened structure on the surface, the haze value of the light-transmitting region that has been raised by the roughening can be reduced and the light transmittance of the light-transmitting region can be increased.

  However, after the optical adhesives 811 and 812 are pasted, the roughness of the first matte roughened layer 801 and the second matte roughened layer 802 formed on the surface of the substrate 80 is the optical adhesive 811, By 812, there is a possibility that the degree of fogging when the human eye visually recognizes the light-transmitting region is reduced. Further, since the optical adhesives 811 and 812 are similar in material to the substrate 80 and have a small difference in refractive index, the optical adhesives 811 and 812 are filled in a rough surface in the touch panel device, whereby the light transmittance of the light transmitting region of the substrate 80 is filled. In addition, the color of the anticorrosion blackening layer can be made closer to black or more similar to the chromaticity of the black matrix of the screen. Therefore, the optical adhesives 811 and 812 reduce the white turbidity effect caused by clouding and effectively reduce the matte roughness on the electrodes so as to effectively shield the metal mesh and enhance the comfort of viewing by the human eye. It does not affect the effect of the chemical layer.

  It should be noted that the present invention is a system that can increase the transmittance of the substrate, unlike the case where the substrate is generally coated with a thin film material having a low refractive index (that is, an antireflection film). In the application of the optical adhesive employed in the present invention, when the surface of the substrate (for example, PET) is roughened, it can be filled with the roughened structure of the surface by coating with the optical adhesive, and further increased by the roughening. The haze value can be reduced. For example, since the refractive index of the glass of the optical adhesive and the panel device is lower than that of PET, the transmittance can be increased. In the data of each structure described above, the refractive index of the surface glass is 1.53, the refractive index of the optical adhesive is 1.46 to 1.47, and the refractive index of the optical grade PET is 1.62.

  The embodiment of the electrode structure is not limited to the above-described drawings. Hereinafter, examples of different electrode structures are shown in each drawing. The relationship between the described adhesive layer, metal conductive layer, matte roughening layer, blackening layer material, manufacturing method, and laminated structure is as described above. Since it is as described in the example, detailed description is omitted here.

  In one embodiment shown in FIG. 9, the surface of the substrate 90 has a matte roughening structure that reduces light reflection, for example, a matte roughening layer 901. An electrode structure is formed above the matte roughened layer 901. The main elements of the electrode structure shown in the embodiment can be referred to FIGS. 7A, 7B, and 8 described above. However, the actual implementation is not limited to the structure described above. The metal conductive layer 923 is directly eroded or processed to form a matte roughened structure, and the matte roughened layer is formed, whereby a rough surface is also formed in the subsequently formed structure. For example, a rough surface is formed in each of the first blackened layer 924 and the second blackened layer 925 with the matte roughened structure of the metal conductive layer 923.

  In the electrode structure formed on the matte roughened layer 901 on the surface of the substrate 90 as in the embodiment of the electrode structure shown in FIG. 10, the first blackened layer 924 ′ formed on the metal conductive layer 923 ′ has A blackened layer having a rough surface is formed by roughing by direct etching or processing. That is, the matte roughening structure described above is directly formed by processing the blackened layer. The first blackening layer 924 'is formed on the metal conductive layer 923' by electrolysis, sputtering, vapor deposition, or a coating method. This rough surface is formed by etching or processing the surface of the first blackening layer 924 '. The first blackening layer 924 ′ having a rough surface can scatter light reflection formed by reflection from the metal conductive layer 923 ′ through the surface structure, and thus can reduce the amount of light reflection. .

  Next, another blackening layer, for example, the second blackening layer 925 'shown in FIG. 10 can be further formed on the first blackening layer 924' having a rough surface. Similarly, a rough surface is formed with the surface structure of the first blackening layer 924 '.

  Further, as in the embodiment shown in FIG. 11, a first blackening layer 924 "is similarly formed on the metal conductive layer 923" in the electrode structure. By directly etching or processing the second blackened layer 925 ″, the surface is roughened to form a rough surface. The second blackening layer 925 ″ having the rough surface is formed subsequently on the surface of the first blackening layer 924 ″ and is reflected from the metal conductive layer 923 ″ through the surface structure. The light reflection is scattered and the amount of light reflection is reduced.

  In the step of forming the two blackened layers, the first blackened layer 924 ″ is formed on the metal conductive layer 923 ″ by electrolysis, sputtering, vapor deposition, or a coating method. The second blackening layer 925 ″ is formed on the first blackening layer 924 ″ by electrolysis, sputtering, vapor deposition, or a coating method. That is, both are created by a similar creation method.

  In the embodiment shown in FIG. 11, the description of each embodiment is referred to for the material and composition of each element in the electrode structure. For the combination of the materials of the first blackening layer or the second blackening layer, the thickness, and the required reflectance of this embodiment, refer to the contents described in the above embodiments.

  As described above, the electrode structure in the touch panel device according to the present invention is different from the process of reducing the metal reflection by coating the blackened layer above the copper layer in the conventional metal mesh touch panel. By using the configuration, not only can the light reflection problem of the metal and plastic substrate be solved, but also the thickness of the touch panel can be effectively reduced, and the haze value of the translucent area is also affected. There is no effect. At the same time, it does not affect the conductivity of the copper conductive layer, has extremely good weather resistance, and can exhibit very good life characteristics even in a high-temperature salt bath environment.

  The above are only preferred embodiments of the present invention, and any equivalent changes or modifications made based on the scope of the claims of the present invention are included in the scope of the present invention.

DESCRIPTION OF SYMBOLS 10 Substrate 101, 102 Electrode structure 11, 13, 15 Optical adhesive 12 Anti-glare processing film 14 Upper substrate 16 Liquid crystal display module 21 Plastic substrate 23 1st electrode 25 1st blackening layer 29 2nd electrode 27 2nd Blackened layer 201, 203 Incident light 202, 204, 205 Reflected light 30 Substrate 32 Electrode structure 301 Metal conductive layer 302 Matte roughened layer 303 Blackened layer 40 Substrate 401 Adhesive layer 42 Electrode structure 402 Metal conductive layer 403 Matte Roughening layer 404 Blackening layer 52 Electrode structure 50 Substrate 501 First adhesive layer 502 Second adhesive layer 503 Metal conductive layer 504 Matte roughening layer 505 First blackening layer 506 Second blackening layer 60, 60 'substrate 601' first matte roughened layer 602 'second matte roughened layer 601 602 matte roughened structures 70, 70' substrate 72, 72 'electrode structures 701, 72 Matte roughened layer 721 First adhesive layer 722 Second adhesive layer 723 Metal conductive layers 725, 725 ′ First blackened layer 726, 726 ′ Second blackened layer 727 Matte roughened structure 80 Substrate 801 First matte roughened layer 802 Second matte roughened layer 82 First electrode structure 84 Second electrode structure 811 812 Optical adhesive 803 Transparent substrate 804 Liquid crystal display module 90 Substrate 901 Matte roughened layer 923, 923 ′, 923 ″ metal conductive layers 924, 924 ′, 924 ″ first blackening layer 925, 925 ′, 925 ″ second blackening layer

Claims (19)

In the electrode structure applied to the display device,
A non-planar continuous structure formed above, a metal conductive layer that is a conductive structure of the electrode structure; and
The metal conductive layer is provided above the metal conductive layer, has a horizontal width that is the same as the horizontal width of the metal conductive layer, and removes light reflection caused by the metal conductive layer. A blackening layer for absorbing light incident on the electrode structure, so as to reduce display unevenness with a light-transmitting region which is not installed;
A surface roughness range Ra = 0.001 μm to 0.2 μm, and is formed in the electrode structure so as to be formed on the surface of the metal conductive layer or the surface of the blackening layer, A matte roughening structure having the property of scattering light entering the electrode structure through the surface structure or light reflection reflected by the metal conductive layer and anti-moire interference properties;
An electrode structure comprising: The matting roughened structure is formed on the surface of the metal conductive layer subsequently, the electrode structure according to claim 1 Material before Kitsuya consumption roughening structure, characterized in that it is the same as the metal conductive layer .   When the matte roughened structure is subsequently formed on the surface of the metal conductive layer, the matte roughened structure is formed by forming a matte roughened layer having the surface structure on the metal conductive layer, The electrode structure according to claim 1, wherein a material of the matte roughening structure is different from that of the metal conductive layer. Electrode structure of claim 1 wherein the matting roughened structure is formed on the surface of the blackening layer, the material of the front Kitsuya consumption roughening structure, characterized in that it is identical to the blackening layer.   When the matte roughened structure is formed on the surface of the blackened layer, the matte roughened structure is formed by forming a matte roughened layer having the surface structure on the blackened layer. The electrode structure according to claim 1, wherein a material of the roughening structure is different from that of the blackened layer. Wherein in blackening layer, the electrode structure according to any one of claims 1 to 5, characterized in that the rough surface is formed with the matte roughened structure. The material of the blackening layer is made of copper, silver, aluminum, molybdenum, nickel, chromium, tungsten, titanium, silicon, zinc, tin or iron, or a combination thereof, and the thickness range of the blackening layer is 0.00. The electrode structure according to claim 6 , wherein a range of reflectance of the blackened layer is 1% to 50%.   The electrode structure according to claim 1, wherein the electrode structure is formed on a substrate. 9. The electrode structure according to claim 8 , wherein a matte roughening structure is formed on a surface of the substrate, and a material of the matte roughening structure is the same as that of the substrate. The matting roughening structure is composed is formed matte roughened layer having the surface structure on the substrate, the material of the matting roughened structure according to claim 8, characterized in that different from the substrate Electrode structure. The method further comprises an adhesive layer formed between the metal conductive layer and the substrate, for bonding the electrode structure and the substrate, and improving adhesion between the electrode structure and the substrate. Item 9. The electrode structure according to Item 8 . The adhesive layer is made of a polymer, an oxide or a metal material, or a combination thereof. The thickness range of the adhesive layer is 0.001 μm to 1 μm, and the reflectance range of the adhesive layer is 1% to 50%. The electrode structure according to claim 11 , wherein:   2. The electrode structure according to claim 1, wherein a roughness range of the matte roughened structure is Ra = 0.02 μm to 0.1 μm, and an optical haze value is smaller than 2. 3. A substrate having at least a surface;
One or more electrode structures formed on the surface, wherein a non-planar continuous structure is formed above, a metal conductive layer that is a conductive structure of the electrode structure, and a metal conductive layer provided above the metal conductive layer The light-transmitting portion has a width in the left-right direction that is the same as the width in the left-right direction of the metal conductive layer, removes light reflection caused by the metal conductive layer, and is a portion where the metal conductive layer is not installed A blackening layer for absorbing light incident on the electrode structure and a surface structure with a roughness range of Ra = 0.001 μm to 0.2 μm so as to reduce display unevenness with the region, It is formed in the electrode structure so as to be formed on the surface of the metal conductive layer or the surface of the blackening layer, and is formed by being reflected by the light entering the electrode structure through the surface structure or by the metal conductive layer Gloss to scatter the reflected light One or more electrode structures comprising: a roughening structure;
The panel apparatus characterized by including. The panel device according to claim 14 , wherein a matte roughening structure is formed on a surface of the substrate. 15. The panel device according to claim 14 , wherein an optical adhesive is encapsulated when the combination of the substrate and the one or more electrode structures is combined with other members in the panel device. The optical adhesive has a glossy surface between the substrate and the one or more electrode structures so as to increase the transmissivity of the translucent region by reducing the haze value of the translucent region that has been raised by roughening. 17. The panel device according to claim 16 , wherein the panel device is used to fill a gap with a roughening structure. A substrate having at least a surface;
One or more electrode structures formed on the surface, wherein a non-planar continuous structure is formed above, a metal conductive layer that is a conductive structure of the electrode structure, and a metal conductive layer provided above the metal conductive layer The light-transmitting portion has a width in the left-right direction that is the same as the width in the left-right direction of the metal conductive layer, removes light reflection caused by the metal conductive layer, and is a portion where the metal conductive layer is not installed A blackening layer for absorbing light incident on the electrode structure and a surface structure with a roughness range of Ra = 0.001 μm to 0.2 μm so as to reduce display unevenness with the region, One or more electrode structures and a matte roughening structure formed simultaneously on the surface of the substrate and scattering light reflections formed by reflection of light entering the electrode structure and the substrate through the surface structure; One or more electrode structures comprising ,
The panel apparatus characterized by including. Matting roughened structure of the surface of the substrate with the electrode structure, according to claim 18, characterized in that it is formed by applying a UV adhesive, organic silicon resin cured layer or an inorganic silicone resin cured layer Panel device.

Images