CN105094408A - Touch panel - Google Patents

Abstract

The invention provides a touch panel, which comprises a plurality of first conductive patterns and a plurality of second conductive patterns. Each of the first conductive patterns includes a plurality of first mesh units connected to each other. The second conductive pattern and the first conductive pattern are electrically insulated from each other and intersect each other. Each of the second conductive patterns includes a plurality of second mesh units connected to each other, wherein a shape of each of the second mesh units is different from a shape of each of the first mesh units.

Description

touch panel

technical field

The present invention relates to a panel, and in particular to a touch panel.

Background technique

With the rapid development and application of information technology, wireless communication and information home appliances, in order to achieve the purpose of portability, light weight and humanized operation, many information products have changed from traditional keyboard or mouse input devices to touch The panel acts as an input device.

Generally speaking, touch panels can be mainly classified into resistive touch panels and capacitive touch panels. Taking a capacitive touch panel as an example, the capacitive touch panel usually includes a plurality of conductive patterns arranged in a staggered manner. Considering the application scope of the touch panel (for example, it is used in conjunction with a display panel), the material of the conductive pattern is usually a transparent conductive material with good light transmittance, such as indium tin oxide. However, indium is a rare metal, its price is relatively expensive, and its material acquisition is easily limited by the place of origin, making it difficult to obtain the material.

Considering the cost of processing, the difficulty of obtaining materials, and the electrical conductivity, in recent years, grid-shaped metals have been gradually developed to replace flake-shaped ITO conductive patterns. However, the existing grid-like metal has a regular arrangement period, and the pixel array of the display panel also has its own arrangement period, so the moiré effect is likely to occur after the two are stacked, which seriously affects the visual effect.

Contents of the invention

The invention provides a touch panel with good visual effect.

A touch panel of the present invention includes a plurality of first conductive patterns and a plurality of second conductive patterns. Each first conductive pattern includes a plurality of first grid units connected to each other. The second conductive pattern and the first conductive pattern intersect each other and are electrically insulated from each other. Each second conductive pattern includes a plurality of second grid units connected to each other, wherein the shape of each second grid unit is different from that of each first grid unit.

In an embodiment of the present invention, the shape of each first grid unit is a non-regular triangle, the shape of each second grid unit is a non-regular N-gon, and N is a positive integer greater than 3.

In an embodiment of the present invention, the above-mentioned at least three interconnected first grid units share a vertex, and the vertex is located in one of the second grid units.

In an embodiment of the present invention, the connecting line segment between two adjacent vertices of the above-mentioned part falls within two adjacent second grid units where the two adjacent vertices are located.

In an embodiment of the present invention, the number of the above-mentioned first grid units sharing a vertex is equal to the number of sides of the second grid unit where the vertices are located.

In an embodiment of the present invention, the above-mentioned first grid unit is divided into N sub-regions by the edge extending from the vertex, and the standard deviation of the area of the N sub-regions is σ, σ Less than or equal to 90%, σ is defined as the following formula:

$\mathrm{<span\; class="notranslate">\; \&sigma;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; N</span>}\stackrel{<span\; class="notranslate">\; -</span>}{\mathrm{<span\; class="notranslate">\; A</span>}}}\sqrt{\underset{\mathrm{<span\; class="notranslate">\; i</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span>\stackrel{<span\; class="notranslate">\; -</span>}{\mathrm{<span\; class="notranslate">\; A</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; ,</span>$

where N is the number of edges of the second grid cell where the vertex is located, is the average of the areas of these subregions.

In an embodiment of the present invention, the above-mentioned σ is between 10% and 65%.

In an embodiment of the present invention, the angle formed by the side extending from the vertex of each of the above-mentioned first grid units and the side of the corresponding second grid unit is 50 degrees to 90 degrees.

In an embodiment of the present invention, each second grid unit has exactly one vertex shared by adjacent first grid units, and the number of second grid units is equal to the number of vertices.

In an embodiment of the present invention, the above-mentioned touch panel further includes a substrate and an insulating layer, wherein the first conductive pattern and the second conductive pattern are located on the same surface of the substrate and are respectively located on opposite sides of the insulating layer.

In an embodiment of the present invention, the above-mentioned touch panel further includes a substrate, a cover and an insulating layer, wherein the first conductive pattern, the second conductive pattern and the insulating layer are located between the substrate and the cover, and the first conductive pattern and the second conductive pattern are respectively located on opposite sides of the insulating layer.

In an embodiment of the present invention, the above-mentioned insulating layer is an inorganic insulating layer, an organic insulating layer, a laminate of an inorganic insulating layer and an organic insulating layer, or an adhesive layer.

In an embodiment of the present invention, the above-mentioned touch panel further includes a substrate and a cover plate, wherein the first conductive pattern and the second conductive pattern are respectively located on opposite sides of the substrate, and the first conductive pattern and the second conductive pattern One of them is located between the base plate and the cover plate.

In an embodiment of the present invention, the above-mentioned touch panel further includes a first substrate, a cover plate, a first adhesive layer, a second adhesive layer and a second substrate, wherein the first conductive pattern is disposed on the second substrate, and The second substrate is bonded to the cover plate through the second adhesive layer, and the second conductive pattern is disposed on the first substrate and bonded to the second substrate through the first adhesive layer.

In an embodiment of the present invention, the above-mentioned line widths of each first grid unit and each second grid unit fall within a range of 0.05 μm to 20 μm, respectively.

A touch panel of the present invention includes a plurality of conductive patterns. Each conductive pattern includes a plurality of first grid units and a plurality of second grid units, and the first grid units are electrically connected to the second grid units, wherein the shape of each first grid unit is a non-regular triangle, The shape of each second grid unit is a non-regular N-gon, and N is a positive integer greater than 3.

In an embodiment of the present invention, the above-mentioned at least three interconnected first grid units share a vertex, and the vertex is located in one of the second grid units.

In an embodiment of the present invention, the connecting line segment between two adjacent vertices of the above-mentioned part falls within two adjacent second grid units where the two adjacent vertices are located.

In an embodiment of the present invention, the number of the above-mentioned first grid units sharing a vertex is equal to the number of sides of the second grid unit where the vertices are located.

In an embodiment of the present invention, the above-mentioned first grid unit is divided into N sub-regions by the edge extending from the vertex, and the standard deviation of the area of the N sub-regions is σ, σ Less than or equal to 90%, σ is defined as the following formula:

$\mathrm{<span\; class="notranslate">\; \&sigma;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; N</span>}\stackrel{<span\; class="notranslate">\; -</span>}{\mathrm{<span\; class="notranslate">\; A</span>}}}\sqrt{\underset{\mathrm{<span\; class="notranslate">\; i</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span>\stackrel{<span\; class="notranslate">\; -</span>}{\mathrm{<span\; class="notranslate">\; A</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; ,</span>$

where N is the number of edges of the second grid cell where the vertex is located, is the average of the areas of these subregions.

In an embodiment of the present invention, the above-mentioned σ is between 10% and 65%.

In an embodiment of the present invention, the angle formed by the side extending from the vertex of each of the above-mentioned first grid units and the side of the corresponding second grid unit is 50 degrees to 90 degrees.

In an embodiment of the present invention, each second grid unit has exactly one vertex shared by adjacent first grid units, and the number of second grid units is equal to the number of vertices.

In an embodiment of the present invention, the above-mentioned plurality of first grid units are connected to each other, and the plurality of second grid units are connected to each other.

In an embodiment of the present invention, the above-mentioned touch panel further includes a substrate, wherein the conductive pattern is disposed on the substrate.

In an embodiment of the present invention, the above-mentioned touch panel further includes a substrate and a cover, wherein the conductive pattern is located between the substrate and the cover.

In an embodiment of the present invention, the above-mentioned line widths of each first grid unit and each second grid unit fall within a range of 0.05 μm to 20 μm, respectively.

In an embodiment of the present invention, the plurality of conductive patterns in the above part are electrically connected together along the first direction to form a plurality of second series arranged in the second direction, and the plurality of conductive patterns in other parts They are electrically connected together along the second direction to form a plurality of first series arranged along the first direction, wherein the first series and the second series are electrically insulated from each other.

In an embodiment of the present invention, the above-mentioned touch panel further includes a plurality of first connection parts and a plurality of second connection parts, wherein each second connection part connects two adjacent conductive patterns in series along the first direction, Each first connecting portion connects two adjacent conductive patterns in series along the second direction, and the first connecting portions and the second connecting portions are electrically insulated from each other and intersect each other.

Based on the above, the above-mentioned embodiments of the present invention utilize a design in which a plurality of first grid units and a plurality of second grid units are superimposed on each other to improve moiré phenomenon and sparkle effect. In this way, the touch panel has a good visual effect.

In order to make the above-mentioned features and advantages of the present invention more comprehensible, the following specific embodiments are described in detail with reference to the accompanying drawings.

Description of drawings

1A is a schematic partial cross-sectional view of a touch display panel using a touch panel according to the first embodiment of the present invention;

FIG. 1B is a schematic partial top view of the first conductive pattern and the second conductive pattern in FIG. 1A;

FIG. 1C is a partial enlarged side view of the first conductive pattern and the second conductive pattern in area A in FIG. 1B;

FIG. 1D is a partial enlarged top view of the first conductive pattern and the second conductive pattern in area A in FIG. 1B;

Figure 1E is a partially enlarged upper view of Figure 1D;

2 to 5B are schematic partial cross-sectional views of five touch panels according to the second to sixth embodiments of the present invention;

6A is a schematic partial cross-sectional view of a touch panel according to a sixth embodiment of the present invention;

FIG. 6B is a schematic partial top view of the conductive pattern in FIG. 6A;

7A is a partial cross-sectional schematic diagram of a touch panel according to a sixth embodiment of the present invention;

FIG. 7B is a schematic partial top view of the conductive pattern in FIG. 7A;

FIG. 8 is a schematic partial cross-sectional view of a touch panel according to a seventh embodiment of the present invention.

Explanation of reference signs:

10: Touch display panel;

100, 200, 300, 400, 500, 500A, 600, 700, 800: touch panel;

110A, 110: substrate;

112, 152: substrate;

114, 154: buried layer;

120: a first conductive pattern;

120A: the first series;

122A, 122B, 132A, 132B: conductive patterns;

124A: the first connection part;

130A: the second series;

130: a second conductive pattern;

134A: the second connecting portion;

140: insulating layer;

140A: insulation pattern;

150, 150A: the second substrate;

A, A1, A2, A3, A4, A5, A6, A7: area;

AD: Adhesive layer;

AD1: the first adhesive layer;

AD2: the second adhesive layer;

AH: next layer;

CG: Cover;

D1: first direction;

D2: second direction;

DP: display panel;

LW1, LW2: line width;

M1: the first grid unit;

M2: the second grid unit;

S1, S2: surface;

SS1, SS2: side;

T: vertex;

X: intersection;

θ: angle.

Detailed ways

FIG. 1A is a schematic partial cross-sectional view of a touch display panel using a touch panel according to a first embodiment of the present invention. FIG. 1B is a schematic partial top view of the first conductive pattern and the second conductive pattern in FIG. 1A . FIG. 1C is a partially enlarged side view of the first conductive pattern and the second conductive pattern in area A in FIG. 1B . FIG. 1D is a partially enlarged top view of the first conductive pattern and the second conductive pattern in area A in FIG. 1B . FIG. 1E is a partially enlarged top view of FIG. 1D . Referring to FIGS. 1A to 1E , the touch panel 100 includes a plurality of first conductive patterns 120 and a plurality of second conductive patterns 130 . The touch panel 100 can form a touch display panel 10 together with the display panel DP. In this embodiment, the touch panel 100 and the display panel DP are bonded together through the adhesive layer AH, for example, but not limited thereto. The touch panel 100 may further include a substrate 110 for carrying the first conductive pattern 120 and the second conductive pattern 130 . The substrate 110 is, for example, a substrate independent from the display panel DP. For example, the substrate 110 is a cover plate (Coverlens). The cover may include a glass cover, a plastic cover or other hard and high mechanical strength material to protect, cover or beautify the corresponding device. For example, the cover plate is physically or chemically strengthened glass, or a composite plastic substrate. The composite plastic substrate is, for example, a composite substrate of propylene carbonate (PC) and polymethylmethacrylate (PMMA), but not limited thereto. In addition, the cover plate can be in a plane shape or a curved shape, or a combination thereof, such as 2.5D glass, but not limited thereto. The cover plate is made of light-transmitting material to avoid blocking the display light beam from the display panel DP. For example, the cover plate may have a light transmittance of more than 85%. In addition, an anti-smudge coating (Anti-Smudge Coating) may also be provided on the side of the cover plate facing the user. Furthermore, at least one side of the cover can be provided with a decoration layer (not shown) to shield the metal wires connected to the flexible circuit board or to shield the pads used to connect with the signal transmission lines.

The first conductive pattern 120 and the second conductive pattern 130 are located on the substrate 110 . In this embodiment, the first conductive pattern 120 and the second conductive pattern 130 are jointly disposed on a surface S1 of the substrate 110 , but are not limited to being in direct contact with the surface S1 . For example, an optical matching layer (not shown) may be further provided between the first conductive pattern 120 and the substrate 110 and between the second conductive pattern 130 and the substrate 110 to reduce the 130 reflectivity. In addition, the surface S2 of the substrate 110 in this embodiment is a touch surface relative to the surface S1. The touch surface is the surface relatively adjacent to the user when the touch is performed. The touch panel 100 may further include an insulating layer 140 to electrically insulate the second conductive pattern 130 and the first conductive pattern 120 from each other. In this embodiment, the second conductive pattern 130 is disposed on the surface S1 of the substrate 110 , the insulating layer 140 is disposed on the second conductive pattern 130 , and the first conductive pattern 120 is disposed on the insulating layer 140 . Wherein, the insulating layer 140 may be an organic insulating layer, an inorganic insulating layer, or a stacked layer of an organic insulating layer and an inorganic insulating layer, wherein the material of the inorganic insulating layer may be silicon oxide or nitrogen oxide, and the material of the organic insulating layer may be photosensitive Resin or polyimide (polyimide).

As shown in FIG. 1B , the shapes of the first conductive patterns 120 and the second conductive patterns 130 of this embodiment are strip-shaped conductive patterns, and viewed from a direction perpendicular to the touch panel 100, the second conductive patterns 130 and the first conductive pattern 120 intersect with each other, but the second conductive pattern 130 and the first conductive pattern 120 are electrically insulated from each other by the insulating layer 140 disposed therebetween. In this embodiment, the second conductive pattern 130 and the first conductive pattern 120 have multiple intersections X, and each intersection X is corresponding to one of the overlapping regions (such as the region A). Moreover, the second conductive pattern 130 and the first conductive pattern 120 overlap each other at least in the area A, that is, one of the second conductive pattern 130 and the first conductive pattern 120 is located between the substrate 110 and the other. In the design of the present invention, the first conductive pattern 120 and the second conductive pattern 130 are mutually capacitive structures. For example, the first conductive pattern 120 may be a driving electrode for receiving a driving signal from a controller (not shown), and the second conductive pattern 130 is a receiving electrode for generating a voltage or charge change The information is sent to the controller to determine whether a touch operation occurs. On the contrary, when the first conductive pattern 120 is a receiving electrode, the second conductive pattern 130 is a driving electrode.

The first conductive patterns 120 are, for example, arranged along a first direction D1 and each extend along a second direction D2 , and the second conductive patterns 130 are for example arranged along the second direction D2 and each extend along the first direction D1 . The first direction D1 and the second direction D2 intersect each other, and are, for example, perpendicular to each other, but not limited thereto.

In another design, since the second conductive patterns 130 of this embodiment are closer to the user than the first conductive patterns 120, the width of each second conductive pattern 130 along the second direction D2 is smaller than that of the first conductive patterns 120. The width of the conductive patterns 120 along the first direction D1 is large, and the interval between adjacent first conductive patterns 120 is preferably more than 2 micrometers. In this embodiment, the first conductive pattern 120 is the driving electrode, and the second conductive pattern 130 is the receiving electrode.

The first conductive pattern 120 and the second conductive pattern 130 are made of metal. Specifically, the material of the first conductive pattern 120 and the second conductive pattern 130 can be selected from copper, silver, aluminum, chromium, titanium, molybdenum, etc. or a stack structure of the above materials, or an alloy of at least two of the above materials. For example, the material of the first conductive pattern 120 and the second conductive pattern 130 may be a stacked structure of molybdenum/aluminum/molybdenum. Alternatively, the material of the first conductive pattern 120 and the second conductive pattern 130 may also be a stacked structure of three materials: indium tin oxide/silver/indium tin oxide. The present invention is not intended to limit the number of stacked layers and materials, as long as they have good electrical conductivity, they all fall within the scope of the present invention.

As shown in FIG. 1C , due to the low light transmittance of metal, in order to improve the light transmittance of the touch panel 100, each first conductive pattern 120 includes a plurality of first grid units M1 connected to each other, and each second The conductive pattern 130 includes a plurality of second mesh units M2 connected to each other. The line widths LW1 and LW2 of the first grid unit M1 and the second grid unit M2 fall within the range of 0.05 microns to 20 microns, for example, and preferably fall within the range invisible to human eyes, such as 0.5 micron to 6 microns to avoid affecting the visual effect of the touch panel 100 . In order to clearly distinguish the first conductive pattern 120 from the second conductive pattern 130, the first conductive pattern 120 in FIG. 1C to FIG. The line width LW2 of the second grid unit M2 is smaller than the line width LW1 of the first grid unit M1 , for example, the line width LW2 may also be equal to the line width LW1 . In the present invention, the first mesh unit M1 and the second mesh unit M2 are preferably made of the aforementioned selected metal or alloy material to achieve better electrical properties, such as lower impedance characteristics.

The shape of each second grid unit M2 is different from the shape of each first grid unit M1. In detail, the shape of each first grid unit M1 in this embodiment is a non-regular triangle, and the shape of each second grid unit M2 is a non-regular N-gon, where N is a positive integer greater than 3. As shown in FIG. 1C , each second conductive pattern 130 may be composed of quadrilateral, pentagonal, hexagonal, heptagonal and octagonal second grid units M2, but the invention is not limited thereto. In another embodiment, the second grid unit M2 of each second conductive pattern 130 may also be composed of only one kind of N-gon, for example, only composed of a plurality of non-regular hexagons. In addition, in other implementation structures, the shape of each first grid unit M1 may also be a non-regular N-gon, and in this case, the shape of each second grid unit M2 is a non-regular triangle.

By making the first conductive pattern 120 and the second conductive pattern 130 respectively have irregular grid units, the moiré phenomenon caused by each having a regular periodic arrangement when the touch panel 100 is integrated with the display panel DP can be avoided.

In addition, viewed from a direction perpendicular to the touch panel 100 in FIG. 1A, as shown in FIG. 1D, at the intersection X of the first conductive pattern 120 and the second conductive pattern 130, several first grid units M1 and When several second grid units M2 are superimposed on each other, at least three first grid units M1 connected together share a vertex T (only areas A1, A2, A3, A4, A5 are shown in FIG. 1D vertex T), each vertex T is located in one of the second grid units M2, and each second grid unit M2 will have a vertex T shared by these first grid units M1, that is, the second network The number of grid cells M2 is equal to the number of vertices T. In this embodiment, in order to equalize the aperture ratio of the polygonal grid units (including the first grid unit M1 and the second grid unit M2) at the intersection X, each second grid unit M2 has exactly A vertex T shared by the first mesh unit M1. In addition, the number of the first grid unit M1 sharing the vertex T is equal to the number of edges of the second grid unit M2 where the vertex T is located. Areas A1 , A2 , A3 , A4 , and A5 in FIG. 1D show situations where the number of first grid units M1 sharing a vertex T is 4, 5, 6, 7, and 8, respectively. The number of the first grid unit M1 in the area A1, area A2, area A3, area A4 and area A5 is 4, 5, 6, 7, 8 respectively, and the side of the second grid unit M2 where the vertex T is located The numbers are also 4, 5, 6, 7, and 8, respectively. In this way, although both the first conductive pattern 120 and the second conductive pattern 130 are composed of irregular grid units (referring to the first grid unit M1 and the second grid unit M2), the adjacent grid units under the vertical projection The aperture ratio of the grid cells can be kept substantially consistent. That is to say, the edges extending from a vertex T shared by multiple first grid units M1 divide the second grid unit M2 corresponding to the vertex T into a plurality of sub-regions with similar areas, if the first grid The unit M1 and the second grid unit M2 are in different layers, and these sub-regions are formed by the sides of the first grid unit M1 and the sides of the second grid unit M2 in a direction perpendicular to the projection angle of the touch panel; If the first grid unit M1 and the second grid unit M2 are in the same layer, these sub-regions are formed by connecting the edges of the first grid unit M1 and the edges of the second grid unit M2. One of the embodiments is shown in Figure 1D and 1E, which is suitable for the above-mentioned situation, wherein the second grid unit M2 of this embodiment is an irregular octagon formed by eight sides SS2, and the eight sides SS2 will be connected with The second grid unit M2 is divided into eight sub-areas Ai with similar areas by intersecting the sides SS1 extending from the vertex T or intersecting the projected viewing angle directions, and the areas of the sub-areas may be different. The size of the area difference of the sub-region is determined by the normalized standard deviation (normalized deviation) σ, which is defined as the following formula:

$\mathrm{<span\; class="notranslate">\; \&sigma;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; N</span>}\stackrel{<span\; class="notranslate">\; -</span>}{\mathrm{<span\; class="notranslate">\; A</span>}}}\sqrt{\underset{\mathrm{<span\; class="notranslate">\; i</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span>\stackrel{<span\; class="notranslate">\; -</span>}{\mathrm{<span\; class="notranslate">\; A</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; ,</span>$

Here N is the number of sides of the second grid unit M2 where the vertex T is located, and is the average of the areas of these subregions, Defined as the area of the second grid cell M2 where the vertex T is located divided by the number N of its edges. For different second grid units M2 (such as different shapes or different areas), the standard deviation σ of the area of the sub-regions will also be different. Here, the standard deviation σ is less than or equal to 90%, but the standard deviation σ is preferably between 10% and 65%. Therefore, under the definition of the above-mentioned standard deviation σ, when the irregular grid units are stacked on top of each other, it is possible to prevent the visual quality of the touch display panel 10 from being affected by the concentration of large-area sub-regions and small-area sub-regions, and to further improve the sand point. Effect, and the impact on other visual effects such as color cast and uneven brightness can also be improved.

Under the above design, the side SS1 connecting each first grid unit M1 to the vertex T corresponds to one side SS2 of the second grid unit M2 where the vertex T is located, and is partially connected to the side between two adjacent vertices T The connecting line segment (such as edge SS1) falls within two adjacent second grid units M2 where two adjacent vertices T are located, so that part of the first grid unit M1 connected to the edge SS1 between two adjacent vertices T will intersect On the side SS2 shared by two adjacent second grid units M2 where two adjacent vertices T are located. In this embodiment, the angle θ formed by the side SS1 extending from the vertex T of each first grid unit M1 and the corresponding side SS2 of the second grid unit M2 is 50 degrees to 90 degrees. The angle θ referred to here includes the angle θ included when the side SS1 connected to the vertex T of the first grid unit M1 intersects with the side SS2 of the corresponding second grid unit M2 (as shown in the area A6 of FIG. 1E ) , and when the side SS1 connecting the first grid unit M1 to the vertex T does not intersect the corresponding side SS2 of the second grid unit M2, the extension line of the side SS2 of the second grid unit M2 and the first grid unit M1 The angle θ formed by the side SS1 connected to the vertex T (as shown in the area A7 of FIG. 1E ).

It should be noted that FIGS. 1A to 1E only schematically illustrate an embodiment of the touch panel of the present invention, but the present invention is not limited to the above. Other embodiments of the touch panel of the present invention will be described below with reference to FIG. 2 to FIG. 5B . 2 to 5B are schematic partial cross-sectional views of five touch panels according to the second to sixth embodiments of the present invention. It should be noted that the proportions of FIGS. 2 to 5B are only for illustration and are not intended to limit the present invention. In practical applications, the maximum line spacing of each first grid unit M1 of each first conductive pattern 120 and the maximum line spacing of each second grid unit M2 of each second conductive pattern 130 may be between 100 microns and 200 microns . Please refer to FIG. 2 , the touch panel 200 is substantially the same as the touch panel 100 in FIG. 1A , and the same components are denoted by the same reference numerals, and the design form, relative arrangement relationship and the resulting relationship of these components will not be repeated here. effect.

The main difference is that the touch panel 200 of this embodiment further includes a cover plate CG and an adhesive layer AD, and the cover plate CG is bonded to the substrate 110 through the adhesive layer AD, wherein the bonded first conductive pattern 120, the second The two conductive patterns 130 and the insulating layer 140 are located between the cover plate CG and the substrate 110 . In this embodiment, the substrate 110 serves as a carrier substrate for the first conductive pattern 120 and the second conductive pattern 130 . The carrying substrate can be a substrate independent of the display panel, or an element substrate integrated in the display panel. The component substrate integrated in the display panel is, for example, a color filter substrate of a liquid crystal display panel or a packaging cover plate of an organic light emitting diode display panel, but not limited thereto. In addition, the carrier substrate may be a glass substrate, a plastic substrate, or a plastic film or the like. The thickness of the plastic film is, for example, 100 microns to 200 microns. Here, the carrier substrate is not the cover plate as shown in FIG. 1A , and the substrate 110 in this embodiment may be a substrate that does not need strengthening. It is worth mentioning that the plastic substrate/film can be a substrate such as propylene carbonate (propylenecarbonate, PC), polymethylmethacrylate (Polymethylmethacrylate, PMMA) or polyimide (polyimide) or the aforementioned composite substrate/film, But not limited to this.

Please refer to FIG. 3, the touch panel 300 is substantially the same as the touch panel 200 in FIG. effect. The main difference is that the first conductive pattern 120 and the second conductive pattern 130 of this embodiment are respectively disposed on the cover plate CG and the substrate 110, and the cover plate CG is bonded to the substrate 110 through the adhesive layer AD, wherein the bonded first conductive pattern A conductive pattern 120 and a second conductive pattern 130 are located between the cover CG and the substrate 110 . In this embodiment, the adhesive layer AD not only has the bonding effect, but also provides an insulating effect. In other words, compared with the touch panels 100 and 200 , the present embodiment can omit the arrangement of the insulating layer 140 in FIG. 2 .

Please refer to FIG. 4, the touch panel 400 is substantially the same as the touch panel 200 in FIG. effect. The main difference is that the first conductive pattern 120 and the second conductive pattern 130 of this embodiment are respectively disposed on opposite surfaces of the substrate 110, and the cover plate CG is bonded to the substrate 110 through the adhesive layer AD, wherein the bonded second conductive pattern A conductive pattern 120 is located between the cover CG and the substrate 110 . That is to say, the substrate 110 of this embodiment provides an insulating effect in addition to the carrying effect. Therefore, compared with the touch panels 100 and 200 , the present embodiment can also omit the arrangement of the insulating layer 140 in FIG. 2 . Moreover, the substrate 110 in this embodiment may be the carrier substrate shown in FIG. 2 , which will not be repeated here.

Please refer to FIG. 5A, the touch panel 500 is substantially the same as the touch panel 100 in FIG. effect. The main difference is that the touch panel 500 of this embodiment further includes a first adhesive layer AD1 , a second adhesive layer AD2 , a cover plate CG and a second substrate 150 . The first conductive pattern 120 and the second conductive pattern 130 are respectively disposed on the substrate 110 and the second substrate 150, and the substrate 110 and the second substrate 150 are bonded through the first adhesive layer AD1, wherein the bonded first conductive pattern 120 and The second conductive pattern 130 is located between the substrate 110 and the second substrate 150 . In addition, the second substrate 150 is bonded to the cover CG through the second adhesive layer AD2, and the bonded second substrate 150 is located between the first conductive pattern 120 and the cover CG. In this embodiment, the substrate 110 and the second substrate 150 serve as the carrying substrates of the second conductive pattern 130 and the first conductive pattern 120 respectively. In order to reduce the overall thickness of the touch panel 500 , the substrate 110 and the second substrate 150 are, for example, plastic films with a thickness between 100 μm and 200 μm, respectively. In addition to the bonding effect, the first adhesive layer AD1 also provides an insulating effect. In other words, compared with the touch panels 100 and 200 , the present embodiment can omit the arrangement of the insulating layer 140 in FIG. 2 .

In yet another embodiment, both the first conductive pattern 120 and the second conductive pattern 130 may face a display panel, that is, the second conductive pattern 130 in FIG. 5A is disposed on the other surface of the substrate 110 . Alternatively, both the first conductive pattern 120 and the second conductive pattern 130 may also face toward the user, that is, the first conductive pattern 120 in FIG. 5A is disposed on the other surface of the second substrate 150 .

Please refer to FIG. 5B , the touch panel 500A is substantially the same as the touch panel 500 in FIG. 5A , and the same components are denoted by the same reference numerals. effect. The main difference is that the first conductive pattern 120 is embedded in the second substrate 150A, and the second conductive pattern 130 is embedded in the substrate 110A. In this embodiment, the substrate 110A includes, for example, a base material 112 and an embedding layer 114 disposed on the base material 112 , and the second conductive pattern 130 is embedded in the embedding layer 114 . On the other hand, the second substrate 150A includes, for example, a base material 152 and an embedding layer 154 disposed on the base material 152 , and the first conductive pattern 120 is embedded in the embedding layer 154 . Since the substrates 112 and 152 have high hardness and are difficult to shape, the embedding layers 114 and 154 with low hardness are configured to have the ability to be easily shaped. For example, the material of the substrates 112 and 152 can be a rigid material, such as glass. On the other hand, the material of the embedding layers 114 and 154 can be a soft material, such as ultraviolet glue, thermosetting glue, polymer or organic polymer material containing polyimide. However, the materials of the substrates 112 and 152 and the embedding layers 114 and 154 are not limited to the above.

In another embodiment, if the buried layers 114 and 154 themselves are adhesive, the first adhesive layer AD1 in FIG. 5B can be omitted, but the first conductive pattern 120 and the second conductive pattern 130 must both face the display panel. To avoid the problem of mutual short circuit, that is, the buried layer 114 and the second conductive pattern 130 of FIG. 5B are arranged on the other surface of the substrate 112; Both may face the user, that is, the embedding layer 154 and the first conductive pattern 120 of FIG. 5B are disposed on the other surface of the substrate 152 . In addition, if the substrates 112 and 152 themselves are made of soft materials, that is to say, the substrates 112 and 152 themselves can form a plurality of depressions as shown in FIG. 5B , the embedding layers 114 and 154 can also be omitted.

In the above embodiment, the first conductive pattern consists of a plurality of first grid units to form a strip-shaped conductive pattern, and the second conductive pattern comprises a plurality of second grid units to form a strip-shaped conductive pattern, but the present invention is not limited thereto . FIG. 6A is a schematic partial cross-sectional view of a touch panel according to a sixth embodiment of the present invention. FIG. 6B is a schematic partial top view of the conductive pattern in FIG. 6A . Please refer to FIG. 6A and FIG. 6B , the touch panel 600 includes a substrate 110 and a plurality of conductive patterns 122A, 132A, and the related content of the substrate 110 can refer to the corresponding description in FIG. 1A , which will not be repeated here.

The main difference between the touch panel 600 of this embodiment and the touch panel 100 of the embodiment shown in FIG. 1A to FIG. a second grid unit M2 connected to each other, and the first grid unit M1 in each conductive pattern 122A, 132A is electrically connected to the second grid unit M2, wherein the first grid unit M1 and the second grid unit The relevant content of M2 can refer to the description of FIG. 1C to FIG. 1E . The difference is that the first grid unit M1 and the second grid unit M2 in FIG. 1C to FIG. 1E belong to different conductive patterns, and the first grid unit M1 and the second grid unit M2 are separated from each other and electrically Insulation. In contrast, the conductive pattern 122A (or the conductive pattern 132A) of this embodiment includes a plurality of first grid units M1 connected to each other and a plurality of second grid units M2 connected to each other, wherein the conductive pattern 122A (or the conductive pattern 132A) The first grid unit M1 and the second grid unit M2 of the conductive pattern 132A) are located on the same layer (for example, both are located on the substrate 110 ) and intersect each other. Specifically, the first grid unit M1 and the second grid unit M2 in FIGS. 1C to 1E are respectively located on opposite sides of the insulating layer 140 (please refer to FIG. 1A ). However, the first grid unit M1 and the second grid unit M2 of the conductive pattern 122A in this embodiment are located on the same layer (for example, both are located on the substrate 110 ) and intersect each other. That is to say, each conductive pattern 122A (or each conductive pattern 132A) is composed of various irregular grid units (including the first grid unit M1 and the second grid unit M2 ). Therefore, in addition to improving the sand point effect of the conductive patterns 122A and 132A, this embodiment can also avoid the moiré phenomenon caused by the regular periodic arrangement when the touch panel 600 is integrated with the display panel.

In this embodiment, the touch panel 600 further includes a plurality of first connecting portions 124A and a plurality of second connecting portions 134A, wherein each first connecting portion 124A connects two adjacent conductive patterns 122A in series along the second direction D2 , to form a plurality of first series 120A arranged along the first direction D1, and each second connecting portion 134A connects two adjacent conductive patterns 132A in series along the first direction D1 to form a plurality of lines along the second direction D2 The second series 130A is arranged, wherein the first series 120A and the second series 130A intersect each other and are electrically insulated from each other. Specifically, the touch panel 600 further includes a plurality of island-shaped insulating patterns 140A located at the intersection X of the first series 120A and the second series 130A, so as to electrically insulate the two, wherein the conductive pattern 122A, the conductive pattern 132A and the first connecting portion 124A are co-located on the substrate 110 , and the second connecting portion 134A straddles the insulating pattern 140A and connects two adjacent conductive patterns 132A in series along the first direction D1 .

In another embodiment, the insulating pattern 140A can also cover the entire surface of the substrate 110, the conductive pattern 122A, and the conductive pattern 132A, wherein the conductive pattern 132A is exposed by forming a through hole in the insulating pattern 140A, and the second connection The portion 134A can also connect two adjacent conductive patterns 132A in series along the first direction D1 through through holes. Alternatively, as shown in FIG. 1A , the first series 120A and the second series 130A may also be respectively located on opposite sides of the entire insulating pattern 140 . It should be noted that the first series 120A and the second series 130A can also be applied to the structures shown in FIGS. 2 to 5 (respectively replacing the positions of the first conductive pattern 120 and the second conductive pattern 130 ).

Moreover, although FIG. 6B shows the first connecting portion 124A and the second connecting portion 134A with a single line segment, the present invention is not intended to limit the specific implementation of the first connecting portion 124A and the second connecting portion 134A. For example, the first connecting portion 124A (or the second connecting portion 134A) may be a single line segment, a plurality of line segments, or may also adopt the form of the conductive pattern 122A (or the conductive pattern 132A), that is, include the first grid unit M1 with the second grid cell M2. The line segment may be a straight line, a curved line or a zigzag line. In addition, the material of the first connecting portion 124A and the second connecting portion 134A can adopt the material of the first mesh unit M1 and the second mesh unit M2 to simplify processing time and cost.

FIG. 7A is a seventh embodiment of the present invention, and FIG. 7A is a partial cross-sectional schematic diagram of a touch panel according to the sixth embodiment of the present invention. FIG. 7B is a schematic partial top view of the conductive pattern in FIG. 7A . Please refer to FIG. 7A and FIG. 7B. The touch panel 700 is substantially the same as the touch panel 600 in FIG. 6A and FIG. . The main difference is that the touch panel 700 has a single-layer touch sensing structure. That is to say, compared with the touch panel 600 , the present embodiment can omit the arrangement of the first connecting portion 124A and the second connecting portion 134A in FIG. 6B . In this embodiment, each conductive pattern 122B (or conductive pattern 132B) may include a first grid unit M1 and a second grid unit M2, that is, adopt the design of the conductive pattern 122A (or conductive pattern 132A) in FIG. 6B , In order to achieve the above-mentioned improvement of sand point effect and moiré phenomenon.

It should be noted that this embodiment is not intended to limit the shapes of the conductive pattern 122B and the conductive pattern 132B or the relative arrangement relationship between the two. Any single-layer touch sensing structure falls within the scope of the present invention. For example, in another embodiment, the shapes of the conductive patterns 122B and the conductive patterns 132B may be triangular respectively, and the conductive patterns 122B and the conductive patterns 132B are arranged alternately along a direction.

FIG. 8 is a schematic partial cross-sectional view of a touch panel according to a seventh embodiment of the present invention. Please refer to FIG. 8 , the touch panel 800 is substantially the same as the touch panel 700 in FIG. 7A , and the same components are denoted by the same reference numerals, which will not be repeated here. The main difference is that the touch panel 800 also includes a cover plate CG and an adhesive layer AD, and the cover plate CG is bonded to the substrate 110 through the adhesive layer AD, wherein the bonded conductive pattern 122B and conductive pattern 132B (shown In FIG. 7B ), it is located between the cover CG and the substrate 110 . In this embodiment, the substrate 110 serves as a carrier substrate for the conductive patterns 122B, 132B. For related descriptions about the carrier substrate, reference may be made to FIG. 2 , which will not be repeated here.

To sum up, the above-mentioned embodiments of the present invention utilize the overlapping design of the plurality of first grid units M1 and the plurality of second grid units M2 to improve the moiré phenomenon and the sand point effect. In this way, the touch panel has a good visual effect.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention, rather than limiting them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present invention. scope.

Claims (29)

1. A touch panel, characterized in that, comprising: a plurality of first conductive patterns, each of which includes a plurality of first mesh units connected to each other; and A plurality of second conductive patterns, the second conductive patterns and the first conductive patterns are electrically insulated from each other and intersect each other, each of the second conductive patterns includes a plurality of second grid units connected to each other, and each of the first conductive patterns The shapes of the second grid units are different from the shapes of the first grid units. 2. The touch panel according to claim 1, wherein the shape of each of the first grid units is a non-regular triangle, and the shape of each of the second grid units is a non-regular N-gon, where N is greater than A positive integer of 3. 3 . The touch panel according to claim 2 , wherein at least three connected first grid units share a vertex, and the vertex is located in one of the second grid units. 4 . The touch panel according to claim 3 , wherein part of the connecting line segment between two adjacent vertices falls within two adjacent second grid units where the two adjacent vertices are located. 5. The touch panel according to claim 3, wherein the number of the first grid units sharing the vertex is equal to the number of sides of the second grid unit where the vertex is located. 6. The touch panel according to claim 5, wherein each of the first grid units is divided into N sub-regions by the side extending from the vertex of the second grid unit where the vertex is located, and the N sub-regions The standard deviation of the area of the region is σ, σ is less than or equal to 90%, σ is defined as the following formula: $\mathrm{<span\; class="notranslate">\; \&sigma;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; N</span>}\stackrel{<span\; class="notranslate">\; -</span>}{\mathrm{<span\; class="notranslate">\; A</span>}}}\sqrt{\underset{\mathrm{<span\; class="notranslate">\; i</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span>\stackrel{<span\; class="notranslate">\; -</span>}{\mathrm{<span\; class="notranslate">\; A</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; ,</span>$ Wherein N is the edge number of the second grid cell where the vertex is located, is the average of the areas of these subregions. 7. The touch panel according to claim 6, wherein σ is between 10% and 65%. 8. The touch panel according to claim 5, wherein the angle formed by the side extending from the vertex of each first grid unit and the corresponding side of the second grid unit is 50 degrees to 90 degrees. Spend. 9. The touch panel according to claim 2, wherein each second grid unit has exactly one vertex shared by adjacent first grid units, and the second grid unit Amount is equal to the number of vertices. 10. The touch panel according to claim 1, further comprising a substrate and an insulating layer, wherein the first conductive patterns and the second conductive patterns are located on the same surface of the substrate, and are respectively located on the Opposite sides of the insulation. 11. The touch panel according to claim 1, further comprising a substrate, a cover plate, and an insulating layer, wherein the first conductive patterns, the second conductive patterns, and the insulating layer are located between the substrate and the insulating layer. Between the cover plates, the first conductive patterns and the second conductive patterns are respectively located on opposite sides of the insulating layer. 12 . The touch panel according to claim 10 or 11 , wherein the insulating layer is an inorganic insulating layer, an organic insulating layer, a laminate of an inorganic insulating layer and an organic insulating layer, or an adhesive layer. 13. The touch panel according to claim 1, further comprising a substrate and a cover, wherein the first conductive patterns and the second conductive patterns are respectively located on opposite sides of the substrate, and the One of the first conductive pattern and the second conductive patterns is located between the substrate and the cover plate. 14. The touch panel according to claim 1, further comprising a first substrate, a cover plate, a first adhesive layer, a second adhesive layer and a second substrate, wherein the first conductive patterns are arranged on the On the second substrate, the second substrate is bonded to the cover plate through the second adhesive layer, and the second conductive patterns are disposed on the first substrate and bonded to the second substrate through the first adhesive layer. 15 . The touch panel according to claim 1 , wherein the line widths of each of the first grid units and each of the second grid units fall within a range of 0.05 μm to 20 μm, respectively. 16. A touch panel, characterized in that it comprises: A plurality of conductive patterns, each of the conductive patterns includes a plurality of first grid units and a plurality of second grid units, and the first grid units are electrically connected to the second grid units, wherein each of the first grid units The shape of the grid unit is a non-regular triangle, and the shape of each second grid unit is a non-regular N-gon, and N is a positive integer greater than 3. 17 . The touch panel according to claim 16 , wherein at least three connected first grid units share a vertex, and the vertex is located in one of the second grid units. 18 . The touch panel according to claim 17 , wherein part of the connecting line segment between two adjacent vertices falls within two adjacent second grid units where the two adjacent vertices are located. 19. The touch panel according to claim 17, wherein the number of the first grid units sharing the vertex is equal to the number of sides of the second grid unit where the vertex is located. 20. The touch panel according to claim 19, wherein each of the first grid units is divided into N sub-regions by the side extending from the vertex of the second grid unit where the vertex is located, and the N sub-regions The standard deviation of the area of the region is σ, σ is less than or equal to 90%, σ is defined as the following formula: $\mathrm{<span\; class="notranslate">\; \&sigma;</span>}<span\; class="notranslate">\; =</span>\frac{\mathrm{<span\; class="notranslate">\; 1</span>}}{\mathrm{<span\; class="notranslate">\; N</span>}\stackrel{<span\; class="notranslate">\; -</span>}{\mathrm{<span\; class="notranslate">\; A</span>}}}\sqrt{\underset{\mathrm{<span\; class="notranslate">\; i</span>}}{\overset{\mathrm{<span\; class="notranslate">\; N</span>}}{\mathrm{<span\; class="notranslate">\; \&Sigma;</span>}}}{<span\; class="notranslate">\; (</span>{\mathrm{<span\; class="notranslate">\; A</span>}}_{\mathrm{<span\; class="notranslate">\; i</span>}}<span\; class="notranslate">\; -</span>\stackrel{<span\; class="notranslate">\; -</span>}{\mathrm{<span\; class="notranslate">\; A</span>}}<span\; class="notranslate">\; )</span>}^{\mathrm{<span\; class="notranslate">\; 2</span>}}}<span\; class="notranslate">\; ,</span>$ Wherein N is the edge number of the second grid cell where the vertex is located, is the average of the areas of these subregions. 21. The touch panel according to claim 20, wherein σ is between 10% and 65%. 22. The touch panel according to claim 17, wherein the angle formed by the side extending from the vertex of each first grid unit and the corresponding side of the second grid unit is 50 degrees to 90 degrees. Spend. 23. The touch panel according to claim 16, wherein each second grid unit has exactly one vertex shared by adjacent first grid units, and the second grid unit Amount is equal to the number of vertices. 24. The touch panel according to claim 16, wherein the first grid units of the conductive patterns are connected to each other, and the second grid units of the conductive patterns are connected to each other. 25. The touch panel according to claim 16, further comprising a substrate, wherein the conductive patterns are disposed on the substrate. 26. The touch panel according to claim 16, further comprising a substrate and a cover, wherein the conductive patterns are located between the substrate and the cover. 27 . The touch panel according to claim 16 , wherein the line widths of each of the first grid units and each of the second grid units fall within a range of 0.05 μm to 20 μm, respectively. 28. The touch panel according to claim 16, wherein some of the plurality of conductive patterns are electrically connected together along the first direction to form a plurality of second series arranged along the second direction, And a plurality of the conductive patterns in other parts are electrically connected together along the second direction to form a plurality of first series arranged along the first direction, wherein the first series and the second series The columns are electrically insulated from each other. 29. The touch panel according to claim 28, further comprising a plurality of first connection parts and a plurality of second connection parts, wherein each of the second connection parts connects two adjacent conductive patterns along the first Each of the first connecting parts connects two adjacent conductive patterns in series along the second direction, and the first connecting parts and the second connecting parts are electrically insulated from each other and intersect each other.