TWI681325B - Touch panel - Google Patents

Abstract

In a touch panel having a structure in which a first layer in which a first sensor electrode in the form of a mesh of fine lines is formed and a second layer in which a second sensor electrode in the form a mesh of fine lines is formed are overlaid on one another with a transparent insulator between them, a first dummy wiring that constitutes a first mesh pattern with the first sensor electrode is formed in the first layer and a second dummy wiring that constitutes a second mesh pattern with the second sensor electrode is formed in the second layer. The first mesh pattern and the second mesh pattern are identical to each other in a pair of tiling periodicity directions and translational periods corresponding thereto, and are aligned with each other and overlaid on each other in such a way that the first mesh pattern and the second mesh pattern are deviated from each other in both of the pair of tiling periodicity directions, respectively by from 1/4 to 3/4, inclusive, of the translational period corresponding to the tiling periodicity direction.

Description

Touch panel

The present invention relates to a touch panel configured by a grid of thin lines for sensor electrodes that detect a touch position.

FIGS. 1 and 2A and 2B are examples of the prior art of such a touch panel, and for the electrostatic capacitance type described in Japanese Patent Application Publication No. 2017-103317 (issued on June 8, 2017) The composition of the touch panel serves as a presenter. This touch panel is configured such that a first conductor layer, an insulating layer, a second conductor layer, and a protective film are sequentially stacked on the transparent substrate 10. In FIG. 1, the part surrounded by the rectangular frame is the sensor region 20 where the sensor electrode is located. In FIG. 1, the detailed illustration of the sensor electrode is omitted.

The sensor electrode is formed by the first sensor electrode and the second sensor electrode, the first sensor electrode is formed by the first conductor layer, and the second sensor electrode is formed by the 2 conductor layers.

The first sensor electrode 30 is, as shown in FIG. 2A, a plurality of island-shaped electrodes 31 arranged in the X direction parallel to the long side 21 of the sensor region 20 through the connecting portion 32 The electrode rows 33 formed by connection are arranged in plural in parallel in the Y direction parallel to the short side 22 of the sensor region 20.

The second sensor electrode 40 is, as shown in FIG. 2B, an electrode row 43 formed by connecting a plurality of island-shaped electrodes 41 arranged in the Y direction by a connecting portion 42 at X The plural are arranged side by side in the direction to constitute it.

The first sensor electrode 30 and the second sensor electrode 40 are formed by a grid of thin lines, respectively, and the electrode rows 33 and 43 cross each other in an insulated state. The connecting portions 32 and 42 are located at positions overlapping each other.

From both ends of each electrode row 33 of the first sensor electrode 30 in the X direction, second lead wires 51 are respectively drawn, and from one end of each electrode row 43 of the second sensor electrode 40 in the Y direction, it is The first lead wires 52 are derived respectively. The first lead-out wiring 52 and the second lead-out wiring 51 which are arranged in plural and are derived from the sensor region 20 are omitted in FIG. 1 except for the positions at both ends of the arrangement.

At the central portion of one of the long sides of the rectangular transparent substrate 10, terminal portions 53 are arranged and arranged, and the first lead-out wiring 52 and the second lead-out wiring 51 extend up to the terminal portion 53 respectively and The terminal 53 is connected. The ground wiring 54 formed at the peripheral portion of the transparent substrate 10 so as to surround the sensor region 20, the first lead wiring 52, and the second lead wiring 51 is also connected to the terminal portion 53.

The first lead-out wiring 52, the second lead-out wiring 51, and the terminal portion 53 are formed by the first conductor layer, and the ground wiring 54 is formed at both the first and second conductor layers.

The first and second conductor layers having the above-mentioned general configuration are used in this example as conductive ink using conductive particles containing silver or the like, and are printed by gravure offset printing.

In addition, in the touch panel, when the electrode pattern or the wiring pattern is printed and formed using conductive ink containing conductive particles such as silver, in order not to visualize the display portion where the touch panel is arranged Recognition is impaired. It is important to set the sensor electrode located in the sensor area to have high light transmission efficiency and difficult to be visually recognized. Therefore, like the above-mentioned touch panel, Sensor electrodes printed using conductive ink are generally made up of a grid of thin lines.

On the other hand, even if the sensor electrode is formed by a grid of thin lines in this way, the visual contrast between the existing part and the non-existing part of the thin line grid cannot be avoided. As a result, this contrast has a certain impact on the visibility of the display.

In this regard, in the above-mentioned touch panel, since the first sensor electrode 30 and the second sensor electrode 40 are such that the positions of the connecting portions 32 and 42 overlap each other and the electrode rows 33 and 43 They are arranged in such a way as to cross each other, that is, the island-shaped electrode 41 of the second conductor layer is formed at a position in the first conductor layer where there is no grid with thin lines, to fill in this position It is configured to be buried so that the contrast that occurs at the first conductor layer and the contrast that occurs at the second conductor layer act in a way that cancels each other out. The contrast is reduced.

However, between the first conductor layer and the second conductor layer, since there is an insulating layer, the visual contrast between the second conductor layer and the first conductor layer with the insulating layer in between, This is not the same. In this regard, in the touch panel of the prior art, the contrast of the sensor area is not completely eliminated.

In view of this situation, the present invention is to provide a touch panel that can completely eliminate the contrast of the sensor area and does not have an effect on the visibility of the display portion from this point of view, and has excellent quality. One thing, for the purpose.

According to the present invention, the touch panel is configured as follows: the first sensor electrode is composed of a grid of thin wires and is formed at the first layer; and the first false wiring is Formed in a region other than the region where the first sensor electrode is formed at the first layer and insulated from the first sensor electrode and composed of a grid of thin wires; and the second sensor The sensor electrode is formed by a grid of thin wires and is formed at the second layer; and the second dummy wiring is formed by the second sensor electrode formed at the second layer The area other than the area is insulated from the second sensor electrode and is composed of a grid of thin wires. The first layer and the second layer are overlapped by a transparent insulator, and the first The sensor electrode and the first dummy wiring described above are arranged with a first gap formed therebetween, and constitute a first grid pattern which is a single continuous periodic grid pattern. Where the thin lines included in the first grid pattern intersect the first gap, the thin lines included in the first grid are cut off, the second sensor electrode and the first 2 The dummy wiring is arranged with a second gap formed between them, and constitutes a second grid pattern that is a single continuous periodic grid pattern, and is included in the second grid Where the thin line in the grid pattern intersects with the second gap, the thin line included in the second grid is cut off, and the first grid pattern and the second grid pattern are both It is assumed that a unit pattern of one type is used as an arrangement element and a lattice pattern is obtained by filling a plane following the arrangement period direction of a pair. The arrangement period direction of the pair is non-parallel to each other. In the direction defined by each of the arrangement period directions, a parallel period corresponding to the arrangement period direction of the unit lattice is generated, and the first grid pattern and the second grid pattern are the pair of The arrangement period direction and the corresponding advance periods corresponding to these are set equal to each other. The first grid pattern and the second grid pattern are aligned and overlapped with each other. The first grid pattern and the foregoing The second grid pattern is configured to include a range of 1/4 cycle or more and 3/4 cycle or less of the advancing cycle corresponding to the arrangement cycle direction in each of the pair of arrangement cycle directions Deviation.

According to the touch panel according to the present invention, in the first layer where the first sensor electrode is formed and the second layer where the second sensor electrode is formed, the thin line does not occur The contrast of the visibility caused by the presence or absence of the grid can completely eliminate the contrast of the sensor area. By this, it is possible to obtain a high-quality touch that will not impair the visibility of the display section. Control panel.

Hereinafter, the embodiments of the present invention will be described.

Figures 3 to 5 show the details of important parts of the structure of one embodiment of the touch panel according to the present invention, and Figure 6A shows the touch display shown in Figures 3 to 5. A section of the panel is used as a presenter.

The touch panel, in this example, has a structure in which a first layer 62 of conductors, an insulating layer 63, a second layer 64 of conductors, and a protective film 65 are sequentially formed on one side of a transparent substrate 61 On the protective film 65, a cover film 66 is provided. The insulating layer 63, the protective film 65, and the cover film 66 are made of a transparent material, and the first layer 62 and the second layer 64 of the conductor are formed by printing with conductive ink containing conductive particles such as silver. In addition, this touch panel is different from the touch panel of the prior art example shown in FIG. 1 in the configuration of the sensor region 20, and the configuration outside the sensor region 20 is basically the same as The configuration shown in Fig. 1 is the same. Figures 3 to 5 show the details of the position corresponding to the upper left part in Figure 1.

FIG. 3 shows the details of the printed wiring of the first layer 62. In the sensor area 20, the first sensor electrode 70 and the first dummy wiring 80 are formed. The first sensor electrode 70 is an electrode row 73 formed by connecting a plurality of island-shaped electrodes 71 arranged in the X direction through a connecting portion 72, and arranged in a plural number in the Y direction, and In the configuration, the first dummy wiring 80 is insulated from the first sensor electrode 70 in a region other than the region where the first sensor electrode 70 is provided in the sensor region 20 Make settings.

The first sensor electrode 70 and the first dummy wiring 80 are both composed of a grid of thin lines, and the first sensor electrode 70 and the first dummy wiring 80 are formed between these The first gap 91 is arranged so as to constitute the first grid pattern 90 which is a single continuous periodic grid pattern. The thin line included in the first grid pattern 90 is cut off at a place crossing the first gap 91. The unit grid of the first grid pattern 90 is, in this example, a diamond with a length of 400 μm on one side, and the line width of the thin lines constituting the grid is set to 7 μm. In addition, the first gap 91 that insulates the first sensor electrode 70 and the first dummy wiring 80 is set to about 20 μm. In FIG. 3, the first gap 91 is relatively enlarged.

On the other hand, FIG. 4 shows the details of the printed wiring of the second layer 64, and the second sensor electrode 100 and the second dummy wiring 110 are formed in the sensor area 20. In the second sensor electrode 100, a plurality of island-shaped electrodes 101 arranged in the Y direction are connected by a connecting portion 102, and a plurality of electrode rows 103 are arranged side by side in the X direction, and In the configuration, the second dummy wiring 110 is insulated from the second sensor electrode 100 in a region other than the region where the second sensor electrode 100 is provided in the sensor region 20 Make settings.

Both the second sensor electrode 100 and the second dummy wiring 110 are formed by a grid of thin lines, and the second sensor electrode 100 and the second dummy wiring 110 are formed between these The second gap 121 is arranged so as to constitute the second grid pattern 120 which is a single continuous periodic grid pattern. The thin line included in the second grid pattern 120 is cut off at a place crossing the second gap 121. The second grid pattern 120, in this example, is set to the same grid pattern as the first grid pattern 90, formed between the thin lines constituting the grid and the long side 21 of the sensor region 20 The angle is also set to the same. In addition, as in FIG. 3, the second gap 121 is relatively enlarged.

FIG. 5 is a diagram showing a state where the printed wiring of the first layer 62 shown in FIG. 3 and the printed wiring of the second layer 64 shown in FIG. 4 are overlapped with the insulating layer 63 therebetween , The first grid pattern 90 of the first layer 62 and the second grid pattern 120 of the second layer 64 intersect each other at a midpoint that bisects the diamond sides of the unit grid at 200 μm each It is overlapped, and by this, a diamond-shaped lattice with a length of 200 μm on one side is formed in a state where it is extremely uniformly formed over the entire area of the sensor region 20 as shown in FIG. 5. In addition, the electrode row 73 of the first sensor electrode 70 and the electrode row 103 of the second sensor electrode 100 are such that the connection portions 72 and 102 cross each other at positions where they overlap each other.

As described above, according to this example, at the sensor region 20 of the first layer 62 where the first sensor electrode 70 is formed, the first grid pattern 90 is in a uniformly existing state. 2 In the sensor region 20 of the second layer 64 where the sensor electrode 100 is formed, the second grid pattern 120 is in a uniformly existing state. Therefore, in both the first layer 62 and the second layer 64, there will be no visual contrast caused by the presence or absence of the grid of thin lines, even if the first layer 62 and the second layer In the state where 64 is overlapped, of course, visual contrast does not occur, and it becomes a person who can completely eliminate the contrast of the sensor region 20. Therefore, there is no visual impact on the display portion, and a touch panel with excellent quality which is excellent in aesthetics can be obtained.

In addition, the first grid pattern 90 and the second grid pattern 120 are overlapped in such a manner that they intersect at the midpoint of the diamond-shaped sides of 200 μm each as described above. 1 The thin lines of the grid pattern 90 and the thin lines constituting the second grid pattern 120 are not close to each other, and therefore, it does not happen that the group of thin lines made close to each other looks like a thick line. Draw a visually recognizable line of relativity.

In the above example, the printed wiring of the first layer 62 and the printed wiring of the second layer 64 are formed by sandwiching the insulating layer 63 on one side of the base 61, but the first layer 62 The printed wiring of the second layer 64 and the printed wiring of the second layer 64 may be formed on one side and the other side of the base 61, respectively. FIG. 6B is a display for this configuration, and the same symbol is attached to the part corresponding to FIG. 6A. In FIG. 6B, 67 represents the protective film. In addition, the base 61 is an insulator.

Here, for the first grid pattern formed on the first layer 62 where the first sensor electrode 70 is provided and the second layer 64 formed on the second sensor electrode 100 being provided The second grid pattern at the location will be described in more detail.

Both the first grid pattern and the second grid pattern are set as a grid pattern obtained by filling a plane in the direction of a pair of alignment cycles with one type of unit grid as the alignment element. The periodic direction is non-parallel to each other. In the direction defined by each of the paired arranging periodic directions, a parallel period corresponding to the arranging periodic direction of the unit lattice is generated, the first grid pattern and the second In the grid pattern, the direction of the paired arrangement period and the parallel periods corresponding to these are equal to each other.

The first grid pattern and the second grid pattern are aligned and overlapped with a specific deviation. In the above example, the unit grids of the first grid pattern and the second grid pattern intersect at the midpoint of the rhombus that is set to a side with a length of 400 μm, each of which is divided by 200 μm. The first grid pattern and the second grid pattern are overlapped, that is, the first grid pattern and the second grid pattern are arranged in a pair of the two in the periodic direction It is aligned and overlapped in such a way that a deviation of 1/2 of the parallel period corresponding to the direction of the arrangement period is provided. By this, the thin lines constituting the first grid pattern and the second grid pattern are separated from each other at the maximum interval, and in the overlapped state, the rhombus with a length of 200 μm on one side is uniformized However, in the overlapping of the first grid pattern and the second grid pattern, it is only necessary to have a parallel period corresponding to the arrangement period direction in each of the pair of arrangement period directions in a pair The alignment may be performed in a manner of deviation within the range of 1/4 cycle to 3/4 cycle, and by this, it is possible to sufficiently avoid the proximity of the thin lines caused by overlap.

The unit grid is set to a rhombus in the above example, but the system is not limited to this, and various shapes can be adopted. For example, the shape of the unit grid may be square or regular hexagon. The relative angle of the arrangement period direction of one pair of these lattice patterns becomes 90° in squares and 60° in regular hexagons. In addition, the advancing period is the interval between the mutually opposing sides that are parallel to each other (in the case of a square, the length is one side).

FIGS. 7A and 7B show the square lattice patterns 131 and 132 respectively, and FIG. 7C shows that the lattice patterns 131 and 132 are provided for each of the paired alignment periods. There is a state of alignment and overlap as a presenter in such a manner that the deviation of 1/2 of the parallel period corresponding to the direction of the arrangement period is aligned.

FIGS. 8A and 8B show the regular hexagonal lattice patterns 141 and 142 respectively, and FIG. 8C shows the lattice patterns 141 and 142 of the hexagonal lattice patterns in the pairing direction. The presenter is provided with a state of being aligned and overlapping with a deviation of 1/2 of the parallel period corresponding to the direction of the arrangement period.

Furthermore, the shape of the unit grid may be a rectangle or a parallelogram, or the interval between two opposing sides surrounded by three sets of opposing sides that are parallel to each other may not be the same hexagon.

Fig. 9 is a display for the state in which the lattice patterns 151 and 152 in which the unit lattice is rectangular are overlapped, and FIG. 10 is for the opposite direction surrounded by three sets of mutually opposite edges that are parallel to each other. One of the intervals between the two sides is a narrow hexagonal unit lattice pattern 161, 162 in which the horizontal direction is superimposed, and it is exhibited.

The general unit cell of various shapes illustrated in FIG. 9 and FIG. 10 can be performed by a square or regular hexagonal unit cell or a lattice pattern formed by the unit cell as follows (1) or (2) graphics conversion operation to get it.

(1) Convert the graphic in any direction in the plane to anisotropic expansion and contraction (2) Convert to "the coordinate value of each point of the graphic in the first oblique coordinate system defined in the plane, substitute into Graphic conversion of any second oblique coordinate system with an angle between coordinate axes different from the first oblique coordinate system"

For example, by the operation of (1), the square becomes a rectangle or a rhombus, a parallelogram, and by the operation of (2), the square becomes a rhombus. In addition, the regular hexagon is formed by the operation of (1) or (2), and the interval between the opposing two sides surrounded by the three opposing sides that are parallel to each other is not the same hexagon.

In addition, in the above description, the unit grid has a shape in which four or six vertices are connected by edges formed by straight lines and surrounds the interior. However, the unit grid can also be set to 4 One or six vertices are connected by a curve or an edge formed by a straight line and a curve, and the interior is surrounded by a shape.

The unit cell of this shape can be obtained by performing the following operation (3) for the unit cell of square or regular hexagon.

(3) Replace the line segments of opposite sides parallel to each other with the same curve or a line formed by the combination of curve and straight line

FIG. 11 is a display for the state in which the lattice patterns 171 and 172 of the unit grid provided with the unit grid for square operation (3) are overlapped, and FIG. 12 is also for the display of As a presenter, the lattice patterns 181 and 182 of the unit lattice where the operation of (3) was performed on the square unit lattice were overlapped. In addition, FIG. 13A shows an example of the shape of the unit grid 190 obtained by performing the operation of (3) on the square unit grid, and FIG. 13B shows the shape of the unit grid aligned with the regular hexagon. The shape example of the unit grid 200 obtained by the above operation (1) is further demonstrated.

Unit grids that can be plane-filled according to the arrangement period direction of a pair of unit grids that are not parallel to each other and the parallel cycles of these mutually opposite parallel cycles, or a unit grid formed by the unit grid The lattice pattern can also be obtained by performing the above operations (1) to (3) in a complex manner.

In addition, as long as the arrangement period direction of the unit grid and the parallel period system coincide with each other in the first grid pattern and the second grid pattern, the shape itself of the unit grid does not necessarily need to coincide with each other. For example, the unit grid of the second grid pattern may be the operator who performed the above (3) for the unit grid of the first grid pattern.

In the above, the first grid pattern formed at the first layer 62 and the second grid pattern formed at the second layer 64 have been described. However, these first grid patterns and The second grid pattern is, as described above, in order to eliminate the contrast of the sensor area 20, and is located at all areas of the sensor area 20, respectively, in the touch panel composed of the layers shown in FIG. 6A In the case of the case, the first sensor electrode 70 and the second dummy wiring 110 overlap each other with the insulating layer 63 interposed therebetween. Similarly, the second sensor electrode 100 and the first dummy wiring 80 become sandwiched with the insulation The layers 63 overlap each other.

Next, for the second sensor electrode 100 formed by the second layer 64 and the first lead wiring 52 formed by the first layer 62 at the frame area around the sensor area 20, this The connection between the two is explained.

FIG. 14 is a display of this connection portion. At the front end of the first lead-out wiring 52, a first connection portion 52a made of a fine mesh of fine lines is formed. On the other hand, an extension 104 is formed at the end of the second sensor electrode 100. The extension portion 104 is, in this example, a large mesh portion 104a that extends the mesh constituting the second sensor electrode 100, and a small portion that is further extended from the large mesh portion 104a The mesh portion 104b is constituted. The small mesh portion 104b is a fine mesh with a thin line. The small mesh portion 104b and the first connection portion 52a of the first lead-out wiring 52 have the same mesh structure with a unit grid as a square By.

At the insulating layer 63, a first through hole 63a is formed, the first connection portion 52a of the first lead-out wiring 52 and the extension portion 104 of the second sensor electrode 100 are located in the first through hole 63a And are connected to each other in contact, whereby the first lead-out wiring 52 is connected to the second sensor electrode 100. In addition, the first connection portion 52a and the small mesh portion 104b having the same mesh structure are provided, in this example, as shown in FIG. 14, to have a 1/2 pitch (1/2 cycle) The deviations are aligned and overlapped.

On the other hand, at the edge of the first dummy wiring 80 (indicated by a broken line in FIG. 14) overlapping the second sensor electrode 100 with the insulating layer 63 interposed therebetween, in this example, The first concave portion 81 in which the mesh of the thin line is damaged is provided. With the first concave portion 81, the edge of the first dummy wiring 80 is separated from the first through hole 63a. By providing such a first concave portion 81, in this example, it is possible to avoid a problem caused by the contact between the first dummy wiring 80 and the second sensor electrode 100.

That is, if the printing error or blooming occurs in the printing of the first layer 62, the insulating layer 63, and the second layer 64, the first dummy wiring 80 exceeds the edge of the insulating layer 63, that is, If it extends beyond the first through hole 63a and makes contact with the extension 104 of the second sensor electrode 100, the static electricity of the second sensor electrode 100 with the first dummy wiring 80 in contact with it will occur The problem of significant changes in capacitance. On the other hand, by providing the first dummy wiring 80 with a first recess 81 whose edge is separated from the first through hole 63a, the amount of the size of the first recess 81 is ensured The gap between the insulation, therefore, even if printing deviation or blooming within this size occurs during printing, the contact conduction between the first dummy wiring 80 and the second sensor electrode 100 can be avoided, so the first 2 The problem that the electrostatic capacitance of the sensor electrode 100 changes. In addition, the dimensions d ₁ and d ₂ of the first recess 81 shown in FIG. 14 are, for example, such that they are 160 μm.

FIG. 15 shows a connection part between the first sensor electrode 70 and the second lead-out wiring 51. At the front end of the second lead-out wiring 51, it is the same as the first connection portion 52a of the first lead-out wiring 52, and is formed with a second connection portion 51a made of a fine mesh of thin wires, and is connected via this second connection The portion 51a, the first sensor electrode 70 and the second lead-out wiring 51 are connected.

The first sensor electrode 70, the second lead-out wiring 51, and the second connection portion 51a are formed by the same first layer 62, so the second connection portion 51a is covered by the insulating layer 63, but For example, when the second connection portion 51a connected to the edge of the first sensor electrode 70 is used as an inspection pad for electrical inspection of the first sensor electrode 70, As shown in FIG. 15, the insulating layer 63 is provided with a second through hole 63b that exposes the second connection portion 51a. In this case, the same problem as the connection portion between the second sensor electrode 100 and the first lead-out wiring 52 described above may occur. Therefore, at the edge of the second dummy wiring 110 (indicated by a broken line in FIG. 15) overlapping the first sensor electrode 70 with the insulating layer 63 interposed therebetween, the second dummy wiring 110 is provided The second concave portion 111 whose edge is separated from the second through hole 63b.

By providing the second concave portion 111 in this way, it is possible to prevent the second dummy wiring 110 from exceeding the second through hole 63b due to printing deviation or blooming and making contact with the second connection portion 51a and causing the first 1. The problem that the electrostatic capacitance of the sensor electrode 70 changes. In addition, the dimensions d ₁ and d ₂ of the second recess 111 shown in FIG. 15 are set to the same values as the first recess 81.

In addition, as described above, when there is a grid where no thin line exists at the edge of the first dummy wiring 80 or the second dummy wiring 110 (in other words, at the edge of the first grid pattern or the second grid pattern) In the case of a concave portion, the concave portion is ideally positioned outside the sensor area, that is, the edge of the sensor area is ideally set inside the concave portion.

10‧‧‧Transparent substrate 20‧‧‧Sensor area 21‧‧‧Long side 22‧‧‧Short side 30‧‧‧ First sensor electrode 31‧‧‧Island electrode 32‧‧‧‧Connector 33 ‧‧‧Electrode row 40‧‧‧Second sensor electrode 41‧‧‧Island electrode 42‧‧‧‧Connecting part 43‧‧‧Electrode row 51‧‧‧Second lead-out wiring 51a‧‧‧Second connecting part 52‧‧‧First lead wiring 52a‧‧‧First connection part 53‧‧‧ Terminal part 54‧‧‧Ground wiring 61‧‧‧Base 62‧‧‧First layer 63‧‧‧Insulation layer 63a‧‧‧‧ First through hole 63b‧‧‧ Second through hole 64‧‧‧Second layer 65‧‧‧‧Protection film 66‧‧‧ Cover film 67‧‧‧Protection film 70‧‧‧First sensor electrode 71‧‧ ‧Island electrode 72‧‧‧Connecting part 73‧‧‧Electrode row 80‧‧‧First dummy wiring 81‧‧‧First concave part 90‧‧‧First grid pattern 91‧‧‧First gap 100‧‧ ‧Second sensor electrode 101‧‧‧Island electrode 102‧‧‧Connecting part 103‧‧‧Electrode row 104‧‧‧Extended part 104a‧‧‧Large grid part 104b‧‧‧Small grid part 110‧ ‧‧Second false wiring 111‧‧‧Second recess 120 120‧‧‧Second grid pattern 121‧‧‧Second gap 131‧‧‧Grid pattern 132‧‧‧Grid pattern 141‧‧‧Grid pattern 142‧‧ ‧Grid pattern 151‧‧‧Grid pattern 152‧‧‧Grid pattern 161‧‧‧Grid pattern 162‧‧‧Grid pattern 171‧‧‧Grid pattern 172‧‧‧Grid pattern 181‧‧‧Grid pattern 182‧‧‧Grid Pattern 190‧‧‧ unit grid 200‧‧‧ unit grid

FIG. 1 is a diagram showing a configuration example of a touch panel. FIG. 2A is a partially enlarged view showing a prior art configuration example of the first conductor layer of the touch panel. FIG. 2B is a partially enlarged view showing a prior art configuration example of the second conductor layer of the touch panel. FIG. 3 is a partially enlarged view showing the grid pattern of the first layer in one embodiment of the touch panel caused by the present invention. FIG. 4 is a partially enlarged view showing the grid pattern of the second layer in one embodiment of the touch panel caused by the present invention. FIG. 5 is a partially enlarged view showing the state in which the grid pattern shown in FIG. 3 and the grid pattern shown in FIG. 4 are overlapped. FIG. 6A is a diagram showing a partial cross section of one embodiment of the touch panel caused by the present invention. FIG. 6B is a diagram showing a partial cross section of another embodiment of the touch panel caused by the present invention. FIG. 7A is a diagram showing a lattice pattern in which the unit lattice is a square. FIG. 7B is a diagram showing the same lattice pattern as FIG. 7A superimposed on the lattice pattern shown in FIG. 7A. FIG. 7C is a diagram showing a state in which the lattice pattern shown in FIG. 7A and the lattice pattern shown in FIG. 7B are overlapped. FIG. 8A is a diagram showing a lattice pattern in which the unit lattice is a regular hexagon. FIG. 8B is a diagram showing the same lattice pattern as FIG. 8A superimposed on the lattice pattern shown in FIG. 8A. FIG. 8C is a diagram showing a state in which the lattice pattern shown in FIG. 8A and the lattice pattern shown in FIG. 8B are overlapped.　　 Fig. 9 is a diagram showing a state where two unit lattices are rectangular and two lattice patterns are overlapped.　　 Fig. 10 is a diagram showing a state where two unit lattice patterns in a hexagonal shape with a long horizontal direction are overlapped.　　 Fig. 11 is a diagram showing a state where two lattice patterns in which four vertices are connected by a straight line and a curve are overlapped for the unit lattice. FIG. 12 is a diagram showing a state where two lattice patterns in which four vertices are connected by straight lines and curves are superimposed on the unit lattice. FIG. 13A is a diagram showing an example of the shape of the unit grid. FIG. 13B is a diagram showing an example of the shape of the unit grid. FIG. 14 is an enlarged view of a portion where the second sensor electrode and the first lead-out wiring are connected in one embodiment of the touch panel according to the present invention. FIG. 15 is an enlarged view of a portion where the first sensor electrode and the second lead-out wiring are connected in one embodiment of the touch panel according to the present invention.

20‧‧‧Sensor area

21‧‧‧Long side

22‧‧‧short side

72‧‧‧Link

90‧‧‧The first grid pattern

102‧‧‧Link

120‧‧‧ 2nd grid pattern

Claims (14)

A touch panel characterized by comprising: a first sensor electrode formed by a grid of thin wires and formed at the first layer; and a first dummy wiring formed at the foregoing At a region other than the region where the aforementioned first sensor electrode is formed, and is insulated from the aforementioned first sensor electrode and composed of a grid of thin wires; and the second sensor electrode, Is formed by a grid of thin lines and is formed at the second layer; and the second dummy wiring is formed at a region other than the region where the second sensor electrode is formed at the second layer And is insulated from the second sensor electrode and composed of a grid of thin wires. The first layer and the second layer are overlapped by a transparent insulator, and the first sensor electrode The first dummy wiring is arranged with a first gap formed between them, and constitutes a first grid pattern that is a single continuous periodic grid pattern, which is included in the foregoing At a place where the thin line in the first grid pattern intersects with the first gap, the thin line included in the first grid pattern is cut off, the second sensor electrode and the second dummy wiring , A second grid pattern is formed in which a second gap is formed between these, and constitutes a single continuous periodic grid pattern, which is included in the aforementioned second grid pattern Where the thin line intersects the aforementioned second gap, is included The thin lines in the second grid pattern are cut off, and the first grid pattern and the second grid pattern are both set to use one type of unit grid as the arrangement element by following a The lattice pattern obtained by aligning the planes in the arrangement period direction is non-parallel to the arrangement period direction of the pair, and the unit is generated in the direction defined by each of the arrangement period directions of the pair The parallel period corresponding to the arrangement period direction of the lattice, the first grid pattern and the second grid pattern set the arrangement period direction of the pair and the parallel period corresponding to these to be Equal, the first grid pattern and the second grid pattern are aligned and overlapped with each other, and the first grid pattern and the second grid pattern are arranged in the arrangement period direction of the pair Each of the two parties has a deviation within a range of 1/4 cycle to 3/4 cycle of the aforementioned parallel cycle corresponding to the arrangement cycle direction. The touch panel described in item 1 of the patent application scope, wherein the first grid pattern and the second grid pattern are aligned and overlapped with each other, the first grid pattern and the second grid The lattice pattern is provided in each of the two pairs in the arrangement cycle direction, and has a deviation of 1/2 cycle of the advancement cycle corresponding to the arrangement cycle direction. The touch panel as described in item 1 of the patent application scope, wherein the unit grid described above is provided with 4 or 6 vertices through edges The shape that connects and encloses the inside. Each of the aforementioned sides is selected from the group consisting of straight lines, curves, and a combination of these. The touch panel as described in item 3 of the patent application scope, wherein the unit grid is diamond-shaped. The touch panel as described in item 3 of the patent application scope, wherein the unit grid is a square. The touch panel as described in item 3 of the patent application scope, wherein the unit grid is a regular hexagon. The touch panel as described in any one of items 1 to 6 of the patent application scope, wherein the first layer and the second layer are sandwiched between one side of the transparent substrate as described above Printed wiring formed by an insulating layer of an insulator. The touch panel as described in any one of claims 1 to 6, wherein the first layer and the second layer are formed on one side of the base body which is the insulator and Printed wiring on the other side. The touch panel as described in item 7 of the patent application scope, in which One side of the transparent substrate is divided into a sensing area and a frame area around the sensing area, the first grid pattern and the second grid pattern are located in the sensing area , The first lead-out wiring with the first connection part is formed at the first layer, the first lead-out wiring is located at the frame area, at the edge of the second sensor electrode, The extended portion is formed with an extended portion, a first through hole is formed at the insulating layer, the extended portion and the first connection portion are positioned in the first through hole and connected to each other, the first recessed portion, It is formed at the edge of the first mesh pattern, and the first mesh pattern is separated from the first through hole by the first recess. The touch panel as described in item 9 of the patent application range, wherein the first concave portion is formed at the first dummy wiring. The touch panel as described in item 7 of the patent application scope, wherein one side of the transparent substrate is divided into a sensing area and a frame area around the sensing area, and the first grid pattern And the second grid pattern, located in the sensing area, a second lead-out wiring provided with a second connection portion, formed at the first layer, and the second lead-out wiring located in the frame area At this point, the edge of the first sensor electrode and the second connection part are mutually For connection, a second through hole is formed at the insulating layer, the second connection portion is exposed through the second through hole, and a second recess is formed at the edge of the second grid pattern The second grid pattern is separated from the second through hole by the second concave portion. The touch panel as described in item 11 of the patent application range, wherein the second concave portion is formed at the second dummy wiring. The touch panel as described in item 9 of the patent application scope, wherein the second lead-out wiring provided with the second connection portion is formed at the first layer, and the second lead-out wiring is located at the frame area , The edge of the first sensor electrode and the second connection portion are connected to each other, the second through hole is formed at the insulating layer, and the second connection portion passes through the second through hole The exposed second concave portion is formed at the edge of the second grid pattern, and the second grid pattern is separated from the second through hole by the second concave portion. The touch panel as described in item 13 of the patent application range, wherein the second concave portion is formed at the second dummy wiring.

Images