JP2017182669A - Conductive pattern substrate and display with touch position detection function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a conductive pattern substrate that effectively make inconspicuous light and shade unevenness and moire even when the positions of two pattern conductors are displaced.SOLUTION: A touch panel substrate 20 comprises: first pattern conductors 30 including first linear conductors 40 that are arranged in a mesh pattern defining regularly arranged first rhombic opening areas 43; and second pattern conductors 50 including second linear conductors 60 that are arranged in a mesh pattern defining regularly arranged second rhombic opening areas 63. A longer diagonal 44 of two diagonals of the rhombus formed by the first opening area and a longer diagonal 64 of two diagonals of the rhombus formed by the second opening area form an angle of 85° or more and 95° or less.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a conductive pattern substrate and a display device with a touch position detection function.

  2. Description of the Related Art Conventionally, a conductive pattern substrate is known in which electrodes are formed by conductive wires arranged in a mesh shape. Such a board | substrate may be utilized in field | areas, such as a touchscreen sensor, an antenna device, and an electromagnetic wave shield apparatus. For example, when used in a touch panel sensor, a conductive pattern forming an electrode or the like is provided on at least a portion of the conductive pattern substrate facing the display device. By forming the conductor pattern using a metal material having high conductivity, the surface resistivity (unit: Ω / □) can be sufficiently reduced. On the other hand, since a metal material excellent in conductivity is opaque, visible light transmission is ensured by defining a large number of opening regions with a linear conductor arranged in a mesh. Thereby, according to this kind of electroconductive pattern board | substrate, suitable detection sensitivity and transparency in a touch panel sensor are securable.

  However, it has been conventionally known that a conductive pattern substrate having such a net-like pattern causes problems such as moire and shading unevenness. And in order to eliminate such a malfunction, various research has been performed until now (for example, refer to patent documents 1).

  Moire is a phenomenon in which bright and dark streaks become visible, and the regularity (periodicity) of the mesh pattern of the conductive pattern substrate and the pattern rules of other members superimposed on the conductive pattern substrate This is caused by interference with the image quality (for example, the periodicity of the pixel arrangement of the image display mechanism). For this reason, it is generally considered that making the arrangement of the linear conductors constituting the pattern conductor irregular rather than periodic is effective for making moiré invisible.

  On the other hand, shading unevenness is a phenomenon in which the amount of light transmitted through the conductive pattern substrate and the amount of external light reflected from the conductive pattern substrate are non-uniform in the surface, and a brightly observed portion is locally present. The occurrence of such shading unevenness is considered to be caused by local nonuniformity of the arrangement of the linear conductors constituting the pattern conductor. For this reason, it is generally considered that ordering the arrangement of the linear conductors is effective for making the unevenness of density invisible.

Patent No. 5224203

  By the way, this type of conductive pattern substrate includes a single sheet-like base material, and electrodes are provided on each of one surface and the other surface of the base material, for example, two sheet-like base materials. There are cases where a material is provided, an electrode is provided on each of the two substrates, and the two substrates are bonded together. In both cases, from the viewpoint of ensuring a low resistance value and high transmittance, linear conductors formed in the same pattern of the two pattern conductors at different positions in the normal direction of the substrate. It has been studied to arrange the two patterned conductors so as to overlap each other. However, it is difficult to position the pattern conductor on a single substrate with high accuracy and to position the substrate on which the pattern conductors are respectively formed with high accuracy. When the linear conductors formed in the same pattern of the two pattern conductors are arranged slightly shifted from each other, the opaque portions are aggregated undesirably, resulting in noticeable shading (line thickening). May occur. In addition, if the occurrence of shading is periodic, the occurrence of moire when superimposed with other members becomes significant.

  In order to avoid this problem, it is also considered to arrange the two pattern conductors so that the pattern conductors formed with a pattern having a certain degree of regularity are located with a half-pitch shift. It was. According to this method, it is possible to effectively avoid a slight misalignment between the two pattern conductors directly leading to the thickening of the linear conductor. However, depending on the amount of positional deviation between the two pattern conductors, shading unevenness and moire may become conspicuous.

  The present invention has been made in consideration of the above points, and is capable of suppressing the occurrence of shading unevenness even when the two pattern conductors are displaced, and having a regular arrangement. An object of the present invention is to provide a conductive pattern substrate and a display device with a touch position detection function that can effectively make moire inconspicuous when combined with the above member.

The conductive pattern substrate according to the present invention is:
A first pattern conductor having a first linear conductor arranged in a mesh pattern defining a regularly arranged rhomboid first opening region;
A second pattern conductor having second linear conductors arranged in a mesh pattern that defines regularly arranged rhombic second opening regions;
The longer diagonal of the two diagonals of the rhombus formed by the first opening region and the longer diagonal of the two diagonals of the rhombus formed by the second opening region are 85 ° or more and 95 ° or less. It makes an angle.

  In the conductive pattern substrate according to the present invention, the shape of the first opening region and the shape of the second opening region may be different from each other.

  In the conductive pattern substrate according to the present invention, the shape of the first opening region and the shape of the second opening region may be the same.

  The conductive pattern substrate according to the present invention may further include a first base material provided with the first pattern conductor and a second base material provided with the second pattern conductor.

  The conductive pattern substrate according to the present invention may further include a base material on which the first pattern conductor is provided on one side and the second pattern conductor is provided on the other side.

  The display device with a touch position detection function according to the present invention includes any of the above-described conductive pattern substrates according to the present invention as a touch panel substrate.

  According to the present invention, even when the two pattern conductors are misaligned, it is possible to suppress the occurrence of shading unevenness and to effectively moire when combined with other members having a regular arrangement. Can be inconspicuous.

It is a figure for demonstrating one embodiment by this invention, Comprising: It is an exploded view which shows a display apparatus with a touch position detection function. FIG. 2 is a plan view showing a conductive pattern substrate of the display device. FIG. 3 is a diagram illustrating an example of a layer configuration of the conductive pattern substrate. FIG. 4 is a diagram showing another example of the layer configuration of the conductive pattern substrate. FIG. 5 is a plan view showing a first pattern conductor of the conductive pattern substrate. FIG. 6 is a plan view showing a second pattern conductor of the conductive pattern substrate. FIG. 7 is a plan view showing the first pattern conductor and the second pattern conductor in an overlapping manner. FIG. 8 is a plan view showing a typical example of the pixel arrangement of the display mechanism. FIG. 9A is a plan view showing the first pattern conductor and the second pattern conductor in an overlapping manner. FIG. 9B is a plan view showing the first pattern conductor and the second pattern conductor shown in FIG. 9A with their relative positions shifted. FIG. 9C is a plan view showing the first pattern conductor and the second pattern conductor shown in FIG. 9A with their relative positions shifted. FIG. 10A is a plan view showing the first pattern conductor and the second pattern conductor in an overlapping manner. FIG. 10B is a plan view showing the first pattern conductor and the second pattern conductor shown in FIG. 10A with their relative positions shifted. FIG. 10C is a plan view showing the first pattern conductor and the second pattern conductor shown in FIG. 10A with their relative positions shifted. FIG. 11A is a plan view showing the first pattern conductor and the second pattern conductor in an overlapping manner. FIG. 11B is a plan view showing the first pattern conductor and the second pattern conductor shown in FIG. FIG. 11C is a plan view showing the first pattern conductor and the second pattern conductor shown in FIG. FIG. 12 is a plan view showing a modification of the electrodes of the touch panel substrate.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the drawings attached to the present specification, for the sake of illustration and ease of understanding, the scale, the vertical / horizontal dimension ratio, and the like are appropriately changed and exaggerated from those of the actual ones.

  In the present specification, the terms “plate (substrate)”, “sheet”, and “film” are not distinguished from each other based only on the difference in names. For example, the “plate” is a concept including a member that can be called a sheet or a film.

  Furthermore, as used in this specification, the shape and geometric conditions and the degree thereof are specified. For example, terms such as “parallel”, “orthogonal”, “identical”, length and angle values, etc. Without being bound by meaning, it should be interpreted including the extent to which similar functions can be expected.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In the embodiment described below, an example will be described in which the conductive pattern substrate functions as a touch panel substrate that detects the approach of an external conductor. In this example, the conductive pattern substrate 20 constitutes a part of the touch panel device 15, and the touch panel device 15 constitutes the display device 10 with a touch position detection function together with the image display mechanism 12 that displays an image.

  FIGS. 1-7 is a figure for demonstrating one Embodiment by this invention. 1 is a diagram schematically showing the touch panel device together with an image display mechanism, FIG. 2 is a plan view showing a conductive pattern substrate included in the touch panel device, and FIGS. 3 and 4 are conductive pattern substrates. It is drawing which illustrates 20 layer structures. 5 to 7 are plan views showing pattern conductors of the conductive pattern substrate.

  As shown in FIG. 1, the touch panel device 15 is used in combination with an image display mechanism (for example, a liquid crystal display device) 12 to constitute a display device 10. The image display mechanism 12 includes a display area A1 that can display an image, and a non-display area (also referred to as a frame area) A2 that is disposed outside the display area A1 so as to surround the display area A1. Yes. The touch panel device 15 includes a touch panel substrate 20 and a circuit (not shown) connected to the touch panel substrate 20. The touch panel substrate 20 is disposed at a position facing the display surface 12 a of the image display mechanism 12. As shown in FIGS. 3 and 4, the touch panel substrate 20 is an observation of the touch panel sensors 21, 22, 23 having the pattern conductors 30, 50 used for position detection and the touch panel sensors 21, 22, 23. And a transparent cover 24 disposed on the person side. The transparent cover 24 forms a touch surface on which the touch panel device 15 detects the contact (approach) position of the external conductor. The transparent cover 24 is joined to the touch panel sensors 21, 22, and 23 via a joining layer (not shown).

  In the following description, an example in which the touch panel device 15 is configured as a projected capacitively coupled touch panel device will be described. As shown in FIGS. 2 to 4, the touch panel substrate 20 configured as a projected capacitive coupling system has a first pattern conductor 30 and a second pattern conductor 50 for detecting the approach or contact of an external conductor. doing. In the illustrated example, the first pattern conductor 30 and the second pattern conductor 50 are spaced apart from each other along the normal direction of the touch panel substrate 20.

  The “capacitive coupling” method is also referred to as “capacitance” method or “capacitance coupling” method in the technical field of touch panels. It is treated as a term synonymous with the “capacitive coupling” method. A typical capacitive coupling type touch panel substrate has a light-transmitting conductive pattern, and an external conductor (typically a human finger) approaches the touch panel substrate to externally. A capacitor (capacitance) is formed between the conductor and the conductive pattern of the touch panel substrate. Based on the change in the electrical state accompanying the formation of the capacitor, the position coordinates of the position where the external conductor is approaching on the touch panel substrate are specified. It should be noted that the technical concept described later, which is employed in the touch panel substrate 20 according to the present embodiment, can be applied to either the self-capacitance method or the mutual capacitance method.

  As shown in FIG. 3, the projected capacitively coupled touch panel substrate 20 may include two touch panel sensors 21 and 22 each having pattern conductors 30 and 50. In the example shown in FIG. 3, the first touch panel sensor 21 includes a first base material 26 and a first pattern conductor 30 provided on the first base material 26. Similarly, the second touch panel sensor 22 includes a second base material 27 and a second pattern conductor 50 provided on the second base material 27.

  As another example, the projected capacitively coupled touch panel substrate 20 may have only a single touch panel sensor 23 as shown in FIG. The touch panel sensor 23 is provided on a single base material 28, a first pattern conductor 30 provided on a surface on one side of the base material 28, and a surface on the other side of the base material 28. A second pattern conductor 50.

  The base materials 26, 27, and 28 incorporated in the touch panel substrate 20 function as a support material that supports the pattern conductors 30 and 50, and also function as a dielectric in the touch panel substrate 20. The base materials 26, 27, and 28 are transparent or translucent so that the image of the image display mechanism 12 can be observed through the base materials 26, 27, and 28. The base materials 26, 27, and 28 preferably have a transmittance in the visible light region of 80% or more, and more preferably 84% or more. In addition, the visible light transmittance of the base materials 26, 27, and 28 was measured within a measurement wavelength range of 380 nm to 780 nm using a spectrophotometer (“UV-3100PC” manufactured by Shimadzu Corporation, JISK0115 compliant product). Is specified as an average value of transmittance at each wavelength.

  The base materials 26, 27, and 28 can be made of, for example, glass or a resin film that can function as a dielectric. As the resin film, various resin films used as the base material of the optical member can be suitably used. As an example, an optically isotropic film having no birefringence, typically a film made of a cellulose ester typified by triacetylcellulose, can be used as the base material 26, 27, 28. On the other hand, an optically isotropic film having birefringence can also be used as the base material 26, 27, 28. For example, a polyester film such as polyethylene terephthalate (PET) that is inexpensive and excellent in stability can be used as the base material 26, 27, 28. Polyester films have the advantage that they are less hygroscopic and less likely to be deformed even in high temperature and high humidity environments.

  The touch panel substrate 20 includes a plurality of first electrodes 31 and a plurality of second electrodes 51 supported by the base materials 26, 27, and 28. The 1st electrode 31 and the 2nd electrode 51 are spaced apart and arrange | positioned along the normal line direction to the plate surface. Each first electrode 31 extends in the first electrode direction D1. Each second electrode 51 extends in the second electrode direction D2. In the illustrated example, the first electrode direction D1 and the second electrode direction D2 are orthogonal to each other. Although not shown in FIG. 2, the touch panel substrate 20 includes a plurality of first dummy portions 34 and a plurality of second dummy portions 54. Each of the first dummy portions 34 is adjacent to the second electrode direction D2 perpendicular to the first electrode direction D1 between the two first electrodes 31 adjacent to each other in the arrangement direction of the first electrodes 31 in the illustrated example. The first electrodes 31 are disposed between the two first electrodes 31. Similarly, each second dummy portion 54 is arranged between two second electrodes 51 adjacent to each other in the arrangement direction of the second electrodes 51, in the illustrated example, in a first electrode direction D1 orthogonal to the second electrode direction D2. It is arranged between two adjacent second electrodes 51. In this example, the first pattern conductor 30 forms the first electrode 31 and the first dummy portion 34, and the second pattern conductor 50 forms the second electrode 51 and the second dummy portion 54. Yes. In the illustrated example, the first electrode 31 and the first dummy part 34 formed by the first pattern conductor 30 are more than the second electrode 51 and the second dummy part 54 formed by the second pattern conductor 50. Located on the observer side. In FIG. 2 and FIGS. 7 and 9A to 11C described later, the first pattern conductor 30 (the first electrode 31 and the first dummy portion 34) located on the viewer side is represented by a solid line, and the display mechanism. The second pattern conductor 50 (second electrode 51 and second dummy portion 54) located on the 12 side is represented by a dotted line.

  When the mutual capacitance method is employed, one of the first electrode 31 and the second electrode 51 serves as a drive electrode, and the other serves as a detection electrode to which a signal voltage from the drive electrode is applied. For example, the first electrode 31 provided on the observer side of the touch panel substrate 20 serves as a detection electrode, and the second electrode 51 provided on the display mechanism 12 side of the touch panel substrate 20 serves as a drive electrode.

  As shown in FIG. 2, the first electrode 31 is connected to the plurality of first bulges 32 arranged along the first electrode direction D <b> 1 and the two adjacent first bulges 32. And a first linear portion 33 extending in the electrode direction D1. The width of the first bulging portion 32 along the second electrode direction D2 intersecting the first electrode direction D1 is larger than the width of the first linear portion 33 along the second electrode direction D2. It is a part. The second electrode 51 extends in the second electrode direction D2 so as to connect the plurality of second bulges 52 arranged along the second electrode direction D2 and the two adjacent second bulges 52. 2 linear portions 53. The width of the second bulging portion 52 along the first electrode direction D1 intersecting the second electrode direction D2 is larger than the width of the second linear portion 53 along the first electrode direction D1. It is a part.

  As shown in FIG. 2, the touch panel substrate 20 includes a rectangular active area Aa1 corresponding to a region where a touch position can be detected, and a rectangular frame-shaped inactive area Aa2 positioned around the active area Aa1. It is out. The active area Aa1 and the inactive area Aa2 are respectively partitioned corresponding to the active area A1 and the inactive area A2 of the display mechanism 12. The outline of the rectangular active area Aa1 includes a long side 16a extending in the first electrode direction D1 and a short side 16b extending in the second electrode direction D2 (see FIG. 1). The first electrode direction D1 and the second electrode direction D2 are defined by the long side 16a and the short side 16b that form the outline of the active area Aa1. When the outline of the active area Aa1 is a rectangular shape generally employed in the display mechanism 12, the first electrode direction D1 defined by the long side 16a and the second electrode direction D2 defined by the short side 16b are orthogonal to each other. Will do.

  The first electrode 31, the first dummy portion 34, the second electrode 51, and the second dummy portion 54 described above are disposed in the active area Aa1. On the other hand, in the inactive area Aa2, a plurality of first wiring portions 38 and first terminal portions 39 electrically connected to the first electrodes 31 and a plurality of electrically connected to the second electrodes 51 are provided. A second wiring portion 58 and a second terminal portion 59 are provided. The first wiring portion 38 and the first terminal portion 39 are provided on the first base material 26 similarly to the first pattern conductor 30 in the example shown in FIG. 3, for example, in the example shown in FIG. Similar to the first pattern conductor 30, it is provided on one surface of the substrate 28. Further, the second wiring portion 58 and the second terminal portion 59 are provided on the second base material 27 similarly to the second pattern conductor 50 in the example shown in FIG. 3, for example, as shown in FIG. In the example, like the 2nd pattern conductor 50, it is provided on the other surface of the base material 28. The terminal portions 39 and 59 are disposed in the vicinity of the outer edges of the base materials 26, 27, and 28, and are electrically connected to an external conductor such as an FPC.

  As long as signals can be appropriately transmitted, the specific configurations of the first wiring portion 38 and the first terminal portion 39, the second wiring portion 58 and the second terminal portion 59 are not particularly limited. For example, the first wiring portion 38 and the first terminal portion 39 may be formed at the same time as the first pattern conductor 30 with the same layer configuration as the first pattern conductor 30. Similarly, the second wiring portion 58 and the second terminal portion 59 may be formed simultaneously with the second pattern conductor 50 in the same layer configuration as the second pattern conductor 50.

  Next, the first pattern conductor 30 forming the first electrode 31 and the first dummy portion 34 will be described with reference mainly to FIG. As shown in FIG. 5, the first pattern conductor 30 has first linear conductors 40 arranged in a mesh pattern, in other words, a mesh pattern. As shown in FIG. 5, in the mesh pattern in which the first linear conductors 40 are arranged, first dividing portions 35 are provided corresponding to the outlines of the first electrodes 31. Therefore, the shape of the boundary portion between the first electrode 31 and the first dummy portion 34, that is, the contour of the first electrode 31 is the same as that of the first dividing portion 35 between the first electrode 31 and the first dummy portion 34. Defined by placement. In FIG. 5, the outline of the first electrode 31 in a plan view of the touch panel substrate 20 is indicated by an alternate long and short dash line with a reference sign B <b> 1. By the first dividing portion 35, the plurality of first electrodes 31 and the plurality of first dummy portions 34 provided in the active area Aa1 are insulated from each other. That is, each first electrode 31 and each first dummy section 34 correspond to each of a plurality of sections partitioned by disconnecting the conductive thin wire extending over the entire active area Aa1 by the first dividing section 35. doing.

  In the illustrated example, the mesh pattern in which the first linear conductors 40 constituting the first pattern conductors 30 are arranged defines a large number of first opening regions 43. That is, as shown in FIG. 5, the first linear conductor 40 defining this mesh pattern has a plurality of first connections extending between the two first branch points 42 to define the first opening region 43. Element 41 will be included. In the present embodiment, the first linear conductors 40 constituting the first pattern conductors 30 are arranged in a mesh pattern that defines regularly arranged rhombic first opening regions 43.

  In the example shown in FIG. 5, the first pattern conductors 30 extend in the first direction M1, and the first linear conductors 40 are regularly arranged at equal intervals in the direction intersecting the first direction M1, A first linear conductor 40 extending in a second direction M2 intersecting the first direction M1 and regularly arranged at equal intervals in a direction intersecting the second direction M2. Since the 1st opening area | region 43 makes a rhombus, the 1st direction M1 and the 2nd direction M2 are not orthogonal, but are inclined with respect to each other. In the example shown in FIG. 5, the first opening regions 43 having the same shape are spread so as to face each other in the same direction.

  In FIG. 5, the symbol P1 represents the arrangement pitch of the first linear conductors 40 along the first arrangement direction MA1 orthogonal to the first direction M1. Similarly, the symbol P2 represents the arrangement pitch of the first linear conductors 40 along the second arrangement direction MA2 orthogonal to the second direction M2. When the touch panel substrate 20 is used by being overlapped with another member having another periodic configuration, the first arrangement direction MA1 and the second arrangement direction MA2 indicate the periodicity of the other members. It is preferable to make the moiré inconspicuous. For example, in the display area A1 of the image display mechanism 12 arranged so as to overlap the touch panel substrate 20, pixels P for forming an image are regularly arranged, for example, as shown in FIG. In a general image display mechanism 12, pixels P are arranged at a constant pitch in two directions Dx and Dy parallel to the rectangular long side and short side formed by the display surface 12a. Note that, as in the example illustrated in FIG. 8, each pixel P generally includes a plurality of sub-pixels RP, GP, and BP. In the touch panel substrate 20 used in combination with such a display mechanism 12, the first arrangement direction MA1 and the second arrangement direction MA2 in which the first linear conductors 40 are arranged at the shortest pitch are the arrangement direction of the pixels P. Inclination with respect to Dx and Dy is preferable for invisibility of moire.

  Therefore, in the illustrated example, one arrangement direction Dx of the pixels P is inclined with respect to both the first arrangement direction MA1 and the second arrangement direction MA2, and the other arrangement direction Dy of the pixels P is the first arrangement direction Dy. It is inclined with respect to both the first arrangement direction MA1 and the second arrangement direction MA2. In the illustrated example, one arrangement direction Dx of the pixels P is parallel to the first electrode direction D1 and perpendicular to the second electrode direction D2, and further, the longer one of the longer rhombus formed by the first opening region 43 is formed. One long diagonal 44 extends perpendicular to the first arrangement direction Dx of the pixels, and the shorter first short diagonal 45 of the rhombus formed by the first opening region 43 extends parallel to the first arrangement direction Dx of the pixels. Yes. On the other hand, in the illustrated example, the other arrangement direction Dy of the pixels P is orthogonal to the first electrode direction D1 and parallel to the second electrode direction D2, and further, the first long diagonal 44 of the first opening region 43 is provided. However, the first short diagonal 45 of the first opening region 43 extends perpendicularly to the second arrangement direction Dy of the pixels.

  When the pixels P are arranged in two orthogonal directions, the interior angle θx1 that is an acute angle of the rhombus formed by the first opening region 43 from the viewpoint of effectively making the moire with the display mechanism 12 inconspicuous (see FIG. 5). Is preferably 20 ° or more and 90 ° or less, more preferably 30 ° or more and 85 ° or less, and further preferably 40 ° or more and 80 ° or less.

  The first electrode 31 formed by the first pattern conductor 30 is provided to detect an electromagnetic change or a change in capacitance that occurs when an external conductor contacts or approaches the touch panel substrate 20. is there. Therefore, the first linear conductor 40 forming the first electrode 31 is required to have a conductivity that allows a current caused by electromagnetic change or capacitance change to flow at a detectable level. As a material for constituting the first linear conductor 40, a metal material having excellent conductivity, for example, gold, silver, copper, platinum, aluminum, chromium, molybdenum, nickel, titanium, palladium, indium One or more of these alloys can be used.

  On the other hand, these metal materials have a light shielding property against visible light. In order to make the image displayed by the display mechanism 12 sufficiently visible, the line width of the first linear conductor 40 forming the first pattern conductor 30 can be 10 μm or less, more preferably 7 μm or less. It can be. Moreover, in order to make the image displayed by the display mechanism 12 sufficiently visible, the aperture ratio of the first pattern conductor 30 can be 80% or more, and more preferably 90% or more. . With these designs, the influence of the first linear conductor 40 on the image visually recognized by the observer can be reduced to a negligible level.

  Next, the second pattern conductor 50 that forms the second electrode 51 and the second dummy portion 54 will be described with reference mainly to FIG. As shown in FIG. 6, the second pattern conductor 50 includes the second linear conductors 60 arranged in a mesh pattern, like the first pattern conductor 30. As shown in FIG. 6, the mesh pattern in which the second linear conductors 60 are arranged is provided with second dividing portions 55 corresponding to the outlines of the respective second electrodes 51. By the second dividing portion 55, the plurality of second electrodes 51 and the plurality of second dummy portions 54 provided in the active area Aa1 are insulated from each other. In other words, each second electrode 51 and each second dummy portion 54 correspond to each of a plurality of sections that are partitioned by disconnecting the conductive thin wires that extend over the entire area of the active area Aa1 at the second dividing section 55. doing.

  In the illustrated example, the mesh pattern in which the second pattern conductors 50 are arranged defines a large number of second opening regions 63. That is, the second linear conductor 60 defining the mesh pattern includes a plurality of second connection elements 61 extending between the two second branch points 62 and defining the second opening region 63. . In the present embodiment, the second linear conductors 60 constituting the second pattern conductors 50 are arranged in a mesh pattern that defines regularly arranged rhombic second opening regions 63.

  In the example shown in FIG. 6, the first pattern conductors 30 extend in the third direction M3, and the second linear conductors 60 regularly arranged at equal intervals in the direction intersecting the third direction M3; A second linear conductor 60 extending in a fourth direction M4 intersecting the third direction M3 and regularly arranged in the direction intersecting the fourth direction M4 at regular intervals. Since the 2nd opening area | region 63 makes a rhombus, the 3rd direction M3 and the 4th direction M4 are not orthogonal, but are inclined with respect to each other. In the example shown in FIG. 6, the second opening regions 63 having the same shape are spread so as to face each other in the same direction.

  In FIG. 6, the symbol P3 represents the arrangement pitch of the second linear conductors 60 along the third arrangement direction MA3 orthogonal to the third direction M3. Similarly, the symbol P4 represents the arrangement pitch of the second linear conductors 60 along the fourth arrangement direction MA4 orthogonal to the fourth direction M4. When the touch panel substrate 20 is used by being overlapped with another member having another periodic configuration, the third array direction MA3 and the fourth array direction MA4 indicate the periodicity of the other members. It is preferable to make the moiré inconspicuous. When the touch panel substrate 20 is used in combination with the image display mechanism 12 shown in FIG. 8, the third arrangement direction MA3 and the fourth arrangement direction MA4 in which the second linear conductors 60 are arranged at the shortest pitch are provided. Inclining with respect to the arrangement directions Dx and Dy of the pixels P is preferable for making moiré invisible.

  Therefore, in the illustrated example, one arrangement direction Dx of the pixels P is inclined with respect to both the third arrangement direction MA3 and the fourth arrangement direction MA4, and the other arrangement direction Dy of the pixels P is the first arrangement direction Dy. It is inclined with respect to both the third arrangement direction MA3 and the fourth arrangement direction MA4. In the illustrated example, the longer second long diagonal 64 of the rhombus formed by the second opening region 63 extends in parallel with the first arrangement direction Dx of the pixels, and the shorter one of the shorter rhombus formed by the second opening region 63. Two short diagonal lines 65 extend perpendicular to the first arrangement direction Dx of the pixels. On the other hand, the second long diagonal line 64 of the second opening region 63 extends perpendicularly to the second arrangement direction Dy of the pixels, and the second short diagonal line 65 of the second opening region 63 is parallel to the second arrangement direction Dy of the pixels. It extends to.

  In addition, when the pixels P are arranged in two orthogonal directions, the interior angle θx2 that is an acute angle of the rhombus formed by the second opening region 63 from the viewpoint of effectively making the moire with the display mechanism 12 inconspicuous (see FIG. 6). Is preferably 20 ° or more and 90 ° or less, more preferably 30 ° or more and 85 ° or less, and further preferably 40 ° or more and 80 ° or less.

  The second linear conductor 60 can be manufactured using the same material as the first linear conductor 40 already described. Further, the line width of the second linear conductor 60 can be set similarly to the line width of the first linear conductor 40 already described, and the aperture ratio of the second pattern conductor 50 has already been described. It can be set similarly to the aperture ratio of the second linear conductor 60.

  Incidentally, FIG. 7 is a view showing a state in which the first pattern conductor 30 and the second pattern conductor 50 are overlapped. As can be understood from the comparison between FIG. 5 and FIG. 6 and FIG. 7, in the present embodiment, a rhombus first long diagonal 44 formed by the first opening region 43 defined by the first pattern conductor 30. However, the first pattern conductor 30 and the second pattern conductor 50 are arranged so as to be substantially orthogonal to the rhombic second long diagonal 64 formed by the second opening region 63 defined by the second pattern conductor 50. Overlaid. Here, “substantially orthogonal” means that the rhomboid first long diagonal 44 formed by the first opening region 43 and the rhombic second long diagonal 64 formed by the second opening region 63 form an angle of 85 ° to 95 °. It means an angle. As will be described in detail later, even when the first pattern conductor 30 and the second pattern conductor 50 are unintentionally misaligned when the touch panel substrate 20 is manufactured, at least the first long diagonal 44 and the second long diagonal 64 are at least If it is 85 ° or more and 95 ° or less, shading unevenness can be effectively made inconspicuous, and moire is effective when the touch panel substrate 20 is overlapped with other members including components having periodicity. Can be inconspicuous.

  The touch panel board | substrate 20 shown by FIG. 3 can be manufactured as follows as an example. First, a metal film for forming the first pattern conductor 30 later is laminated on the first base material 26 made of, for example, a resin film. The metal film can be formed by various known methods such as transfer of metal foil and film formation by vapor deposition. Next, the first pattern conductor 30 is formed from the metal film by patterning using a photolithography technique. In addition, the first wiring portion 38 and the first terminal portion 39 are formed on the first base material 26. The first wiring portion 38 and the first terminal portion 39 may be manufactured by patterning a metal film in the same manner as the first pattern conductor 30, or may be separately screen-printed from the first pattern conductor 30. It may be produced. As described above, the first touch panel sensor 21 in which the first pattern conductor 30 is provided on the first base material 26 is obtained. Further, the second touch panel sensor 22 is produced in the same manner as the first touch panel sensor 21. Then, the touch panel board | substrate 20 is obtained by positioning and bonding the produced 1st touch panel sensor 21 and the 2nd touch panel sensor 22. FIG. On the other hand, the touch panel substrate 20 shown in FIG. 4 is obtained by forming metal films on both surfaces of the base material 28 and patterning the pair of metal films.

  By the way, in the conventional touch panel substrate, the first pattern conductor and the second pattern conductor to be overlaid are each provided with a certain degree of regularity, and the first pattern so as not to have a great influence on each other pattern. By positioning the conductor and the second pattern conductor, for example, by positioning the pattern conductors of the same pattern with a half-pitch shift, attempts have been made to prevent the occurrence of shading. At the same time, the pattern conductor is designed in consideration of the periodicity direction and the periodic pitch of other members used in combination with the touch panel substrate (conductive pattern substrate), so that the touch panel substrate (conductive Attempts have been made to make the moire when the pattern substrate) and the other members overlap each other effectively. However, when a large number of touch panel substrates (conductive pattern substrates) are produced with the same design, it is possible to prevent shading unevenness in some products, while uneven shading is caused in some other products. May be observed. In addition, when a touch panel substrate (conductive pattern substrate) that should have been manufactured with the same design is overlapped with, for example, a display mechanism, moire can be made inconspicuous for some touch panel substrates (conductive pattern substrates). In other touch panel substrates (conductive pattern substrates), moire may be observed.

  As a result of intensive studies on such points, the present inventors, as a result of the first long diagonal 44 of the rhombus formed by the first opening region 43, the longer first long diagonal 44, and the second opening The touch panel substrate (conductive pattern substrate) 20 and the second long diagonal line 64, 65 of the rhombus formed by the region 63 form an angle of 85 ° to 95 ° with the longer second long diagonal line 64. It has been found that by adopting a configuration that has not been proposed in the past, such as superposing one pattern conductor 30, it is possible to avoid the occurrence of uneven shading and moire due to variations in manufacturing accuracy.

  As described in the section of the prior art, in the conventional touch panel substrate 120, the first pattern conductor 130 and the second linear conductor 160 are arranged in the same pattern with each other. The second pattern conductor 150 was manufactured, and the first pattern conductor 130 and the second pattern conductor 150 were overlapped so that the arrangement of the linear conductors 140 and 160 was shifted by a half pitch.

  Here, FIG. 11A shows such a conventional touch panel substrate 120. In the first pattern conductor 130 shown in FIG. 11A, like the first pattern conductor 30 described with reference to FIG. 5, the first linear conductors 140 are regularly arranged in a diamond shape. The first opening regions 143 are arranged in a mesh pattern. The acute interior angle of the rhombus formed by the first opening region 143 is 53.1 °. In the example shown in FIG. 11A, the second pattern conductor 150 is formed in the same manner as the first pattern conductor 130. In the touch panel substrate 120, a longer diagonal 144 of the two diagonals of the rhombus formed by the first opening region 143 and a longer diagonal 164 of the two diagonals of the rhombus formed by the second opening region 163, It is parallel. In the touch panel substrate 120, the second pattern conductor 150 is ½ of the length of the diagonal line (second long diagonal line) 144 in the long direction of the first opening region 143 defined by the first pattern conductor 130. Accordingly, the first opening region 143 is positioned so as to be shifted with respect to the first pattern conductor 130 in the direction of the diagonal line (first long diagonal line) 144 in the long direction. That is, the touch panel substrate 120 shown in FIG. 11A is configured by arranging the linear conductors 140 and 160 in a regular pattern by design. According to the design of the touch panel substrate 120, it is possible to prevent the occurrence of uneven density. In addition, according to the touch panel substrate 120 shown in FIG. 11A, the other members can be adjusted by adjusting in advance the direction and arrangement direction of the linear conductors with respect to the periodic structure of the other members to be superimposed. It is also possible to effectively prevent unintentional moire from being visually recognized when superimposed.

  However, when the touch panel substrate 120 is actually manufactured, the first pattern conductor 130 and the second pattern conductor 150 may be displaced from the expected relative positions due to manufacturing errors. Here, in FIG. 11B, the second pattern conductor 150 is only ¼ of the length of the shorter diagonal line (first short diagonal line) 145 of the first opening region 143 defined by the first pattern conductor 130. The first opening region 143 is displaced with respect to the first pattern conductor 130 in the direction of the longer diagonal line (first long diagonal line) 144. In FIG. 11C, the first pattern conductor 130 is rotated relative to the second pattern conductor 150 by 1 °. In the touch panel substrate 120 shown in FIG. 11B and FIG. 11C, shading unevenness that causes a problem in use is visually recognized, and moire that is problematic in use when overlapped with the display mechanism 12 is visually recognized. It was. That is, in the conventional touch panel substrate 120, even if the first pattern conductor 130 and the second pattern conductor 150 are slightly displaced, clear light and dark unevenness occurs with a new periodicity. It can also cause problems.

  In contrast, the touch panel substrate 20 shown in FIG. 9A is similar to the first pattern conductor 30 formed in the same manner as the first pattern conductor 130 in FIG. 11A and the second pattern conductor 150 in FIG. 11A. And a second pattern conductor 50 formed on the substrate. However, in the example shown in FIG. 9A, the longer diagonal 44 of the two diagonals of the rhombus formed by the first opening region 43 of the first pattern conductor 30 and the second opening of the second pattern conductor 50. Of the two diagonal lines of the rhombus formed by the region 63, the longer diagonal line 64 is orthogonal. And in the touch-panel board | substrate 20 shown by FIG. 9A, the shading unevenness is not produced. In addition, according to the touch panel substrate 20 shown in FIG. 9A, the orientation and arrangement direction of the linear conductors are adjusted in advance with respect to the periodic structure of other members, so that the other members overlap. It is also possible to effectively prevent unintentional moire from being visually recognized.

  9B and 9C show a state where the relative positions of the first pattern conductor 30 and the second pattern conductor 50 are shifted from the state shown in FIG. 9A. In FIG. 9B, the second pattern conductor 50 has a length equal to ¼ of the length of the shorter diagonal line (first short diagonal line) 45 of the first opening region 43 defined by the first pattern conductor 30. The opening region 43 is displaced with respect to the first pattern conductor 30 in the direction of the longer diagonal line (first long diagonal line) 44. In FIG. 9C, the first pattern conductor 30 is rotated relative to the second pattern conductor 50 by 1 °. In the touch panel substrate 20 shown in FIG. 9B and FIG. 9C, the shading that is problematic in use is not visually recognized, and the moire that is problematic in use when overlapped with the display mechanism 12 is also visually recognized. Was not. That is, unlike the conventional touch panel substrate 120, the touch panel substrate 20 shown in FIG. 9A is effective in reducing shading unevenness and moire even if the relative positions of the first pattern conductor 30 and the second pattern conductor 50 are shifted. It was possible to make it inconspicuous.

  Furthermore, in the touch panel substrate 20 shown in FIG. 10A, the first pattern conductor 30 is formed in the same manner as the first pattern conductor 130 of FIG. 11A. On the other hand, in the touch panel substrate 20 shown in FIG. 10A, the second pattern conductor 50 is a diamond-shaped second array arranged regularly, like the second pattern conductor 50 described above with reference to FIG. The second linear conductors 60 are arranged in a mesh pattern that defines the two opening regions 63. However, in the touch panel substrate 20 of FIG. 10A, unlike the touch panel substrate of FIGS. 9A and 11A, the rhombus formed by the first opening region 43 of the first pattern conductor 30 and the second opening region 63 of the second pattern conductor 50 are different. The rhombus formed has a different shape. That is, in the example shown in FIG. 10A, the acute interior angle of the rhombus formed by the first opening region 43 is 53.1 °, as in the examples shown in FIGS. 9A and 11A. On the other hand, in the example shown in FIG. 10A, the acute interior angle of the rhombus formed by the first opening region 43 is 43.5 °, unlike the examples shown in FIGS. 9A and 11A. In the example shown in FIG. 10A, the longer diagonal 44 of the two diagonals of the rhombus formed by the first opening region 43 of the first pattern conductor 30 and the second opening region 63 of the second pattern conductor 50. The longer diagonal line 164 of the two diagonal lines of the rhombus formed by is orthogonal. And in the touch-panel board | substrate 20 shown by FIG. 10A, the shading unevenness is not produced. In addition, according to the touch panel substrate 20 shown in FIG. 10A, the orientation and arrangement direction of the linear conductors are adjusted in advance with respect to the periodic structure of the other members, so that the other members overlap. It is also possible to effectively prevent unintentional moire from being visually recognized.

  10B and 10C show a state where the relative positions of the first pattern conductor 30 and the second pattern conductor 50 are shifted from the state shown in FIG. 10A. In FIG. 10B, the second pattern conductor 50 has a length equal to ¼ of the length of the shorter diagonal line (first short diagonal line) 45 of the first opening region 43 defined by the first pattern conductor 30. The opening region 43 is displaced with respect to the first pattern conductor 30 in the direction of the longer diagonal line (first long diagonal line) 44. In FIG. 10C, the first pattern conductor 30 is rotated relative to the second pattern conductor 50 by 1 °. In the touch panel substrate 20 shown in FIG. 10B and FIG. 10C, shading that is problematic to use is not visually recognized, and moire that is problematic to use when superimposed on the display mechanism 12 is also visually recognized. Was not. That is, unlike the conventional touch panel substrate 120, even with the touch panel substrate 20 shown in FIG. 10A, even if the relative positions of the first pattern conductor 30 and the second pattern conductor 50 are shifted, uneven shading and moire are effective. It was possible to make it inconspicuous.

  As described above, when the first long diagonal line 44 and the second long diagonal line 64 are at an angle of 85 ° or more and 95 ° or less, the inventors of the present invention have the first pattern at the time of manufacturing the touch panel substrate 20 or the like. Even if the conductor 30 and the second pattern conductor 50 are unintentionally misaligned, the shading unevenness can be effectively made inconspicuous, and other members including components having periodicity and the touch panel substrate 20 It was confirmed that the moire can be effectively made inconspicuous when piled up. On the other hand, in the current manufacturing technology, the displacement of the relative positions of the first pattern conductor 30 and the second pattern conductor 50 can be in a range of ± 1 °. Therefore, when it is aimed to position the first pattern conductor 30 and the second pattern conductor 50 so that the first long diagonal 44 and the second long diagonal 64 are orthogonal, the first long diagonal 44 and the second long diagonal 44 The diagonal line 64 is at least 85 ° to 95 °, and as a result, even if the first pattern conductor 30 and the second pattern conductor 50 are unintentionally misaligned, it is effective that uneven shading and moire are noticeable. Can be avoided.

  In addition, by setting the angle between the first long diagonal line 44 and the second long diagonal line 64 to 85 ° or more and 95 ° or less, it is possible to effectively make both the uneven density and the moire inconspicuous. Although details are unknown, the following can be estimated as one of the factors. First, since the linear conductors 40, 60 are regularly arranged in the pattern conductors 30, 50, in other words, the distribution of the linear conductors 40, 60 in the pattern conductors 30, 50 is uniform. Therefore, it is expected that the shading unevenness can be effectively made inconspicuous. At the same time, the two patterned conductors 30 and 50 are arranged so that the rhombic first long diagonal 44 formed by the first opening region 43 and the rhombic second long diagonal 64 formed by the second opening region 63 are substantially orthogonal to each other. Thus, the relevance and similarity of the mesh patterns of the two pattern conductors 30 and 50 can be effectively reduced. Thereby, it is presumed that the regularity of the combined mesh pattern can be effectively lost, and moire with other members can be effectively made inconspicuous. However, the present invention is not limited to the above estimation.

  As described above, in the present embodiment, the conductive pattern substrate (touch panel substrate) 20 is arranged in a first pattern arranged in a mesh pattern that defines regularly arranged rhombic first opening regions 43. A first pattern conductor 30 having a linear conductor 40 and a second pattern having second linear conductors 60 arranged in a mesh pattern defining regularly arranged rhombic second opening regions 63 And a conductor 50. In the conductive pattern substrate 20, the longer diagonal line (first long diagonal line) 44 of the two diagonal lines formed by the first opening region 43 and the two diagonal lines formed by the second opening region 63. The first pattern conductor 30 and the second pattern conductor 50 are positioned by positioning the first pattern conductor 30 and the second pattern conductor 50 so that the longer diagonal line (second long diagonal line) 64 is substantially orthogonal. Even if the first pattern conductor 30 and the second pattern conductor 50 are displaced or rotated in any direction, for example, even if the position of the first pattern conductor 30 or the second pattern conductor 50 is shifted, the unevenness in density can be made inconspicuous. Moire when combined with other members including a regular arrangement can be made inconspicuous. That is, the longer diagonal 44 of the two diagonals of the rhombus formed by the first opening region 43 and the longer diagonal 64 of the two diagonals of the rhombus formed by the second opening region 63 are 85 ° or more. By making an angle of 95 degrees or less, shading unevenness and moire can be effectively made inconspicuous.

  Further, when the shape of the first opening region 43 and the shape of the second opening region 63 are the same as in the example shown in FIGS. 9A, 9B, and 9C, the first pattern conductive The distribution of the linear conductors 50 in the pattern combining the first pattern conductors 30 and the second pattern conductors 50 is effectively uniformed without being affected by the positional deviation between the bodies 30 and the second pattern conductors 50. can do. As a result, the shading unevenness can be made inconspicuous more effectively.

  On the other hand, when the shape of the first opening region 43 and the shape of the second opening region 63 are different from each other as in the example shown in FIGS. 10A, 10B, and 10C, the two pattern conductors 30 are used. , 50 mesh patterns can be effectively reduced in relevance and similarity. As a result, the regularity of the combined mesh pattern can be more effectively lost, and moire when combined with other members having a regular arrangement can be effectively made inconspicuous.

  Further, as in the example shown in FIG. 3, when the first pattern conductor 30 is provided on the first base material 26 and the second pattern conductor 50 is provided on the second base material 27, For example, the electroconductive pattern board | substrate 20 is producible by bonding the 1st base material 26 and the 2nd base material 27 in which the pattern conductors 30 and 50 were formed. And according to the electroconductive pattern board | substrate 20 demonstrated here, even if the 1st base material 26 and the 2nd base material 27 shift | deviate a little at the time of bonding, generation | occurrence | production of the problem of a shading unevenness or a moire is avoided effectively. can do. Therefore, the configuration of the conductive pattern substrate 20 described here is suitable for the conductive pattern substrate 20 including the two base materials 26 and 27 that support the pattern conductors 30 and 50, respectively.

  On the other hand, as in the example shown in FIG. 4, the first pattern conductor 30 is provided on one side of the base material 28, and the second pattern conductor 50 is provided on the other side of the same base material 28. In this case, the conductive pattern substrate 20 can be produced by forming the first pattern conductor 30 and the second pattern conductor 50 on the base material 28 continuously or simultaneously. And according to the electroconductive pattern board | substrate 20 demonstrated here, even if the 1st pattern conductor 30 and the 2nd pattern conductor 50 shift a little at the time of formation, generation | occurrence | production of the problem of a shading unevenness or a moire is effective. Can be avoided. Therefore, the configuration of the conductive pattern substrate 20 described here is suitable for the conductive pattern substrate 20 including the single base material 28 supporting the two pattern conductors 30 and 50.

  Various modifications can be made to the above-described embodiment. Hereinafter, an example of modification will be described with reference to the drawings as appropriate. In the following description and the drawings used in the following description, the same reference numerals as those used for the corresponding parts in the above embodiment are used for the parts that can be configured in the same manner as in the above embodiment. A duplicate description is omitted.

  In the form of the above-mentioned embodiment, the example in which the electrodes 31 and 51 include the bulging parts 32 and 52 and the linear parts 33 and 53 was shown. That is, the example in which the pattern of the electrodes 31 and 51 is a so-called diamond pattern is shown. However, the pattern of the electrodes 31 and 51 is not particularly limited. For example, as shown in FIG. 12, a so-called stripe pattern may be employed as the pattern of the electrodes 31 and 51.

DESCRIPTION OF SYMBOLS 10 Display device 12 with a touch position detection function Display mechanism 15 Touch panel device 16a Long side 16b Short side 20 Touch panel substrate 20a Conductive pattern substrate 21 First touch panel sensor 22 Second touch panel sensor 23 Touch panel sensor 24 Transparent cover 26 First base material 27 Second base material 28 Base material 30 First pattern conductor 31 First electrode 32 First bulging portion 33 First linear portion 34 First dummy portion 35 First dividing portion 38 First wiring portion 39 First terminal portion 40 First linear conductor 41 First connection element 42 First branch point 43 First opening region 44 First long diagonal 45 First short diagonal 50 Second pattern conductor 51 Second electrode 52 Second bulge 53 Second Linear portion 54 second dummy portion 55 second dividing portion 58 second wiring portion 59 second terminal portion 60 second linear conductor 61 second connecting element 62 second branch point 63 second 2 opening region 64 2nd long diagonal

Claims (6)

A first pattern conductor having a first linear conductor arranged in a mesh pattern defining a regularly arranged rhomboid first opening region;
A second pattern conductor having second linear conductors arranged in a mesh pattern that defines regularly arranged rhombic second opening regions;
The longer diagonal of the two diagonals of the rhombus formed by the first opening region and the longer diagonal of the two diagonals of the rhombus formed by the second opening region are 85 ° or more and 95 ° or less. An angled conductive pattern substrate.   The conductive pattern substrate according to claim 1, wherein a shape of the first opening region and a shape of the second opening region are different from each other.   The conductive pattern substrate according to claim 1, wherein a shape of the first opening region and a shape of the second opening region are the same. A first base material provided with the first pattern conductor;
The electroconductive pattern board | substrate as described in any one of Claims 1-3 further provided with the 2nd base material in which the said 2nd pattern conductor was provided.   The conductive pattern according to any one of claims 1 to 3, further comprising a base material on which the first pattern conductor is provided on one side and the second pattern conductor is provided on the other side. substrate.   A display device with a touch position detection function, comprising the conductive pattern substrate according to claim 1 as a touch panel substrate.

Images