JP2016045961A - Touch panel sensor and display device with touch position detection function - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a touch panel sensor and display device with a touch position detection function in which, in a touch panel sensor for a mutual capacitance system, occurrence of Moire is curbed, and detection accuracy of a touch position is uniform in an in-plane.SOLUTION: A touch panel sensor comprises: a plurality of first electrodes 46 that is provided in a base material 32, and runs in a first direction D1; and a plurality of second electrodes 41 that is provided in the base material, and runs in a second direction D2. The first electrode and second electrode are composed of conducting wires 56 and 51 arranged in a mesh form. A plurality of regions R is defined that corresponds to each of parts where capacitive coupling occurs between the first electrode and the second electrode, and the first electrode and second electrode in one region are arranged in a pattern in which the conducting wires in adjacent two regions in the first direction are made mutually symmetric, and arranged in a pattern in which the conducting wires in adjacent two regions in a second direction are made mutually symmetric. A shape of an opening part in the first electrode and second electrode in each region is not uniform.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a touch panel sensor. The present invention also relates to a display device with a touch position detection function obtained by combining a touch panel sensor and a display device.

  In recent years, touch panel devices have been widely used as input means. The touch panel device includes a touch panel sensor, a control circuit that detects a contact position on the touch panel sensor, a wiring, and a flexible printed circuit board (FPC). In many cases, the touch panel device is used as an input means for various devices including a display device such as a liquid crystal display (LCD) or an organic EL display (for example, electronic devices such as smartphones, tablet terminals, car navigation devices). And used together with a display device. In such a device, the touch panel sensor is disposed on the display surface of the display device, thereby enabling extremely direct input to the display device. The area | region which faces the display area of a display apparatus among touch panel sensors is transparent, and this area | region of a touch panel sensor comprises the active area which can detect a contact position (approach position).

  As a touch panel sensor, a projection capacitive coupling type touch panel sensor is known. In a capacitively coupled touch panel sensor, a parasitic capacitance is newly generated when an external conductor (typically a finger) whose position is to be detected contacts (approaches) the touch panel sensor via a dielectric. The position of the external conductor on the touch panel sensor is detected on the basis of the change in capacitance caused by the parasitic capacitance. Such a projected capacitively coupled touch panel sensor includes, for example, a base material having a first surface and a second surface facing the first surface, and is provided on the first surface of the base material in the first direction. A plurality of first electrodes extending, and a plurality of second electrodes provided on the second surface of the substrate and extending in a second direction intersecting the first direction. The first electrode and the second electrode are made of, for example, a transparent conductive material having translucency and conductivity.

  As such a projected capacitive coupling type touch panel sensor, a self-capacitance type touch panel sensor and a mutual capacitive type touch panel sensor are more specifically known.

  In the self-capacitance type touch panel sensor, for example, as shown in Patent Document 1 (Japanese Patent Application Laid-Open No. 2013-69261), each of the first electrode and the second electrode has a rectangular or rhombic unit electrode connected at its corner. The unit electrodes of the first electrode and the unit electrodes of the second electrode are alternately arranged in a grid pattern so as not to overlap each other. In this type of touch panel sensor, a change in parasitic capacitance with respect to the ground of the first electrode and a change in parasitic capacitance with respect to the ground of the second electrode due to the proximity of an external conductor such as a finger are measured. . Therefore, when the outer conductor approaches two points at the same time, there is a disadvantage that ghost coordinates that cannot be distinguished from the true approach position are generated.

  On the other hand, in the mutual capacitance type touch panel sensor, for example, the first electrode extends in a strip shape in the first direction, and the second electrode extends in a strip shape in the second direction. The first electrode and the second electrode A plurality of regions defined corresponding to each of the portions intersecting with each other are arranged side by side along the first direction, and are also arranged side by side along the second direction. In this type of touch panel sensor, an electrostatic capacitance formed between the first electrode and the second electrode at a portion where the first electrode and the second electrode intersect due to the proximity of an external conductor such as a finger. Changes are measured. Therefore, it is possible to uniquely identify a plurality of touch positions.

  By the way, recently, in order to lower the electric resistance values of the first electrode and the second electrode, as a material constituting the first electrode and the second electrode, a metal such as silver or copper having higher conductivity than the transparent conductive material. It has been proposed to use materials. When the first electrode and the second electrode are made of a metal material, the first electrode and the second electrode are formed with openings for transmitting image light from the display device at an appropriate ratio. For example, the first electrode and the second electrode are made of a metal material and are configured by conductive wires arranged in a mesh shape.

  However, when the touch panel sensor including the first electrode and the second electrode having such a configuration is disposed on the display surface of the display device, the periodicity of the pixel arrangement of the display device and the opening of the first electrode and the second electrode The periodicity of the arrangement of the portions may interfere to form a striped pattern, that is, moire (interference fringe). In Patent Document 1, in order to suppress the occurrence of such moire, in the self-capacitance type touch panel sensor, the unit electrodes of the first electrode and the second electrode are arranged in a special mesh shape in which the shape of the opening is not constant. It has been proposed to be made up of conductive wires.

JP 2013-69261 A

  As proposed in Patent Document 1, in the self-capacitance type touch panel sensor, when the unit electrodes of the first electrode and the second electrode are constituted by conductive wires arranged in a special mesh shape in which the shape of the opening is not constant. The occurrence of moire is suppressed and good visibility is obtained.

  However, according to the knowledge of the present inventors, in the mutual capacitance type touch panel sensor, in order to achieve uniform detection sensitivity in the plane, the relative positional relationship between the first electrode and the second electrode is Although it is necessary to be the same in a plurality of regions defined corresponding to respective portions where capacitive coupling occurs between one electrode and the second electrode, each of the first electrode and the second electrode is simply opened. If the conductive wire is arranged in a special mesh shape in which the shape of the part is not constant, the relative positional relationship between the first electrode and the second electrode is not the same in the plurality of regions, and the touch of each region There may be a difference in position detection sensitivity.

  The present invention has been devised to pay attention to the above problems and to effectively solve them. SUMMARY OF THE INVENTION An object of the present invention is to provide a touch panel sensor and a display device with a touch position detection function in which the occurrence of moire is suppressed and the detection sensitivity of the touch position is uniform in the surface in the mutual capacitance type touch panel sensor. .

  The present invention is a mutual-capacitance type touch panel sensor, comprising a base material, a plurality of first electrodes provided on the base material and extending in a first direction, provided on the base material, and the first direction. A plurality of second electrodes extending in a second direction intersecting with the first electrode, the first electrode being a light-shielding and conductive conductor, wherein a mesh is formed so that an opening is formed between the conductors. The second electrode is also a light-shielding and electrically conductive wire, and is arranged in a mesh shape so that an opening is formed between the conductive wires. In the touch panel sensor, a plurality of regions are defined corresponding to each of the portions where capacitive coupling occurs between the first electrode and the second electrode, and the plurality of regions are , Arranged side by side along the first direction, and the second The first electrodes are arranged in a pattern in which the conductive wires in two regions adjacent to each other in the first direction are symmetrical with each other, and in the second direction. The conductive wires in two adjacent regions are arranged in a symmetrical pattern, and the shape of the opening in each region is not uniform, and the second electrode is adjacent in the first direction. The conductive wires in the two regions are arranged in a symmetrical pattern, and the conductive wires in the two regions adjacent to each other in the second direction are arranged in a symmetrical pattern, and each region The touch panel sensor is characterized in that the shape of the opening in the inside is not uniform.

  The touch panel sensor according to the present invention is usually used by being disposed on a display surface of a display device. In the touch panel sensor, a plurality of regions are defined corresponding to each portion where capacitive coupling occurs between the first electrode and the second electrode, and the shape of the opening of the first electrode in each region is uniform. In addition, since the shape of the opening of the second electrode in each region is not uniform, the arrangement of the opening in each region does not interfere with the periodicity of the pixel arrangement of the display device, and the generation of moire is effective. Is suppressed. The first electrode in one region is arranged in a pattern in which the conductors in two regions adjacent in the first direction are symmetrical to each other, and the conductor in the two regions adjacent in the second direction is The second electrodes in one area are arranged in a pattern in which the conductors in two areas adjacent to each other in the first direction are symmetrical to each other and in the second direction. Since the conducting wires in the two adjacent regions are arranged in a symmetrical pattern, the relative positional relationship between the first electrode and the second electrode is the same in the two regions adjacent in the first direction. At the same time, two regions adjacent in the second direction are the same, and this improves the in-plane uniformity of the touch position detection sensitivity.

  The present invention is a mutual-capacitance type touch panel sensor, comprising a base material, a plurality of first electrodes provided on the base material and extending in a first direction, provided on the base material, and the first direction. A plurality of second electrodes extending in a second direction intersecting with the first electrode, the first electrode being a light-shielding and conductive conductor, wherein a mesh is formed so that an opening is formed between the conductors. The second electrode is also a light-shielding and electrically conductive wire, and is arranged in a mesh shape so that an opening is formed between the conductive wires. In the touch panel sensor, a plurality of regions are defined corresponding to each of the portions where capacitive coupling occurs between the first electrode and the second electrode, and the plurality of regions are , Arranged side by side along the first direction, and the second Two half regions that are arranged side by side and are divided into two by a first straight line that passes through the center of the one region and is parallel to the first direction. Are arranged in a pattern that is symmetrical to each other, and the shape of the opening in each half region is not uniform, and the second electrode in one region is centered on the one region. The conductive wires in the two half regions divided by the first straight line parallel to the first direction are arranged in a symmetrical pattern, and the shape of the opening in each half region is uniform. It is a touch panel sensor characterized by not being.

  According to such a touch panel sensor, the touch position detection sensitivity in one area is symmetric between two half areas divided by the first straight line, and the touch position detection sensitivity is uniform in the first direction. Rise.

  The present invention is a mutual-capacitance type touch panel sensor, comprising a base material, a plurality of first electrodes provided on the base material and extending in a first direction, provided on the base material, and the first direction. A plurality of second electrodes extending in a second direction intersecting with the first electrode, the first electrode being a light-shielding and conductive conductor, wherein a mesh is formed so that an opening is formed between the conductors. The second electrode is also a light-shielding and electrically conductive wire, and is arranged in a mesh shape so that an opening is formed between the conductive wires. In the touch panel sensor, a plurality of regions are defined corresponding to each of the portions where capacitive coupling occurs between the first electrode and the second electrode, and the plurality of regions are , Arranged side by side along the first direction, and the second The two half-regions are arranged side by side along the direction, and the first electrode in one region is divided by a second straight line passing through the center of the one region and parallel to the second direction. Are arranged in a pattern that is symmetrical to each other, and the shape of the opening in each half region is not uniform, and the second electrode in one region is centered on the one region. The conducting wires in the two half regions divided by the second straight line parallel to the second direction are arranged in a symmetrical pattern, and the shape of the opening in each half region is uniform. It is a touch panel sensor characterized by not being.

  According to such a touch panel sensor, the touch position detection sensitivity in one area is symmetric between two half areas divided by the second straight line, and the touch position detection sensitivity is uniform in the second direction. Will increase.

  The present invention is a mutual-capacitance type touch panel sensor, comprising a base material, a plurality of first electrodes provided on the base material and extending in a first direction, provided on the base material, and the first direction. A plurality of second electrodes extending in a second direction orthogonal to the first electrode, the first electrode being a light-shielding and conductive conductor, and a mesh so that an opening is formed between the conductors The second electrode is also a light-shielding and electrically conductive wire, and is arranged in a mesh shape so that an opening is formed between the conductive wires. In the touch panel sensor, a plurality of regions are defined corresponding to each of the portions where capacitive coupling occurs between the first electrode and the second electrode, and the plurality of regions are , Arranged side by side along the first direction, and the second The first electrode in one region is 45 with respect to the first direction in a plane that passes through the center of the one region and is parallel to the plate surface of the substrate. The conductors in two half-regions divided by a third straight line that is inclined are arranged in a symmetric pattern and are parallel to the plate surface of the substrate through the center of the one region. The conductors in two half regions divided in half by a fourth straight line orthogonal to the third straight line in the plane are arranged in a pattern that is symmetrical to each other, and the openings in each half region are The shape of the second electrode in one region is not uniform, and the second electrode is inclined by 45 ° with respect to the first direction in a plane passing through the center of the one region and parallel to the plate surface of the substrate. Said conductor in two half-regions divided by two straight lines They are arranged in a pattern that is symmetrical to each other, and are divided into two by a fourth straight line that passes through the center of the one region and is parallel to the plate surface of the base material and orthogonal to the third straight line. In the touch panel sensor, the conductive wires in two half regions are arranged in a symmetrical pattern, and the shape of the opening in each half region is not uniform.

  According to such a touch panel sensor, the detection sensitivity of the touch position in one region is between two half regions divided by two by the third straight line and two half by two divided by the fourth straight line. Each region is symmetrical, and the in-plane uniformity of touch position detection sensitivity is increased.

  The present invention is a mutual-capacitance type touch panel sensor, comprising a base material, a plurality of first electrodes provided on the base material and extending in a first direction, provided on the base material, and the first direction. A plurality of second electrodes extending in a second direction intersecting with the first electrode, the first electrode being a light-shielding and conductive conductor, wherein a mesh is formed so that an opening is formed between the conductors. The second electrode is also a light-shielding and electrically conductive wire, and is arranged in a mesh shape so that an opening is formed between the conductive wires. The touch panel sensor is formed with a plurality of intersecting portions where the first electrode and the second electrode intersect in a plan view, and the intersecting portions are arranged along the first direction. And arranged side by side along the second direction. Each of the first electrodes has a plurality of regions arranged side by side along the first direction at a pitch of 1 / n (n is a natural number) of the arrangement pitch along the first direction of the intersecting portion. The conductors in the two regions adjacent to each other in the first direction are arranged in a symmetrical pattern, and the conductors in the two regions adjacent to each other in the second direction are symmetrical to each other The openings in each region are not uniform in shape, and each second electrode has a pitch of 1 / m (where m is the arrangement pitch along the second direction of the intersection). A plurality of regions arranged side by side in the second direction at a pitch of (natural number), and the conductive wires in the two regions adjacent to each other in the first direction are arranged in a symmetric pattern. And two adjacent regions in the second direction Of which said lead is disposed in a pattern symmetrical to each other, a touch panel sensor, wherein the shape of the opening in each region not uniform.

  According to such a touch panel sensor, each first electrode has a symmetrical pattern (unit pattern) repeatedly arranged at a pitch of 1 / n (n is a natural number) of the arrangement pitch along the first direction of the intersection. In addition, each second electrode has a symmetrical pattern (unit pattern) that is repeatedly arranged at a pitch of 1 / m (m is a natural number) of the arrangement pitch along the second direction of the intersection. Will improve.

  In the touch panel sensor according to the present invention, the lead wire of the first electrode in one region is formed by a plurality of boundary line segments extending between two branch points and defining the opening of the first electrode. An average of the number of boundary line segments extending from the branch point is 3.0 or more and less than 4.0, and the conductor of the second electrode in one region extends between two branch points to the second The average of the number of boundary line segments formed from a plurality of boundary line segments that define the opening of the electrode and extending from one branch point may be 3.0 or more and less than 4.0.

  In the touch panel sensor according to the present invention, the first electrode is provided on the first surface of the base so as to extend in a strip shape in the first direction, and the second electrode is the first of the base. A plurality of regions are provided on a second surface opposite to one surface so as to extend in a strip shape in the second direction, and each of the plurality of regions is provided at each of the portions where the first electrode and the second electrode intersect in a plan view. It may be defined correspondingly.

  In addition, the present invention is a display device with a touch position detection function including the touch panel sensor described above.

  According to the touch panel sensor and the display device with a touch position detection function according to the present invention, the in-plane uniformity of the touch position detection sensitivity is increased.

FIG. 1 is a perspective view schematically showing a display device with a touch position detection function according to a first embodiment of the present invention. FIG. 2 is a plan view showing a touch panel sensor in the display device with a touch position detection function of FIG. FIG. 3 is an enlarged plan view showing a portion of the first electrode surrounded by an alternate long and short dash line with a symbol B in the touch panel sensor of FIG. FIG. 4 is an enlarged plan view showing the second electrode of the part surrounded by the alternate long and short dash line labeled B in the touch panel sensor of FIG. FIG. 5 is a diagram for explaining a pattern of the conductive wire of the first electrode in FIG. 3. FIG. 6 is a diagram for explaining a method of designing the pattern of the conductive wire of the first electrode in FIG. 5, and is a diagram showing a method for determining a generating point. FIG. 7 is a diagram for explaining a method of designing the conductor pattern of the first electrode in FIG. 5, and is a diagram showing a method of determining a generating point. FIG. 8 is a diagram for explaining a method for designing the pattern of the conductive wire of the first electrode in FIG. 5 and is a diagram showing a method for determining a generating point. 9A to 9D are diagrams showing the determined mother point group in the absolute coordinate system and the relative coordinate system, and are diagrams for explaining the degree of dispersion of the mother point group. FIG. 10 is a diagram for explaining a method of designing the lead pattern of the first electrode in FIG. 5 and shows a method of creating a Voronoi diagram from the determined mother point and determining the pattern. FIG. 11A is a plan view showing a conductor pattern of the first electrode according to the second and third embodiments. FIG.11 (b) is a top view which shows the modification of the pattern of the conducting wire of the 2nd electrode by 2nd and 3rd embodiment. FIG. 12A is a plan view showing a conductor pattern of the first electrode according to the fourth embodiment. FIG. 12B is a plan view showing a conductor pattern of the second electrode according to the fourth embodiment. FIG. 13 is a plan view showing a modification in which a dummy pattern is provided between two adjacent second electrodes. FIG. 14 is an enlarged plan view showing the second electrode and the dummy pattern of FIG.

  Embodiments of the present invention will be described below with reference to the drawings. Note that, in the drawings attached to the present specification, for the sake of easy understanding of the drawings, the scale and the vertical / horizontal dimension ratio are appropriately changed and exaggerated from those of the actual ones.

[First Embodiment]
FIG. 1 is a development view showing a display device with a touch position detection function according to a first embodiment of the present invention.

  As shown in FIG. 1, the display device with a touch position detection function 10 according to the present embodiment is configured by combining a touch panel sensor 30 and a display device 15 such as a liquid crystal display or an organic EL display.

  In the illustrated example, the display device 15 is configured as a flat panel display. The display device 15 includes a display panel 16 having a display surface 16 a and a display control unit (not shown) connected to the display panel 16. As shown in FIG. 1, the display panel 16 includes an active area A1 that can display an image, and an inactive area (also referred to as a frame area) that is disposed outside the active area A1 so as to surround the active area A1. A2. In the active area A1, a large number of pixels are periodically arranged in a predetermined pattern (for example, a square lattice pattern). The display control unit processes information relating to the video to be displayed, and drives the display panel 16 based on the video information. The display panel 16 displays a predetermined image on the display surface 16a by controlling light emission of each pixel based on a control signal from the display control unit. That is, the display device 15 plays a role as an output device that outputs information such as characters and drawings as video.

  Returning to FIG. 1, the touch panel sensor 30 of the present embodiment is bonded to the display surface 16 a of the display device 15 via, for example, an adhesive layer (not shown).

  FIG. 2 is a plan view showing the touch panel sensor 30 when viewed from the observer side.

  The touch panel sensor 30 of the present embodiment is configured as a projected capacitive coupling type touch panel sensor. The “capacitance coupling” method is also called “capacitance” method, “capacitance coupling” method, etc. in the technical field of the touch panel. It is treated as a term that is synonymous with the method.

  As shown in FIG. 2, the touch panel sensor 30 is provided on the base 32, the plurality of first electrodes 46 provided on the base 32 and extending in the first direction D1, and the first direction. And a plurality of second electrodes 41 extending in a second direction D2 orthogonal to the first direction D1, for example, intersecting with D1. In the present embodiment, the substrate 32 has a first surface 32 a and a second surface 32 b that faces the first surface 32 a, and the first electrode 46 is formed on the first surface 32 a of the substrate 32. The second electrode 41 is provided on the second surface 32b of the substrate 32 so as to extend in the second direction D2 so as to extend in the first direction D1. In FIG. 2, the components provided on the second surface 32 b side of the base material 32 are represented by solid lines, and the components provided on the first surface 32 a side of the base material 32 are represented by dotted lines. ing.

  In the present embodiment, the base material 32 has rigidity that supports each of the first electrode 46 and the second electrode 41 and has a dielectric constant that functions as a dielectric in the touch panel sensor 30. . As a material constituting the base material 32, for example, a material having sufficient translucency such as polyethylene terephthalate (PET), cycloolefin polymer (COP), glass or the like is used.

  In the present embodiment, as shown in FIG. 1, the first surface 32a is a surface facing the display device 15 side, and the second surface 32b is a surface facing the observer side.

  Further, as shown in FIG. 1, the base material 32 surrounds the active area Aa1 having a rectangular shape corresponding to an area where the touch position (position where the external conductor is approaching) can be detected, and the active area Aa1. And a rectangular frame-like inactive area Aa2 arranged outside the active area Aa1. The active area Aa1 and the inactive area Aa2 are partitioned corresponding to the active area A1 and the inactive area A2 of the display panel 16, respectively.

  As shown in FIG. 2, the first electrode 46 and the second electrode 41 are arranged in the active area Aa1. More specifically, in the active area Aa1, the plurality of first electrodes 46 are arranged side by side at a predetermined interval along the second direction D2, and the plurality of second electrodes 41 are arranged in the first direction D1. Are arranged side by side at a predetermined interval. Usually, the arrangement pitch of the first electrodes 46 in the second direction D2 is the same as the arrangement pitch of the second electrodes 41 in the first direction D1. The arrangement pitch of the first electrode 46 and the second electrode 41 is determined according to the resolution required for detection of the touch position, and is, for example, 4 mm to 5 mm.

  As shown in FIG. 2, a plurality of regions R are defined in the active area Aa <b> 1 corresponding to each portion where capacitive coupling occurs between the first electrode 46 and the second electrode 41. In the present embodiment, the plurality of regions R are defined corresponding to each of the portions where the first electrode 46 and the second electrode 41 intersect in plan view. The plurality of regions R are arranged side by side along the first direction D1, and are also arranged side by side along the second direction D2.

  On the other hand, as shown in FIG. 2, on the first surface 32a of the base material 32 in the inactive area Aa2, a plurality of first frame wirings 48 electrically connected to the first electrodes 46, and the base material A plurality of first terminal portions 49 that are disposed in the vicinity of the outer edge of 32 and are electrically connected to the first frame wirings 48 are provided. In addition, on the second surface 32b of the base material 32 in the inactive area Aa2, a plurality of second frame wirings 43 electrically connected to the respective second electrodes 41 and the vicinity of the outer edge of the base material 32 are arranged. A plurality of second terminal portions 44 that are electrically connected to the respective second frame wirings 43 are provided.

  In the present embodiment, a predetermined drive signal for detecting a touch position, for example, a pulse signal is transmitted to the first electrode 46 through the first terminal portion 49 and the first frame wiring 48 in order. It has become. This drive signal is transmitted to the second electrode 41 through capacitive coupling between the first electrode 46 and the second electrode 41, and is taken out to the outside through the second frame wiring 43 and the second terminal portion 44 in order. It is supposed to be. As described above, in the touch panel sensor 30 of the present embodiment, the first electrode 46 and the second electrode 41 function as a drive electrode and a detection electrode in a so-called mutual capacitance type touch panel sensor, respectively.

  Next, the detailed structure of the first electrode 46 and the second electrode 41 will be described with reference to FIGS. 3 and 4. FIG. 3 is an enlarged plan view showing the first electrode 46 in a portion surrounded by an alternate long and short dash line with a symbol B in FIG. FIG. 4 is an enlarged plan view showing the second electrode 41 in a portion surrounded by an alternate long and short dash line with a symbol B in FIG.

  In the present embodiment, as shown in FIG. 3, the first electrode 46 is a conductive wire 56 having light shielding properties and electrical conductivity, and has a mesh shape so that an opening 56 a is formed between the conductive wires 56. It is comprised from the arrange | positioned conducting wire 56. FIG. Further, as shown in FIG. 4, the second electrode 41 is also a light-shielding and conductive wire 51, and the wire is arranged in a mesh shape so that an opening 51 a is formed between the wires 51. 51. As a material constituting the conducting wires 56 and 51, silver, copper, chromium, an alloy thereof, or the like can be used. As described above, by configuring the first electrode 46 and the second electrode 41 using a metal material having high conductivity, the electrical resistance values of the first electrode 46 and the second electrode 41 can be sufficiently lowered. .

  The line widths of the conductors 56 and 51 are set according to the required aperture ratio (ratio of the area occupied by the openings 56a and 51a in the total area of the electrodes 46 and 41). Is set in the range of 1 μm to 10 μm, more preferably in the range of 1 μm to 5 μm. Thereby, the influence which conducting wire 56 and 51 has with respect to the image | video from the display apparatus 15 which an observer visually recognizes can be made low to a negligible level. The thicknesses of the conductive wires 56 and 51 are appropriately set according to the electric resistance value required for the electrodes 46 and 41, and are within a range of 0.1 μm to 2 μm, for example.

  The conductive wires 56 and 51 arranged in a mesh shape are formed by, for example, laminating a conductive metal layer such as copper or aluminum on the substrate 32 and etching the metal layer in a desired pattern, or acrylic resin or polyester. On the base material 32 by a conventionally known method such as a method of printing a conductive ink in which a conductive metal particle such as silver, copper, nickel or the like is dispersed in a binder resin such as a resin in a desired pattern. Can be formed.

  In the present embodiment, as shown in FIGS. 3 and 4, the shape of the opening 56 a of the first electrode 46 in one region R is not uniform, and the opening of the second electrode 41 in one region R. The shape of the part 51a is not uniform. In the illustrated example, the arrangement pattern of the conductors 51 of the second electrode 41 in one region R is substantially the same as the arrangement pattern of the conductors 56 of the first electrode 46 in one region R. The arrangement pattern of the conductive wires 56 of the first electrode 46 in one region R will be described in detail as a representative.

  As shown in FIG. 3, the conducting wire 56 of the first electrode 46 includes a plurality of branch points 56b, and includes a plurality of boundary line segments 56c that form the branch points 56b at both ends. That is, the conducting wire 56 of the first electrode 46 in one region R is composed of a plurality of boundary line segments 56c extending between the two branch points 56b. An opening 56a is defined by connecting the boundary line segment 56c at the branch point 56b. In other words, an opening 56a is defined as one closed region surrounded by a boundary line segment 56c. As shown in FIG. 3, since the conducting wire 56 is composed only of the boundary line segment 56c, there is no conducting wire 56 that extends into the opening 56a and becomes a dead end. Thereby, it is possible to provide the first electrode 46 with sufficient low resistance and high transparency at the same time.

  Further, in the first electrode 46 of the present embodiment, in one region R, there is no linear direction in which the openings 56a are arranged at a constant pitch.

  Here, FIG. 5 shows a state in which the shape of the openings 56a is not uniform, in other words, there is no direction in which the openings 56a are arranged at a constant pitch, and in other words, the openings 56a are regularly arranged. It is a top view for demonstrating the state where the made direction does not exist, and also the state where the opening part 56a was arranged with regularity does not exist.

In Figure 5, on the sheet surface of the first electrode 46 in one region R, a single virtual straight line d _i facing any direction at any position is selected. Linear d _i of the single forms an intersection crossing the boundary line 56c of the lead 56. The intersections are shown as intersections C ₁ , C ₂ , C ₃ ,..., C _{9 in} order from the lower left side of the drawing.

  Note that the “sheet surface (plate surface, film surface)” is a sheet-like member (plate-like) that is the target when the target sheet-like (plate-like, film-like) member is viewed as a whole and globally. It refers to the surface that coincides with the plane direction of the member or film-like member.

Adjacent intersections, for example, the distance between the intersection _{C 1} and the intersection _{C 2} is the dimension _{T 1} of the on linear _{d i} of a certain one opening 56a. Next, also another opening 56a adjacent to each other along a straight line _{d i} with respect to the opening 56a with dimensions _{T 1,} likewise, is determined dimension _{T 2} of the on linear _{d i.} Then, the linear d _i any direction at any position, from the boundary line 56c that intersects the straight line d _i, the plurality of openings 56a to encounter any direction of linear d _i at an arbitrary position, on the straight line d _i T ₁ , T ₂ , T ₃ ,..., T ₈ are determined. And the arrangement of the numerical values of T ₁ , T ₂ , T ₃ ,..., T ₈ has no periodicity (regularity). For example, the openings 42a are arranged so as not to have regularity along the linear direction d _i ,
T _k ≠ T _{k + 1} (k: arbitrary natural number, l: arbitrary natural number)... Conditional expression (x) may be satisfied. In FIG. 5, the _{T 1, T 2, T 3} , ······, T 8 is the drawing down as easily understandable, drawn separate from the first electrode 46 with the straight line _{d i} is there.

The dimensional T ₁ of the respective openings 56a for another linear d _{i + 1} where the straight line d _i is rotated by an arbitrary angle from those shown in FIG. _5, T _2, when seeking ..., also shown in FIG. 5 as if they were, with respect to the different linear _{d i + 1} direction, the dimension _{T 1, T} 2 of the opening 56a, periodic repeated ... (regularity) is not observed. As described above, when no periodicity (regularity) is observed in the dimensions of the openings 56a in any direction, the shapes of the openings 56a are not uniform, or the openings 56a are arranged at a constant pitch. There is no direction in which the openings 56a are regularly arranged, or there is no direction in which the openings 56a have a repeating cycle, or the arrangement of the openings 56a has regularity. We express that we do not have.

  In the present embodiment, as shown in FIGS. 3 and 4, the average number of boundary line segments 56c extending from one branch point 56b in the first electrode 46 in one region R is 3.0 or more. The average number of boundary line segments 51c extending from one branch point 51b in the second electrode 41 in one region R is 3.0 or more and less than 4.0. Yes.

  The first electrode 46 in one region R will be described as a representative. When the average number of boundary line segments 56c extending from one branch point 56b is 3.0 or more and less than 4.0, The arrangement pattern of the conductive wires 56 can be a pattern that is greatly different from the square lattice arrangement. Further, when the average number of boundary line segments 56c extending from one branch point 56b is greater than 3.0 and less than 4.0, the pattern can be greatly different from the honeycomb arrangement.

  Strictly speaking, the average number of boundary line segments 56c extending from one branch point 56b is the boundary line segment 56c extending from all the branch points 56b included in the first electrode 46 in one region R. However, in actuality, one branch point is determined in consideration of the size of the opening 56a per one portion defined by the conducting wire 56, and the like. The number of boundary line segments 56c extending for branching points 56b included in a section having an area expected to reflect the overall tendency of the number of boundary line segments 56c extending from 56b is examined and the average value is obtained. The calculated value may be handled as an average value of the number of boundary line segments 56c extending from one branch point 56b for the electrode.

  Also, regarding whether or not there is a direction in which the openings 56a are arranged at a constant pitch, strictly speaking, the arrangement of the openings 56a in an arbitrary direction within one target region R should be investigated. Become. However, in practice, in one section having an area expected to reflect the overall tendency of the arrangement of the openings 56a, it passes through one point at the center and reflects the tendency of periodicity in all directions. Then, with respect to each direction equally divided by an angle that can be expected (for example, every 15 ° direction), the arrangement of the openings 56a is investigated, and whether or not the opening areas are in a regularly arranged direction or not. You just have to judge.

  Here, the average of the number of boundary line segments 56c extending from one branch point 56b is greater than 3.0 and less than 4.0, and the conductive wire 56 having no linear direction in which the openings 56a are arranged at a constant pitch. An example of a method for producing the pattern will be described below.

  The method described below includes a step of determining a generating point, a step of creating a Voronoi diagram from the determined generating point, and a boundary segment extending between two Voronoi points connected by one Voronoi boundary in the Voronoi diagram. And determining the pattern of the first electrode 46 (conductive line 56) in one region R by determining the thickness of the determined path and defining each boundary line segment. Have. Hereinafter, each step will be described in order. Note that the patterns shown in FIG. 3 and FIG. 4 described above are patterns actually determined by the method described below.

  First, the process of determining a generating point will be described. First, as shown in FIG. 6, a first generating point (hereinafter referred to as “first generating point”) BP1 is arranged at an arbitrary position in the absolute coordinate system XY. Next, as shown in FIG. 7, the second generating point BP2 is arranged at an arbitrary position separated from the first generating point BP1 by a distance r. In other words, the second generating point can be placed at an arbitrary position on the circumference of the radius r (hereinafter referred to as “first circumference”) located on the absolute coordinate system XY around the first generating point BP1. BP2 is arranged. Next, as shown in FIG. 8, the third generating point BP3 is arranged at an arbitrary position away from the first generating point BP1 by a distance r and from the second generating point BP2 by a distance r or more. Thereafter, the fourth generating point is arranged at an arbitrary position separated from the first generating point BP1 by the distance r and from the other generating points BP2 and BP3 by the distance r or more.

  In this way, the mother point is arranged at an arbitrary position away from the first mother point BP1 by the distance r and away from the other mother points until the next mother point cannot be arranged. Go. Thereafter, this operation is continued based on the second generating point BP2. That is, the next generating point is arranged at an arbitrary position separated from the second generating point BP2 by the distance r and from the other generating points by the distance r or more. Based on the second generating point BP2, until the next generating point cannot be arranged, it is at an arbitrary position away from the second generating point BP2 by the distance r and from the other generating points by the distance r or more. Place the mother point. Thereafter, the base point as a reference is sequentially changed, and the base point is formed in the same procedure.

  With the above procedure, the mother point is arranged until it becomes impossible to arrange the mother point within the range where the first electrode 46 is to be formed in one region R. When the generating point cannot be arranged in the range where the first electrode 46 is to be formed in one region R, the step of generating the generating point is completed. By the processing so far, a group of irregularly arranged points on the two-dimensional plane (XY plane) is uniformly dispersed within a range where the first electrode 46 is to be formed in one region R. It becomes.

With respect to the generating point groups BP1, BP2,..., BP6 (see FIG. 9A) distributed in the two-dimensional plane (XY plane) in such a process, the distances between the individual generating points are not constant. Have However, the range between any distribution completely random distribution of distances between two adjacent base points (uniformly distributed) but without the upper limit value R _MAX and the lower limit value R _MIN across the mean value R _AVG [Delta] R = It is distributed in R _MAX -R _MIN . Note that, here, if two Voronoi regions XA are adjacent to each other but two Voronoi regions XA are adjacent to each other after a Voronoi diagram is generated from the generating point groups BP1, BP2,... It is defined that the generating points of are adjacent to each other.

That is, the coordinate point group described here is referred to as a coordinate system having the respective origins as origins (referred to as a relative coordinate system oxy, while a coordinate system defining an actual two-dimensional plane is referred to as an absolute coordinate system O 9 (B), FIG. 9 (C),..., In which all generating points adjacent to the generating point placed on the origin are plotted, are obtained for all generating points. Then, when the graph of the adjacent generating point group on all the relative coordinate systems is displayed with the origin o of each relative coordinate system superimposed, a graph as shown in FIG. 9D is obtained. The distribution pattern of adjacent mother point groups on the relative coordinate system is not a uniform distribution in which the distance between any two adjacent mother points constituting the mother point group is from 0 to infinity, but from R _AVG -ΔR. It means that it is distributed within a finite range up to R _AVG + ΔR (doughnut-shaped region from radius R _MIN to R _MAX ). In FIG. 9A, the Voronoi boundaries (see FIG. 10) obtained from these generating point groups are shown by broken lines for reference.

  By setting the distance between each generating point in this way, the Voronoi region XA obtained from the generating point group by the method described below, and also the distribution of the area of the opening 56a obtained therefrom are uniform. It is not distributed (completely random) but distributed within a finite range.

  Note that, in the above-described step of determining the generating point, the size of the opening 56a per one can be adjusted by changing the size of the distance r. Specifically, by reducing the size of the distance r, it is possible to reduce the size of the opening 56a per one, and conversely by increasing the size of the distance r, The size of the opening 56a can be increased.

  Next, as shown in FIG. 10, a Voronoi diagram is created on the basis of the arranged generating points. As shown in FIG. 10, the Voronoi diagram is a diagram composed of line segments that are drawn at a perpendicular bisector between two adjacent generating points and connected at the intersection of the bisectors. . Here, the line segment of the perpendicular bisector is called a Voronoi boundary XB, the intersection of the Voronoi boundaries XB forming the ends of the Voronoi boundary XB is called a Voronoi point XP, and a region surrounded by the Voronoi boundary XB is a Voronoi region Called XA.

  In the Voronoi diagram created as shown in FIG. 10, each Voronoi point XP forms a branch point 56 b of the conducting wire 56. Then, one boundary line segment 56c is provided between two Voronoi points XP forming the end of one Voronoi boundary XB. At this time, the boundary line segment 56c may be determined so as to extend linearly between the two Voronoi points XP as in the example shown in FIG. 3, or in contact with another boundary line segment 56c. Various paths between the two Voronoi points XP within a range (for example, a circle (arc), an ellipse (arc), a parabola, a hyperbola, a sine curve, a hyperbolic sine curve, an elliptic function curve, a Bessel function curve, etc., It may be extended by a broken line or the like. When the boundary line segment 56c is determined to extend linearly between two Voronoi points XP as in the example shown in FIG. 3, each Voronoi boundary XB defines the boundary line segment 56c. It becomes like this.

After determining the path of each boundary line segment 56c, the line width (thickness) of each boundary line segment 56c is determined.
The line width of the boundary line segment 56c is, for example, as described above so that the aperture ratio falls within a desired range, that is, the first electrode 46 exhibits desired electrical conductivity and visible light transmittance. The line width is determined as follows. As described above, the arrangement pattern of the conductors 56 of the first electrode 46 in one region R can be determined. Similarly, the arrangement pattern of the same lines 51 of the second electrodes 41 in one region R can be determined.

  3 and 4, in the present embodiment, the first electrode 46 in one region R is arranged in a pattern in which the conductive wires 56 in two regions R adjacent in the first direction D1 are symmetrical to each other. In addition, the conductive wires 56 in two regions R adjacent in the second direction D2 are arranged in a symmetric pattern, and the second electrode 41 in one region R is adjacent to the first direction D1. The conducting wires 51 in the two matching regions R are arranged in a symmetrical pattern, and the conducting wires 51 in the two regions R adjacent in the second direction D2 are arranged in a symmetrical pattern. In the illustrated example, the first electrode 46 and the second electrode 41 in one region R are in a pattern in which the conducting wires 56 and 51 in two regions R adjacent in the first direction D1 are translationally symmetric with each other. The conductors 56 and 51 in the two regions R adjacent to each other in the second direction D2 are arranged in a pattern having translational symmetry with each other. In other words, when the conductor 56 of the first electrode 46 in one region R is translated in the first direction D1 by the distance between the centers of two regions R adjacent in the first direction D1, the first direction D1 When the parallel movement is made in the second direction D2 by the distance between the centers of the two regions R adjacent to each other in the second direction D2 in accordance with the arrangement pattern of the conductors 56 of the first electrode 46 in another adjacent region R, The arrangement pattern of the conducting wires 56 of the first electrode 46 in another region R adjacent in the two directions D2 is matched. Further, when the conductor 51a of the second electrode 41 in one region R is translated in the first direction D1 by the distance between the centers of the two regions R adjacent in the first direction D1, the conductor 51a is adjacent to the first direction D1. When the parallel movement is made in the second direction D2 by the distance between the centers of the two regions R adjacent to each other in the second direction D2 in accordance with the arrangement pattern of the conductive wires 51a of the second electrode 41 in another matching region R, the second The arrangement pattern of the conductive wires 51a of the second electrode 41 in another region R adjacent in the direction D2 is matched.

  In addition, about the conducting wire 56 of the 1st electrode 46 and the conducting wire 51 of the 2nd electrode 41 in one area | region R, the symmetry regarding two area | regions R adjacent to 1st direction D1, and two area | regions adjacent to 2nd direction D2 The symmetry with respect to R is not limited to translational symmetry, but may be rotational symmetry or mirror image symmetry. In this case, the difference in signal level due to the arrangement pattern of the conductive wires 56 and 51 of the electrodes 46 and 41 between the side edges on the opposite sides of the two regions R adjacent in the first direction D1 or the second direction D2. (Step) can be reduced, and thereby, malfunctions of the touch panel sensor 30 that can be caused by external noise can be effectively reduced. When the conducting wire 51 of the first electrode 46 or the second electrode 41 in one region R has a density distribution, the conducting wires 51 in the two regions R adjacent in the first direction D1 or the second direction D2 are translated from each other. When arranged in a symmetric pattern, a lead wire is abruptly connected between the two regions R at each boundary side edge on the opposite sides of the two regions R adjacent to each other in the first direction D1 or the second direction D2. A portion where the density changes is generated, and this becomes a sudden change in light transmittance or reflectance, so that the boundary between the two regions R is easily visible. On the other hand, when the conducting wires 51 in the two regions R adjacent to each other in the first direction D1 or the second direction D2 are arranged in a pattern having rotational symmetry or mirror image symmetry with each other, between the two regions R It is possible to suppress a change in the conductive wire density, thereby effectively preventing the boundary between the two regions R from being visually recognized.

  In the illustrated example, the arrangement of the conducting wires 56 of the first electrode 46 is a repetitive pattern in which the distance (arrangement pitch) between the centers of two regions R adjacent in the first direction D1 is one cycle, that is, The conducting wire 56 of the first electrode 46 positioned outside each region R also has translational symmetry with respect to the first direction D1, but this is not always necessary in terms of increasing the uniformity of detection sensitivity. The arrangement of the conductive wires 56 of the first electrode 46 is a repetitive pattern in which the distance (arrangement pitch) between the centers of two regions R adjacent in the first direction D1 is one cycle, which facilitates pattern design. It is preferable from the point. Similarly, in the illustrated example, the arrangement of the conducting wires 51 of the second electrode 41 is a repetitive pattern in which the distance (arrangement pitch) between the centers of two regions R adjacent in the second direction D2 is one cycle. In other words, the conducting wire 51 of the second electrode 41 positioned outside each region R also has translational symmetry with respect to the second direction D2, but this is not always necessary in terms of increasing the uniformity of detection sensitivity. . The arrangement of the conducting wires 51 of the second electrode 41 is a repetitive pattern in which the distance (arrangement pitch) between the centers of two regions R adjacent in the second direction D2 is one cycle, which facilitates pattern design. It is preferable from the point.

  According to the present embodiment as described above, the shape of the opening 56a of the first electrode 46 in each region R is not uniform as shown in FIG. 3, and each region R as shown in FIG. Since the shape of the opening 51a of the second electrode 41 is not uniform, the arrangement of the openings 56a and 51a in each region R does not interfere with the periodicity of the pixel arrangement of the display device 15 and is striped. Generation of patterns, that is, moire can be effectively suppressed.

  Further, according to the present embodiment, as shown in FIG. 3, the first electrode 46 in one region R is a pattern in which the conductive wires 56 in two regions R adjacent in the first direction D1 are symmetrical to each other. And the conductive wires 56 in two regions R adjacent to each other in the second direction D2 are arranged in a symmetric pattern, and as shown in FIG. 4, the second electrode in one region R 41, the conductors 51 in the two regions R adjacent in the first direction D1 are arranged in a symmetrical pattern, and the conductors 51 in the two regions R adjacent in the second direction D2 are symmetrical with each other. Since the first electrode 46 and the second electrode 41 are arranged in a pattern, the relative positional relationship between the two regions R adjacent to each other in the first direction D1 is the same as that in the second direction D2. Two areas R that fit Also become the same, thereby, the in-plane uniformity of the touch position detection sensitivity (uniformity) can be improved.

[Second Embodiment]
FIG. 11A and FIG. 11B are plan views showing patterns of the conducting wires 56 and 51 of the electrodes 46 and 41 according to the second embodiment. About the whole structure of the display apparatus 10 with a touch position detection function and the touch panel sensor 30 in this Embodiment, Especially the whole structure of the display apparatus 10 with a touch position detection function and the touch panel sensor 30 demonstrated with reference to FIG. 1 and FIG. Since this is the same as in the first embodiment, description thereof is omitted.

  In the example shown in FIG. 11A and FIG. 11B, the first electrode 46 in one region R is 2 by a first straight line L1 passing through the center of the one region R and parallel to the first direction D1. Conductive wires 56 in two divided half regions are arranged in a pattern that is symmetrical (mirror symmetry or rotational symmetry), and the second electrode 41 in one region R is also the center of the one region R. Conductive wires 51 in two half regions divided by a first straight line L1 passing through the first direction D1 and parallel to the first direction D1 are arranged in a pattern that is symmetrical (mirror symmetry or rotational symmetry). In this case, the relative positional relationship between the first electrode 46 and the second electrode 41 in one region R is symmetric (mirror symmetry or rotational symmetry) with respect to two half-regions divided by the first straight line L1. Therefore, the detection sensitivity of the touch position in one region R is also symmetric (mirror image symmetry or rotational symmetry) with respect to the two half regions divided by the first straight line L1. Thereby, the uniformity (uniformity) of the touch position detection sensitivity can be further improved in the first straight line L1.

  In the present embodiment, in the first electrode 46 and the second electrode 41, the conductive wires 56 in the two half regions are arranged in a pattern that is mirror-image symmetric or rotationally symmetric with each other. A difference (step) in signal level caused by the arrangement pattern of the conductive wires 56 and 51 of the electrodes 46 and 41 between the side edges on the sides facing each other can be reduced, and can be caused by noise from the outside. Malfunctions of the touch panel sensor 30 can be effectively reduced. In addition, when the conductors 51 of the first electrode 46 or the second electrode 41 in one half region have a density distribution, the conductors 51 in the two half regions are arranged in a pattern that is translationally symmetric with each other. At each border side edge of the two half regions facing each other, there is a portion where the lead wire density suddenly changes between the two half regions, and this is a rapid change in light transmittance and reflectance. A boundary portion between the two half regions is easily visually recognized. On the other hand, in the present embodiment, the conductors 51 in the two half regions are arranged in a pattern that is mirror-image symmetric or rotationally symmetric with each other, so that a change in the conductor density between the two half regions is suppressed. This can effectively prevent the boundary between the two half-regions from being visually recognized.

[Third Embodiment]
FIG. 11A and FIG. 11B are plan views showing patterns of the conducting wires 56 and 51 of the electrodes 46 and 41 according to the third embodiment. About the whole structure of the display apparatus 10 with a touch position detection function and the touch panel sensor 30 in this Embodiment, Especially the whole structure of the display apparatus 10 with a touch position detection function and the touch panel sensor 30 demonstrated with reference to FIG. 1 and FIG. Since this is the same as in the first embodiment, description thereof is omitted.

  In the example shown in FIG. 11A and FIG. 11B, the first electrode 46 in one region R is 2 by a second straight line L2 passing through the center of the one region R and parallel to the second direction D2. Conductive wires 56 in two divided half regions are arranged in a pattern that is symmetrical (mirror symmetry or rotational symmetry), and the second electrode 41 in one region R is also the center of the one region R. The conductive wires 51 in two half regions divided by a second straight line L2 passing through the second direction D2 and parallel to the second direction D2 are arranged in a pattern that is symmetrical (mirror symmetry or rotational symmetry). In this case, the relative positional relationship between the first electrode 46 and the second electrode 41 in one region R is also symmetric (mirror symmetry or rotational symmetry) with respect to two half-regions divided by the second straight line L2. Therefore, the detection sensitivity of the touch position in one region R is also symmetric (mirror image symmetry or rotational symmetry) with respect to the two half regions divided by the second straight line L2. Thereby, the uniformity (uniformity) of the touch position detection sensitivity in the second direction D2 can be further improved.

  In the present embodiment, in the first electrode 46 and the second electrode 41, the conductive wires 56 in the two half regions are arranged in a pattern that is mirror-image symmetric or rotationally symmetric with each other. A difference (step) in signal level caused by the arrangement pattern of the conductive wires 56 and 51 of the electrodes 46 and 41 between the side edges on the sides facing each other can be reduced, and can be caused by noise from the outside. Malfunctions of the touch panel sensor 30 can be effectively reduced. In addition, when the conductors 51 of the first electrode 46 or the second electrode 41 in one half region have a density distribution, the conductors 51 in the two half regions are arranged in a pattern that is translationally symmetric with each other. At each border side edge of the two half regions facing each other, there is a portion where the lead wire density suddenly changes between the two half regions, and this is a rapid change in light transmittance and reflectance. A boundary portion between the two half regions is easily visually recognized. On the other hand, in the present embodiment, the conductors 51 in the two half regions are arranged in a pattern that is mirror-image symmetric or rotationally symmetric with each other, so that a change in the conductor density between the two half regions is suppressed. This can effectively prevent the boundary between the two half-regions from being visually recognized.

[Fourth Embodiment]
FIGS. 12A and 12B are plan views showing patterns of the conducting wires 56 and 51 of the electrodes 46 and 41 according to the fourth embodiment. About the whole structure of the display apparatus 10 with a touch position detection function and the touch panel sensor 30 in this Embodiment, Especially the whole structure of the display apparatus 10 with a touch position detection function and the touch panel sensor 30 demonstrated with reference to FIG. 1 and FIG. Since this is the same as in the first embodiment, description thereof is omitted.

  In the example shown in FIGS. 12A and 12B, the first electrode 46 in one region R passes through the center of the one region R and is in a plane parallel to the plate surface of the base material 32. Conductive wires 56 in two half-regions divided by a third straight line L3 inclined by 45 ° with respect to the first direction D1 are arranged in a pattern that is symmetrical (mirror symmetry or rotational symmetry), and Conductive wires 56 in two half-regions that are divided by a fourth straight line L4 that passes through the center of one region R and is orthogonal to the third straight line L3 in a plane parallel to the plate surface of the substrate 32. The second electrodes 41 in one region R are arranged in a pattern that is symmetrical to each other (mirror image symmetry or rotational symmetry), and the conductors 51 in two half regions divided by the third straight line L3 are mutually connected. Symmetric (mirror symmetry or rotational symmetry) Together are arranged in over emissions, they are arranged in a pattern conductor 51 of the fourth straight line L4 by two half-regions formed by the two minutes symmetrical (mirror symmetry or rotational symmetry) to each other. In this case, the relative positional relationship between the first electrode 46 and the second electrode 41 in one region R is divided by two half regions divided by the third straight line L3 and the fourth straight line L4. Since each of the two half-regions is symmetric (mirror symmetry or rotational symmetry), the detection sensitivity in one region R is also divided by the two half-regions divided by the third straight line L3 and 2 by the fourth straight line L4. Symmetry (mirror symmetry or rotational symmetry) is established with respect to each of the two divided half regions. Thereby, the in-plane uniformity (uniformity) of the touch position detection sensitivity can be further improved.

  In the present embodiment, in the first electrode 46 and the second electrode 41, the conductive wires 56 in the two half regions are arranged in a pattern that is mirror-image symmetric or rotationally symmetric with each other. A difference (step) in signal level caused by the arrangement pattern of the conductive wires 56 and 51 of the electrodes 46 and 41 between the side edges on the sides facing each other can be reduced, and can be caused by noise from the outside. Malfunctions of the touch panel sensor 30 can be effectively reduced. In addition, when the conductors 51 of the first electrode 46 or the second electrode 41 in one half region have a density distribution, the conductors 51 in the two half regions are arranged in a pattern that is translationally symmetric with each other. At each border side edge of the two half regions facing each other, there is a portion where the lead wire density suddenly changes between the two half regions, and this is a rapid change in light transmittance and reflectance. A boundary portion between the two half regions is easily visually recognized. On the other hand, in the present embodiment, the conductors 51 in the two half regions are arranged in a pattern that is mirror-image symmetric or rotationally symmetric with each other, so that a change in the conductor density between the two half regions is suppressed. This can effectively prevent the boundary between the two half-regions from being visually recognized.

[Fifth Embodiment]
About the whole structure of the display apparatus 10 with a touch position detection function and the touch panel sensor 30 in this Embodiment, Especially the whole structure of the display apparatus 10 with a touch position detection function and the touch panel sensor 30 demonstrated with reference to FIG. 1 and FIG. Since this is the same as in the first embodiment, description thereof is omitted.

  In the present embodiment, the touch panel sensor 30 is formed with a plurality of intersecting portions where the first electrode 46 and the second electrode 41 intersect in plan view, and the intersecting portions are arranged along the first direction D1. The first electrodes 46 are arranged along the second direction D2, and each first electrode 46 has a pitch of 1 / n (n is a natural number) of the arrangement pitch along the first direction D1 of the intersection. In the second direction, the conductors 56 in two regions adjacent to each other in the first direction D1 are arranged in a symmetric pattern with each other and are arranged in the first direction D1. Conductive wires 56 in two regions adjacent to D2 are arranged in a symmetrical pattern, and the shape of the opening 56a in each region is not uniform, and each second electrode 41 has a second crossing portion. 1 / m of the arrangement pitch along the direction D2 ( Has a plurality of regions arranged side by side along the second direction D2 at a pitch of a natural number), and the conductive wires 51 in two regions adjacent to each other in the first direction D1 are arranged in a symmetrical pattern. In addition, the conductors 51 in two regions adjacent to each other in the second direction D2 are arranged in a pattern that is symmetrical to each other, and the shape of the opening 51a in each region is not uniform. In this case, each first electrode 46 has a symmetrical pattern (unit pattern) repeatedly arranged at a pitch of 1 / n (n is a natural number) of the arrangement pitch along the first direction D1 of the intersection. Since the two electrodes 41 have a symmetrical pattern (unit pattern) repeatedly arranged at a pitch of 1 / m (m is a natural number) of the arrangement pitch along the second direction D2 of the intersecting portion, the ease of pattern design is effective. Can be improved. In the example shown in FIG. 3, n = 1, and in this case, the arrangement pitch along the first direction D1 of the intersection and the repetition pitch of the symmetrical pattern (unit pattern) in the conductive wire 56 of the first electrode 46 Are the same. In the example shown in FIG. 4, m = 1. In this case, the arrangement pitch along the second direction D2 of the intersecting portion and the repetition pitch of the symmetrical pattern (unit pattern) in the conductive wire 51 of the second electrode 41 Are the same. In addition, it is not restricted to this, n and m may be two or more natural numbers, respectively.

  Various modifications can be made to the above-described embodiment. Hereinafter, modified examples 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 the above embodiment, A duplicate description is omitted.

  For example, as shown in FIG. 13, a dummy pattern (dummy floater) 42 that is not electrically connected to any of the second electrode 41 and the second frame wiring 43 between two adjacent second electrodes 41. May be provided. FIG. 14 is an enlarged plan view showing a portion surrounded by an alternate long and short dash line denoted by C in FIG. As shown in FIG. 14, the dummy pattern 42 is a conductive wire 52 having a light shielding property and a conductive property, and includes a conductive wire 52 arranged in a mesh shape so that an opening 52 a is formed between the conductive wires 52. The shape of the opening 52a of the dummy pattern 42 is not uniform. Preferably, the aperture ratio of the dummy pattern 42 is the same as the aperture ratio of the second electrode 41. In this case, the light transmittance of the touch panel sensor 30 on the observer side of the base material 32 can be made substantially uniform over the entire area of the active area Aa1. Thereby, it is possible to prevent the luminance of the display device with a touch position detection function 10 from varying. Since the dummy pattern 42 does not contribute to capacitive coupling between the first electrode 46 and the second electrode 41, the conductive wires 52 of the dummy pattern 42 in one region R are arranged symmetrically with respect to the first direction D1. It is not necessary to arrange them symmetrically with respect to the second direction D2.

  In the above-described embodiment, the first electrode 46 functions as a drive electrode and the second electrode 41 functions as a detection electrode. However, the present invention is not limited to this, and the second electrode 41 is driven. While functioning as an electrode, the first electrode 46 may function as a detection electrode. That is, a drive signal may be applied to the second electrode 41, and this drive signal may be transmitted to the first electrode 46 via capacitive coupling between the second electrode 41 and the first electrode 46.

  In the above-described embodiment, both the first electrode 46 and the second electrode 41 are light-shielding and conductive conductors, and have a mesh shape so that openings are formed between the conductors. Although it was comprised from the arrange | positioned conducting wire, it is not limited to this, Either one of the 1st electrode 46 and the 2nd electrode 41 is a conducting wire which has light-shielding property and electroconductivity, Comprising: It opens between each conducting wire. It is comprised from the conducting wire arrange | positioned at mesh shape so that a part may be formed, and the other may be comprised from the transparent conductive layer which has translucency and electroconductivity. In this case, with respect to the one electrode composed of the conductive wire, the conductive wires in the two regions R adjacent to each other in the first direction D1 are arranged in a symmetric pattern with respect to the electrode in one region R. If the conductors in the two regions R adjacent in the second direction D2 are arranged in a symmetrical pattern with each other and the shape of the opening of the electrode in each region R is not uniform, the electricity of the other electrode Except for an increase in the resistance value, the same effects as those of the above-described embodiment can be obtained.

  In the above-described embodiment, the first electrode 46 is provided on the first surface 32 a of the base material 32 so as to extend in a strip shape in the first direction D <b> 1, and the second electrode 41 is the first electrode of the base material 32. Although it was provided on the second surface 32b opposite to the first surface 32a so as to extend in a strip shape in the second direction D2, it is not limited to this, and each of the first electrode and the second electrode has a rectangular shape or a rhombus shape. The unit electrodes having a shape are formed to be connected at the corners, and the unit electrodes of the first electrode and the unit electrodes of the second electrode may be alternately arranged in a lattice shape so as not to overlap each other. In this case, the first electrode and the second electrode may be provided on the same surface of the base material 32 or may be provided on the surfaces of the base material 32 facing each other.

  In the above, a plurality of embodiments and a plurality of modifications have been described, but naturally, the embodiments and the modifications can be appropriately combined and applied.

DESCRIPTION OF SYMBOLS 10 Display apparatus 15 with a touch position detection function Display apparatus 16 Display panel 16a Display surface 30 Touch panel sensor 32 Base material 32a 1st surface 32b 2nd surface 41 2nd electrode 42 Dummy pattern 43 2nd frame wiring 44 2nd terminal part 46 1st 1 electrode 48 1st frame wiring 49 1st terminal part 51 Conductor 51a Opening 51b Branch point 51c Boundary segment 52 Conductor 52a Opening 56 Conductor 56a Opening 56b Branching point 56c Boundary segment A1 Active area Aa1 Active area A2 Inactive Area Aa2 Inactive area D1 First direction D2 Second direction R Region L1 First straight line L2 Second straight line L3 Third straight line L4 Fourth straight line

Claims (8)

A mutual capacitive touch panel sensor,
A substrate;
A plurality of first electrodes provided on the substrate and extending in a first direction;
A plurality of second electrodes provided on the base material and extending in a second direction intersecting the first direction;
The first electrode is a conducting wire having light shielding properties and conductivity, and is composed of conducting wires arranged in a mesh shape so that an opening is formed between each conducting wire,
The second electrode is also a conductive wire having light shielding properties and electrical conductivity, and is composed of conductive wires arranged in a mesh shape so that an opening is formed between the conductive wires,
In the touch panel sensor, a plurality of regions are defined corresponding to each of the portions where capacitive coupling occurs between the first electrode and the second electrode, and the plurality of regions are arranged in the first direction. Arranged side by side and arranged side by side along the second direction,
The first electrodes are arranged in a pattern in which the conductive wires in two regions adjacent to each other in the first direction are symmetrical to each other, and the conductive wires in two regions adjacent to each other in the second direction are Arranged in a pattern that is symmetrical to each other, the shape of the opening in each region is not uniform,
The second electrodes are arranged in a pattern in which the conductive wires in the two regions adjacent in the first direction are symmetrical to each other, and the conductive wires in the two regions adjacent in the second direction are A touch panel sensor, which is arranged in a pattern symmetric to each other, and the shape of the opening in each region is not uniform. A mutual capacitive touch panel sensor,
A substrate;
A plurality of first electrodes provided on the substrate and extending in a first direction;
A plurality of second electrodes provided on the base material and extending in a second direction intersecting the first direction;
The first electrode is a conducting wire having light shielding properties and conductivity, and is composed of conducting wires arranged in a mesh shape so that an opening is formed between each conducting wire,
The second electrode is also a conductive wire having light shielding properties and electrical conductivity, and is composed of conductive wires arranged in a mesh shape so that an opening is formed between the conductive wires,
In the touch panel sensor, a plurality of regions are defined corresponding to each of the portions where capacitive coupling occurs between the first electrode and the second electrode, and the plurality of regions are arranged in the first direction. Arranged side by side and arranged side by side along the second direction,
The first electrode in one region has a pattern in which the conducting wires in two half regions formed by being bisected by a first straight line passing through the center of the one region and parallel to the first direction are symmetrical to each other. Arranged, the shape of the opening in each half region is not uniform,
The second electrode in one region has a pattern in which the conductive wires in two half regions formed by being bisected by a first straight line passing through the center of the one region and parallel to the first direction are symmetrical to each other. A touch panel sensor, wherein the touch panel sensor is arranged and the shape of the opening in each half region is not uniform. A mutual capacitive touch panel sensor,
A substrate;
A plurality of first electrodes provided on the substrate and extending in a first direction;
A plurality of second electrodes provided on the base material and extending in a second direction intersecting the first direction;
The first electrode is a conducting wire having light shielding properties and conductivity, and is composed of conducting wires arranged in a mesh shape so that an opening is formed between each conducting wire,
The second electrode is also a conductive wire having light shielding properties and electrical conductivity, and is composed of conductive wires arranged in a mesh shape so that an opening is formed between the conductive wires,
In the touch panel sensor, a plurality of regions are defined corresponding to each of the portions where capacitive coupling occurs between the first electrode and the second electrode, and the plurality of regions are arranged in the first direction. Arranged side by side and arranged side by side along the second direction,
The first electrode in one region has a pattern in which the conductive wires in two half regions formed by being bisected by a second straight line passing through the center of the one region and parallel to the second direction are symmetrical to each other. Arranged, the shape of the opening in each half region is not uniform,
The second electrode in one region has a pattern in which the conductive wires in two half regions formed by being bisected by a second straight line passing through the center of the one region and parallel to the second direction are symmetrical to each other. A touch panel sensor, wherein the touch panel sensor is arranged and the shape of the opening in each half region is not uniform. A mutual capacitive touch panel sensor,
A substrate;
A plurality of first electrodes provided on the substrate and extending in a first direction;
A plurality of second electrodes provided on the base material and extending in a second direction orthogonal to the first direction;
The first electrode is a conducting wire having light shielding properties and conductivity, and is composed of conducting wires arranged in a mesh shape so that an opening is formed between each conducting wire,
The second electrode is also a conductive wire having light shielding properties and electrical conductivity, and is composed of conductive wires arranged in a mesh shape so that an opening is formed between the conductive wires,
In the touch panel sensor, a plurality of regions are defined corresponding to each of the portions where capacitive coupling occurs between the first electrode and the second electrode, and the plurality of regions are arranged in the first direction. Arranged side by side and arranged side by side along the second direction,
The first electrode in one region is bisected by a third straight line that passes through the center of the one region and is inclined by 45 ° with respect to the first direction in a plane parallel to the plate surface of the substrate. The conductors in the two half-regions are arranged in a pattern that is symmetrical to each other, and orthogonal to the third straight line in a plane that passes through the center of the one region and is parallel to the plate surface of the base material. The conductive wires in the two half regions divided by the fourth straight line are arranged in a pattern that is symmetrical to each other, and the shape of the opening in each half region is not uniform,
The second electrode in one region is bisected by a third straight line that passes through the center of the one region and is inclined by 45 ° with respect to the first direction in a plane parallel to the plate surface of the substrate. The conductors in the two half-regions are arranged in a pattern that is symmetrical to each other, and orthogonal to the third straight line in a plane that passes through the center of the one region and is parallel to the plate surface of the base material. The conductive wires in the two half areas divided by the fourth straight line are arranged in a symmetrical pattern, and the shape of the opening in each half area is not uniform. Sensor. A mutual capacitive touch panel sensor,
A substrate;
A plurality of first electrodes provided on the substrate and extending in a first direction;
A plurality of second electrodes provided on the base material and extending in a second direction intersecting the first direction;
The first electrode is a conducting wire having light shielding properties and conductivity, and is composed of conducting wires arranged in a mesh shape so that an opening is formed between each conducting wire,
The second electrode is also a conductive wire having light shielding properties and electrical conductivity, and is composed of conductive wires arranged in a mesh shape so that an opening is formed between the conductive wires,
The touch panel sensor has a plurality of intersections where the first electrode and the second electrode intersect in plan view, and the intersections are arranged side by side along the first direction. , Arranged side by side along the second direction,
Each first electrode has a plurality of regions arranged side by side along the first direction at a pitch of 1 / n (n is a natural number) of the arrangement pitch along the first direction of the intersection, The conductive wires in the two regions adjacent to each other in the first direction are arranged in a symmetric pattern, and the conductive wires in the two regions adjacent in the second direction are symmetric to each other. Arranged, the shape of the opening in each region is not uniform,
Each second electrode has a plurality of regions arranged side by side along the second direction at a pitch of 1 / m (m is a natural number) of the arrangement pitch along the second direction of the intersection, The conductive wires in the two regions adjacent to each other in the first direction are arranged in a symmetric pattern, and the conductive wires in the two regions adjacent in the second direction are symmetric to each other. A touch panel sensor, wherein the touch panel sensor is arranged and the shape of the opening in each region is not uniform. The lead wire of the first electrode in one region is formed from a plurality of boundary segments extending between two branch points and defining the opening of the first electrode, and is a boundary line extending from one branch point The average number of minutes is 3.0 or more and less than 4.0,
The lead wire of the second electrode in one region is formed from a plurality of boundary line segments that extend between two branch points to define the opening of the second electrode, and extends from one branch point. The touch panel sensor according to any one of claims 1 to 5, wherein the average of the number of minutes is 3.0 or more and less than 4.0. The first electrode is provided on the first surface of the base material so as to extend in a strip shape in the first direction,
The second electrode is provided on the second surface facing the first surface of the base material so as to extend in a strip shape in the second direction,
The touch panel according to claim 1, wherein the plurality of regions are defined corresponding to each of the portions where the first electrode and the second electrode intersect in plan view. Sensor.   A display device with a touch position detection function, comprising the touch panel sensor according to claim 1.

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