JP2016038753A - Touch sensor electrode, touch panel, and display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide: a touch sensor electrode capable of suppressing an increase in the ohmic value of an electrode composed of a plurality of electrode wires, caused by an increase in the ohmic value of a part of the electrode wires; a touch panel; and a display device.SOLUTION: A plurality of line segments composing a drive electrode 31DP and a plurality of line segments composing a sensing electrode 33SP are configured not to overlap on each other along a first line direction DL1 and a second line direction DL2. A plurality of drive main lines 31ML includes, as one drive main line group 31G, the plurality of drive main lines 31ML passing through a plurality of capacity detection parts ND adjacent to each other in a first electrode direction D1. A plurality of drive sub-lines 31SL comprise, for each of the capacity detection parts ND, the plurality of drive sub-lines 31SL connecting the plurality of drive main lines 31ML composing the drive main line group 31G.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a touch sensor electrode, a touch panel, and a display device, each of which includes a plurality of electrode lines.

  Touch panels are widely used as input devices for electronic devices. The touch panel includes a transparent dielectric layer having a first surface and a second surface, and a plurality of first strip electrodes having a strip shape extending along the X direction are formed on the first surface of the transparent dielectric layer. A plurality of second strip electrodes having a strip shape extending along the Y direction orthogonal to the X direction are positioned on the second surface of the transparent dielectric layer. And the change of the electrostatic capacitance between each of the 1st 1st strip | belt-shaped electrode and each of several 2nd strip | belt-shaped electrodes is detected for every 1st strip | belt-shaped electrode, and the position of the finger | toe on the operation surface of a touch panel is detected. A metal such as silver or copper is used as a material for forming the first strip electrode or the second strip electrode in order to lower the resistance value of each strip electrode (see, for example, Patent Document 1).

JP2013-156725A

  Incidentally, each of the plurality of strip electrodes constituting the touch panel is required to have light transmissivity for outputting an image on the operation surface of the touch panel, in addition to conductivity for detecting a change in capacitance. Each of the plurality of strip-like electrodes is configured as a set of a plurality of electrode lines arranged at intervals from each other, and expresses the above-described light transmittance in the gap between the electrode lines adjacent to each other.

  On the other hand, when each of the plurality of electrode lines has a simple linear shape that connects the terminals of the strip electrode, each of the plurality of electrode lines individually carries conduction between the terminals. In the configuration having such an electrode line, for example, even if the resistance value increases in a small part of one electrode line, the resistance value of the strip electrode is assumed to increase in the resistance value in all of the one electrode line. The value increases. In recent years, where it is desired to suppress the visibility of the electrode for the touch sensor, since the thinning of the electrode wire is in progress, it is particularly required to suppress the increase in the resistance value of the strip electrode as described above. ing.

  The present invention provides an electrode for a touch sensor, a touch panel, and a display device capable of suppressing an increase in resistance value of an electrode composed of a plurality of electrode lines due to an increase in resistance value in a part of the electrode line. For the purpose.

  An electrode for a touch sensor for solving the above problem has a strip shape extending along a first electrode direction which is one direction, and is in a second electrode direction which is a direction intersecting the first electrode direction. A plurality of first electrodes arranged along the first electrode direction, and a strip shape extending along the second electrode direction, and arranged with a gap along the first electrode direction. And a plurality of second electrodes that three-dimensionally intersect with each of the electrodes. Each of the plurality of first electrodes has a linear shape extending along a first line direction that is one direction, and a plurality of first segments that are line segments that are interrupted between the first electrodes adjacent to each other. One main line and a plurality of first sub-lines that are linear segments extending along a second line direction that is a direction intersecting the first line direction. Each of the plurality of second electrodes has a plurality of second main lines that have a linear shape extending along the second line direction and are line segments that are interrupted between the second electrodes adjacent to each other. And a plurality of second sub-lines that are line segments having a linear shape extending along the first line direction. Then, in a plan view facing a plane including the plurality of second electrodes, the plurality of line segments that constitute the first electrode and the plurality of line segments that constitute the second electrode have a rectangular shape. One lattice pattern, which is a repetition of the unit lattice, is formed, and is configured not to overlap with each other along the first line direction and the second line direction. Further, in a plan view facing a plane including the plurality of second electrodes, a portion overlapping each other in the first electrode and the second electrode is a capacitance detection unit, and the plurality of first main lines are the first A plurality of the first main lines common to a plurality of the capacitance detection units adjacent to each other in one electrode direction are included as one main line group, and the plurality of first sub lines are the plurality of the first lines constituting the main line group. A plurality of the first sub-lines for connecting one main line in parallel are included for each one of the capacitance detection units.

  A touch panel for solving the above problems includes a plurality of first electrodes, a plurality of second electrodes, and a transparent dielectric layer sandwiched between the plurality of first electrodes and the plurality of second electrodes. The touch sensor electrode described above, a cover layer that covers the touch sensor electrode, and a peripheral circuit that measures capacitance between the first electrode and the second electrode are provided.

  A display device for solving the above-described problems includes a display panel that displays information, the above-described touch panel that transmits the information displayed on the display panel, and a drive circuit that drives the touch panel.

  According to the touch sensor electrode, the touch panel, and the display device, each of the plurality of first main lines constituting the main line group is a line segment common to the plurality of capacitance detection units adjacent to each other in the first electrode direction. is there. The plurality of first sub-lines includes a line segment that connects the plurality of first main lines constituting the main line group in parallel, and the line segment that connects the plurality of first main lines in parallel is detected as one capacitance. Includes more than one per part. That is, each of the plurality of capacitance detection units arranged along the first electrode direction includes a plurality of parallel circuits in which a part of each of the plurality of first main lines is connected in parallel by the first sub-line, and the first A plurality of parallel circuits adjacent to each other in the electrode direction are connected in series through sharing of the first sub-line. Therefore, even if the resistance value increases in a specific part of the first main line, a transmission path that bypasses the specific part is configured in the first electrode, and the resistance value increases in parallel circuits other than the specific parallel circuit. do not do. As a result, the resistance value in the electrode composed of the plurality of electrode lines is compared with the configuration in which the plurality of electrode lines constituting the first electrode are composed only of the line segment having the linear shape extending along the first electrode direction. Can be prevented from increasing due to an increase in resistance in a part of the electrode wire.

  In the touch sensor electrode, the main line group is a first main line group. In a plan view facing a plane including the plurality of second electrodes, the plurality of second main lines are shared by the plurality of capacitance detection units adjacent to each other in the second electrode direction. A main line is included as one second main line group, and a plurality of the second sub lines are connected to the plurality of second main lines constituting the second main line group in parallel. It is preferable to include a plurality of parts per part.

  According to the touch sensor electrode, each of the plurality of second main lines constituting the second main line group is a line segment common to the plurality of capacitance detection units adjacent to each other in the second electrode direction. The plurality of second sub-lines include a line segment that connects the plurality of second main lines constituting the second main line group in parallel, and the line segment that connects the plurality of second main lines in parallel is one A plurality of capacity detectors are included. Therefore, as in the case of the first electrode described above, the second electrode has a plurality of electrode lines constituting the second electrode, as compared with a structure consisting of only a line segment having a linear shape extending along the second electrode direction. In this case, it is possible to suppress an increase in the resistance value of the electrode composed of a plurality of electrode lines due to an increase in the resistance value in a part of the electrode lines.

  In the touch sensor electrode, the second electrode includes a plurality of the second main line groups arranged with a gap along the first line direction. Then, in a plan view opposite to the plane including the plurality of second electrodes, at least one of the first sub-lines connecting the plurality of first main lines in parallel is the second main line group adjacent to each other. It is preferable to have a linear shape that is located in the gap and extends over the entire second line direction in the capacitance detection unit.

  According to the touch sensor electrode, the line segment extending in the second line direction in the capacitance detection unit includes a plurality of second main line groups and a second main line group adjacent to each other. 1 subline is included. Here, as long as the position of the first electrode and the position of the second electrode are different from each other in the depth direction in plan view, the color of the first electrode and the color of the second electrode are different from each other. There are many things. In this regard, with the above-described configuration, the first sub-line configuring the first electrode and the second main line group configuring the second electrode are alternately repeated along the first line direction. Even if the color of the first electrode and the color of the second electrode are different from each other, it is possible to suppress the first electrode and the second electrode from being visually recognized as separate structures due to the difference in these colors. .

  In the touch sensor electrode, the first electrode includes a plurality of first main line groups arranged with a gap along the second line direction. Then, in a plan view opposite to the plane including the plurality of second electrodes, at least one of the second sub-lines connecting the plurality of second main lines in parallel is the first main line group adjacent to each other. It is preferable to have a linear shape that is located in the gap and extends over the entire first line direction in the capacitance detection unit.

  According to the touch sensor electrode, the line segment extending in the first line direction in the capacitance detection unit includes a plurality of first main line groups and a first main line group adjacent to each other. 2 sublines are included. Here, as long as the position of the first electrode and the position of the second electrode are different from each other in the depth direction in plan view, the color of the first electrode and the color of the second electrode are different from each other. There are many things. In this respect, since the first main line group constituting the first electrode and the second sub-line constituting the second electrode are alternately repeated along the second line direction in the above-described configuration, Even if the color of one electrode and the color of the second electrode are different from each other, the first electrode and the second electrode are prevented from being visually recognized as separate structures due to the difference in these colors.

  In the touch sensor electrode, the number of the first main lines constituting the first main line group is more than the number of the first sub-lines connecting the plurality of first main lines constituting the first main line group in parallel. It is also preferable that there are many.

  According to the touch sensor electrode, the number of the first main lines constituting the first main line group and the number of the first sub-lines connecting the first main lines in parallel are equal to each other. The number of intersections between the main line and the first sub-line is small in the first main line group. Here, the angle at the intersection where the first main line and the second main line intersect three-dimensionally usually has an angle formed from the first line direction and the second line direction. On the other hand, when the first main line and the first sub line are patterned, the corners at the intersection of the first main line and the first sub line are often formed rounded. Therefore, the area of the intersection between the first main line and the first sub-line tends to be larger than the intersection where the first main line and the second main line intersect three-dimensionally. In this respect, since the increase in the number of intersections between the first main line and the first sub-line can be suppressed with the above-described configuration, a decrease in the aperture ratio due to such an intersection can also be suppressed.

  In the touch sensor electrode, the number of the second main lines constituting the second main line group is greater than the number of the second sub lines connecting the plurality of second main lines constituting the second main line group in parallel. It is also preferable that there are many.

  According to the touch sensor electrode, the second main line constituting the second main line group and the second sub line connecting the second main lines in parallel have the same number as the second sub line. The number of intersections between the main line and the second sub-line is small in the second main line group. Here, as described above, the angle at the intersection where the first main line and the second main line intersect three-dimensionally usually has an angle formed from the first line direction and the second line direction. On the other hand, when the second main line and the second sub line are patterned, the corners at the intersection of the second main line and the second sub line are often formed rounded. Therefore, the area of the intersection between the second main line and the second sub-line tends to be larger than the intersection where the first main line and the second main line intersect three-dimensionally. In this respect, with the above-described configuration, an increase in the number of intersections between the second main line and the second sub-line can be suppressed, so that a decrease in the aperture ratio due to such an intersection can also be suppressed.

  In the touch sensor electrode, the first electrode direction and the second electrode direction are directions orthogonal to each other, and the first line direction and the second line direction are directions orthogonal to each other. The first line direction is preferably a direction intersecting the first electrode direction and the second electrode direction.

  According to the touch sensor electrode, the first electrode has periodicity along the second electrode direction, and the second electrode has periodicity along the first electrode direction. Each of the main line, the first sub line, the second main line, and the second sub line has a linear shape extending along the first electrode direction and the direction intersecting the second electrode direction. Here, in a device on which a touch sensor electrode is mounted, usually, the direction in which operation target elements that are elements to be operated on the touch panel are arranged, such as pixels and black matrix, and the capacitance in the touch sensor electrode. This is consistent with the direction in which the detectors are arranged. In this respect, with the above-described configuration, interference between the periodicity of the first main line and the first sub-line and the periodicity of the operation target element is suppressed, and the second main line and the second double line have. Interference between the periodicity and the periodicity of the operation target element is suppressed. Therefore, in a device on which the touch sensor electrode is mounted, moire caused by the touch sensor electrode is suppressed.

  According to the present invention, it is possible to suppress an increase in the resistance value of an electrode composed of a plurality of electrode lines due to an increase in the resistance value in a part of the electrode lines.

It is a top view which shows the planar structure of the display apparatus in 1st Embodiment which actualized this invention, Comprising: It is a figure cut out and shown in order that a part of mutually different component overlaps. It is sectional drawing which shows the cross-section of the display apparatus in 1st Embodiment. It is a block diagram for demonstrating the electrical structure of the touchscreen in 1st Embodiment. It is a fragmentary top view which shows the planar structure of a part of drive electrode in 1st Embodiment, Comprising: It is a figure which shows the part which comprises four capacity | capacitance detection parts in a drive electrode. It is a fragmentary top view which shows the planar structure of a part of sensing electrode in 1st Embodiment, Comprising: It is a figure which shows the part which comprises four capacity | capacitance detection parts in a sensing electrode. It is a top view which shows the planar structure of the drive electrode and sensing electrode in 1st Embodiment, Comprising: It is a figure which shows the relationship between the position of a drive electrode, and the position of a sensing electrode. It is a fragmentary top view which shows the planar structure of a part of drive electrode in 2nd Embodiment, Comprising: It is a figure which shows the part which comprises four capacity | capacitance detection parts in a drive electrode. FIG. 9 is an enlarged plan view showing a part of a planar structure of a drive electrode in a second embodiment in an enlarged manner, and is a diagram showing a part constituting two capacitance detection units in the drive electrode. It is a fragmentary top view which shows the planar structure of a part of sensing electrode in 2nd Embodiment, Comprising: It is a figure which shows the part which comprises four capacity | capacitance detection parts in a sensing electrode. It is an enlarged plan view which expands and shows a part of planar structure of the sensing electrode in 2nd Embodiment, Comprising: It is a figure which shows the part which comprises two capacity | capacitance detection parts in a sensing electrode. It is sectional drawing which shows the cross-section of the display apparatus in a 1st modification. It is sectional drawing which shows the cross-section of the display apparatus in a 2nd modification.

[First Embodiment]
A touch sensor electrode, a touch panel, and a display device according to the first embodiment will be described with reference to FIGS. Below, the structure of a display apparatus, the electrical structure of a touch panel, the structure of a drive electrode, and the structure of a sensing electrode are demonstrated.

[Plane structure of display device]
The configuration of the display device will be described with reference to FIG. In FIG. 1, the black matrix, the drive electrode, and the sensing electrode are exaggerated for the convenience of describing the configuration of the black matrix, the drive electrode, and the sensing electrode included in the display device. Moreover, the drive electrode wire which comprises a drive electrode, and the sensing electrode wire which comprises a sensing electrode are typically shown.

  As shown in FIG. 1, the display device is a laminated body in which, for example, a display panel 10 that is a liquid crystal panel and a touch panel 20 are bonded together by one transparent adhesive layer, and a drive circuit for driving the touch panel 20. It has.

  A display surface 10S formed in a rectangular shape is partitioned on the surface of the display panel 10, and information such as an image based on image data from the outside is displayed on the display surface 10S. Note that the transparent adhesive layer may be omitted as long as the relative position between the display panel 10 and the touch panel 20 is fixed by another configuration such as a housing.

  The display panel 10 includes a color filter layer 15, and a black matrix 15a in the color filter layer 15 includes a first electrode direction D1 that is one direction and a second electrode direction D2 that is a direction orthogonal to the first electrode direction D1. And a lattice shape composed of a plurality of unit lattices having a rectangular shape arranged along the line. One pixel 15P is composed of three unit cells that are continuous along the second electrode direction D2, and each of the plurality of pixels 15P is arranged along the first electrode direction D1 and the second electrode direction D2. Yes.

  Each of the plurality of pixels 15P includes a red coloring layer 15R for displaying red, a green coloring layer 15G for displaying green, and a blue coloring layer 15B for displaying blue. In the color filter layer 15, for example, each of the plurality of red coloring layers 15R, the plurality of green coloring layers 15G, and the plurality of blue coloring layers 15B includes a red coloring layer 15R and a green coloring along the second electrode direction D2. The layer 15G and the blue colored layer 15B are repeatedly arranged in this order.

  One red colored layer 15R, one green colored layer 15G, and one blue colored layer 15B constitute one pixel 15P, and the plurality of pixels 15P includes the red colored layer 15R, green in the second electrode direction D2. The colored layers 15G and the blue colored layer 15B are arranged along the second electrode direction D2 while maintaining the order of arrangement.

  The width along the first electrode direction D1 in the pixel 15P is the first pixel width WP1, the width along the second electrode direction D2 in the pixel 15P is the second pixel width WP2, and each of the colored layers 15R, 15G, and 15B. The width along the second electrode direction D2 in FIG. 3 is the third pixel width WP3. Each of the first pixel width WP1, the second pixel width WP2, and the third pixel width WP3 is set to a value according to the resolution required for the display device.

  The display panel 10 is an EL panel that outputs colored light, and includes a red pixel that outputs red light, a green pixel that outputs green light, and a blue pixel that outputs blue light. If present, the above-described color filter layer 15 may be omitted. At this time, the boundary portion between adjacent pixels in the EL panel functions as a black matrix.

  The touch panel 20 is a capacitive touch panel, and is a laminated body in which a touch sensor electrode 21 and a cover layer 22 are bonded together by a transparent adhesive layer 23, and transmits light that transmits information displayed on the display panel 10. It has sex. The cover layer 22 is formed of a glass substrate, a resin film, or the like, and the surface of the cover layer 22 opposite to the transparent adhesive layer 23 is the surface of the touch panel 20 and functions as the operation surface 20S. The transparent adhesive layer 23 has a light-transmitting property that transmits an image displayed on the display surface 10S. For the transparent adhesive layer 23, for example, a polyether adhesive or an acrylic adhesive is used.

  The transparent substrate 31 constituting the touch sensor electrode 21 is superposed on the entire display surface 10S formed on the display panel 10, and has a light transmission property that transmits information such as an image displayed on the display surface 10S. Yes. The transparent substrate 31 may be composed of a base material such as a transparent glass substrate or a transparent resin film, for example, and may be a single layer structure composed of one base material, or two or more base materials may be stacked. It may be a multilayer structure.

  The surface of the transparent substrate 31 opposite to the display panel 10 is set as a drive electrode surface 31S. In the drive electrode surface 31S of the transparent substrate 31, each of the plurality of drive electrodes 31DP has a band shape extending along the first electrode direction D1, which is one direction, and is orthogonal to the first electrode direction D1. They are arranged at intervals along the two-electrode direction D2. The drive electrode 31DP is an example of a first electrode.

  Each drive electrode 31DP is a set of a plurality of drive electrode lines, and each of the plurality of drive electrode lines includes a drive main line that is an example of a first main line and a drive sub line that is an example of a first sub line. . A metal film such as copper or aluminum is used as a material for forming each drive electrode 31DP. Each of the plurality of drive electrodes 31DP is individually connected to the selection circuit via the drive pad 31P, and is selected by the selection circuit by receiving a drive signal output from the selection circuit.

  A plurality of drive electrodes 31DP and a portion of the drive electrode surface 31S where the drive electrode 31DP is not located are bonded to the transparent dielectric substrate 33 by one transparent adhesive layer 32. The transparent adhesive layer 32 has a light transmission property that transmits information such as an image displayed on the display surface 10S, and bonds the drive electrode surface 31S, the plurality of drive electrodes 31DP, and the transparent dielectric substrate 33 to each other. To do. For the transparent adhesive layer 32, for example, a polyether adhesive or an acrylic adhesive is used. The transparent dielectric substrate 33 is an example of a transparent dielectric layer, and a plurality of drive electrodes 31DP are arranged on the back surface of the transparent dielectric substrate 33, which is the surface facing the transparent substrate 31.

  For example, the transparent dielectric substrate 33 may be formed of a base material such as a transparent resin film such as polyethylene terephthalate or a transparent glass substrate, and may have a single-layer structure including a single base material. A multilayer structure in which the above base materials are stacked may be used. The transparent dielectric substrate 33 has optical transparency that transmits information such as an image displayed on the display surface 10S, and a relative dielectric constant suitable for detecting capacitance between electrodes. The transparent dielectric substrate 33 is an example of a transparent dielectric layer.

  The surface of the transparent dielectric substrate 33 opposite to the transparent adhesive layer 32 is set as a sensing electrode surface 33S, and each of the plurality of sensing electrodes 33SP is placed on the sensing electrode surface 33S of the transparent dielectric substrate 33. In addition, it has a strip shape extending along the second electrode direction D2, and is arranged with a gap along the first electrode direction D1 orthogonal to the second electrode direction D2. The sensing electrode 33SP is an example of a second electrode.

  Each sensing electrode 33SP is a set of a plurality of sensing electrode lines, and each of the plurality of sensing electrode lines includes a sensing main line that is an example of a second main line and a sensing subline that is an example of a second subline. . A metal film such as copper or aluminum is used as a material for forming each sensing electrode 33SP. Each of the plurality of sensing electrodes 33SP is individually connected to the detection circuit via the sensing pad 33P, and the current value is measured by the detection circuit.

  The plurality of sensing electrodes 33SP and the portion where the sensing electrode 33SP is not located on the sensing electrode surface 33S are bonded to the cover layer 22 by the transparent adhesive layer 23 described above.

  In a plan view opposite to a plane including the plurality of sensing electrodes 33SP, a portion that overlaps the drive electrode 31DP and the sensing electrode 33SP is a capacitance detection unit ND having a quadrangular shape indicated by a two-dot chain line in FIG. is there. One capacitance detection unit ND is a portion where one drive electrode 31DP and one sensing electrode 33SP intersect three-dimensionally, and detects a position touched by a user's finger or the like on the touch panel 20. The smallest unit possible.

[Cross-sectional structure of display device]
As shown in FIG. 2, the transparent substrate 31, the drive electrode 31DP, the transparent adhesive layer 32, the transparent dielectric substrate 33, and the sensing electrode 33SP are sequentially arranged from the components close to the display panel 10 among the components constituting the touch panel 20. The transparent adhesive layer 23 and the cover layer 22 are located. Among these, the transparent dielectric substrate 33 is sandwiched between a plurality of drive electrodes 31DP and a plurality of sensing electrodes 33SP. The touch sensor electrode 21, the selection circuit, and the detection circuit constitute an example of a touch sensor.

  The transparent adhesive layer 32 covers the periphery of each drive electrode line constituting the drive electrode 31DP and fills the space between the drive electrode lines adjacent to each other, so that the gap between the drive electrode 31DP and the transparent dielectric substrate 33 is reached. Is located. The transparent adhesive layer 23 covers the periphery of each sensing electrode line constituting the sensing electrode 33SP and fills between the sensing electrode lines adjacent to each other, and is positioned between the sensing electrode 33SP and the cover layer 22. doing. In these components, at least one of the transparent adhesive layer 23 and the transparent substrate 31 may be omitted.

  In addition, a plurality of components constituting the display panel 10 are arranged in the following order from the components far from the touch panel 20 among the components constituting the display panel 10. That is, the lower polarizing plate 11, the thin film transistor (hereinafter, TFT) substrate 12, the TFT layer 13, the liquid crystal layer 14, the color filter layer 15, the color filter substrate 16, and the upper polarizing plate 17 are arranged in order from the components far from the touch panel 20. positioned. Among these, in the TFT layer 13, pixel electrodes constituting subpixels are located in a matrix. The black matrix 15a in the color filter layer 15 defines a plurality of regions having a rectangular shape facing each of the sub-pixels, and white light is red, green, and blue in each region defined by the black matrix 15a. The above-described colored layer that changes to any one of the colors is located.

  In the configuration in which the transparent adhesive layer 23 is omitted, the surface of the cover layer 22 that faces the transparent dielectric substrate 33 is set as the sensing electrode surface 33S, and is formed on the sensing electrode surface 33S. A plurality of sensing electrodes 33SP may be formed by patterning a thin film.

  In manufacturing the touch panel 20, a method in which the touch sensor electrode 21 and the cover layer 22 are bonded together by the transparent adhesive layer 23 may be employed. As another example different from such a manufacturing method, The manufacturing method may be adopted. That is, a thin film layer made of a conductive metal such as copper is formed directly or through an underlayer on the cover layer 22 such as a resin film, and the sensing electrode 33SP has a pattern shape on the thin film layer. A resist layer is formed. Next, the thin film layer is processed into a plurality of sensing electrodes 33SP by a wet etching method using ferric chloride or the like, and a first film is obtained. Similarly to the sensing electrode 33SP, a thin film layer formed on another resin film is processed into a plurality of drive electrodes 31DP, and a second film is obtained. And a 1st film and a 2nd film are affixed with a transparent adhesive layer with respect to the transparent dielectric substrate 33 so that the transparent dielectric substrate 33 may be pinched | interposed.

[Electrical configuration of touch panel]
The electrical configuration of the touch panel 20 will be described with reference to FIG. Hereinafter, as an example of the capacitive touch panel 20, an electrical configuration of the mutual capacitive touch panel 20 will be described.

  As shown in FIG. 3, the touch panel 20 includes a selection circuit 34, a detection circuit 35, and a control unit 36. The selection circuit 34 is connected to the plurality of drive electrodes 31DP, the detection circuit 35 is connected to the plurality of sensing electrodes 33SP, and the control unit 36 is connected to the selection circuit 34 and the detection circuit 35.

  The control unit 36 generates and outputs a start timing signal for causing the selection circuit 34 to start generating a drive signal for each drive electrode 31DP. The control unit 36 generates and outputs a scan timing signal for causing the selection circuit 34 to sequentially scan the target to which the drive signal is supplied from the first drive electrode 31DP toward the nth drive electrode 31DP.

  The control unit 36 generates and outputs a start timing signal for causing the detection circuit 35 to start detecting the current flowing through each sensing electrode 33SP. The control unit 36 generates and outputs a scanning timing signal for causing the detection circuit 35 to sequentially scan the detection target from the first sensing electrode 33SP toward the nth sensing electrode 33SP.

  The selection circuit 34 starts generating a drive signal based on the start timing signal output from the control unit 36, and sets the output destination of the drive signal to the first drive electrode based on the scanning timing signal output from the control unit 36. Scanning from 31DP1 toward the nth drive electrode 31DPn.

  The detection circuit 35 includes a signal acquisition unit 35a and a signal processing unit 35b. Based on the start timing signal output from the control unit 36, the signal acquisition unit 35a starts acquiring a current signal that is an analog signal generated in each sensing electrode 33SP. Then, the signal acquisition unit 35a scans the current signal acquisition source from the first sensing electrode 33SP1 to the nth sensing electrode 33SPn based on the scanning timing signal output from the control unit 36.

  The signal processing unit 35b processes each current signal acquired by the signal acquisition unit 35a, generates a voltage signal that is a digital value, and outputs the generated voltage signal to the control unit 36. As described above, the selection circuit 34 and the detection circuit 35 generate the voltage signal from the current signal that changes in accordance with the change in capacitance, thereby changing the capacitance between the drive electrode 31DP and the sensing electrode 33SP. Measure. The selection circuit 34 and the detection circuit 35 are examples of peripheral circuits.

  The control unit 36 detects a position touched by a user's finger or the like on the touch panel 20 based on the voltage signal output from the signal processing unit 35b. The touch panel 20 is not limited to the above-described mutual capacitive touch panel 20, and may be a self capacitive touch panel.

[Configuration of Drive Electrode 31DP]
The configuration of the drive electrode will be described with reference to FIG. In FIG. 4, for convenience of explaining the arrangement of the plurality of drive electrode lines constituting the drive electrode 31DP, the portion constituting the four capacitance detection units ND in the two drive electrodes 31DP is shown enlarged, and the drive The line widths of the electrode lines are exaggerated.
As shown in FIG. 4, each of the plurality of drive electrodes 31DP includes a plurality of drive main lines 31ML and a plurality of drive sub-lines 31SL.

  Each of the plurality of drive main lines 31ML has a linear shape extending along the first line direction DL1, which is one direction, and is a line segment that is interrupted between the drive electrodes 31DP adjacent to each other. In the plurality of drive main lines 31ML, portions where the drive electrodes 31DP are adjacent to each other are surrounded by broken-line circles in FIG. 4 and are arranged along the first electrode direction D1.

  The plurality of drive main lines 31ML include a plurality of drive main lines 31ML common to two capacitance detection units ND adjacent to each other in the first electrode direction D1, as one drive main line group 31G. FIG. 4 shows an example in which one drive main line group 31G is composed of five drive main lines 31ML, and two capacitance detectors ND adjacent to each other in the first electrode direction D1 have two drive main line groups 31G. ing.

  The five drive main lines 31ML constituting one drive main line group 31G are arranged along the second line direction DL2 with a main line interval WM along the second line direction DL2. The two drive main line groups 31G adjacent to each other in the second line direction DL2 are arranged along the second line direction DL2 with an interval twice the main line interval WM along the second line direction DL2.

  The plurality of drive sub-lines 31SL are linear segments extending along the second line direction DL2 and interrupted between the drive electrodes 31DP adjacent to each other. In the plurality of drive sub-lines 31SL, portions where the drive electrodes 31DP are adjacent to each other are surrounded by broken-line circles in FIG. 4 and are arranged along the first electrode direction D1. The plurality of drive sub-lines 31SL are arranged along the first line direction DL1 with a sub-line interval WS along the first line direction DL1. The sub-line interval WS, which is the pitch at which the drive sub-line 31SL is formed, is set sufficiently larger than the main line interval WM, and is 6 times the main line interval WM in FIG.

  Each of the plurality of drive sub-lines 31SL connects the plurality of drive main lines 31ML constituting the drive main line group 31G in parallel. A plurality of drive sub-lines 31SL that connect a plurality of drive main lines 31ML in parallel are included for each capacity detection unit ND. In FIG. 4, in the drive main line group 31G located at substantially the center of one capacity detection unit ND, three drive sub lines 31SL that connect the five drive main lines 31ML in parallel are included in one capacity detection unit ND. Yes. In the other drive main line group 31G included in one capacity detection unit ND, two drive sub-lines 31SL that connect the four drive main lines 31ML in parallel are included in one capacity detection unit ND. The two drive main line groups 31G included in one capacity detection unit ND share a drive sub line 31SL that connects the plurality of drive main lines 31ML in parallel.

  Here, each of the five drive main lines 31ML constituting the drive main line group 31G is a line segment common to two capacitance detection units ND adjacent to each other in the first electrode direction D1. The plurality of drive sub-lines 31SL include a line segment that connects the plurality of drive main lines 31ML constituting the drive main line group 31G in parallel, and a line segment that connects the plurality of drive main lines 31ML in parallel is 1 A plurality of capacitance detection units ND are included.

  That is, each of the two capacitance detection units ND arranged along the first electrode direction D1 includes a plurality of parallel circuits CP in which a part of each of the plurality of drive main lines 31ML is connected in parallel by the drive sub-line 31SL, and The plurality of parallel circuits CP adjacent to each other in the first electrode direction D1 are connected in series through sharing of the drive sub line 31SL.

  For example, in the drive main line group 31G located approximately at the center of the capacity detection unit ND, a part of each of the five drive main lines 31ML is connected in parallel by the drive sub line 31SL, and the drive main line 31ML and the drive sub line 31SL are connected to each other. Thus, one parallel circuit CP is configured. In the drive main line group 31G, one capacitance detection unit ND includes two parallel circuits CP, and further includes one parallel circuit CP straddling the two capacitance detection units ND. Each of these parallel circuits CP is connected in series through sharing of the drive sub line 31SL.

  In the other drive main line group 31G, a part of each of the four drive main lines 31ML is connected in parallel by a drive sub line 31SL, and one parallel circuit CP is constituted by the drive main line 31ML and the drive sub line 31SL. Has been. In the other drive main line group 31G, one capacitance detection unit ND includes one parallel circuit CP, and further includes one parallel circuit CP straddling the two capacitance detection units ND. Each of these parallel circuits CP is also connected in series through sharing of the drive sub line 31SL.

  Therefore, for example, even if the resistance value increases in a specific part indicated by a white circle in FIG. 4, a transmission path that bypasses the specific part is configured in a specific parallel circuit CP as indicated by a broken line in FIG. . In other parallel circuits CP other than the specific parallel circuit CP, a normal resistance value is obtained. As a result, the resistance value of the drive electrode 31DP increases due to an increase in the resistance value of a part of the drive electrode line, as compared with the configuration in which the drive electrode line is composed of only a line segment having a linear shape extending along the first electrode direction D1. Is suppressed.

  Moreover, in the two drive main line groups 31G included in one capacitance detection unit ND, the parallel circuit CP included in one drive main line group 31G and the parallel circuit CP included in the other drive main line group 31G are common. Are connected in parallel by the drive sub-line 31SL. Therefore, even if the resistance value in a specific parallel circuit CP increases in one drive main line group 31G, a transmission path that bypasses the specific parallel circuit CP is configured in the two drive main line groups 31G, and the specific parallel circuit CP In other parallel circuits CP other than the above, a normal resistance value is obtained. As a result, if the drive main line groups 31G adjacent to each other are connected in parallel, even if the resistance value in a specific parallel circuit CP increases, one drive main line group 31G is not a specific parallel circuit CP. Will function as usual.

  The number of drive main lines 31ML constituting the drive main line group 31G is the number of main lines, the number of drive sub lines 31SL connecting the plurality of drive main lines 31ML in parallel is the number of sub lines, and the number of main lines is larger than the number of sub lines. . In FIG. 4, the number of main lines is 5 and the number of sub-lines is 3 or 2. As described above, if the number of main lines and the number of sub-lines are different from each other, the number of intersections between the drive main line 31ML and the drive sub-line 31SL is smaller than that of the structure in which these numbers are equal to each other. Less in group 31G.

  Here, the angle at the intersection where the drive main line 31ML and the sensing electrode line intersect three-dimensionally usually has an angle formed from the direction in which the sensing electrode line extends and the first line direction DL1. On the other hand, when drive main line 31ML and drive subline 31SL are patterned, corners at the intersection of drive main line 31ML and drive subline 31SL are often rounded. Therefore, the area of the intersection between the drive main line 31ML and the drive sub line 31SL is likely to be larger than the intersection where the drive main line 31ML and the sensing electrode line intersect three-dimensionally. In this regard, with the configuration described above, in the configuration in which drive main line 31ML and drive subline 31SL intersect each other on drive electrode surface 31S, the number of intersections between drive main line 31ML and drive subline 31SL increases. Therefore, a decrease in the aperture ratio due to such an intersection is also suppressed.

  The angle θ1 formed between the first line direction DL1 and the second electrode direction D2 is not less than 0 ° and less than 90 °, and the angle θ2 formed between the second line direction DL2 and the first electrode direction D1 is 0. More than 90 degrees and less than 90 degrees. The first line direction DL1 and the second line direction DL2 are directions intersecting each other. In FIG. 4, the angle θ1 and the angle θ2 are 63.85 °, and the first line direction DL1 The angle formed with the second line direction DL2 is 90 °.

[Configuration of sensing electrode]
The configuration of the sensing electrode will be described with reference to FIG. In FIG. 5, for convenience of describing the arrangement of the plurality of sensing electrode lines constituting the sensing electrode 33SP, the portion constituting the four capacitance detection units ND in the two sensing electrodes 33SP is shown enlarged, and the sensing is performed. The line width of the electrode lines is exaggerated. Each of the plurality of sensing electrodes 33SP includes a plurality of sensing main lines 33ML and a plurality of sensing sublines 33SL. The sensing main lines 33ML and the drive main lines 31ML have mutually different extending directions, and the sensing sublines 33SL. And the drive sub-line 31SL also have mutually different extending directions. On the other hand, the relative positional relationship between the sensing main line 33ML and the sensing subline 33SL is the same as the relative positional relationship between the drive main line 31ML and the drive subline 31SL.

  As shown in FIG. 5, each of the plurality of sensing main lines 33ML has a straight line shape extending along the second line direction DL2 and is a line segment that is interrupted between the sensing electrodes 33SP adjacent to each other. In the plurality of sensing main lines 33ML, portions interrupted between the sensing electrodes 33SP adjacent to each other are surrounded by a broken-line circle in FIG. 5 and are arranged along the second electrode direction D2.

  The plurality of sensing main lines 33ML includes a plurality of sensing main lines 33ML common to two capacitance detection units ND adjacent to each other in the second electrode direction D2 as one sensing main line group 33G. FIG. 5 shows an example in which one sensing main line group 33G includes five sensing main lines 33ML, and two capacitance detection units ND adjacent to each other in the second electrode direction D2 have two sensing main line groups 33G. ing.

  The five sensing main lines 33ML constituting one sensing main line group 33G are arranged along the first line direction DL1 with a main line interval WM along the first line direction DL1. The two sensing main line groups 33G adjacent to each other in the first line direction DL1 are arranged along the first line direction DL1 with an interval twice the main line interval WM along the first line direction DL1.

  The plurality of sensing sub-lines 33SL have a straight line shape extending along the first line direction DL1, and are line segments that are interrupted between the sensing electrodes 33SP adjacent to each other. In the plurality of sensing sub-lines 33SL, portions that are interrupted between mutually adjacent sensing electrodes 33SP are surrounded by a broken-line circle in FIG. 5 and are arranged along the second electrode direction D2. The plurality of sensing sub-lines 33SL are arranged along the second line direction DL2 with a sub-line interval WS along the second line direction DL2.

  Each of the plurality of sensing sub-lines 33SL connects the plurality of sensing main lines 33ML constituting the sensing main line group 33G in parallel. A plurality of sensing sub-lines 33SL that connect a plurality of sensing main lines 33ML in parallel are included for each capacitance detection unit ND. In FIG. 5, in the sensing main line group 33G located at substantially the center of one capacitance detection unit ND, three sensing sublines 33SL that connect the five sensing main lines 33ML in parallel are included in one capacitance detection unit ND. Yes. In the other sensing main line group 33G included in one capacitance detection unit ND, one capacitance detection unit ND includes two sensing sublines 33SL that connect the four sensing main lines 33ML in parallel. The two sensing main line groups 33G included in one capacitance detection unit ND share a sensing subline 33SL that connects the plurality of sensing main lines 33ML in parallel.

  Here, each of the five sensing main lines 33ML constituting the sensing main line group 33G is a line segment common to two capacitance detection units ND adjacent to each other in the second electrode direction D2. The plurality of sensing sub-lines 33SL include a line segment that connects the plurality of sensing main lines 33ML constituting the sensing main line group 33G in parallel, and a line segment that connects the plurality of sensing main lines 33ML in parallel is 1 A plurality of capacitance detection units ND are included.

  That is, each of the two capacitance detection units ND arranged along the second electrode direction D2 includes a plurality of parallel circuits CP in which a part of each of the plurality of sensing main lines 33ML is connected in parallel by the sensing subline 33SL, and The plurality of parallel circuits CP adjacent to each other in the second electrode direction D2 are connected in series through sharing of the sensing subline 33SL.

  For example, in the sensing main line group 33G located approximately at the center of the capacitance detection unit ND, a part of each of the five sensing main lines 33ML is connected in parallel by the sensing sub line 33SL, and the sensing main line 33ML and the sensing sub line 33SL are connected to each other. Thus, one parallel circuit CP is configured. In the sensing main line group 33G, one capacitance detection unit ND includes two parallel circuits CP, and further includes one parallel circuit CP straddling the two capacitance detection units ND. Each of these parallel circuits CP is connected in series through sharing of the sensing subline 33SL.

  In the other sensing main line group 33G, a part of each of the four sensing main lines 33ML is connected in parallel by the sensing sub line 33SL, and one parallel circuit CP is constituted by the sensing main line 33ML and the sensing sub line 33SL. Has been. In the other sensing main line group 33G, one capacitance detection unit ND includes one parallel circuit CP, and further includes one parallel circuit CP straddling the two capacitance detection units ND. Each of these parallel circuits CP is also connected in series through sharing of the sensing subline 33SL.

  Therefore, for example, even if the resistance value increases in a specific part indicated by a white circle in FIG. 5, a transmission line that bypasses the specific part is configured in a specific parallel circuit CP as indicated by a broken line in FIG. . In other parallel circuits CP other than the specific parallel circuit CP, a normal resistance value is obtained. As a result, the resistance value of the sensing electrode 33SP increases due to an increase in the resistance value of a part of the sensing electrode line, compared to a configuration in which the sensing electrode line is composed only of a line segment having a linear shape extending along the second electrode direction D2. Can be suppressed.

  Moreover, in the two sensing main line groups 33G included in one capacitance detection unit ND, the parallel circuit CP included in one sensing main line group 33G and the parallel circuit CP included in the other sensing main line group 33G are common. Connected in parallel by a sensing sub-line 33SL. Therefore, even if the resistance value in the specific parallel circuit CP increases in one sensing main line group 33G, a transmission path that bypasses the specific parallel circuit CP is configured in the two sensing main line groups 33G, and the specific parallel circuit CP In other parallel circuits CP other than the above, a normal resistance value is obtained. As a result, if the sensing main line group 33G adjacent to each other is connected in parallel, even if the resistance value in a specific parallel circuit CP increases, one sensing main line group 33G is not a specific parallel circuit CP. Will function as usual.

  The number of sensing main lines 33ML constituting the sensing main line group 33G is the number of main lines, the number of sensing sub lines 33SL connecting the plurality of sensing main lines 33ML in parallel is the number of sub lines, and the number of main lines is larger than the number of sub lines. . In FIG. 5, the number of main lines is 5 and the number of sub-lines is 3 or 2. As described above, if the number of main lines and the number of sub-lines are different from each other, the number of intersections between the sensing main line 33ML and the sensing sub-line 33SL is different from the structure in which these numbers are equal to each other. Less in group 33G.

  Here, the angle at the intersection where the drive main line 31ML and the sensing main line 33ML intersect three-dimensionally usually has an angle formed from the first line direction DL1 and the second line direction DL2. On the other hand, when the sensing main line 33ML and the sensing subline 33SL are patterned, the corners at the intersection of the sensing main line 33ML and the sensing subline 33SL are often formed rounded. Therefore, the area of the intersection between the sensing main line 33ML and the sensing subline 33SL is likely to be larger than the intersection where the drive main line 31ML and the sensing main line 33ML intersect three-dimensionally. In this regard, with the configuration described above, in the configuration in which the sensing main line 33ML and the sensing subline 33SL intersect each other on the sensing electrode surface 33S, the number of intersections between the sensing main line 33ML and the sensing subline 33SL increases. Therefore, a decrease in the aperture ratio due to such an intersection is also suppressed.

[Configuration of electrode for touch panel]
The configuration of the touch panel electrode will be described with reference to FIG. In FIG. 6, the line widths of each of the plurality of line segments are exaggerated for convenience of explaining the arrangement of the plurality of line segments constituting the touch panel electrode. The drive electrode lines are indicated by thick black lines, and the sensing electrode lines are indicated by white bold lines.

  As shown in FIG. 6, the plurality of line segments constituting the drive electrode 31DP and the plurality of line segments constituting the sensing electrode 33SP are repetitions of a unit cell having a square shape which is an example of a quadrilateral shape. Constitutes one lattice pattern.

  The drive main line 31ML is disposed at a position that intersects the sensing main line 33ML and that does not overlap the sensing subline 33SL along the first line direction DL1. The drive sub-line 31SL is disposed at a position that intersects the sensing sub-line 33SL and that does not overlap with the sensing main line 33ML along the second line direction DL2. The sensing main line 33ML is disposed at a position that intersects with the drive main line 31ML and that does not overlap with the drive sub line 31SL along the second line direction DL2. The sensing subline 33SL is disposed at a position that intersects with the drive subline 31SL and that does not overlap with the drive main line 31ML along the first line direction DL1.

  One sensing sub-line 33SL is arranged in the gap between two drive main line groups 31G adjacent to each other in the second line direction DL2. The gap between two drive main line groups 31G adjacent to each other on the drive electrode surface 31S specifies the number of sensing sub-lines 33SL in configuring the above-described lattice pattern. The number of drive main lines 31ML constituting the drive main line group 31G and the number of sensing sub-lines 33SL have a complementary relationship.

  For example, the greater the number of drive main lines 31ML constituting the drive main line group 31G, the smaller the number of gaps between the drive main line groups 31G adjacent to each other, and the smaller the number of sensing sub-lines 33SL arranged in these gaps. On the other hand, the smaller the number of drive main lines 31ML constituting the drive main line group 31G, the greater the number of gaps between the drive main line groups 31G adjacent to each other, and the greater the number of sensing sub-lines 33SL arranged in these gaps.

  One drive sub line 31SL is arranged in the gap between two sensing main line groups 33G adjacent to each other in the first line direction DL1. The gap between the two sensing main line groups 33G adjacent to each other on the sensing electrode surface 33S specifies the number of drive sub-lines 31SL in configuring the above-described lattice pattern. The number of sensing main lines 33ML constituting the sensing main line group 33G and the number of drive sub-lines 31SL have a complementary relationship.

  For example, as the number of sensing main lines 33ML constituting the sensing main line group 33G increases, the number of gaps between the sensing main line groups 33G adjacent to each other decreases, and the number of drive sub-lines 31SL arranged in such gaps also decreases. On the contrary, the smaller the number of sensing main lines 33ML constituting the sensing main line group 33G, the larger the number of gaps between the sensing main line groups 33G adjacent to each other, and the greater the number of drive sub-lines 31SL arranged in these gaps.

  As described above, if the number of the drive main lines 31ML constituting the drive main line group 31G and the number of the sensing sub-lines 33SL have a complementary relationship, the drive main line 31ML and the sensing sub-line 33SL Easy to design. If the number of sensing main lines 33ML constituting the sensing main line group 33G and the number of drive sub-lines 31SL have a complementary relationship, the design of the sensing main line 33ML and the drive sub-line 31SL is easy. But there is.

  Here, in plan view opposite to the plane including the plurality of sensing electrodes 33SP, each of the drive electrode lines and the sensing electrode lines preferably has a black color in order to suppress light scattering in these. . The blackening of the drive electrode line and the sensing electrode line is realized by, for example, oxidation treatment of metal wiring or plating treatment of a metal film having black.

  On the other hand, the spatial position of the drive electrode line and the spatial position of the sensing electrode line are different from each other in plan view. , And at least one of the saturations is different between the drive electrode line and the sensing electrode line. In this regard, in the touch sensor electrode described above, one sensing sub-line 33SL is disposed in the gap between the two drive main line groups 31G adjacent to each other in a plan view facing the plane including the plurality of sensing electrodes 33SP. Has been. In addition, one drive sub line 31SL is disposed in the gap between two sensing main line groups 33G adjacent to each other. Therefore, it becomes difficult to individually recognize the color of the drive electrode 31DP and the color of the sensing electrode 33SP. Even if the color of the drive electrode 31DP and the color of the sensing electrode 33SP are different from each other, the difference between the color of the drive electrode 31DP and the color of the sensing electrode 33SP is less noticeable. As a result, the boundary between the drive electrode 31DP and the sensing electrode 33SP is suppressed from being visually recognized, and the drive electrode 31DP and the sensing electrode 33SP are prevented from being visually recognized.

  The touch sensor electrode described above is appropriately designed according to the first pixel width WP1, the second pixel width WP2, and the third pixel width WP3 in the pixel 15P, and an example of such a design procedure is shown below.

  First, in order to suppress the moire due to the interference between the black matrix and the lattice pattern, the wiring width of the line segment constituting the lattice pattern, the interval between the line segments constituting the lattice pattern, the angle θ1 described above, and the above-described An angle θ2 is set. Thereby, one lattice pattern which is a repetition of the unit lattice is set.

  Next, the line segments constituting the grid pattern are the line segments constituting the drive electrode 31DP so that the initial value of the capacitance between the drive electrode 31DP and the sensing electrode 33SP is within the range obtained from the peripheral circuit. And a line segment constituting the sensing electrode 33SP. At this time, the drive main line 31ML, the drive subline 31SL, the sensing main line 33ML, and the sensing subline 33SL are arranged so that the ratio of the number of sublines to the number of main lines is substantially equal between the drive electrode 31DP and the sensing electrode 33SP. Is set.

As described above, according to the first embodiment, the effects listed below can be obtained.
(1) It is possible to suppress an increase in the resistance value of the drive electrode 31DP including a plurality of drive electrode lines due to an increase in the resistance value in a part of the drive electrode lines.

  (2) It is possible to suppress an increase in the resistance value of the sensing electrode 33SP including a plurality of sensing electrode lines due to an increase in the resistance value of a part of the sensing electrode line.

  (3) The drive sub line 31SL constituting the drive electrode 31DP and the sensing main line group 33G constituting the sensing electrode 33SP are alternately repeated along the first line direction DL1. Therefore, even if the color of the drive electrode 31DP and the color of the sensing electrode 33SP are different from each other, the drive electrode 31DP and the sensing electrode 33SP are visually recognized as separate structures due to the difference in these colors. Is suppressed.

(4) The drive main line group 31G constituting the drive electrode 31DP and the sensing sub line 33SL constituting the sensing electrode 33SP are alternately repeated along the second line direction DL2. Therefore, even if the color of the drive electrode 31DP and the color of the sensing electrode 33SP are different from each other, the drive electrode 31DP and the sensing electrode 33SP are visually recognized as separate structures due to the difference in these colors. Is suppressed.
(5) Since an increase in the number of intersections between the drive main line 31ML and the drive sub-line 31SL is suppressed, a decrease in the aperture ratio due to such an intersection can also be suppressed.
(6) Since an increase in the number of intersections between the sensing main line 33ML and the sensing subline 33SL is suppressed, a decrease in the aperture ratio due to such an intersection can also be suppressed.

[Second Embodiment]
With reference to FIGS. 7 to 10, the touch sensor electrode, the touch panel, and the display device according to the second embodiment will be described. Below, the structure of a display apparatus, the electrical structure of a touch panel, the structure of a drive electrode, and the structure of a sensing electrode are demonstrated. In the second embodiment, the configuration of the drive electrode line and the configuration of the sensing electrode line are mainly different from the first embodiment. Below, the difference of these structures is mainly demonstrated, the same code | symbol is attached | subjected to the structure similar to the structure in 1st Embodiment, and the description is omitted.

[Drive electrode 31DP]
As shown in FIG. 7, the plurality of drive main lines 31ML include a plurality of drive main lines 31ML that are common to two capacitance detection units ND adjacent to each other in the first electrode direction D1, and the plurality of drive main lines 31ML are common to each other. A drive main line group 31G is configured. In FIG. 7, one drive main line group 31G is composed of seven drive main lines 31ML, and two capacitance detectors ND adjacent to each other in the first electrode direction D1 have one drive main line group 31G. .

  The seven drive main lines 31ML constituting the drive main line group 31G are arranged along the second line direction DL2 with a main line interval WM along the second line direction DL2. The seven drive main lines 31ML constituting the drive main line group 31G are composed of a plurality of line segments that are conductive in the adjacent capacitance detection units ND and a plurality of dummy main lines 31MLD that are line segments that are interrupted in the capacitance detection unit ND. Has been.

  As in the first embodiment, the plurality of drive sub-lines 31SL are linear segments extending along the second line direction DL2 and are interrupted between the drive electrodes 31DP adjacent to each other. The plurality of drive sub-lines 31SL are arranged along the first line direction DL1 with a sub-line interval WS along the first line direction DL1. The sub-line interval WS, which is the pitch at which the drive sub-line 31SL is formed, is set sufficiently larger than the main line interval WM, and is 8 times the main line interval WM in FIG.

  As shown in FIG. 8, the seven drive main lines 31ML constituting the drive main line group 31G include four dummy main lines 31MLD. Each of the four dummy main lines 31MLD is interrupted at a portion intersecting with the drive sub line 31SL. Of the plurality of drive main lines 31ML constituting the drive main line group 31G, line segments other than the dummy main line 31MLD are connected in parallel by a drive sub line 31SL.

  A plurality of drive sub-lines 31SL that connect a plurality of drive main lines 31ML in parallel are included for each capacity detection unit ND. In FIG. 8, in the drive main line group 31G, three drive sub-lines 31SL that connect the three drive main lines 31ML in parallel are included in one capacitance detection unit ND. A part of each of the three drive main lines 31ML is connected in parallel by a drive sub line 31SL, and the drive main line 31ML and the drive sub line 31SL constitute one parallel circuit CP.

  In the drive main line group 31G, one capacitance detection unit ND includes one parallel circuit CP, and further includes one parallel circuit CP straddling the two capacitance detection units ND. Each of these parallel circuits CP is connected in series through sharing of the drive sub line 31SL, as in the first embodiment. The drive main line group 31G included in one capacity detection unit ND is connected in parallel by a drive main line 31ML other than the drive main line group 31G and a drive sub line 31SL.

  Here, the electrostatic capacitance between the drive electrode 31DP and the sensing electrode 33SP is determined by the area occupied by the electrode portion composed of the plurality of parallel circuits CP. The dummy main lines 31MLD included in the drive main line group 31G have a function of determining such capacitance by the number of dummy main lines 31MLD, and the number is designed so that the initial value of the capacitance is within a desired range. Yes.

  A dummy main line 31MLD, which is a short line segment extending along the first line direction DL1, is further arranged in a gap between two drive main line groups 31G adjacent to each other. Each of the dummy main line 31MLD included in the drive main line group 31G and the dummy main line 31MLD located in the gap between the drive main line group 31G is a line segment insulated from the parallel circuit CP.

  A dummy sub-line 31SLD straddling the two capacitance detection units ND is disposed in the vicinity of the boundary between the two capacitance detection units ND adjacent to each other and at a position different from the position of the drive main line group 31G. Like the dummy main line 31MLD, the dummy sub-line 31SLD is a line segment disposed at a position different from the region occupied by the parallel circuit CP. The interval WD between the drive sub-line 31SL and the dummy sub-line 31SLD is the sub-line. It is different from the interval WS.

[Sensing electrode 33SP]
As shown in FIG. 9, the plurality of sensing main lines 33ML includes a plurality of sensing main lines 33ML common to the two capacitance detection units ND adjacent to each other in the second electrode direction D2, and the plurality of sensing main lines 33ML A sensing main line group 33G is configured. In FIG. 9, one sensing main line group 33G is composed of seven sensing main lines 33ML, and two capacitance detectors ND adjacent to each other in the first electrode direction D1 have one sensing main line group 33G. .

  The seven sensing main lines 33ML constituting the sensing main line group 33G are arranged along the first line direction DL1 with a main line interval WM along the first line direction DL1. The seven sensing main lines 33ML constituting the sensing main line group 33G are composed of a plurality of line segments that are conductive in the adjacent capacitance detection units ND and a plurality of dummy main lines 33MLD that are line segments interrupted in the capacitance detection unit ND. ing.

  As in the first embodiment, the plurality of sensing sub-lines 33SL are linear segments extending along the first line direction DL1 and interrupted between the sensing electrodes 33SP adjacent to each other. The plurality of sensing sub-lines 33SL are arranged along the second line direction DL2 with a sub-line interval WS along the second line direction DL2. The sub-line interval WS, which is the pitch at which the sensing sub-line 33SL is formed, is set sufficiently larger than the main line interval WM, and is 8 times the main line interval WM in FIG.

  As shown in FIG. 10, the seven sensing main lines 33ML constituting the sensing main line group 33G include four dummy main lines 33MLD. Each of the four dummy main lines 33MLD is interrupted at a portion where it intersects with the sensing sub line 33SL. Of the plurality of sensing main lines 33ML constituting the sensing main line group 33G, line segments other than the dummy main line 33MLD are connected in parallel by a sensing sub line 33SL.

  A plurality of sensing sub-lines 33SL that connect a plurality of sensing main lines 33ML in parallel are included for each capacitance detection unit ND. In FIG. 10, in the sensing main line group 33G, three sensing sublines 33SL that connect the three sensing main lines 33ML in parallel are included in one capacitance detection unit ND. A part of each of the three sensing main lines 33ML is connected in parallel by a sensing subline 33SL, and the sensing main line 33ML and the sensing subline 33SL constitute one parallel circuit CP.

  In the sensing main line group 33G, one capacitance detection unit ND includes one parallel circuit CP, and further includes one parallel circuit CP straddling the two capacitance detection units ND. Each of these parallel circuits CP is connected in series through sharing of the drive sub line 31SL, as in the first embodiment. The sensing main line group 33G included in one capacitance detection unit ND is connected in parallel by a sensing main line 33ML and a sensing subline 33SL other than the sensing main line group 33G. Similar to the dummy main line 31MLD included in the drive main line group 31G, the dummy main line 33MLD included in the sensing main line group 33G has a function of determining the capacitance based on the number of dummy main lines 33MLD, and the initial value of the capacitance is in a desired range. That number is designed to be within.

  A dummy main line 33MLD, which is a short line segment extending along the second line direction DL2, is arranged in a gap between two sensing main line groups 33G adjacent to each other. Each of the dummy main line 33MLD included in the drive main line group 31G and the dummy main line 33MLD located in the gap between the sensing main line group 33G is a line segment insulated from the parallel circuit CP.

  One dummy sub-line 33SLD is disposed in the vicinity of the boundary between the two capacitance detection units ND adjacent to each other and different from the position of the sensing main line group 33G. Like the dummy main line 33MLD, the dummy subline 33SLD is a line segment disposed at a position different from the region occupied by the parallel circuit CP. The interval WD between the sensing subline 33SL and the dummy subline 33SLD is the subline. It is different from the interval WS.

  As described above, if the short dummy main line 31MLD is located in the gap between the drive main line groups 31G, the structure that gives the same visibility as the drive main line 31ML is more difficult to be repeated at a constant period. The same applies to the configuration in which the short dummy main line 33MLD is located in the gap between the sensing main line group 33G.

  In addition, in the configuration in which the dummy sub-line 31SLD is arranged at an interval WD different from the sub-line interval WS that is an interval at which the drive sub-line 31SL is formed, a structure that provides the same visibility as the drive sub-line 31SL is provided. It becomes difficult to be repeated by a certain period. The same applies to the configuration in which the dummy sub-lines 33SLD are arranged at intervals WD different from the sub-line intervals WS.

  Here, a transparent dielectric substrate 33 as a structure is sandwiched between the drive electrode 31DP and the sensing electrode 33SP. For this reason, the color of the drive electrode line and the color of the sensing electrode line differ from each other in a plan view opposite to the plane including the plurality of sensing electrodes 33SP. In this regard, if the dummy main line 31MLD and the dummy sub line 31SLD are positioned at a different period from the period at which the drive main line 31ML is located and the period at which the drive sub line 31SL is located, the color of the drive electrode line and the sensing electrode The difference in visibility based on the difference from the color of the line is not repeated with a certain period. Therefore, the appearance of the pattern in which the drive electrode 31DP and the sensing electrode 33SP are visually recognized as separate structures based on the difference in visibility is suppressed. The same applies to a configuration in which the period at which the sensing main line 33ML is positioned and the period at which the sensing subline 33SL is positioned are not constant.

As mentioned above, according to the said 2nd Embodiment, the effect enumerated below is acquired.
(1) Since the dummy main lines 31MLD and 33MLD are included in the region where the parallel circuit CP is formed, the dummy main lines 31MLD and 33MLD are compared with a configuration in which the dummy main lines 31MLD and 33MLD are separately formed at positions different from the parallel circuit CP. The occupied area can be expanded and the gap between the parallel circuits CP adjacent to each other can be reduced. Therefore, in the drive electrodes 31DP adjacent to each other, the distance between the parallel circuit CP in one drive electrode 31DP and the parallel circuit CP in the other drive electrode 31DP can be shortened. As a result, the site | part which can detect an electrostatic capacitance can be made dense in the drive electrode surface 31S.

  (2) The dummy main line 31MLD is a line segment interrupted at a portion where the drive main line 31ML and the drive sub line 31SL intersect. The dummy main line 33MLD is also a broken line segment at the intersection of the sensing main line 33ML and the sensing subline 33SL. Therefore, compared with the configuration in which the dummy main line 31MLD and the drive subline 31SL intersect, and in the configuration in which the dummy main line 33MLD and the sensing subline 33SL intersect, the number of intersections of these line segments increases. It can be suppressed. Therefore, a decrease in aperture ratio due to an increase in the number of such intersections can be suppressed.

  (3) It is suppressed that the difference in visibility based on the difference between the color of the drive electrode line and the color of the sensing electrode line is repeated at a constant period. Therefore, the pattern appearance based on the difference in visibility is suppressed.

  (4) In the configuration in which the dummy main lines 31MLD and 33MLD are irregularly arranged, it is necessary to provide a gap in a portion of the sensing electrode surface 33S facing the dummy main line 31MLD. In addition, since it is necessary to provide a gap in the portion of the drive electrode surface 31S facing the dummy main line 33MLD, the design of the drive electrode 31DP and the sensing electrode 33SP is complicated. In addition, when such electrodes are formed by exposure, the amount of data used for exposure becomes enormous. In this respect, with the above-described configuration, since the dummy main lines 31MLD and 33MLD have periodicity for each capacitance detection unit ND, it is easy to design the drive electrode 31DP and the sensing electrode 33SP, and the data capacity used for exposure. Is also suppressed.

  (5) The same applies to the configuration in which the dummy sub-lines 31SLD and 33SLD are irregularly arranged. Also in this respect, the drive electrode 31DP and the sensing electrode 33SP can be easily designed, and the data capacity used for exposure Is also suppressed.

In addition, the said embodiment can also be suitably changed and implemented as follows.
[Secondary line]
The sub-line interval WS that is the interval between the adjacent drive sub-lines 31SL may be the same as the main line interval WM that is the interval between the adjacent drive main lines 31ML. For example, a configuration in which two drive sub-lines 31SL having the main line interval WM are located in one capacitance detection unit ND may be employed.
The sub-line interval WS that is the interval between the sensing sub-lines 33SL adjacent to each other may be the same as the main line interval WM that is the interval between the adjacent sensing main lines 33ML. For example, the configuration may be such that two sensing sublines 33SL having the main line interval WM are positioned in one capacitance detection unit ND.

In order to suppress an increase in the number of intersections between the drive main line 31ML and the drive sub line 31SL and to suppress a decrease in the aperture ratio due to the intersection, the main line interval WM and the sub line interval WS are the same. The number of drive main lines 31ML and the number of drive sub lines 31SL are preferably different from each other.
Any one of the drive sub line 31SL and the sensing sub line 33SL may be omitted.

[Main line group]
The number of drive main lines 31ML constituting the drive main line group 31G and the number of sensing main lines 33ML constituting the sensing main line group 33G can be arbitrarily changed as long as a lattice pattern can be formed.

  The interval between the two drive main line groups 31G adjacent to each other may be the same as the main line interval WM that is the interval between the two drive main lines 31ML adjacent to each other. At this time, in the interval between the plurality of drive main lines 31ML constituting the drive main line group 31G, if the configuration has an interval that is twice or more the main line interval WM, It is possible to arrange the sensing subline 33SL.

  The interval between the two sensing main line groups 33G adjacent to each other may be the same as the main line interval WM that is the interval between the two adjacent sensing main lines 33ML. At this time, in the interval between the plurality of sensing main lines 33ML constituting the sensing main line group 33G, if the configuration has an interval more than twice the main line interval WM, A drive sub-line 31SL can be arranged.

[Dummy line]
The dummy main lines 31MLD and 33MLD may be arranged outside the area occupied by the parallel circuit CP. With such a configuration, the length of the line segment constituting the parallel circuit CP can be shortened as the area occupied by the parallel circuit CP is reduced, so that the resistance of the drive electrode 31DP and the sensing electrode 33SP can be reduced. It becomes easy to be illustrated.

[Touch panel]
As shown in FIG. 11, the transparent substrate 31 and the transparent adhesive layer 32 may be omitted from the touch sensor electrode 21 constituting the touch panel 20. In such a configuration, one surface facing the display panel 10 among the surfaces of the transparent dielectric substrate 33 is set as the drive electrode surface 31S, and the drive electrode 31DP may be positioned on the drive electrode surface 31S. The sensing electrode 33SP may be positioned on the surface of the transparent dielectric substrate 33 that faces the drive electrode surface 31S.
In such a configuration, the drive electrode 31DP is formed, for example, by patterning one thin film formed on the drive electrode surface 31S.

  As shown in FIG. 12, in the touch panel 20, the drive electrode 31 DP, the transparent substrate 31, the transparent adhesive layer 32, the transparent dielectric substrate 33, the sensing electrode 33 SP, and the transparent adhesive layer 23 in order from the components close to the display panel 10. The cover layer 22 may be located.

  In such a configuration, for example, the drive electrode 31DP is formed on the drive electrode surface 31S that is one surface of the transparent substrate 31, and the sensing electrode 33SP is the sensing electrode surface 33S that is one surface of the transparent dielectric substrate 33. Formed. The surface of the transparent substrate 31 facing the drive electrode surface 31S and the surface of the transparent dielectric substrate 33 corresponding to the sensing electrode surface 33S are bonded by the transparent adhesive layer 32.

  The display panel 10 and the touch panel 20 may not be formed separately, and the touch panel 20 may be formed integrally with the display panel 10. In such a configuration, for example, among the touch sensor electrodes 21, a plurality of drive electrodes 31DP are positioned on the TFT layer 13, while a plurality of sensing electrodes 33SP are positioned between the color filter substrate 16 and the upper polarizing plate 17. It can be configured as a mold. Alternatively, an on-cell configuration in which the touch sensor electrode 21 is located between the color filter substrate 16 and the upper polarizing plate 17 may be employed.

  CP ... Parallel circuit, D1 ... first electrode direction, D2 ... second electrode direction, ND ... capacitance detector, DL1 ... first line direction, DL2 ... second line direction, 10 ... display panel, 11 ... lower polarizing plate , 12 ... Thin film transistor substrate, 13 ... TFT layer, 14 ... Liquid crystal layer, 15 ... Color filter layer, 15a ... Black matrix, 15P ... Pixel, 16 ... Color filter substrate, 17 ... Upper polarizing plate, 20 ... Touch panel, 21 ... Touch Sensor electrode, 22 ... cover layer, 23 ... transparent adhesive layer, 31 ... transparent substrate, 31DP ... drive electrode, 31G ... drive main line group, 31ML ... drive main line, 31MLD, 33MLD ... dummy main line, 31SL ... drive sub line, 31SLD , 33SLD ... dummy sub line, 33 ... transparent dielectric substrate, 33P ... sensing electrode, 33SL ... sensing sub line, 34 ... selected times , 35 ... detecting circuit, 36 ... control unit.

Claims (9)

A plurality of first electrodes having a band shape extending along a first electrode direction that is one direction and arranged with a gap along a second electrode direction that intersects the first electrode direction; ,
A plurality of second electrodes having a strip shape extending along the second electrode direction and arranged in a gap along the first electrode direction and three-dimensionally intersecting each of the plurality of first electrodes When,
With
Each of the plurality of first electrodes has a linear shape extending along a first line direction that is one direction, and a plurality of first segments that are line segments that are interrupted between the first electrodes adjacent to each other. One main line and a plurality of first sub-lines that are linear segments extending along a second line direction that is a direction intersecting the first line direction;
Each of the plurality of second electrodes has a plurality of second main lines that have a linear shape extending along the second line direction and are line segments that are interrupted between the second electrodes adjacent to each other. A plurality of second sub-lines that are line segments having a linear shape extending along the first line direction;
In a plan view facing a plane including a plurality of the second electrodes,
The plurality of line segments constituting the first electrode and the plurality of line segments constituting the second electrode constitute one lattice pattern which is a repetition of a unit lattice having a quadrangular shape, and The first line direction and the second line direction are configured not to overlap each other,
A portion where the first electrode and the second electrode overlap each other is a capacitance detection unit,
The plurality of first main lines include, as one main line group, the plurality of first main lines common to the plurality of capacitance detection units adjacent to each other in the first electrode direction,
The plurality of first sub-lines include a plurality of the first sub-lines that connect the plurality of first main lines constituting the main line group in parallel for each of the capacitance detection units. The main line group is a first main line group,
In a plan view facing a plane including a plurality of the second electrodes,
The plurality of second main lines include a plurality of second main lines common to the plurality of capacitance detection units adjacent to each other in the second electrode direction as one second main line group,
2. The plurality of second sub-lines include a plurality of second sub-lines that connect the plurality of second main lines configuring the second main line group in parallel for each of the capacitance detection units. Touch sensor electrode. The second electrode is
A plurality of the second main line groups arranged with a gap along the first line direction;
In a plan view facing a plane including a plurality of the second electrodes,
At least one of the first sub-lines connecting a plurality of the first main lines in parallel is:
Located in the gap between the second main line groups adjacent to each other; and
The touch sensor electrode according to claim 2, wherein the capacitance detection unit has a linear shape over the entire second line direction. The first electrode is
A plurality of the first main line groups arranged with a gap along the second line direction;
In a plan view facing a plane including a plurality of the second electrodes,
At least one of the second sub-lines connecting the plurality of second main lines in parallel is:
Located in the gap between the first main line groups adjacent to each other; and
4. The touch sensor electrode according to claim 2, wherein the capacitance detection unit has a linear shape over the entire first line direction. 5. 5. The number of the first main lines constituting the first main line group is larger than the number of the first sub lines connecting the plurality of first main lines constituting the first main line group in parallel. The electrode for touch sensors as described in any one of these. 6. The number of the second main lines constituting the second main line group is larger than the number of the second sub lines connecting the plurality of second main lines constituting the second main line group in parallel. The electrode for touch sensors as described in any one of these. The first electrode direction and the second electrode direction are directions orthogonal to each other,
The first line direction and the second line direction are directions orthogonal to each other,
The touch sensor electrode according to any one of claims 1 to 6, wherein the first line direction is a direction intersecting the first electrode direction and the second electrode direction. A touch sensor electrode comprising: a plurality of first electrodes; a plurality of second electrodes; and a transparent dielectric layer sandwiched between the plurality of first electrodes and the plurality of second electrodes;
A cover layer covering the touch sensor electrode;
A peripheral circuit for measuring a capacitance between the first electrode and the second electrode,
The touch sensor electrode is:
A touch panel that is an electrode for a touch sensor according to claim 1. A display panel for displaying information;
A touch panel that transmits the information displayed on the display panel;
A drive circuit for driving the touch panel,
The said touch panel is a touch panel of Claim 8. A display apparatus.