WO2024004537A1 - Motif d'électrode et capteur tactile l'utilisant - Google Patents

Motif d'électrode et capteur tactile l'utilisant Download PDF

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Publication number
WO2024004537A1
WO2024004537A1 PCT/JP2023/020844 JP2023020844W WO2024004537A1 WO 2024004537 A1 WO2024004537 A1 WO 2024004537A1 JP 2023020844 W JP2023020844 W JP 2023020844W WO 2024004537 A1 WO2024004537 A1 WO 2024004537A1
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WIPO (PCT)
Prior art keywords
electrode
touch sensor
electrode pattern
receiving
thin
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Application number
PCT/JP2023/020844
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English (en)
Japanese (ja)
Inventor
直斗 市川
暁豊 陸
光 佐藤
Original Assignee
パナソニックＩｐマネジメント株式会社
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Publication of WO2024004537A1 publication Critical patent/WO2024004537A1/fr

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Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means

Definitions

  • the present invention relates to an electrode pattern and a touch sensor using the same.
  • Patent Document 1 Conventionally, for example, the one shown in Patent Document 1 has been known regarding a capacitive touch sensor.
  • Patent Document 1 discloses a capacitive touch sensor that includes a plurality of first mesh electrodes and a plurality of second mesh electrodes.
  • the plurality of first mesh electrodes are formed on the surface of the substrate (support body) of the touch sensor.
  • the plurality of second mesh electrodes are formed on the back surface of the substrate of the touch sensor.
  • the substrate is made of a flexible transparent material (transparent film material).
  • Each of the first and second mesh electrodes is constituted by a mesh pattern formed by arranging a plurality of cells made of a plurality of thin wires (thin metal wires). Each cell has a diamond shape. Adjacent cells are arranged such that the vertices of the rhombuses forming each cell are in contact with each other at one intersection (see FIG. 3 of Patent Document 1).
  • touch sensors that can be applied to smartphones etc. that are configured to be foldable depending on the usage situation, or touch sensors that can be applied to displays with curved operation screens (i.e. , touch sensors fixed in a predetermined curved shape) are attracting attention.
  • the present disclosure has been made in view of these points, and its purpose is to make it difficult for thin wires to break in an electrode pattern for forming an electrode.
  • an electrode pattern according to an embodiment of the present disclosure is for forming an electrode, and is formed so that a plurality of cells are adjacent to each other.
  • Each of the plurality of cells is made of a conductive thin wire, and the thin wire is formed in a ring shape.
  • Adjacent cells are configured such that each thin line contacts each other at one intersection, and a portion of the thin line corresponding to one intersection is curved.
  • FIG. 1 is an overall perspective view of a touch sensor according to an embodiment of the present disclosure.
  • FIG. 2 is a sectional view taken along the line II--II in FIG.
  • FIG. 3 is a schematic perspective view of the touch sensor viewed from the front side.
  • FIG. 4 is a schematic diagram showing the transmitting electrode, the first wiring section, and the pad as seen from the back side of the substrate.
  • FIG. 5 is a schematic diagram showing the receiving electrode, the second wiring section, and the pad as viewed from the front side of the substrate.
  • FIG. 6 is a partially enlarged view of the VI section shown in FIG. 3.
  • FIG. 7 is a diagram schematically showing the configuration of an electrode pattern in a transmitting electrode.
  • FIG. 1 is an overall perspective view of a touch sensor according to an embodiment of the present disclosure.
  • FIG. 2 is a sectional view taken along the line II--II in FIG.
  • FIG. 3 is a schematic perspective view of the touch sensor viewed from the front side.
  • FIG. 8 is a diagram schematically showing the configurations of the electrode pattern, dummy pattern, and dummy electrode in the receiving electrode.
  • FIG. 9 is a partially enlarged view of section IX shown in FIG. 6.
  • FIG. 10 is a diagram schematically showing a contact state between adjacent cells in an electrode pattern according to an embodiment of the present disclosure.
  • FIG. 11 is a cross-sectional view schematically showing the cross-sectional state of the thin wire.
  • FIG. 12 is a diagram corresponding to FIG. 10 schematically showing the contact state between adjacent cells in the electrode pattern of Modification 1.
  • FIG. 13 is a diagram corresponding to FIG. 10 schematically showing the contact state between adjacent cells in the electrode pattern of Modification 2.
  • FIG. 1 shows the entire touch sensor 1 according to an embodiment of the present disclosure.
  • the touch sensor 1 is a capacitive sensor type input device applied to the display 100 (see FIG. 2).
  • the touch sensor 1 can be used as an input device for, for example, in-vehicle devices such as car navigation systems, display devices for personal computers, mobile phones, personal digital assistants, portable game machines, copy machines, ticket vending machines, automatic teller machines, watches, etc. used.
  • the side on which the operation surface 2b (see FIGS. 1 and 2) of the cover member 2 (described later) is located will be referred to as the "front side” of the touch sensor 1, and the opposite side will be referred to as the "back side” of the touch sensor 1.
  • the positional relationship of each element constituting the sensor 1 shall be determined.
  • the direction from the left side of the paper to the right side of the paper in FIG. direction Y' shall be determined.
  • the touch sensor 1 includes a cover member 2 having optical transparency.
  • the cover member 2 is made of, for example, a cover glass or a plastic cover lens.
  • the cover member 2 is formed, for example, in a plate shape that is rectangular in plan view.
  • the cover member 2 is fixed to a second layer 5 (see FIG. 11) of the substrate 3, which will be described later.
  • a substantially frame-shaped decorative portion 2a is formed in a dark color such as black by screen printing or the like.
  • An internal rectangular area surrounded by the decorative portion 2a serves as a view area V through which light can be transmitted. That is, the user can obtain visual information from the display placed on the back side of the touch sensor 1 via this viewing area V.
  • the surface of the cover member 2 in the view area V is configured as an operation surface 2b that the user's fingers or the like comes into contact with during a touch operation.
  • the touch sensor 1 includes one substrate 3. As shown in FIGS. As shown in FIG. 11, the substrate 3 has a first layer 4 and a second layer 5. Each of the first layer 4 and the second layer 5 is formed, for example, into a substantially rectangular shape in plan view.
  • the first layer 4 is made of a transparent resin material.
  • transparent resin materials include resin materials such as PET (polyethylene terephthalate), polycarbonate, COP (cycloolefin polymer), and COC (cycloolefin copolymer).
  • the second layer 5 is laminated on the surface of the first layer 4. Although not shown, in this embodiment, the second layer 5 is also stacked on the back surface of the first layer 4.
  • the second layer 5 is a layer for forming a plurality of grooves 6, which will be described later.
  • the second layer 5 is made of an insulating and transparent resin material.
  • the thickness of the second layer 5 is set to, for example, 1.0 ⁇ m to 10.0 ⁇ m in order to ensure flexibility. Further, the thickness of the second layer 5 is formed to be larger than the depth of the groove portion 6, which will be described later.
  • a plurality of grooves 6 are provided on the surface of the second layer 5. Although not shown, a plurality of grooves 6 are also provided on the back surface of the second layer 5. Each groove 6 has a bottomed shape recessed in the thickness direction of the substrate 3. The depth of each groove portion 6 is set to, for example, 0.9 ⁇ m to 3.0 ⁇ m.
  • the touch sensor 1 includes an adhesive layer 7.
  • the adhesive layer 7 is laminated between the cover member 2 and the substrate 3.
  • the adhesive layer 7 is an optical adhesive (OCA: Optical Clear Adhesive) having optical transparency.
  • OCA Optical Clear Adhesive
  • the thickness of the adhesive layer 7 is, for example, 25 ⁇ m to 250 ⁇ m.
  • the touch sensor 1 includes a flexible wiring board 8.
  • the flexible wiring board 8 has flexibility and is configured so that its electrical characteristics do not change even in a deformed state.
  • the flexible wiring board 8 is made of a flexible insulating film such as polyimide (PI), polyethylene terephthalate (PET), polyethylene naphthalate (PEN), or the like.
  • the touch sensor 1 includes a plurality of capacitive electrodes.
  • the plurality of electrodes is composed of a plurality of transmitting electrodes 11 and a plurality of receiving electrodes 12.
  • the plurality of transmitting electrodes 11 and the plurality of receiving electrodes 12 are arranged on the substrate 3 at positions corresponding to the viewing area V (see FIG. 1).
  • the touch sensor 1 is capable of detecting a touch operation by a user's finger (detection target) that is in contact with the operation surface 2b through a plurality of transmitting electrodes 11 and a plurality of receiving electrodes 12 located within a view area V. .
  • Each transmitting electrode 11 is connected to a drive circuit (not shown) via a flexible wiring board 8. Each transmitting electrode 11 is configured to radiate an electric field to its surroundings by this drive circuit. On the other hand, each receiving electrode 12 is connected to a detection circuit (not shown) via a flexible wiring board 8. Each receiving electrode 12 is configured to receive the electric field radiated from each transmitting electrode 11.
  • each transmitting electrode 11 and each receiving electrode 12 are arranged so as to intersect (orthogonally) each other in a plan view.
  • a node is formed in a region where each transmitting electrode 11 and each receiving electrode 12 overlap. This node is configured as a region where capacitance can be generated.
  • the plurality of transmitting electrodes 11 are provided on the back side of the substrate 3. Each transmitting electrode 11 extends along the long side direction of the substrate 3 (first direction X). The plurality of transmitting electrodes 11 are arranged at intervals from each other in the short side direction of the substrate 3 (second direction Y). As shown in FIG. 9, the spacing ES between the transmitting electrodes 11, 11 is set to, for example, 1 ⁇ m or more and 20 ⁇ m or less.
  • the plurality of receiving electrodes 12 are provided on the front surface side of the substrate 3. That is, the plurality of receiving electrodes 12 are arranged on the substrate 3 on the viewing side of the touch sensor 1 (the side on which the operation surface 2b of the cover member 2 is located).
  • the plurality of receiving electrodes 12 are insulated from the plurality of transmitting electrodes 11 via the substrate 3.
  • Each receiving electrode 12 extends along the short side direction (second direction Y) of the substrate 3.
  • the plurality of receiving electrodes 12 are arranged at intervals from each other in the long side direction of the substrate 3 (first direction X).
  • the pitch EP between the receiving electrodes 12, 12 in the first direction X is, for example, 3 mm or more and 7 mm or less.
  • the electrode width EW2 of the receiving electrode 12 is configured to be smaller than the pitch EP between the receiving electrodes 12, 12.
  • the electrode width EW2 of the receiving electrode 12 is, for example, 0.5 mm or more.
  • the electrode width EW2 of the receiving electrode 12 is configured to be smaller than the electrode width EW1 of the transmitting electrode 11.
  • each receiving electrode 12 is provided with dot hatching in order to make it easier to see the overlapping state of each transmitting electrode 11 and each receiving electrode 12.
  • first and second ground portions 34 and 35 which will be described later
  • first and second gland portions 34 and 35 which will be described later, are omitted.
  • the touch sensor 1 includes an electrode pattern 14 for forming each of the transmitting electrode 11 and the receiving electrode 12.
  • the electrode pattern 14 is formed so that a plurality of cells 13 are adjacent to each other.
  • the electrode pattern 14 is periodically formed node by node.
  • FIG. 8 in order to clearly show the outer edge of the receiving electrode 12, the position corresponding to the outer edge of the receiving electrode 12 is shown by a virtual line.
  • each cell 13 consists of a thin wire 20 having conductivity.
  • the line width of each thin line 20 is, for example, 1 ⁇ m or more and 3 ⁇ m or less. Note that the specific configuration of the thin wire 20 will be described later.
  • Each cell 13 is formed such that the thin wire 20 is annular.
  • adjacent cells 13, 13 have thin lines 20, 20 that touch each other at one intersection, and a portion of each thin line 20 that corresponds to one intersection. It is configured to be curved.
  • each cell 13 is formed such that the thin wire 20 is in the shape of a perfect circle (that is, a complete circle). That is, each cell 13 has a curved shape formed so that all parts of the thin wire 20 have the same curvature.
  • Each cell 13 is configured such that the pitch interval P (see FIGS. 7, 8, and 10) of opposing portions of the thin wire 20 is in the range of 100 ⁇ m or more and 500 ⁇ m or less.
  • the pitch interval P corresponds to the diameter of a perfect circle forming each cell 13.
  • the receiving electrode 12 includes a dummy pattern 15.
  • the dummy pattern 15 is arranged inside each cell 13 constituting the receiving electrode 12 in plan view.
  • the position corresponding to the outer edge of the dummy pattern 15 is shown by a virtual line.
  • the dummy pattern 15 is composed of a plurality of thin lines 20.
  • the dummy pattern 15 is formed so that a plurality of cells 13 are adjacent to each other. Note that the pitch interval between the cells 13 that constitute the dummy pattern 15 is the same as the pitch interval P between the cells 13 that constitute the electrode pattern 14.
  • the dummy pattern 15 is electrically insulated from the electrode pattern 14. Specifically, the ends of each of the thin wires 20 that make up the dummy pattern 15 are spaced apart from the plurality of thin wires 20 that make up the electrode pattern 14 of the receiving electrode 12 . That is, each thin line 20 forming the dummy pattern 15 does not intersect with the plurality of thin lines 20 forming the electrode pattern 14 . Further, each thin wire 20 constituting the dummy pattern 15 is electrically insulated from an electrode connection portion 17, which will be described later.
  • a dummy electrode 16 is provided between the receiving electrodes 12, 12. Like the electrode pattern 14, the dummy electrode 16 is composed of a plurality of thin wires 20. The dummy electrode 16 is formed so that a plurality of cells 13 are adjacent to each other. Note that the pitch interval between the cells 13 constituting the dummy electrode 16 is the same as the pitch interval P between the cells 13, 13 constituting the electrode pattern 14.
  • the dummy electrode 16 is electrically insulated from each receiving electrode 12. Specifically, the ends of each of the thin wires 20 that make up the dummy electrode 16 are spaced from each of the thin wires 20 that make up the electrode pattern 14 of the receiving electrode 12 . That is, each thin line 20 forming the dummy electrode 16 does not intersect with the plurality of thin lines 20 forming the electrode pattern 14 . Further, each thin wire 20 constituting the dummy electrode 16 is electrically insulated from an electrode connecting portion 17, which will be described later.
  • Each of transmitting electrode 11 and receiving electrode 12 includes an electrode connection portion 17 .
  • the electrode connection portion 17 is made of a thin wire similar to the thin wire 20.
  • the electrode connecting portion 17 is arranged at the end of each of the transmitting electrode 11 and the receiving electrode 12.
  • the electrode connection portion 17 is electrically connected to a plurality of thin wires 20 that constitute the electrode pattern 14 .
  • the line width of the electrode connection portion 17 is thicker than the line width of the plurality of thin lines 20 forming the electrode pattern 14 .
  • Each thin wire 20 includes a conductive material embedded in each groove 6. As shown in FIG. 11, each thin wire 20 includes, for example, an adhesive layer 21, a conductive layer 22, a plating layer 23, and a blackening layer 24.
  • the adhesion layer 21 is an element for ensuring the adhesion of the conductive layer 22 to the groove 6.
  • the adhesion layer 21 has a function of making it difficult for the user to see the thin line 20 when viewed from the operation surface 2b side.
  • the adhesive layer 21 is, for example, a metal nitride or metal oxide containing at least one metal selected from the group consisting of Ti, Al, V, W, Ta, Si, Cr, Ag, Mo, Cu, and Zn. This is a metal layer composed of The adhesive layer 21 may be a single layer or a laminate including a plurality of layers having different compositions.
  • the adhesive layer 21 is laminated in the form of a thin film in the groove portion 6 by, for example, vapor deposition or sputtering.
  • the conductive layer 22 has a function of increasing the adhesion between the adhesive layer 21 and the plating layer 23.
  • the conductive layer 22 serves as a cathode for laminating a plating solution containing copper (Cu) or the like on the adhesive layer 21 in this embodiment, for example, during electroplating to form the plating layer 23.
  • functions as The conductive layer 22 is laminated in the form of a thin film on the adhesive layer 21 by, for example, vapor deposition or sputtering.
  • the plating layer 23 is formed, for example, by electroplating. When electroplating is performed, the conductive layer 22 and the plating layer 23 are integrally formed. As a result, the interface between the conductive layer 22 and the plating layer 23 cannot be determined.
  • the blackening layer 24 is laminated on the surface of the plating layer 23.
  • the blackened layer 24 is formed by replacing copper crystal grains located at boundaries between copper crystal grains located on the surface of the plating layer 23 with palladium (blackening treatment).
  • the thickness of the blackening layer 24 is, for example, 7 nm to 10 nm.
  • the blackening layer 24 has a function of making the thin line 20 less visible to the user when viewing from the operation surface 2b side.
  • the touch sensor 1 includes a plurality of wiring sections.
  • the plurality of wiring parts are elements for electrically connecting the plurality of transmitting electrodes 11 and the plurality of receiving electrodes 12 to an external circuit (the above-mentioned drive circuit and detection circuit) not shown.
  • Each wiring portion is made of a thin wire similar to the thin wire 20.
  • the plurality of wiring sections are composed of a plurality of first wiring sections 31 and a plurality of second wiring sections 32.
  • the plurality of first wiring parts 31 and the plurality of second wiring parts 32 are arranged outside the view area V (see FIG. 1).
  • the plurality of first wiring parts 31 and the plurality of second wiring parts 32 are arranged at positions overlapping with the decorative part 2a (see FIGS. 1 and 2) in a plan view from the operation surface 2b side. There is. That is, the plurality of first wiring parts 31 and the plurality of second wiring parts 32 are not visible from the operation surface 2b side due to the decoration part 2a.
  • the plurality of first wiring portions 31 are formed on the back surface of the substrate 3. One end of each first wiring section 31 is electrically connected to an end of each transmitting electrode 11 (that is, electrode connection section 17). The plurality of first wiring portions 31 are arranged such that the other end portions of each of the first wiring portions 31 are converged approximately at the center of the lower side of the substrate 3 .
  • the plurality of second wiring portions 32 are formed on the surface of the substrate 3. One end of each second wiring section 32 is electrically connected to an end of each receiving electrode 12 (that is, electrode connection section 17). The plurality of second wiring portions 32 are arranged such that the other end portions of each of the second wiring portions 32 are converged approximately at the center of the lower side of the substrate 3 .
  • each pad 33 is made of a thin wire similar to the thin wire 20.
  • the touch sensor 1 includes first and second ground portions 34 and 35 set to a ground potential.
  • the first and second ground sections 34 and 35 are electrically insulated from the plurality of electrodes and the plurality of wiring sections.
  • the first and second ground parts 34 and 35 are arranged outside the view area V (see FIG. 1). Specifically, the first and second ground parts 34 and 35 are arranged so as to surround the outer periphery of the view area V.
  • the first ground portion 34 is formed on the back surface of the substrate 3.
  • the first ground portion 34 is arranged at a position near the peripheral edge of the back surface of the substrate 3.
  • the above-mentioned pads 33, 33 are provided in the middle part of the first ground part 34 (the middle part located near the center of the lower side of the substrate 3).
  • the second ground portion 35 is formed on the surface of the substrate 3.
  • the second ground portion 35 is arranged at a position closer to the peripheral edge of the surface of the substrate 3.
  • Both ends of the first ground portion 34 are located near the center of the lower side of the substrate 3 .
  • the above-mentioned pads 33, 33 are provided at both ends of the first ground portion 34.
  • touch sensors that can be applied to smartphones etc. that are configured to be foldable depending on the usage situation, or touch sensors that can be applied to displays with curved operation screens.
  • Sensors that is, touch sensors fixed in a predetermined curved shape
  • stress tends to concentrate on a part of the substrate when the substrate constituting the touch sensor is bent or fixed in a predetermined curved shape.
  • adjacent cells 13, 13 in the electrode pattern 14 have thin lines 20, 20 that touch each other at one intersection, and each thin line 20 has one intersection.
  • the part corresponding to is curved.
  • each cell 13 of this embodiment is formed such that the thin wire 20 has a perfect ring shape. That is, at the one intersection point, the stress is difficult to concentrate due to the curved shape of the thin wire 20. With this configuration, the stress is dispersed at the one intersection point. As a result, cracks are less likely to occur in the portion corresponding to the one intersection of the thin wires 20. Therefore, in the electrode pattern 14, the portion corresponding to the one intersection of each thin line 20 can be made less likely to be disconnected.
  • the touch sensor 1 according to the embodiment of the present disclosure when the touch sensor 1 according to the embodiment of the present disclosure is applied to the above-mentioned smartphone or the like or a display, it becomes difficult for some of the thin wires 20 in the electrode pattern 14 to break. As a result, the resistance values of the transmitting electrode 11 and the receiving electrode 12 are stabilized, and the sensor sensitivity is also stabilized. Therefore, the touch sensor 1 according to the embodiment of the present disclosure can maintain good sensor sensitivity without causing malfunction even when applied to the above-mentioned smartphone or the like or a display.
  • each cell 13 is configured such that the pitch interval P of opposing portions of the thin wire 20 is in the range of 100 ⁇ m or more and 500 ⁇ m or less. According to this configuration, while maintaining each cell 13 constituted by the thin wires 20 at a predetermined size, when the user of the touch sensor 1 views from the operation surface 2b side, the thin wires 20 can be visually recognized from the operation surface 2b side. It becomes difficult to do. That is, "line visibility" can be prevented and the appearance of the touch sensor 1 can be improved.
  • each thin line 20 becomes difficult to visually recognize from the operation surface 2b side when the user of the touch sensor 1 views it from the operation surface 2b side. In other words, "line visibility" is prevented.
  • the pitch EP between the receiving electrodes 12, 12 is 3 mm or more and 7 mm or less.
  • the electrode width EW2 of the receiving electrode 12 is 0.5 mm or more and smaller than the pitch EP between the receiving electrodes 12, 12.
  • the spacing ES between the transmitting electrodes 11, 11 is 1 ⁇ m or more and 20 ⁇ m or less.
  • the interval between the transmitting electrodes 11, 11 and the interval between the receiving electrodes 12, 12 can also be visually recognized from the operation surface 2b side. It becomes difficult to do. As a result, the appearance of the touch sensor 1 can be improved.
  • the electrode pattern 14 is formed periodically in node units. According to this configuration, the shape in which the plurality of thin wires 20 forming the transmitting electrode 11 and the plurality of thin wires 20 forming the receiving electrode 12 overlap is uniform at all nodes. That is, the capacitance change of the node becomes uniform for all nodes. As a result, the sensor sensitivity of the touch sensor 1 can be stabilized.
  • the receiving electrode 12 includes a dummy pattern 15 that is electrically insulated from the plurality of thin wires 20 that constitute the receiving electrode 12.
  • This dummy pattern 15 can suppress an increase in the capacitance value of each receiving electrode 12. Further, by providing the dummy pattern 15, it becomes difficult for the user of the touch sensor 1 to distinguish between the plurality of thin lines 20 forming each receiving electrode 12 and the dummy pattern 15 when viewed from the operation surface 2b side. That is, the plurality of thin wires 20 constituting each receiving electrode 12 become less noticeable from the operation surface 2b side. As a result, the appearance of the touch sensor 1 can be improved.
  • a dummy electrode 16 that is electrically insulated from the receiving electrode 12 is provided between the receiving electrodes 12, 12.
  • This dummy electrode 16 can suppress an increase in the capacitance value of each receiving electrode 12 between adjacent receiving electrodes 12 , 12 .
  • each receiving electrode 12 becomes less noticeable when the user of the touch sensor 1 views it from the operation surface 2b side. As a result, the appearance of the touch sensor 1 can be improved.
  • each cell 13 has a form in which the thin wire 20 is formed in a perfect circular ring shape, but the present invention is not limited to this form.
  • each cell 13 may be formed such that the thin wire 20 has an elliptical ring shape. That is, in each cell 13 of this modification, all parts of the thin wire 20 are formed so that they do not have the same curvature.
  • each cell 13 may be configured as in Modification 2 shown in FIG. 13.
  • each cell 13 of Modification 2 is formed so that the thin wire 20 has a substantially rectangular (diamond-shaped in the illustrated example) annular shape.
  • the apexes of the quadrilateral are formed in a curved shape, and the adjacent cells 13, 13 are arranged such that the apex of the quadrilateral corresponds to the one intersection point.
  • the portion of the thin wire 20 corresponding to the one intersection point is curved.
  • a portion of each thin line 20 corresponding to the one intersection point (vertex of the quadrangle) has an R shape of R0.1 ⁇ m or more. Therefore, the stress is difficult to concentrate at the one intersection point. Therefore, in this modification as well, similarly to the embodiment described above, the portion of each thin wire 20 corresponding to the one intersection point is less likely to be disconnected.
  • the view area V may have, for example, a substantially circular shape or a polygonal shape such as a pentagonal shape when viewed from above.
  • the present invention is not limited to this form. That is, a configuration using two substrates may be used. Although not shown, two substrates may be used in which the second layer is laminated on the front or back surface of the first layer.
  • the substrate 3 has the first layer 4 and the second layer 5, but the present invention is not limited to this embodiment.
  • the substrate 3 may have only the first layer 4.
  • the direction from the left to the right in the paper of FIG. 3 is defined as the first direction X
  • the direction from the bottom to the top in the paper of FIG. 3 is defined as the second direction Y.
  • the direction from the bottom to the top in the paper of FIG. 3 may be defined as the first direction X
  • the direction from the left to the right in the paper of FIG. 3 may be defined as the second direction Y.
  • the extending direction of each transmitting electrode 11 is from the bottom to the top in the paper of FIG.
  • the extending direction of each receiving electrode 12 is from the left side to the right side in the paper of FIG.
  • the touch sensor 1 is shown with the cover member 2 and the flexible wiring board 8 attached to the substrate 3, but the present invention is not limited to this form. That is, the concept of the touch sensor 1 according to the present disclosure includes a state before the cover member 2, the flexible wiring board 8, and the like are attached to the substrate 3. Furthermore, the concept of the touch sensor 1 of the present disclosure includes each of the above-mentioned transmissions in an elongated base material (for example, an elongated hoop-shaped member not shown) in a state before the substrates 3 are individually formed. A configuration in which the electrode 11, each receiving electrode 12, each first wiring section 31, each second wiring section 32, and a plurality of pads 33 are formed on the base material is also included.
  • an elongated base material for example, an elongated hoop-shaped member not shown
  • the transmitting electrode 11 may include a dummy pattern similar to the dummy pattern 15 described in the above embodiment. That is, in the embodiment described above, a dummy pattern similar to the dummy pattern 15 may be arranged on the front surface side of the substrate 3 (on the visible side of the touch sensor 1). In this case, the dummy pattern on the transmitting electrode 11 side is composed of a plurality of thin lines (not shown) similarly to the dummy pattern 15 on the receiving electrode 12 side. Further, the dummy pattern on the transmitting electrode 11 side is arranged inside each cell 13 forming the transmitting electrode 11 in plan view.
  • the present invention is not limited to this form.
  • a dummy electrode (not shown) may be provided between the transmitting electrodes 11, 11. That is, in the embodiment described above, the dummy electrode may be arranged on the front surface side of the substrate 3 (on the visible side of the touch sensor 1).
  • the dummy electrode is composed of a plurality of thin wires (not shown) similarly to the dummy electrode 16 shown in FIG.
  • the plurality of transmitting electrodes 11, the plurality of first wiring parts 31, and the first grounding part 34 are provided on the back side of the substrate 3, while the plurality of receiving electrodes 12, the plurality of second wiring parts 32,
  • the second ground portion 35 is provided on the front surface side of the substrate 3, the embodiment is not limited to this embodiment.
  • a plurality of transmitting electrodes 11, a plurality of first wiring portions 31, and a first grounding portion 34 are provided on the front surface side of the substrate 3, while a plurality of receiving electrodes 12, a plurality of second wiring portions 32 are provided.
  • the second ground portion 35 may be provided on the back side of the substrate 3. Note that even with this configuration, each dummy pattern 15 and each dummy electrode 16 are arranged on the front surface side of the substrate 3 (on the visible side of the touch sensor 1).
  • the plating solution may contain silver, gold, or a copper alloy.
  • the touch sensor 1 to which the electrode pattern 14 of the present disclosure is applied is illustrated, but the present invention is not limited thereto.
  • the electrode pattern 14 of the present disclosure may be used in technical fields other than touch sensors (for example, liquid crystal display devices, organic electroluminescent display devices (OLED), micro LED display devices, solar cell devices, heater devices, antenna devices, electromagnetic wave shielding sheets). , conductive films, etc.).
  • the present disclosure can be used industrially as an electrode pattern and a touch sensor using the same.
  • touch sensor 2 cover member 3: substrate 11: transmitting electrode 12: receiving electrode 13: cell 14: electrode pattern 15: dummy pattern 16: dummy electrode 17: electrode connection part 20: thin wire 31: first wiring part 32: Second wiring section 33: Pad 34: First ground section 35: Second ground section

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Position Input By Displaying (AREA)
  • Switches That Are Operated By Magnetic Or Electric Fields (AREA)
  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)

Abstract

L'invention concerne un motif d'électrode (14) qui est formé de façon à adopter un état dans lequel une pluralité de cellules (13) sont adjacentes les unes aux autres. Chacune des cellules (13) est composée d'un fil mince conducteur (20) et est formée de telle sorte que le fil mince (20) a une forme annulaire. Les cellules mutuellement adjacentes (13), (13) sont conçues de telle sorte que des fils minces (20) des cellules sont en contact les uns avec les autres au niveau d'un point d'intersection, et dans les fils minces (20), des parties correspondant à un point d'intersection sont incurvées.
PCT/JP2023/020844 2022-06-29 2023-06-05 Motif d'électrode et capteur tactile l'utilisant WO2024004537A1 (fr)

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JP2022104528 2022-06-29
JP2022-104528 2022-06-29

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013131200A (ja) * 2011-12-21 2013-07-04 Samsung Electro-Mechanics Co Ltd タッチパネル及びその製造方法
JP2017097671A (ja) * 2015-11-25 2017-06-01 株式会社ジャパンディスプレイ 検出装置及び表示装置
WO2020149113A1 (fr) * 2019-01-17 2020-07-23 Ｊｘｔｇエネルギー株式会社 Film électroconducteur transparent

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013131200A (ja) * 2011-12-21 2013-07-04 Samsung Electro-Mechanics Co Ltd タッチパネル及びその製造方法
JP2017097671A (ja) * 2015-11-25 2017-06-01 株式会社ジャパンディスプレイ 検出装置及び表示装置
WO2020149113A1 (fr) * 2019-01-17 2020-07-23 Ｊｘｔｇエネルギー株式会社 Film électroconducteur transparent

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