WO2015083410A1 - Feuille conductrice et panneau tactile - Google Patents

Feuille conductrice et panneau tactile Download PDF

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Publication number
WO2015083410A1
WO2015083410A1 PCT/JP2014/074211 JP2014074211W WO2015083410A1 WO 2015083410 A1 WO2015083410 A1 WO 2015083410A1 JP 2014074211 W JP2014074211 W JP 2014074211W WO 2015083410 A1 WO2015083410 A1 WO 2015083410A1
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WIPO (PCT)
Prior art keywords
electrode
conductive sheet
auxiliary
conductive
conducting wire
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PCT/JP2014/074211
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English (en)
Japanese (ja)
Inventor
昌哉 中山
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富士フイルム株式会社
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Publication of WO2015083410A1 publication Critical patent/WO2015083410A1/fr

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    • 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
    • G06F3/0445—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means using two or more layers of sensing electrodes, e.g. using two layers of electrodes separated by a dielectric layer
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
    • G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
    • G06F2203/04112—Electrode mesh in capacitive digitiser: electrode for touch sensing is formed of a mesh of very fine, normally metallic, interconnected lines that are almost invisible to see. This provides a quite large but transparent electrode surface, without need for ITO or similar transparent conductive material

Definitions

  • the present invention relates to a conductive sheet and a touch panel including an electrode including a plurality of cells formed by intersecting thin conductive wires.
  • a touch panel is arrange
  • a position detection method in the touch panel for example, a resistance film method, a capacitance method, and the like are known.
  • the mutual capacitance method is a method in which the detection electrode detects that the fringe capacitance formed by the drive electrode and the detection electrode is changed between the detection electrodes by the finger.
  • Patent Document 1 discloses a touch panel having a drive electrode that can reduce the operating frequency, secure the number of integrations, reduce crosstalk, and realize high detection accuracy.
  • ITO indium tin oxide
  • Patent Document 2 a capacitive touch panel using a mesh electrode made of fine metal wires has been actively studied.
  • the present invention has been made to solve the above-described problems, and it is possible to improve the detection accuracy of the touch position without using a complicated electrode pattern even when a mesh electrode made of conductive thin wires is used.
  • An object is to provide a certain conductive sheet and a touch panel.
  • a conductive sheet comprising a substrate having a first main surface and a second main surface, and a first electrode pattern disposed on the first main surface of the substrate,
  • the first electrode pattern includes a first electrode including a plurality of first cells formed by intersecting first conductive thin wires, and an auxiliary lead electrically connected to the first electrode,
  • the first electrode extends along the first direction, and a plurality of rows are insulated and arranged in parallel along a second direction orthogonal to the first direction.
  • the auxiliary conducting wire has a configuration in which a part of the first conductive thin wire forming the first cell extends obliquely with respect to the second direction toward the first electrode in the adjacent row adjacent to the first electrode.
  • a conductive sheet in which the auxiliary conductor of the first electrode and the auxiliary conductor of the first electrode in the adjacent row are insulated from each other and face each other.
  • the touch panel using the conductive sheet having the first electrode pattern having the above-described configuration even if the finger contact position by the operator is a position of a gap between the first electrodes that is not normally detected because a fringe capacitance is not formed. Since the auxiliary conducting wire extending from the first conductive thin wire forming the first cell exists at the contact position, a fringe capacitance is formed between the first electrode and the first electrode adjacent thereto. This fringe capacitance can be detected. Therefore, the detection accuracy of the touch position is improved.
  • the auxiliary conductive wires protruding from the first electrode in an arbitrary row and the auxiliary conductive wires protruding from the first electrode adjacent to the first electrode are included in the same degree. Is preferred. In this case, the detection accuracy of the touch position is further improved.
  • Cross conductors electrically connected to the auxiliary conductors, and the cross conductors of the first electrode auxiliary conductors and the cross conductors of the first electrode auxiliary conductors in adjacent rows are alternately arranged [1] ] To [3] conductive sheet.
  • the auxiliary conductor since the auxiliary conductor has a cross conductor, the resistance of the auxiliary conductor is reduced and the sensitivity of the touch panel is improved. Furthermore, since the cross conducting wires of the adjacent first electrodes are alternately arranged, the position accuracy of the touch position is further improved.
  • a dummy line is formed between the first electrode and the first electrode in the adjacent row, and a dummy cell having the same shape as the first cell is formed by the dummy line and the auxiliary conducting wire.
  • Conductive sheet is formed between the first electrode and the first electrode in the adjacent row, and a dummy cell having the same shape as the first cell is formed by the dummy line and the auxiliary conducting wire.
  • the second electrode pattern includes a first electrode pattern and a second electrode pattern disposed via an insulating material, and the second electrode pattern includes a second cell formed by crossing second conductive thin wires. Including a plurality of second electrodes, The conductive sheet according to any one of [1] to [8], wherein the second electrode extends along the second direction, and a plurality of rows are insulated and juxtaposed along the first direction.
  • the second electrode pattern is formed via the first electrode pattern and the insulating material. This configuration effectively functions as a capacitive touch panel.
  • a second electrode pattern disposed on the second main surface of the substrate is provided, and the second electrode pattern includes a plurality of second cells formed by intersecting second conductive thin wires. Including two electrodes, The conductive sheet according to any one of [1] to [8], wherein the second electrode extends along the second direction, and a plurality of rows are insulated and juxtaposed along the first direction.
  • the second electrode pattern may be formed on the back side of the substrate on which the first electrode pattern is formed.
  • the present invention is a capacitive touch panel having the conductive sheet configured as described above.
  • the present invention is a touch panel using the conductive sheet of [9] or [10], wherein the first electrode is a drive electrode and the second electrode is a detection electrode.
  • FIG. 1 is an exploded perspective view of a main part of a display device 108 including a touch panel 100 using the first conductive sheet 10A of the present invention according to the present embodiment.
  • the touch panel 100 will be described first.
  • the touch panel 100 includes a sensor body 102 and a control circuit (IC circuit or the like) (not shown).
  • the sensor body 102 includes a laminated conductive sheet 12 formed by laminating a first conductive sheet 10A and a second conductive sheet 10B in this order from below, and a cover lens 106 laminated on the second conductive sheet 10B.
  • a laminated conductive sheet 12 formed by laminating a first conductive sheet 10A and a second conductive sheet 10B in this order from below, and a cover lens 106 laminated on the second conductive sheet 10B.
  • the first conductive sheet 10A, the second conductive sheet 10B, and the cover lens 106 are laminated from below.
  • the sensor body 102 (the laminated conductive sheet 12 and the cover lens 106) is disposed on the display panel 110 in the display device 108, and constitutes a liquid crystal display, for example.
  • the sensor unit 112 at the touch position arranged in the area corresponding to the display screen 110 a of the display panel 110 and the terminal arranged in the area corresponding to the outer peripheral part of the display panel 110.
  • a wiring portion 114 (so-called frame).
  • the first conductive sheet 10A includes a first electrode pattern 116A having first electrodes 18A1 to 18An formed on one main surface (first main surface) of an insulating first transparent substrate 14A (substrate).
  • the second conductive sheet 10B includes a second electrode pattern 116B having second electrodes 18B1 to 18Bn formed on one main surface of the insulating second transparent base 14B.
  • the thickness of the first transparent substrate 14A and the second transparent substrate 14B is preferably 20 to 700 ⁇ m or less, more preferably 30 to 300 ⁇ m, and 40 to 200 ⁇ m is particularly preferable from the viewpoint of achieving both thinning and sensitivity of the touch panel.
  • Examples of the first transparent substrate 14A and the second transparent substrate 14B include insulating substrates such as a plastic film, a plastic plate, and a glass plate.
  • plastic film and the plastic plate examples include polyesters such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN); polyolefins such as polyethylene (PE), polypropylene (PP), polystyrene, and polyethylene vinyl acetate (EVA). Vinyl resin; in addition, polycarbonate (PC), polyamide, polyimide, acrylic resin, triacetyl cellulose (TAC), cycloolefin polymer (COP), cyclic olefin copolymer (COC), and the like can be used.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • PE polyethylene
  • PP polypropylene
  • EVA polystyrene
  • EVA polyethylene vinyl acetate
  • Vinyl resin in addition, polycarbonate (PC), polyamide, polyimide, acrylic resin, triacetyl cellulose (TAC), cycloolefin polymer (COP), cyclic olefin copolymer (C
  • PET is particularly preferable from the viewpoints of light transmittance and workability. Since the conductive films such as the first conductive sheet 10A and the second conductive sheet 10B used for the laminated conductive sheet 12 are required to be transparent, the transparency of the first transparent base 14A and the second transparent base 14B is high. Is preferred.
  • the transparent substrate has an undercoat layer that enhances adhesion as needed, an optical filter layer that absorbs light of a specific wavelength to prevent halation, an antistatic layer, and a refractive index adjustment layer that improves transmittance.
  • an optical filter layer that absorbs light of a specific wavelength to prevent halation
  • an antistatic layer that prevents halation
  • a refractive index adjustment layer that improves transmittance.
  • other functional layers may be provided.
  • the first electrodes 18A1 to 18An each have a plurality of strip-shaped (bar-shaped) patterns extending in the first direction (x direction) as shown in FIG.
  • the first electrode 18A1 has a predetermined electrode width Wd that extends in the second direction (direction perpendicular to the first direction: y direction).
  • the first electrode 18A1 is formed by intersecting first conductive thin wires 20A1 made of a metal such as silver, copper, gold, aluminum, molybdenum, or an alloy containing one or more of these metals. With this intersection, a plurality of spaces surrounded by the first conductive thin wires 20A1, that is, the first cells 22A1 are formed.
  • the first conductive thin wire 20A1 is preferably a low-resistance metal such as silver, copper, gold, or aluminum, or an alloy thereof, and silver and a silver alloy are particularly preferable from the viewpoint of resistance. From the viewpoint of resistance and flatness, the thickness of the first conductive thin wire 20A1 is preferably 0.1 ⁇ m to 3 ⁇ m.
  • a protective film made of an organic material or an inorganic material may be provided on the first conductive thin wire 20A.
  • the organic material include acrylic resin and gelatin
  • examples of the inorganic material include a silicon oxide film, a silicon nitride film, and an aluminum oxide film.
  • Such a protective film has effects such as preventing oxidation and migration of the first conductive thin wire 20A.
  • a blackening layer may be provided on the first conductive thin wire 20A or on the side surface. By providing the blackened layer, the effect of suppressing the appearance of the thin line can be obtained even if a metal having a high reflectance is used for the first conductive thin line 20A.
  • a metal oxide film, a metal sulfide film, chromium, carbon or the like can be used as the blackening film.
  • the shape of the first cell 22A1 is not particularly limited, but is preferably a square, rhombus, or regular hexagon. Among them, the first cell 22A1 is particularly preferably a rhombus as shown in FIG. That is, the first electrode 18A1 is formed in a mesh shape in which a plurality of rhombic first cells 22A1 are connected.
  • the opening ratio of the first cell 22A1 (the area ratio of the opening occupying the cell) is preferably as large as possible because the transmittance of the conductive sheet is high.
  • the sheet resistance of the first electrode increases accordingly. Therefore, the preferable range of the aperture ratio is 92% to 99%. Further, the sheet resistance of the first electrode is preferably 100 ⁇ / ⁇ or less, more preferably 50 ⁇ / ⁇ or less.
  • the transmittance of the conductive sheet is 80% or more, and particularly preferably 85% or more.
  • the width direction dimension (line width) of the first conductive thin wire 20A1 is 20 ⁇ m or less, more preferably 1 ⁇ m or more and 5 ⁇ m or less, and still more preferably 1 ⁇ m or more and 3 ⁇ m or less.
  • the moire of the conductive pattern by the first conductive thin wire 20A1 and the appearance of the thin line are improved, and the visibility is improved (that is, the first conductive thin wire 20A1 forming the first electrode 18A1 is hardly visible).
  • the line width of the first conductive thin wire 20A1 is preferably 1 ⁇ m or more.
  • the first cell 22A1 has a rhombus shape having two obtuse angles and two acute angles from the viewpoint of reducing moire with the pixels of the display device. That is, the obtuse crossing angle ⁇ 1 in a diagonal relationship is the same angle exceeding 90 °, and the acute crossing angle ⁇ 1 is the same angle less than 90 °.
  • the angle of the rhombus in the y direction is ⁇ 1
  • the angle of the rhombus in the x direction is ⁇ 1, but this may be reversed.
  • the crossing angle ⁇ 1 forming an acute angle is preferably 80 ° or less. In this case, it is effective in reducing moire. However, moire tends to occur even when the acute angle is excessively small. In order to avoid this, it is preferable that the crossing angle ⁇ 1 is in the range of 45 ° to 80 °, and more preferably in the range of 60 ° to 80 °, because it is effective in reducing moire.
  • the distance between adjacent first cells 22A1 and 22A1 that is, the cell pitch P (the distance between the centers of gravity of adjacent cells) that is the distance from the inside of one first cell 22A1 to the outside of the adjacent first cell 22A1. ) Is preferably 50 ⁇ m to 1000 ⁇ m. Setting the cell pitch P in this way is effective in reducing the appearance of moire and fine lines. A more preferable range of the cell pitch P is 100 ⁇ m to 500 ⁇ m.
  • first electrodes 18A2 to 18An are configured in the same manner as the first electrode 18A1 by the first cells 22A2 to 22An formed from the first conductive thin wires 20A2 to 20An. That is, on one main surface of the first transparent substrate 14A, first electrodes 18A1 to 18An having an n-row (plurality of rows) mesh shape formed by connecting a plurality of first cells 22A1 to 22An are provided. They are insulated and arranged in parallel along two directions (see FIG. 2).
  • FIG. 4 is an enlarged plan view of a main part showing only the first electrodes 18A1 and 18A2 adjacent to each other among the first electrodes 18A1 to 18An.
  • the first electrode 18A1 is represented by a thick solid line and the first electrode 18A2 is represented by a thin solid line.
  • two imaginary lines are shown in FIG. 4 in order to make it easy to grasp the position of the first electrode 18A1 end of the first electrode 18A1 and the position of the first electrode 18A2 on the first electrode 18A1 side. However, such a line does not exist in the actual first electrodes 18A1 and 18A2.
  • the first electrodes 18A1 and 18A2 are respectively formed as mesh electrodes by connecting the plurality of first cells 22A1 and 22A2 as described above.
  • the first conductive thin wire 20A1 protrudes from the first electrode 18A1 in the first row to form a first auxiliary conducting wire 50a.
  • the first auxiliary conductor 50a extends obliquely with respect to the second direction toward the first electrode 18A2 in the second row.
  • the first conductive thin wire 20A2 protrudes from the first electrode 18A2 in the second row to form the second auxiliary conducting wire 50b.
  • the second auxiliary conductor 50b is directed to the first electrode 18A1 in the first row and extends obliquely with respect to the second direction.
  • the second auxiliary lead wire 50b protruding from the first electrode 18A2 also protrudes from one side of the rhombus of the first cell 22A2.
  • the second auxiliary conducting wire 50b protruding from the first cell 22A2 extends toward one side of the rhombus of the first cell 22A1 forming the first electrode 18A1 (first electrode in the first row).
  • the second auxiliary conducting wire 50b does not reach the first cell 22A1 of the first electrode 18A1, but is separated and insulated at a predetermined interval.
  • first auxiliary conducting wire 50a and the second auxiliary conducting wire 50b adjacent to the first auxiliary conducting wire 50a are separated from each other at a predetermined interval to avoid a short circuit and are in a parallel relationship.
  • first auxiliary conducting wire 50a intersects with a first intersecting conducting wire 52a extending in a direction different from the extending direction of the first auxiliary conducting wire 50a.
  • the first intersecting conductor 52a is cut at a location (disconnected portion) that intersects the second auxiliary conductor 50b in order to avoid contact with the second auxiliary conductor 50b.
  • the second auxiliary conducting wire 50b intersects with the second intersecting conducting wire 52b extending in a direction different from the extending direction of the second auxiliary conducting wire 50b.
  • the second intersecting conductor 52b is cut at a location (disconnected portion) intersecting the first auxiliary conductor 50a so as to avoid contact with the first auxiliary conductor 50a.
  • the length of the disconnected portion is preferably 5 to 50 ⁇ m, and particularly preferably 10 to 30 ⁇ m from the viewpoint of achieving both insulation and visibility. If the length of the disconnected portion is less than 5 ⁇ m, a problem occurs in insulation, and if it exceeds 50 ⁇ m, the problem that the disconnected portion is easily recognized is remarkably generated.
  • the disconnection portion is not particularly specified for the purpose of insulation, and may be provided at the intersection or the midpoint of the line. However, if the disconnection portions are aligned, it becomes easy to see the disconnection portion, which causes a problem in terms of visibility. Therefore, it is preferable to provide the disconnected portion so as not to be in a straight line as shown in FIG.
  • the first auxiliary conducting wire 50a, the first intersecting conducting wire 52a, the second auxiliary conducting wire 50b, and the second intersecting conducting wire 52b form a dummy cell 53A having a disconnected portion.
  • the dummy cell 53A has the same shape as the first cells 22A1 and 22A2.
  • the same shape means that the first cells 22A1 and 22A2 have the same shape (the length and angle of the side of the cell are the same) in the dummy cell 53A with the disconnected portion extrapolated.
  • the angle ⁇ (takes an acute angle) between the extending direction of the first auxiliary conductor 50a and the first direction is preferably 20 ° to 70 °.
  • the angle ⁇ is more preferably 30 ° to 60 °, in particular, because the positional accuracy and sensitivity of the touch panel can be remarkably improved.
  • the first auxiliary conductor 50a and the first electrode 18A1 are connected by two first conductive thin wires 20A1 as indicated by reference numeral 60 in FIG. It is preferable to connect the plurality of first conductive thin wires 20A1 because redundancy against disconnection increases. Similarly, the second auxiliary conductor 50b and the first electrode 18A2 are connected by two first conductive thin wires 20A2.
  • intersection of the first auxiliary conductor 50a and the first intersection conductor 52a is a position surrounded by four intersections of the second auxiliary conductor 50b and the second intersection conductor 52b. Further, the intersection of the second auxiliary conductor 50b and the second intersection conductor 52b is a position surrounded by four intersections of the first auxiliary conductor 50a and the first intersection conductor 52a.
  • the obtuse angle ⁇ 2 and the acute angle ⁇ 2 of the first auxiliary conductor 50a and the first intersecting conductor 52a are set equal to the obtuse angle ⁇ 1 and the acute angle ⁇ 1 of the first cells 22A1 and 22A2. Is preferred.
  • the first auxiliary conductor 50a can be formed, for example, by continuously extending the first conductive thin wire 20A1 from one side of the first cell 22A1 when forming the first electrode 18A1.
  • the first cross conductor 52a can be formed by, for example, intermittently extending the first conductive thin wire 20A1 from one side of the first cell 22A1 when forming the first electrode 18A1.
  • the second auxiliary conductor 50b can be formed, for example, by extending the first conductive thin wire 20A2 continuously from one side of the first cell 22A2 when forming the first electrode 18A2.
  • the second cross conductive wire 52b can be formed by intermittently extending the first conductive thin wire 20A2 from one side of the first cell 22A2.
  • the relationship between the electrode width (width dimension along the arrow y direction in FIG. 2) Wd of the first electrodes 18A1 to 18An and the interval width Wk between the adjacent first electrodes is (1/2) ⁇ Wd
  • the relationship of ⁇ Wk ⁇ Wd is preferable because the positional accuracy of the touch panel can be further increased.
  • a preferable range of Wd is 3 to 6 mm.
  • first electrode 18A2 and the first electrode 18A3 adjacent thereto are similarly configured (see FIG. 2). The same applies to the remaining first electrodes adjacent to each other.
  • each of the first electrodes 18A1 to 18An is electrically connected to the first terminal wiring pattern 42a by the first conductive thin wires 20A1 to 20An via the first connection portion 40a. It is connected.
  • the first connection portion 40a and the first terminal wiring pattern 42a are preferably formed simultaneously with the first electrodes 18A1 to 18An using the same material as the first conductive thin wires 20A1 to 20An. With this configuration, the process can be omitted.
  • FIG. 5 shows a configuration having a dummy line 70 electrically insulated from the first electrodes 18A1 and 18A2 between the first electrodes 18A1 and 18A2.
  • the dummy wire 70 forms a dummy cell 53B having a disconnected portion together with the first auxiliary conductor 50a and the second auxiliary conductor 50b.
  • the dummy cell 53B has the same shape as the first cells 22A1 and 22A2.
  • the same shape means that the first cells 22A1 and 22A2 have the same shape in the dummy cell 53B with the disconnected portion extrapolated.
  • FIG. 6 shows a shape in which the first auxiliary conductor 50a and the second auxiliary conductor 50b are each paired with two auxiliary conductors.
  • the first auxiliary conductor 50a pair and the second auxiliary conductor 50b pair that are paired with the two auxiliary conductors of FIG. 6 have a first intersecting conductor 52a and a second intersecting conductor 52b that are electrically connected to each other.
  • the first auxiliary conductor 50a and the second auxiliary conductor 50b are in a straight line shape, but may be a so-called zigzag line having a refracting portion as shown in FIG.
  • the angle ⁇ at this time is an angle between a straight line connecting the start point and the end point of the first auxiliary conductor 50a and the second auxiliary conductor 50b as shown in FIG. 7 also has a dummy line 70, and a dummy cell 53B is formed by the dummy line 70, the first auxiliary conducting wire 50a, the second auxiliary conducting wire 50b, the first intersecting conducting wire 52a, and the second intersecting conducting wire 52b.
  • the cell is a diamond shape, but the cell may be a regular hexagon as shown in FIG.
  • the angle ⁇ at this time is an angle formed by the starting points of the first auxiliary conducting wire 50a and the second auxiliary conducting wire 50b and the extending direction of the first electrode 18A1, as shown in FIG.
  • the second electrodes 18B1 to 18Bn formed on one main surface of the second transparent substrate 14B (see FIG. 3) constituting the second conductive sheet 10B are each in the second direction (y A plurality of strip-shaped (bar-shaped) patterns extending in the direction).
  • the plurality of second electrodes 18B1 to 18Bn are arranged along the first direction (x direction). That is, in the laminated conductive sheet 12, as shown in FIG. 3, the first electrodes 18A1 to 18An and the second electrodes 18B1 to 18Bn face each other through the insulating first transparent base 14A.
  • Each of the second electrodes 18B1 to 18Bn is not particularly limited, but it is preferable that the second electrodes 18B1 to 18An are formed by intersecting the second conductive thin wires 20B as in the case of the first electrodes 18A1 to 18An. Along with this intersection, spaces surrounded by the second conductive thin wires 20B, that is, the second cells 22B1 to 22Bn are formed.
  • the shape of the second cells 22B1 to 22Bn is not particularly limited, and is preferably a square, rhombus, or regular hexagon, and may be a random shape.
  • the second cells 22B1 to 22Bn are particularly preferably substantially the same shape and size as the first cells 22A1 to 22An, and the rhombus is particularly preferable like the first cells 22A1 to 22An. That is, each of the second electrodes 18B1 to 18Bn is formed by mesh formation in which a plurality of rhombic second cells 22B1 to 22Bn are connected. Then, n rows (a plurality of rows) of second electrodes 18B1 to 18Bn are insulated and arranged in parallel along the first direction.
  • the second conductive thin wire 20B1 is preferably a low-resistance metal such as silver, copper, gold, or aluminum, or an alloy thereof, like the first conductive thin wire 20A1, and silver and a silver alloy are particularly preferable from the viewpoint of resistance. preferable. From the viewpoint of resistance and flatness, the film thickness of the second conductive thin wire 20B1 is preferably 0.1 ⁇ m to 3 ⁇ m.
  • a protective film may be provided on the second conductive thin wire 20B1.
  • the protective film has effects such as oxidation prevention and migration prevention of the second conductive thin wire 20B1.
  • a blackening layer may be provided on the second conductive thin wire 20B1 or on the side surface.
  • a metal having a high reflectance is used as the second conductive thin wire 20B1
  • an effect of suppressing the appearance of the thin wire is obtained.
  • the blackening film a metal oxide film, a metal sulfide film, chromium, carbon or the like can be used.
  • the opening ratio of the second cell 22B1 is preferably as large as possible because the transmittance of the second conductive sheet 10B is high, but the sheet resistance of the second electrode is increased accordingly. Therefore, the preferable range of the aperture ratio is 92% to 99%.
  • the sheet resistance of the second electrode is preferably 100 ⁇ / ⁇ or less, more preferably 50 ⁇ / ⁇ or less.
  • the transmittance of the second conductive sheet 10B is 80% or more, and particularly preferably 85% or more.
  • the width direction dimension (line width) of the second conductive thin wire 20B1 is 20 ⁇ m or less, more preferably 1 ⁇ m or more and 5 ⁇ m or less, and still more preferably 1 ⁇ m or more and 3 ⁇ m or less.
  • the moire of the conductive pattern by the second conductive thin wire 20B1 and the appearance of the thin wire are improved, and the visibility is improved (that is, the second conductive thin wire 20B1 forming the second electrode 18B1 is hardly visible).
  • the line width of the second conductive thin wire 20B1 is preferably 1 ⁇ m or more.
  • the dummy line forms a dummy cell having a disconnection portion, and the dummy cell has the same shape as the second cell 22B, like the dummy cell 53B.
  • the first cells 22A1 to 22An and the second cells 22B1 to 22Bn have the same shape
  • the first cells 22A1 to 22An and the second cells 22B1 are stacked when the first conductive sheet 10A and the second conductive sheet 10B are stacked.
  • To 22Bn are preferably shifted by 1/2 pitch (the centers of the second cells 22B1 to 22Bn are aligned with the central portions of the first cells 22A1 to 22An).
  • the disconnection portions of the first conductive sheet 10A and the second conductive sheet 10B are provided at the midpoint of the side of the cell. This is because it becomes difficult to see the disconnection portion.
  • the electrode width (width dimension along the arrow x direction in FIG. 2) Ws of the second electrodes 18B1 to 18Bn is the electrode width (width dimension along the arrow y direction in FIG. 2) Wd of the first electrodes 18A1 to 18An.
  • the electrode width Wd and the electrode width Ws may be set smaller than the above.
  • the second electrodes 18B1 to 18Bn may have a shape having an opening (insulating portion) inside the electrode as disclosed in FIGS. 5 and 12 of JP2013-149236A. By using the second electrodes 18B1 to 18Bn having such a shape, the sensitivity of the touch panel can be further improved.
  • one end of the second electrode 18B1 is electrically connected to the second terminal wiring pattern 42b by the second conductive thin wire 20B1 via the second connection portion 40b.
  • the second connection portion 40b and the second terminal wiring pattern 42b are preferably formed simultaneously with the second electrodes 18B1 to 18Bn with the same material as the second conductive thin wire 20B1. With this configuration, the process can be omitted.
  • a plurality of first terminals 116 a are arranged at the peripheral portion on one long side of the first conductive sheet 10 ⁇ / b> A in the central portion in the length direction. Are arranged in the length direction.
  • a part (for example, odd number) of the plurality of first connection portions 40a is linearly arranged along one short side (y direction) of the sensor unit 112, and the other short side (y direction) of the sensor unit 112. ),
  • a part (for example, even number) of the plurality of first connection portions 40a is linearly arranged.
  • the outer shape of the second conductive sheet 10B has a rectangular shape as viewed from above, and the outer shape of the sensor unit 112 also has a rectangular shape.
  • the terminal wiring portions 114 a plurality of second terminals 116b are arranged in the lengthwise central portion of the peripheral portion on the one long side of the second conductive sheet 10B in the length direction of the one long side. Is formed.
  • a plurality of second connection portions 40b are linearly arranged along one long side (x direction) of the sensor portion 112.
  • the second terminal wiring pattern 42b derived from each second connection portion 40b is routed toward the substantially central portion of one long side of the second conductive sheet 10B, and is electrically connected to the corresponding second terminal 116b. It is connected.
  • the derivation form of the first terminal wiring pattern 42a may be the same as the second terminal wiring pattern 42b described above. Conversely, the derivation form of the second terminal wiring pattern 42b is the same as the first terminal wiring pattern 42a described above. The same may be applied.
  • the area of the terminal wiring part 114 of the touch panel 100 is required to be small. For this reason, the minimum line width (line) and the minimum line space (space) in the first terminal wiring pattern 42a and the second terminal wiring pattern 42b are required. Is preferably 5 to 50 ⁇ m.
  • the laminated conductive sheet 12 is configured by laminating a second conductive sheet 10B on a first conductive sheet 10A.
  • an insulating material is used as an adhesive between the upper end surface of the first conductive sheet 10A (that is, on the first electrodes 18A1 to 18An and the first transparent base 14A) and the lower end surface of the second conductive sheet 10B.
  • An optical adhesive sheet (also referred to as OCA) 30 is disposed.
  • OCA30 one having a thickness of 10 to 200 ⁇ m is preferably used.
  • a specific example of the OCA 30 is OCA tape # 8146 manufactured by 3M.
  • the preferable transmittance of the sensor unit 112 of the laminated conductive sheet 12 is 70% or more, particularly preferably 80% or more, and the haze is 5.0% or less, particularly 2.0% or less. Is preferred.
  • the cover lens 106 is formed on the second conductive sheet 10B.
  • a transparent glass substrate such as chemically strengthened glass, a sapphire substrate, or a transparent plastic substrate such as PMMA or PC is used.
  • the thickness of the cover lens 106 is preferably 0.1 to 1.1 mm.
  • the cover lens 106 may be provided with a decorative layer at the non-display portion position with black ink or the like.
  • an optical adhesive sheet (OCA) 30 is disposed as an adhesive between the upper end surface of the second conductive sheet 10B and the lower end surface of the cover lens 106.
  • the first terminal wiring pattern 42a derived from the multiple first electrodes 18A1 to 18An of the first conductive sheet 10A and the second terminal wiring derived from the multiple second electrodes 18B1 to 18Bn of the second conductive sheet 10B.
  • the pattern 42b is connected to a control circuit that controls scanning so that the first electrodes 18A1 to 18An function as drive electrodes and the second electrodes 18B1 to 18Bn function as detection electrodes.
  • the operator touches a predetermined position of the touch panel 100 with a finger from the cover lens 106.
  • the touch panel for example, there is no auxiliary conducting wire between the first electrodes 18A1 and 18A2. Therefore, when the contact location is between the first electrodes 18A1 and 18A2, the fringe capacitance from the first electrode that is the drive electrode is not formed at the contact location and cannot be sensed. In such a case, although contact is made, it is recognized that “contact is not made”, or another place is recognized as being touched, and as a result, the operator is in a position intended by the operator. I could't touch it.
  • the first auxiliary conductor 50a and the second auxiliary conductor are disposed between the adjacent ones of the first electrodes 18A1 to 18An. 50b, the 1st crossing conducting wire 52a and the 2nd crossing conducting wire 52b are formed (refer FIG.2 and FIG.4).
  • the first auxiliary conductor 50a electrically connected to the first electrode 18A1 and the first intersection A contact can be detected by forming a fringe capacitance from the conducting wire 52a and from the second auxiliary conducting wire 50b and the second intersecting conducting wire 52b connected to the adjacent first electrode 18A2, and detecting the change thereof.
  • the fringe capacitance from the first auxiliary conducting wire 50a and the first intersecting conducting wire 52a and from the second auxiliary conducting wire 50b and the second intersecting conducting wire 52b is the first electrode 18A2 adjacent to the electrically connected first electrode 18A1.
  • the capacitance change (contact) can be detected by driving either the first electrode 18A1 or the first electrode 18A2 adjacent thereto. Of course, the same phenomenon occurs between the remaining adjacent ones, such as between the first electrode 18A2 and the first electrode 18A3.
  • the touch panel 100 using the laminated conductive sheet 12 of the present invention can detect even the gap between the first electrodes that could not be detected conventionally, the position accuracy of the touch position can be made high.
  • the first electrodes 18A1 to 18An, the first auxiliary conducting wire 50a, the second auxiliary conducting wire 50b, the first intersecting conducting wire 52a, the second intersecting conducting wire 52b, and the second electrodes 18B1 to 18Bn are obtained in order to obtain a pattern having a narrow line width.
  • it can be formed by a photolithographic etching method, a method in which a resin having a groove is formed on a substrate and a conductive ink is applied to the groove, a microcontact printing patterning method, or a silver salt method.
  • a silver salt method that can simplify the process is more preferable.
  • microcontact printing patterning method is described in detail in paragraph ⁇ 0104> of JP-T-2012-519329.
  • a pattern of first conductive fine wires 20A1 to 20An and second conductive thin wires 20B1 to 20Bn having a mesh shape is obtained by exposing and developing a photosensitive material having a photosensitive silver salt-containing layer. Is. Specific operations thereof are described in detail in paragraphs ⁇ 0163> to ⁇ 0280> of JP2009-4348A.
  • the present invention is not particularly limited to the above-described embodiment, and various modifications can be made without departing from the gist of the present invention.
  • the above-described embodiment is preferable from the viewpoint of the sensitivity of the touch panel.
  • the positional relationship between the first conductive sheet 10A and the second conductive sheet 10B in FIGS. ) To cover lens 106 / first conductive sheet 10A / second conductive sheet 10B may be configured in this order.
  • an insulating adhesive is provided on the surface of the first conductive thin wire 20A1 of the first conductive sheet 10A and is bonded to the surface of the second transparent substrate 14B of the second conductive sheet 10B.
  • OCA insulating adhesive
  • the first conductive thin wire 20A1 surface and the second conductive thin wire 20B1 surface are bonded to each other with an insulating adhesive (OCA), and the first transparent substrate 14A surface and the second transparent substrate 14B surface are insulated.
  • OCA insulating adhesive
  • first electrode pattern 116A and the second electrode pattern 116B may be configured to face each other with an insulating material interposed therebetween.
  • both the first electrode and the second electrode may have the pattern shown in FIG. That is, in this case, the first auxiliary conducting wire 50a, the second auxiliary conducting wire 50b, the first intersecting conducting wire 52a, and the second intersecting conducting wire 52b are formed between the adjacent electrodes in both the first electrode and the second electrode.
  • first auxiliary conducting wire 50a the second auxiliary conducting wire 50b, the first intersecting conducting wire 52a, and the second intersecting conducting wire 52b at all between adjacent first electrodes in the first electrode pattern.
  • the first electrode in any one row (arbitrary row) and the first electrode in a row (adjacent row) adjacent thereto may be formed.
  • first auxiliary conducting wire 50a the second auxiliary conducting wire 50b, the first intersecting conducting wire 52a, and the second intersecting conducting wire 52b
  • present invention includes only the first auxiliary conducting wire 50a and the second auxiliary conducting wire 50b. The effect will occur.
  • a configuration in which a dummy line is provided between the electrodes may be used.
  • the laminated conductive sheet 12 is formed by forming the first electrodes 18A1 to 18An on one main surface of the first transparent substrate 14A and forming the second electrodes 18B1 to 18Bn on one main surface of the second transparent substrate 14B. It is not limited to a thing (refer FIG.2 and FIG.3). That is, as shown in FIG. 9, the first electrodes 18A1 to 18An are formed on one main surface of the first transparent substrate 14A, and the second main surface (second main surface) of the first transparent substrate 14A is second. The electrodes 18B1 to 18Bn may be formed. In this case, the second transparent substrate 14B does not exist, the first transparent substrate 14A is stacked on the second electrodes 18B1 to 18Bn, and the first electrodes 18A1 to 18An are stacked on the first transparent substrate 14A. .
  • the use of the laminated conductive sheet 12 having this configuration is suitable for a touch panel because the touch panel can be reduced in thickness, cost, and reliability.
  • the laminated conductive sheet 12 having this configuration can be manufactured using, for example, a method disclosed in Examples of Japanese Patent Application Laid-Open No. 2012-6377.
  • the cover lens 106 is affixed on the second electrodes 18B1 to 18Bn using OCA and is configured as the touch panel 100.
  • the cover lens 106 may be configured to be pasted on the first electrodes 18A1 to 18An using OCA.
  • the cover lens 106 uses OCA on the second electrodes 18B1 to 18Bn. The structure that is pasted is more preferable.
  • the first electrode and the second electrode are bar-shaped (strip-shaped), but of course, diamond having a diamond-shaped sensing electrode A pattern shape and other known electrode pattern shapes are also applicable.
  • the optical adhesive sheet (OCA30) has been described as the adhesive, but other adhesives such as a transparent adhesive liquid (OCR) that is cured by ultraviolet rays can also be used.
  • OCR transparent adhesive liquid

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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)

Abstract

La présente invention concerne un panneau tactile équipé d'une feuille conductrice qui utilise des électrodes formées de mailles, la précision de détection de positions de toucher étant facilement améliorée sans utiliser de motifs complexes d'électrodes. Parmi des premières électrodes (18A1-18An) formées de mailles, un premier fil conducteur mince (20A1) (premier fil conducteur auxiliaire (50a)) qui s'étend, par exemple, vers la première électrode (18A2) adjacente à la première électrode (18A1) fait saillie à partir de la première électrode (18A1). Dans le même temps, un premier fil conducteur mince (20A2) (second fil conducteur auxiliaire (50b)) qui s'étend vers la première électrode (18A1) fait saillie à partir de la première électrode (18A2). Le premier fil conducteur auxiliaire (50a) et le second fil conducteur auxiliaire (50b) sont opposés l'un à l'autre, un espace les séparant, et sont organisés de préférence de manière alternée.
PCT/JP2014/074211 2013-12-02 2014-09-12 Feuille conductrice et panneau tactile WO2015083410A1 (fr)

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JP2013249099A JP6170420B2 (ja) 2013-12-02 2013-12-02 導電シート及びタッチパネル
JP2013-249099 2013-12-02

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JP2017027466A (ja) * 2015-07-24 2017-02-02 大日本印刷株式会社 タッチパネルセンサ、タッチパネル装置および表示装置
JP2017134484A (ja) * 2016-01-26 2017-08-03 凸版印刷株式会社 タッチパネル
JP2017188060A (ja) * 2016-04-04 2017-10-12 株式会社ジャパンディスプレイ 検出装置及び表示装置
CN108369877A (zh) * 2015-12-11 2018-08-03 株式会社则武 静电电容触摸开关
CN109117017A (zh) * 2017-06-26 2019-01-01 Vts-触动感应器有限公司 触摸面板及显示装置
US10642426B2 (en) 2015-12-23 2020-05-05 Lg Chem, Ltd. Touch screen sensor
CN111522468A (zh) * 2020-04-28 2020-08-11 武汉华星光电半导体显示技术有限公司 触控显示装置
US10908751B2 (en) 2016-04-04 2021-02-02 Japan Display Inc. Detection device and display device
CN112947786A (zh) * 2016-10-21 2021-06-11 株式会社日本显示器 检测装置及显示装置

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KR102408421B1 (ko) * 2015-08-18 2022-06-14 미래나노텍(주) 정전용량 방식의 터치스크린 패널 및 이의 감지 전극 센서
JP6439628B2 (ja) * 2015-08-26 2018-12-19 住友金属鉱山株式会社 導電性基板の製造方法
JP6511382B2 (ja) * 2015-10-16 2019-05-15 富士フイルム株式会社 導電性フィルム、及びこれを備える表示装置
CN105975141B (zh) * 2016-06-28 2019-03-29 业成光电（深圳）有限公司 触控面板及触控显示屏
JP6532074B2 (ja) * 2017-07-05 2019-06-19 積水ポリマテック株式会社 静電容量式タッチパネル
JP6910466B2 (ja) 2017-11-13 2021-07-28 富士フイルム株式会社 タッチパネル用導電部材、タッチパネルおよび導電部材
CN108958563B (zh) * 2018-07-26 2021-08-06 京东方科技集团股份有限公司 触摸屏及其制作方法、显示基板和触控显示装置
TWI704484B (zh) * 2019-07-31 2020-09-11 友達光電股份有限公司 觸控顯示裝置
JP7425584B2 (ja) 2019-11-20 2024-01-31 日本航空電子工業株式会社 タッチパネル
WO2022138034A1 (fr) * 2020-12-23 2022-06-30 富士フイルム株式会社 Élément conducteur pour un écran tactile, écran tactile et dispositif d'affichage à écran tactile

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JP2017027466A (ja) * 2015-07-24 2017-02-02 大日本印刷株式会社 タッチパネルセンサ、タッチパネル装置および表示装置
CN108369877B (zh) * 2015-12-11 2019-09-10 株式会社则武 静电电容触摸开关
CN108369877A (zh) * 2015-12-11 2018-08-03 株式会社则武 静电电容触摸开关
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US10642426B2 (en) 2015-12-23 2020-05-05 Lg Chem, Ltd. Touch screen sensor
JP2017134484A (ja) * 2016-01-26 2017-08-03 凸版印刷株式会社 タッチパネル
JP2017188060A (ja) * 2016-04-04 2017-10-12 株式会社ジャパンディスプレイ 検出装置及び表示装置
US10908751B2 (en) 2016-04-04 2021-02-02 Japan Display Inc. Detection device and display device
CN112947786A (zh) * 2016-10-21 2021-06-11 株式会社日本显示器 检测装置及显示装置
CN109117017A (zh) * 2017-06-26 2019-01-01 Vts-触动感应器有限公司 触摸面板及显示装置
EP3447619A1 (fr) * 2017-06-26 2019-02-27 VTS-Touchsensor Co., Ltd. Panneau tactile et dispositif d'affichage
CN111522468A (zh) * 2020-04-28 2020-08-11 武汉华星光电半导体显示技术有限公司 触控显示装置
CN111522468B (zh) * 2020-04-28 2021-11-02 武汉华星光电半导体显示技术有限公司 触控显示装置
US11520422B2 (en) 2020-04-28 2022-12-06 Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. Touch display device

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