WO2015125398A1 - Élément stratifié à électrodes pour panneau tactile, panneau tactile de type capacitif, et dispositif d'affichage équipé d'un panneau tactile tridimensionnel - Google Patents

Élément stratifié à électrodes pour panneau tactile, panneau tactile de type capacitif, et dispositif d'affichage équipé d'un panneau tactile tridimensionnel Download PDF

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Publication number
WO2015125398A1
WO2015125398A1 PCT/JP2014/084138 JP2014084138W WO2015125398A1 WO 2015125398 A1 WO2015125398 A1 WO 2015125398A1 JP 2014084138 W JP2014084138 W JP 2014084138W WO 2015125398 A1 WO2015125398 A1 WO 2015125398A1
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Prior art keywords
touch panel
electrode
random
display device
mesh
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PCT/JP2014/084138
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English (en)
Japanese (ja)
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佐藤　祐
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富士フイルム株式会社
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Publication of WO2015125398A1 publication Critical patent/WO2015125398A1/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 an electrode laminate for a touch panel, a capacitive touch panel, and a display device with a three-dimensional touch panel.
  • a so-called touch panel capable of performing various operations by touching with a finger
  • touch panels have begun to be used in large display devices such as personal computers.
  • ITO indium-tin composite oxide
  • the current transfer rate is slow because of insufficient conductivity.
  • the problem that the time (response speed) from when the touch panel is touched until the contact position is detected becomes prominent.
  • the present inventor has found that it is effective to employ a metal mesh electrode having a mesh pattern (mesh) by connecting a plurality of cells in which fine metal wires intersect each other. It was.
  • a mesh electrode made of a thin metal wire has high conductivity and can be provided at low cost.
  • the metal fine wire has an advantage that it is easy to bend because it is more flexible than a metal oxide such as ITO.
  • the present inventor is more periodic than a two-dimensional touch panel due to the periodicity of the metal mesh electrode and the display pixels.
  • easy interference (moire) is likely to occur.
  • the display pixels located under the touch panel are regularly arranged to provide the metal mesh electrode on a three-dimensional plane. Strong moire occurs at any position on the curved surface with respect to the pitch.
  • the present invention has been made to solve the above-described problems, and includes an electrode laminate for a touch panel that includes an electrode having high conductivity and can suppress moire when viewed from various angles, and a capacitive touch panel.
  • An object of the present invention is to provide a display device with a three-dimensional touch panel.
  • the electrode laminate for a touch panel in which the lower electrode and the upper electrode are laminated via an insulating layer, At least one of the lower electrode and the upper electrode is a metal mesh electrode configured by intersecting metal fine wires, and the metal mesh electrode has a random mesh pattern configured by random cells,
  • the electrode laminate for a touch panel is a three-dimensional curved body that is curved so as to bulge from the lower electrode toward the upper electrode or in the opposite direction.
  • the lower electrode is an electrode far from the touch surface in the pair of electrodes constituting the electrode laminate for the touch panel, while the upper electrode is on the touch surface in the pair of electrodes of the touch panel.
  • the insulating layer should just be what insulates a lower electrode and an upper electrode electrically, For example, a resin film etc. may be sufficient and an insulating adhesive agent may be sufficient as it.
  • the three-dimensional curved surface body refers to one having a curved surface that is curved so as to bulge from the lower electrode to the upper electrode side or in the opposite direction. That is, the electrode laminate for touch panel has at least one of convex or concave in the thickness direction.
  • the periodicity is low in a mesh electrode composed of a random pattern in which cells having random shapes and sizes are connected. Therefore, moiré is less likely to occur regardless of the viewing angle.
  • the random pattern refers to a pattern in which the shape and size of a plurality of cells forming the mesh electrode are different from each other, and therefore the periodicity (regularity or uniformity) of the cells is low.
  • the touch panel electrode laminate may be a three-dimensional curved body having a different curvature radius depending on a portion.
  • the change in the relationship between the mesh pitch and the pixel pitch is significant depending on the viewing angle, but even in this case, moire can be suppressed. This is because, as described above, the cells constituting the mesh electrode have a random pattern with low periodicity (regularity or uniformity).
  • both the lower electrode and the upper electrode have a random mesh pattern.
  • the random rate of a plurality of random cells is preferably 2 to 20%.
  • the random rate is too low, there is a high possibility that moire will be recognized depending on the viewing angle.
  • the random rate is excessively high, the resistance value of the mesh electrode tends to vary, and it may not be easy to drive as a touch panel. Further, if the random rate is excessively high, the viewer may feel a sense of granular noise on the display screen. The definition of the random rate will be described later.
  • the line width of the fine metal wire constituting the random cell is preferably 1 to 6 ⁇ m.
  • the thickness is less than 1 ⁇ m, the flexibility is lowered, and thus disconnection is likely to occur when the electrode laminate for a touch panel is formed. Moreover, when it exceeds 6 micrometers, there exists a tendency for the noise feeling resulting from a random mesh to become strong.
  • the lower electrode preferably has a strip shape extending along the first direction, and a plurality of lower electrodes are arranged in parallel along the second direction orthogonal to the first direction.
  • the upper electrode has a strip shape extending along the second direction, and a plurality of upper electrodes may be arranged in parallel along the first direction.
  • the present invention is a capacitive touch panel including the touch panel electrode laminated body configured as described above.
  • the present invention is a display device with a three-dimensional touch panel provided with the above capacitive touch panel and a display device.
  • An air gap may be interposed between the touch panel and the display device.
  • the display surface of the display device may be a flat surface.
  • the lower electrode or the upper electrode in the electrode laminate for a touch panel which is a three-dimensional curved body, is formed of a mesh electrode having a random pattern in which cells having random shapes, sizes, and the like are connected.
  • Such metal mesh electrodes are less likely to cause periodic interference, so that moire is sufficiently reduced.
  • FIG. 5 is a schematic front view showing a lower electrode and an upper electrode that constitute an electrode laminate of Comparative Example 1.
  • FIG. It is a schematic front view which shows the lower electrode and upper electrode which comprise the electrode laminated body of the comparative example 2.
  • ⁇ indicating a numerical range is used as a meaning including numerical values described before and after the numerical value as a lower limit value and an upper limit value.
  • upper refers to the side (outer surface side) closer to the viewer viewing the display device with a three-dimensional touch panel, while “lower” refers to the side farther from the viewer (inner surface side).
  • FIG. 1 is a schematic cross-sectional view of an essential part along the thickness direction of a display device 10 with a three-dimensional touch panel according to the present embodiment.
  • the display device 10 with a three-dimensional touch panel includes a touch panel 14 (capacitive touch panel) including an electrode stack 12 (electrode stack for touch panel), and the touch panel 14 is bonded to the display device 16. Is made up of.
  • the display device 16 has a display screen 18 (display surface) for displaying at least an image, text, and the like.
  • the display screen 18 displays an image or text under the control action of a control circuit (IC circuit or the like) (not shown) according to a command input to the touch panel 14.
  • the display screen 18 is formed as a flat surface without undulations.
  • the display device 16 is not particularly limited, but suitable examples include a liquid crystal display, a plasma display, an organic EL display (Organic Electro-Luminescence), an inorganic EL display, electronic paper, and the like.
  • the edge of the touch panel 14 is bonded to the side of the display device 16 via the adhesive 20.
  • the upper surface of the touch panel 14 is roughly divided into a display area 22 where a touch operation is performed covering the display screen 18 of the display device 16 and a button operation area 24 where operation buttons are arranged. Further, the upper surface of the touch panel 14 is curved so as to bulge vertically upward from the outer edge toward the inner side. That is, in this case, the touch panel 14 is a three-dimensional curved body having a curved surface.
  • the display device 16 and the touch panel 14 are separated by a predetermined clearance. This is because the display screen 18 of the display device 16 is flat while the touch panel 14 is a three-dimensional curved surface. As described above, when the touch panel is a three-dimensional curved body, if the display device is flat, a gap is generated between the display screen and the touch panel. When the location where the gap is maximized is 500 ⁇ m or more, it is preferable to use the air gap 26 in which air is accommodated from the viewpoint of transmittance. In the case of 500 ⁇ m or more, a difference in viewing angle is likely to occur between the periodicity of the metal mesh electrode and the periodicity of the pixels of the display device, and the angle dependency of the moire becomes large. The effect of the invention is increased.
  • the touch panel 14 includes an electrode laminate 12 that is a sensor body, the control circuit (not shown), and a protective layer (not shown) that covers the upper surface of the touch panel 14.
  • the electrode laminate 12 in this structure is configured by forming a lower electrode 30 and an upper electrode 32 on the lower end surface and upper end surface of a transparent base 28 made of an insulator, respectively, as shown in FIG. Is done.
  • the lower electrode 30 is an electrode far from the touch surface in the pair of electrodes of the touch panel 14
  • the upper electrode 32 is an electrode on the touch surface in the pair of electrodes of the touch panel 14.
  • the electrode on the near side is
  • the thickness of the transparent substrate 28 is preferably 20 to 350 ⁇ m or less, more preferably 30 to 250 ⁇ m, and particularly preferably 40 to 200 ⁇ m.
  • Examples of the transparent substrate 28 include a plastic film, a plastic plate, and a glass plate.
  • polyesters such as polyethylene terephthalate (PET) and polyethylene naphthalate (PEN); polyethylene (PE), polypropylene (PP), polystyrene, polyethylene vinyl acetate (EVA), and the like.
  • PET polyethylene terephthalate
  • PEN polyethylene naphthalate
  • PE polyethylene
  • PP polypropylene
  • EVA polyethylene vinyl acetate
  • Polyolefins; vinyl resins; polycarbonate (PC), polyamide, polyimide, acrylic resin, triacetyl cellulose (TAC), cycloolefin polymer (COP), and the like can be used.
  • the transmittance of the transparent substrate 28 is preferably 85% or more.
  • both the lower electrode 30 and the upper electrode 32 are made of metal fine wires 34 and metal mesh electrodes having a random mesh pattern formed by connecting random cells having random shapes and sizes.
  • the cell forming the lower electrode 30 is referred to as “first cell”
  • the cell forming the upper electrode 32 is referred to as “second cell”
  • the respective reference numerals are referred to as 36 and 38.
  • the lower electrode 30 has a plurality of strip-like patterns each extending in the first direction (x direction / longitudinal direction) as shown in FIG.
  • the lower electrode 30 has a predetermined width direction dimension in the second direction (direction perpendicular to the first direction: y direction), and a plurality of the lower electrodes 30 are arranged in parallel along the y direction.
  • the “strip shape” refers to a long shape extending with a predetermined width direction dimension, but also includes a shape whose width direction dimension varies periodically (repeating the expansion and contraction). And The same applies to the upper electrode 32 described later.
  • Each lower electrode 30 is formed by crossing thin metal wires 34 made of silver, copper, molybdenum, or an alloy containing one or more of them. Along with this intersection, a plurality of spaces (openings) surrounded by the thin metal wires 34, that is, the first cells 36 are formed.
  • the metal thin line 34p that connects the vertex C1 and the vertex C2 with a straight line
  • the metal thin line 34q that connects the vertex C2 and the vertex C3 with a straight line
  • the vertex C3 and the vertex C4 with a straight line.
  • the thin metal wire 34r and the thin metal wire 34s that connects the vertex C4 and the vertex C1 with a straight line form a polygonal shape.
  • the other cells (first cells 36) have a polygonal shape.
  • the lower electrode 30 is a metal mesh electrode having a random mesh pattern composed of random cells having different shapes and sizes of the first cells 36 and low periodicity (regularity or uniformity).
  • the shape of such a random mesh pattern can be set by, for example, the Voronoi division method or the Delaunay triangulation method. Specific operations for setting a random mesh pattern are described in detail in paragraphs ⁇ 0080> to ⁇ 0083> of JP2013-54619A.
  • the difference in cell size of the lower electrode 30, that is, the random ratio is preferably 2 to 20%, more preferably 4 to 10%. More preferably, it is 6 to 8%.
  • the random rate means that any 30 first cells 36 constituting a random mesh pattern are taken out, and among the lengths Ld of one side of each first cell 36, the maximum value is Ldmax, the minimum value is Ldmin, When the average value is Ldave, the larger value among the values obtained by the following formulas (1) and (2) is extracted in each cell and defined as the average value of 30. (Ldmax ⁇ Ldave) / Ldave ⁇ 100 (1) (Ldave ⁇ Ldmin) / Ldave ⁇ 100 (2)
  • the random rate is less than 2%, the cell size of each first cell 36 becomes almost uniform, and the moire suppressing effect due to the arrangement of the plurality of first cells 36 becomes low.
  • the random rate exceeds 20%, the resistance value of the lower electrode 30 varies, and the detection sensitivity may be reduced. Moreover, there is a possibility that a granular noise sensation is generated on the display screen.
  • the width direction dimension (line width) of the fine metal wire 34 is not particularly limited, but is preferably 6 ⁇ m or less. By reducing the line width in this way, it is possible to suppress noise in the display device 10 with a three-dimensional touch panel that employs a random mesh. In addition, the fact that the shape of the first cell 36 is random and the line width of the fine metal wire 34 are so small, the moire is improved and the visibility is improved.
  • the line width is more preferably 4 ⁇ m or less.
  • the line width of the fine metal wire 34 is excessively small, the flexibility is lowered. For this reason, when the electrode laminated body 12 is made into a three-dimensional curved surface body, a disconnection may occur. In order to reduce this possibility, it is preferable to set the line width of the fine metal wire 34 to 1 ⁇ m or more. In this case, sufficient conductivity can be ensured for the lower electrode 30.
  • the average cell pitch of the lower electrode 30 is preferably 50 to 400 ⁇ m, and more preferably 50 to 300 ⁇ m.
  • the average cell pitch of the lower electrode 30 is defined by an average length obtained by measuring the maximum length of the first cell 36 in the x direction in which the lower electrode 30 extends in an arbitrary 30 cells.
  • a first terminal wiring portion 40 is electrically connected to one end portion of each lower electrode 30 via a first connection portion 39.
  • the first terminal wiring portion 40 is routed toward a substantially central portion of one side extending along the y direction, and is electrically connected to the first terminal portion 48.
  • the first terminal portion 48 is electrically connected to the control circuit.
  • the space between adjacent lower electrodes 30 is blank.
  • a dummy mesh may be disposed between the adjacent lower electrodes 30.
  • the cells forming the dummy mesh preferably have a random shape like the lower electrode 30.
  • the dummy mesh is not used as an electrode, even if the random rate is high, there is no particular problem. However, if the random rate is significantly different from the electrodes, the lower electrode 30 may be visually recognized. Therefore, when the dummy mesh is a random mesh, the random rate is preferably 2 to 20% as in the lower electrode 30. Of course, it is preferable to employ a mesh having a random rate equivalent to that of the lower electrode 30 as the dummy mesh.
  • the upper electrode 32 formed on the upper end surface of the transparent substrate 28 has a plurality of strip-like patterns each extending in the second direction (y direction / longitudinal direction).
  • the upper electrode 32 has a predetermined width direction dimension in the first direction (direction orthogonal to the second direction: x direction), and a plurality of the upper electrodes 32 are arranged in parallel along the x direction.
  • each upper electrode 32 is formed by intersecting metal thin wires 34 with each other. Along with this intersection, a second cell 38 surrounded by the thin metal wire 34 is formed.
  • the mesh pattern of the upper electrode 32 is random like the lower electrode 30. That is, the size and shape of the plurality of second cells 38 are different from each other in the same manner as the first cells 36 and have low periodicity (regularity or unity). Note that the preferable line width of the thin metal wire 34 in the second cell 38 and the reason thereof, the method of determining the wiring shape of the second cell 38, and the like are the same as those of the first cell 36.
  • the random ratio of the upper electrode 32 is preferably 2 to 20%, more preferably 4 to 10%, and further preferably 6 to 8% for the same reason as the lower electrode 30.
  • the average cell pitch is preferably 50 to 400 ⁇ m, and more preferably 50 to 300 ⁇ m, like the lower electrode 30.
  • the average cell pitch of the upper electrode 32 is defined by an average length obtained by measuring the maximum length of the second cell 38 in the y direction in which the upper electrode 32 extends in any 30 cells.
  • a second terminal wiring portion 52 is electrically connected to one end portion of each upper electrode 32 via a second connection portion 50.
  • the second terminal wiring portion 52 is routed toward a substantially central portion of one side extending along the x direction, and is electrically connected to the second terminal portion 54.
  • the second terminal portion 54 is electrically connected to the control circuit.
  • the space between the adjacent upper electrodes 32 is blank.
  • a dummy mesh may be disposed between the adjacent upper electrodes 32.
  • the cells forming the dummy mesh preferably have a random shape like the upper electrode 32.
  • the dummy mesh is not used as an electrode, there is no particular problem even if the random rate is high. However, if the random rate is significantly different from the electrodes, the upper electrode 32 may be visually recognized. Therefore, when the dummy mesh is a random mesh, the random rate is preferably 2 to 20%, similar to the upper electrode 32. Of course, it is preferable to employ a mesh having a random rate equivalent to that of the upper electrode 32 as the dummy mesh.
  • the lower electrode 30 and the upper electrode 32 it is preferable to employ a random mesh as described above.
  • the random ratio of the lower electrode 30 and the upper electrode 32 it is preferable to increase the random ratio of an electrode having a large electrode width, while decreasing the random ratio for an electrode having a small electrode width.
  • the electrode width often increases the lower electrode 30 and decreases the upper electrode 32 in order to improve detection sensitivity.
  • the random rate of the lower electrode 30 is preferably set higher than the random rate of the upper electrode 32.
  • the detection sensitivity can be increased by setting the mesh pitch of the upper electrode 32 larger than that of the lower electrode 30.
  • the lower electrode 30 and the upper electrode 32 are preferably formed by etching using a photolithography process, or by a microcontact printing patterning method, a silver salt method, or an intaglio metal particle filling method. can do.
  • the silver salt method is more preferable.
  • the microcontact printing patterning method is a method for obtaining a pattern having a narrow line width by using the microcontact printing method.
  • the microcontact printing method is a method for producing a monomolecular film pattern by using an elastic polydimethylsiloxane stamp and bringing a thiol solution into contact with a gold base material as an ink (Whitedesed, Angew. Chem. Int. Ed., 1998, volume 37, page 550).
  • a typical process of the microcontact printing patterning method is, for example, as follows. That is, first, the substrate is coated with a metal (eg, silver is sputter coated onto a PET substrate).
  • a metal eg, silver is sputter coated onto a PET substrate.
  • the masking of the monomolecular film is stamped using a microcontact printing method on a metal-coated substrate. Thereafter, the metal coated on the substrate is removed by etching except for the pattern under masking.
  • the intaglio metal particle filling method is a method of forming a metal mesh by exposing a resist in a mesh shape to form a mesh-like groove and filling the groove with ink in which metal particles are dispersed.
  • the method described in Chinese Patent No. 102063951 can be applied.
  • the silver salt method is to obtain a pattern of fine metal wires 34 having a mesh shape by exposing and developing a photosensitive material having a photosensitive silver salt-containing layer. Specific operations thereof are described in detail in paragraphs ⁇ 0163> to ⁇ 0241> of JP2009-4348A.
  • the transparent base 28 on which the lower electrode 30 and the upper electrode 32 are formed in this way is curved so as to bulge toward the upper electrode 32, for example, and the shape thereof is maintained. Thereby, the electrode laminated body 12 as a three-dimensional curved surface body is obtained.
  • the touch panel 14 including the electrode laminate 12 is bonded to the display device 16 via an adhesive 20. Thereby, the display apparatus 10 with a three-dimensional touch panel is obtained.
  • the touch panel 14 since the fine metal wires 34 forming the first cells 36 and the thin metal wires 34 forming the second cells 38 have high conductivity, the touch panel 14 exhibits sufficient conductivity. For this reason, sufficient response speed is ensured.
  • 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.
  • both the lower electrode 30 and the upper electrode 32 have a random mesh pattern, but either the lower electrode 30 or the upper electrode 32 has a random mesh pattern, and the remaining one has a regular mesh pattern. You may make it.
  • the lower electrode 30 and the upper electrode 32 are formed on the same transparent substrate 28, but the lower electrode 30 or the upper electrode 32 are individually formed on separate transparent substrates 28 and 28. Thereafter, the transparent substrates 28 and 28 may be bonded together. For this bonding, an insulating adhesive may be used.
  • Example 1 The metal laminate electrode (lower electrode 30 and upper electrode 32) was insert-molded to produce the electrode laminate 12 having the cross-sectional shape shown in FIG.
  • Polycarbonate (PC) was used as the extrusion resin used for insert molding.
  • the curvature of the display area 22 varies depending on the location and is not constant.
  • the strip-like lower electrode 30 and upper electrode 32 constituting the touch panel 14 were designed as a random mesh with a cell random rate of 1% in accordance with the description in Japanese Patent Application Laid-Open No. 2013-54619.
  • the average cell pitch is 200 ⁇ m
  • the line width of the fine metal wires 34 is 5 ⁇ m
  • the dimension in the width direction orthogonal to the longitudinal direction is 5 mm
  • a space of 1 mm is provided between the adjacent lower electrodes 30 or the upper electrodes 32, and between the electrodes.
  • a dummy mesh having the same specifications as the electrodes was placed.
  • the touch panel 14 including the electrode laminate 12 as described above is bonded to a commercially available liquid crystal display having a diagonal size of 5 inches (a micro color TFT liquid crystal monitor unit manufactured by Groovy), and a display device with a three-dimensional touch panel according to FIG. 10 was produced.
  • a commercially available liquid crystal display having a diagonal size of 5 inches a micro color TFT liquid crystal monitor unit manufactured by Groovy
  • a display device with a three-dimensional touch panel according to FIG. 10 was produced.
  • Example 2 to 5 A random mesh was designed such that the random rate was the value shown in Table 1 below. Other than that was carried out similarly to Example 1, and produced the display apparatus 10 with a three-dimensional touchscreen. Each of these is referred to as Examples 2-5.
  • Example 6 A display device 10 with a three-dimensional touch panel was produced in the same manner as in Example 4 except that the mesh line width was changed as shown in Table 1. Each is designated as Examples 6-9.
  • Comparative Example 1 Both the upper electrode and the lower electrode were formed as metal mesh electrodes in which the rhombic cells 60 shown in FIG. Further, the crossing angle ⁇ 1 of the rhombus cell 60 was set to 62.5 °, and the cell pitch indicated by P1 in FIG. 5 was set to 200 ⁇ m. Other than that was based on Example 1, and produced the display apparatus with a three-dimensional touch panel. This is referred to as Comparative Example 1.
  • Comparative Example 2 Both the upper electrode and the lower electrode were formed as metal mesh electrodes in which hexagonal cells 62 shown in FIG. A display device with a three-dimensional touch panel was produced in the same manner as in Comparative Example 1 except that the cell pitch indicated by P2 in FIG. 6 was 173 ⁇ m. This is referred to as Comparative Example 2.
  • connection rate The number of unexpected disconnections of the fine metal wire 34 was measured at a location where the radius of curvature of the three-dimensional shape was the largest. This measurement was performed using a microscope. A case where disconnection is not observed "A”, disconnection in the following two places per 1 cm 2, "B” and if a level as not to practical problem, it is disconnection 1 cm 2 per three or more, the allowable range The case of the outside level was designated as “C”.
  • Table 1 also includes evaluation of front moire evaluation, moire viewing angle dependence, noise sensation, occurrence rate of disconnection, and resistance value correction necessity for the display devices with a three-dimensional touch panel of Examples 1 to 9 and Comparative Examples 1 and 2. It shows. From Table 1, it can be seen that by making the mesh pattern random, it is possible to suppress the occurrence of moire and disconnection while avoiding an increase in noise.
  • both the lower electrode 30 and the upper electrode 32 are formed of random cells, the occurrence of moire (periodic interference) due to the difference in pitch between the upper electrode 32 and the lower electrode 30 is suppressed. is there.
  • both the upper electrode 32 and the lower electrode 30 are formed in a regular pattern made of rhombuses, etc., the density of interference periodically occurs and strong moire is visually recognized, but a mesh having random cells is adopted. In this case, moire is not recognized even when the observation angle is changed. For this reason, the degree of freedom in design increases.
  • a touch panel with reduced moire can be configured by using random mesh electrodes.
  • SYMBOLS 10 Display apparatus with a three-dimensional touch panel 12 ... Electrode laminated body 14 for touch panels ... Capacitive touch panel 16 ... Display apparatus 18 ... Display screen 20 ... Adhesive 26 ... Air gap 28 ... Transparent base 30 ... Lower electrode 32 . Upper electrode 34, 34p, 34q, 34r, 34s ... fine metal wire 36 ... first cell 38 ... second cell

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  • General Engineering & Computer Science (AREA)
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Abstract

L'invention concerne un élément stratifié à électrodes destiné à un panneau tactile et comprenant un élément stratifié à électrodes comportant un élément à surface courbe tridimensionnelle, l'élément stratifié à électrodes permettant l'atténuation du moiré lorsqu'il est vu sous divers angles. L'invention concerne également un panneau tactile de type capacitif et un dispositif d'affichage équipé d'un panneau tactile tridimensionnel. Dans l'élément stratifié (12) à électrodes pour panneau tactile, une électrode inférieure (30) et une électrode supérieure (32) sont stratifiées par l'intermédiaire d'une couche isolante. Au moins une électrode parmi l'électrode inférieure (30) et l'électrode supérieure (32) est formée de fils métalliques fins (34) s'entrecroisant, et constitue une électrode à maillage aléatoire reliant une pluralité de cellules aléatoires présentant des formes mutuellement différentes. L'élément stratifié (12) à électrodes pour panneau tactile est un élément à surface courbe tridimensionnelle incurvé de façon à être convexe dans une direction allant de l'électrode inférieure (30) vers l'électrode supérieure (32) ou dans la direction opposée.
PCT/JP2014/084138 2014-02-19 2014-12-24 Élément stratifié à électrodes pour panneau tactile, panneau tactile de type capacitif, et dispositif d'affichage équipé d'un panneau tactile tridimensionnel WO2015125398A1 (fr)

Applications Claiming Priority (2)

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JP2014029255A JP6109767B2 (ja) 2014-02-19 2014-02-19 タッチパネル用電極積層体、静電容量式タッチパネル及び三次元タッチパネル付表示装置
JP2014-029255 2014-02-19

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016060147A1 (fr) * 2014-10-15 2016-04-21 富士フイルム株式会社 Film électroconducteur, dispositif d'affichage doté de celui-ci, et procédé d'évaluation de motif de câblage de film électroconducteur
JP2017097439A (ja) * 2015-11-18 2017-06-01 凸版印刷株式会社 導電性フィルム、タッチパネル、および、表示装置
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WO2016060147A1 (fr) * 2014-10-15 2016-04-21 富士フイルム株式会社 Film électroconducteur, dispositif d'affichage doté de celui-ci, et procédé d'évaluation de motif de câblage de film électroconducteur
JP2017097439A (ja) * 2015-11-18 2017-06-01 凸版印刷株式会社 導電性フィルム、タッチパネル、および、表示装置
EP3686717A4 (fr) * 2017-09-21 2021-06-09 BOE Technology Group Co., Ltd. Panneau tactile et son procédé de fabrication, et panneau d'affichage tactile

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